EnvironmentProbeControl, for simpler env baking

.github/actions/tools/bintray.sh

@@ -1,93 +0,0 @@
-#!/bin/bash
-
-# bintray_createPackage [REPO] [PACKAGE] [USER] [PASSWORD] [GIT REPO] [LICENSE]
-function bintray_createPackage {
-    repo="$1"
-    package="$2"
-    user="$3"
-    password="$4"
-    srcrepo="$5"
-    license="$6"
-
-    repoUrl="https://api.bintray.com/packages/$repo"
-    if [ "`curl -u$user:$password -H Content-Type:application/json -H Accept:application/json \
-    --write-out %{http_code} --silent --output /dev/null -X GET \"$repoUrl/$package\"`" != "200" ];
-    then
-
-        if [ "$srcrepo" != "" -a "$license" != "" ];
-        then 
-            echo "Package does not exist... create."
-            data="{
-                \"name\": \"${package}\",
-                \"labels\": [],
-                \"licenses\": [\"${license}\"],
-                \"vcs_url\": \"${srcrepo}\"
-            }"
-     
-
-            curl -u$user:$password -H "Content-Type:application/json" -H "Accept:application/json" -X POST \
-                -d "${data}" "$repoUrl"
-        else
-            echo "Package does not exist... you need to specify a repo and license for it to be created."
-        fi
-    else    
-        echo "The package already exists. Skip."
-    fi
-}
-
-# uploadFile file destination [REPO] "content" [PACKAGE] [USER] [PASSWORD] [SRCREPO] [LICENSE]
-function bintray_uploadFile {
-    file="$1"
-    dest="$2"
-    
-    echo "Upload $file to $dest"
-
-    repo="$3"
-    type="$4"
-    package="$5"
-
-    user="$6"
-    password="$7"
-   
-    srcrepo="$8"
-    license="$9"
-    publish="${10}"
-
-    bintray_createPackage $repo $package $user $password $srcrepo $license
-
-    url="https://api.bintray.com/$type/$repo/$package/$dest"
-    if [ "$publish" = "true" ]; then url="$url;publish=1"; fi
-
-    curl -T "$file" -u$user:$password "$url"
-     
-}
-
-function bintray_uploadAll {
-    path="$1"
-    destpath="$2"
-    repo="$3"
-    type="$4"
-    package="$5"
-
-    user="$6"
-    password="$7"
-   
-    srcrepo="$8"
-    license="$9"
-    publish="${10}"
-
-    cdir="$PWD"
-    cd "$path"
-
-    files="`find . -type f -print`"
-    IFS="
-"
-    set -f
-    for f in $files; do
-        destfile="$destpath/${f:2}"
-        bintray_uploadFile $f $destfile $repo $type $package $user $password $srcrepo $license $publish
-    done
-    set +f
-    unset IFS
-    cd "$cdir"
-}

.github/actions/tools/uploadToMaven.sh

@@ -1,85 +0,0 @@
-#!/bin/bash
-#############################################
-#
-# Usage
-#       uploadAllToMaven path/of/dist/maven https://api.bintray.com/maven/riccardo/sandbox-maven/ riccardo $BINTRAY_PASSWORD gitrepo license
-#           Note: gitrepo and license are needed only when uploading to bintray if you want to create missing packages automatically
-#                   gitrepo must be a valid source repository
-#                   license must be a license supported by bintray eg "BSD 3-Clause"
-#   or
-#       uploadAllToMaven path/of/dist/maven $GITHUB_PACKAGE_REPOSITORY user password
-#
-#############################################
-root="`dirname  ${BASH_SOURCE[0]}`"
-source $root/bintray.sh
-
-set -e
-function uploadToMaven {
-    file="$1"
-    destfile="$2"
-    repourl="$3"
-    user="$4"
-    password="$5"
-    srcrepo="$6"
-    license="$7"
-
-    auth=""
-
-    if [ "$user" != "token" ];
-    then
-        echo "Upload with username $user and password"
-        auth="-u$user:$password"
-    else
-        echo "Upload with token"
-        auth="-H \"Authorization: token $password\""
-    fi
-
-    
-    if [[ $repourl == https\:\/\/api.bintray.com\/* ]]; 
-    then 
-        package="`dirname $destfile`"
-        version="`basename $package`"
-        package="`dirname $package`"
-        package="`basename $package`"
-
-        if [ "$user" = "" -o "$password" = "" ];
-        then
-            echo "Error! You need username and password to upload to bintray"
-             exit 1
-        fi
-        echo "Detected bintray"
-
-        bintrayRepo="${repourl/https\:\/\/api.bintray.com\/maven/}"   
-        echo "Create package on $bintrayRepo"
-
-        bintray_createPackage $bintrayRepo $package $user $password $srcrepo $license  
-        
-        repourl="$repourl/$package"    
-    fi
-
-    cmd="curl -T \"$file\" $auth \
-        \"$repourl/$destfile\" \
-        -vvv"
-
-    echo "Run $cmd"
-    eval "$cmd"    
-}
-export -f uploadToMaven
-
-function uploadAllToMaven {
-    path="$1"
-    cdir="$PWD"
-    cd "$path"
-    files="`find . \( -name "*.jar" -o -name "*.pom" \) -type f -print`"
-    IFS="
-"
-    set -f
-    for art in $files; do
-        art="${art:2}"
-        uploadToMaven "$art" "$art" ${@:2}   
-    done
-    set +f
-    unset IFS
-
-    cd "$cdir"
-} 

.github/workflows/main.yml

@@ -1,554 +0,0 @@
-######################################################################################
-# JME CI/CD 
-######################################################################################
-# Quick overview of what is going on in this script:
-#   - Build natives for android
-#   - Build natives for linux arm
-#   - Build natives for windows,mac,linux x86_64 and x86
-#   - Merge the natives, build the engine, create the zip release, maven artifacts, javadoc and native snapshot
-#   - (only when there is a change in the native code) Deploy the native snapshot to bintray
-#   - (only when building a release) Deploy everything else to github releases, github packet registry and bintray
-#   - (only when building a release) Update javadoc.jmonkeyengine.org
-# Note:
-#   All the actions/upload-artifact and actions/download-artifact steps are used to pass 
-#   stuff between jobs, github actions has some sort of storage that is local to the
-#   running workflow, we use it to store the result of each job since the filesystem
-#   is not maintained between jobs.
-################# CONFIGURATIONS #####################################################
-# >> Configure BINTRAY RELEASE & NATIVE SNAPSHOT
-#   Configure the following secrets/variables (customize the values with your own)
-#     BINTRAY_GENERIC_REPO=riccardoblsandbox/jmonkeyengine-files
-#     BINTRAY_MAVEN_REPO=riccardoblsandbox/jmonkeyengine
-#     BINTRAY_USER=riccardo
-#     BINTRAY_APIKEY=XXXXXX
-#     BINTRAY_LICENSE="BSD 3-Clause"
-# >> Configure  PACKAGE REGISTRY RELEASE
-#   Nothing to do here, everything is autoconfigured to work with the account/org that 
-#   is running the build.
-# >> Configure  JAVADOC
-#     JAVADOC_GHPAGES_REPO="riccardoblsandbox/javadoc.jmonkeyengine.org.git"
-#   Generate a deloy key
-#       ssh-keygen -t rsa -b 4096 -C "actions@users.noreply.github.com" -f javadoc_deploy
-#   Set
-#     JAVADOC_GHPAGES_DEPLOY_PRIVKEY="......."
-#   In github repo -> Settings, use javadoc_deploy.pub as Deploy key with write access  
-######################################################################################
-# Resources:
-#   - Github actions docs: https://help.github.com/en/articles/about-github-actions
-#   - Package registry docs: https://help.github.com/en/articles/about-github-package-registry
-#   - Official actions: https://github.com/actions
-#   - Community actions: https://github.com/sdras/awesome-actions
-######################################################################################
-# - Riccardo Balbo
-######################################################################################
-
-name: Build jMonkeyEngine
-on:
-  push:
-    branches:
-      - master
-      - newbuild
-      - v3.3.*
-      - v3.2
-      - v3.2.*
-  pull_request:
-  release:
-    types: [published]
-  
-jobs:
-  
-  # Builds the natives on linux arm
-  BuildLinuxArmNatives:
-    name: Build natives for linux (arm)
-    runs-on: ubuntu-18.04
-    container:
-      image: riccardoblb/buildenv-jme3:linuxArm
-   
-    steps:
-      - name: Clone the repo
-        uses: actions/checkout@v2     
-        with:
-          fetch-depth: 1
-      - name: Validate the Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
-      - name: Build
-        run: |
-          # Build
-          # Note: since this is crossbuild we use the buildForPlatforms filter to tell
-          # the buildscript wich platforms it should build for.
-          ./gradlew -PuseCommitHashAsVersionName=true --no-daemon -PbuildForPlatforms=LinuxArm,LinuxArmHF,LinuxArm64 -PbuildNativeProjects=true \
-          :jme3-bullet-native:assemble 
-
-      - name: Upload natives
-        uses: actions/upload-artifact@master
-        with:
-          name: linuxarm-natives
-          path: build/native 
-
-  # Build the natives on android
-  BuildAndroidNatives:
-    name: Build natives for android
-    runs-on: ubuntu-18.04
-    container:
-      image: riccardoblb/buildenv-jme3:android
-  
-    steps:
-      - name: Clone the repo
-        uses: actions/checkout@v2     
-        with:
-          fetch-depth: 1
-      - name: Validate the Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
-      - name: Build
-        run: |
-          ./gradlew -PuseCommitHashAsVersionName=true --no-daemon -PbuildNativeProjects=true \
-          :jme3-android-native:assemble \
-          :jme3-bullet-native-android:assemble 
-     
-      - name: Upload natives
-        uses: actions/upload-artifact@master
-        with:
-          name: android-natives
-          path: build/native
-
-  # Build the natives
-  BuildNatives:
-    strategy:
-      fail-fast: true
-      matrix:
-        os: [ubuntu-18.04,windows-2019,macOS-latest] 
-        jdk: [8.x.x]
-        include:
-          - os: ubuntu-18.04
-            osName: linux
-          - os: windows-2019
-            osName: windows
-          - os: macOS-latest
-            osName: mac
-              
-    name: Build natives for ${{ matrix.osName }}
-    runs-on: ${{ matrix.os }}    
-    steps:    
-    
-      - name: Clone the repo
-        uses: actions/checkout@v2     
-        with:
-          fetch-depth: 1
-           
-      - name: Prepare java environment
-        uses: actions/setup-java@v1
-        with:
-          java-version: ${{ matrix.jdk }}
-          architecture: x64
-      - name: Validate the Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
-      - name: Build Natives
-        shell: bash
-        env:
-          OS_NAME: ${{ matrix.osName }}
-        run: |
-          # Install dependencies
-          if [ "$OS_NAME" = "mac" ];
-          then
-            echo "Prepare mac"        
-          
-          elif [ "$OS_NAME" = "linux" ];
-          then
-            echo "Prepare linux"
-            sudo apt-get update
-            sudo apt-get install -y gcc-multilib g++-multilib
-          else
-            echo "Prepare windows"
-          fi
-          
-          # Build
-          ./gradlew  -PuseCommitHashAsVersionName=true --no-daemon  -PbuildNativeProjects=true -Dmaven.repo.local="$PWD/dist/maven" \
-          build \
-          :jme3-bullet-native:build
-                  
-      # Upload natives to be used later by the BuildJMonkey job
-      - name: Upload natives
-        uses: actions/upload-artifact@master
-        with:
-          name: ${{ matrix.osName }}-natives
-          path: build/native
- 
-
-  # Build the engine, we only deploy from ubuntu-18.04 jdk8
-  BuildJMonkey:  
-    needs: [BuildNatives,BuildAndroidNatives]
-    name: Build on ${{ matrix.osName }} jdk${{ matrix.jdk }}
-    runs-on: ${{ matrix.os }}    
-    strategy:
-      fail-fast: true
-      matrix:
-        os: [ubuntu-18.04,windows-2019,macOS-latest]
-        jdk: [8.x.x,11.x.x]
-        include:
-          - os: ubuntu-18.04
-            osName: linux
-            deploy: true
-          - os: windows-2019
-            osName: windows
-          - os: macOS-latest
-            osName: mac 
-          - jdk: 11.x.x
-            deploy: false 
-
-    steps:          
-      - name: Clone the repo
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 1
-          
-      - name: Setup the java environment
-        uses: actions/setup-java@v1
-        with:
-          java-version: ${{ matrix.jdk }}
-          architecture: x64
-
-      - name: Download natives for linux
-        uses: actions/download-artifact@master
-        with:
-          name: linux-natives
-          path: build/native
-
-      - name: Download natives for windows
-        uses: actions/download-artifact@master
-        with:
-          name: windows-natives
-          path: build/native
-
-      - name: Download natives for mac
-        uses: actions/download-artifact@master
-        with:
-          name: mac-natives
-          path: build/native
-
-      - name: Download natives for android
-        uses: actions/download-artifact@master
-        with:
-          name: android-natives
-          path: build/native
-
-      - name: Download natives for linux (arm)
-        uses: actions/download-artifact@master
-        with:
-          name: linuxarm-natives
-          path: build/native
-      - name: Validate the Gradle wrapper
-        uses: gradle/wrapper-validation-action@v1
-      - name: Build Engine
-        shell: bash
-        run: |
-          # Build
-          ./gradlew -PuseCommitHashAsVersionName=true -PskipPrebuildLibraries=true build
-          
-          if [ "${{ matrix.deploy }}" = "true" ];
-          then  
-            # We are going to need "zip"
-            sudo apt-get update
-            sudo apt-get install -y zip
-
-            # Create the zip release and the javadoc
-            ./gradlew -PuseCommitHashAsVersionName=true -PskipPrebuildLibraries=true mergedJavadoc createZipDistribution
-          
-            # We prepare the release for deploy
-            mkdir -p ./dist/release/
-            mv build/distributions/*.zip dist/release/
-            
-            # Create the maven artifacts
-            mkdir -p ./dist/maven/
-            ./gradlew -PuseCommitHashAsVersionName=true -PskipPrebuildLibraries=true install -Dmaven.repo.local="$PWD/dist/maven"
-
-            # Zip the natives into a single archive (we are going to use this to deploy native snapshots)
-            echo "Create native zip"
-            cdir="$PWD"
-            cd "build/native"
-            zip -r "$cdir/dist/jme3-natives.zip" *       
-            cd "$cdir"
-            echo "Done"
-          fi         
-
-      # Used later by DeploySnapshot
-      - name: Upload merged natives
-        if: matrix.deploy==true
-        uses: actions/upload-artifact@master
-        with:
-          name: natives
-          path: dist/jme3-natives.zip
-          
-      # Upload maven artifacts to be used later by the deploy job
-      - name: Upload maven artifacts
-        if: matrix.deploy==true
-        uses: actions/upload-artifact@master
-        with:
-          name: maven
-          path: dist/maven          
-
-      - name: Upload javadoc
-        if:  matrix.deploy==true
-        uses: actions/upload-artifact@master
-        with:
-          name: javadoc
-          path: dist/javadoc        
-          
-      # Upload release archive to be used later by the deploy job    
-      - name: Upload release
-        if: github.event_name == 'release' && matrix.deploy==true
-        uses: actions/upload-artifact@master
-        with:
-          name: release
-          path: dist/release             
-
-  # This job deploys the native snapshot.
-  # The snapshot is downloaded when people build the engine without setting buildNativeProject
-  # this is useful for people that want to build only the java part and don't have
-  # all the stuff needed to compile natives.
-  DeploySnapshot:
-    needs: [BuildJMonkey]
-    name: "Deploy snapshot"
-    runs-on: ubuntu-18.04
-    if: github.event_name == 'push'
-    steps:
-
-      # We clone the repo manually, since we are going to push back a reference to the snapshot
-      - name: Clone the repo
-        run: |
-          branch="${GITHUB_REF//refs\/heads\//}"
-          if [ "$branch" != "" ];
-          then
-            git clone --single-branch --branch "$branch" https://github.com/${GITHUB_REPOSITORY}.git .
-          fi
-      
-      - name: Download merged natives
-        uses: actions/download-artifact@master
-        with:
-          name: natives
-          path: dist/
-
-      - name: Deploy natives snapshot
-        run: |
-          source .github/actions/tools/bintray.sh
-          NATIVE_CHANGES="yes"
-          branch="${GITHUB_REF//refs\/heads\//}"
-          if [ "$branch" != "" ];
-          then
-            if [ -f "natives-snapshot.properties" ];
-            then
-              nativeSnapshot=`cat "natives-snapshot.properties"`
-              nativeSnapshot="${nativeSnapshot#*=}"
-              
-              # We deploy ONLY if GITHUB_SHA (the current commit hash) is newer than $nativeSnapshot
-              if [ "`git rev-list --count $nativeSnapshot..$GITHUB_SHA`" = "0" ];
-              then
-                NATIVE_CHANGES=""
-              else
-                # We check if the native code changed.
-                echo "Detect changes"
-                NATIVE_CHANGES="$(git diff-tree --name-only "$GITHUB_SHA" "$nativeSnapshot" -- jme3-bullet-native/)"
-                if [ "$NATIVE_CHANGES" = "" ];then NATIVE_CHANGES="$(git diff-tree --name-only "$GITHUB_SHA" "$nativeSnapshot"  --  jme3-android-native/)"; fi
-                if [ "$NATIVE_CHANGES" = "" ];then NATIVE_CHANGES="$(git diff-tree --name-only "$GITHUB_SHA" "$nativeSnapshot"  --  jme3-bullet-native-android/)"; fi
-                if [ "$NATIVE_CHANGES" = "" ];then NATIVE_CHANGES="$(git diff-tree --name-only "$GITHUB_SHA" "$nativeSnapshot"  --  jme3-bullet/)"; fi
-                # The bulletUrl (in gradle.properties) might have changed.
-                if [ "$NATIVE_CHANGES" = "" ];then NATIVE_CHANGES="$(git diff-tree --name-only "$GITHUB_SHA" "$nativeSnapshot"  --  gradle.properties)"; fi
-              fi
-            fi
-
-            # We do nothing if there is no change
-            if [ "$NATIVE_CHANGES" = "" ];
-            then
-              echo "No changes, skip."
-            else
-              if [ "${{ secrets.BINTRAY_GENERIC_REPO }}" = "" ];
-              then               
-                echo "Configure the following secrets to enable native snapshot deployment"
-                echo "BINTRAY_GENERIC_REPO, BINTRAY_USER, BINTRAY_APIKEY"           
-              else
-                # Deploy snapshot
-                bintray_uploadFile dist/jme3-natives.zip \
-                  $GITHUB_SHA/$GITHUB_SHA/jme3-natives.zip \
-                  ${{ secrets.BINTRAY_GENERIC_REPO }} "content" "natives" \
-                  ${{ secrets.BINTRAY_USER }} \
-                  ${{ secrets.BINTRAY_APIKEY }}  \
-                  "https://github.com/${GITHUB_REPOSITORY}" \
-                  "${{ secrets.BINTRAY_LICENSE }}" "true"
-
-                # We reference the snapshot by writing its commit hash in  natives-snapshot.properties 
-                echo "natives.snapshot=$GITHUB_SHA" > natives-snapshot.properties
-                
-                # We commit the updated  natives-snapshot.properties
-                git config --global user.name "Github Actions"
-                git config --global user.email "actions@users.noreply.github.com"
-      
-                git add natives-snapshot.properties
-              
-                git commit -m "[skip ci] update natives snapshot"
-                
-                # Pull rebase from the remote repo, just in case there was a push in the meantime
-                git pull -q --rebase
-
-                # We need to calculate the header for git authentication
-                header=$(echo -n "ad-m:${{ secrets.GITHUB_TOKEN }}" | base64)
-
-                # Push
-                (git -c http.extraheader="AUTHORIZATION: basic $header" push origin "$branch" || true)
-              
-              fi
-            fi
-          fi
-
-  # This job deploys the release
-  DeployRelease:  
-    needs: [BuildJMonkey]
-    name: Deploy Release
-    runs-on: ubuntu-18.04
-    if: github.event_name == 'release'
-    steps:   
-    
-      # We need to clone everything again for uploadToMaven.sh ...
-      - name: Clone the repo
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 1
-    
-      # Download all the stuff...
-      - name: Download maven artifacts
-        uses: actions/download-artifact@master
-        with:
-          name: maven
-          path: dist/maven
-      
-      - name: Download release
-        uses: actions/download-artifact@master
-        with:
-          name: release
-          path: dist/release      
-      
-      - name: Deploy to github releases    
-        run: |
-          # We need to get the release id (yeah, it's not the same as the tag)
-          echo "${GITHUB_EVENT_PATH}"
-          cat ${GITHUB_EVENT_PATH}
-          releaseId=$(jq --raw-output '.release.id' ${GITHUB_EVENT_PATH})
-
-          # Now that we have the id, we just upload the release zip from before
-          echo "Upload to release $releaseId"
-          filename="$(ls dist/release/*.zip)"
-          url="https://uploads.github.com/repos/${GITHUB_REPOSITORY}/releases/$releaseId/assets?name=$(basename $filename)"
-          echo "Upload to $url"
-          curl -L \
-          -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
-          -H "Content-Type: application/zip" \
-          --data-binary @"$filename" \
-          "$url"
-            
-      - name: Deploy to bintray
-        run: |
-          source .github/actions/tools/uploadToMaven.sh
-          if [ "${{ secrets.BINTRAY_MAVEN_REPO }}" = "" ];
-          then
-            echo "Configure the following secrets to enable bintray deployment"
-            echo "BINTRAY_MAVEN_REPO, BINTRAY_USER, BINTRAY_APIKEY"
-          else
-            uploadAllToMaven dist/maven/ https://api.bintray.com/maven/${{ secrets.BINTRAY_MAVEN_REPO }} ${{ secrets.BINTRAY_USER }} ${{ secrets.BINTRAY_APIKEY }} "https://github.com/${GITHUB_REPOSITORY}" "${{ secrets.BINTRAY_LICENSE }}"
-          fi
-      
-      # - name: Deploy to github package registry
-      #   run: |
-      #     source .github/actions/tools/uploadToMaven.sh
-      #     registry="https://maven.pkg.github.com/$GITHUB_REPOSITORY"
-      #     echo "Deploy to github package registry $registry"
-      #     uploadAllToMaven dist/maven/ $registry "token" ${{ secrets.GITHUB_TOKEN }}
-          
-  # Deploy the javadoc
-  DeployJavaDoc:  
-    needs: [BuildJMonkey]
-    name: Deploy Javadoc
-    runs-on: ubuntu-18.04
-    if: github.event_name == 'release'
-    steps:   
-      
-      # We are going to need a deploy key for this, since we need
-      # to push to a different repo
-      - name: Set ssh key
-        run: |
-          mkdir -p ~/.ssh/
-          echo "${{ secrets.JAVADOC_GHPAGES_DEPLOY_PRIVKEY }}" > $HOME/.ssh/deploy.key
-          chmod 600 $HOME/.ssh/deploy.key
-
-      # We clone the javadoc repo
-      - name: Clone gh-pages
-        run: |
-          branch="gh-pages"
-          export GIT_SSH_COMMAND="ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i $HOME/.ssh/deploy.key"
-          git clone --single-branch --branch "$branch" git@github.com:${{ secrets.JAVADOC_GHPAGES_REPO }} .
-          
-      # Download the javadoc in the new directory "newdoc"
-      - name: Download javadoc
-        uses: actions/download-artifact@master
-        with:
-          name: javadoc
-          path: newdoc
-      
-      # The actual deploy
-      - name: Deploy to github pages    
-        run: |
-          set -f
-          IFS=$'\n'
-
-          # Get the tag for this release
-          version="`if [[ $GITHUB_REF == refs\/tags* ]]; then echo ${GITHUB_REF//refs\/tags\//}; fi`"
-
-          # If there is no tag, then we do nothing.
-          if [ "$version" != "" ];
-          then
-            echo "Deploy as $version"
-
-            # Remove any older version of the javadoc for this tag
-            if [ -d "$version" ];then rm -Rf "$version"; fi
-
-            # Rename newdoc with the version name
-            mv newdoc "$version"
-
-            # if there isn't an index.txt we create one (we need this to list the versions)
-            if [ ! -f "index.txt" ]; then echo "" > index.txt ; fi
-            index="`cat index.txt`"
-         
-            # Check if this version is already in index.txt
-            addNew=true
-            for v in $index; 
-            do
-              if [ "$v" = "$version" ];
-              then
-                echo "$v" "$version"
-                addNew=false
-                break
-              fi
-            done
-
-            # If not, we add it to the beginning
-            if [ "$addNew" = "true" ];
-            then
-              echo -e "$version\n$index" > index.txt
-              index="`cat index.txt`"
-            fi
-
-            # Regenerate the pages
-            chmod +x make.sh
-            ./make.sh
-
-            # Configure git to use the deploy key
-            export GIT_SSH_COMMAND="ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i $HOME/.ssh/deploy.key"
-
-            # Commit the changes
-            git config --global user.name "Github Actions"
-            git config --global user.email "actions@users.noreply.github.com"
-      
-            git add . || true
-            git commit -m "$version" || true
-
-            branch="gh-pages"                   
-            git push origin "$branch" --force || true
-
-          fi

.gitignore

@@ -33,7 +33,15 @@
 /jme3-android-native/OpenALSoft.zip
 /jme3-android-native/src/native/jme_decode/STBI/
 /jme3-android-native/src/native/jme_decode/Tremor/
+/jme3-android-native/src/native/jme_decode/com_jme3_audio_plugins_NativeVorbisFile.h
+/jme3-android-native/src/native/jme_decode/com_jme3_texture_plugins_AndroidNativeImageLoader.h
 /jme3-android-native/stb_image.h
+!/jme3-bullet-native/libs/native/windows/x86_64/bulletjme.dll
+!/jme3-bullet-native/libs/native/windows/x86/bulletjme.dll
+!/jme3-bullet-native/libs/native/osx/x86/libbulletjme.dylib
+!/jme3-bullet-native/libs/native/osx/x86_64/libbulletjme.dylib
+!/jme3-bullet-native/libs/native/linux/x86/libbulletjme.so
+!/jme3-bullet-native/libs/native/linux/x86_64/libbulletjme.so
 /jme3-examples/private/
 !/jme3-vr/src/main/resources/**/*.dylib
 !/jme3-vr/src/main/resources/**/*.so
@@ -41,8 +49,4 @@
 !/jme3-vr/src/main/resources/**/*.dll
 !/jme3-vr/src/main/resources/**/*.pdb
 /buildMaven.bat
-/private
+
-.travis.yml
-appveyor.yml
-javadoc_deploy
-javadoc_deploy.pub

.travis.yml

@@ -0,0 +1,86 @@
+language: java
+sudo: true
+
+branches:
+  only:
+  - master
+  - /^v3.3.*$/
+  - v3.2
+  - /^v3.2.*$/
+
+matrix:
+  include:
+  - os: linux
+    jdk: oraclejdk8
+    dist: precise
+    env: UPLOAD=true UPLOAD_NATIVE=true
+  - os: linux
+    jdk: openjdk11
+    dist: xenial
+  - os: osx
+    osx_image: xcode9.3
+    env: UPLOAD_NATIVE=true
+
+addons:
+  ssh_known_hosts: github.com
+  hosts:
+    - travisci
+  hostname: travisci
+  apt:
+    packages:
+    - gcc-multilib
+    - g++-multilib
+
+before_install:
+  - '[ -n "$UPLOAD" ] && git fetch --unshallow || :'
+
+before_cache:
+  - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
+  - rm -fr $HOME/.gradle/caches/*/plugin-resolution/
+
+cache:
+  directories:
+    - $HOME/.gradle/caches/
+    - $HOME/.gradle/wrapper/
+
+install:
+  - '[ -n "$UPLOAD_NATIVE" ] && ./gradlew -PbuildNativeProjects=true assemble || ./gradlew assemble'
+
+script:
+  - ./gradlew check
+
+after_success:
+  - '[ "$TRAVIS_PULL_REQUEST" == "false" ] && [ -n "$UPLOAD_NATIVE" ] && ./private/upload_native.sh || :'
+  - '[ -n "$TRAVIS_TAG" ] && [ "$TRAVIS_PULL_REQUEST" == "false" ] && [ -n "$UPLOAD" ] && ./gradlew bintrayUpload || :'
+
+notifications:
+  slack:
+    on_success: change
+    on_failure: always
+    rooms:
+      secure: "PWEk4+VL986c3gAjWp12nqyifvxCjBqKoESG9d7zWh1uiTLadTHhZJRMdsye36FCpz/c/Jt7zCRO/5y7FaubQptnRrkrRfjp5f99MJRzQVXnUAM+y385qVkXKRKd/PLpM7XPm4AvjvxHCyvzX2wamRvul/TekaXKB9Ti5FCN87s="
+
+before_deploy:
+  - ./gradlew createZipDistribution
+  - export RELEASE_DIST=$(ls build/distributions/*.zip)
+
+deploy:
+  provider: releases
+  api_key:
+    secure: PuEsJd6juXBH29ByITW3ntSAyrwWs0IeFvXJ5Y2YlhojhSMtTwkoWeB6YmDJWP4fhzbajk4TQ1HlOX2IxJXSW/8ShOEIUlGXz9fHiST0dkSM+iRAUgC5enCLW5ITPTiem7eY9ZhS9miIam7ngce9jHNMh75PTzZrEJtezoALT9w=
+  file_glob: true
+  file: "${RELEASE_DIST}"
+  skip_cleanup: true
+  on:
+    repo: jMonkeyEngine/jmonkeyengine
+    tags: true
+
+# before_install:
+  # required libs for android build tools
+  # sudo apt-get update
+  # sudo apt-get install -qq p7zip-full
+  # sudo apt-get install -qq --force-yes libgd2-xpm ia32-libs ia32-libs-multiarch
+  # newest Android NDK
+  # wget http://dl.google.com/android/ndk/android-ndk-r10c-linux-x86_64.bin -O ndk.bin
+  # 7z x ndk.bin -y > /dev/null
+  # export ANDROID_NDK=`pwd`/android-ndk-r10c

CONTRIBUTING.md

@@ -9,8 +9,6 @@ Communication always comes first. **All** code changes and other contributions s
 
 ### New Contributors
 
-Check out the [Projects](https://github.com/jMonkeyEngine/jmonkeyengine/projects/1) tab, where the team has prioritized issues that you as a new contributor can undertake that will familiarize you to the workflow of contributing. This highlights some issues the team thinks would be a good start for new contributors but you are free to contribute on any other issues or integration you wish.
-
 When you're ready to submit your code, just make a [pull request](https://help.github.com/articles/using-pull-requests).
 
 - Do not commit your code until you have received proper feedback.

LICENSE

@@ -1,29 +0,0 @@
-Copyright (c) 2009-2020 jMonkeyEngine
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-* Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-
-* Redistributions in binary form must reproduce the above copyright
-notice, this list of conditions and the following disclaimer in the
-documentation and/or other materials provided with the distribution.
-
-* Neither the name of 'jMonkeyEngine' nor the names of its contributors
-may be used to endorse or promote products derived from this software
-without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
-CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

@@ -1,7 +1,7 @@
-jMonkeyEngine
+jMonkeyEngine 
 =============
 
-[![Build Status](https://github.com/jMonkeyEngine/jmonkeyengine/workflows/Build%20jMonkeyEngine/badge.svg)](https://github.com/jMonkeyEngine/jmonkeyengine/actions)
+[![Build Status](https://travis-ci.org/jMonkeyEngine/jmonkeyengine.svg?branch=master)](https://travis-ci.org/jMonkeyEngine/jmonkeyengine)
 
 jMonkeyEngine is a 3-D game engine for adventurous Java developers. It’s open-source, cross-platform, and cutting-edge. 3.2.4 is the latest stable version of the jMonkeyEngine 3 SDK, a complete game development suite. We'll release 3.2.x updates until the major 3.3 release arrives.
 
@@ -11,18 +11,17 @@ The engine is used by several commercial game studios and computer-science cours
 
  - [jME powered games on IndieDB](http://www.indiedb.com/engines/jmonkeyengine/games)
  - [Maker's Tale](http://steamcommunity.com/sharedfiles/filedetails/?id=93461954t)
- - [Boardtastic 2](https://boardtastic-2.fileplanet.com/apk)
+ - [Boardtastic 2](https://play.google.com/store/apps/details?id=com.boardtastic.skateboarding)
- - [Attack of the Gelatinous Blob](https://attack-gelatinous-blob.softwareandgames.com/)
+ - [Copod](http://herebeben.com/copod)
+ - [Attack of the Gelatinous Blob](http://attackofthegelatinousblob.com/)
+ - [Chaos](http://4realms.net/)
  - [Mythruna](http://mythruna.com/)
- - [PirateHell (on Steam)](https://store.steampowered.com/app/321080/Pirate_Hell/)
+ - [PirateHell](http://www.desura.com/games/piratehell)
- - [3089 (on Steam)](http://store.steampowered.com/app/263360/)
+ - [3089 (on steam)](http://store.steampowered.com/app/263360/)
- - [3079 (on Steam)](http://store.steampowered.com/app/259620/)
+ - [3079 (on steam)](http://store.steampowered.com/app/259620/)
- - [Lightspeed Frontier (on Steam)](https://store.steampowered.com/app/548650/Lightspeed_Frontier/)
+ - [Lightspeed Frontier](https://store.steampowered.com/app/548650/Lightspeed_Frontier/)
  - [Skullstone](http://www.skullstonegame.com/)
- - [Spoxel (on Steam)](https://store.steampowered.com/app/746880/Spoxel/)
+ - [Spoxel](https://store.steampowered.com/app/746880/Spoxel/)
- - [Nine Circles of Hell (on Steam)](https://store.steampowered.com/app/1200600/Nine_Circles_of_Hell/)
- - [Leap](https://gamejolt.com/games/leap/313308)
- - [Jumping Jack Flag](http://timealias.bplaced.net/jack/)
 
 ## Getting started
 
@@ -37,8 +36,8 @@ Note: The master branch on GitHub is a development version of the engine and is
  - NetBeans Platform
  - Gradle
 
-Plus a bunch of awesome libraries & tight integrations like Bullet, NiftyGUI and other goodies.
+Plus a bunch of awesome libraries & tight integrations like Bullet, Blender, NiftyGUI and other goodies.
-
+ 
 ### Documentation
 
 Did you miss it? Don't sweat it, [here it is again](https://jmonkeyengine.github.io/wiki).

appveyor.yml

@@ -0,0 +1,63 @@
+version: 1.0.{build}.{branch}
+
+branches:
+  only:
+  - master
+  - v3.2
+
+only_commits:
+  files:
+    - jme3-bullet-native/
+    - appveyor.yml
+    - gradle.properties
+
+skip_tags: true
+
+max_jobs: 1
+
+clone_depth: 1
+
+image: Visual Studio 2013
+
+environment:
+  encrypted_f0a0b284e2e8_iv:
+    secure: aImQXs4g7zMXm1nWRvlh2wPK1UQvozS1fOVNthpyoEDFZ2FvBSdXqh5NPbGh44+F
+  encrypted_f0a0b284e2e8_key:
+    secure: Ek2lqC2e19qQDRRdlvnYyLFBq3TNj6YwKTAPuJ2VElJsxi9lQg+9ZP+VbP4kbHTx6Zaa++vtmOuxLZL7gdILrEEPa1Jix2BBLBfcxBUxe6w=
+
+install:
+- cmd: >-
+    set GRADLE_LOCK=C:\Users\appveyor\.gradle\caches\modules-2\modules-2.lock
+
+    if exist %GRADLE_LOCK% del %GRADLE_LOCK%
+
+build_script:
+  - cmd: gradlew.bat -PbuildNativeProjects=true :jme3-bullet-native:assemble
+
+cache:
+- C:\Users\appveyor\.gradle\caches
+- C:\Users\appveyor\.gradle\wrapper
+- jme3-bullet-native\bullet3.zip -> gradle.properties
+
+test: off
+deploy: off
+
+on_success:
+- cmd: >-
+    if not defined encrypted_f0a0b284e2e8_key appveyor exit
+
+    openssl aes-256-cbc -K %encrypted_f0a0b284e2e8_key% -iv %encrypted_f0a0b284e2e8_iv% -in private\key.enc -out c:\users\appveyor\.ssh\id_rsa -d
+
+    git config --global user.email "appveyor"
+
+    git config --global user.name "appveyor"
+
+    git checkout -q %APPVEYOR_REPO_BRANCH%
+
+    git add -- jme3-bullet-native/libs/native/windows/
+
+    git commit -m "[ci skip] bullet: update windows natives"
+
+    git pull -q --rebase
+
+    git push git@github.com:jMonkeyEngine/jmonkeyengine.git

build.gradle

@@ -1,6 +1,3 @@
-import java.nio.file.Files;
-import java.nio.file.StandardCopyOption;
-
 buildscript {
     repositories {
         google()
@@ -9,22 +6,12 @@ buildscript {
     dependencies {
         classpath 'com.android.tools.build:gradle:3.1.4'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
-        classpath 'me.tatarka:gradle-retrolambda:3.7.1'
-    }
-}
-
-allprojects {
-    repositories {
-        google()
-        jcenter()
     }
 }
 
 apply plugin: 'base'
 apply from: file('version.gradle')
 
-apply plugin: 'me.tatarka.retrolambda'
-
 // This is applied to all sub projects
 subprojects {
     if(!project.name.equals('jme3-android-examples')) {
@@ -115,8 +102,8 @@ task mergedJavadoc(type: Javadoc, description: 'Creates Javadoc from all the pro
     source subprojects.collect {project ->
         project.sourceSets*.allJava
     }
-    classpath = files(subprojects.collect {project ->
+//    classpath = files(subprojects.collect {project ->
-            project.sourceSets*.compileClasspath})
+//            project.sourceSets*.compileClasspath})
     //    source {
     //        subprojects*.sourceSets*.main*.allSource
     //    }
@@ -125,11 +112,6 @@ task mergedJavadoc(type: Javadoc, description: 'Creates Javadoc from all the pro
     }
 }
 
-clean.dependsOn('cleanMergedJavadoc')
-task cleanMergedJavadoc(type: Delete) {
-    delete file('dist/javadoc')
-}
-
 task mergedSource(type: Copy){
 
 }
@@ -159,62 +141,6 @@ task configureAndroidNDK {
     }
 }
 
-gradle.rootProject.ext.set("usePrebuildNatives", buildNativeProjects!="true");
-
-if (skipPrebuildLibraries != "true" && buildNativeProjects != "true") {
-    String rootPath = rootProject.projectDir.absolutePath
-
-    Properties nativesSnasphotProp = new Properties()
-    File nativesSnasphotPropF = new File("${rootPath}/natives-snapshot.properties");
-
-    if (nativesSnasphotPropF.exists()) {
-
-        nativesSnasphotPropF.withInputStream { nativesSnasphotProp.load(it) }
-
-        String nativesSnasphot = nativesSnasphotProp.getProperty("natives.snapshot");
-        String nativesUrl = PREBUILD_NATIVES_URL.replace('${natives.snapshot}', nativesSnasphot)
-        println "Use natives snapshot: " + nativesUrl
-
-        String nativesZipFile = "${rootPath}" + File.separator + "build" + File.separator + nativesSnasphot + "-natives.zip"
-        String nativesPath = "${rootPath}" + File.separator + "build" + File.separator + "native"
-
-
-        task getNativesZipFile {
-            outputs.file nativesZipFile
-            doFirst {
-                File target = file(nativesZipFile);
-                println("Download natives from " + nativesUrl + " to " + nativesZipFile);
-                target.getParentFile().mkdirs();
-                ant.get(src: nativesUrl, dest: target);
-            }
-        }
-
-        task extractPrebuiltNatives {
-            inputs.file nativesZipFile
-            outputs.dir nativesPath
-            dependsOn getNativesZipFile
-
-            doFirst {
-                for (File src : zipTree(nativesZipFile)) {
-                    String srcRel = src.getAbsolutePath().substring((int) (nativesZipFile.length() + 1));
-                    srcRel = srcRel.substring(srcRel.indexOf(File.separator) + 1);
-
-                    File dest = new File(nativesPath + File.separator + srcRel);
-                    boolean doCopy = !(dest.exists() && dest.lastModified() > src.lastModified())
-                    if (doCopy) {
-                        println("Copy " + src + " " + dest);
-                        dest.getParentFile().mkdirs();
-                        Files.copy(src.toPath(), dest.toPath(), StandardCopyOption.REPLACE_EXISTING);
-                    }
-                }
-            }
-        }
-
-        assemble.dependsOn extractPrebuiltNatives
-    }
-}
-
-
 //class IncrementalReverseTask extends DefaultTask {
 //    @InputDirectory
 //    def File inputDir
@@ -250,14 +176,3 @@ if (skipPrebuildLibraries != "true" && buildNativeProjects != "true") {
 //        enableAssertions = true // true by default
 //    }
 //}
-
-wrapper {
-    gradleVersion = '5.6.4'
-}
-
-
-retrolambda {
-  javaVersion JavaVersion.VERSION_1_7
-  incremental true
-    jvmArgs '-noverify'
-}

common-android-app.gradle

@@ -1,7 +1,7 @@
 apply plugin: 'com.android.application'
 
 group   = 'org.jmonkeyengine'
-version = jmeFullVersion
+version = jmeVersion + '-' + jmeVersionTag
 
 sourceCompatibility = '1.6'
 

common.gradle

@@ -3,21 +3,14 @@
 //
 
 apply plugin: 'java'
-apply plugin: 'groovy'
 apply plugin: 'maven'
 
 group = 'org.jmonkeyengine'
-version = jmeFullVersion
+version = jmePomVersion
 
 sourceCompatibility = '1.8'
 [compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
 
-gradle.projectsEvaluated {
-    tasks.withType(JavaCompile) { // compile-time options:
-        options.compilerArgs << '-Xlint:unchecked'
-    }
-}
-
 repositories {
     mavenCentral()
     maven {
@@ -31,21 +24,9 @@ repositories {
 dependencies {
     // Adding dependencies here will add the dependencies to each subproject.
     testCompile group: 'junit', name: 'junit', version: '4.12'
-    testCompile group: 'org.mockito', name: 'mockito-core', version: '3.0.0'
+    testCompile group: 'org.mockito', name: 'mockito-core', version: '1.10.19'
     testCompile group: 'org.easytesting', name: 'fest-assert-core', version: '2.0M10'
-    testCompile 'org.codehaus.groovy:groovy-all:2.5.8'
-}
-
-
-// Uncomment if you want to see the status of every test that is run and
-// the test output.
-/*
-test {
-    testLogging {
-        events "passed", "skipped", "failed", "standardOut", "standardError"
-    }
 }
-*/
 
 jar {
     manifest {
@@ -57,9 +38,9 @@ jar {
 javadoc {
     failOnError = false
     options.memberLevel = org.gradle.external.javadoc.JavadocMemberLevel.PROTECTED
-    options.docTitle = "jMonkeyEngine ${jmeFullVersion} ${project.name} Javadoc"
+    options.docTitle = "jMonkeyEngine ${jmeMainVersion} ${project.name} Javadoc"
-    options.windowTitle = "jMonkeyEngine ${jmeFullVersion} ${project.name} Javadoc"
+    options.windowTitle = "jMonkeyEngine ${jmeMainVersion} ${project.name} Javadoc"
-    options.header = "<b>jMonkeyEngine ${jmeFullVersion} ${project.name}</b>"
+    options.header = "<b>jMonkeyEngine ${jmeMainVersion} ${project.name}</b>"
     options.author = "true"
     options.use = "true"
     options.charSet = "UTF-8"

gradle.properties

@@ -1,16 +1,11 @@
-# Version number: Major.Minor.SubMinor (e.g. 3.3.0)
+# Version number used for plugins, only 3 numbers (e.g. 3.1.3)
-jmeVersion = 3.4.0
+jmeVersion = 3.3.0
-
+# Version used for application and settings folder, no spaces!
-# Leave empty to autogenerate
+jmeMainVersion = 3.3
-# (use -PjmeVersionName="myVersion" from commandline to specify a custom version name )
+# Version addition pre-alpha-svn, Stable, Beta
-jmeVersionName =
+jmeVersionTag = SNAPSHOT
-
+# Increment this each time jmeVersionTag changes but jmeVersion stays the same
-# If true, the version name will contain the commit hash
+jmeVersionTagID = 2
-useCommitHashAsVersionName = false
-
-# Set to true if a non-master branch name should be included in the automatically
-# generated version.
-includeBranchInVersion = false
 
 # specify if JavaDoc should be built
 buildJavaDoc = true
@@ -19,22 +14,18 @@ buildJavaDoc = true
 buildNativeProjects = false
 buildAndroidExamples = false
 
-buildForPlatforms = Linux64,Linux32,Windows64,Windows32,Mac64
-# Forcefully ignore prebuilt libraries
-skipPrebuildLibraries=false
 # Path to android NDK for building native libraries
 #ndkPath=/Users/normenhansen/Documents/Code-Import/android-ndk-r7
 ndkPath = /opt/android-ndk-r16b
 
 # Path for downloading native Bullet
-# 2.89+ (circa 26 April 2020, to avoid jMonkeyEngine issue #1283)
+bulletUrl = https://github.com/bulletphysics/bullet3/archive/2.87.zip
-bulletUrl = https://github.com/bulletphysics/bullet3/archive/cd8cf7521cbb8b7808126a6adebd47bb83ea166a.zip
+bulletFolder = bullet3-2.87
-bulletFolder = bullet3-cd8cf7521cbb8b7808126a6adebd47bb83ea166a
 bulletZipFile = bullet3.zip
 
 # POM settings
 POM_NAME=jMonkeyEngine
-POM_DESCRIPTION=jMonkeyEngine is a 3-D game engine for adventurous Java developers
+POM_DESCRIPTION=jMonkeyEngine is a 3D game engine for adventurous Java developers
 POM_URL=http://jmonkeyengine.org
 POM_SCM_URL=https://github.com/jMonkeyEngine/jmonkeyengine
 POM_SCM_CONNECTION=scm:git:git://github.com/jMonkeyEngine/jmonkeyengine.git
@@ -48,4 +39,3 @@ POM_INCEPTION_YEAR=2009
 bintray_user=
 bintray_api_key=
 
-PREBUILD_NATIVES_URL=https://dl.bintray.com/jmonkeyengine/files/${natives.snapshot}/jme3-natives.zip

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
-distributionBase=GRADLE_USER_HOME
+distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
+distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-bin.zip
+zipStoreBase=GRADLE_USER_HOME
-zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
-zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10-bin.zip

gradlew

@@ -1,21 +1,5 @@
 #!/usr/bin/env sh
 
-#
-# Copyright 2015 the original author or authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -44,7 +28,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+DEFAULT_JVM_OPTS=""
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -125,8 +109,8 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin or MSYS, switch paths to Windows format before running java
+# For Cygwin, switch paths to Windows format before running java
-if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+if $cygwin ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
     JAVACMD=`cygpath --unix "$JAVACMD"`

gradlew.bat

@@ -1,19 +1,3 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -30,7 +14,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+set DEFAULT_JVM_OPTS=
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome

jme3-android-examples/build.gradle

@@ -1,8 +1,8 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 23
-    buildToolsVersion "28.0.3"
+    buildToolsVersion "23.0.3"
 
     lintOptions {
         // Fix nifty gui referencing "java.awt" package.
@@ -13,7 +13,7 @@ android {
     defaultConfig {
         applicationId "org.jmonkeyengine.jme3androidexamples"
         minSdkVersion 15       // Android 4.0.3 ICE CREAM SANDWICH
-        targetSdkVersion 28    // Android 9 PIE
+        targetSdkVersion 22    // Android 5.1 LOLLIPOP
         versionCode 1
         versionName "1.0" // TODO: from settings.gradle
     }
@@ -25,11 +25,6 @@ android {
         }
     }
 
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
-
     sourceSets {
         main {
             java {
@@ -47,7 +42,7 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:28.0.0'
+    compile 'com.android.support:appcompat-v7:23.3.0'
 
     compile project(':jme3-core')
     compile project(':jme3-android')

jme3-android-examples/src/main/java/org/jmonkeyengine/jme3androidexamples/JmeFragment.java

@@ -62,15 +62,15 @@ public class JmeFragment extends AndroidHarnessFragment {
     public void onCreate(Bundle savedInstanceState) {
         Bundle bundle=getArguments();
 
-        appClass = bundle.getString(MainActivity.SELECTED_APP_CLASS);
+        appClass = bundle.getString(SELECTED_APP_CLASS);
 //        Log.d(this.getClass().getSimpleName(), "AppClass: " + appClass);
-        joystickEventsEnabled = bundle.getBoolean(MainActivity.ENABLE_JOYSTICK_EVENTS);
+        joystickEventsEnabled = bundle.getBoolean(ENABLE_JOYSTICK_EVENTS);
 //        Log.d(this.getClass().getSimpleName(), "JoystickEventsEnabled: " + joystickEventsEnabled);
-        keyEventsEnabled = bundle.getBoolean(MainActivity.ENABLE_KEY_EVENTS);
+        keyEventsEnabled = bundle.getBoolean(ENABLE_KEY_EVENTS);
 //        Log.d(this.getClass().getSimpleName(), "KeyEventsEnabled: " + keyEventsEnabled);
-        mouseEventsEnabled = bundle.getBoolean(MainActivity.ENABLE_MOUSE_EVENTS);
+        mouseEventsEnabled = bundle.getBoolean(ENABLE_MOUSE_EVENTS);
 //        Log.d(this.getClass().getSimpleName(), "MouseEventsEnabled: " + mouseEventsEnabled);
-        boolean verboseLogging = bundle.getBoolean(MainActivity.VERBOSE_LOGGING);
+        boolean verboseLogging = bundle.getBoolean(VERBOSE_LOGGING);
 //        Log.d(this.getClass().getSimpleName(), "VerboseLogging: " + verboseLogging);
         if (verboseLogging) {
             // Set the default logging level (default=Level.INFO, Level.ALL=All Debug Info)

jme3-android-examples/src/main/java/org/jmonkeyengine/jme3androidexamples/MainActivity.java

@@ -286,7 +286,7 @@ public class MainActivity extends AppCompatActivity implements OnItemClickListen
     private boolean checkClassType(String className) {
         boolean include = true;
         try {
-            Class<?> clazz = Class.forName(className);
+            Class<?> clazz = (Class<?>) Class.forName(className);
             if (Application.class.isAssignableFrom(clazz)) {
                 Log.d(TAG, "Class " + className + " is a jME Application");
             } else {

jme3-android-native/.gitignore

@@ -1,2 +0,0 @@
-# The headers are autogenerated and nobody should try to commit them...
-src/native/headers

jme3-android-native/build.gradle

@@ -46,4 +46,4 @@ ext {
 apply from: file('openalsoft.gradle')
 // apply from: file('stb_image.gradle')
 // apply from: file('tremor.gradle')
-apply from: file('decode.gradle')
+apply from: file('decode.gradle')

jme3-android-native/decode.gradle

@@ -1,5 +1,5 @@
 String tremorZipFile = "TremorAndroid.zip"
-String stbiUrl = 'https://raw.githubusercontent.com/jMonkeyEngine/stb/0224a44a10564a214595797b4c88323f79a5f934/stb_image.h'
+String stbiUrl = 'https://raw.githubusercontent.com/nothings/stb/master/stb_image.h'
 
 // Working directories for the ndk build.
 String decodeBuildDir = "${buildDir}" + File.separator + 'decode'
@@ -8,12 +8,10 @@ String decodeBuildJniDir = decodeBuildDir + File.separator + 'jni'
 String decodeBuildLibsDir = decodeBuildDir + File.separator + 'libs'
 
 // Pre-compiled libs directory
-def rootPath = rootProject.projectDir.absolutePath
+String decodePreCompiledLibsDir = 'libs' + File.separator + 'decode'
-String decodePreCompiledLibsDir = rootPath + File.separator + 'build' + File.separator + 'native' + File.separator +  'android' + File.separator + 'decode'
 
 // jME Android Native source files path
 String decodeSourceDir = 'src/native/jme_decode'
-String jmeHeaders = 'src/native/headers'
 
 task downloadStbImage(type: MyDownload) {
     sourceUrl = stbiUrl
@@ -47,13 +45,24 @@ task copyTremorFiles(type: Copy) {
     into outputDir
 }
 
-task copyJmeHeadersDecode(type: Copy) {
+// Generate headers via javac -h
-    from file(jmeHeaders)
+task generateJavahHeaders(type: Exec) {
-    into file(decodeBuildJniDir + File.separator + "headers")
+    def files0 = fileTree("src/main/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files1 = fileTree("src/common/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files2 = fileTree("../jme3-core/src/main/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files3 = fileTree("../jme3-core/src/plugins/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files4 = fileTree("../jme3-core/src/tools/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files5 = fileTree("../jme3-terrain/src/main/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def filesList = "\"" + files0.join("\"\n\"") + "\"\n\"" + files1.join("\"\n\"") + "\"\n\"" + files2.join("\"\n\"") + "\"\n\"" + files3.join("\"\n\"") + "\"\n\"" + files4.join("\"\n\"") + "\"\n\"" + files5.join("\"\n\"") + "\""
+	new File("$projectDir/java_classes.jtxt").text = filesList.replaceAll(java.util.regex.Pattern.quote("\\"), java.util.regex.Matcher.quoteReplacement("/"))
+    executable org.gradle.internal.jvm.Jvm.current().getExecutable('javac')
+    args '-h', decodeSourceDir
+    args "@$projectDir/java_classes.jtxt"
+    args '-d', decodeClassesBuildDir
 }
 
 // Copy jME Android native files to jni directory
-task copySourceToBuild(type: Copy, dependsOn:[copyTremorFiles, copyStbiFiles, copyJmeHeadersDecode]) {
+task copySourceToBuild(type: Copy, dependsOn:[copyTremorFiles, copyStbiFiles, generateJavahHeaders]) {
     def sourceDir = file(decodeSourceDir)
     def outputDir = file(decodeBuildJniDir)
 

jme3-android-native/openalsoft.gradle

@@ -1,11 +1,11 @@
 // OpenAL Soft r1.16
-String openALSoftUrl = 'https://github.com/jMonkeyEngine/openal-soft/archive/e5016f814a265ed592a88acea95cf912c4bfdf12.zip'
+String openALSoftUrl = 'http://repo.or.cz/w/openal-soft.git/snapshot/e5016f814a265ed592a88acea95cf912c4bfdf12.zip'
 String openALSoftZipFile = 'OpenALSoft.zip'
 
 // OpenAL Soft directory the download is extracted into
 // Typically, the downloaded OpenAL Soft zip file will extract to a directory
 // called "openal-soft"
-String openALSoftFolder = 'openal-soft-e5016f814a265ed592a88acea95cf912c4bfdf12'
+String openALSoftFolder = 'openal-soft-e5016f8'
 
 //Working directories for the ndk build.
 String openalsoftBuildDir = "${buildDir}" + File.separator + 'openalsoft'
@@ -14,12 +14,10 @@ String openalsoftBuildJniDir = openalsoftBuildDir + File.separator + 'jni'
 String openalsoftBuildLibsDir = openalsoftBuildDir + File.separator + 'libs'
 
 //Pre-compiled libs directory
-def rootPath = rootProject.projectDir.absolutePath
+String openalsoftPreCompiledLibsDir = 'libs' + File.separator + 'openalsoft'
-String openalsoftPreCompiledLibsDir = rootPath + File.separator + 'build' + File.separator + 'native' + File.separator +  'android' + File.separator + 'openalsoft'
 
 // jME Android Native source files path
 String openalsoftJmeAndroidPath = 'src/native/jme_openalsoft'
-String jmeHeaders = 'src/native/headers'
 
 // Download external source files if not available
 task downloadOpenALSoft(type: MyDownload) {
@@ -64,14 +62,8 @@ copyOpenALSoft.dependsOn {
     }
 }
 
-// Copy JME Headers to jni directory
-task copyJmeHeadersOpenAL(type: Copy) {
-    from file(jmeHeaders)
-    into file(openalsoftBuildJniDir + File.separator + "headers")
-}
-
 // Copy jME Android native files to jni directory
-task copyJmeOpenALSoft(type: Copy, dependsOn: [copyOpenALSoft, copyJmeHeadersOpenAL]) {
+task copyJmeOpenALSoft(type: Copy, dependsOn:copyOpenALSoft) {
     def sourceDir = file(openalsoftJmeAndroidPath)
     def outputDir = file(openalsoftBuildJniDir)
 //    println "copyJmeOpenALSoft sourceDir: " + sourceDir
@@ -81,7 +73,22 @@ task copyJmeOpenALSoft(type: Copy, dependsOn: [copyOpenALSoft, copyJmeHeadersOpe
     into outputDir
 }
 
-task buildOpenAlSoftNativeLib(type: Exec, dependsOn: copyJmeOpenALSoft) {
+task generateOpenAlSoftHeaders(type:Exec, dependsOn: copyJmeOpenALSoft) {
+    def files0 = fileTree("src/main/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files1 = fileTree("src/common/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files2 = fileTree("../jme3-core/src/main/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files3 = fileTree("../jme3-core/src/plugins/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files4 = fileTree("../jme3-core/src/tools/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def files5 = fileTree("../jme3-terrain/src/main/java/").filter { it.isFile() && it.getName().endsWith(".java") }.files
+    def filesList = "\"" + files0.join("\"\n\"") + "\"\n\"" + files1.join("\"\n\"") + "\"\n\"" + files2.join("\"\n\"") + "\"\n\"" + files3.join("\"\n\"") + "\"\n\"" + files4.join("\"\n\"") + "\"\n\"" + files5.join("\"\n\"") + "\""
+	new File("$projectDir/java_classes.jtxt").text = filesList.replaceAll(java.util.regex.Pattern.quote("\\"), java.util.regex.Matcher.quoteReplacement("/"))
+    executable org.gradle.internal.jvm.Jvm.current().getExecutable('javac')
+    args '-h', openalsoftJmeAndroidPath
+    args "@$projectDir/java_classes.jtxt"
+    args '-d', openalsoftClassesBuildDir
+}
+
+task buildOpenAlSoftNativeLib(type: Exec, dependsOn: generateOpenAlSoftHeaders) {
 //    println "openalsoft build dir: " + openalsoftBuildDir
 //    println "ndkCommandPath: " + project.ndkCommandPath
     workingDir openalsoftBuildDir

jme3-android-native/src/native/jme_decode/com_jme3_audio_plugins_NativeVorbisFile.c

@@ -4,7 +4,7 @@
 
 #include "Tremor/ivorbisfile.h"
 
-#include "../headers/com_jme3_audio_plugins_NativeVorbisFile.h"
+#include "com_jme3_audio_plugins_NativeVorbisFile.h"
 
 #ifndef NDEBUG
 #include <android/log.h>
@@ -345,4 +345,4 @@ JNIEXPORT void JNICALL Java_com_jme3_audio_plugins_NativeVorbisFile_close
     free(wrapper);
     free(ovf);
     (*env)->SetObjectField(env, nvf, nvf_field_ovf, NULL);
-}
+}

jme3-android-native/src/native/jme_decode/com_jme3_texture_plugins_AndroidNativeImageLoader.c

@@ -1,4 +1,4 @@
-#include "../headers/com_jme3_texture_plugins_AndroidNativeImageLoader.h"
+#include "com_jme3_texture_plugins_AndroidNativeImageLoader.h"
 #include <assert.h>
 
 #ifndef NDEBUG

jme3-android-native/src/native/jme_openalsoft/com_jme3_audio_android_AndroidAL.c

@@ -1,4 +1,4 @@
-#include "../headers/com_jme3_audio_android_AndroidAL.h"
+#include "com_jme3_audio_android_AndroidAL.h"
 #include "AL/al.h"
 #include "AL/alext.h"
 

jme3-android-native/src/native/jme_openalsoft/com_jme3_audio_android_AndroidAL.h

@@ -0,0 +1,173 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class com_jme3_audio_android_AndroidAL */
+
+#ifndef _Included_com_jme3_audio_android_AndroidAL
+#define _Included_com_jme3_audio_android_AndroidAL
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alGetString
+ * Signature: (I)Ljava/lang/String;
+ */
+JNIEXPORT jstring JNICALL Java_com_jme3_audio_android_AndroidAL_alGetString
+  (JNIEnv *, jobject, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alGenSources
+ * Signature: ()I
+ */
+JNIEXPORT jint JNICALL Java_com_jme3_audio_android_AndroidAL_alGenSources
+  (JNIEnv *, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alGetError
+ * Signature: ()I
+ */
+JNIEXPORT jint JNICALL Java_com_jme3_audio_android_AndroidAL_alGetError
+  (JNIEnv *, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alDeleteSources
+ * Signature: (ILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alDeleteSources
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alGenBuffers
+ * Signature: (ILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alGenBuffers
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alDeleteBuffers
+ * Signature: (ILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alDeleteBuffers
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alSourceStop
+ * Signature: (I)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alSourceStop
+  (JNIEnv *, jobject, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alSourcei
+ * Signature: (III)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alSourcei
+  (JNIEnv *, jobject, jint, jint, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alBufferData
+ * Signature: (IILjava/nio/ByteBuffer;II)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alBufferData
+  (JNIEnv *, jobject, jint, jint, jobject, jint, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alSourcePlay
+ * Signature: (I)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alSourcePlay
+  (JNIEnv *, jobject, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alSourcePause
+ * Signature: (I)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alSourcePause
+  (JNIEnv *, jobject, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alSourcef
+ * Signature: (IIF)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alSourcef
+  (JNIEnv *, jobject, jint, jint, jfloat);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alSource3f
+ * Signature: (IIFFF)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alSource3f
+  (JNIEnv *, jobject, jint, jint, jfloat, jfloat, jfloat);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alGetSourcei
+ * Signature: (II)I
+ */
+JNIEXPORT jint JNICALL Java_com_jme3_audio_android_AndroidAL_alGetSourcei
+  (JNIEnv *, jobject, jint, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alSourceUnqueueBuffers
+ * Signature: (IILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alSourceUnqueueBuffers
+  (JNIEnv *, jobject, jint, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alSourceQueueBuffers
+ * Signature: (IILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alSourceQueueBuffers
+  (JNIEnv *, jobject, jint, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alListener
+ * Signature: (ILjava/nio/FloatBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alListener
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alListenerf
+ * Signature: (IF)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alListenerf
+  (JNIEnv *, jobject, jint, jfloat);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alListener3f
+ * Signature: (IFFF)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alListener3f
+  (JNIEnv *, jobject, jint, jfloat, jfloat, jfloat);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidAL
+ * Method:    alSource3i
+ * Signature: (IIIII)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidAL_alSource3i
+  (JNIEnv *, jobject, jint, jint, jint, jint, jint);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

jme3-android-native/src/native/jme_openalsoft/com_jme3_audio_android_AndroidALC.c

@@ -1,5 +1,5 @@
 #include "util.h"
-#include "../headers/com_jme3_audio_android_AndroidALC.h"
+#include "com_jme3_audio_android_AndroidALC.h"
 #include "AL/alc.h"
 #include "AL/alext.h"
 
@@ -171,4 +171,4 @@ JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidALC_alcDeviceResumeSOF
     if (device == NULL) return;
     
     alcDeviceResumeSOFT(device);
-}
+}

jme3-android-native/src/native/jme_openalsoft/com_jme3_audio_android_AndroidALC.h

@@ -0,0 +1,77 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class com_jme3_audio_android_AndroidALC */
+
+#ifndef _Included_com_jme3_audio_android_AndroidALC
+#define _Included_com_jme3_audio_android_AndroidALC
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     com_jme3_audio_android_AndroidALC
+ * Method:    createALC
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidALC_createALC
+  (JNIEnv *, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidALC
+ * Method:    destroyALC
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidALC_destroyALC
+  (JNIEnv *, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidALC
+ * Method:    isCreated
+ * Signature: ()Z
+ */
+JNIEXPORT jboolean JNICALL Java_com_jme3_audio_android_AndroidALC_isCreated
+  (JNIEnv *, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidALC
+ * Method:    alcGetString
+ * Signature: (I)Ljava/lang/String;
+ */
+JNIEXPORT jstring JNICALL Java_com_jme3_audio_android_AndroidALC_alcGetString
+  (JNIEnv *, jobject, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidALC
+ * Method:    alcIsExtensionPresent
+ * Signature: (Ljava/lang/String;)Z
+ */
+JNIEXPORT jboolean JNICALL Java_com_jme3_audio_android_AndroidALC_alcIsExtensionPresent
+  (JNIEnv *, jobject, jstring);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidALC
+ * Method:    alcGetInteger
+ * Signature: (ILjava/nio/IntBuffer;I)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidALC_alcGetInteger
+  (JNIEnv *, jobject, jint, jobject, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidALC
+ * Method:    alcDevicePauseSOFT
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidALC_alcDevicePauseSOFT
+  (JNIEnv *, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidALC
+ * Method:    alcDeviceResumeSOFT
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidALC_alcDeviceResumeSOFT
+  (JNIEnv *, jobject);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

jme3-android-native/src/native/jme_openalsoft/com_jme3_audio_android_AndroidEFX.c

@@ -1,5 +1,5 @@
 #include "util.h"
-#include "../headers/com_jme3_audio_android_AndroidEFX.h"
+#include "com_jme3_audio_android_AndroidEFX.h"
 #include "AL/alext.h"
 
 JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alGenAuxiliaryEffectSlots
@@ -72,4 +72,4 @@ JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alEffectf
   (JNIEnv* env, jobject obj, jint effect, jint param, jfloat value)
 {
     alEffectf((ALuint)effect, (ALenum)param, (ALfloat)value);
-}
+}

jme3-android-native/src/native/jme_openalsoft/com_jme3_audio_android_AndroidEFX.h

@@ -0,0 +1,101 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class com_jme3_audio_android_AndroidEFX */
+
+#ifndef _Included_com_jme3_audio_android_AndroidEFX
+#define _Included_com_jme3_audio_android_AndroidEFX
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alGenAuxiliaryEffectSlots
+ * Signature: (ILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alGenAuxiliaryEffectSlots
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alGenEffects
+ * Signature: (ILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alGenEffects
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alEffecti
+ * Signature: (III)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alEffecti
+  (JNIEnv *, jobject, jint, jint, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alAuxiliaryEffectSloti
+ * Signature: (III)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alAuxiliaryEffectSloti
+  (JNIEnv *, jobject, jint, jint, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alDeleteEffects
+ * Signature: (ILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alDeleteEffects
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alDeleteAuxiliaryEffectSlots
+ * Signature: (ILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alDeleteAuxiliaryEffectSlots
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alGenFilters
+ * Signature: (ILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alGenFilters
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alFilteri
+ * Signature: (III)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alFilteri
+  (JNIEnv *, jobject, jint, jint, jint);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alFilterf
+ * Signature: (IIF)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alFilterf
+  (JNIEnv *, jobject, jint, jint, jfloat);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alDeleteFilters
+ * Signature: (ILjava/nio/IntBuffer;)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alDeleteFilters
+  (JNIEnv *, jobject, jint, jobject);
+
+/*
+ * Class:     com_jme3_audio_android_AndroidEFX
+ * Method:    alEffectf
+ * Signature: (IIF)V
+ */
+JNIEXPORT void JNICALL Java_com_jme3_audio_android_AndroidEFX_alEffectf
+  (JNIEnv *, jobject, jint, jint, jfloat);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

jme3-android/build.gradle

@@ -1,5 +1,3 @@
-apply plugin: 'java'
-
 if (!hasProperty('mainClass')) {
     ext.mainClass = ''
 }
@@ -9,8 +7,3 @@ dependencies {
     compile project(':jme3-plugins')
     compileOnly 'android:android'
 }
-
-compileJava {
-    // The Android-Native Project requires the jni headers to be generated, so we do that here
-    options.compilerArgs += ["-h", "${project.rootDir}/jme3-android-native/src/native/headers"]
-}

jme3-android/src/main/java/com/jme3/app/AndroidHarness.java

@@ -239,8 +239,9 @@ public class AndroidHarness extends Activity implements TouchListener, DialogInt
             // Create application instance
             try {
                 if (app == null) {
-                    Class clazz = Class.forName(appClass);
+                    @SuppressWarnings("unchecked")
-                    app = (LegacyApplication)clazz.newInstance();
+                    Class<? extends LegacyApplication> clazz = (Class<? extends LegacyApplication>) Class.forName(appClass);
+                    app = clazz.newInstance();
                 }
 
                 app.setSettings(settings);
@@ -361,7 +362,6 @@ public class AndroidHarness extends Activity implements TouchListener, DialogInt
      * @param dialog
      * @param whichButton
      */
-    @Override
     public void onClick(DialogInterface dialog, int whichButton) {
         if (whichButton != -2) {
             if (app != null) {
@@ -473,7 +473,6 @@ public class AndroidHarness extends Activity implements TouchListener, DialogInt
         handler.setLevel(Level.ALL);
     }
 
-    @Override
     public void initialize() {
         app.initialize();
         if (handleExitHook) {
@@ -489,12 +488,10 @@ public class AndroidHarness extends Activity implements TouchListener, DialogInt
         }
     }
 
-    @Override
     public void reshape(int width, int height) {
         app.reshape(width, height);
     }
 
-    @Override
     public void update() {
         app.update();
         // call to remove the splash screen, if present.
@@ -506,12 +503,10 @@ public class AndroidHarness extends Activity implements TouchListener, DialogInt
         }
     }
 
-    @Override
     public void requestClose(boolean esc) {
         app.requestClose(esc);
     }
 
-    @Override
     public void destroy() {
         if (app != null) {
             app.destroy();
@@ -521,7 +516,6 @@ public class AndroidHarness extends Activity implements TouchListener, DialogInt
         }
     }
 
-    @Override
     public void gainFocus() {
         logger.fine("gainFocus");
         if (view != null) {
@@ -553,7 +547,6 @@ public class AndroidHarness extends Activity implements TouchListener, DialogInt
         }
     }
 
-    @Override
     public void loseFocus() {
         logger.fine("loseFocus");
         if (app != null) {

jme3-android/src/main/java/com/jme3/app/AndroidHarnessFragment.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2019 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -257,8 +257,9 @@ public class AndroidHarnessFragment extends Fragment implements
         // Create application instance
         try {
             if (app == null) {
-                Class clazz = Class.forName(appClass);
+                @SuppressWarnings("unchecked")
-                app = (LegacyApplication)clazz.newInstance();
+                Class<? extends LegacyApplication> clazz = (Class<? extends LegacyApplication>) Class.forName(appClass);
+                app = clazz.newInstance();
             }
 
             app.setSettings(settings);
@@ -683,10 +684,10 @@ public class AndroidHarnessFragment extends Fragment implements
                     if (viewWidth > viewHeight && viewWidth > maxResolutionDimension) {
                         // landscape
                         fixedSizeWidth = maxResolutionDimension;
-                        fixedSizeHeight = (int)(maxResolutionDimension * (viewHeight / (float)viewWidth));
+                        fixedSizeHeight = (int)(maxResolutionDimension * ((float)viewHeight / (float)viewWidth));
                     } else if (viewHeight > viewWidth && viewHeight > maxResolutionDimension) {
                         // portrait
-                        fixedSizeWidth = (int)(maxResolutionDimension * (viewWidth / (float)viewHeight));
+                        fixedSizeWidth = (int)(maxResolutionDimension * ((float)viewWidth / (float)viewHeight));
                         fixedSizeHeight = maxResolutionDimension;
                     } else if (viewWidth == viewHeight && viewWidth > maxResolutionDimension) {
                         fixedSizeWidth = maxResolutionDimension;

jme3-android/src/main/java/com/jme3/app/DefaultAndroidProfiler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2020 jMonkeyEngine
+ * Copyright (c) 2014 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -82,7 +82,6 @@ import com.jme3.renderer.queue.RenderQueue;
 public class DefaultAndroidProfiler implements AppProfiler {
     private int androidApiLevel = Build.VERSION.SDK_INT;
 
-    @Override
     public void appStep(AppStep appStep) {
         if (androidApiLevel >= 18) {
             switch(appStep) {
@@ -141,7 +140,6 @@ public class DefaultAndroidProfiler implements AppProfiler {
 
     }
 
-    @Override
     public void vpStep(VpStep vpStep, ViewPort vp, RenderQueue.Bucket bucket) {
         if (androidApiLevel >= 18) {
             switch (vpStep) {

jme3-android/src/main/java/com/jme3/app/state/MjpegFileWriter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2012 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -478,7 +478,7 @@ public class MjpegFileWriter {
             baos.write(fcc);
             baos.write(intBytes(swapInt(cb)));
             for (int i = 0; i < ind.size(); i++) {
-                AVIIndex in = ind.get(i);
+                AVIIndex in = (AVIIndex) ind.get(i);
                 baos.write(in.toBytes());
             }
 

jme3-android/src/main/java/com/jme3/app/state/VideoRecorderAppState.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2019 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -73,7 +73,6 @@ public class VideoRecorderAppState extends AbstractAppState {
     private Application app;
     private ExecutorService executor = Executors.newCachedThreadPool(new ThreadFactory() {
 
-        @Override
         public Thread newThread(Runnable r) {
             Thread th = new Thread(r);
             th.setName("jME3 Video Processor");
@@ -240,7 +239,6 @@ public class VideoRecorderAppState extends AbstractAppState {
                 renderer.readFrameBufferWithFormat(out, item.buffer, Image.Format.BGRA8);
                 executor.submit(new Callable<Void>() {
 
-                    @Override
                     public Void call() throws Exception {
                         if (fastMode) {
                             item.data = item.buffer.array();
@@ -262,7 +260,6 @@ public class VideoRecorderAppState extends AbstractAppState {
             }
         }
 
-        @Override
         public void initialize(RenderManager rm, ViewPort viewPort) {
             logger.log(Level.INFO, "initialize in VideoProcessor");
             this.camera = viewPort.getCamera();
@@ -278,16 +275,13 @@ public class VideoRecorderAppState extends AbstractAppState {
             }
         }
 
-        @Override
         public void reshape(ViewPort vp, int w, int h) {
         }
 
-        @Override
         public boolean isInitialized() {
             return this.isInitilized;
         }
 
-        @Override
         public void preFrame(float tpf) {
             if (null == writer) {
                 try {
@@ -298,17 +292,14 @@ public class VideoRecorderAppState extends AbstractAppState {
             }
         }
 
-        @Override
         public void postQueue(RenderQueue rq) {
         }
 
-        @Override
         public void postFrame(FrameBuffer out) {
             numFrames++;
             addImage(renderManager.getRenderer(), out);
         }
 
-        @Override
         public void cleanup() {
             logger.log(Level.INFO, "cleanup in VideoProcessor");
             logger.log(Level.INFO, "VideoProcessor numFrames: {0}", numFrames);
@@ -341,27 +332,22 @@ public class VideoRecorderAppState extends AbstractAppState {
             this.ticks = 0;
         }
 
-        @Override
         public long getTime() {
             return (long) (this.ticks * (1.0f / this.framerate) * 1000f);
         }
 
-        @Override
         public long getResolution() {
             return 1000L;
         }
 
-        @Override
         public float getFrameRate() {
             return this.framerate;
         }
 
-        @Override
         public float getTimePerFrame() {
-            return 1.0f / this.framerate;
+            return (float) (1.0f / this.framerate);
         }
 
-        @Override
         public void update() {
             long time = System.currentTimeMillis();
             long difference = time - lastTime;
@@ -378,7 +364,6 @@ public class VideoRecorderAppState extends AbstractAppState {
             this.ticks++;
         }
 
-        @Override
         public void reset() {
             this.ticks = 0;
         }

jme3-android/src/main/java/com/jme3/asset/plugins/AndroidLocator.java

@@ -17,7 +17,6 @@ public class AndroidLocator implements AssetLocator {
     public AndroidLocator() {
     }
 
-    @Override
     public void setRootPath(String rootPath) {
         this.rootPath = rootPath;
     }

jme3-android/src/main/java/com/jme3/audio/android/AndroidAL.java

@@ -10,64 +10,44 @@ public final class AndroidAL implements AL {
     public AndroidAL() {
     }
 
-    @Override
     public native String alGetString(int parameter);
 
-    @Override
     public native int alGenSources();
 
-    @Override
     public native int alGetError();
 
-    @Override
     public native void alDeleteSources(int numSources, IntBuffer sources);
 
-    @Override
     public native void alGenBuffers(int numBuffers, IntBuffer buffers);
 
-    @Override
     public native void alDeleteBuffers(int numBuffers, IntBuffer buffers);
 
-    @Override
     public native void alSourceStop(int source);
 
-    @Override
     public native void alSourcei(int source, int param, int value);
 
-    @Override
     public native void alBufferData(int buffer, int format, ByteBuffer data, int size, int frequency);
 
-    @Override
     public native void alSourcePlay(int source);
 
-    @Override
     public native void alSourcePause(int source);
 
-    @Override
     public native void alSourcef(int source, int param, float value);
 
-    @Override
     public native void alSource3f(int source, int param, float value1, float value2, float value3);
 
-    @Override
     public native int alGetSourcei(int source, int param);
 
-    @Override
     public native void alSourceUnqueueBuffers(int source, int numBuffers, IntBuffer buffers);
 
-    @Override
     public native void alSourceQueueBuffers(int source, int numBuffers, IntBuffer buffers);
 
-    @Override
     public native void alListener(int param, FloatBuffer data);
 
-    @Override
     public native void alListenerf(int param, float value);
 
-    @Override
     public native void alListener3f(int param, float value1, float value2, float value3);
 
-    @Override
     public native void alSource3i(int source, int param, int value1, int value2, int value3);
 
 }

jme3-android/src/main/java/com/jme3/audio/android/AndroidALC.java

@@ -12,27 +12,19 @@ public final class AndroidALC implements ALC {
     public AndroidALC() {
     }
 
-    @Override
     public native void createALC();
 
-    @Override
     public native void destroyALC();
 
-    @Override
     public native boolean isCreated();
 
-    @Override
     public native String alcGetString(int parameter);
     
-    @Override
     public native boolean alcIsExtensionPresent(String extension);
     
-    @Override
     public native void alcGetInteger(int param, IntBuffer buffer, int size);
     
-    @Override
     public native void alcDevicePauseSOFT();
     
-    @Override
     public native void alcDeviceResumeSOFT();
 }

jme3-android/src/main/java/com/jme3/audio/android/AndroidEFX.java

@@ -8,36 +8,25 @@ public class AndroidEFX implements EFX {
     public AndroidEFX() {
     }
 
-    @Override
     public native void alGenAuxiliaryEffectSlots(int numSlots, IntBuffer buffers);
 
-    @Override
     public native void alGenEffects(int numEffects, IntBuffer buffers);
 
-    @Override
     public native void alEffecti(int effect, int param, int value);
 
-    @Override
     public native void alAuxiliaryEffectSloti(int effectSlot, int param, int value);
 
-    @Override
     public native void alDeleteEffects(int numEffects, IntBuffer buffers);
 
-    @Override
     public native void alDeleteAuxiliaryEffectSlots(int numEffectSlots, IntBuffer buffers);
 
-    @Override
     public native void alGenFilters(int numFilters, IntBuffer buffers);
 
-    @Override
     public native void alFilteri(int filter, int param, int value);
 
-    @Override
     public native void alFilterf(int filter, int param, float value);
 
-    @Override
     public native void alDeleteFilters(int numFilters, IntBuffer buffers);
 
-    @Override
     public native void alEffectf(int effect, int param, float value);
 }

jme3-android/src/main/java/com/jme3/audio/plugins/NativeVorbisLoader.java

@@ -46,7 +46,6 @@ public class NativeVorbisLoader implements AssetLoader {
             throw new IOException("Not supported for audio streams");
         }
 
-        @Override
         public void setTime(float time) {
             try {
                 file.seekTime(time);

jme3-android/src/main/java/com/jme3/input/android/AndroidJoystickJoyInput14.java

@@ -113,7 +113,7 @@ public class AndroidJoystickJoyInput14 {
         joysticks.clear();
         joystickIndex.clear();
 
-        ArrayList<Integer> gameControllerDeviceIds = new ArrayList<>();
+        ArrayList gameControllerDeviceIds = new ArrayList();
         int[] deviceIds = InputDevice.getDeviceIds();
         for (int deviceId : deviceIds) {
             InputDevice dev = InputDevice.getDevice(deviceId);

jme3-android/src/main/java/com/jme3/input/android/AndroidSensorJoyInput.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -561,7 +561,7 @@ public class AndroidSensorJoyInput implements SensorEventListener {
                         }
                     }
                 }
-            } else {
+            } else if (sensorData != null) {
                 if (!sensorData.haveData) {
                     sensorData.haveData = true;
                 }

jme3-android/src/main/java/com/jme3/input/android/AndroidTouchInput.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2012 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -131,8 +131,8 @@ public class AndroidTouchInput implements TouchInput {
 
         // view width and height are 0 until the view is displayed on the screen
         if (androidInput.getView().getWidth() != 0 && androidInput.getView().getHeight() != 0) {
-            scaleX = settings.getWidth() / (float)androidInput.getView().getWidth();
+            scaleX = (float)settings.getWidth() / (float)androidInput.getView().getWidth();
-            scaleY = settings.getHeight() / (float)androidInput.getView().getHeight();
+            scaleY = (float)settings.getHeight() / (float)androidInput.getView().getHeight();
         }
         logger.log(Level.FINE, "Setting input scaling, scaleX: {0}, scaleY: {1}",
                 new Object[]{scaleX, scaleY});

jme3-android/src/main/java/com/jme3/input/android/TouchEventPool.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2012 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -87,7 +87,7 @@ public class TouchEventPool {
         TouchEvent evt = null;
         int curSize = eventPool.size();
         while (curSize > 0) {
-            evt = eventPool.pop();
+            evt = (TouchEvent)eventPool.pop();
             if (evt.isConsumed()) {
                 break;
             } else {

jme3-android/src/main/java/com/jme3/renderer/android/AndroidGL.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2015 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,7 +34,6 @@ package com.jme3.renderer.android;
 import android.opengl.*;
 import com.jme3.renderer.RendererException;
 import com.jme3.renderer.opengl.*;
-import com.jme3.util.BufferUtils;
 
 import java.nio.Buffer;
 import java.nio.ByteBuffer;
@@ -42,11 +41,8 @@ import java.nio.FloatBuffer;
 import java.nio.IntBuffer;
 import java.nio.ShortBuffer;
 
-public class AndroidGL implements GL, GL2, GLES_30, GLExt, GLFbo {
+public class AndroidGL implements GL, GLExt, GLFbo {
 
-    IntBuffer tmpBuff = BufferUtils.createIntBuffer(1);
-
-    @Override
     public void resetStats() {
     }
 
@@ -87,12 +83,10 @@ public class AndroidGL implements GL, GL2, GLES_30, GLExt, GLFbo {
         }
     }
 
-    @Override
     public void glActiveTexture(int texture) {
         GLES20.glActiveTexture(texture);
     }
 
-    @Override
     public void glAttachShader(int program, int shader) {
         GLES20.glAttachShader(program, shader);
     }
@@ -102,179 +96,144 @@ public class AndroidGL implements GL, GL2, GLES_30, GLExt, GLFbo {
         GLES30.glBeginQuery(target, query);
     }
 
-    @Override
     public void glBindBuffer(int target, int buffer) {
         GLES20.glBindBuffer(target, buffer);
     }
 
-    @Override
     public void glBindTexture(int target, int texture) {
         GLES20.glBindTexture(target, texture);
     }
 
-    @Override
     public void glBlendFunc(int sfactor, int dfactor) {
         GLES20.glBlendFunc(sfactor, dfactor);
     }
     
-    @Override
     public void glBlendFuncSeparate(int sfactorRGB, int dfactorRGB, int sfactorAlpha, int dfactorAlpha) {
        GLES20.glBlendFuncSeparate(sfactorRGB, dfactorRGB, sfactorAlpha, dfactorAlpha);
     }
 
-    @Override
     public void glBufferData(int target, FloatBuffer data, int usage) {
         GLES20.glBufferData(target, getLimitBytes(data), data, usage);
     }
 
-    @Override
     public void glBufferData(int target, ShortBuffer data, int usage) {
         GLES20.glBufferData(target, getLimitBytes(data), data, usage);
     }
 
-    @Override
     public void glBufferData(int target, ByteBuffer data, int usage) {
         GLES20.glBufferData(target, getLimitBytes(data), data, usage);
     }
 
-    @Override
     public void glBufferData(int target, long data_size, int usage) {
         GLES20.glBufferData(target, (int) data_size, null, usage);
     }
 
-    @Override
     public void glBufferSubData(int target, long offset, FloatBuffer data) {
         GLES20.glBufferSubData(target, (int) offset, getLimitBytes(data), data);
     }
 
-    @Override
     public void glBufferSubData(int target, long offset, ShortBuffer data) {
         GLES20.glBufferSubData(target, (int) offset, getLimitBytes(data), data);
     }
 
-    @Override
     public void glBufferSubData(int target, long offset, ByteBuffer data) {
         GLES20.glBufferSubData(target, (int) offset, getLimitBytes(data), data);
     }
 
-    @Override
     public void glGetBufferSubData(int target, long offset, ByteBuffer data) {
         throw new UnsupportedOperationException("OpenGL ES 2 does not support glGetBufferSubData");
     }
 
-    @Override
     public void glClear(int mask) {
         GLES20.glClear(mask);
     }
 
-    @Override
     public void glClearColor(float red, float green, float blue, float alpha) {
         GLES20.glClearColor(red, green, blue, alpha);
     }
 
-    @Override
     public void glColorMask(boolean red, boolean green, boolean blue, boolean alpha) {
         GLES20.glColorMask(red, green, blue, alpha);
     }
 
-    @Override
     public void glCompileShader(int shader) {
         GLES20.glCompileShader(shader);
     }
 
-    @Override
     public void glCompressedTexImage2D(int target, int level, int internalformat, int width, int height, int border, ByteBuffer data) {
         GLES20.glCompressedTexImage2D(target, level, internalformat, width, height, 0, getLimitBytes(data), data);
     }
 
-    @Override
     public void glCompressedTexSubImage2D(int target, int level, int xoffset, int yoffset, int width, int height, int format, ByteBuffer data) {
         GLES20.glCompressedTexSubImage2D(target, level, xoffset, yoffset, width, height, format, getLimitBytes(data), data);
     }
 
-    @Override
     public int glCreateProgram() {
         return GLES20.glCreateProgram();
     }
 
-    @Override
     public int glCreateShader(int shaderType) {
         return GLES20.glCreateShader(shaderType);
     }
 
-    @Override
     public void glCullFace(int mode) {
         GLES20.glCullFace(mode);
     }
 
-    @Override
     public void glDeleteBuffers(IntBuffer buffers) {
         checkLimit(buffers);
         GLES20.glDeleteBuffers(buffers.limit(), buffers);
     }
 
-    @Override
     public void glDeleteProgram(int program) {
         GLES20.glDeleteProgram(program);
     }
 
-    @Override
     public void glDeleteShader(int shader) {
         GLES20.glDeleteShader(shader);
     }
 
-    @Override
     public void glDeleteTextures(IntBuffer textures) {
         checkLimit(textures);
         GLES20.glDeleteTextures(textures.limit(), textures);
     }
 
-    @Override
     public void glDepthFunc(int func) {
         GLES20.glDepthFunc(func);
     }
 
-    @Override
     public void glDepthMask(boolean flag) {
         GLES20.glDepthMask(flag);
     }
 
-    @Override
     public void glDepthRange(double nearVal, double farVal) {
         GLES20.glDepthRangef((float)nearVal, (float)farVal);
     }
 
-    @Override
     public void glDetachShader(int program, int shader) {
         GLES20.glDetachShader(program, shader);
     }
 
-    @Override
     public void glDisable(int cap) {
         GLES20.glDisable(cap);
     }
 
-    @Override
     public void glDisableVertexAttribArray(int index) {
         GLES20.glDisableVertexAttribArray(index);
     }
 
-    @Override
     public void glDrawArrays(int mode, int first, int count) {
         GLES20.glDrawArrays(mode, first, count);
     }
 
-    @Override
     public void glDrawRangeElements(int mode, int start, int end, int count, int type, long indices) {
         GLES20.glDrawElements(mode, count, type, (int)indices);
     }
 
-    @Override
     public void glEnable(int cap) {
         GLES20.glEnable(cap);
     }
 
-    @Override
     public void glEnableVertexAttribArray(int index) {
         GLES20.glEnableVertexAttribArray(index);
     }
@@ -284,13 +243,11 @@ public class AndroidGL implements GL, GL2, GLES_30, GLExt, GLFbo {
         GLES30.glEndQuery(target);
     }
 
-    @Override
     public void glGenBuffers(IntBuffer buffers) {
         checkLimit(buffers);
         GLES20.glGenBuffers(buffers.limit(), buffers);
     }
 
-    @Override
     public void glGenTextures(IntBuffer textures) {
         checkLimit(textures);
         GLES20.glGenTextures(textures.limit(), textures);
@@ -301,35 +258,29 @@ public class AndroidGL implements GL, GL2, GLES_30, GLExt, GLFbo {
         GLES30.glGenQueries(num, buff);
     }
 
-    @Override
     public int glGetAttribLocation(int program, String name) {
         return GLES20.glGetAttribLocation(program, name);
     }
 
-    @Override
     public void glGetBoolean(int pname, ByteBuffer params) {
         // GLES20.glGetBoolean(pname, params);
         throw new UnsupportedOperationException("Today is not a good day for this");
     }
 
-    @Override
     public int glGetError() {
         return GLES20.glGetError();
     }
 
-    @Override
     public void glGetInteger(int pname, IntBuffer params) {
         checkLimit(params);
         GLES20.glGetIntegerv(pname, params);
     }
 
-    @Override
     public void glGetProgram(int program, int pname, IntBuffer params) {
         checkLimit(params);
         GLES20.glGetProgramiv(program, pname, params);
     }
 
-    @Override
     public String glGetProgramInfoLog(int program, int maxLength) {
         return GLES20.glGetProgramInfoLog(program);
     }
@@ -349,63 +300,51 @@ public class AndroidGL implements GL, GL2, GLES_30, GLExt, GLFbo {
         return buff.get(0);
     }
 
-    @Override
     public void glGetShader(int shader, int pname, IntBuffer params) {
         checkLimit(params);
         GLES20.glGetShaderiv(shader, pname, params);
     }
 
-    @Override
     public String glGetShaderInfoLog(int shader, int maxLength) {
         return GLES20.glGetShaderInfoLog(shader);
     }
 
-    @Override
     public String glGetString(int name) {
         return GLES20.glGetString(name);
     }
 
-    @Override
     public int glGetUniformLocation(int program, String name) {
         return GLES20.glGetUniformLocation(program, name);
     }
 
-    @Override
     public boolean glIsEnabled(int cap) {
         return GLES20.glIsEnabled(cap);
     }
 
-    @Override
     public void glLineWidth(float width) {
         GLES20.glLineWidth(width);
     }
 
-    @Override
     public void glLinkProgram(int program) {
         GLES20.glLinkProgram(program);
     }
 
-    @Override
     public void glPixelStorei(int pname, int param) {
         GLES20.glPixelStorei(pname, param);
     }
 
-    @Override
     public void glPolygonOffset(float factor, float units) {
         GLES20.glPolygonOffset(factor, units);
     }
 
-    @Override
     public void glReadPixels(int x, int y, int width, int height, int format, int type, ByteBuffer data) {
         GLES20.glReadPixels(x, y, width, height, format, type, data);
     }
 
-    @Override
     public void glScissor(int x, int y, int width, int height) {
         GLES20.glScissor(x, y, width, height);
     }
 
-    @Override
     public void glShaderSource(int shader, String[] string, IntBuffer length) {
         if (string.length != 1) {
             throw new UnsupportedOperationException("Today is not a good day");
@@ -413,231 +352,186 @@ public class AndroidGL implements GL, GL2, GLES_30, GLExt, GLFbo {
         GLES20.glShaderSource(shader, string[0]);
     }
 
-    @Override
     public void glStencilFuncSeparate(int face, int func, int ref, int mask) {
         GLES20.glStencilFuncSeparate(face, func, ref, mask);
     }
 
-    @Override
     public void glStencilOpSeparate(int face, int sfail, int dpfail, int dppass) {
         GLES20.glStencilOpSeparate(face, sfail, dpfail, dppass);
     }
 
-    @Override
     public void glTexImage2D(int target, int level, int internalFormat, int width, int height, int border, int format, int type, ByteBuffer data) {
-        GLES20.glTexImage2D(target, level, internalFormat, width, height, 0, format, type, data);
+        GLES20.glTexImage2D(target, level, format, width, height, 0, format, type, data);
     }
 
-    @Override
     public void glTexParameterf(int target, int pname, float param) {
         GLES20.glTexParameterf(target, pname, param);
     }
 
-    @Override
     public void glTexParameteri(int target, int pname, int param) {
         GLES20.glTexParameteri(target, pname, param);
     }
 
-    @Override
     public void glTexSubImage2D(int target, int level, int xoffset, int yoffset, int width, int height, int format, int type, ByteBuffer data) {
         GLES20.glTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, data);
     }
 
-    @Override
     public void glUniform1(int location, FloatBuffer value) {
         GLES20.glUniform1fv(location, getLimitCount(value, 1), value);
     }
 
-    @Override
     public void glUniform1(int location, IntBuffer value) {
         GLES20.glUniform1iv(location, getLimitCount(value, 1), value);
     }
 
-    @Override
     public void glUniform1f(int location, float v0) {
         GLES20.glUniform1f(location, v0);
     }
 
-    @Override
     public void glUniform1i(int location, int v0) {
         GLES20.glUniform1i(location, v0);
     }
 
-    @Override
     public void glUniform2(int location, IntBuffer value) {
         GLES20.glUniform2iv(location, getLimitCount(value, 2), value);
     }
 
-    @Override
     public void glUniform2(int location, FloatBuffer value) {
         GLES20.glUniform2fv(location, getLimitCount(value, 2), value);
     }
 
-    @Override
     public void glUniform2f(int location, float v0, float v1) {
         GLES20.glUniform2f(location, v0, v1);
     }
 
-    @Override
     public void glUniform3(int location, IntBuffer value) {
         GLES20.glUniform3iv(location, getLimitCount(value, 3), value);
     }
 
-    @Override
     public void glUniform3(int location, FloatBuffer value) {
         GLES20.glUniform3fv(location, getLimitCount(value, 3), value);
     }
 
-    @Override
     public void glUniform3f(int location, float v0, float v1, float v2) {
         GLES20.glUniform3f(location, v0, v1, v2);
     }
 
-    @Override
     public void glUniform4(int location, FloatBuffer value) {
         GLES20.glUniform4fv(location, getLimitCount(value, 4), value);
     }
 
-    @Override
     public void glUniform4(int location, IntBuffer value) {
         GLES20.glUniform4iv(location, getLimitCount(value, 4), value);
     }
 
-    @Override
     public void glUniform4f(int location, float v0, float v1, float v2, float v3) {
         GLES20.glUniform4f(location, v0, v1, v2, v3);
     }
 
-    @Override
     public void glUniformMatrix3(int location, boolean transpose, FloatBuffer value) {
         GLES20.glUniformMatrix3fv(location, getLimitCount(value, 3 * 3), transpose, value);
     }
 
-    @Override
     public void glUniformMatrix4(int location, boolean transpose, FloatBuffer value) {
         GLES20.glUniformMatrix4fv(location, getLimitCount(value, 4 * 4), transpose, value);
     }
 
-    @Override
     public void glUseProgram(int program) {
         GLES20.glUseProgram(program);
     }
 
-    @Override
     public void glVertexAttribPointer(int index, int size, int type, boolean normalized, int stride, long pointer) {
         GLES20.glVertexAttribPointer(index, size, type, normalized, stride, (int)pointer);
     }
 
-    @Override
     public void glViewport(int x, int y, int width, int height) {
         GLES20.glViewport(x, y, width, height);
     }
 
-    @Override
     public void glBlitFramebufferEXT(int srcX0, int srcY0, int srcX1, int srcY1, int dstX0, int dstY0, int dstX1, int dstY1, int mask, int filter) {
-        GLES30.glBlitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
+        throw new UnsupportedOperationException("FBO blit not available on Android");
     }
 
-    @Override
     public void glBufferData(int target, IntBuffer data, int usage) {
         GLES20.glBufferData(target, getLimitBytes(data), data, usage);
     }
 
-    @Override
     public void glBufferSubData(int target, long offset, IntBuffer data) {
         GLES20.glBufferSubData(target, (int)offset, getLimitBytes(data), data);
     }
 
-    @Override
     public void glDrawArraysInstancedARB(int mode, int first, int count, int primcount) {
-        GLES30.glDrawArraysInstanced(mode, first, count, primcount);
+        throw new UnsupportedOperationException("Instancing not available on Android");
     }
 
-    @Override
     public void glDrawBuffers(IntBuffer bufs) {
-        GLES30.glDrawBuffers(bufs.limit(), bufs);
+        throw new UnsupportedOperationException("MRT not available on Android");
     }
 
-    @Override
     public void glDrawElementsInstancedARB(int mode, int indices_count, int type, long indices_buffer_offset, int primcount) {
-        GLES30.glDrawElementsInstanced(mode, indices_count, type, (int)indices_buffer_offset, primcount);
+        throw new UnsupportedOperationException("Instancing not available on Android");
     }
 
-    @Override
     public void glGetMultisample(int pname, int index, FloatBuffer val) {
-        GLES31.glGetMultisamplefv(pname, index, val);
+        throw new UnsupportedOperationException("Multisample renderbuffers not available on Android");
     }
 
-    @Override
     public void glRenderbufferStorageMultisampleEXT(int target, int samples, int internalformat, int width, int height) {
-        GLES30.glRenderbufferStorageMultisample(target, samples, internalformat, width, height);
+        throw new UnsupportedOperationException("Multisample renderbuffers not available on Android");
     }
 
-    @Override
     public void glTexImage2DMultisample(int target, int samples, int internalformat, int width, int height, boolean fixedsamplelocations) {
-        GLES31.glTexStorage2DMultisample(target, samples, internalformat, width, height, fixedsamplelocations);
+        throw new UnsupportedOperationException("Multisample textures not available on Android");
     }
 
-    @Override
     public void glVertexAttribDivisorARB(int index, int divisor) {
-        GLES30.glVertexAttribDivisor(index, divisor);
+        throw new UnsupportedOperationException("Instancing not available on Android");
     }
 
-    @Override
     public void glBindFramebufferEXT(int param1, int param2) {
         GLES20.glBindFramebuffer(param1, param2);
     }
 
-    @Override
     public void glBindRenderbufferEXT(int param1, int param2) {
         GLES20.glBindRenderbuffer(param1, param2);
     }
 
-    @Override
     public int glCheckFramebufferStatusEXT(int param1) {
         return GLES20.glCheckFramebufferStatus(param1);
     }
 
-    @Override
     public void glDeleteFramebuffersEXT(IntBuffer param1) {
         checkLimit(param1);
         GLES20.glDeleteFramebuffers(param1.limit(), param1);
     }
 
-    @Override
     public void glDeleteRenderbuffersEXT(IntBuffer param1) {
         checkLimit(param1);
         GLES20.glDeleteRenderbuffers(param1.limit(), param1);
     }
 
-    @Override
     public void glFramebufferRenderbufferEXT(int param1, int param2, int param3, int param4) {
         GLES20.glFramebufferRenderbuffer(param1, param2, param3, param4);
     }
 
-    @Override
     public void glFramebufferTexture2DEXT(int param1, int param2, int param3, int param4, int param5) {
         GLES20.glFramebufferTexture2D(param1, param2, param3, param4, param5);
     }
 
-    @Override
     public void glGenFramebuffersEXT(IntBuffer param1) {
         checkLimit(param1);
         GLES20.glGenFramebuffers(param1.limit(), param1);
     }
 
-    @Override
     public void glGenRenderbuffersEXT(IntBuffer param1) {
         checkLimit(param1);
         GLES20.glGenRenderbuffers(param1.limit(), param1);
     }
 
-    @Override
     public void glGenerateMipmapEXT(int param1) {
         GLES20.glGenerateMipmap(param1);
     }
 
-    @Override
     public void glRenderbufferStorageEXT(int param1, int param2, int param3, int param4) {
         GLES20.glRenderbufferStorage(param1, param2, param3, param4);
     }
@@ -670,58 +564,6 @@ public class AndroidGL implements GL, GL2, GLES_30, GLExt, GLFbo {
     
     @Override
     public void glFramebufferTextureLayerEXT(int target, int attachment, int texture, int level, int layer) {
-        GLES30.glFramebufferTextureLayer(target, attachment, texture, level, layer);
+        throw new UnsupportedOperationException("OpenGL ES 2 does not support texture arrays");
     }
-
-    @Override
-    public void glAlphaFunc(int func, float ref) {
-    }
-    
-    @Override
-    public void glPointSize(float size) {
-    }
-
-    @Override
-    public void glPolygonMode(int face, int mode) {
-    }
-
-    // Wrapper to DrawBuffers as there's no DrawBuffer method in GLES
-    @Override
-    public void glDrawBuffer(int mode) {
-        tmpBuff.clear();
-        tmpBuff.put(0, mode);
-        tmpBuff.rewind();
-        glDrawBuffers(tmpBuff);
-    }
-
-    @Override
-    public void glReadBuffer(int mode) {
-        GLES30.glReadBuffer(mode);
-    }
-
-    @Override
-    public void glCompressedTexImage3D(int target, int level, int internalFormat, int width, int height, int depth,
-                                           int border, ByteBuffer data) {
-        GLES30.glCompressedTexImage3D(target, level, internalFormat, width, height, depth, border, getLimitBytes(data), data);
-    }
-
-    @Override
-    public void glCompressedTexSubImage3D(int target, int level, int xoffset, int yoffset, int zoffset, int width,
-                                              int height, int depth, int format, ByteBuffer data) {
-        GLES30.glCompressedTexSubImage3D(target, level, xoffset, yoffset, zoffset, width, height, depth, format, getLimitBytes(data), data);
-    }
-
-    @Override
-    public void glTexImage3D(int target, int level, int internalFormat, int width, int height, int depth, int border,
-                                 int format, int type, ByteBuffer data) {
-        GLES30.glTexImage3D(target, level, internalFormat, width, height, depth, border, format, type, data);
-    }
-
-    @Override
-    public void glTexSubImage3D(int target, int level, int xoffset, int yoffset, int zoffset, int width, int height,
-                                    int depth, int format, int type, ByteBuffer data) {
-        GLES30.glTexSubImage3D(target, level, xoffset, yoffset, zoffset, width, height, depth, format, type, data);
-    }
-
 }
-

jme3-android/src/main/java/com/jme3/system/android/AndroidConfigChooser.java

@@ -19,7 +19,6 @@ public class AndroidConfigChooser implements EGLConfigChooser {
     private static final Logger logger = Logger.getLogger(AndroidConfigChooser.class.getName());
     protected AppSettings settings;
     private final static int EGL_OPENGL_ES2_BIT = 4;
-    private final static int EGL_OPENGL_ES3_BIT = 0x40;
 
     public AndroidConfigChooser(AppSettings settings) {
         this.settings = settings;
@@ -141,29 +140,12 @@ public class AndroidConfigChooser implements EGLConfigChooser {
 
         int[] num_config = new int[1];
         int[] configSpec = new int[]{
-            EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT,
+            EGL10.EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
             EGL10.EGL_NONE};
-        boolean gles3=true;
 
-        // Try openGL ES 3
+        if (!egl.eglChooseConfig(display, configSpec, null, 0, num_config)) {
-        try {
+            RendererUtil.checkEGLError(egl);
-            if (!egl.eglChooseConfig(display, configSpec, null, 0, num_config)) {
+            throw new AssertionError();
-                RendererUtil.checkEGLError(egl);
-                gles3=false;
-            }
-        } catch (com.jme3.renderer.RendererException re) { 
-            // it's just the device not supporting GLES3. Fallback to GLES2
-            gles3=false;
-        } 
-
-        if(!gles3)
-        {
-            // Get back to openGL ES 2
-            configSpec[1]=EGL_OPENGL_ES2_BIT;
-            if (!egl.eglChooseConfig(display, configSpec, null, 0, num_config)) {
-                RendererUtil.checkEGLError(egl);
-                throw new AssertionError();
-            }
         }
 
         int numConfigs = num_config[0];

jme3-android/src/main/java/com/jme3/system/android/JmeAndroidSystem.java

@@ -204,7 +204,6 @@ public class JmeAndroidSystem extends JmeSystemDelegate {
     public void showSoftKeyboard(final boolean show) {
         view.getHandler().post(new Runnable() {
 
-            @Override
             public void run() {
                 InputMethodManager manager =
                         (InputMethodManager)view.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);

jme3-android/src/main/java/com/jme3/system/android/OGLESContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -52,10 +52,13 @@ import com.jme3.input.controls.SoftTextDialogInputListener;
 import com.jme3.input.dummy.DummyKeyInput;
 import com.jme3.input.dummy.DummyMouseInput;
 import com.jme3.renderer.android.AndroidGL;
-import com.jme3.renderer.opengl.*;
+import com.jme3.renderer.opengl.GL;
+import com.jme3.renderer.opengl.GLDebugES;
+import com.jme3.renderer.opengl.GLExt;
+import com.jme3.renderer.opengl.GLFbo;
+import com.jme3.renderer.opengl.GLRenderer;
+import com.jme3.renderer.opengl.GLTracer;
 import com.jme3.system.*;
-import com.jme3.util.AndroidBufferAllocator;
-import com.jme3.util.BufferAllocatorFactory;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Level;
 import java.util.logging.Logger;
@@ -78,14 +81,6 @@ public class OGLESContext implements JmeContext, GLSurfaceView.Renderer, SoftTex
     protected long minFrameDuration = 0;                   // No FPS cap
     protected long lastUpdateTime = 0;
 
-    static {
-        final String implementation = BufferAllocatorFactory.PROPERTY_BUFFER_ALLOCATOR_IMPLEMENTATION;
-
-        if (System.getProperty(implementation) == null) {
-            System.setProperty(implementation, AndroidBufferAllocator.class.getName());
-        }
-    }
-
     public OGLESContext() {
     }
 
@@ -104,13 +99,13 @@ public class OGLESContext implements JmeContext, GLSurfaceView.Renderer, SoftTex
      * @return GLSurfaceView The newly created view
      */
     public GLSurfaceView createView(Context context) {
-        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
-        ConfigurationInfo info = am.getDeviceConfigurationInfo();
         // NOTE: We assume all ICS devices have OpenGL ES 2.0.
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
             // below 4.0, check OpenGL ES 2.0 support.
+            ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
+            ConfigurationInfo info = am.getDeviceConfigurationInfo();
             if (info.reqGlEsVersion < 0x20000) {
-                throw new UnsupportedOperationException("OpenGL ES 2.0 or better is not supported on this device");
+                throw new UnsupportedOperationException("OpenGL ES 2.0 is not supported on this device");
             }
         } else if (Build.VERSION.SDK_INT < 9){
             throw new UnsupportedOperationException("jME3 requires Android 2.3 or later");
@@ -131,8 +126,7 @@ public class OGLESContext implements JmeContext, GLSurfaceView.Renderer, SoftTex
 
         // setEGLContextClientVersion must be set before calling setRenderer
         // this means it cannot be set in AndroidConfigChooser (too late)
-        // use proper openGL ES version
+        view.setEGLContextClientVersion(2);
-        view.setEGLContextClientVersion(info.reqGlEsVersion>>16);
 
         view.setFocusableInTouchMode(true);
         view.setFocusable(true);
@@ -196,21 +190,20 @@ public class OGLESContext implements JmeContext, GLSurfaceView.Renderer, SoftTex
 
         // Setup unhandled Exception Handler
         Thread.currentThread().setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
-            @Override
             public void uncaughtException(Thread thread, Throwable thrown) {
                 listener.handleError("Exception thrown in " + thread.toString(), thrown);
             }
         });
 
         timer = new NanoTimer();
-        GL gl = new AndroidGL();
+        Object gl = new AndroidGL();
         if (settings.getBoolean("GraphicsDebug")) {
-            gl = (GL) GLDebug.createProxy(gl, gl, GL.class, GL2.class, GLES_30.class, GLFbo.class, GLExt.class);
+            gl = new GLDebugES((GL) gl, (GLExt) gl, (GLFbo) gl);
         }
         if (settings.getBoolean("GraphicsTrace")) {
-            gl = (GL)GLTracer.createGlesTracer(gl, GL.class, GLES_30.class, GLFbo.class, GLExt.class);
+            gl = GLTracer.createGlesTracer(gl, GL.class, GLFbo.class, GLExt.class);
         }
-        renderer = new GLRenderer(gl, (GLExt)gl, (GLFbo)gl);
+        renderer = new GLRenderer((GL)gl, (GLExt)gl, (GLFbo)gl);
         renderer.initialize();
 
         JmeSystem.setSoftTextDialogInput(this);
@@ -249,7 +242,7 @@ public class OGLESContext implements JmeContext, GLSurfaceView.Renderer, SoftTex
         }
 
         if (settings.getFrameRate() > 0) {
-            minFrameDuration = (long)(1000d / settings.getFrameRate()); // ms
+            minFrameDuration = (long)(1000d / (double)settings.getFrameRate()); // ms
             logger.log(Level.FINE, "Setting min tpf: {0}ms", minFrameDuration);
         } else {
             minFrameDuration = 0;
@@ -409,7 +402,6 @@ public class OGLESContext implements JmeContext, GLSurfaceView.Renderer, SoftTex
         }
     }
 
-    @Override
     public void requestDialog(final int id, final String title, final String initialValue, final SoftTextDialogInputListener listener) {
         logger.log(Level.FINE, "requestDialog: title: {0}, initialValue: {1}",
                 new Object[]{title, initialValue});
@@ -453,7 +445,6 @@ public class OGLESContext implements JmeContext, GLSurfaceView.Renderer, SoftTex
 
                 AlertDialog dialogTextInput = new AlertDialog.Builder(view.getContext()).setTitle(title).setView(layoutTextDialogInput).setPositiveButton("OK",
                         new DialogInterface.OnClickListener() {
-                            @Override
                             public void onClick(DialogInterface dialog, int whichButton) {
                                 /* User clicked OK, send COMPLETE action
                                  * and text */
@@ -461,7 +452,6 @@ public class OGLESContext implements JmeContext, GLSurfaceView.Renderer, SoftTex
                             }
                         }).setNegativeButton("Cancel",
                         new DialogInterface.OnClickListener() {
-                            @Override
                             public void onClick(DialogInterface dialog, int whichButton) {
                                 /* User clicked CANCEL, send CANCEL action
                                  * and text */

jme3-android/src/main/java/com/jme3/texture/plugins/AndroidBufferImageLoader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2014 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -67,7 +67,6 @@ public class AndroidBufferImageLoader implements AssetLoader {
         }
     }
     
-    @Override
     public Object load(AssetInfo assetInfo) throws IOException {
         Bitmap bitmap = null;
         Image.Format format;

jme3-android/src/main/java/com/jme3/texture/plugins/AndroidNativeImageLoader.java

@@ -25,13 +25,12 @@ public class AndroidNativeImageLoader  implements AssetLoader {
     
     private static native Image load(InputStream in, boolean flipY, byte[] tmpArray) throws IOException;
     
-    @Override
     public Image load(AssetInfo info) throws IOException {
         boolean flip = ((TextureKey) info.getKey()).isFlipY();
         InputStream in = null;
         try {
             in = info.openStream();
-            return load(in, flip, tmpArray);
+            return load(info.openStream(), flip, tmpArray);
         } finally {
             if (in != null){
                 in.close();

jme3-android/src/main/java/com/jme3/util/AndroidBufferAllocator.java

@@ -1,114 +0,0 @@
-/*
- * Copyright (c) 2009-2019 jMonkeyEngine
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * * Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- *
- * * Redistributions in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- *
- * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
- *   may be used to endorse or promote products derived from this software
- *   without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-package com.jme3.util;
-
-import java.lang.reflect.Field;
-import java.nio.Buffer;
-import java.nio.ByteBuffer;
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * @author Jesus Oliver
- */
-public class AndroidBufferAllocator implements BufferAllocator {
-
-    // We make use of the ReflectionAllocator to remove the inner buffer
-    private static final ReflectionAllocator reflectionAllocator = new ReflectionAllocator();
-
-    private static final String[] wrapperClassNames = {
-            "java.nio.ByteBufferAsFloatBuffer",
-            "java.nio.ByteBufferAsIntBuffer",
-            "java.nio.ByteBufferAsDoubleBuffer",
-            "java.nio.ByteBufferAsShortBuffer",
-            "java.nio.ByteBufferAsLongBuffer",
-            "java.nio.ByteBufferAsCharBuffer",
-    };
-    private static final String[] possibleBufferFieldNames = {"bb", "byteBuffer"};
-
-    // Keep track of ByteBuffer field by the wrapper class
-    private static final Map<Class, Field> fieldIndex = new HashMap<>();
-
-    static {
-        for (String className : wrapperClassNames) {
-            try {
-                Class clazz = Class.forName(className);
-
-                // loop for all possible field names in android
-                for (String fieldName : possibleBufferFieldNames) {
-                    try {
-                        Field field = clazz.getDeclaredField(fieldName);
-                        field.setAccessible(true);
-                        fieldIndex.put(clazz, field);
-                        break;
-                    } catch (NoSuchFieldException e) {
-                    }
-                }
-            } catch (ClassNotFoundException ex) {
-            }
-        }
-    }
-
-    @Override
-    /**
-     * This function search the inner direct buffer of the android specific wrapped buffer classes
-     * and destroys it using the reflection allocator method.
-     *
-     * @param toBeDestroyed The direct buffer that will be "cleaned".
-     *
-     */
-    public void destroyDirectBuffer(Buffer toBeDestroyed) {
-        // If it is a wrapped buffer, get it's inner direct buffer field and destroy it
-        Field field = fieldIndex.get(toBeDestroyed.getClass());
-        if (field != null) {
-            try {
-                ByteBuffer innerBuffer = (ByteBuffer) field.get(toBeDestroyed);
-                if (innerBuffer != null) {
-                    // Destroy it using the reflection method
-                    reflectionAllocator.destroyDirectBuffer(innerBuffer);
-                }
-            } catch (IllegalAccessException ex) {
-            }
-
-        } else {
-            // It is not a wrapped buffer, use default reflection allocator to remove it instead.
-            reflectionAllocator.destroyDirectBuffer(toBeDestroyed);
-        }
-    }
-
-    @Override
-    public ByteBuffer allocate(int size) {
-        return ByteBuffer.allocateDirect(size);
-    }
-}
-

jme3-android/src/main/java/com/jme3/util/RingBuffer.java

@@ -49,7 +49,6 @@ public class RingBuffer<T> implements Iterable<T> {
         return item;
     }
 
-    @Override
     public Iterator<T> iterator() {
         return new RingBufferIterator();
     }
@@ -59,17 +58,14 @@ public class RingBuffer<T> implements Iterable<T> {
 
         private int i = 0;
 
-        @Override
         public boolean hasNext() {
             return i < count;
         }
 
-        @Override
         public void remove() {
             throw new UnsupportedOperationException();
         }
 
-        @Override
         public T next() {
             if (!hasNext()) {
                 throw new NoSuchElementException();

jme3-blender/build.gradle

@@ -0,0 +1,12 @@
+if (!hasProperty('mainClass')) {
+    ext.mainClass = ''
+}
+
+dependencies {
+    compile project(':jme3-core')
+    compile project(':jme3-desktop')
+    compile project(':jme3-effects')
+    compile ('org.ejml:core:0.27')
+    compile ('org.ejml:dense64:0.27')
+    compile ('org.ejml:simple:0.27')
+}

jme3-blender/src/main/java/com/jme3/asset/BlenderKey.java

@@ -0,0 +1,733 @@
+/*
+ * Copyright (c) 2009-2018 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.asset;
+
+import java.io.IOException;
+
+import com.jme3.export.InputCapsule;
+import com.jme3.export.JmeExporter;
+import com.jme3.export.JmeImporter;
+import com.jme3.export.OutputCapsule;
+import com.jme3.material.Material;
+import com.jme3.material.RenderState.FaceCullMode;
+
+/**
+ * Blender key. Contains path of the blender file and its loading properties.
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class BlenderKey extends ModelKey {
+    protected static final int         DEFAULT_FPS               = 25;
+    /**
+     * FramesPerSecond parameter describe how many frames there are in each second. It allows to calculate the time
+     * between the frames.
+     */
+    protected int                      fps                       = DEFAULT_FPS;
+    /**
+     * This variable is a bitwise flag of FeatureToLoad interface values; By default everything is being loaded.
+     */
+    protected int                      featuresToLoad            = FeaturesToLoad.ALL;
+    /** The variable that tells if content of the file (along with data unlinked to any feature on the scene) should be stored as 'user data' in the result spatial. */
+    protected boolean                  loadUnlinkedAssets;
+    /** The root path for all the assets. */
+    protected String                   assetRootPath;
+    /** This variable indicate if Y axis is UP axis. If not then Z is up. By default set to true. */
+    protected boolean                  fixUpAxis                 = true;
+    /** Generated textures resolution (PPU - Pixels Per Unit). */
+    protected int                      generatedTexturePPU       = 128;
+    /**
+     * The name of world settings that the importer will use. If not set or specified name does not occur in the file
+     * then the first world settings in the file will be used.
+     */
+    protected String                   usedWorld;
+    /**
+     * User's default material that is set for objects that have no material definition in blender. The default value is
+     * null. If the value is null the importer will use its own default material (gray color - like in blender).
+     */
+    protected Material                 defaultMaterial;
+    /** Face cull mode. By default it is disabled. */
+    protected FaceCullMode             faceCullMode              = FaceCullMode.Back;
+    /**
+     * Variable describes which layers will be loaded. N-th bit set means N-th layer will be loaded.
+     * If set to -1 then the current layer will be loaded.
+     */
+    protected int                      layersToLoad              = -1;
+    /** A variable that toggles the object custom properties loading. */
+    protected boolean                  loadObjectProperties      = true;
+    /**
+     * Maximum texture size. Might be dependant on the graphic card.
+     * This value is taken from <b>org.lwjgl.opengl.GL11.GL_MAX_TEXTURE_SIZE</b>.
+     */
+    protected int                      maxTextureSize            = 8192;
+    /** Allows to toggle generated textures loading. Disabled by default because it very often takes too much memory and needs to be used wisely. */
+    protected boolean                  loadGeneratedTextures;
+    /** Tells if the mipmaps will be generated by jme or not. By default generation is dependant on the blender settings. */
+    protected MipmapGenerationMethod   mipmapGenerationMethod    = MipmapGenerationMethod.GENERATE_WHEN_NEEDED;
+    /**
+     * If the sky has only generated textures applied then they will have the following size (both width and height). If 2d textures are used then the generated
+     * textures will get their proper size.
+     */
+    protected int                      skyGeneratedTextureSize   = 1000;
+    /** The radius of a shape that will be used while creating the generated texture for the sky. The higher it is the larger part of the texture will be seen. */
+    protected float                    skyGeneratedTextureRadius = 1;
+    /** The shape against which the generated texture for the sky will be created. */
+    protected SkyGeneratedTextureShape skyGeneratedTextureShape  = SkyGeneratedTextureShape.SPHERE;
+    /**
+     * This field tells if the importer should optimise the use of textures or not. If set to true, then textures of the same mapping type will be merged together
+     * and textures that in the final result will never be visible - will be discarded.
+     */
+    protected boolean                  optimiseTextures;
+    /** The method of matching animations to skeletons. The default value is: AT_LEAST_ONE_NAME_MATCH. */
+    protected AnimationMatchMethod     animationMatchMethod      = AnimationMatchMethod.AT_LEAST_ONE_NAME_MATCH;
+    /** The size of points that are loaded and do not belong to any edge of the mesh. */
+    protected float                    pointsSize                = 1;
+    /** The width of edges that are loaded from the mesh and do not belong to any face. */
+    protected float                    linesWidth                = 1;
+
+    /**
+     * Constructor used by serialization mechanisms.
+     */
+    public BlenderKey() {
+    }
+
+    /**
+     * Constructor. Creates a key for the given file name.
+     * @param name
+     *            the name (path) of a file
+     */
+    public BlenderKey(String name) {
+        super(name);
+    }
+
+    /**
+     * This method returns frames per second amount. The default value is BlenderKey.DEFAULT_FPS = 25.
+     * @return the frames per second amount
+     */
+    public int getFps() {
+        return fps;
+    }
+
+    /**
+     * This method sets frames per second amount.
+     * @param fps
+     *            the frames per second amount
+     */
+    public void setFps(int fps) {
+        this.fps = fps;
+    }
+
+    /**
+     * This method returns the face cull mode.
+     * @return the face cull mode
+     */
+    public FaceCullMode getFaceCullMode() {
+        return faceCullMode;
+    }
+
+    /**
+     * This method sets the face cull mode.
+     * @param faceCullMode
+     *            the face cull mode
+     */
+    public void setFaceCullMode(FaceCullMode faceCullMode) {
+        this.faceCullMode = faceCullMode;
+    }
+
+    /**
+     * This method sets layers to be loaded.
+     * @param layersToLoad
+     *            layers to be loaded
+     */
+    public void setLayersToLoad(int layersToLoad) {
+        this.layersToLoad = layersToLoad;
+    }
+
+    /**
+     * This method returns layers to be loaded.
+     * @return layers to be loaded
+     */
+    public int getLayersToLoad() {
+        return layersToLoad;
+    }
+
+    /**
+     * This method sets the properies loading policy.
+     * By default the value is true.
+     * @param loadObjectProperties
+     *            true to load properties and false to suspend their loading
+     */
+    public void setLoadObjectProperties(boolean loadObjectProperties) {
+        this.loadObjectProperties = loadObjectProperties;
+    }
+
+    /**
+     * @return the current properties loading properties
+     */
+    public boolean isLoadObjectProperties() {
+        return loadObjectProperties;
+    }
+
+    /**
+     * The default value for this parameter is the same as defined by: org.lwjgl.opengl.GL11.GL_MAX_TEXTURE_SIZE.
+     * If by any means this is too large for user's hardware configuration use the 'setMaxTextureSize' method to change that.
+     * @return maximum texture size (width/height)
+     */
+    public int getMaxTextureSize() {
+        return maxTextureSize;
+    }
+
+    /**
+     * This method sets the maximum texture size.
+     * @param maxTextureSize
+     *            the maximum texture size
+     */
+    public void setMaxTextureSize(int maxTextureSize) {
+        this.maxTextureSize = maxTextureSize;
+    }
+
+    /**
+     * This method sets the flag that toggles the generated textures loading.
+     * @param loadGeneratedTextures
+     *            <b>true</b> if generated textures should be loaded and <b>false</b> otherwise
+     */
+    public void setLoadGeneratedTextures(boolean loadGeneratedTextures) {
+        this.loadGeneratedTextures = loadGeneratedTextures;
+    }
+
+    /**
+     * @return tells if the generated textures should be loaded (<b>false</b> is the default value)
+     */
+    public boolean isLoadGeneratedTextures() {
+        return loadGeneratedTextures;
+    }
+
+    /**
+     * Not used any more.
+     * This method sets the asset root path.
+     * @param assetRootPath
+     *            the assets root path
+     */
+    @Deprecated
+    public void setAssetRootPath(String assetRootPath) {
+        this.assetRootPath = assetRootPath;
+    }
+
+    /**
+     * Not used any more.
+     * This method returns the asset root path.
+     * @return the asset root path
+     */
+    @Deprecated
+    public String getAssetRootPath() {
+        return assetRootPath;
+    }
+
+    /**
+     * This method adds features to be loaded.
+     * @param featuresToLoad
+     *            bitwise flag of FeaturesToLoad interface values
+     */
+    @Deprecated
+    public void includeInLoading(int featuresToLoad) {
+        this.featuresToLoad |= featuresToLoad;
+    }
+
+    /**
+     * This method removes features from being loaded.
+     * @param featuresNotToLoad
+     *            bitwise flag of FeaturesToLoad interface values
+     */
+    @Deprecated
+    public void excludeFromLoading(int featuresNotToLoad) {
+        featuresToLoad &= ~featuresNotToLoad;
+    }
+
+    @Deprecated
+    public boolean shouldLoad(int featureToLoad) {
+        return (featuresToLoad & featureToLoad) != 0;
+    }
+
+    /**
+     * This method returns bitwise value of FeaturesToLoad interface value. It describes features that will be loaded by
+     * the blender file loader.
+     * @return features that will be loaded by the blender file loader
+     */
+    @Deprecated
+    public int getFeaturesToLoad() {
+        return featuresToLoad;
+    }
+
+    /**
+     * This method determines if unlinked assets should be loaded.
+     * If not then only objects on selected layers will be loaded and their assets if required.
+     * If yes then all assets will be loaded even if they are on inactive layers or are not linked
+     * to anything.
+     * @return <b>true</b> if unlinked assets should be loaded and <b>false</b> otherwise
+     */
+    public boolean isLoadUnlinkedAssets() {
+        return loadUnlinkedAssets;
+    }
+
+    /**
+     * This method sets if unlinked assets should be loaded.
+     * If not then only objects on selected layers will be loaded and their assets if required.
+     * If yes then all assets will be loaded even if they are on inactive layers or are not linked
+     * to anything.
+     * @param loadUnlinkedAssets
+     *            <b>true</b> if unlinked assets should be loaded and <b>false</b> otherwise
+     */
+    public void setLoadUnlinkedAssets(boolean loadUnlinkedAssets) {
+        this.loadUnlinkedAssets = loadUnlinkedAssets;
+    }
+
+    /**
+     * This method sets the fix up axis state. If set to true then Y is up axis. Otherwise the up i Z axis. By default Y
+     * is up axis.
+     * @param fixUpAxis
+     *            the up axis state variable
+     */
+    public void setFixUpAxis(boolean fixUpAxis) {
+        this.fixUpAxis = fixUpAxis;
+    }
+
+    /**
+     * This method returns the fix up axis state. If set to true then Y is up axis. Otherwise the up i Z axis. By
+     * default Y is up axis.
+     * @return the up axis state variable
+     */
+    public boolean isFixUpAxis() {
+        return fixUpAxis;
+    }
+
+    /**
+     * This method sets the generated textures resolution.
+     * @param generatedTexturePPU
+     *            the generated textures resolution
+     */
+    public void setGeneratedTexturePPU(int generatedTexturePPU) {
+        this.generatedTexturePPU = generatedTexturePPU;
+    }
+
+    /**
+     * @return the generated textures resolution
+     */
+    public int getGeneratedTexturePPU() {
+        return generatedTexturePPU;
+    }
+
+    /**
+     * @return mipmaps generation method
+     */
+    public MipmapGenerationMethod getMipmapGenerationMethod() {
+        return mipmapGenerationMethod;
+    }
+
+    /**
+     * @param mipmapGenerationMethod
+     *            mipmaps generation method
+     */
+    public void setMipmapGenerationMethod(MipmapGenerationMethod mipmapGenerationMethod) {
+        this.mipmapGenerationMethod = mipmapGenerationMethod;
+    }
+
+    /**
+     * @return the size of the generated textures for the sky (used if no flat textures are applied)
+     */
+    public int getSkyGeneratedTextureSize() {
+        return skyGeneratedTextureSize;
+    }
+
+    /**
+     * @param skyGeneratedTextureSize
+     *            the size of the generated textures for the sky (used if no flat textures are applied)
+     */
+    public void setSkyGeneratedTextureSize(int skyGeneratedTextureSize) {
+        if (skyGeneratedTextureSize <= 0) {
+            throw new IllegalArgumentException("The texture size must be a positive value (the value given as a parameter: " + skyGeneratedTextureSize + ")!");
+        }
+        this.skyGeneratedTextureSize = skyGeneratedTextureSize;
+    }
+
+    /**
+     * @return the radius of a shape that will be used while creating the generated texture for the sky, the higher it is the larger part of the texture will be seen
+     */
+    public float getSkyGeneratedTextureRadius() {
+        return skyGeneratedTextureRadius;
+    }
+
+    /**
+     * @param skyGeneratedTextureRadius
+     *            the radius of a shape that will be used while creating the generated texture for the sky, the higher it is the larger part of the texture will be seen
+     */
+    public void setSkyGeneratedTextureRadius(float skyGeneratedTextureRadius) {
+        this.skyGeneratedTextureRadius = skyGeneratedTextureRadius;
+    }
+
+    /**
+     * @return the shape against which the generated texture for the sky will be created (by default it is a sphere).
+     */
+    public SkyGeneratedTextureShape getSkyGeneratedTextureShape() {
+        return skyGeneratedTextureShape;
+    }
+
+    /**
+     * @param skyGeneratedTextureShape
+     *            the shape against which the generated texture for the sky will be created
+     */
+    public void setSkyGeneratedTextureShape(SkyGeneratedTextureShape skyGeneratedTextureShape) {
+        if (skyGeneratedTextureShape == null) {
+            throw new IllegalArgumentException("The sky generated shape type cannot be null!");
+        }
+        this.skyGeneratedTextureShape = skyGeneratedTextureShape;
+    }
+
+    /**
+     * If set to true, then textures of the same mapping type will be merged together
+     * and textures that in the final result will never be visible - will be discarded.
+     * @param optimiseTextures
+     *            the variable that tells if the textures should be optimised or not
+     */
+    public void setOptimiseTextures(boolean optimiseTextures) {
+        this.optimiseTextures = optimiseTextures;
+    }
+
+    /**
+     * @return the variable that tells if the textures should be optimised or not (by default the optimisation is disabled)
+     */
+    public boolean isOptimiseTextures() {
+        return optimiseTextures;
+    }
+
+    /**
+     * Sets the way the animations will be matched with skeletons.
+     * 
+     * @param animationMatchMethod
+     *            the way the animations will be matched with skeletons
+     */
+    public void setAnimationMatchMethod(AnimationMatchMethod animationMatchMethod) {
+        this.animationMatchMethod = animationMatchMethod;
+    }
+
+    /**
+     * @return the way the animations will be matched with skeletons
+     */
+    public AnimationMatchMethod getAnimationMatchMethod() {
+        return animationMatchMethod;
+    }
+
+    /**
+     * @return the size of points that are loaded and do not belong to any edge of the mesh
+     */
+    public float getPointsSize() {
+        return pointsSize;
+    }
+
+    /**
+     * Sets the size of points that are loaded and do not belong to any edge of the mesh.
+     * @param pointsSize
+     *            The size of points that are loaded and do not belong to any edge of the mesh
+     */
+    public void setPointsSize(float pointsSize) {
+        this.pointsSize = pointsSize;
+    }
+
+    /**
+     * @return the width of edges that are loaded from the mesh and do not belong to any face
+     */
+    public float getLinesWidth() {
+        return linesWidth;
+    }
+
+    /**
+     * Sets the width of edges that are loaded from the mesh and do not belong to any face.
+     * @param linesWidth
+     *            the width of edges that are loaded from the mesh and do not belong to any face
+     */
+    public void setLinesWidth(float linesWidth) {
+        this.linesWidth = linesWidth;
+    }
+
+    /**
+     * This method sets the name of the WORLD data block that should be used during file loading. By default the name is
+     * not set. If no name is set or the given name does not occur in the file - the first WORLD data block will be used
+     * during loading (assuming any exists in the file).
+     * @param usedWorld
+     *            the name of the WORLD block used during loading
+     */
+    public void setUsedWorld(String usedWorld) {
+        this.usedWorld = usedWorld;
+    }
+
+    /**
+     * This method returns the name of the WORLD data block that should be used during file loading.
+     * @return the name of the WORLD block used during loading
+     */
+    public String getUsedWorld() {
+        return usedWorld;
+    }
+
+    /**
+     * This method sets the default material for objects.
+     * @param defaultMaterial
+     *            the default material
+     */
+    public void setDefaultMaterial(Material defaultMaterial) {
+        this.defaultMaterial = defaultMaterial;
+    }
+
+    /**
+     * This method returns the default material.
+     * @return the default material
+     */
+    public Material getDefaultMaterial() {
+        return defaultMaterial;
+    }
+
+    @Override
+    public void write(JmeExporter e) throws IOException {
+        super.write(e);
+        OutputCapsule oc = e.getCapsule(this);
+        oc.write(fps, "fps", DEFAULT_FPS);
+        oc.write(featuresToLoad, "features-to-load", FeaturesToLoad.ALL);
+        oc.write(loadUnlinkedAssets, "load-unlinked-assets", false);
+        oc.write(assetRootPath, "asset-root-path", null);
+        oc.write(fixUpAxis, "fix-up-axis", true);
+        oc.write(generatedTexturePPU, "generated-texture-ppu", 128);
+        oc.write(usedWorld, "used-world", null);
+        oc.write(defaultMaterial, "default-material", null);
+        oc.write(faceCullMode, "face-cull-mode", FaceCullMode.Off);
+        oc.write(layersToLoad, "layers-to-load", -1);
+        oc.write(mipmapGenerationMethod, "mipmap-generation-method", MipmapGenerationMethod.GENERATE_WHEN_NEEDED);
+        oc.write(skyGeneratedTextureSize, "sky-generated-texture-size", 1000);
+        oc.write(skyGeneratedTextureRadius, "sky-generated-texture-radius", 1f);
+        oc.write(skyGeneratedTextureShape, "sky-generated-texture-shape", SkyGeneratedTextureShape.SPHERE);
+        oc.write(optimiseTextures, "optimise-textures", false);
+        oc.write(animationMatchMethod, "animation-match-method", AnimationMatchMethod.AT_LEAST_ONE_NAME_MATCH);
+        oc.write(pointsSize, "points-size", 1);
+        oc.write(linesWidth, "lines-width", 1);
+    }
+
+    @Override
+    public void read(JmeImporter e) throws IOException {
+        super.read(e);
+        InputCapsule ic = e.getCapsule(this);
+        fps = ic.readInt("fps", DEFAULT_FPS);
+        featuresToLoad = ic.readInt("features-to-load", FeaturesToLoad.ALL);
+        loadUnlinkedAssets = ic.readBoolean("load-unlinked-assets", false);
+        assetRootPath = ic.readString("asset-root-path", null);
+        fixUpAxis = ic.readBoolean("fix-up-axis", true);
+        generatedTexturePPU = ic.readInt("generated-texture-ppu", 128);
+        usedWorld = ic.readString("used-world", null);
+        defaultMaterial = (Material) ic.readSavable("default-material", null);
+        faceCullMode = ic.readEnum("face-cull-mode", FaceCullMode.class, FaceCullMode.Off);
+        layersToLoad = ic.readInt("layers-to=load", -1);
+        mipmapGenerationMethod = ic.readEnum("mipmap-generation-method", MipmapGenerationMethod.class, MipmapGenerationMethod.GENERATE_WHEN_NEEDED);
+        skyGeneratedTextureSize = ic.readInt("sky-generated-texture-size", 1000);
+        skyGeneratedTextureRadius = ic.readFloat("sky-generated-texture-radius", 1f);
+        skyGeneratedTextureShape = ic.readEnum("sky-generated-texture-shape", SkyGeneratedTextureShape.class, SkyGeneratedTextureShape.SPHERE);
+        optimiseTextures = ic.readBoolean("optimise-textures", false);
+        animationMatchMethod = ic.readEnum("animation-match-method", AnimationMatchMethod.class, AnimationMatchMethod.AT_LEAST_ONE_NAME_MATCH);
+        pointsSize = ic.readFloat("points-size", 1);
+        linesWidth = ic.readFloat("lines-width", 1);
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = super.hashCode();
+        result = prime * result + (animationMatchMethod == null ? 0 : animationMatchMethod.hashCode());
+        result = prime * result + (assetRootPath == null ? 0 : assetRootPath.hashCode());
+        result = prime * result + (defaultMaterial == null ? 0 : defaultMaterial.hashCode());
+        result = prime * result + (faceCullMode == null ? 0 : faceCullMode.hashCode());
+        result = prime * result + featuresToLoad;
+        result = prime * result + (fixUpAxis ? 1231 : 1237);
+        result = prime * result + fps;
+        result = prime * result + generatedTexturePPU;
+        result = prime * result + layersToLoad;
+        result = prime * result + (loadGeneratedTextures ? 1231 : 1237);
+        result = prime * result + (loadObjectProperties ? 1231 : 1237);
+        result = prime * result + (loadUnlinkedAssets ? 1231 : 1237);
+        result = prime * result + maxTextureSize;
+        result = prime * result + (mipmapGenerationMethod == null ? 0 : mipmapGenerationMethod.hashCode());
+        result = prime * result + (optimiseTextures ? 1231 : 1237);
+        result = prime * result + Float.floatToIntBits(skyGeneratedTextureRadius);
+        result = prime * result + (skyGeneratedTextureShape == null ? 0 : skyGeneratedTextureShape.hashCode());
+        result = prime * result + skyGeneratedTextureSize;
+        result = prime * result + (usedWorld == null ? 0 : usedWorld.hashCode());
+        result = prime * result + (int) pointsSize;
+        result = prime * result + (int) linesWidth;
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj instanceof BlenderKey) {
+            return false;
+        }
+        BlenderKey other = (BlenderKey) obj;
+        if (animationMatchMethod != other.animationMatchMethod) {
+            return false;
+        }
+        if (assetRootPath == null) {
+            if (other.assetRootPath != null) {
+                return false;
+            }
+        } else if (!assetRootPath.equals(other.assetRootPath)) {
+            return false;
+        }
+        if (defaultMaterial == null) {
+            if (other.defaultMaterial != null) {
+                return false;
+            }
+        } else if (!defaultMaterial.equals(other.defaultMaterial)) {
+            return false;
+        }
+        if (faceCullMode != other.faceCullMode) {
+            return false;
+        }
+        if (featuresToLoad != other.featuresToLoad) {
+            return false;
+        }
+        if (fixUpAxis != other.fixUpAxis) {
+            return false;
+        }
+        if (fps != other.fps) {
+            return false;
+        }
+        if (generatedTexturePPU != other.generatedTexturePPU) {
+            return false;
+        }
+        if (layersToLoad != other.layersToLoad) {
+            return false;
+        }
+        if (loadGeneratedTextures != other.loadGeneratedTextures) {
+            return false;
+        }
+        if (loadObjectProperties != other.loadObjectProperties) {
+            return false;
+        }
+        if (loadUnlinkedAssets != other.loadUnlinkedAssets) {
+            return false;
+        }
+        if (maxTextureSize != other.maxTextureSize) {
+            return false;
+        }
+        if (mipmapGenerationMethod != other.mipmapGenerationMethod) {
+            return false;
+        }
+        if (optimiseTextures != other.optimiseTextures) {
+            return false;
+        }
+        if (Float.floatToIntBits(skyGeneratedTextureRadius) != Float.floatToIntBits(other.skyGeneratedTextureRadius)) {
+            return false;
+        }
+        if (skyGeneratedTextureShape != other.skyGeneratedTextureShape) {
+            return false;
+        }
+        if (skyGeneratedTextureSize != other.skyGeneratedTextureSize) {
+            return false;
+        }
+        if (usedWorld == null) {
+            if (other.usedWorld != null) {
+                return false;
+            }
+        } else if (!usedWorld.equals(other.usedWorld)) {
+            return false;
+        }
+        if (pointsSize != other.pointsSize) {
+            return false;
+        }
+        if (linesWidth != other.linesWidth) {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * This enum tells the importer if the mipmaps for textures will be generated by jme. <li>NEVER_GENERATE and ALWAYS_GENERATE are quite understandable <li>GENERATE_WHEN_NEEDED is an option that checks if the texture had 'Generate mipmaps' option set in blender, mipmaps are generated only when the option is set
+     * @author Marcin Roguski (Kaelthas)
+     */
+    public static enum MipmapGenerationMethod {
+        NEVER_GENERATE, ALWAYS_GENERATE, GENERATE_WHEN_NEEDED;
+    }
+
+    /**
+     * This interface describes the features of the scene that are to be loaded.
+     * @deprecated this interface is deprecated and is not used anymore; to ensure the loading models consistency
+     *             everything must be loaded because in blender one feature might depend on another
+     * @author Marcin Roguski (Kaelthas)
+     */
+    @Deprecated
+    public static interface FeaturesToLoad {
+
+        int SCENES     = 0x0000FFFF;
+        int OBJECTS    = 0x0000000B;
+        int ANIMATIONS = 0x00000004;
+        int MATERIALS  = 0x00000003;
+        int TEXTURES   = 0x00000001;
+        int CAMERAS    = 0x00000020;
+        int LIGHTS     = 0x00000010;
+        int WORLD      = 0x00000040;
+        int ALL        = 0xFFFFFFFF;
+    }
+
+    /**
+     * The shape againts which the sky generated texture will be created.
+     * 
+     * @author Marcin Roguski (Kaelthas)
+     */
+    public static enum SkyGeneratedTextureShape {
+        CUBE, SPHERE;
+    }
+
+    /**
+     * This enum describes which animations should be attached to which armature.
+     * Blender does not store the mapping between action and armature. That is why the importer
+     * will try to match those by comparing bone name of the armature with the channel names
+     * int the actions.
+     * 
+     * @author Marcin Roguski (Kaelthas)
+     */
+    public static enum AnimationMatchMethod {
+        /**
+         * Animation is matched with skeleton when at leas one bone name matches the name of the action channel.
+         * All the bones that do not have their corresponding channel in the animation will not get the proper tracks for
+         * this particulat animation.
+         * Also the channel will not be used for the animation if it does not find the proper bone name.
+         */
+        AT_LEAST_ONE_NAME_MATCH,
+        /**
+         * Animation is matched when all action names are covered by the target names (bone names or the name of the
+         * animated spatial.
+         */
+        ALL_NAMES_MATCH;
+    }
+}

jme3-blender/src/main/java/com/jme3/asset/GeneratedTextureKey.java

@@ -29,36 +29,41 @@
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-package com.jme3.shader;
-
-import com.jme3.asset.AssetManager;
-import com.jme3.material.ShaderGenerationInfo;
-import com.jme3.shader.Shader.ShaderType;
 
+package com.jme3.asset;
 
 /**
- * This shader Generator can generate Vertex and Fragment shaders from
+ * This key is mostly used to distinguish between textures that are loaded from
- * ShaderNodes for GLESSL 3.0
+ * the given assets and those being generated automatically. Every generated
- * Nowdays it's just a subclass of Glsl150ShaderGenerator overriding the version
+ * texture will have this kind of key attached.
- * string because GLSL 1.5 is mostly compatible with GLESSL 3.0
+ * 
- *
+ * @author Marcin Roguski (Kaelthas)
- * @author Nehon
- * @author Joliver82
  */
-public class Glsl300ShaderGenerator extends Glsl150ShaderGenerator {
+public class GeneratedTextureKey extends TextureKey {
 
     /**
-     * Creates a Glsl300ShaderGenerator
+     * Constructor. Stores the name. Extension and folder name are empty
-     *
+     * strings.
-     * @param assetManager the assetmanager
+     * 
+     * @param name
+     *            the name of the texture
      */
-    public Glsl300ShaderGenerator(AssetManager assetManager) {
+    public GeneratedTextureKey(String name) {
-        super(assetManager);
+        super(name);
     }
 
     @Override
-    protected String getLanguageAndVersion(ShaderType type) {
+    public String getExtension() {
-        return "GLSL300";
+        return "";
     }
 
+    @Override
+    public String getFolder() {
+        return "";
+    }
+
+    @Override
+    public String toString() {
+        return "Generated texture [" + name + "]";
+    }
 }

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/AbstractBlenderHelper.java

@@ -0,0 +1,193 @@
+/*
+ * Copyright (c) 2009-2012 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.scene.plugins.blender;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import com.jme3.asset.AssetNotFoundException;
+import com.jme3.asset.BlenderKey;
+import com.jme3.export.Savable;
+import com.jme3.math.FastMath;
+import com.jme3.math.Quaternion;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.plugins.blender.BlenderContext.LoadedDataType;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.Pointer;
+import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.blender.objects.Properties;
+
+/**
+ * A purpose of the helper class is to split calculation code into several classes. Each helper after use should be cleared because it can
+ * hold the state of the calculations.
+ * @author Marcin Roguski
+ */
+public abstract class AbstractBlenderHelper {
+    private static final Logger LOGGER = Logger.getLogger(AbstractBlenderHelper.class.getName());
+
+    /** The blender context. */
+    protected BlenderContext    blenderContext;
+    /** The version of the blend file. */
+    protected final int         blenderVersion;
+    /** This variable indicates if the Y asxis is the UP axis or not. */
+    protected boolean           fixUpAxis;
+    /** Quaternion used to rotate data when Y is up axis. */
+    protected Quaternion        upAxisRotationQuaternion;
+
+    /**
+     * This constructor parses the given blender version and stores the result. Some functionalities may differ in different blender
+     * versions.
+     * @param blenderVersion
+     *            the version read from the blend file
+     * @param blenderContext
+     *            the blender context
+     */
+    public AbstractBlenderHelper(String blenderVersion, BlenderContext blenderContext) {
+        this.blenderVersion = Integer.parseInt(blenderVersion);
+        this.blenderContext = blenderContext;
+        fixUpAxis = blenderContext.getBlenderKey().isFixUpAxis();
+        if (fixUpAxis) {
+            upAxisRotationQuaternion = new Quaternion().fromAngles(-FastMath.HALF_PI, 0, 0);
+        }
+    }
+
+    /**
+     * This method loads the properties if they are available and defined for the structure.
+     * @param structure
+     *            the structure we read the properties from
+     * @param blenderContext
+     *            the blender context
+     * @return loaded properties or null if they are not available
+     * @throws BlenderFileException
+     *             an exception is thrown when the blend file is somehow corrupted
+     */
+    protected Properties loadProperties(Structure structure, BlenderContext blenderContext) throws BlenderFileException {
+        Properties properties = null;
+        Structure id = (Structure) structure.getFieldValue("ID");
+        if (id != null) {
+            Pointer pProperties = (Pointer) id.getFieldValue("properties");
+            if (pProperties.isNotNull()) {
+                Structure propertiesStructure = pProperties.fetchData().get(0);
+                properties = new Properties();
+                properties.load(propertiesStructure, blenderContext);
+            }
+        }
+        return properties;
+    }
+
+    /**
+     * The method applies properties to the given spatial. The Properties
+     * instance cannot be directly applied because the end-user might not have
+     * the blender plugin jar file and thus receive ClassNotFoundException. The
+     * values are set by name instead.
+     * 
+     * @param spatial
+     *            the spatial that is to have properties applied
+     * @param properties
+     *            the properties to be applied
+     */
+    public void applyProperties(Spatial spatial, Properties properties) {
+        List<String> propertyNames = properties.getSubPropertiesNames();
+        if (propertyNames != null && propertyNames.size() > 0) {
+            for (String propertyName : propertyNames) {
+                Object value = properties.findValue(propertyName);
+                if (value instanceof Savable || value instanceof Boolean || value instanceof String || value instanceof Float || value instanceof Integer || value instanceof Long) {
+                    spatial.setUserData(propertyName, value);
+                } else if (value instanceof Double) {
+                    spatial.setUserData(propertyName, ((Double) value).floatValue());
+                } else if (value instanceof int[]) {
+                    spatial.setUserData(propertyName, Arrays.toString((int[]) value));
+                } else if (value instanceof float[]) {
+                    spatial.setUserData(propertyName, Arrays.toString((float[]) value));
+                } else if (value instanceof double[]) {
+                    spatial.setUserData(propertyName, Arrays.toString((double[]) value));
+                }
+            }
+        }
+    }
+
+    /**
+     * The method loads library of a given ID from linked blender file.
+     * @param id
+     *            the ID of the linked feature (it contains its name and blender path)
+     * @return loaded feature or null if none was found
+     * @throws BlenderFileException
+     *             and exception is throw when problems with reading a blend file occur
+     */
+    protected Object loadLibrary(Structure id) throws BlenderFileException {
+        Pointer pLib = (Pointer) id.getFieldValue("lib");
+        if (pLib.isNotNull()) {
+            String fullName = id.getFieldValue("name").toString();// we need full name with the prefix
+            String nameOfFeatureToLoad = id.getName();
+            Structure library = pLib.fetchData().get(0);
+            String path = library.getFieldValue("filepath").toString();
+
+            if (!blenderContext.getLinkedFeatures().keySet().contains(path)) {
+                Spatial loadedAsset = null;
+                BlenderKey blenderKey = new BlenderKey(path);
+                blenderKey.setLoadUnlinkedAssets(true);
+                try {
+                    loadedAsset = blenderContext.getAssetManager().loadAsset(blenderKey);
+                } catch (AssetNotFoundException e) {
+                    LOGGER.log(Level.FINEST, "Cannot locate linked resource at path: {0}.", path);
+                }
+                
+                if (loadedAsset != null) {
+                    Map<String, Map<String, Object>> linkedData = loadedAsset.getUserData("linkedData");
+                    
+                    for (Entry<String, Map<String, Object>> entry : linkedData.entrySet()) {
+                        String linkedDataFilePath = "this".equals(entry.getKey()) ? path : entry.getKey();
+                        blenderContext.getLinkedFeatures().put(linkedDataFilePath, entry.getValue());
+                    }
+                } else {
+                    LOGGER.log(Level.WARNING, "No features loaded from path: {0}.", path);
+                }
+            }
+
+            Object result = blenderContext.getLinkedFeature(path, fullName);
+            if (result == null) {
+                LOGGER.log(Level.WARNING, "Could NOT find asset named {0} in the library of path: {1}.", new Object[] { nameOfFeatureToLoad, path });
+            } else {
+                blenderContext.addLoadedFeatures(id.getOldMemoryAddress(), LoadedDataType.STRUCTURE, id);
+                blenderContext.addLoadedFeatures(id.getOldMemoryAddress(), LoadedDataType.FEATURE, result);
+            }
+            return result;
+        } else {
+            LOGGER.warning("Library link points to nothing!");
+        }
+        return null;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/BlenderContext.java

@@ -0,0 +1,767 @@
+/*
+ * Copyright (c) 2009-2019 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.scene.plugins.blender;
+
+import java.util.ArrayList;
+import java.util.EmptyStackException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Stack;
+
+import com.jme3.animation.Animation;
+import com.jme3.animation.Bone;
+import com.jme3.animation.Skeleton;
+import com.jme3.asset.AssetManager;
+import com.jme3.asset.BlenderKey;
+import com.jme3.light.Light;
+import com.jme3.material.Material;
+import com.jme3.math.ColorRGBA;
+import com.jme3.post.Filter;
+import com.jme3.renderer.Camera;
+import com.jme3.scene.Node;
+import com.jme3.scene.plugins.blender.animations.BlenderAction;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
+import com.jme3.scene.plugins.blender.constraints.Constraint;
+import com.jme3.scene.plugins.blender.file.BlenderInputStream;
+import com.jme3.scene.plugins.blender.file.DnaBlockData;
+import com.jme3.scene.plugins.blender.file.FileBlockHeader;
+import com.jme3.scene.plugins.blender.file.FileBlockHeader.BlockCode;
+import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.blender.materials.MaterialContext;
+import com.jme3.scene.plugins.blender.meshes.TemporalMesh;
+import com.jme3.texture.Texture;
+
+/**
+ * The class that stores temporary data and manages it during loading the belnd
+ * file. This class is intended to be used in a single loading thread. It holds
+ * the state of loading operations.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class BlenderContext {
+    /** The blender file version. */
+    private int                                    blenderVersion;
+    /** The blender key. */
+    private BlenderKey                             blenderKey;
+    /** The header of the file block. */
+    private DnaBlockData                           dnaBlockData;
+    /** The scene structure. */
+    private Structure                              sceneStructure;
+    /** The input stream of the blend file. */
+    private BlenderInputStream                     inputStream;
+    /** The asset manager. */
+    private AssetManager                           assetManager;
+    /** The blocks read from the file. */
+    protected List<FileBlockHeader>                blocks                 = new ArrayList<FileBlockHeader>();
+    /**
+     * A map containing the file block headers. The key is the old memory address.
+     */
+    private Map<Long, FileBlockHeader>             fileBlockHeadersByOma  = new HashMap<Long, FileBlockHeader>();
+    /** A map containing the file block headers. The key is the block code. */
+    private Map<BlockCode, List<FileBlockHeader>>  fileBlockHeadersByCode = new HashMap<BlockCode, List<FileBlockHeader>>();
+    /**
+     * This map stores the loaded features by their old memory address. The
+     * first object in the value table is the loaded structure and the second -
+     * the structure already converted into proper data.
+     */
+    private Map<Long, Map<LoadedDataType, Object>> loadedFeatures         = new HashMap<Long, Map<LoadedDataType, Object>>();
+    /** Features loaded from external blender files. The key is the file path and the value is a map between feature name and loaded feature. */
+    private Map<String, Map<String, Object>>       linkedFeatures         = new HashMap<String, Map<String, Object>>();
+    /** A stack that hold the parent structure of currently loaded feature. */
+    private Stack<Structure>                       parentStack            = new Stack<Structure>();
+    /** A list of constraints for the specified object. */
+    protected Map<Long, List<Constraint>>          constraints            = new HashMap<Long, List<Constraint>>();
+    /** Animations loaded for features. */
+    private Map<Long, List<Animation>>             animations             = new HashMap<Long, List<Animation>>();
+    /** Loaded skeletons. */
+    private Map<Long, Skeleton>                    skeletons              = new HashMap<Long, Skeleton>();
+    /** A map between skeleton and node it modifies. */
+    private Map<Skeleton, Node>                    nodesWithSkeletons     = new HashMap<Skeleton, Node>();
+    /** A map of bone contexts. */
+    protected Map<Long, BoneContext>               boneContexts           = new HashMap<Long, BoneContext>();
+    /** A map og helpers that perform loading. */
+    private Map<String, AbstractBlenderHelper>     helpers                = new HashMap<String, AbstractBlenderHelper>();
+    /** Markers used by loading classes to store some custom data. This is made to avoid putting this data into user properties. */
+    private Map<String, Map<Object, Object>>       markers                = new HashMap<String, Map<Object, Object>>();
+    /** A map of blender actions. The key is the action name and the value is the action itself. */
+    private Map<String, BlenderAction>             actions                = new HashMap<String, BlenderAction>();
+
+    /**
+     * This method sets the blender file version.
+     * 
+     * @param blenderVersion
+     *            the blender file version
+     */
+    public void setBlenderVersion(String blenderVersion) {
+        this.blenderVersion = Integer.parseInt(blenderVersion);
+    }
+
+    /**
+     * @return the blender file version
+     */
+    public int getBlenderVersion() {
+        return blenderVersion;
+    }
+
+    /**
+     * This method sets the blender key.
+     * 
+     * @param blenderKey
+     *            the blender key
+     */
+    public void setBlenderKey(BlenderKey blenderKey) {
+        this.blenderKey = blenderKey;
+    }
+
+    /**
+     * This method returns the blender key.
+     * 
+     * @return the blender key
+     */
+    public BlenderKey getBlenderKey() {
+        return blenderKey;
+    }
+
+    /**
+     * This method sets the dna block data.
+     * 
+     * @param dnaBlockData
+     *            the dna block data
+     */
+    public void setBlockData(DnaBlockData dnaBlockData) {
+        this.dnaBlockData = dnaBlockData;
+    }
+
+    /**
+     * This method returns the dna block data.
+     * 
+     * @return the dna block data
+     */
+    public DnaBlockData getDnaBlockData() {
+        return dnaBlockData;
+    }
+
+    /**
+     * This method sets the scene structure data.
+     * 
+     * @param sceneStructure
+     *            the scene structure data
+     */
+    public void setSceneStructure(Structure sceneStructure) {
+        this.sceneStructure = sceneStructure;
+    }
+
+    /**
+     * This method returns the scene structure data.
+     * 
+     * @return the scene structure data
+     */
+    public Structure getSceneStructure() {
+        return sceneStructure;
+    }
+
+    /**
+     * This method returns the asset manager.
+     * 
+     * @return the asset manager
+     */
+    public AssetManager getAssetManager() {
+        return assetManager;
+    }
+
+    /**
+     * This method sets the asset manager.
+     * 
+     * @param assetManager
+     *            the asset manager
+     */
+    public void setAssetManager(AssetManager assetManager) {
+        this.assetManager = assetManager;
+    }
+
+    /**
+     * This method returns the input stream of the blend file.
+     * 
+     * @return the input stream of the blend file
+     */
+    public BlenderInputStream getInputStream() {
+        return inputStream;
+    }
+
+    /**
+     * This method sets the input stream of the blend file.
+     * 
+     * @param inputStream
+     *            the input stream of the blend file
+     */
+    public void setInputStream(BlenderInputStream inputStream) {
+        this.inputStream = inputStream;
+    }
+
+    /**
+     * This method adds a file block header to the map. Its old memory address
+     * is the key.
+     * 
+     * @param oldMemoryAddress
+     *            the address of the block header
+     * @param fileBlockHeader
+     *            the block header to store
+     */
+    public void addFileBlockHeader(Long oldMemoryAddress, FileBlockHeader fileBlockHeader) {
+        blocks.add(fileBlockHeader);
+        fileBlockHeadersByOma.put(oldMemoryAddress, fileBlockHeader);
+        List<FileBlockHeader> headers = fileBlockHeadersByCode.get(fileBlockHeader.getCode());
+        if (headers == null) {
+            headers = new ArrayList<FileBlockHeader>();
+            fileBlockHeadersByCode.put(fileBlockHeader.getCode(), headers);
+        }
+        headers.add(fileBlockHeader);
+    }
+
+    /**
+     * @return the block headers
+     */
+    public List<FileBlockHeader> getBlocks() {
+        return blocks;
+    }
+
+    /**
+     * This method returns the block header of a given memory address. If the
+     * header is not present then null is returned.
+     * 
+     * @param oldMemoryAddress
+     *            the address of the block header
+     * @return loaded header or null if it was not yet loaded
+     */
+    public FileBlockHeader getFileBlock(Long oldMemoryAddress) {
+        return fileBlockHeadersByOma.get(oldMemoryAddress);
+    }
+
+    /**
+     * This method returns a list of file blocks' headers of a specified code.
+     * 
+     * @param code
+     *            the code of file blocks
+     * @return a list of file blocks' headers of a specified code
+     */
+    public List<FileBlockHeader> getFileBlocks(BlockCode code) {
+        return fileBlockHeadersByCode.get(code);
+    }
+
+    /**
+     * This method adds a helper instance to the helpers' map.
+     * 
+     * @param <T>
+     *            the type of the helper
+     * @param clazz
+     *            helper's class definition
+     * @param helper
+     *            the helper instance
+     */
+    public <T> void putHelper(Class<T> clazz, AbstractBlenderHelper helper) {
+        helpers.put(clazz.getSimpleName(), helper);
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T> T getHelper(Class<?> clazz) {
+        return (T) helpers.get(clazz.getSimpleName());
+    }
+
+    /**
+     * This method adds a loaded feature to the map. The key is its unique old
+     * memory address.
+     * 
+     * @param oldMemoryAddress
+     *            the address of the feature
+     * @param featureDataType
+     * @param feature
+     *            the feature we want to store
+     */
+    public void addLoadedFeatures(Long oldMemoryAddress, LoadedDataType featureDataType, Object feature) {
+        if (oldMemoryAddress == null || featureDataType == null || feature == null) {
+            throw new IllegalArgumentException("One of the given arguments is null!");
+        }
+        Map<LoadedDataType, Object> map = loadedFeatures.get(oldMemoryAddress);
+        if (map == null) {
+            map = new HashMap<BlenderContext.LoadedDataType, Object>();
+            loadedFeatures.put(oldMemoryAddress, map);
+        }
+        map.put(featureDataType, feature);
+    }
+
+    /**
+     * This method returns the feature of a given memory address. If the feature
+     * is not yet loaded then null is returned.
+     * 
+     * @param oldMemoryAddress
+     *            the address of the feature
+     * @param loadedFeatureDataType
+     *            the type of data we want to retrieve it can be either filled
+     *            structure or already converted feature
+     * @return loaded feature or null if it was not yet loaded
+     */
+    public Object getLoadedFeature(Long oldMemoryAddress, LoadedDataType loadedFeatureDataType) {
+        Map<LoadedDataType, Object> result = loadedFeatures.get(oldMemoryAddress);
+        if (result != null) {
+            return result.get(loadedFeatureDataType);
+        }
+        return null;
+    }
+
+    /**
+     * The method adds linked content to the blender context.
+     * @param blenderFilePath
+     *            the path of linked blender file
+     * @param featureGroup
+     *            the linked feature group (ie. scenes, materials, meshes, etc.)
+     * @param feature
+     *            the linked feature
+     */
+    @Deprecated
+    public void addLinkedFeature(String blenderFilePath, String featureGroup, Object feature) {
+        // the method is deprecated and empty at the moment
+    }
+
+    /**
+     * The method returns linked feature of a given name from the specified blender path.
+     * @param blenderFilePath
+     *            the blender file path
+     * @param featureName
+     *            the feature name we want to get
+     * @return linked feature or null if none was found
+     */
+    @SuppressWarnings("unchecked")
+    public Object getLinkedFeature(String blenderFilePath, String featureName) {
+        Map<String, Object> linkedFeatures = this.linkedFeatures.get(blenderFilePath);
+        if(linkedFeatures != null) {
+            String namePrefix = (featureName.charAt(0) + "" + featureName.charAt(1)).toUpperCase();
+            featureName = featureName.substring(2);
+            
+            if("SC".equals(namePrefix)) {
+                List<Node> scenes = (List<Node>) linkedFeatures.get("scenes");
+                if(scenes != null) {
+                    for(Node scene : scenes) {
+                        if(featureName.equals(scene.getName())) {
+                            return scene;
+                        }
+                    }
+                }
+            } else if("OB".equals(namePrefix)) {
+                List<Node> features = (List<Node>) linkedFeatures.get("objects");
+                if(features != null) {
+                    for(Node feature : features) {
+                        if(featureName.equals(feature.getName())) {
+                            return feature;
+                        }
+                    }
+                }
+            } else if("ME".equals(namePrefix)) {
+                List<TemporalMesh> temporalMeshes = (List<TemporalMesh>) linkedFeatures.get("meshes");
+                if(temporalMeshes != null) {
+                    for(TemporalMesh temporalMesh : temporalMeshes) {
+                        if(featureName.equals(temporalMesh.getName())) {
+                            return temporalMesh;
+                        }
+                    }
+                }
+            } else if("MA".equals(namePrefix)) {
+                List<MaterialContext> features = (List<MaterialContext>) linkedFeatures.get("materials");
+                if(features != null) {
+                    for(MaterialContext feature : features) {
+                        if(featureName.equals(feature.getName())) {
+                            return feature;
+                        }
+                    }
+                }
+            } else if("TX".equals(namePrefix)) {
+                List<Texture> features = (List<Texture>) linkedFeatures.get("textures");
+                if(features != null) {
+                    for(Texture feature : features) {
+                        if(featureName.equals(feature.getName())) {
+                            return feature;
+                        }
+                    }
+                }
+            } else if("IM".equals(namePrefix)) {
+                List<Texture> features = (List<Texture>) linkedFeatures.get("images");
+                if(features != null) {
+                    for(Texture feature : features) {
+                        if(featureName.equals(feature.getName())) {
+                            return feature;
+                        }
+                    }
+                }
+            } else if("AC".equals(namePrefix)) {
+                List<Animation> features = (List<Animation>) linkedFeatures.get("animations");
+                if(features != null) {
+                    for(Animation feature : features) {
+                        if(featureName.equals(feature.getName())) {
+                            return feature;
+                        }
+                    }
+                }
+            } else if("CA".equals(namePrefix)) {
+                List<Camera> features = (List<Camera>) linkedFeatures.get("cameras");
+                if(features != null) {
+                    for(Camera feature : features) {
+                        if(featureName.equals(feature.getName())) {
+                            return feature;
+                        }
+                    }
+                }
+            } else if("LA".equals(namePrefix)) {
+                List<Light> features = (List<Light>) linkedFeatures.get("lights");
+                if(features != null) {
+                    for(Light feature : features) {
+                        if(featureName.equals(feature.getName())) {
+                            return feature;
+                        }
+                    }
+                }
+            } else if("FI".equals(featureName)) {
+                List<Filter> features = (List<Filter>) linkedFeatures.get("lights");
+                if(features != null) {
+                    for(Filter feature : features) {
+                        if(featureName.equals(feature.getName())) {
+                            return feature;
+                        }
+                    }
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * @return all linked features for the current blend file
+     */
+    public Map<String, Map<String, Object>> getLinkedFeatures() {
+        return linkedFeatures;
+    }
+
+    /**
+     * This method adds the structure to the parent stack.
+     * 
+     * @param parent
+     *            the structure to be added to the stack
+     */
+    public void pushParent(Structure parent) {
+        parentStack.push(parent);
+    }
+
+    /**
+     * This method removes the structure from the top of the parent's stack.
+     * 
+     * @return the structure that was removed from the stack
+     */
+    public Structure popParent() {
+        try {
+            return parentStack.pop();
+        } catch (EmptyStackException e) {
+            return null;
+        }
+    }
+
+    /**
+     * This method retrieves the structure at the top of the parent's stack but
+     * does not remove it.
+     * 
+     * @return the structure from the top of the stack
+     */
+    public Structure peekParent() {
+        try {
+            return parentStack.peek();
+        } catch (EmptyStackException e) {
+            return null;
+        }
+    }
+
+    /**
+     * This method adds a new modifier to the list.
+     * 
+     * @param ownerOMA
+     *            the owner's old memory address
+     * @param constraints
+     *            the object's constraints
+     */
+    public void addConstraints(Long ownerOMA, List<Constraint> constraints) {
+        List<Constraint> objectConstraints = this.constraints.get(ownerOMA);
+        if (objectConstraints == null) {
+            objectConstraints = new ArrayList<Constraint>();
+            this.constraints.put(ownerOMA, objectConstraints);
+        }
+        objectConstraints.addAll(constraints);
+    }
+
+    /**
+     * Returns constraints applied to the feature of the given OMA.
+     * @param ownerOMA
+     *            the constraints' owner OMA
+     * @return a list of constraints or <b>null</b> if no constraints are applied to the feature
+     */
+    public List<Constraint> getConstraints(Long ownerOMA) {
+        return constraints.get(ownerOMA);
+    }
+
+    /**
+     * @return all available constraints
+     */
+    public List<Constraint> getAllConstraints() {
+        List<Constraint> result = new ArrayList<Constraint>();
+        for (Entry<Long, List<Constraint>> entry : constraints.entrySet()) {
+            result.addAll(entry.getValue());
+        }
+        return result;
+    }
+
+    /**
+     * This method adds the animation for the specified OMA of its owner.
+     * 
+     * @param ownerOMA
+     *            the owner's old memory address
+     * @param animation
+     *            the animation for the feature specified by ownerOMA
+     */
+    public void addAnimation(Long ownerOMA, Animation animation) {
+        List<Animation> animList = animations.get(ownerOMA);
+        if (animList == null) {
+            animList = new ArrayList<Animation>();
+            animations.put(ownerOMA, animList);
+        }
+        animList.add(animation);
+    }
+
+    /**
+     * This method returns the animation data for the specified owner.
+     * 
+     * @param ownerOMA
+     *            the old memory address of the animation data owner
+     * @return the animation or null if none exists
+     */
+    public List<Animation> getAnimations(Long ownerOMA) {
+        return animations.get(ownerOMA);
+    }
+
+    /**
+     * This method sets the skeleton for the specified OMA of its owner.
+     * 
+     * @param skeletonOMA
+     *            the skeleton's old memory address
+     * @param skeleton
+     *            the skeleton specified by the given OMA
+     */
+    public void setSkeleton(Long skeletonOMA, Skeleton skeleton) {
+        skeletons.put(skeletonOMA, skeleton);
+    }
+
+    /**
+     * The method stores a binding between the skeleton and the proper armature
+     * node.
+     * 
+     * @param skeleton
+     *            the skeleton
+     * @param node
+     *            the armature node
+     */
+    public void setNodeForSkeleton(Skeleton skeleton, Node node) {
+        nodesWithSkeletons.put(skeleton, node);
+    }
+
+    /**
+     * This method returns the armature node that is defined for the skeleton.
+     * 
+     * @param skeleton
+     *            the skeleton
+     * @return the armature node that defines the skeleton in blender
+     */
+    public Node getControlledNode(Skeleton skeleton) {
+        return nodesWithSkeletons.get(skeleton);
+    }
+
+    /**
+     * This method returns the skeleton for the specified OMA of its owner.
+     * 
+     * @param skeletonOMA
+     *            the skeleton's old memory address
+     * @return the skeleton specified by the given OMA
+     */
+    public Skeleton getSkeleton(Long skeletonOMA) {
+        return skeletons.get(skeletonOMA);
+    }
+
+    /**
+     * This method sets the bone context for the given bone old memory address.
+     * If the context is already set it will be replaced.
+     * 
+     * @param boneOMA
+     *            the bone's old memory address
+     * @param boneContext
+     *            the bones's context
+     */
+    public void setBoneContext(Long boneOMA, BoneContext boneContext) {
+        boneContexts.put(boneOMA, boneContext);
+    }
+
+    /**
+     * This method returns the bone context for the given bone old memory
+     * address. If no context exists then <b>null</b> is returned.
+     * 
+     * @param boneOMA
+     *            the bone's old memory address
+     * @return bone's context
+     */
+    public BoneContext getBoneContext(Long boneOMA) {
+        return boneContexts.get(boneOMA);
+    }
+
+    /**
+     * Returns bone by given name.
+     * 
+     * @param skeletonOMA
+     *            the OMA of the skeleton where the bone will be searched
+     * @param name
+     *            the name of the bone
+     * @return found bone or null if none bone of a given name exists
+     */
+    public BoneContext getBoneByName(Long skeletonOMA, String name) {
+        for (Entry<Long, BoneContext> entry : boneContexts.entrySet()) {
+            if (entry.getValue().getArmatureObjectOMA().equals(skeletonOMA)) {
+                Bone bone = entry.getValue().getBone();
+                if (bone != null && name.equals(bone.getName())) {
+                    return entry.getValue();
+                }
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Returns bone context for the given bone.
+     * 
+     * @param bone
+     *            the bone
+     * @return the bone's bone context
+     */
+    public BoneContext getBoneContext(Bone bone) {
+        for (Entry<Long, BoneContext> entry : boneContexts.entrySet()) {
+            if (entry.getValue().getBone().getName().equals(bone.getName())) {
+                return entry.getValue();
+            }
+        }
+        throw new IllegalStateException("Cannot find context for bone: " + bone);
+    }
+
+    /**
+     * This metod returns the default material.
+     * 
+     * @return the default material
+     */
+    public synchronized Material getDefaultMaterial() {
+        if (blenderKey.getDefaultMaterial() == null) {
+            Material defaultMaterial = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
+            defaultMaterial.setColor("Color", ColorRGBA.DarkGray);
+            blenderKey.setDefaultMaterial(defaultMaterial);
+        }
+        return blenderKey.getDefaultMaterial();
+    }
+
+    /**
+     * Adds a custom marker for scene's feature.
+     * 
+     * @param marker
+     *            the marker name
+     * @param feature
+     *            te scene's feature (can be node, material or texture or
+     *            anything else)
+     * @param markerValue
+     *            the marker value
+     */
+    public void addMarker(String marker, Object feature, Object markerValue) {
+        if (markerValue == null) {
+            throw new IllegalArgumentException("The marker's value cannot be null.");
+        }
+        Map<Object, Object> markersMap = markers.get(marker);
+        if (markersMap == null) {
+            markersMap = new HashMap<Object, Object>();
+            markers.put(marker, markersMap);
+        }
+        markersMap.put(feature, markerValue);
+    }
+
+    /**
+     * Returns the marker value. The returned value is null if no marker was
+     * defined for the given feature.
+     * 
+     * @param marker
+     *            the marker name
+     * @param feature
+     *            the scene's feature
+     * @return marker value or null if it was not defined
+     */
+    public Object getMarkerValue(String marker, Object feature) {
+        Map<Object, Object> markersMap = markers.get(marker);
+        return markersMap == null ? null : markersMap.get(feature);
+    }
+
+    /**
+     * Adds blender action to the context.
+     * @param action
+     *            the action loaded from the blend file
+     */
+    public void addAction(BlenderAction action) {
+        actions.put(action.getName(), action);
+    }
+
+    /**
+     * @return a map of blender actions; the key is the action name and the value is action itself
+     */
+    public Map<String, BlenderAction> getActions() {
+        return actions;
+    }
+
+    /**
+     * This enum defines what loaded data type user wants to retrieve. It can be
+     * either filled structure or already converted data.
+     * 
+     * @author Marcin Roguski (Kaelthas)
+     */
+    public static enum LoadedDataType {
+        STRUCTURE, FEATURE, TEMPORAL_MESH;
+    }
+    
+    @Override
+    public String toString() {
+        return blenderKey == null ? "BlenderContext [key = null]" : "BlenderContext [ key = " + blenderKey.toString() + " ]";
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/BlenderLoader.java

@@ -0,0 +1,419 @@
+/*
+ * Copyright (c) 2009-2019 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.scene.plugins.blender;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import com.jme3.animation.Animation;
+import com.jme3.asset.AssetInfo;
+import com.jme3.asset.AssetKey;
+import com.jme3.asset.AssetLoader;
+import com.jme3.asset.AssetLocator;
+import com.jme3.asset.AssetManager;
+import com.jme3.asset.BlenderKey;
+import com.jme3.asset.ModelKey;
+import com.jme3.asset.StreamAssetInfo;
+import com.jme3.light.Light;
+import com.jme3.math.ColorRGBA;
+import com.jme3.post.Filter;
+import com.jme3.renderer.Camera;
+import com.jme3.scene.CameraNode;
+import com.jme3.scene.LightNode;
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.plugins.blender.animations.AnimationHelper;
+import com.jme3.scene.plugins.blender.cameras.CameraHelper;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper;
+import com.jme3.scene.plugins.blender.curves.CurvesHelper;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.BlenderInputStream;
+import com.jme3.scene.plugins.blender.file.FileBlockHeader;
+import com.jme3.scene.plugins.blender.file.FileBlockHeader.BlockCode;
+import com.jme3.scene.plugins.blender.file.Pointer;
+import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.blender.landscape.LandscapeHelper;
+import com.jme3.scene.plugins.blender.lights.LightHelper;
+import com.jme3.scene.plugins.blender.materials.MaterialContext;
+import com.jme3.scene.plugins.blender.materials.MaterialHelper;
+import com.jme3.scene.plugins.blender.meshes.MeshHelper;
+import com.jme3.scene.plugins.blender.meshes.TemporalMesh;
+import com.jme3.scene.plugins.blender.modifiers.ModifierHelper;
+import com.jme3.scene.plugins.blender.objects.ObjectHelper;
+import com.jme3.scene.plugins.blender.particles.ParticlesHelper;
+import com.jme3.scene.plugins.blender.textures.TextureHelper;
+import com.jme3.texture.Texture;
+
+/**
+ * This is the main loading class. Have in notice that asset manager needs to have loaders for resources like textures.
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class BlenderLoader implements AssetLoader {
+    private static final Logger     LOGGER = Logger.getLogger(BlenderLoader.class.getName());
+
+    @Override
+    public Spatial load(AssetInfo assetInfo) throws IOException {
+        try {
+            BlenderContext blenderContext = this.setup(assetInfo);
+
+            AnimationHelper animationHelper = blenderContext.getHelper(AnimationHelper.class);
+            animationHelper.loadAnimations();
+
+            BlenderKey blenderKey = blenderContext.getBlenderKey();
+            LoadedFeatures loadedFeatures = new LoadedFeatures();
+            for (FileBlockHeader block : blenderContext.getBlocks()) {
+                switch (block.getCode()) {
+                    case BLOCK_OB00:
+                        ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
+                        Node object = (Node) objectHelper.toObject(block.getStructure(blenderContext), blenderContext);
+                        if (LOGGER.isLoggable(Level.FINE)) {
+                            LOGGER.log(Level.FINE, "{0}: {1}--> {2}", new Object[] { object.getName(), object.getLocalTranslation().toString(), object.getParent() == null ? "null" : object.getParent().getName() });
+                        }
+                        if (object.getParent() == null) {
+                            loadedFeatures.objects.add(object);
+                        }
+                        if (object instanceof LightNode && ((LightNode) object).getLight() != null) {
+                            loadedFeatures.lights.add(((LightNode) object).getLight());
+                        } else if (object instanceof CameraNode && ((CameraNode) object).getCamera() != null) {
+                            loadedFeatures.cameras.add(((CameraNode) object).getCamera());
+                        }
+                        break;
+                    case BLOCK_SC00:// Scene
+                        loadedFeatures.sceneBlocks.add(block);
+                        break;
+                    case BLOCK_MA00:// Material
+                        MaterialHelper materialHelper = blenderContext.getHelper(MaterialHelper.class);
+                        MaterialContext materialContext = materialHelper.toMaterialContext(block.getStructure(blenderContext), blenderContext);
+                        loadedFeatures.materials.add(materialContext);
+                        break;
+                    case BLOCK_ME00:// Mesh
+                        MeshHelper meshHelper = blenderContext.getHelper(MeshHelper.class);
+                        TemporalMesh temporalMesh = meshHelper.toTemporalMesh(block.getStructure(blenderContext), blenderContext);
+                        loadedFeatures.meshes.add(temporalMesh);
+                        break;
+                    case BLOCK_IM00:// Image
+                        TextureHelper textureHelper = blenderContext.getHelper(TextureHelper.class);
+                        Texture image = textureHelper.loadImageAsTexture(block.getStructure(blenderContext), 0, blenderContext);
+                        if (image != null && image.getImage() != null) {// render results are stored as images but are not being loaded
+                            loadedFeatures.images.add(image);
+                        }
+                        break;
+                    case BLOCK_TE00:
+                        Structure textureStructure = block.getStructure(blenderContext);
+                        int type = ((Number) textureStructure.getFieldValue("type")).intValue();
+                        if (type == TextureHelper.TEX_IMAGE) {
+                            TextureHelper texHelper = blenderContext.getHelper(TextureHelper.class);
+                            Texture texture = texHelper.getTexture(textureStructure, null, blenderContext);
+                            if (texture != null) {// null is returned when texture has no image
+                                loadedFeatures.textures.add(texture);
+                            }
+                        } else {
+                            LOGGER.fine("Only image textures can be loaded as unlinked assets. Generated textures will be applied to an existing object.");
+                        }
+                        break;
+                    case BLOCK_WO00:// World
+                        LandscapeHelper landscapeHelper = blenderContext.getHelper(LandscapeHelper.class);
+                        Structure worldStructure = block.getStructure(blenderContext);
+
+                        String worldName = worldStructure.getName();
+                        if (blenderKey.getUsedWorld() == null || blenderKey.getUsedWorld().equals(worldName)) {
+
+                            Light ambientLight = landscapeHelper.toAmbientLight(worldStructure);
+                            if (ambientLight != null) {
+                                loadedFeatures.objects.add(new LightNode(null, ambientLight));
+                                loadedFeatures.lights.add(ambientLight);
+                            }
+                            loadedFeatures.sky = landscapeHelper.toSky(worldStructure);
+                            loadedFeatures.backgroundColor = landscapeHelper.toBackgroundColor(worldStructure);
+
+                            Filter fogFilter = landscapeHelper.toFog(worldStructure);
+                            if (fogFilter != null) {
+                                loadedFeatures.filters.add(landscapeHelper.toFog(worldStructure));
+                            }
+                        }
+                        break;
+                    case BLOCK_AC00:
+                        LOGGER.fine("Loading unlinked animations is not yet supported!");
+                        break;
+                    default:
+                        LOGGER.log(Level.FINEST, "Ommiting the block: {0}.", block.getCode());
+                }
+            }
+
+            LOGGER.fine("Baking constraints after every feature is loaded.");
+            ConstraintHelper constraintHelper = blenderContext.getHelper(ConstraintHelper.class);
+            constraintHelper.bakeConstraints(blenderContext);
+
+            LOGGER.fine("Loading scenes and attaching them to the root object.");
+            for (FileBlockHeader sceneBlock : loadedFeatures.sceneBlocks) {
+                loadedFeatures.scenes.add(this.toScene(sceneBlock.getStructure(blenderContext), blenderContext));
+            }
+
+            LOGGER.fine("Creating the root node of the model and applying loaded nodes of the scene and loaded features to it.");
+            Node modelRoot = new Node(blenderKey.getName());
+            for (Node scene : loadedFeatures.scenes) {
+                modelRoot.attachChild(scene);
+            }
+
+            if (blenderKey.isLoadUnlinkedAssets()) {
+                LOGGER.fine("Setting loaded content as user data in resulting sptaial.");
+                Map<String, Map<String, Object>> linkedData = new HashMap<String, Map<String, Object>>();
+
+                Map<String, Object> thisFileData = new HashMap<String, Object>();
+                thisFileData.put("scenes", loadedFeatures.scenes == null ? new ArrayList<Object>() : loadedFeatures.scenes);
+                thisFileData.put("objects", loadedFeatures.objects == null ? new ArrayList<Object>() : loadedFeatures.objects);
+                thisFileData.put("meshes", loadedFeatures.meshes == null ? new ArrayList<Object>() : loadedFeatures.meshes);
+                thisFileData.put("materials", loadedFeatures.materials == null ? new ArrayList<Object>() : loadedFeatures.materials);
+                thisFileData.put("textures", loadedFeatures.textures == null ? new ArrayList<Object>() : loadedFeatures.textures);
+                thisFileData.put("images", loadedFeatures.images == null ? new ArrayList<Object>() : loadedFeatures.images);
+                thisFileData.put("animations", loadedFeatures.animations == null ? new ArrayList<Object>() : loadedFeatures.animations);
+                thisFileData.put("cameras", loadedFeatures.cameras == null ? new ArrayList<Object>() : loadedFeatures.cameras);
+                thisFileData.put("lights", loadedFeatures.lights == null ? new ArrayList<Object>() : loadedFeatures.lights);
+                thisFileData.put("filters", loadedFeatures.filters == null ? new ArrayList<Object>() : loadedFeatures.filters);
+                thisFileData.put("backgroundColor", loadedFeatures.backgroundColor);
+                thisFileData.put("sky", loadedFeatures.sky);
+
+                linkedData.put("this", thisFileData);
+                linkedData.putAll(blenderContext.getLinkedFeatures());
+
+                modelRoot.setUserData("linkedData", linkedData);
+            }
+
+            return modelRoot;
+        } catch (BlenderFileException e) {
+            throw new IOException(e.getLocalizedMessage(), e);
+        } catch (Exception e) {
+            throw new IOException("Unexpected importer exception occurred: " + e.getLocalizedMessage(), e);
+        } finally {
+            this.clear(assetInfo);
+        }
+    }
+
+    /**
+     * This method converts the given structure to a scene node.
+     * @param structure
+     *            structure of a scene
+     *            @param blenderContext the blender context
+     * @return scene's node
+     * @throws BlenderFileException
+     *             an exception throw when problems with blender file occur
+     */
+    private Node toScene(Structure structure, BlenderContext blenderContext) throws BlenderFileException {
+        ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
+        Node result = new Node(structure.getName());
+        List<Structure> base = ((Structure) structure.getFieldValue("base")).evaluateListBase();
+        for (Structure b : base) {
+            Pointer pObject = (Pointer) b.getFieldValue("object");
+            if (pObject.isNotNull()) {
+                Structure objectStructure = pObject.fetchData().get(0);
+
+                Object object = objectHelper.toObject(objectStructure, blenderContext);
+                if (object instanceof Node) {
+                    if (LOGGER.isLoggable(Level.FINE)) {
+                        LOGGER.log(Level.FINE, "{0}: {1}--> {2}", new Object[] { ((Node) object).getName(), ((Node) object).getLocalTranslation().toString(), ((Node) object).getParent() == null ? "null" : ((Node) object).getParent().getName() });
+                    }
+
+                    if (((Node) object).getParent() == null) {
+                        result.attachChild((Spatial) object);
+                    }
+
+                    if(object instanceof LightNode) {
+                        result.addLight(((LightNode) object).getLight());
+                    }
+                }
+            }
+        }
+        return result;
+    }
+
+    /**
+     * This method sets up the loader.
+     * @param assetInfo
+     *            the asset info
+     * @throws BlenderFileException
+     *             an exception is throw when something wrong happens with blender file
+     */
+    protected BlenderContext setup(AssetInfo assetInfo) throws BlenderFileException {
+        // registering loaders
+        ModelKey modelKey = (ModelKey) assetInfo.getKey();
+        BlenderKey blenderKey;
+        if (modelKey instanceof BlenderKey) {
+            blenderKey = (BlenderKey) modelKey;
+        } else {
+            blenderKey = new BlenderKey(modelKey.getName());
+        }
+
+        // opening stream
+        BlenderInputStream inputStream = new BlenderInputStream(assetInfo.openStream());
+
+        // reading blocks
+        List<FileBlockHeader> blocks = new ArrayList<FileBlockHeader>();
+        FileBlockHeader fileBlock;
+        BlenderContext blenderContext = new BlenderContext();
+        blenderContext.setBlenderVersion(inputStream.getVersionNumber());
+        blenderContext.setAssetManager(assetInfo.getManager());
+        blenderContext.setInputStream(inputStream);
+        blenderContext.setBlenderKey(blenderKey);
+
+        // creating helpers
+        blenderContext.putHelper(AnimationHelper.class, new AnimationHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(TextureHelper.class, new TextureHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(MeshHelper.class, new MeshHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(ObjectHelper.class, new ObjectHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(CurvesHelper.class, new CurvesHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(LightHelper.class, new LightHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(CameraHelper.class, new CameraHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(ModifierHelper.class, new ModifierHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(MaterialHelper.class, new MaterialHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(ConstraintHelper.class, new ConstraintHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(ParticlesHelper.class, new ParticlesHelper(inputStream.getVersionNumber(), blenderContext));
+        blenderContext.putHelper(LandscapeHelper.class, new LandscapeHelper(inputStream.getVersionNumber(), blenderContext));
+
+        // reading the blocks (dna block is automatically saved in the blender context when found)
+        FileBlockHeader sceneFileBlock = null;
+        do {
+            fileBlock = new FileBlockHeader(inputStream, blenderContext);
+            if (!fileBlock.isDnaBlock()) {
+                blocks.add(fileBlock);
+                // save the scene's file block
+                if (fileBlock.getCode() == BlockCode.BLOCK_SC00) {
+                    sceneFileBlock = fileBlock;
+                }
+            }
+        } while (!fileBlock.isLastBlock());
+        if (sceneFileBlock != null) {
+            blenderContext.setSceneStructure(sceneFileBlock.getStructure(blenderContext));
+        }
+        
+        // adding locator for linked content
+        assetInfo.getManager().registerLocator(assetInfo.getKey().getName(), LinkedContentLocator.class);
+        
+        return blenderContext;
+    }
+
+    /**
+     * The internal data is only needed during loading so make it unreachable so that the GC can release
+     * that memory (which can be quite large amount).
+     */
+    protected void clear(AssetInfo assetInfo) {
+        assetInfo.getManager().unregisterLocator(assetInfo.getKey().getName(), LinkedContentLocator.class);
+    }
+
+    /**
+     * This class holds the loading results according to the given loading flag.
+     * @author Marcin Roguski (Kaelthas)
+     */
+    private static class LoadedFeatures {
+        private List<FileBlockHeader> sceneBlocks     = new ArrayList<FileBlockHeader>();
+        /** The scenes from the file. */
+        private List<Node>            scenes          = new ArrayList<Node>();
+        /** Objects from all scenes. */
+        private List<Node>            objects         = new ArrayList<Node>();
+        /** All meshes. */
+        private List<TemporalMesh>    meshes          = new ArrayList<TemporalMesh>();
+        /** Materials from all objects. */
+        private List<MaterialContext> materials       = new ArrayList<MaterialContext>();
+        /** Textures from all objects. */
+        private List<Texture>         textures        = new ArrayList<Texture>();
+        /** The images stored in the blender file. */
+        private List<Texture>         images          = new ArrayList<Texture>();
+        /** Animations of all objects. */
+        private List<Animation>       animations      = new ArrayList<Animation>();
+        /** All cameras from the file. */
+        private List<Camera>          cameras         = new ArrayList<Camera>();
+        /** All lights from the file. */
+        private List<Light>           lights          = new ArrayList<Light>();
+        /** Loaded sky. */
+        private Spatial               sky;
+        /** Scene filters (ie. FOG). */
+        private List<Filter>          filters         = new ArrayList<Filter>();
+        /**
+         * The background color of the render loaded from the horizon color of the world. If no world is used than the gray color
+         * is set to default (as in blender editor.
+         */
+        private ColorRGBA             backgroundColor = ColorRGBA.Gray;
+    }
+    
+    public static class LinkedContentLocator implements AssetLocator {
+        private File rootFolder;
+        
+        @Override
+        public void setRootPath(String rootPath) {
+            rootFolder = new File(rootPath);
+            if(rootFolder.isFile()) {
+                rootFolder = rootFolder.getParentFile();
+            }
+        }
+
+        @SuppressWarnings("rawtypes")
+        @Override
+        public AssetInfo locate(AssetManager manager, AssetKey key) {
+            if(key instanceof BlenderKey) {
+                File linkedAbsoluteFile = new File(key.getName());
+                if(linkedAbsoluteFile.exists() && linkedAbsoluteFile.isFile()) {
+                    try {
+                        return new StreamAssetInfo(manager, key, new FileInputStream(linkedAbsoluteFile));
+                    } catch (FileNotFoundException e) {
+                        return null;
+                    }
+                }
+                
+                File linkedFileInCurrentAssetFolder = new File(rootFolder, linkedAbsoluteFile.getName());
+                if(linkedFileInCurrentAssetFolder.exists() && linkedFileInCurrentAssetFolder.isFile()) {
+                    try {
+                        return new StreamAssetInfo(manager, key, new FileInputStream(linkedFileInCurrentAssetFolder));
+                    } catch (FileNotFoundException e) {
+                        return null;
+                    }
+                }
+                
+                File linkedFileInCurrentFolder = new File(".", linkedAbsoluteFile.getName());
+                if(linkedFileInCurrentFolder.exists() && linkedFileInCurrentFolder.isFile()) {
+                    try {
+                        return new StreamAssetInfo(manager, key, new FileInputStream(linkedFileInCurrentFolder));
+                    } catch (FileNotFoundException e) {
+                        return null;
+                    }
+                }
+            }
+            return null;
+        }
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/BlenderModelLoader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2019 jMonkeyEngine
+ * Copyright (c) 2009-2012 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -29,18 +29,12 @@
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
-package com.jme3.renderer.opengl;
+package com.jme3.scene.plugins.blender;
-
-import java.nio.ByteBuffer;
 
 /**
- * GL functions and constants only available on vanilla OpenGL ES 3.0.
+ * This is the main loading class. Have in notice that asset manager needs to have loaders for resources like textures.
- *
+ * @deprecated this class is deprecated; use BlenderLoader instead
- * @author Jesus Oliver
+ * @author Marcin Roguski (Kaelthas)
  */
-public interface GLES_30 extends GL {
+public class BlenderModelLoader extends BlenderLoader {
-
-    public static final int GL_RGB10_A2 = 0x8059;
-    public static final int GL_UNSIGNED_INT_2_10_10_10_REV = 0x8368;
-
 }

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/animations/AnimationHelper.java

@@ -0,0 +1,391 @@
+package com.jme3.scene.plugins.blender.animations;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import com.jme3.animation.AnimControl;
+import com.jme3.animation.Animation;
+import com.jme3.animation.BoneTrack;
+import com.jme3.animation.Skeleton;
+import com.jme3.animation.SkeletonControl;
+import com.jme3.animation.SpatialTrack;
+import com.jme3.asset.BlenderKey.AnimationMatchMethod;
+import com.jme3.scene.Node;
+import com.jme3.scene.plugins.blender.AbstractBlenderHelper;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.BlenderContext.LoadedDataType;
+import com.jme3.scene.plugins.blender.animations.Ipo.ConstIpo;
+import com.jme3.scene.plugins.blender.curves.BezierCurve;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.BlenderInputStream;
+import com.jme3.scene.plugins.blender.file.FileBlockHeader;
+import com.jme3.scene.plugins.blender.file.FileBlockHeader.BlockCode;
+import com.jme3.scene.plugins.blender.file.Pointer;
+import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.blender.objects.ObjectHelper;
+
+/**
+ * The helper class that helps in animations loading.
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class AnimationHelper extends AbstractBlenderHelper {
+    private static final Logger LOGGER = Logger.getLogger(AnimationHelper.class.getName());
+
+    public AnimationHelper(String blenderVersion, BlenderContext blenderContext) {
+        super(blenderVersion, blenderContext);
+    }
+
+    /**
+     * Loads all animations that are stored in the blender file. The animations are not yet applied to the scene features.
+     * This should be called before objects are loaded.
+     * @throws BlenderFileException
+     *             an exception is thrown when problems with blender file reading occur
+     */
+    public void loadAnimations() throws BlenderFileException {
+        LOGGER.info("Loading animations that will be later applied to scene features.");
+        List<FileBlockHeader> actionHeaders = blenderContext.getFileBlocks(BlockCode.BLOCK_AC00);
+        if (actionHeaders != null) {
+            for (FileBlockHeader header : actionHeaders) {
+                Structure actionStructure = header.getStructure(blenderContext);
+                LOGGER.log(Level.INFO, "Found animation: {0}.", actionStructure.getName());
+                blenderContext.addAction(this.getTracks(actionStructure, blenderContext));
+            }
+        }
+    }
+
+    /**
+     * The method applies animations to the given node. The names of the animations should be the same as actions names in the blender file.
+     * @param node
+     *            the node to whom the animations will be applied
+     * @param animationMatchMethod
+     *            the way animation should be matched with node
+     */
+    public void applyAnimations(Node node, AnimationMatchMethod animationMatchMethod) {
+        List<BlenderAction> actions = this.getActions(node, animationMatchMethod);
+        if (actions.size() > 0) {
+            List<Animation> animations = new ArrayList<Animation>();
+            for (BlenderAction action : actions) {
+                SpatialTrack[] tracks = action.toTracks(node, blenderContext);
+                if (tracks != null && tracks.length > 0) {
+                    Animation spatialAnimation = new Animation(action.getName(), action.getAnimationTime());
+                    spatialAnimation.setTracks(tracks);
+                    animations.add(spatialAnimation);
+                    blenderContext.addAnimation((Long) node.getUserData(ObjectHelper.OMA_MARKER), spatialAnimation);
+                }
+            }
+
+            if (animations.size() > 0) {
+                AnimControl control = new AnimControl();
+                HashMap<String, Animation> anims = new HashMap<String, Animation>(animations.size());
+                for (int i = 0; i < animations.size(); ++i) {
+                    Animation animation = animations.get(i);
+                    anims.put(animation.getName(), animation);
+                }
+                control.setAnimations(anims);
+                node.addControl(control);
+            }
+        }
+    }
+
+    /**
+     * The method applies skeleton animations to the given node.
+     * @param node
+     *            the node where the animations will be applied
+     * @param skeleton
+     *            the skeleton of the node
+     * @param animationMatchMethod
+     *            the way animation should be matched with skeleton
+     */
+    public void applyAnimations(Node node, Skeleton skeleton, AnimationMatchMethod animationMatchMethod) {
+        node.addControl(new SkeletonControl(skeleton));
+        blenderContext.setNodeForSkeleton(skeleton, node);
+        List<BlenderAction> actions = this.getActions(skeleton, animationMatchMethod);
+
+        if (actions.size() > 0) {
+            List<Animation> animations = new ArrayList<Animation>();
+            for (BlenderAction action : actions) {
+                BoneTrack[] tracks = action.toTracks(skeleton, blenderContext);
+                if (tracks != null && tracks.length > 0) {
+                    Animation boneAnimation = new Animation(action.getName(), action.getAnimationTime());
+                    boneAnimation.setTracks(tracks);
+                    animations.add(boneAnimation);
+                    Long animatedNodeOMA = ((Number) blenderContext.getMarkerValue(ObjectHelper.OMA_MARKER, node)).longValue();
+                    blenderContext.addAnimation(animatedNodeOMA, boneAnimation);
+                }
+            }
+            if (animations.size() > 0) {
+                AnimControl control = new AnimControl(skeleton);
+                HashMap<String, Animation> anims = new HashMap<String, Animation>(animations.size());
+                for (int i = 0; i < animations.size(); ++i) {
+                    Animation animation = animations.get(i);
+                    anims.put(animation.getName(), animation);
+                }
+                control.setAnimations(anims);
+                node.addControl(control);
+
+                // make sure that SkeletonControl is added AFTER the AnimControl
+                SkeletonControl skeletonControl = node.getControl(SkeletonControl.class);
+                if (skeletonControl != null) {
+                    node.removeControl(SkeletonControl.class);
+                    node.addControl(skeletonControl);
+                }
+            }
+        }
+    }
+
+    /**
+     * This method creates an ipo object used for interpolation calculations.
+     * 
+     * @param ipoStructure
+     *            the structure with ipo definition
+     * @param blenderContext
+     *            the blender context
+     * @return the ipo object
+     * @throws BlenderFileException
+     *             this exception is thrown when the blender file is somehow
+     *             corrupted
+     */
+    public Ipo fromIpoStructure(Structure ipoStructure, BlenderContext blenderContext) throws BlenderFileException {
+        Structure curvebase = (Structure) ipoStructure.getFieldValue("curve");
+
+        // preparing bezier curves
+        Ipo result = null;
+        List<Structure> curves = curvebase.evaluateListBase();// IpoCurve
+        if (curves.size() > 0) {
+            BezierCurve[] bezierCurves = new BezierCurve[curves.size()];
+            int frame = 0;
+            for (Structure curve : curves) {
+                Pointer pBezTriple = (Pointer) curve.getFieldValue("bezt");
+                List<Structure> bezTriples = pBezTriple.fetchData();
+                int type = ((Number) curve.getFieldValue("adrcode")).intValue();
+                bezierCurves[frame++] = new BezierCurve(type, bezTriples, 2);
+            }
+            curves.clear();
+            result = new Ipo(bezierCurves, fixUpAxis, blenderContext.getBlenderVersion());
+            Long ipoOma = ipoStructure.getOldMemoryAddress();
+            blenderContext.addLoadedFeatures(ipoOma, LoadedDataType.STRUCTURE, ipoStructure);
+            blenderContext.addLoadedFeatures(ipoOma, LoadedDataType.FEATURE, result);
+        }
+        return result;
+    }
+
+    /**
+     * This method creates an ipo with only a single value. No track type is
+     * specified so do not use it for calculating tracks.
+     * 
+     * @param constValue
+     *            the value of this ipo
+     * @return constant ipo
+     */
+    public Ipo fromValue(float constValue) {
+        return new ConstIpo(constValue);
+    }
+
+    /**
+     * This method retuns the bone tracks for animation.
+     * 
+     * @param actionStructure
+     *            the structure containing the tracks
+     * @param blenderContext
+     *            the blender context
+     * @return a list of tracks for the specified animation
+     * @throws BlenderFileException
+     *             an exception is thrown when there are problems with the blend
+     *             file
+     */
+    private BlenderAction getTracks(Structure actionStructure, BlenderContext blenderContext) throws BlenderFileException {
+        if (blenderVersion < 250) {
+            return this.getTracks249(actionStructure, blenderContext);
+        } else {
+            return this.getTracks250(actionStructure, blenderContext);
+        }
+    }
+
+    /**
+     * This method retuns the bone tracks for animation for blender version 2.50
+     * and higher.
+     * 
+     * @param actionStructure
+     *            the structure containing the tracks
+     * @param blenderContext
+     *            the blender context
+     * @return a list of tracks for the specified animation
+     * @throws BlenderFileException
+     *             an exception is thrown when there are problems with the blend
+     *             file
+     */
+    private BlenderAction getTracks250(Structure actionStructure, BlenderContext blenderContext) throws BlenderFileException {
+        LOGGER.log(Level.FINE, "Getting tracks!");
+        Structure groups = (Structure) actionStructure.getFieldValue("groups");
+        List<Structure> actionGroups = groups.evaluateListBase();// bActionGroup
+        BlenderAction blenderAction = new BlenderAction(actionStructure.getName(), blenderContext.getBlenderKey().getFps());
+        int lastFrame = 1;
+        for (Structure actionGroup : actionGroups) {
+            String name = actionGroup.getFieldValue("name").toString();
+            List<Structure> channels = ((Structure) actionGroup.getFieldValue("channels")).evaluateListBase();
+            BezierCurve[] bezierCurves = new BezierCurve[channels.size()];
+            int channelCounter = 0;
+            for (Structure c : channels) {
+                int type = this.getCurveType(c, blenderContext);
+                Pointer pBezTriple = (Pointer) c.getFieldValue("bezt");
+                List<Structure> bezTriples = pBezTriple.fetchData();
+                bezierCurves[channelCounter++] = new BezierCurve(type, bezTriples, 2);
+            }
+
+            Ipo ipo = new Ipo(bezierCurves, fixUpAxis, blenderContext.getBlenderVersion());
+            lastFrame = Math.max(lastFrame, ipo.getLastFrame());
+            blenderAction.featuresTracks.put(name, ipo);
+        }
+        blenderAction.stopFrame = lastFrame;
+        return blenderAction;
+    }
+
+    /**
+     * This method retuns the bone tracks for animation for blender version 2.49
+     * (and probably several lower versions too).
+     * 
+     * @param actionStructure
+     *            the structure containing the tracks
+     * @param blenderContext
+     *            the blender context
+     * @return a list of tracks for the specified animation
+     * @throws BlenderFileException
+     *             an exception is thrown when there are problems with the blend
+     *             file
+     */
+    private BlenderAction getTracks249(Structure actionStructure, BlenderContext blenderContext) throws BlenderFileException {
+        LOGGER.log(Level.FINE, "Getting tracks!");
+        Structure chanbase = (Structure) actionStructure.getFieldValue("chanbase");
+        List<Structure> actionChannels = chanbase.evaluateListBase();// bActionChannel
+        BlenderAction blenderAction = new BlenderAction(actionStructure.getName(), blenderContext.getBlenderKey().getFps());
+        int lastFrame = 1;
+        for (Structure bActionChannel : actionChannels) {
+            String animatedFeatureName = bActionChannel.getFieldValue("name").toString();
+            Pointer p = (Pointer) bActionChannel.getFieldValue("ipo");
+            if (!p.isNull()) {
+                Structure ipoStructure = p.fetchData().get(0);
+                Ipo ipo = this.fromIpoStructure(ipoStructure, blenderContext);
+                if (ipo != null) {// this can happen when ipo with no curves appear in blender file
+                    lastFrame = Math.max(lastFrame, ipo.getLastFrame());
+                    blenderAction.featuresTracks.put(animatedFeatureName, ipo);
+                }
+            }
+        }
+        blenderAction.stopFrame = lastFrame;
+        return blenderAction;
+    }
+
+    /**
+     * This method returns the type of the ipo curve.
+     * 
+     * @param structure
+     *            the structure must contain the 'rna_path' field and
+     *            'array_index' field (the type is not important here)
+     * @param blenderContext
+     *            the blender context
+     * @return the type of the curve
+     */
+    public int getCurveType(Structure structure, BlenderContext blenderContext) {
+        // reading rna path first
+        BlenderInputStream bis = blenderContext.getInputStream();
+        int currentPosition = bis.getPosition();
+        Pointer pRnaPath = (Pointer) structure.getFieldValue("rna_path");
+        FileBlockHeader dataFileBlock = blenderContext.getFileBlock(pRnaPath.getOldMemoryAddress());
+        bis.setPosition(dataFileBlock.getBlockPosition());
+        String rnaPath = bis.readString();
+        bis.setPosition(currentPosition);
+        int arrayIndex = ((Number) structure.getFieldValue("array_index")).intValue();
+
+        // determining the curve type
+        if (rnaPath.endsWith("location")) {
+            return Ipo.AC_LOC_X + arrayIndex;
+        }
+        if (rnaPath.endsWith("rotation_quaternion")) {
+            return Ipo.AC_QUAT_W + arrayIndex;
+        }
+        if (rnaPath.endsWith("scale")) {
+            return Ipo.AC_SIZE_X + arrayIndex;
+        }
+        if (rnaPath.endsWith("rotation") || rnaPath.endsWith("rotation_euler")) {
+            return Ipo.OB_ROT_X + arrayIndex;
+        }
+        LOGGER.log(Level.WARNING, "Unknown curve rna path: {0}", rnaPath);
+        return -1;
+    }
+
+    /**
+     * The method returns the actions for the given skeleton. The actions represent armature animation in blender.
+     * @param skeleton
+     *            the skeleton we fetch the actions for
+     * @param animationMatchMethod
+     *            the method of animation matching
+     * @return a list of animations for the specified skeleton
+     */
+    private List<BlenderAction> getActions(Skeleton skeleton, AnimationMatchMethod animationMatchMethod) {
+        List<BlenderAction> result = new ArrayList<BlenderAction>();
+
+        // first get a set of bone names
+        Set<String> boneNames = new HashSet<String>();
+        for (int i = 0; i < skeleton.getBoneCount(); ++i) {
+            String boneName = skeleton.getBone(i).getName();
+            if (boneName != null && boneName.length() > 0) {
+                boneNames.add(skeleton.getBone(i).getName());
+            }
+        }
+
+        // finding matches
+        Set<String> matchingNames = new HashSet<String>();
+        for (Entry<String, BlenderAction> actionEntry : blenderContext.getActions().entrySet()) {
+            // compute how many action tracks match the skeleton bones' names
+            for (String boneName : boneNames) {
+                if (actionEntry.getValue().hasTrackName(boneName)) {
+                    matchingNames.add(boneName);
+                }
+            }
+
+            BlenderAction action = null;
+            if (animationMatchMethod == AnimationMatchMethod.AT_LEAST_ONE_NAME_MATCH && matchingNames.size() > 0) {
+                action = actionEntry.getValue();
+            } else if (matchingNames.size() == actionEntry.getValue().getTracksCount()) {
+                action = actionEntry.getValue();
+            }
+
+            if (action != null) {
+                // remove the tracks that do not match the bone names if the matching method is different from ALL_NAMES_MATCH
+                if (animationMatchMethod != AnimationMatchMethod.ALL_NAMES_MATCH) {
+                    action = action.clone();
+                    action.removeTracksThatAreNotInTheCollection(matchingNames);
+                }
+                result.add(action);
+            }
+
+            matchingNames.clear();
+        }
+        return result;
+    }
+
+    /**
+     * The method returns the actions for the given node. The actions represent object animation in blender.
+     * @param node
+     *            the node we fetch the actions for
+     * @param animationMatchMethod
+     *            the method of animation matching
+     * @return a list of animations for the specified node
+     */
+    private List<BlenderAction> getActions(Node node, AnimationMatchMethod animationMatchMethod) {
+        List<BlenderAction> result = new ArrayList<BlenderAction>();
+
+        for (Entry<String, BlenderAction> actionEntry : blenderContext.getActions().entrySet()) {
+            if (actionEntry.getValue().hasTrackName(node.getName())) {
+                result.add(actionEntry.getValue());
+            }
+        }
+        return result;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/animations/BlenderAction.java

@@ -0,0 +1,134 @@
+package com.jme3.scene.plugins.blender.animations;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import com.jme3.animation.BoneTrack;
+import com.jme3.animation.Skeleton;
+import com.jme3.animation.SpatialTrack;
+import com.jme3.scene.Node;
+import com.jme3.scene.plugins.blender.BlenderContext;
+
+/**
+ * An abstract representation of animation. The data stored here is mainly a
+ * raw action data loaded from blender. It can later be transformed into
+ * bone or spatial animation and applied to the specified node.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class BlenderAction implements Cloneable {
+    /** The action name. */
+    /* package */final String     name;
+    /** Animation speed - frames per second. */
+    /* package */int              fps;
+    /**
+     * The last frame of the animation (the last ipo curve node position is
+     * used as a last frame).
+     */
+    /* package */int              stopFrame;
+    /**
+     * Tracks of the features. In case of bone animation the keys are the
+     * names of the bones. In case of spatial animation - the node's name is
+     * used. A single ipo contains all tracks for location, rotation and
+     * scales.
+     */
+    /* package */Map<String, Ipo> featuresTracks = new HashMap<String, Ipo>();
+
+    public BlenderAction(String name, int fps) {
+        this.name = name;
+        this.fps = fps;
+    }
+
+    public void removeTracksThatAreNotInTheCollection(Collection<String> trackNames) {
+        Map<String, Ipo> newTracks = new HashMap<String, Ipo>();
+        for (String trackName : trackNames) {
+            if (featuresTracks.containsKey(trackName)) {
+                newTracks.put(trackName, featuresTracks.get(trackName));
+            }
+        }
+        featuresTracks = newTracks;
+    }
+
+    @Override
+    public BlenderAction clone() {
+        BlenderAction result = new BlenderAction(name, fps);
+        result.stopFrame = stopFrame;
+        result.featuresTracks = new HashMap<String, Ipo>(featuresTracks);
+        return result;
+    }
+
+    /**
+     * Converts the action into JME spatial animation tracks.
+     * 
+     * @param node
+     *            the node that will be animated
+     * @return the spatial tracks for the node
+     */
+    public SpatialTrack[] toTracks(Node node, BlenderContext blenderContext) {
+        List<SpatialTrack> tracks = new ArrayList<SpatialTrack>(featuresTracks.size());
+        for (Entry<String, Ipo> entry : featuresTracks.entrySet()) {
+            tracks.add((SpatialTrack) entry.getValue().calculateTrack(0, null, node.getLocalTranslation(), node.getLocalRotation(), node.getLocalScale(), 1, stopFrame, fps, true));
+        }
+        return tracks.toArray(new SpatialTrack[tracks.size()]);
+    }
+
+    /**
+     * Converts the action into JME bone animation tracks.
+     * 
+     * @param skeleton
+     *            the skeleton that will be animated
+     * @return the bone tracks for the node
+     */
+    public BoneTrack[] toTracks(Skeleton skeleton, BlenderContext blenderContext) {
+        List<BoneTrack> tracks = new ArrayList<BoneTrack>(featuresTracks.size());
+        for (Entry<String, Ipo> entry : featuresTracks.entrySet()) {
+            int boneIndex = skeleton.getBoneIndex(entry.getKey());
+            BoneContext boneContext = blenderContext.getBoneContext(skeleton.getBone(boneIndex));
+            tracks.add((BoneTrack) entry.getValue().calculateTrack(boneIndex, boneContext, boneContext.getBone().getBindPosition(), boneContext.getBone().getBindRotation(), boneContext.getBone().getBindScale(), 1, stopFrame, fps, false));
+        }
+        return tracks.toArray(new BoneTrack[tracks.size()]);
+    }
+
+    /**
+     * @return the name of the action
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * @return the time of animations (in seconds)
+     */
+    public float getAnimationTime() {
+        return (stopFrame - 1) / (float) fps;
+    }
+
+    /**
+     * Determines if the current action has a track of a given name.
+     * CAUTION! The names are case sensitive.
+     * 
+     * @param name
+     *            the name of the track
+     * @return <B>true</b> if the track of a given name exists for the
+     *         action and <b>false</b> otherwise
+     */
+    public boolean hasTrackName(String name) {
+        return featuresTracks.containsKey(name);
+    }
+
+    /**
+     * @return the amount of tracks in current action
+     */
+    public int getTracksCount() {
+        return featuresTracks.size();
+    }
+
+    @Override
+    public String toString() {
+        return "BlenderTrack [name = " + name + "; tracks = [" + featuresTracks.keySet() + "]]";
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/animations/BoneContext.java

@@ -0,0 +1,400 @@
+package com.jme3.scene.plugins.blender.animations;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.jme3.animation.Bone;
+import com.jme3.animation.Skeleton;
+import com.jme3.math.Matrix4f;
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.BlenderContext.LoadedDataType;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.DynamicArray;
+import com.jme3.scene.plugins.blender.file.Pointer;
+import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.blender.objects.ObjectHelper;
+
+/**
+ * This class holds the basic data that describes a bone.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class BoneContext {
+    // the flags of the bone
+    public static final int      SELECTED                            = 0x000001;
+    public static final int      CONNECTED_TO_PARENT                 = 0x000010;
+    public static final int      DEFORM                              = 0x001000;
+    public static final int      NO_LOCAL_LOCATION                   = 0x400000;
+    public static final int      NO_INHERIT_SCALE                    = 0x008000;
+    public static final int      NO_INHERIT_ROTATION                 = 0x000200;
+    
+    /**
+     * The bones' matrices have, unlike objects', the coordinate system identical to JME's (Y axis is UP, X to the right and Z toward us).
+     * So in order to have them loaded properly we need to transform their armature matrix (which blender sees as rotated) to make sure we get identical results.
+     */
+    public static final Matrix4f BONE_ARMATURE_TRANSFORMATION_MATRIX = new Matrix4f(1, 0, 0, 0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 0, 0, 1);
+
+    private static final int     IKFLAG_LOCK_X                       = 0x01;
+    private static final int     IKFLAG_LOCK_Y                       = 0x02;
+    private static final int     IKFLAG_LOCK_Z                       = 0x04;
+    private static final int     IKFLAG_LIMIT_X                      = 0x08;
+    private static final int     IKFLAG_LIMIT_Y                      = 0x10;
+    private static final int     IKFLAG_LIMIT_Z                      = 0x20;
+
+    private BlenderContext       blenderContext;
+    /** The OMA of the bone's armature object. */
+    private Long                 armatureObjectOMA;
+    /** The OMA of the model that owns the bone's skeleton. */
+    private Long                 skeletonOwnerOma;
+    /** The structure of the bone. */
+    private Structure            boneStructure;
+    /** Bone's name. */
+    private String               boneName;
+    /** The bone's flag. */
+    private int                  flag;
+    /** The bone's matrix in world space. */
+    private Matrix4f             globalBoneMatrix;
+    /** The bone's matrix in the model space. */
+    private Matrix4f             boneMatrixInModelSpace;
+    /** The parent context. */
+    private BoneContext          parent;
+    /** The children of this context. */
+    private List<BoneContext>    children                            = new ArrayList<BoneContext>();
+    /** Created bone (available after calling 'buildBone' method). */
+    private Bone                 bone;
+    /** The length of the bone. */
+    private float                length;
+    /** The bone's deform envelope. */
+    private BoneEnvelope         boneEnvelope;
+
+    // The below data is used only for IK constraint computations.
+
+    /** The bone's stretch value. */
+    private float                ikStretch;
+    /** Bone's rotation minimum values. */
+    private Vector3f             limitMin;
+    /** Bone's rotation maximum values. */
+    private Vector3f             limitMax;
+    /** The bone's stiffness values (how much it rotates during IK computations. */
+    private Vector3f             stiffness;
+    /** Values that indicate if any axis' rotation should be limited by some angle. */
+    private boolean[]            limits;
+    /** Values that indicate if any axis' rotation should be disabled during IK computations. */
+    private boolean[]            locks;
+
+    /**
+     * Constructor. Creates the basic set of bone's data.
+     * 
+     * @param armatureObjectOMA
+     *            the OMA of the bone's armature object
+     * @param boneStructure
+     *            the bone's structure
+     * @param blenderContext
+     *            the blender context
+     * @throws BlenderFileException
+     *             an exception is thrown when problem with blender data reading
+     *             occurs
+     */
+    public BoneContext(Long armatureObjectOMA, Structure boneStructure, BlenderContext blenderContext) throws BlenderFileException {
+        this(boneStructure, armatureObjectOMA, null, blenderContext);
+    }
+
+    /**
+     * Constructor. Creates the basic set of bone's data.
+     * 
+     * @param boneStructure
+     *            the bone's structure
+     * @param armatureObjectOMA
+     *            the OMA of the bone's armature object
+     * @param parent
+     *            bone's parent (null if the bone is the root bone)
+     * @param blenderContext
+     *            the blender context
+     * @throws BlenderFileException
+     *             an exception is thrown when problem with blender data reading
+     *             occurs
+     */
+    @SuppressWarnings("unchecked")
+    private BoneContext(Structure boneStructure, Long armatureObjectOMA, BoneContext parent, BlenderContext blenderContext) throws BlenderFileException {
+        this.parent = parent;
+        this.blenderContext = blenderContext;
+        this.boneStructure = boneStructure;
+        this.armatureObjectOMA = armatureObjectOMA;
+        boneName = boneStructure.getFieldValue("name").toString();
+        flag = ((Number) boneStructure.getFieldValue("flag")).intValue();
+        length = ((Number) boneStructure.getFieldValue("length")).floatValue();
+        ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
+
+        // first get the bone matrix in its armature space
+        globalBoneMatrix = objectHelper.getMatrix(boneStructure, "arm_mat", blenderContext.getBlenderKey().isFixUpAxis());
+        if (blenderContext.getBlenderKey().isFixUpAxis()) {
+            // then make sure it is rotated in a proper way to fit the jme bone transformation conventions
+            globalBoneMatrix.multLocal(BONE_ARMATURE_TRANSFORMATION_MATRIX);
+        }
+
+        Structure armatureStructure = blenderContext.getFileBlock(armatureObjectOMA).getStructure(blenderContext);
+        Spatial armature = (Spatial) objectHelper.toObject(armatureStructure, blenderContext);
+        ConstraintHelper constraintHelper = blenderContext.getHelper(ConstraintHelper.class);
+        Matrix4f armatureWorldMatrix = constraintHelper.toMatrix(armature.getWorldTransform(), new Matrix4f());
+
+        // and now compute the final bone matrix in world space
+        globalBoneMatrix = armatureWorldMatrix.mult(globalBoneMatrix);
+
+        // load the bone deformation envelope if necessary
+        if ((flag & DEFORM) == 0) {// if the flag is NOT set then the DEFORM is in use
+            boneEnvelope = new BoneEnvelope(boneStructure, armatureWorldMatrix, blenderContext.getBlenderKey().isFixUpAxis());
+        }
+
+        // load bone's pose channel data
+        Pointer pPose = (Pointer) armatureStructure.getFieldValue("pose");
+        if (pPose != null && pPose.isNotNull()) {
+            List<Structure> poseChannels = ((Structure) pPose.fetchData().get(0).getFieldValue("chanbase")).evaluateListBase();
+            for (Structure poseChannel : poseChannels) {
+                Long boneOMA = ((Pointer) poseChannel.getFieldValue("bone")).getOldMemoryAddress();
+                if (boneOMA.equals(this.boneStructure.getOldMemoryAddress())) {
+                    ikStretch = ((Number) poseChannel.getFieldValue("ikstretch")).floatValue();
+                    DynamicArray<Number> limitMin = (DynamicArray<Number>) poseChannel.getFieldValue("limitmin");
+                    this.limitMin = new Vector3f(limitMin.get(0).floatValue(), limitMin.get(1).floatValue(), limitMin.get(2).floatValue());
+
+                    DynamicArray<Number> limitMax = (DynamicArray<Number>) poseChannel.getFieldValue("limitmax");
+                    this.limitMax = new Vector3f(limitMax.get(0).floatValue(), limitMax.get(1).floatValue(), limitMax.get(2).floatValue());
+
+                    DynamicArray<Number> stiffness = (DynamicArray<Number>) poseChannel.getFieldValue("stiffness");
+                    this.stiffness = new Vector3f(stiffness.get(0).floatValue(), stiffness.get(1).floatValue(), stiffness.get(2).floatValue());
+
+                    int ikFlag = ((Number) poseChannel.getFieldValue("ikflag")).intValue();
+                    locks = new boolean[] { (ikFlag & IKFLAG_LOCK_X) != 0, (ikFlag & IKFLAG_LOCK_Y) != 0, (ikFlag & IKFLAG_LOCK_Z) != 0 };
+                    // limits are enabled when locks are disabled, so we ween to take that into account here
+                    limits = new boolean[] { (ikFlag & IKFLAG_LIMIT_X & ~IKFLAG_LOCK_X) != 0, (ikFlag & IKFLAG_LIMIT_Y & ~IKFLAG_LOCK_Y) != 0, (ikFlag & IKFLAG_LIMIT_Z & ~IKFLAG_LOCK_Z) != 0 };
+                    break;// we have found what we need, no need to search further
+                }
+            }
+        }
+
+        // create the children
+        List<Structure> childbase = ((Structure) boneStructure.getFieldValue("childbase")).evaluateListBase();
+        for (Structure child : childbase) {
+            children.add(new BoneContext(child, armatureObjectOMA, this, blenderContext));
+        }
+
+        blenderContext.setBoneContext(boneStructure.getOldMemoryAddress(), this);
+    }
+
+    /**
+     * This method builds the bone. It recursively builds the bone's children.
+     * 
+     * @param bones
+     *            a list of bones where the newly created bone will be added
+     * @param skeletonOwnerOma
+     *            the spatial of the object that will own the skeleton
+     * @param blenderContext
+     *            the blender context
+     * @return newly created bone
+     */
+    public Bone buildBone(List<Bone> bones, Long skeletonOwnerOma, BlenderContext blenderContext) {
+        this.skeletonOwnerOma = skeletonOwnerOma;
+        Long boneOMA = boneStructure.getOldMemoryAddress();
+        bone = new Bone(boneName);
+        bones.add(bone);
+        blenderContext.addLoadedFeatures(boneOMA, LoadedDataType.STRUCTURE, boneStructure);
+        blenderContext.addLoadedFeatures(boneOMA, LoadedDataType.FEATURE, bone);
+        ObjectHelper objectHelper = blenderContext.getHelper(ObjectHelper.class);
+
+        Structure skeletonOwnerObjectStructure = (Structure) blenderContext.getLoadedFeature(skeletonOwnerOma, LoadedDataType.STRUCTURE);
+        // I could load 'imat' here, but apparently in some older blenders there were bugs or unfinished functionalities that stored ZERO matrix in imat field
+        // loading 'obmat' and inverting it makes us avoid errors in such cases
+        Matrix4f invertedObjectOwnerGlobalMatrix = objectHelper.getMatrix(skeletonOwnerObjectStructure, "obmat", blenderContext.getBlenderKey().isFixUpAxis()).invertLocal();
+        if (objectHelper.isParent(skeletonOwnerOma, armatureObjectOMA)) {
+            boneMatrixInModelSpace = globalBoneMatrix.mult(invertedObjectOwnerGlobalMatrix);
+        } else {
+            boneMatrixInModelSpace = invertedObjectOwnerGlobalMatrix.mult(globalBoneMatrix);
+        }
+
+        Matrix4f boneLocalMatrix = parent == null ? boneMatrixInModelSpace : parent.boneMatrixInModelSpace.invert().multLocal(boneMatrixInModelSpace);
+
+        Vector3f poseLocation = parent == null || !this.is(CONNECTED_TO_PARENT) ? boneLocalMatrix.toTranslationVector() : new Vector3f(0, parent.length, 0);
+        Quaternion rotation = boneLocalMatrix.toRotationQuat().normalizeLocal();
+        Vector3f scale = boneLocalMatrix.toScaleVector();
+
+        bone.setBindTransforms(poseLocation, rotation, scale);
+        for (BoneContext child : children) {
+            bone.addChild(child.buildBone(bones, skeletonOwnerOma, blenderContext));
+        }
+
+        return bone;
+    }
+
+    /**
+     * @return built bone (available after calling 'buildBone' method)
+     */
+    public Bone getBone() {
+        return bone;
+    }
+
+    /**
+     * @return the old memory address of the bone
+     */
+    public Long getBoneOma() {
+        return boneStructure.getOldMemoryAddress();
+    }
+
+    /**
+     * The method returns the length of the bone.
+     * If you want to use it for bone debugger take model space scale into account and do
+     * something like this:
+     * <b>boneContext.getLength() * boneContext.getBone().getModelSpaceScale().y</b>.
+     * Otherwise the bones might not look as they should in the bone debugger.
+     * @return the length of the bone
+     */
+    public float getLength() {
+        return length;
+    }
+
+    /**
+     * @return OMA of the bone's armature object
+     */
+    public Long getArmatureObjectOMA() {
+        return armatureObjectOMA;
+    }
+
+    /**
+     * @return the OMA of the model that owns the bone's skeleton
+     */
+    public Long getSkeletonOwnerOma() {
+        return skeletonOwnerOma;
+    }
+
+    /**
+     * @return the skeleton the bone of this context belongs to
+     */
+    public Skeleton getSkeleton() {
+        return blenderContext.getSkeleton(armatureObjectOMA);
+    }
+
+    /**
+     * @return the initial bone's matrix in model space
+     */
+    public Matrix4f getBoneMatrixInModelSpace() {
+        return boneMatrixInModelSpace;
+    }
+
+    /**
+     * @return the vertex assigning envelope of the bone
+     */
+    public BoneEnvelope getBoneEnvelope() {
+        return boneEnvelope;
+    }
+
+    /**
+     * @return bone's stretch factor
+     */
+    public float getIkStretch() {
+        return ikStretch;
+    }
+
+    /**
+     * @return indicates if the X rotation should be limited
+     */
+    public boolean isLimitX() {
+        return limits != null ? limits[0] : false;
+    }
+
+    /**
+     * @return indicates if the Y rotation should be limited
+     */
+    public boolean isLimitY() {
+        return limits != null ? limits[1] : false;
+    }
+
+    /**
+     * @return indicates if the Z rotation should be limited
+     */
+    public boolean isLimitZ() {
+        return limits != null ? limits[2] : false;
+    }
+
+    /**
+     * @return indicates if the X rotation should be disabled
+     */
+    public boolean isLockX() {
+        return locks != null ? locks[0] : false;
+    }
+
+    /**
+     * @return indicates if the Y rotation should be disabled
+     */
+    public boolean isLockY() {
+        return locks != null ? locks[1] : false;
+    }
+
+    /**
+     * @return indicates if the Z rotation should be disabled
+     */
+    public boolean isLockZ() {
+        return locks != null ? locks[2] : false;
+    }
+
+    /**
+     * @return the minimum values in rotation limitation (if limitation is enabled for specific axis).
+     */
+    public Vector3f getLimitMin() {
+        return limitMin;
+    }
+
+    /**
+     * @return the maximum values in rotation limitation (if limitation is enabled for specific axis).
+     */
+    public Vector3f getLimitMax() {
+        return limitMax;
+    }
+
+    /**
+     * @return the stiffness of the bone
+     */
+    public Vector3f getStiffness() {
+        return stiffness;
+    }
+
+    /**
+     * Tells if the bone is of specified property defined by its flag.
+     * @param flagMask
+     *            the mask of the flag (constants defined in this class)
+     * @return <b>true</b> if the bone IS of specified proeprty and <b>false</b> otherwise
+     */
+    public boolean is(int flagMask) {
+        return (flag & flagMask) != 0;
+    }
+
+    /**
+     * @return the root bone context of this bone context
+     */
+    public BoneContext getRoot() {
+        BoneContext result = this;
+        while (result.parent != null) {
+            result = result.parent;
+        }
+        return result;
+    }
+
+    /**
+     * @return a number of bones from this bone to its root
+     */
+    public int getDistanceFromRoot() {
+        int result = 0;
+        BoneContext boneContext = this;
+        while (boneContext.parent != null) {
+            boneContext = boneContext.parent;
+            ++result;
+        }
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "BoneContext: " + boneName;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/animations/BoneEnvelope.java

@@ -0,0 +1,133 @@
+package com.jme3.scene.plugins.blender.animations;
+
+import com.jme3.math.Matrix4f;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.plugins.blender.file.DynamicArray;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * An implementation of bone envelope. Used when assigning bones to the mesh by envelopes.
+ * 
+ * @author Marcin Roguski
+ */
+public class BoneEnvelope {
+    /** A defined distance that will be included in the envelope space. */
+    private float    distance;
+    /** The bone's weight. */
+    private float    weight;
+    /** The radius of the bone's head. */
+    private float    boneHeadRadius;
+    /** The radius of the bone's tail. */
+    private float    boneTailRadius;
+    /** Head position in rest pose in world space. */
+    private Vector3f head;
+    /** Tail position in rest pose in world space. */
+    private Vector3f tail;
+
+    /**
+     * The constructor of bone envelope. It reads all the needed data. Take notice that the positions of head and tail
+     * are computed in the world space and that the points' positions given for computations should be in world space as well.
+     * 
+     * @param boneStructure
+     *            the blender bone structure
+     * @param armatureWorldMatrix
+     *            the world matrix of the armature object
+     * @param fixUpAxis
+     *            a variable that tells if we use the Y-is up axis orientation
+     */
+    @SuppressWarnings("unchecked")
+    public BoneEnvelope(Structure boneStructure, Matrix4f armatureWorldMatrix, boolean fixUpAxis) {
+        distance = ((Number) boneStructure.getFieldValue("dist")).floatValue();
+        weight = ((Number) boneStructure.getFieldValue("weight")).floatValue();
+        boneHeadRadius = ((Number) boneStructure.getFieldValue("rad_head")).floatValue();
+        boneTailRadius = ((Number) boneStructure.getFieldValue("rad_tail")).floatValue();
+
+        DynamicArray<Number> headArray = (DynamicArray<Number>) boneStructure.getFieldValue("arm_head");
+        head = new Vector3f(headArray.get(0).floatValue(), headArray.get(1).floatValue(), headArray.get(2).floatValue());
+        if (fixUpAxis) {
+            float z = head.z;
+            head.z = -head.y;
+            head.y = z;
+        }
+        armatureWorldMatrix.mult(head, head);// move the head point to global space
+
+        DynamicArray<Number> tailArray = (DynamicArray<Number>) boneStructure.getFieldValue("arm_tail");
+        tail = new Vector3f(tailArray.get(0).floatValue(), tailArray.get(1).floatValue(), tailArray.get(2).floatValue());
+        if (fixUpAxis) {
+            float z = tail.z;
+            tail.z = -tail.y;
+            tail.y = z;
+        }
+        armatureWorldMatrix.mult(tail, tail);// move the tail point to global space
+    }
+
+    /**
+     * The method verifies if the given point is inside the envelope.
+     * @param point
+     *            the point in 3D space (MUST be in a world coordinate space)
+     * @return <b>true</b> if the point is inside the envelope and <b>false</b> otherwise
+     */
+    public boolean isInEnvelope(Vector3f point) {
+        Vector3f v = tail.subtract(head);
+        float boneLength = v.length();
+        v.normalizeLocal();
+
+        // computing a plane that contains 'point' and v is its normal vector
+        // the plane's equation is: Ax + By + Cz + D = 0, where v = [A, B, C]
+        float D = -v.dot(point);
+
+        // computing a point where a line that contains head and tail crosses the plane
+        float temp = -(v.dot(head) + D) / v.dot(v);
+        Vector3f p = head.add(v.x * temp, v.y * temp, v.z * temp);
+
+        // determining if the point p is on the same or other side of head than the tail point
+        Vector3f headToPointOnLineVector = p.subtract(head);
+        float headToPointLength = headToPointOnLineVector.length();
+        float cosinus = headToPointOnLineVector.dot(v) / headToPointLength;// the length of v is already = 1; cosinus should be either 1, 0 or -1
+        if (cosinus < 0 && headToPointLength > boneHeadRadius || headToPointLength > boneLength + boneTailRadius) {
+            return false;// the point is outside the anvelope
+        }
+
+        // now check if the point is inside and envelope
+        float pointDistanceFromLine = point.subtract(p).length(), maximumDistance = 0;
+        if (cosinus < 0) {
+            // checking if the distance from p to point is inside the half sphere defined by head envelope
+            // compute the distance from the line to the half sphere border
+            maximumDistance = boneHeadRadius;
+        } else if (headToPointLength < boneLength) {
+            // compute the maximum available distance
+            if (boneTailRadius > boneHeadRadius) {
+                // compute the distance from head to p
+                float headToPDistance = p.subtract(head).length();
+                // from tangens function we have
+                float x = headToPDistance * ((boneTailRadius - boneHeadRadius) / boneLength);
+                maximumDistance = x + boneHeadRadius;
+            } else if (boneTailRadius < boneHeadRadius) {
+                // compute the distance from head to p
+                float tailToPDistance = p.subtract(tail).length();
+                // from tangens function we have
+                float x = tailToPDistance * ((boneHeadRadius - boneTailRadius) / boneLength);
+                maximumDistance = x + boneTailRadius;
+            } else {
+                maximumDistance = boneTailRadius;
+            }
+        } else {
+            // checking if the distance from p to point is inside the half sphere defined by tail envelope
+            maximumDistance = boneTailRadius;
+        }
+
+        return pointDistanceFromLine <= maximumDistance + distance;
+    }
+
+    /**
+     * @return the weight of the bone
+     */
+    public float getWeight() {
+        return weight;
+    }
+
+    @Override
+    public String toString() {
+        return "BoneEnvelope [d=" + distance + ", w=" + weight + ", hr=" + boneHeadRadius + ", tr=" + boneTailRadius + ", (" + head + ") -> (" + tail + ")]";
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/animations/Ipo.java

@@ -0,0 +1,317 @@
+package com.jme3.scene.plugins.blender.animations;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import com.jme3.animation.BoneTrack;
+import com.jme3.animation.SpatialTrack;
+import com.jme3.animation.Track;
+import com.jme3.math.FastMath;
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.plugins.blender.curves.BezierCurve;
+
+/**
+ * This class is used to calculate bezier curves value for the given frames. The
+ * Ipo (interpolation object) consists of several b-spline curves (connected 3rd
+ * degree bezier curves) of a different type.
+ * 
+ * @author Marcin Roguski
+ */
+public class Ipo {
+    private static final Logger LOGGER    = Logger.getLogger(Ipo.class.getName());
+
+    public static final int     AC_LOC_X  = 1;
+    public static final int     AC_LOC_Y  = 2;
+    public static final int     AC_LOC_Z  = 3;
+    public static final int     OB_ROT_X  = 7;
+    public static final int     OB_ROT_Y  = 8;
+    public static final int     OB_ROT_Z  = 9;
+    public static final int     AC_SIZE_X = 13;
+    public static final int     AC_SIZE_Y = 14;
+    public static final int     AC_SIZE_Z = 15;
+    public static final int     AC_QUAT_W = 25;
+    public static final int     AC_QUAT_X = 26;
+    public static final int     AC_QUAT_Y = 27;
+    public static final int     AC_QUAT_Z = 28;
+
+    /** A list of bezier curves for this interpolation object. */
+    private BezierCurve[]       bezierCurves;
+    /** Each ipo contains one bone track. */
+    private Track               calculatedTrack;
+    /** This variable indicates if the Y asxis is the UP axis or not. */
+    protected boolean           fixUpAxis;
+    /**
+     * Depending on the blender version rotations are stored in degrees or
+     * radians so we need to know the version that is used.
+     */
+    protected final int         blenderVersion;
+
+    /**
+     * Constructor. Stores the bezier curves.
+     * 
+     * @param bezierCurves
+     *            a table of bezier curves
+     * @param fixUpAxis
+     *            indicates if the Y is the up axis or not
+     * @param blenderVersion
+     *            the blender version that is currently used
+     */
+    public Ipo(BezierCurve[] bezierCurves, boolean fixUpAxis, int blenderVersion) {
+        this.bezierCurves = bezierCurves;
+        this.fixUpAxis = fixUpAxis;
+        this.blenderVersion = blenderVersion;
+    }
+
+    /**
+     * This method calculates the ipo value for the first curve.
+     * 
+     * @param frame
+     *            the frame for which the value is calculated
+     * @return calculated ipo value
+     */
+    public double calculateValue(int frame) {
+        return this.calculateValue(frame, 0);
+    }
+
+    /**
+     * This method calculates the ipo value for the curve of the specified
+     * index. Make sure you do not exceed the curves amount. Alway chech the
+     * amount of curves before calling this method.
+     * 
+     * @param frame
+     *            the frame for which the value is calculated
+     * @param curveIndex
+     *            the index of the curve
+     * @return calculated ipo value
+     */
+    public double calculateValue(int frame, int curveIndex) {
+        return bezierCurves[curveIndex].evaluate(frame, BezierCurve.Y_VALUE);
+    }
+
+    /**
+     * This method returns the frame where last bezier triple center point of
+     * the specified bezier curve is located.
+     * 
+     * @return the frame number of the last defined bezier triple point for the
+     *         specified ipo
+     */
+    public int getLastFrame() {
+        int result = 1;
+        for (int i = 0; i < bezierCurves.length; ++i) {
+            int tempResult = bezierCurves[i].getLastFrame();
+            if (tempResult > result) {
+                result = tempResult;
+            }
+        }
+        return result;
+    }
+
+    /**
+     * This method calculates the value of the curves as a bone track between
+     * the specified frames.
+     * 
+     * @param targetIndex
+     *            the index of the target for which the method calculates the
+     *            tracks IMPORTANT! Aet to -1 (or any negative number) if you
+     *            want to load spatial animation.
+     * @param localTranslation
+     *            the local translation of the object/bone that will be animated by
+     *            the track
+     * @param localRotation
+     *            the local rotation of the object/bone that will be animated by
+     *            the track
+     * @param localScale
+     *            the local scale of the object/bone that will be animated by
+     *            the track
+     * @param startFrame
+     *            the first frame of tracks (inclusive)
+     * @param stopFrame
+     *            the last frame of the tracks (inclusive)
+     * @param fps
+     *            frame rate (frames per second)
+     * @param spatialTrack
+     *            this flag indicates if the track belongs to a spatial or to a
+     *            bone; the difference is important because it appears that bones
+     *            in blender have the same type of coordinate system (Y as UP)
+     *            as jme while other features have different one (Z is UP)
+     * @return bone track for the specified bone
+     */
+    public Track calculateTrack(int targetIndex, BoneContext boneContext, Vector3f localTranslation, Quaternion localRotation, Vector3f localScale, int startFrame, int stopFrame, int fps, boolean spatialTrack) {
+        if (calculatedTrack == null) {
+            // preparing data for track
+            int framesAmount = stopFrame - startFrame;
+            float timeBetweenFrames = 1.0f / fps;
+
+            float[] times = new float[framesAmount + 1];
+            Vector3f[] translations = new Vector3f[framesAmount + 1];
+            float[] translation = new float[3];
+            Quaternion[] rotations = new Quaternion[framesAmount + 1];
+            float[] quaternionRotation = new float[] { localRotation.getX(), localRotation.getY(), localRotation.getZ(), localRotation.getW(), };
+            float[] eulerRotation = localRotation.toAngles(null);
+            Vector3f[] scales = new Vector3f[framesAmount + 1];
+            float[] scale = new float[] { localScale.x, localScale.y, localScale.z };
+            float degreeToRadiansFactor = 1;
+            if (blenderVersion < 250) {// in blender earlier than 2.50 the values are stored in degrees
+                degreeToRadiansFactor *= FastMath.DEG_TO_RAD * 10;// the values in blender are divided by 10, so we need to mult it here
+            }
+            int yIndex = 1, zIndex = 2;
+            boolean swapAxes = spatialTrack && fixUpAxis;
+            if (swapAxes) {
+                yIndex = 2;
+                zIndex = 1;
+            }
+            boolean eulerRotationUsed = false, queternionRotationUsed = false;
+
+            // calculating track data
+            for (int frame = startFrame; frame <= stopFrame; ++frame) {
+                boolean translationSet = false;
+                translation[0] = translation[1] = translation[2] = 0;
+                int index = frame - startFrame;
+                times[index] = index * timeBetweenFrames;// start + (frame - 1) * timeBetweenFrames;
+                for (int j = 0; j < bezierCurves.length; ++j) {
+                    double value = bezierCurves[j].evaluate(frame, BezierCurve.Y_VALUE);
+                    switch (bezierCurves[j].getType()) {
+                        // LOCATION
+                        case AC_LOC_X:
+                            translation[0] = (float) value;
+                            translationSet = true;
+                            break;
+                        case AC_LOC_Y:
+                            if (swapAxes && value != 0) {
+                                value = -value;
+                            }
+                            translation[yIndex] = (float) value;
+                            translationSet = true;
+                            break;
+                        case AC_LOC_Z:
+                            translation[zIndex] = (float) value;
+                            translationSet = true;
+                            break;
+
+                        // EULER ROTATION
+                        case OB_ROT_X:
+                            eulerRotationUsed = true;
+                            eulerRotation[0] = (float) value * degreeToRadiansFactor;
+                            break;
+                        case OB_ROT_Y:
+                            eulerRotationUsed = true;
+                            if (swapAxes && value != 0) {
+                                value = -value;
+                            }
+                            eulerRotation[yIndex] = (float) value * degreeToRadiansFactor;
+                            break;
+                        case OB_ROT_Z:
+                            eulerRotationUsed = true;
+                            eulerRotation[zIndex] = (float) value * degreeToRadiansFactor;
+                            break;
+
+                        // SIZE
+                        case AC_SIZE_X:
+                            scale[0] = (float) value;
+                            break;
+                        case AC_SIZE_Y:
+                            scale[yIndex] = (float) value;
+                            break;
+                        case AC_SIZE_Z:
+                            scale[zIndex] = (float) value;
+                            break;
+
+                        // QUATERNION ROTATION (used with bone animation)
+                        case AC_QUAT_W:
+                            queternionRotationUsed = true;
+                            quaternionRotation[3] = (float) value;
+                            break;
+                        case AC_QUAT_X:
+                            queternionRotationUsed = true;
+                            quaternionRotation[0] = (float) value;
+                            break;
+                        case AC_QUAT_Y:
+                            queternionRotationUsed = true;
+                            if (swapAxes && value != 0) {
+                                value = -value;
+                            }
+                            quaternionRotation[yIndex] = (float) value;
+                            break;
+                        case AC_QUAT_Z:
+                            quaternionRotation[zIndex] = (float) value;
+                            break;
+                        default:
+                            LOGGER.log(Level.WARNING, "Unknown ipo curve type: {0}.", bezierCurves[j].getType());
+                    }
+                }
+                if(translationSet) {
+                    translations[index] = localRotation.multLocal(new Vector3f(translation[0], translation[1], translation[2]));
+                } else {
+                    translations[index] = new Vector3f();
+                }
+                
+                if(boneContext != null) {
+                    if(boneContext.getBone().getParent() == null && boneContext.is(BoneContext.NO_LOCAL_LOCATION)) {
+                        float temp = translations[index].z;
+                        translations[index].z = -translations[index].y;
+                        translations[index].y = temp;
+                    }
+                }
+                
+                if (queternionRotationUsed) {
+                    rotations[index] = new Quaternion(quaternionRotation[0], quaternionRotation[1], quaternionRotation[2], quaternionRotation[3]);
+                } else {
+                    rotations[index] = new Quaternion().fromAngles(eulerRotation);
+                }
+
+                scales[index] = new Vector3f(scale[0], scale[1], scale[2]);
+            }
+            if (spatialTrack) {
+                calculatedTrack = new SpatialTrack(times, translations, rotations, scales);
+            } else {
+                calculatedTrack = new BoneTrack(targetIndex, times, translations, rotations, scales);
+            }
+
+            if (queternionRotationUsed && eulerRotationUsed) {
+                LOGGER.warning("Animation uses both euler and quaternion tracks for rotations. Quaternion rotation is applied. Make sure that this is what you wanted!");
+            }
+        }
+
+        return calculatedTrack;
+    }
+
+    /**
+     * Ipo constant curve. This is a curve with only one value and no specified
+     * type. This type of ipo cannot be used to calculate tracks. It should only
+     * be used to calculate single value for a given frame.
+     * 
+     * @author Marcin Roguski (Kaelthas)
+     */
+    /* package */static class ConstIpo extends Ipo {
+
+        /** The constant value of this ipo. */
+        private float constValue;
+
+        /**
+         * Constructor. Stores the constant value of this ipo.
+         * 
+         * @param constValue
+         *            the constant value of this ipo
+         */
+        public ConstIpo(float constValue) {
+            super(null, false, 0);// the version is not important here
+            this.constValue = constValue;
+        }
+
+        @Override
+        public double calculateValue(int frame) {
+            return constValue;
+        }
+
+        @Override
+        public double calculateValue(int frame, int curveIndex) {
+            return constValue;
+        }
+
+        @Override
+        public BoneTrack calculateTrack(int boneIndex, BoneContext boneContext, Vector3f localTranslation, Quaternion localRotation, Vector3f localScale, int startFrame, int stopFrame, int fps, boolean boneTrack) {
+            throw new IllegalStateException("Constatnt ipo object cannot be used for calculating bone tracks!");
+        }
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/cameras/CameraHelper.java

@@ -0,0 +1,148 @@
+package com.jme3.scene.plugins.blender.cameras;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import com.jme3.math.FastMath;
+import com.jme3.renderer.Camera;
+import com.jme3.scene.plugins.blender.AbstractBlenderHelper;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * A class that is used to load cameras into the scene.
+ * @author Marcin Roguski
+ */
+public class CameraHelper extends AbstractBlenderHelper {
+
+    private static final Logger LOGGER             = Logger.getLogger(CameraHelper.class.getName());
+    protected static final int  DEFAULT_CAM_WIDTH  = 640;
+    protected static final int  DEFAULT_CAM_HEIGHT = 480;
+
+    /**
+     * This constructor parses the given blender version and stores the result. Some functionalities may differ in
+     * different blender versions.
+     * @param blenderVersion
+     *            the version read from the blend file
+     * @param blenderContext
+     *            the blender context
+     */
+    public CameraHelper(String blenderVersion, BlenderContext blenderContext) {
+        super(blenderVersion, blenderContext);
+    }
+
+    /**
+     * This method converts the given structure to jme camera.
+     * 
+     * @param structure
+     *            camera structure
+     * @return jme camera object
+     * @throws BlenderFileException
+     *             an exception is thrown when there are problems with the
+     *             blender file
+     */
+    public Camera toCamera(Structure structure, BlenderContext blenderContext) throws BlenderFileException {
+        if (blenderVersion >= 250) {
+            return this.toCamera250(structure, blenderContext.getSceneStructure());
+        } else {
+            return this.toCamera249(structure);
+        }
+    }
+
+    /**
+     * This method converts the given structure to jme camera. Should be used form blender 2.5+.
+     * 
+     * @param structure
+     *            camera structure
+     * @param sceneStructure
+     *            scene structure
+     * @return jme camera object
+     * @throws BlenderFileException
+     *             an exception is thrown when there are problems with the
+     *             blender file
+     */
+    private Camera toCamera250(Structure structure, Structure sceneStructure) throws BlenderFileException {
+        int width = DEFAULT_CAM_WIDTH;
+        int height = DEFAULT_CAM_HEIGHT;
+        if (sceneStructure != null) {
+            Structure renderData = (Structure) sceneStructure.getFieldValue("r");
+            width = ((Number) renderData.getFieldValue("xsch")).shortValue();
+            height = ((Number) renderData.getFieldValue("ysch")).shortValue();
+        }
+        Camera camera = new Camera(width, height);
+        int type = ((Number) structure.getFieldValue("type")).intValue();
+        if (type != 0 && type != 1) {
+            LOGGER.log(Level.WARNING, "Unknown camera type: {0}. Perspective camera is being used!", type);
+            type = 0;
+        }
+        // type==0 - perspective; type==1 - orthographic; perspective is used as default
+        camera.setParallelProjection(type == 1);
+        float aspect = width / (float) height;
+        float fovY; // Vertical field of view in degrees
+        float clipsta = ((Number) structure.getFieldValue("clipsta")).floatValue();
+        float clipend = ((Number) structure.getFieldValue("clipend")).floatValue();
+        if (type == 0) {
+            // Convert lens MM to vertical degrees in fovY, see Blender rna_Camera_angle_get()
+            // Default sensor size prior to 2.60 was 32.
+            float sensor = 32.0f;
+            boolean sensorVertical = false;
+            Number sensorFit = (Number) structure.getFieldValue("sensor_fit");
+            if (sensorFit != null) {
+                // If sensor_fit is vert (2), then sensor_y is used
+                sensorVertical = sensorFit.byteValue() == 2;
+                String sensorName = "sensor_x";
+                if (sensorVertical) {
+                    sensorName = "sensor_y";
+                }
+                sensor = ((Number) structure.getFieldValue(sensorName)).floatValue();
+            }
+            float focalLength = ((Number) structure.getFieldValue("lens")).floatValue();
+            float fov = 2.0f * FastMath.atan(sensor / 2.0f / focalLength);
+            if (sensorVertical) {
+                fovY = fov * FastMath.RAD_TO_DEG;
+            } else {
+                // Convert fov from horizontal to vertical
+                fovY = 2.0f * FastMath.atan(FastMath.tan(fov / 2.0f) / aspect) * FastMath.RAD_TO_DEG;
+            }
+        } else {
+            // This probably is not correct.
+            fovY = ((Number) structure.getFieldValue("ortho_scale")).floatValue();
+        }
+        camera.setFrustumPerspective(fovY, aspect, clipsta, clipend);
+        camera.setName(structure.getName());
+        return camera;
+    }
+
+    /**
+     * This method converts the given structure to jme camera. Should be used form blender 2.49.
+     * 
+     * @param structure
+     *            camera structure
+     * @return jme camera object
+     * @throws BlenderFileException
+     *             an exception is thrown when there are problems with the
+     *             blender file
+     */
+    private Camera toCamera249(Structure structure) throws BlenderFileException {
+        Camera camera = new Camera(DEFAULT_CAM_WIDTH, DEFAULT_CAM_HEIGHT);
+        int type = ((Number) structure.getFieldValue("type")).intValue();
+        if (type != 0 && type != 1) {
+            LOGGER.log(Level.WARNING, "Unknown camera type: {0}. Perspective camera is being used!", type);
+            type = 0;
+        }
+        // type==0 - perspective; type==1 - orthographic; perspective is used as default
+        camera.setParallelProjection(type == 1);
+        float aspect = 0;
+        float clipsta = ((Number) structure.getFieldValue("clipsta")).floatValue();
+        float clipend = ((Number) structure.getFieldValue("clipend")).floatValue();
+        if (type == 0) {
+            aspect = ((Number) structure.getFieldValue("lens")).floatValue();
+        } else {
+            aspect = ((Number) structure.getFieldValue("ortho_scale")).floatValue();
+        }
+        camera.setFrustumPerspective(aspect, camera.getWidth() / camera.getHeight(), clipsta, clipend);
+        camera.setName(structure.getName());
+        return camera;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/BoneConstraint.java

@@ -0,0 +1,88 @@
+package com.jme3.scene.plugins.blender.constraints;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import com.jme3.scene.Spatial;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.BlenderContext.LoadedDataType;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
+import com.jme3.scene.plugins.blender.animations.Ipo;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.blender.objects.ObjectHelper;
+
+/**
+ * Constraint applied on the bone.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class BoneConstraint extends Constraint {
+    private static final Logger LOGGER = Logger.getLogger(BoneConstraint.class.getName());
+
+    /**
+     * The bone constraint constructor.
+     * 
+     * @param constraintStructure
+     *            the constraint's structure
+     * @param ownerOMA
+     *            the OMA of the bone that owns the constraint
+     * @param influenceIpo
+     *            the influence interpolation curve
+     * @param blenderContext
+     *            the blender context
+     * @throws BlenderFileException
+     *             exception thrown when problems with blender file occur
+     */
+    public BoneConstraint(Structure constraintStructure, Long ownerOMA, Ipo influenceIpo, BlenderContext blenderContext) throws BlenderFileException {
+        super(constraintStructure, ownerOMA, influenceIpo, blenderContext);
+    }
+
+    @Override
+    public boolean validate() {
+        if (targetOMA != null) {
+            Spatial nodeTarget = (Spatial) blenderContext.getLoadedFeature(targetOMA, LoadedDataType.FEATURE);
+            if (nodeTarget == null) {
+                LOGGER.log(Level.WARNING, "Cannot find target for constraint: {0}.", name);
+                return false;
+            }
+            // the second part of the if expression verifies if the found node
+            // (if any) is an armature node
+            if (blenderContext.getMarkerValue(ObjectHelper.ARMATURE_NODE_MARKER, nodeTarget) != null) {
+                if (subtargetName.trim().isEmpty()) {
+                    LOGGER.log(Level.WARNING, "No bone target specified for constraint: {0}.", name);
+                    return false;
+                }
+                // if the target is not an object node then it is an Armature,
+                // so make sure the bone is in the current skeleton
+                BoneContext boneContext = blenderContext.getBoneContext(ownerOMA);
+                if (targetOMA.longValue() != boneContext.getArmatureObjectOMA().longValue()) {
+                    LOGGER.log(Level.WARNING, "Bone constraint {0} must target bone in the its own skeleton! Targeting bone in another skeleton is not supported!", name);
+                    return false;
+                }
+            }
+        }
+        return constraintDefinition == null ? true : constraintDefinition.isTargetRequired();
+    }
+
+    @Override
+    public void apply(int frame) {
+        super.apply(frame);
+        blenderContext.getBoneContext(ownerOMA).getBone().updateModelTransforms();
+    }
+    
+    @Override
+    public Long getTargetOMA() {
+        if(targetOMA != null && subtargetName != null && !subtargetName.trim().isEmpty()) {
+            Spatial nodeTarget = (Spatial) blenderContext.getLoadedFeature(targetOMA, LoadedDataType.FEATURE);
+            if(nodeTarget != null) {
+                if(blenderContext.getMarkerValue(ObjectHelper.ARMATURE_NODE_MARKER, nodeTarget) != null) {
+                    BoneContext boneContext = blenderContext.getBoneByName(targetOMA, subtargetName);
+                    return boneContext != null ? boneContext.getBoneOma() : 0L;
+                }
+                return targetOMA;
+            }
+        }
+        return 0L;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/Constraint.java

@@ -0,0 +1,186 @@
+package com.jme3.scene.plugins.blender.constraints;
+
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import com.jme3.math.Transform;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.animations.Ipo;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.constraints.definitions.ConstraintDefinition;
+import com.jme3.scene.plugins.blender.constraints.definitions.ConstraintDefinitionFactory;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.Pointer;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * The implementation of a constraint.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+public abstract class Constraint {
+    private static final Logger          LOGGER = Logger.getLogger(Constraint.class.getName());
+
+    /** The name of this constraint. */
+    protected final String               name;
+    /** Indicates if the constraint is already baked or not. */
+    protected boolean                    baked;
+
+    protected Space                      ownerSpace;
+    protected final ConstraintDefinition constraintDefinition;
+    protected Long                       ownerOMA;
+
+    protected Long                       targetOMA;
+    protected Space                      targetSpace;
+    protected String                     subtargetName;
+
+    /** The ipo object defining influence. */
+    protected final Ipo                  ipo;
+    /** The blender context. */
+    protected final BlenderContext       blenderContext;
+    protected final ConstraintHelper     constraintHelper;
+
+    /**
+     * This constructor creates the constraint instance.
+     * 
+     * @param constraintStructure
+     *            the constraint's structure (bConstraint clss in blender 2.49).
+     * @param ownerOMA
+     *            the old memory address of the constraint owner
+     * @param influenceIpo
+     *            the ipo curve of the influence factor
+     * @param blenderContext
+     *            the blender context
+     * @throws BlenderFileException
+     *             this exception is thrown when the blender file is somehow
+     *             corrupted
+     */
+    public Constraint(Structure constraintStructure, Long ownerOMA, Ipo influenceIpo, BlenderContext blenderContext) throws BlenderFileException {
+        this.blenderContext = blenderContext;
+        name = constraintStructure.getFieldValue("name").toString();
+        Pointer pData = (Pointer) constraintStructure.getFieldValue("data");
+        if (pData.isNotNull()) {
+            Structure data = pData.fetchData().get(0);
+            constraintDefinition = ConstraintDefinitionFactory.createConstraintDefinition(data, name, ownerOMA, blenderContext);
+            Pointer pTar = (Pointer) data.getFieldValue("tar");
+            if (pTar != null && pTar.isNotNull()) {
+                targetOMA = pTar.getOldMemoryAddress();
+                targetSpace = Space.valueOf(((Number) constraintStructure.getFieldValue("tarspace")).byteValue());
+                Object subtargetValue = data.getFieldValue("subtarget");
+                if (subtargetValue != null) {// not all constraint data have the
+                                             // subtarget field
+                    subtargetName = subtargetValue.toString();
+                }
+            }
+        } else {
+            // Null constraint has no data, so create it here
+            constraintDefinition = ConstraintDefinitionFactory.createConstraintDefinition(null, name, null, blenderContext);
+        }
+        ownerSpace = Space.valueOf(((Number) constraintStructure.getFieldValue("ownspace")).byteValue());
+        ipo = influenceIpo;
+        this.ownerOMA = ownerOMA;
+        constraintHelper = blenderContext.getHelper(ConstraintHelper.class);
+        LOGGER.log(Level.INFO, "Created constraint: {0} with definition: {1}", new Object[] { name, constraintDefinition });
+    }
+
+    /**
+     * @return <b>true</b> if the constraint is implemented and <b>false</b>
+     *         otherwise
+     */
+    public boolean isImplemented() {
+        return constraintDefinition == null ? true : constraintDefinition.isImplemented();
+    }
+
+    /**
+     * @return the name of the constraint type, similar to the constraint name
+     *         used in Blender
+     */
+    public String getConstraintTypeName() {
+        return constraintDefinition.getConstraintTypeName();
+    }
+
+    /**
+     * @return the OMAs of the features whose transform had been altered beside the constraint owner
+     */
+    public Set<Long> getAlteredOmas() {
+        return constraintDefinition.getAlteredOmas();
+    }
+
+    /**
+     * Performs validation before baking. Checks factors that can prevent
+     * constraint from baking that could not be checked during constraint
+     * loading.
+     */
+    public abstract boolean validate();
+
+    /**
+     * @return the OMA of the target or 0 if no target is specified for the constraint
+     */
+    public abstract Long getTargetOMA();
+
+    /**
+     * Applies the constraint to owner (and in some cases can alter other bones of the skeleton).
+     * @param frame
+     *            the frame of the animation
+     */
+    public void apply(int frame) {
+        if (LOGGER.isLoggable(Level.FINEST)) {
+            LOGGER.log(Level.FINEST, "Applying constraint: {0} for frame {1}", new Object[] { name, frame });
+        }
+        Transform targetTransform = targetOMA != null ? constraintHelper.getTransform(targetOMA, subtargetName, targetSpace) : null;
+        constraintDefinition.bake(ownerSpace, targetSpace, targetTransform, (float) ipo.calculateValue(frame));
+    }
+
+    /**
+     * @return determines if the definition of the constraint will change the bone in any way; in most cases
+     *         it is possible to tell that even before the constraint baking simulation is started, so we can discard such bones from constraint
+     *         computing to improve the computation speed and lower the computations complexity
+     */
+    public boolean isTrackToBeChanged() {
+        return constraintDefinition == null ? false : constraintDefinition.isTrackToBeChanged();
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + (name == null ? 0 : name.hashCode());
+        result = prime * result + (ownerOMA == null ? 0 : ownerOMA.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (this.getClass() != obj.getClass()) {
+            return false;
+        }
+        Constraint other = (Constraint) obj;
+        if (name == null) {
+            if (other.name != null) {
+                return false;
+            }
+        } else if (!name.equals(other.name)) {
+            return false;
+        }
+        if (ownerOMA == null) {
+            if (other.ownerOMA != null) {
+                return false;
+            }
+        } else if (!ownerOMA.equals(other.ownerOMA)) {
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return "Constraint(name = " + name + ", def = " + constraintDefinition + ")";
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/ConstraintHelper.java

@@ -0,0 +1,476 @@
+package com.jme3.scene.plugins.blender.constraints;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.logging.Logger;
+
+import com.jme3.animation.Bone;
+import com.jme3.animation.Skeleton;
+import com.jme3.math.Matrix4f;
+import com.jme3.math.Quaternion;
+import com.jme3.math.Transform;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.plugins.blender.AbstractBlenderHelper;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.BlenderContext.LoadedDataType;
+import com.jme3.scene.plugins.blender.animations.AnimationHelper;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
+import com.jme3.scene.plugins.blender.animations.Ipo;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.Pointer;
+import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.blender.objects.ObjectHelper;
+import com.jme3.util.TempVars;
+
+/**
+ * This class should be used for constraint calculations.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class ConstraintHelper extends AbstractBlenderHelper {
+    private static final Logger     LOGGER                      = Logger.getLogger(ConstraintHelper.class.getName());
+
+    /**
+     * Helper constructor.
+     * 
+     * @param blenderVersion
+     *            the version read from the blend file
+     * @param blenderContext
+     *            the blender context
+     */
+    public ConstraintHelper(String blenderVersion, BlenderContext blenderContext) {
+        super(blenderVersion, blenderContext);
+    }
+
+    /**
+     * This method reads constraints for for the given structure. The
+     * constraints are loaded only once for object/bone.
+     * 
+     * @param objectStructure
+     *            the structure we read constraint's for
+     * @param blenderContext
+     *            the blender context
+     * @throws BlenderFileException
+     */
+    public void loadConstraints(Structure objectStructure, BlenderContext blenderContext) throws BlenderFileException {
+        LOGGER.fine("Loading constraints.");
+        // reading influence ipos for the constraints
+        AnimationHelper animationHelper = blenderContext.getHelper(AnimationHelper.class);
+        Map<String, Map<String, Ipo>> constraintsIpos = new HashMap<String, Map<String, Ipo>>();
+        Pointer pActions = (Pointer) objectStructure.getFieldValue("action");
+        if (pActions.isNotNull()) {
+            List<Structure> actions = pActions.fetchData();
+            for (Structure action : actions) {
+                Structure chanbase = (Structure) action.getFieldValue("chanbase");
+                List<Structure> actionChannels = chanbase.evaluateListBase();
+                for (Structure actionChannel : actionChannels) {
+                    Map<String, Ipo> ipos = new HashMap<String, Ipo>();
+                    Structure constChannels = (Structure) actionChannel.getFieldValue("constraintChannels");
+                    List<Structure> constraintChannels = constChannels.evaluateListBase();
+                    for (Structure constraintChannel : constraintChannels) {
+                        Pointer pIpo = (Pointer) constraintChannel.getFieldValue("ipo");
+                        if (pIpo.isNotNull()) {
+                            String constraintName = constraintChannel.getFieldValue("name").toString();
+                            Ipo ipo = animationHelper.fromIpoStructure(pIpo.fetchData().get(0), blenderContext);
+                            ipos.put(constraintName, ipo);
+                        }
+                    }
+                    String actionName = actionChannel.getFieldValue("name").toString();
+                    constraintsIpos.put(actionName, ipos);
+                }
+            }
+        }
+
+        // loading constraints connected with the object's bones
+        Pointer pPose = (Pointer) objectStructure.getFieldValue("pose");
+        if (pPose.isNotNull()) {
+            List<Structure> poseChannels = ((Structure) pPose.fetchData().get(0).getFieldValue("chanbase")).evaluateListBase();
+            for (Structure poseChannel : poseChannels) {
+                List<Constraint> constraintsList = new ArrayList<Constraint>();
+                Long boneOMA = Long.valueOf(((Pointer) poseChannel.getFieldValue("bone")).getOldMemoryAddress());
+
+                // the name is read directly from structure because bone might
+                // not yet be loaded
+                String name = blenderContext.getFileBlock(boneOMA).getStructure(blenderContext).getFieldValue("name").toString();
+                List<Structure> constraints = ((Structure) poseChannel.getFieldValue("constraints")).evaluateListBase();
+                for (Structure constraint : constraints) {
+                    String constraintName = constraint.getFieldValue("name").toString();
+                    Map<String, Ipo> ipoMap = constraintsIpos.get(name);
+                    Ipo ipo = ipoMap == null ? null : ipoMap.get(constraintName);
+                    if (ipo == null) {
+                        float enforce = ((Number) constraint.getFieldValue("enforce")).floatValue();
+                        ipo = animationHelper.fromValue(enforce);
+                    }
+                    constraintsList.add(new BoneConstraint(constraint, boneOMA, ipo, blenderContext));
+                }
+                blenderContext.addConstraints(boneOMA, constraintsList);
+            }
+        }
+
+        // loading constraints connected with the object itself
+        List<Structure> constraints = ((Structure) objectStructure.getFieldValue("constraints")).evaluateListBase();
+        if (constraints != null && constraints.size() > 0) {
+            Pointer pData = (Pointer) objectStructure.getFieldValue("data");
+            String dataType = pData.isNotNull() ? pData.fetchData().get(0).getType() : null;
+            List<Constraint> constraintsList = new ArrayList<Constraint>(constraints.size());
+
+            for (Structure constraint : constraints) {
+                String constraintName = constraint.getFieldValue("name").toString();
+                String objectName = objectStructure.getName();
+
+                Map<String, Ipo> objectConstraintsIpos = constraintsIpos.get(objectName);
+                Ipo ipo = objectConstraintsIpos != null ? objectConstraintsIpos.get(constraintName) : null;
+                if (ipo == null) {
+                    float enforce = ((Number) constraint.getFieldValue("enforce")).floatValue();
+                    ipo = animationHelper.fromValue(enforce);
+                }
+
+                constraintsList.add(this.createConstraint(dataType, constraint, objectStructure.getOldMemoryAddress(), ipo, blenderContext));
+            }
+            blenderContext.addConstraints(objectStructure.getOldMemoryAddress(), constraintsList);
+        }
+    }
+
+    /**
+     * This method creates a proper constraint object depending on the object's
+     * data type. Supported data types: <li>Mesh <li>Armature <li>Camera <li>
+     * Lamp Bone constraints are created in a different place.
+     * 
+     * @param dataType
+     *            the type of the object's data
+     * @param constraintStructure
+     *            the constraint structure
+     * @param ownerOMA
+     *            the owner OMA
+     * @param influenceIpo
+     *            the influence interpolation curve
+     * @param blenderContext
+     *            the blender context
+     * @return constraint object for the required type
+     * @throws BlenderFileException
+     *             thrown when problems with blender file occurred
+     */
+    private Constraint createConstraint(String dataType, Structure constraintStructure, Long ownerOMA, Ipo influenceIpo, BlenderContext blenderContext) throws BlenderFileException {
+        if (dataType == null || "Mesh".equalsIgnoreCase(dataType) || "Camera".equalsIgnoreCase(dataType) || "Lamp".equalsIgnoreCase(dataType)) {
+            return new SpatialConstraint(constraintStructure, ownerOMA, influenceIpo, blenderContext);
+        } else if ("Armature".equalsIgnoreCase(dataType)) {
+            return new SkeletonConstraint(constraintStructure, ownerOMA, influenceIpo, blenderContext);
+        } else {
+            throw new IllegalArgumentException("Unsupported data type for applying constraints: " + dataType);
+        }
+    }
+
+    /**
+     * The method bakes all available and valid constraints.
+     * 
+     * @param blenderContext
+     *            the blender context
+     */
+    public void bakeConstraints(BlenderContext blenderContext) {
+        Set<Long> owners = new HashSet<Long>();
+        for (Constraint constraint : blenderContext.getAllConstraints()) {
+            if(constraint instanceof BoneConstraint) {
+                BoneContext boneContext = blenderContext.getBoneContext(constraint.ownerOMA);
+                owners.add(boneContext.getArmatureObjectOMA());
+            } else {
+                Spatial spatial = (Spatial) blenderContext.getLoadedFeature(constraint.ownerOMA, LoadedDataType.FEATURE);
+                while (spatial.getParent() != null) {
+                    spatial = spatial.getParent();
+                }
+                owners.add((Long)blenderContext.getMarkerValue(ObjectHelper.OMA_MARKER, spatial));
+            }
+        }
+        
+        List<SimulationNode> simulationRootNodes = new ArrayList<SimulationNode>(owners.size());
+        for(Long ownerOMA : owners) {
+            simulationRootNodes.add(new SimulationNode(ownerOMA, blenderContext));
+        }
+
+        for (SimulationNode node : simulationRootNodes) {
+            node.simulate();
+        }
+    }
+
+    /**
+     * The method retrieves the transform from a feature in a given space.
+     * 
+     * @param oma
+     *            the OMA of the feature (spatial or armature node)
+     * @param subtargetName
+     *            the feature's subtarget (bone in a case of armature's node)
+     * @param space
+     *            the space the transform is evaluated to
+     * @return the transform of a feature in a given space
+     */
+    public Transform getTransform(Long oma, String subtargetName, Space space) {
+        Spatial feature = (Spatial) blenderContext.getLoadedFeature(oma, LoadedDataType.FEATURE);
+        boolean isArmature = blenderContext.getMarkerValue(ObjectHelper.ARMATURE_NODE_MARKER, feature) != null;
+        if (isArmature) {
+            blenderContext.getSkeleton(oma).updateWorldVectors();
+            BoneContext targetBoneContext = blenderContext.getBoneByName(oma, subtargetName);
+            Bone bone = targetBoneContext.getBone();
+
+            if (bone.getParent() == null && (space == Space.CONSTRAINT_SPACE_LOCAL || space == Space.CONSTRAINT_SPACE_PARLOCAL)) {
+                space = Space.CONSTRAINT_SPACE_POSE;
+            }
+
+            TempVars tempVars = TempVars.get();// use readable names of the matrices so that the code is more clear
+            Transform result;
+            switch (space) {
+                case CONSTRAINT_SPACE_WORLD:
+                    Spatial model = (Spatial) blenderContext.getLoadedFeature(targetBoneContext.getSkeletonOwnerOma(), LoadedDataType.FEATURE);
+                    Matrix4f boneModelMatrix = this.toMatrix(bone.getModelSpacePosition(), bone.getModelSpaceRotation(), bone.getModelSpaceScale(), tempVars.tempMat4);
+                    Matrix4f modelWorldMatrix = this.toMatrix(model.getWorldTransform(), tempVars.tempMat42);
+                    Matrix4f boneMatrixInWorldSpace = modelWorldMatrix.multLocal(boneModelMatrix);
+                    result = new Transform(boneMatrixInWorldSpace.toTranslationVector(), boneMatrixInWorldSpace.toRotationQuat(), boneMatrixInWorldSpace.toScaleVector());
+                    break;
+                case CONSTRAINT_SPACE_LOCAL:
+                    assert bone.getParent() != null : "CONSTRAINT_SPACE_LOCAL should be evaluated as CONSTRAINT_SPACE_POSE if the bone has no parent!";
+                    result = new Transform(bone.getLocalPosition(), bone.getLocalRotation(), bone.getLocalScale());
+                    break;
+                case CONSTRAINT_SPACE_POSE: {
+                    Matrix4f boneWorldMatrix = this.toMatrix(this.getTransform(oma, subtargetName, Space.CONSTRAINT_SPACE_WORLD), tempVars.tempMat4);
+                    Matrix4f armatureInvertedWorldMatrix = this.toMatrix(feature.getWorldTransform(), tempVars.tempMat42).invertLocal();
+                    Matrix4f bonePoseMatrix = armatureInvertedWorldMatrix.multLocal(boneWorldMatrix);
+                    result = new Transform(bonePoseMatrix.toTranslationVector(), bonePoseMatrix.toRotationQuat(), bonePoseMatrix.toScaleVector());
+                    break;
+                }
+                case CONSTRAINT_SPACE_PARLOCAL: {
+                    Matrix4f boneWorldMatrix = this.toMatrix(this.getTransform(oma, subtargetName, Space.CONSTRAINT_SPACE_WORLD), tempVars.tempMat4);
+                    Matrix4f armatureInvertedWorldMatrix = this.toMatrix(feature.getWorldTransform(), tempVars.tempMat42).invertLocal();
+                    Matrix4f bonePoseMatrix = armatureInvertedWorldMatrix.multLocal(boneWorldMatrix);
+                    result = new Transform(bonePoseMatrix.toTranslationVector(), bonePoseMatrix.toRotationQuat(), bonePoseMatrix.toScaleVector());
+                    Bone parent = bone.getParent();
+                    if(parent != null) {
+                        BoneContext parentContext = blenderContext.getBoneContext(parent);
+                        Vector3f head = parent.getModelSpacePosition();
+                        Vector3f tail = head.add(bone.getModelSpaceRotation().mult(Vector3f.UNIT_Y.mult(parentContext.getLength())));
+                        result.getTranslation().subtractLocal(tail);
+                        
+                    }
+                    break;
+                }
+                default:
+                    throw new IllegalStateException("Unknown space type: " + space);
+            }
+            tempVars.release();
+            return result;
+        } else {
+            switch (space) {
+                case CONSTRAINT_SPACE_LOCAL:
+                    return feature.getLocalTransform();
+                case CONSTRAINT_SPACE_WORLD:
+                    return feature.getWorldTransform();
+                case CONSTRAINT_SPACE_PARLOCAL:
+                case CONSTRAINT_SPACE_POSE:
+                    throw new IllegalStateException("Nodes can have only Local and World spaces applied!");
+                default:
+                    throw new IllegalStateException("Unknown space type: " + space);
+            }
+        }
+    }
+
+    /**
+     * Applies transform to a feature (bone or spatial). Computations transform
+     * the given transformation from the given space to the feature's local
+     * space.
+     * 
+     * @param oma
+     *            the OMA of the feature we apply transformation to
+     * @param subtargetName
+     *            the name of the feature's subtarget (bone in case of armature)
+     * @param space
+     *            the space in which the given transform is to be applied
+     * @param transform
+     *            the transform we apply
+     */
+    public void applyTransform(Long oma, String subtargetName, Space space, Transform transform) {
+        Spatial feature = (Spatial) blenderContext.getLoadedFeature(oma, LoadedDataType.FEATURE);
+        boolean isArmature = blenderContext.getMarkerValue(ObjectHelper.ARMATURE_NODE_MARKER, feature) != null;
+        if (isArmature) {
+            Skeleton skeleton = blenderContext.getSkeleton(oma);
+            BoneContext targetBoneContext = blenderContext.getBoneByName(oma, subtargetName);
+            Bone bone = targetBoneContext.getBone();
+
+            if (bone.getParent() == null && (space == Space.CONSTRAINT_SPACE_LOCAL || space == Space.CONSTRAINT_SPACE_PARLOCAL)) {
+                space = Space.CONSTRAINT_SPACE_POSE;
+            }
+
+            TempVars tempVars = TempVars.get();
+            switch (space) {
+                case CONSTRAINT_SPACE_LOCAL:
+                    assert bone.getParent() != null : "CONSTRAINT_SPACE_LOCAL should be evaluated as CONSTRAINT_SPACE_POSE if the bone has no parent!";
+                    bone.setBindTransforms(transform.getTranslation(), transform.getRotation(), transform.getScale());
+                    break;
+                case CONSTRAINT_SPACE_WORLD: {
+                    Matrix4f boneMatrixInWorldSpace = this.toMatrix(transform, tempVars.tempMat4);
+                    Matrix4f modelWorldMatrix = this.toMatrix(this.getTransform(targetBoneContext.getSkeletonOwnerOma(), null, Space.CONSTRAINT_SPACE_WORLD), tempVars.tempMat42);
+                    Matrix4f boneMatrixInModelSpace = modelWorldMatrix.invertLocal().multLocal(boneMatrixInWorldSpace);
+                    Bone parent = bone.getParent();
+                    if (parent != null) {
+                        Matrix4f parentMatrixInModelSpace = this.toMatrix(parent.getModelSpacePosition(), parent.getModelSpaceRotation(), parent.getModelSpaceScale(), tempVars.tempMat4);
+                        boneMatrixInModelSpace = parentMatrixInModelSpace.invertLocal().multLocal(boneMatrixInModelSpace);
+                    }
+                    bone.setBindTransforms(boneMatrixInModelSpace.toTranslationVector(), boneMatrixInModelSpace.toRotationQuat(), boneMatrixInModelSpace.toScaleVector());
+                    break;
+                }
+                case CONSTRAINT_SPACE_POSE: {
+                    Matrix4f armatureWorldMatrix = this.toMatrix(feature.getWorldTransform(), tempVars.tempMat4);
+                    Matrix4f boneMatrixInWorldSpace = armatureWorldMatrix.multLocal(this.toMatrix(transform, tempVars.tempMat42));
+                    Matrix4f invertedModelMatrix = this.toMatrix(this.getTransform(targetBoneContext.getSkeletonOwnerOma(), null, Space.CONSTRAINT_SPACE_WORLD), tempVars.tempMat42).invertLocal();
+                    Matrix4f boneMatrixInModelSpace = invertedModelMatrix.multLocal(boneMatrixInWorldSpace);
+                    Bone parent = bone.getParent();
+                    if (parent != null) {
+                        Matrix4f parentMatrixInModelSpace = this.toMatrix(parent.getModelSpacePosition(), parent.getModelSpaceRotation(), parent.getModelSpaceScale(), tempVars.tempMat4);
+                        boneMatrixInModelSpace = parentMatrixInModelSpace.invertLocal().multLocal(boneMatrixInModelSpace);
+                    }
+                    bone.setBindTransforms(boneMatrixInModelSpace.toTranslationVector(), boneMatrixInModelSpace.toRotationQuat(), boneMatrixInModelSpace.toScaleVector());
+                    break;
+                }
+                case CONSTRAINT_SPACE_PARLOCAL:
+                    Matrix4f armatureWorldMatrix = this.toMatrix(feature.getWorldTransform(), tempVars.tempMat4);
+                    Matrix4f boneMatrixInWorldSpace = armatureWorldMatrix.multLocal(this.toMatrix(transform, tempVars.tempMat42));
+                    Matrix4f invertedModelMatrix = this.toMatrix(this.getTransform(targetBoneContext.getSkeletonOwnerOma(), null, Space.CONSTRAINT_SPACE_WORLD), tempVars.tempMat42).invertLocal();
+                    Matrix4f boneMatrixInModelSpace = invertedModelMatrix.multLocal(boneMatrixInWorldSpace);
+                    Bone parent = bone.getParent();
+                    if (parent != null) {
+                        //first add the initial parent matrix to the bone's model matrix
+                        BoneContext parentContext = blenderContext.getBoneContext(parent);
+
+                        Matrix4f initialParentMatrixInModelSpace = parentContext.getBoneMatrixInModelSpace();
+                        Matrix4f currentParentMatrixInModelSpace = this.toMatrix(parent.getModelSpacePosition(), parent.getModelSpaceRotation(), parent.getModelSpaceScale(), tempVars.tempMat4);
+                        //the bone will now move with its parent in model space
+
+                        //now we need to subtract the difference between current parent's model matrix and its initial model matrix
+                        boneMatrixInModelSpace = initialParentMatrixInModelSpace.mult(boneMatrixInModelSpace);
+
+                        Matrix4f diffMatrix = initialParentMatrixInModelSpace.mult(currentParentMatrixInModelSpace.invert());
+                        boneMatrixInModelSpace.multLocal(diffMatrix);
+                        //now the bone will have its position in model space with initial parent's model matrix added
+                    }
+                    bone.setBindTransforms(boneMatrixInModelSpace.toTranslationVector(), boneMatrixInModelSpace.toRotationQuat(), boneMatrixInModelSpace.toScaleVector());
+                    break;
+                default:
+                    tempVars.release();
+                    throw new IllegalStateException("Invalid space type for target object: " + space.toString());
+            }
+            tempVars.release();
+            skeleton.updateWorldVectors();
+        } else {
+            switch (space) {
+                case CONSTRAINT_SPACE_LOCAL:
+                    feature.getLocalTransform().set(transform);
+                    break;
+                case CONSTRAINT_SPACE_WORLD:
+                    if (feature.getParent() == null) {
+                        feature.setLocalTransform(transform);
+                    } else {
+                        Transform parentWorldTransform = feature.getParent().getWorldTransform();
+
+                        TempVars tempVars = TempVars.get();
+                        Matrix4f parentInverseMatrix = this.toMatrix(parentWorldTransform, tempVars.tempMat4).invertLocal();
+                        Matrix4f m = this.toMatrix(transform, tempVars.tempMat42);
+                        m = m.multLocal(parentInverseMatrix);
+                        tempVars.release();
+
+                        transform.setTranslation(m.toTranslationVector());
+                        transform.setRotation(m.toRotationQuat());
+                        transform.setScale(m.toScaleVector());
+
+                        feature.setLocalTransform(transform);
+                    }
+                    break;
+                default:
+                    throw new IllegalStateException("Invalid space type for spatial object: " + space.toString());
+            }
+        }
+    }
+
+    /**
+     * Converts given transform to the matrix.
+     * 
+     * @param transform
+     *            the transform to be converted
+     * @param store
+     *            the matrix where the result will be stored
+     * @return the store matrix
+     */
+    public Matrix4f toMatrix(Transform transform, Matrix4f store) {
+        if (transform != null) {
+            return this.toMatrix(transform.getTranslation(), transform.getRotation(), transform.getScale(), store);
+        }
+        store.loadIdentity();
+        return store;
+    }
+
+    /**
+     * Converts given transformation parameters into the matrix.
+     * 
+     * @param position
+     *            the position of the feature
+     * @param rotation
+     *            the rotation of the feature
+     * @param scale
+     *            the scale of the feature
+     * @param store
+     *            the matrix where the result will be stored
+     * @return the store matrix
+     */
+    private Matrix4f toMatrix(Vector3f position, Quaternion rotation, Vector3f scale, Matrix4f store) {
+        store.loadIdentity();
+        store.setTranslation(position);
+        store.setRotationQuaternion(rotation);
+        store.setScale(scale);
+        return store;
+    }
+
+    /**
+     * The space of target or owner transformation.
+     * 
+     * @author Marcin Roguski (Kaelthas)
+     */
+    public static enum Space {
+        /** A transformation of the bone or spatial in the world space. */
+        CONSTRAINT_SPACE_WORLD,
+        /**
+         * For spatial it is the transformation in its parent space or in WORLD space if it has no parent.
+         * For bone it is a transformation in its bone parent space or in armature space if it has no parent.
+         */
+        CONSTRAINT_SPACE_LOCAL,
+        /**
+         * This space IS NOT applicable for spatials.
+         * For bone it is a transformation in the blender's armature object space.
+         */
+        CONSTRAINT_SPACE_POSE,
+
+        CONSTRAINT_SPACE_PARLOCAL;
+
+        /**
+         * This method returns the enum instance when given the appropriate
+         * value from the blend file.
+         * 
+         * @param c
+         *            the blender's value of the space modifier
+         * @return the scape enum instance
+         */
+        public static Space valueOf(byte c) {
+            switch (c) {
+                case 0:
+                    return CONSTRAINT_SPACE_WORLD;
+                case 1:
+                    return CONSTRAINT_SPACE_LOCAL;
+                case 2:
+                    return CONSTRAINT_SPACE_POSE;
+                case 3:
+                    return CONSTRAINT_SPACE_PARLOCAL;
+                default:
+                    throw new IllegalArgumentException("Value: " + c + " cannot be converted to Space enum instance!");
+            }
+        }
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/SimulationNode.java

@@ -0,0 +1,397 @@
+package com.jme3.scene.plugins.blender.constraints;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.Stack;
+import java.util.logging.Logger;
+
+import com.jme3.animation.AnimChannel;
+import com.jme3.animation.AnimControl;
+import com.jme3.animation.Animation;
+import com.jme3.animation.Bone;
+import com.jme3.animation.BoneTrack;
+import com.jme3.animation.Skeleton;
+import com.jme3.animation.SpatialTrack;
+import com.jme3.animation.Track;
+import com.jme3.math.Quaternion;
+import com.jme3.math.Transform;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.Node;
+import com.jme3.scene.Spatial;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.BlenderContext.LoadedDataType;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
+import com.jme3.scene.plugins.blender.objects.ObjectHelper;
+import com.jme3.util.TempVars;
+
+/**
+ * A node that represents either spatial or bone in constraint simulation. The
+ * node is applied its translation, rotation and scale for each frame of its
+ * animation. Then the constraints are applied that will eventually alter it.
+ * After that the feature's transformation is stored in VirtualTrack which is
+ * converted to new bone or spatial track at the very end.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class SimulationNode {
+    private static final Logger LOGGER = Logger.getLogger(SimulationNode.class.getName());
+
+    private Long                 featureOMA;
+    /** The blender context. */
+    private BlenderContext       blenderContext;
+    /** The name of the node (for debugging purposes). */
+    private String               name;
+    /** A list of children for the node (either bones or child spatials). */
+    private List<SimulationNode> children = new ArrayList<SimulationNode>();
+    /** A list of node's animations. */
+    private List<Animation>      animations;
+
+    /** The nodes spatial (if null then the boneContext should be set). */
+    private Spatial     spatial;
+    /** The skeleton of the bone (not null if the node simulated the bone). */
+    private Skeleton    skeleton;
+    /** Animation controller for the node's feature. */
+    private AnimControl animControl;
+
+    /**
+     * The star transform of a spatial. Needed to properly reset the spatial to
+     * its start position.
+     */
+    private Transform            spatialStartTransform;
+    /** Star transformations for bones. Needed to properly reset the bones. */
+    private Map<Bone, Transform> boneStartTransforms;
+
+    /**
+     * Builds the nodes tree for the given feature. The feature (bone or
+     * spatial) is found by its OMA. The feature must be a root bone or a root
+     * spatial.
+     * 
+     * @param featureOMA
+     *            the OMA of either bone or spatial
+     * @param blenderContext
+     *            the blender context
+     */
+    public SimulationNode(Long featureOMA, BlenderContext blenderContext) {
+        this(featureOMA, blenderContext, true);
+    }
+
+    /**
+     * Creates the node for the feature.
+     * 
+     * @param featureOMA
+     *            the OMA of either bone or spatial
+     * @param blenderContext
+     *            the blender context
+     * @param rootNode
+     *            indicates if the feature is a root bone or root spatial or not
+     */
+    private SimulationNode(Long featureOMA, BlenderContext blenderContext, boolean rootNode) {
+        this.featureOMA = featureOMA;
+        this.blenderContext = blenderContext;
+        Node spatial = (Node) blenderContext.getLoadedFeature(featureOMA, LoadedDataType.FEATURE);
+        if (blenderContext.getMarkerValue(ObjectHelper.ARMATURE_NODE_MARKER, spatial) != null) {
+            skeleton = blenderContext.getSkeleton(featureOMA);
+
+            Node nodeWithAnimationControl = blenderContext.getControlledNode(skeleton);
+            animControl = nodeWithAnimationControl.getControl(AnimControl.class);
+
+            boneStartTransforms = new HashMap<Bone, Transform>();
+            for (int i = 0; i < skeleton.getBoneCount(); ++i) {
+                Bone bone = skeleton.getBone(i);
+                boneStartTransforms.put(bone, new Transform(bone.getBindPosition(), bone.getBindRotation(), bone.getBindScale()));
+            }
+        } else {
+            if (rootNode && spatial.getParent() != null) {
+                throw new IllegalStateException("Given spatial must be a root node!");
+            }
+            this.spatial = spatial;
+            spatialStartTransform = spatial.getLocalTransform().clone();
+        }
+
+        name = '>' + spatial.getName() + '<';
+
+        // add children nodes
+        if (skeleton != null) {
+            Node node = blenderContext.getControlledNode(skeleton);
+            Long animatedNodeOMA = ((Number) blenderContext.getMarkerValue(ObjectHelper.OMA_MARKER, node)).longValue();
+            animations = blenderContext.getAnimations(animatedNodeOMA);
+        } else {
+            animations = blenderContext.getAnimations(featureOMA);
+            for (Spatial child : spatial.getChildren()) {
+                if (child instanceof Node) {
+                    children.add(new SimulationNode((Long) blenderContext.getMarkerValue(ObjectHelper.OMA_MARKER, child), blenderContext, false));
+                }
+            }
+        }
+    }
+
+    /**
+     * Resets the node's feature to its starting transformation.
+     */
+    private void reset() {
+        if (spatial != null) {
+            spatial.setLocalTransform(spatialStartTransform);
+            for (SimulationNode child : children) {
+                child.reset();
+            }
+        } else if (skeleton != null) {
+            for (Entry<Bone, Transform> entry : boneStartTransforms.entrySet()) {
+                Transform t = entry.getValue();
+                entry.getKey().setBindTransforms(t.getTranslation(), t.getRotation(), t.getScale());
+                entry.getKey().updateModelTransforms();
+            }
+            skeleton.reset();
+        }
+    }
+
+    /**
+     * Simulates the spatial node.
+     */
+    private void simulateSpatial() {
+        List<Constraint> constraints = blenderContext.getConstraints(featureOMA);
+        if (constraints != null && constraints.size() > 0) {
+            LOGGER.fine("Simulating spatial.");
+            boolean applyStaticConstraints = true;
+            if (animations != null) {
+                for (Animation animation : animations) {
+                    float[] animationTimeBoundaries = this.computeAnimationTimeBoundaries(animation);
+                    int maxFrame = (int) animationTimeBoundaries[0];
+                    float maxTime = animationTimeBoundaries[1];
+
+                    VirtualTrack vTrack = new VirtualTrack(spatial.getName(), maxFrame, maxTime);
+                    for (Track track : animation.getTracks()) {
+                        for (int frame = 0; frame < maxFrame; ++frame) {
+                            spatial.setLocalTranslation(((SpatialTrack) track).getTranslations()[frame]);
+                            spatial.setLocalRotation(((SpatialTrack) track).getRotations()[frame]);
+                            spatial.setLocalScale(((SpatialTrack) track).getScales()[frame]);
+
+                            for (Constraint constraint : constraints) {
+                                constraint.apply(frame);
+                                vTrack.setTransform(frame, spatial.getLocalTransform());
+                            }
+                        }
+                        Track newTrack = vTrack.getAsSpatialTrack();
+                        if (newTrack != null) {
+                            animation.removeTrack(track);
+                            animation.addTrack(newTrack);
+                        }
+                        applyStaticConstraints = false;
+                    }
+                }
+            }
+
+            // if there are no animations then just constraint the static
+            // object's transformation
+            if (applyStaticConstraints) {
+                for (Constraint constraint : constraints) {
+                    constraint.apply(0);
+                }
+            }
+        }
+
+        for (SimulationNode child : children) {
+            child.simulate();
+        }
+    }
+
+    /**
+     * Simulates the bone node.
+     */
+    private void simulateSkeleton() {
+        LOGGER.fine("Simulating skeleton.");
+        Set<Long> alteredOmas = new HashSet<Long>();
+
+        if (animations != null) {
+            TempVars vars = TempVars.get();
+            AnimChannel animChannel = animControl.createChannel();
+
+            for (Animation animation : animations) {
+                float[] animationTimeBoundaries = this.computeAnimationTimeBoundaries(animation);
+                int maxFrame = (int) animationTimeBoundaries[0];
+                float maxTime = animationTimeBoundaries[1];
+
+                Map<Integer, VirtualTrack> tracks = new HashMap<Integer, VirtualTrack>();
+                for (int frame = 0; frame < maxFrame; ++frame) {
+                    // this MUST be done here, otherwise setting next frame of animation will
+                    // lead to possible errors
+                    this.reset();
+
+                    // first set proper time for all bones in all the tracks ...
+                    for (Track track : animation.getTracks()) {
+                        float time = ((BoneTrack) track).getTimes()[frame];
+                        track.setTime(time, 1, animControl, animChannel, vars);
+                        skeleton.updateWorldVectors();
+                    }
+
+                    // ... and then apply constraints from the root bone to the last child ...
+                    Set<Long> applied = new HashSet<Long>();
+                    for (Bone rootBone : skeleton.getRoots()) {
+                        // ignore the 0-indexed bone
+                        if (skeleton.getBoneIndex(rootBone) > 0) {
+                            this.applyConstraints(rootBone, alteredOmas, applied, frame, new Stack<Bone>());
+                        }
+                    }
+
+                    // ... add virtual tracks if necessary, for bones that were altered but had no tracks before ...
+                    for (Long boneOMA : alteredOmas) {
+                        BoneContext boneContext = blenderContext.getBoneContext(boneOMA);
+                        int boneIndex = skeleton.getBoneIndex(boneContext.getBone());
+                        if (!tracks.containsKey(boneIndex)) {
+                            tracks.put(boneIndex, new VirtualTrack(boneContext.getBone().getName(), maxFrame, maxTime));
+                        }
+                    }
+                    alteredOmas.clear();
+
+                    // ... and fill in another frame in the result track
+                    for (Entry<Integer, VirtualTrack> trackEntry : tracks.entrySet()) {
+                        Bone bone = skeleton.getBone(trackEntry.getKey());
+                        Transform startTransform = boneStartTransforms.get(bone);
+
+                        // track contains differences between the frame position and bind positions of bones/spatials
+                        Vector3f bonePositionDifference = bone.getLocalPosition().subtract(startTransform.getTranslation());
+                        Quaternion boneRotationDifference = startTransform.getRotation().inverse().mult(bone.getLocalRotation()).normalizeLocal();
+                        Vector3f boneScaleDifference = bone.getLocalScale().divide(startTransform.getScale());
+
+                        trackEntry.getValue().setTransform(frame, new Transform(bonePositionDifference, boneRotationDifference, boneScaleDifference));
+                    }
+                }
+
+                for (Entry<Integer, VirtualTrack> trackEntry : tracks.entrySet()) {
+                    Track newTrack = trackEntry.getValue().getAsBoneTrack(trackEntry.getKey());
+                    if (newTrack != null) {
+                        boolean trackReplaced = false;
+                        for (Track track : animation.getTracks()) {
+                            if (((BoneTrack) track).getTargetBoneIndex() == trackEntry.getKey().intValue()) {
+                                animation.removeTrack(track);
+                                animation.addTrack(newTrack);
+                                trackReplaced = true;
+                                break;
+                            }
+                        }
+                        if (!trackReplaced) {
+                            animation.addTrack(newTrack);
+                        }
+                    }
+                }
+            }
+            vars.release();
+            animControl.clearChannels();
+            this.reset();
+        }
+    }
+
+    /**
+     * Applies constraints to the given bone and its children.
+     * The goal is to apply constraint from root bone to the last child.
+     * @param bone
+     *            the bone whose constraints will be applied
+     * @param alteredOmas
+     *            the set of OMAS of the altered bones (is populated if necessary)
+     * @param frame
+     *            the current frame of the animation
+     * @param bonesStack
+     *            the stack of bones used to avoid infinite loops while applying constraints
+     */
+    private void applyConstraints(Bone bone, Set<Long> alteredOmas, Set<Long> applied, int frame, Stack<Bone> bonesStack) {
+        if (!bonesStack.contains(bone)) {
+            bonesStack.push(bone);
+            BoneContext boneContext = blenderContext.getBoneContext(bone);
+            if (!applied.contains(boneContext.getBoneOma())) {
+                List<Constraint> constraints = this.findConstraints(boneContext.getBoneOma(), blenderContext);
+                if (constraints != null && constraints.size() > 0) {
+                    for (Constraint constraint : constraints) {
+                        if (constraint.getTargetOMA() != null && constraint.getTargetOMA() > 0L) {
+                            // first apply constraints of the target bone
+                            BoneContext targetBone = blenderContext.getBoneContext(constraint.getTargetOMA());
+                            this.applyConstraints(targetBone.getBone(), alteredOmas, applied, frame, bonesStack);
+                        }
+                        constraint.apply(frame);
+                        if (constraint.getAlteredOmas() != null) {
+                            alteredOmas.addAll(constraint.getAlteredOmas());
+                        }
+                        alteredOmas.add(boneContext.getBoneOma());
+                    }
+                }
+                applied.add(boneContext.getBoneOma());
+            }
+
+            List<Bone> children = bone.getChildren();
+            if (children != null && children.size() > 0) {
+                for (Bone child : bone.getChildren()) {
+                    this.applyConstraints(child, alteredOmas, applied, frame, bonesStack);
+                }
+            }
+            bonesStack.pop();
+        }
+    }
+
+    /**
+     * Simulates the node.
+     */
+    public void simulate() {
+        this.reset();
+        if (spatial != null) {
+            this.simulateSpatial();
+        } else {
+            this.simulateSkeleton();
+        }
+    }
+
+    /**
+     * Computes the maximum frame and time for the animation. Different tracks
+     * can have different lengths so here the maximum one is being found.
+     * 
+     * @param animation
+     *            the animation
+     * @return maximum frame and time of the animation
+     */
+    private float[] computeAnimationTimeBoundaries(Animation animation) {
+        int maxFrame = Integer.MIN_VALUE;
+        float maxTime = -Float.MAX_VALUE;
+        for (Track track : animation.getTracks()) {
+            if (track instanceof BoneTrack) {
+                maxFrame = Math.max(maxFrame, ((BoneTrack) track).getTranslations().length);
+                maxTime = Math.max(maxTime, ((BoneTrack) track).getTimes()[((BoneTrack) track).getTimes().length - 1]);
+            } else if (track instanceof SpatialTrack) {
+                maxFrame = Math.max(maxFrame, ((SpatialTrack) track).getTranslations().length);
+                maxTime = Math.max(maxTime, ((SpatialTrack) track).getTimes()[((SpatialTrack) track).getTimes().length - 1]);
+            } else {
+                throw new IllegalStateException("Unsupported track type for simuation: " + track);
+            }
+        }
+        return new float[] { maxFrame, maxTime };
+    }
+
+    /**
+     * Finds constraints for the node's features.
+     * 
+     * @param ownerOMA
+     *            the feature's OMA
+     * @param blenderContext
+     *            the blender context
+     * @return a list of feature's constraints or empty list if none were found
+     */
+    private List<Constraint> findConstraints(Long ownerOMA, BlenderContext blenderContext) {
+        List<Constraint> result = new ArrayList<Constraint>();
+        List<Constraint> constraints = blenderContext.getConstraints(ownerOMA);
+        if (constraints != null) {
+            for (Constraint constraint : constraints) {
+                if (constraint.isImplemented() && constraint.validate() && constraint.isTrackToBeChanged()) {
+                    result.add(constraint);
+                }
+                // TODO: add proper warnings to some map or set so that they are not logged on every frame
+            }
+        }
+        return result.size() > 0 ? result : null;
+    }
+
+    @Override
+    public String toString() {
+        return name;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/SkeletonConstraint.java

@@ -0,0 +1,41 @@
+package com.jme3.scene.plugins.blender.constraints;
+
+import java.util.logging.Logger;
+
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.animations.Ipo;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * Constraint applied on the skeleton. This constraint is here only to make the
+ * application not crash when loads constraints applied to armature. But
+ * skeleton movement is not supported by jme so the constraint will never be
+ * applied.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class SkeletonConstraint extends Constraint {
+    private static final Logger LOGGER = Logger.getLogger(SkeletonConstraint.class.getName());
+
+    public SkeletonConstraint(Structure constraintStructure, Long ownerOMA, Ipo influenceIpo, BlenderContext blenderContext) throws BlenderFileException {
+        super(constraintStructure, ownerOMA, influenceIpo, blenderContext);
+    }
+
+    @Override
+    public boolean validate() {
+        LOGGER.warning("Constraints for skeleton are not supported.");
+        return false;
+    }
+
+    @Override
+    public void apply(int frame) {
+        LOGGER.warning("Applying constraints to skeleton is not supported.");
+    }
+    
+    @Override
+    public Long getTargetOMA() {
+        LOGGER.warning("Constraints for skeleton are not supported.");
+        return null;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/SpatialConstraint.java

@@ -0,0 +1,32 @@
+package com.jme3.scene.plugins.blender.constraints;
+
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.BlenderContext.LoadedDataType;
+import com.jme3.scene.plugins.blender.animations.Ipo;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * Constraint applied on the spatial objects. This includes: nodes, cameras
+ * nodes and light nodes.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class SpatialConstraint extends Constraint {
+    public SpatialConstraint(Structure constraintStructure, Long ownerOMA, Ipo influenceIpo, BlenderContext blenderContext) throws BlenderFileException {
+        super(constraintStructure, ownerOMA, influenceIpo, blenderContext);
+    }
+
+    @Override
+    public boolean validate() {
+        if (targetOMA != null) {
+            return blenderContext.getLoadedFeature(targetOMA, LoadedDataType.FEATURE) != null;
+        }
+        return constraintDefinition == null ? true : constraintDefinition.isTargetRequired();
+    }
+    
+    @Override
+    public Long getTargetOMA() {
+        return targetOMA;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/VirtualTrack.java

@@ -0,0 +1,165 @@
+package com.jme3.scene.plugins.blender.constraints;
+
+import java.util.ArrayList;
+
+import com.jme3.animation.BoneTrack;
+import com.jme3.animation.SpatialTrack;
+import com.jme3.math.Quaternion;
+import com.jme3.math.Transform;
+import com.jme3.math.Vector3f;
+
+/**
+ * A virtual track that stores computed frames after constraints are applied.
+ * Not all the frames need to be inserted. If there are lacks then the class
+ * will fill the gaps.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class VirtualTrack {
+    /** The name of the track (for debugging purposes). */
+    private String               name;
+    /** The last frame for the track. */
+    public int                   maxFrame;
+    /** The max time for the track. */
+    public float                 maxTime;
+    /** Translations of the track. */
+    public ArrayList<Vector3f>   translations;
+    /** Rotations of the track. */
+    public ArrayList<Quaternion> rotations;
+    /** Scales of the track. */
+    public ArrayList<Vector3f>   scales;
+
+    /**
+     * Constructs the object storing the maximum frame and time.
+     * 
+     * @param maxFrame
+     *            the last frame for the track
+     * @param maxTime
+     *            the max time for the track
+     */
+    public VirtualTrack(String name, int maxFrame, float maxTime) {
+        this.name = name;
+        this.maxFrame = maxFrame;
+        this.maxTime = maxTime;
+    }
+
+    /**
+     * Sets the transform for the given frame.
+     * 
+     * @param frameIndex
+     *            the frame for which the transform will be set
+     * @param transform
+     *            the transformation to be set
+     */
+    public void setTransform(int frameIndex, Transform transform) {
+        if (translations == null) {
+            translations = this.createList(Vector3f.ZERO, frameIndex);
+        }
+        this.append(translations, Vector3f.ZERO, frameIndex - translations.size());
+        translations.add(transform.getTranslation().clone());
+
+        if (rotations == null) {
+            rotations = this.createList(Quaternion.IDENTITY, frameIndex);
+        }
+        this.append(rotations, Quaternion.IDENTITY, frameIndex - rotations.size());
+        rotations.add(transform.getRotation().clone());
+
+        if (scales == null) {
+            scales = this.createList(Vector3f.UNIT_XYZ, frameIndex);
+        }
+        this.append(scales, Vector3f.UNIT_XYZ, frameIndex - scales.size());
+        scales.add(transform.getScale().clone());
+    }
+
+    /**
+     * Returns the track as a bone track.
+     * 
+     * @param targetBoneIndex
+     *            the bone index
+     * @return the bone track
+     */
+    public BoneTrack getAsBoneTrack(int targetBoneIndex) {
+        if (translations == null && rotations == null && scales == null) {
+            return null;
+        }
+        return new BoneTrack(targetBoneIndex, this.createTimes(), translations.toArray(new Vector3f[maxFrame]), rotations.toArray(new Quaternion[maxFrame]), scales.toArray(new Vector3f[maxFrame]));
+    }
+
+    /**
+     * Returns the track as a spatial track.
+     * 
+     * @return the spatial track
+     */
+    public SpatialTrack getAsSpatialTrack() {
+        if (translations == null && rotations == null && scales == null) {
+            return null;
+        }
+        return new SpatialTrack(this.createTimes(), translations.toArray(new Vector3f[maxFrame]), rotations.toArray(new Quaternion[maxFrame]), scales.toArray(new Vector3f[maxFrame]));
+    }
+
+    /**
+     * The method creates times for the track based on the given maximum values.
+     * 
+     * @return the times for the track
+     */
+    private float[] createTimes() {
+        float[] times = new float[maxFrame];
+        float dT = maxTime / maxFrame;
+        float t = 0;
+        for (int i = 0; i < maxFrame; ++i) {
+            times[i] = t;
+            t += dT;
+        }
+        return times;
+    }
+
+    /**
+     * Helper method that creates a list of a given size filled with given
+     * elements.
+     * 
+     * @param element
+     *            the element to be put into the list
+     * @param count
+     *            the list size
+     * @return the list
+     */
+    private <T> ArrayList<T> createList(T element, int count) {
+        ArrayList<T> result = new ArrayList<T>(count);
+        for (int i = 0; i < count; ++i) {
+            result.add(element);
+        }
+        return result;
+    }
+
+    /**
+     * Appends the element to the given list.
+     * 
+     * @param list
+     *            the list where the element will be appended
+     * @param element
+     *            the element to be appended
+     * @param count
+     *            how many times the element will be appended
+     */
+    private <T> void append(ArrayList<T> list, T element, int count) {
+        for (int i = 0; i < count; ++i) {
+            list.add(element);
+        }
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder result = new StringBuilder(2048);
+        result.append("TRACK: ").append(name).append('\n');
+        if (translations != null && translations.size() > 0) {
+            result.append("TRANSLATIONS: ").append(translations.toString()).append('\n');
+        }
+        if (rotations != null && rotations.size() > 0) {
+            result.append("ROTATIONS:    ").append(rotations.toString()).append('\n');
+        }
+        if (scales != null && scales.size() > 0) {
+            result.append("SCALES:       ").append(scales.toString()).append('\n');
+        }
+        return result.toString();
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinition.java

@@ -0,0 +1,162 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import java.util.Set;
+
+import com.jme3.animation.Bone;
+import com.jme3.math.Transform;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.BlenderContext.LoadedDataType;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * A base class for all constraint definitions.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+public abstract class ConstraintDefinition {
+    protected ConstraintHelper constraintHelper;
+    /** Constraints flag. Used to load user's options applied to the constraint. */
+    protected int              flag;
+    /** The constraint's owner. Loaded during runtime. */
+    private Object             owner;
+    /** The blender context. */
+    protected BlenderContext   blenderContext;
+    /** The constraint's owner OMA. */
+    protected Long             ownerOMA;
+    /** Stores the OMA addresses of all features whose transform had been altered beside the constraint owner. */
+    protected Set<Long>        alteredOmas;
+    /** The variable that determines if the constraint will alter the track in any way. */
+    protected boolean          trackToBeChanged = true;
+    /** The name of the constraint. */
+    protected String           constraintName;
+
+    /**
+     * Loads a constraint definition based on the constraint definition
+     * structure.
+     * 
+     * @param constraintData
+     *            the constraint definition structure
+     * @param ownerOMA
+     *            the constraint's owner OMA
+     * @param blenderContext
+     *            the blender context
+     */
+    public ConstraintDefinition(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        if (constraintData != null) {// Null constraint has no data
+            Number flag = (Number) constraintData.getFieldValue("flag");
+            if (flag != null) {
+                this.flag = flag.intValue();
+            }
+        }
+        this.blenderContext = blenderContext;
+        constraintHelper = (ConstraintHelper) (blenderContext == null ? null : blenderContext.getHelper(ConstraintHelper.class));
+        this.ownerOMA = ownerOMA;
+    }
+    
+    public void setConstraintName(String constraintName) {
+        this.constraintName = constraintName;
+    }
+
+    /**
+     * @return determines if the definition of the constraint will change the bone in any way; in most cases
+     *         it is possible to tell that even before the constraint baking simulation is started, so we can discard such bones from constraint
+     *         computing to improve the computation speed and lower the computations complexity
+     */
+    public boolean isTrackToBeChanged() {
+        return trackToBeChanged;
+    }
+
+    /**
+     * @return determines if this constraint definition requires a defined target or not
+     */
+    public abstract boolean isTargetRequired();
+
+    /**
+     * This method is here because we have no guarantee that the owner is loaded
+     * when constraint is being created. So use it to get the owner when it is
+     * needed for computations.
+     * 
+     * @return the owner of the constraint or null if none is set
+     */
+    protected Object getOwner() {
+        if (ownerOMA != null && owner == null) {
+            owner = blenderContext.getLoadedFeature(ownerOMA, LoadedDataType.FEATURE);
+            if (owner == null) {
+                throw new IllegalStateException("Cannot load constraint's owner for constraint type: " + this.getClass().getName());
+            }
+        }
+        return owner;
+    }
+
+    /**
+     * The method gets the owner's transformation. The owner can be either bone or spatial.
+     * @param ownerSpace
+     *            the space in which the computed transformation is given
+     * @return the constraint owner's transformation
+     */
+    protected Transform getOwnerTransform(Space ownerSpace) {
+        if (this.getOwner() instanceof Bone) {
+            BoneContext boneContext = blenderContext.getBoneContext(ownerOMA);
+            return constraintHelper.getTransform(boneContext.getArmatureObjectOMA(), boneContext.getBone().getName(), ownerSpace);
+        }
+        return constraintHelper.getTransform(ownerOMA, null, ownerSpace);
+    }
+
+    /**
+     * The method applies the given transformation to the owner.
+     * @param ownerTransform
+     *            the transformation to apply to the owner
+     * @param ownerSpace
+     *            the space that defines which owner's transformation (ie. global, local, etc. will be set)
+     */
+    protected void applyOwnerTransform(Transform ownerTransform, Space ownerSpace) {
+        if (this.getOwner() instanceof Bone) {
+            BoneContext boneContext = blenderContext.getBoneContext(ownerOMA);
+            constraintHelper.applyTransform(boneContext.getArmatureObjectOMA(), boneContext.getBone().getName(), ownerSpace, ownerTransform);
+        } else {
+            constraintHelper.applyTransform(ownerOMA, null, ownerSpace, ownerTransform);
+        }
+    }
+
+    /**
+     * @return <b>true</b> if the definition is implemented and <b>false</b>
+     *         otherwise
+     */
+    public boolean isImplemented() {
+        return true;
+    }
+
+    /**
+     * @return a list of all OMAs of the features that the constraint had altered beside its owner
+     */
+    public Set<Long> getAlteredOmas() {
+        return alteredOmas;
+    }
+
+    /**
+     * @return the type name of the constraint
+     */
+    public abstract String getConstraintTypeName();
+
+    /**
+     * Bakes the constraint for the current feature (bone or spatial) position.
+     * 
+     * @param ownerSpace
+     *            the space where owner transform will be evaluated in
+     * @param targetSpace
+     *            the space where target transform will be evaluated in
+     * @param targetTransform
+     *            the target transform used by some of the constraints
+     * @param influence
+     *            the influence of the constraint from range [0; 1]
+     */
+    public abstract void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence);
+
+    @Override
+    public String toString() {
+        return this.getConstraintTypeName();
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionDistLimit.java

@@ -0,0 +1,84 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import com.jme3.animation.Bone;
+import com.jme3.math.Transform;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * This class represents 'Dist limit' constraint type in blender.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class ConstraintDefinitionDistLimit extends ConstraintDefinition {
+    private static final int LIMITDIST_INSIDE    = 0;
+    private static final int LIMITDIST_OUTSIDE   = 1;
+    private static final int LIMITDIST_ONSURFACE = 2;
+
+    protected int            mode;
+    protected float          dist;
+
+    public ConstraintDefinitionDistLimit(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        super(constraintData, ownerOMA, blenderContext);
+        mode = ((Number) constraintData.getFieldValue("mode")).intValue();
+        dist = ((Number) constraintData.getFieldValue("dist")).floatValue();
+    }
+
+    @Override
+    public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
+        if (this.getOwner() instanceof Bone && ((Bone) this.getOwner()).getParent() != null && blenderContext.getBoneContext(ownerOMA).is(BoneContext.CONNECTED_TO_PARENT)) {
+            // distance limit does not work on bones who are connected to their parent
+            return;
+        }
+        if (influence == 0 || targetTransform == null) {
+            return;// no need to do anything
+        }
+
+        Transform ownerTransform = this.getOwnerTransform(ownerSpace);
+
+        Vector3f v = ownerTransform.getTranslation().subtract(targetTransform.getTranslation());
+        float currentDistance = v.length();
+        switch (mode) {
+            case LIMITDIST_INSIDE:
+                if (currentDistance >= dist) {
+                    v.normalizeLocal();
+                    v.multLocal(dist + (currentDistance - dist) * (1.0f - influence));
+                    ownerTransform.getTranslation().set(v.addLocal(targetTransform.getTranslation()));
+                }
+                break;
+            case LIMITDIST_ONSURFACE:
+                if (currentDistance > dist) {
+                    v.normalizeLocal();
+                    v.multLocal(dist + (currentDistance - dist) * (1.0f - influence));
+                    ownerTransform.getTranslation().set(v.addLocal(targetTransform.getTranslation()));
+                } else if (currentDistance < dist) {
+                    v.normalizeLocal().multLocal(dist * influence);
+                    ownerTransform.getTranslation().set(targetTransform.getTranslation().add(v));
+                }
+                break;
+            case LIMITDIST_OUTSIDE:
+                if (currentDistance <= dist) {
+                    v = targetTransform.getTranslation().subtract(ownerTransform.getTranslation()).normalizeLocal().multLocal(dist * influence);
+                    ownerTransform.getTranslation().set(targetTransform.getTranslation().add(v));
+                }
+                break;
+            default:
+                throw new IllegalStateException("Unknown distance limit constraint mode: " + mode);
+        }
+
+        this.applyOwnerTransform(ownerTransform, ownerSpace);
+    }
+
+    @Override
+    public boolean isTargetRequired() {
+        return true;
+    }
+
+    @Override
+    public String getConstraintTypeName() {
+        return "Limit distance";
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionFactory.java

@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2009-2012 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.file.BlenderFileException;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+public class ConstraintDefinitionFactory {
+    private static final Map<String, Class<? extends ConstraintDefinition>> CONSTRAINT_CLASSES      = new HashMap<String, Class<? extends ConstraintDefinition>>();
+    static {
+        CONSTRAINT_CLASSES.put("bDistLimitConstraint", ConstraintDefinitionDistLimit.class);
+        CONSTRAINT_CLASSES.put("bLocateLikeConstraint", ConstraintDefinitionLocLike.class);
+        CONSTRAINT_CLASSES.put("bLocLimitConstraint", ConstraintDefinitionLocLimit.class);
+        CONSTRAINT_CLASSES.put("bNullConstraint", ConstraintDefinitionNull.class);
+        CONSTRAINT_CLASSES.put("bRotateLikeConstraint", ConstraintDefinitionRotLike.class);
+        CONSTRAINT_CLASSES.put("bRotLimitConstraint", ConstraintDefinitionRotLimit.class);
+        CONSTRAINT_CLASSES.put("bSizeLikeConstraint", ConstraintDefinitionSizeLike.class);
+        CONSTRAINT_CLASSES.put("bSizeLimitConstraint", ConstraintDefinitionSizeLimit.class);
+        CONSTRAINT_CLASSES.put("bKinematicConstraint", ConstraintDefinitionIK.class);
+        CONSTRAINT_CLASSES.put("bTransLikeConstraint", ConstraintDefinitionTransLike.class);// since blender 2.51
+        CONSTRAINT_CLASSES.put("bSameVolumeConstraint", ConstraintDefinitionMaintainVolume.class);// since blender 2.53
+    }
+
+    private static final Map<String, String>                                UNSUPPORTED_CONSTRAINTS = new HashMap<String, String>();
+    static {
+        UNSUPPORTED_CONSTRAINTS.put("bActionConstraint", "Action");
+        UNSUPPORTED_CONSTRAINTS.put("bChildOfConstraint", "Child of");
+        UNSUPPORTED_CONSTRAINTS.put("bClampToConstraint", "Clamp to");
+        UNSUPPORTED_CONSTRAINTS.put("bFollowPathConstraint", "Follow path");
+        UNSUPPORTED_CONSTRAINTS.put("bLockTrackConstraint", "Lock track");
+        UNSUPPORTED_CONSTRAINTS.put("bMinMaxConstraint", "Min max");
+        UNSUPPORTED_CONSTRAINTS.put("bPythonConstraint", "Python/Script");
+        UNSUPPORTED_CONSTRAINTS.put("bRigidBodyJointConstraint", "Rigid body joint");
+        UNSUPPORTED_CONSTRAINTS.put("bShrinkWrapConstraint", "Shrinkwrap");
+        UNSUPPORTED_CONSTRAINTS.put("bStretchToConstraint", "Stretch to");
+        UNSUPPORTED_CONSTRAINTS.put("bTransformConstraint", "Transform");
+        // Blender 2.50+
+        UNSUPPORTED_CONSTRAINTS.put("bSplineIKConstraint", "Spline inverse kinematics");
+        UNSUPPORTED_CONSTRAINTS.put("bDampTrackConstraint", "Damp track");
+        UNSUPPORTED_CONSTRAINTS.put("bPivotConstraint", "Pivot");
+        // Blender 2.56+
+        UNSUPPORTED_CONSTRAINTS.put("bTrackToConstraint", "Track to");
+        // Blender 2.62+
+        UNSUPPORTED_CONSTRAINTS.put("bCameraSolverConstraint", "Camera solver");
+        UNSUPPORTED_CONSTRAINTS.put("bObjectSolverConstraint", "Object solver");
+        UNSUPPORTED_CONSTRAINTS.put("bFollowTrackConstraint", "Follow track");
+    }
+
+    /**
+     * This method creates the constraint instance.
+     * 
+     * @param constraintStructure
+     *            the constraint's structure (bConstraint clss in blender 2.49).
+     *            If the value is null the NullConstraint is created.
+     * @param blenderContext
+     *            the blender context
+     * @throws BlenderFileException
+     *             this exception is thrown when the blender file is somehow
+     *             corrupted
+     */
+    public static ConstraintDefinition createConstraintDefinition(Structure constraintStructure, String constraintName, Long ownerOMA, BlenderContext blenderContext) throws BlenderFileException {
+        if (constraintStructure == null) {
+            return new ConstraintDefinitionNull(null, ownerOMA, blenderContext);
+        }
+        String constraintClassName = constraintStructure.getType();
+        Class<? extends ConstraintDefinition> constraintDefinitionClass = CONSTRAINT_CLASSES.get(constraintClassName);
+        if (constraintDefinitionClass != null) {
+            try {
+                ConstraintDefinition def = (ConstraintDefinition) constraintDefinitionClass.getDeclaredConstructors()[0].newInstance(constraintStructure, ownerOMA, blenderContext);
+                def.setConstraintName(constraintName);
+                return def;
+            } catch (IllegalArgumentException e) {
+                throw new BlenderFileException(e.getLocalizedMessage(), e);
+            } catch (SecurityException e) {
+                throw new BlenderFileException(e.getLocalizedMessage(), e);
+            } catch (InstantiationException e) {
+                throw new BlenderFileException(e.getLocalizedMessage(), e);
+            } catch (IllegalAccessException e) {
+                throw new BlenderFileException(e.getLocalizedMessage(), e);
+            } catch (InvocationTargetException e) {
+                throw new BlenderFileException(e.getLocalizedMessage(), e);
+            }
+        } else {
+            String unsupportedConstraintClassName = UNSUPPORTED_CONSTRAINTS.get(constraintClassName);
+            if (unsupportedConstraintClassName != null) {
+                return new UnsupportedConstraintDefinition(unsupportedConstraintClassName);
+            } else {
+                throw new BlenderFileException("Unknown constraint type: " + constraintClassName);
+            }
+        }
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionIK.java

@@ -0,0 +1,236 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+
+import org.ejml.simple.SimpleMatrix;
+
+import com.jme3.animation.Bone;
+import com.jme3.math.Transform;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.blender.math.DQuaternion;
+import com.jme3.scene.plugins.blender.math.DTransform;
+import com.jme3.scene.plugins.blender.math.Matrix;
+import com.jme3.scene.plugins.blender.math.Vector3d;
+
+/**
+ * A definiotion of a Inverse Kinematics constraint. This implementation uses Jacobian pseudoinverse algorithm.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class ConstraintDefinitionIK extends ConstraintDefinition {
+    private static final float MIN_DISTANCE     = 0.001f;
+    private static final float MIN_ANGLE_CHANGE = 0.001f;
+    private static final int   FLAG_USE_TAIL    = 0x01;
+    private static final int   FLAG_POSITION    = 0x20;
+
+    private BonesChain bones;
+    /** The number of affected bones. Zero means that all parent bones of the current bone should take part in baking. */
+    private int        bonesAffected;
+    /** Indicates if the tail of the bone should be used or not. */
+    private boolean    useTail;
+    /** The amount of iterations of the algorithm. */
+    private int        iterations;
+    /** The count of bones' chain. */
+    private int        bonesCount = -1;
+
+    public ConstraintDefinitionIK(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        super(constraintData, ownerOMA, blenderContext);
+        bonesAffected = ((Number) constraintData.getFieldValue("rootbone")).intValue();
+        iterations = ((Number) constraintData.getFieldValue("iterations")).intValue();
+        useTail = (flag & FLAG_USE_TAIL) != 0;
+
+        if ((flag & FLAG_POSITION) == 0) {
+            trackToBeChanged = false;
+        }
+
+        if (trackToBeChanged) {
+            alteredOmas = new HashSet<Long>();
+        }
+    }
+
+    /**
+     * Below are the variables that only need to be allocated once for IK constraint instance.
+     */
+    /** Temporal quaternion. */
+    private DQuaternion tempDQuaternion = new DQuaternion();
+    /** Temporal matrix column. */
+    private Vector3d    col             = new Vector3d();
+    /** Effector's position change. */
+    private Matrix      deltaP          = new Matrix(3, 1);
+    /** The current target position. */
+    private Vector3d    target          = new Vector3d();
+    /** Rotation vectors for each joint (allocated when we know the size of a bones' chain. */
+    private Vector3d[]  rotationVectors;
+    /** The Jacobian matrix. Allocated when the bones' chain size is known. */
+    private Matrix      J;
+
+    @Override
+    public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
+        if (influence == 0 || !trackToBeChanged || targetTransform == null || bonesCount == 0) {
+            return;// no need to do anything
+        }
+
+        if (bones == null) {
+            bones = new BonesChain((Bone) this.getOwner(), useTail, bonesAffected, alteredOmas, blenderContext);
+        }
+        if (bones.size() == 0) {
+            bonesCount = 0;
+            return;// no need to do anything
+        }
+        double distanceFromTarget = Double.MAX_VALUE;
+        target.set(targetTransform.getTranslation().x, targetTransform.getTranslation().y, targetTransform.getTranslation().z);
+
+        if (bonesCount < 0) {
+            bonesCount = bones.size();
+            rotationVectors = new Vector3d[bonesCount];
+            for (int i = 0; i < bonesCount; ++i) {
+                rotationVectors[i] = new Vector3d();
+            }
+            J = new Matrix(3, bonesCount);
+        }
+
+        BoneContext topBone = bones.get(0);
+        for (int i = 0; i < iterations; ++i) {
+            DTransform topBoneTransform = bones.getWorldTransform(topBone);
+            Vector3d e = topBoneTransform.getTranslation().add(topBoneTransform.getRotation().mult(Vector3d.UNIT_Y).multLocal(topBone.getLength()));// effector
+            distanceFromTarget = e.distance(target);
+            if (distanceFromTarget <= MIN_DISTANCE) {
+                break;
+            }
+
+            deltaP.setColumn(0, 0, target.x - e.x, target.y - e.y, target.z - e.z);
+            int column = 0;
+            for (BoneContext boneContext : bones) {
+                DTransform boneWorldTransform = bones.getWorldTransform(boneContext);
+                Vector3d j = boneWorldTransform.getTranslation(); // current join position
+                Vector3d vectorFromJointToEffector = e.subtract(j);
+                vectorFromJointToEffector.cross(target.subtract(j), rotationVectors[column]).normalizeLocal();
+                rotationVectors[column].cross(vectorFromJointToEffector, col);
+                J.setColumn(col, column++);
+            }
+            Matrix J_1 = J.pseudoinverse();
+
+            SimpleMatrix deltaThetas = J_1.mult(deltaP);
+            if (deltaThetas.elementMaxAbs() < MIN_ANGLE_CHANGE) {
+                break;
+            }
+            for (int j = 0; j < deltaThetas.numRows(); ++j) {
+                double angle = deltaThetas.get(j, 0);
+                Vector3d rotationVector = rotationVectors[j];
+
+                tempDQuaternion.fromAngleAxis(angle, rotationVector);
+                BoneContext boneContext = bones.get(j);
+                Bone bone = boneContext.getBone();
+                if (bone.equals(this.getOwner())) {
+                    if (boneContext.isLockX()) {
+                        tempDQuaternion.set(0, tempDQuaternion.getY(), tempDQuaternion.getZ(), tempDQuaternion.getW());
+                    }
+                    if (boneContext.isLockY()) {
+                        tempDQuaternion.set(tempDQuaternion.getX(), 0, tempDQuaternion.getZ(), tempDQuaternion.getW());
+                    }
+                    if (boneContext.isLockZ()) {
+                        tempDQuaternion.set(tempDQuaternion.getX(), tempDQuaternion.getY(), 0, tempDQuaternion.getW());
+                    }
+                }
+
+                DTransform boneTransform = bones.getWorldTransform(boneContext);
+                boneTransform.getRotation().set(tempDQuaternion.mult(boneTransform.getRotation()));
+                bones.setWorldTransform(boneContext, boneTransform);
+            }
+        }
+
+        // applying the results
+        for (int i = bonesCount - 1; i >= 0; --i) {
+            BoneContext boneContext = bones.get(i);
+            DTransform transform = bones.getWorldTransform(boneContext);
+            constraintHelper.applyTransform(boneContext.getArmatureObjectOMA(), boneContext.getBone().getName(), Space.CONSTRAINT_SPACE_WORLD, transform.toTransform());
+        }
+        bones = null;// need to reload them again
+    }
+
+    @Override
+    public String getConstraintTypeName() {
+        return "Inverse kinematics";
+    }
+
+    @Override
+    public boolean isTargetRequired() {
+        return true;
+    }
+
+    /**
+     * Loaded bones' chain. This class allows to operate on transform matrices that use double precision in computations.
+     * Only the final result is being transformed to single precision numbers.
+     * 
+     * @author Marcin Roguski (Kaelthas)
+     */
+    private static class BonesChain extends ArrayList<BoneContext> {
+        private static final long serialVersionUID = -1850524345643600718L;
+
+        private List<Matrix> localBonesMatrices = new ArrayList<Matrix>();
+
+        public BonesChain(Bone bone, boolean useTail, int bonesAffected, Collection<Long> alteredOmas, BlenderContext blenderContext) {
+            if (bone != null) {
+                ConstraintHelper constraintHelper = blenderContext.getHelper(ConstraintHelper.class);
+                if (!useTail) {
+                    bone = bone.getParent();
+                }
+                while (bone != null && (bonesAffected <= 0 || this.size() < bonesAffected)) {
+                    BoneContext boneContext = blenderContext.getBoneContext(bone);
+                    this.add(boneContext);
+                    alteredOmas.add(boneContext.getBoneOma());
+
+                    Transform transform = constraintHelper.getTransform(boneContext.getArmatureObjectOMA(), boneContext.getBone().getName(), Space.CONSTRAINT_SPACE_WORLD);
+                    localBonesMatrices.add(new DTransform(transform).toMatrix());
+
+                    bone = bone.getParent();
+                }
+                
+                if(localBonesMatrices.size() > 0) {
+                	// making the matrices describe the local transformation
+                    Matrix parentWorldMatrix = localBonesMatrices.get(localBonesMatrices.size() - 1);
+                    for(int i=localBonesMatrices.size() - 2;i>=0;--i) {
+                    	SimpleMatrix m = parentWorldMatrix.invert().mult(localBonesMatrices.get(i));
+                    	parentWorldMatrix = localBonesMatrices.get(i);
+                    	localBonesMatrices.set(i, new Matrix(m));
+                    }
+                }
+            }
+        }
+
+        public DTransform getWorldTransform(BoneContext bone) {
+            int index = this.indexOf(bone);
+            return this.getWorldMatrix(index).toTransform();
+        }
+
+        public void setWorldTransform(BoneContext bone, DTransform transform) {
+            int index = this.indexOf(bone);
+            Matrix boneMatrix = transform.toMatrix();
+
+            if (index < this.size() - 1) {
+                // computing the current bone local transform
+                Matrix parentWorldMatrix = this.getWorldMatrix(index + 1);
+                SimpleMatrix m = parentWorldMatrix.invert().mult(boneMatrix);
+                boneMatrix = new Matrix(m);
+            }
+            localBonesMatrices.set(index, boneMatrix);
+        }
+
+        public Matrix getWorldMatrix(int index) {
+            if (index == this.size() - 1) {
+                return new Matrix(localBonesMatrices.get(this.size() - 1));
+            }
+
+            SimpleMatrix result = this.getWorldMatrix(index + 1);
+            result = result.mult(localBonesMatrices.get(index));
+            return new Matrix(result);
+        }
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionLocLike.java

@@ -0,0 +1,107 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import com.jme3.animation.Bone;
+import com.jme3.math.Transform;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * This class represents 'Loc like' constraint type in blender.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class ConstraintDefinitionLocLike extends ConstraintDefinition {
+    private static final int LOCLIKE_X        = 0x01;
+    private static final int LOCLIKE_Y        = 0x02;
+    private static final int LOCLIKE_Z        = 0x04;
+    // protected static final int LOCLIKE_TIP = 0x08;//this is deprecated in
+    // blender
+    private static final int LOCLIKE_X_INVERT = 0x10;
+    private static final int LOCLIKE_Y_INVERT = 0x20;
+    private static final int LOCLIKE_Z_INVERT = 0x40;
+    private static final int LOCLIKE_OFFSET   = 0x80;
+
+    public ConstraintDefinitionLocLike(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        super(constraintData, ownerOMA, blenderContext);
+        if (blenderContext.getBlenderKey().isFixUpAxis()) {
+            // swapping Y and X limits flag in the bitwise flag
+            int y = flag & LOCLIKE_Y;
+            int invY = flag & LOCLIKE_Y_INVERT;
+            int z = flag & LOCLIKE_Z;
+            int invZ = flag & LOCLIKE_Z_INVERT;
+            // clear the other flags to swap them
+            flag &= LOCLIKE_X | LOCLIKE_X_INVERT | LOCLIKE_OFFSET;
+
+            flag |= y << 1;
+            flag |= invY << 1;
+            flag |= z >> 1;
+            flag |= invZ >> 1;
+
+            trackToBeChanged = (flag & LOCLIKE_X) != 0 || (flag & LOCLIKE_Y) != 0 || (flag & LOCLIKE_Z) != 0;
+        }
+    }
+
+    @Override
+    public boolean isTrackToBeChanged() {
+        // location copy does not work on bones who are connected to their parent
+        return trackToBeChanged && !(this.getOwner() instanceof Bone && ((Bone) this.getOwner()).getParent() != null && blenderContext.getBoneContext(ownerOMA).is(BoneContext.CONNECTED_TO_PARENT));
+    }
+
+    @Override
+    public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
+        if (influence == 0 || targetTransform == null || !this.isTrackToBeChanged()) {
+            return;
+        }
+
+        Transform ownerTransform = this.getOwnerTransform(ownerSpace);
+
+        Vector3f ownerLocation = ownerTransform.getTranslation();
+        Vector3f targetLocation = targetTransform.getTranslation();
+
+        Vector3f startLocation = ownerTransform.getTranslation().clone();
+        Vector3f offset = Vector3f.ZERO;
+        if ((flag & LOCLIKE_OFFSET) != 0) {// we add the original location to the copied location
+            offset = startLocation;
+        }
+
+        if ((flag & LOCLIKE_X) != 0) {
+            ownerLocation.x = targetLocation.x;
+            if ((flag & LOCLIKE_X_INVERT) != 0) {
+                ownerLocation.x = -ownerLocation.x;
+            }
+        }
+        if ((flag & LOCLIKE_Y) != 0) {
+            ownerLocation.y = targetLocation.y;
+            if ((flag & LOCLIKE_Y_INVERT) != 0) {
+                ownerLocation.y = -ownerLocation.y;
+            }
+        }
+        if ((flag & LOCLIKE_Z) != 0) {
+            ownerLocation.z = targetLocation.z;
+            if ((flag & LOCLIKE_Z_INVERT) != 0) {
+                ownerLocation.z = -ownerLocation.z;
+            }
+        }
+        ownerLocation.addLocal(offset);
+
+        if (influence < 1.0f) {
+            startLocation.subtractLocal(ownerLocation).normalizeLocal().mult(influence);
+            ownerLocation.addLocal(startLocation);
+        }
+
+        this.applyOwnerTransform(ownerTransform, ownerSpace);
+    }
+
+    @Override
+    public String getConstraintTypeName() {
+        return "Copy location";
+    }
+
+    @Override
+    public boolean isTargetRequired() {
+        return true;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionLocLimit.java

@@ -0,0 +1,106 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import com.jme3.animation.Bone;
+import com.jme3.math.Transform;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * This class represents 'Loc limit' constraint type in blender.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class ConstraintDefinitionLocLimit extends ConstraintDefinition {
+    private static final int LIMIT_XMIN = 0x01;
+    private static final int LIMIT_XMAX = 0x02;
+    private static final int LIMIT_YMIN = 0x04;
+    private static final int LIMIT_YMAX = 0x08;
+    private static final int LIMIT_ZMIN = 0x10;
+    private static final int LIMIT_ZMAX = 0x20;
+
+    protected float[][]      limits     = new float[3][2];
+
+    public ConstraintDefinitionLocLimit(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        super(constraintData, ownerOMA, blenderContext);
+        if (blenderContext.getBlenderKey().isFixUpAxis()) {
+            limits[0][0] = ((Number) constraintData.getFieldValue("xmin")).floatValue();
+            limits[0][1] = ((Number) constraintData.getFieldValue("xmax")).floatValue();
+            limits[2][0] = -((Number) constraintData.getFieldValue("ymin")).floatValue();
+            limits[2][1] = -((Number) constraintData.getFieldValue("ymax")).floatValue();
+            limits[1][0] = ((Number) constraintData.getFieldValue("zmin")).floatValue();
+            limits[1][1] = ((Number) constraintData.getFieldValue("zmax")).floatValue();
+
+            // swapping Y and X limits flag in the bitwise flag
+            int ymin = flag & LIMIT_YMIN;
+            int ymax = flag & LIMIT_YMAX;
+            int zmin = flag & LIMIT_ZMIN;
+            int zmax = flag & LIMIT_ZMAX;
+            flag &= LIMIT_XMIN | LIMIT_XMAX;// clear the other flags to swap
+                                            // them
+            flag |= ymin << 2;
+            flag |= ymax << 2;
+            flag |= zmin >> 2;
+            flag |= zmax >> 2;
+        } else {
+            limits[0][0] = ((Number) constraintData.getFieldValue("xmin")).floatValue();
+            limits[0][1] = ((Number) constraintData.getFieldValue("xmax")).floatValue();
+            limits[1][0] = ((Number) constraintData.getFieldValue("ymin")).floatValue();
+            limits[1][1] = ((Number) constraintData.getFieldValue("ymax")).floatValue();
+            limits[2][0] = ((Number) constraintData.getFieldValue("zmin")).floatValue();
+            limits[2][1] = ((Number) constraintData.getFieldValue("zmax")).floatValue();
+        }
+
+        trackToBeChanged = (flag & (LIMIT_XMIN | LIMIT_XMAX | LIMIT_YMIN | LIMIT_YMAX | LIMIT_ZMIN | LIMIT_ZMAX)) != 0;
+    }
+
+    @Override
+    public boolean isTrackToBeChanged() {
+        // location limit does not work on bones who are connected to their parent
+        return trackToBeChanged && !(this.getOwner() instanceof Bone && ((Bone) this.getOwner()).getParent() != null && blenderContext.getBoneContext(ownerOMA).is(BoneContext.CONNECTED_TO_PARENT));
+    }
+
+    @Override
+    public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
+        if (influence == 0 || !this.isTrackToBeChanged()) {
+            return;// no need to do anything
+        }
+
+        Transform ownerTransform = this.getOwnerTransform(ownerSpace);
+
+        Vector3f translation = ownerTransform.getTranslation();
+
+        if ((flag & LIMIT_XMIN) != 0 && translation.x < limits[0][0]) {
+            translation.x -= (translation.x - limits[0][0]) * influence;
+        }
+        if ((flag & LIMIT_XMAX) != 0 && translation.x > limits[0][1]) {
+            translation.x -= (translation.x - limits[0][1]) * influence;
+        }
+        if ((flag & LIMIT_YMIN) != 0 && translation.y < limits[1][0]) {
+            translation.y -= (translation.y - limits[1][0]) * influence;
+        }
+        if ((flag & LIMIT_YMAX) != 0 && translation.y > limits[1][1]) {
+            translation.y -= (translation.y - limits[1][1]) * influence;
+        }
+        if ((flag & LIMIT_ZMIN) != 0 && translation.z < limits[2][0]) {
+            translation.z -= (translation.z - limits[2][0]) * influence;
+        }
+        if ((flag & LIMIT_ZMAX) != 0 && translation.z > limits[2][1]) {
+            translation.z -= (translation.z - limits[2][1]) * influence;
+        }
+
+        this.applyOwnerTransform(ownerTransform, ownerSpace);
+    }
+
+    @Override
+    public String getConstraintTypeName() {
+        return "Limit location";
+    }
+
+    @Override
+    public boolean isTargetRequired() {
+        return false;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionMaintainVolume.java

@@ -0,0 +1,61 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import com.jme3.animation.Bone;
+import com.jme3.math.Transform;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * This class represents 'Maintain volume' constraint type in blender.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+public class ConstraintDefinitionMaintainVolume extends ConstraintDefinition {
+    private static final int FLAG_MASK_X = 0;
+    private static final int FLAG_MASK_Y = 1;
+    private static final int FLAG_MASK_Z = 2;
+
+    private float            volume;
+
+    public ConstraintDefinitionMaintainVolume(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        super(constraintData, ownerOMA, blenderContext);
+        volume = (float) Math.sqrt(((Number) constraintData.getFieldValue("volume")).floatValue());
+        trackToBeChanged = volume != 1 && (flag & (FLAG_MASK_X | FLAG_MASK_Y | FLAG_MASK_Z)) != 0;
+    }
+
+    @Override
+    public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
+        if (trackToBeChanged && influence > 0) {
+            // the maintain volume constraint is applied directly to object's scale, so no need to do it again
+            // but in case of bones we need to make computations
+            if (this.getOwner() instanceof Bone) {
+                Transform ownerTransform = this.getOwnerTransform(ownerSpace);
+                switch (flag) {
+                    case FLAG_MASK_X:
+                        ownerTransform.getScale().multLocal(1, volume, volume);
+                        break;
+                    case FLAG_MASK_Y:
+                        ownerTransform.getScale().multLocal(volume, 1, volume);
+                        break;
+                    case FLAG_MASK_Z:
+                        ownerTransform.getScale().multLocal(volume, volume, 1);
+                        break;
+                    default:
+                        throw new IllegalStateException("Unknown flag value: " + flag);
+                }
+                this.applyOwnerTransform(ownerTransform, ownerSpace);
+            }
+        }
+    }
+
+    @Override
+    public String getConstraintTypeName() {
+        return "Maintain volume";
+    }
+
+    @Override
+    public boolean isTargetRequired() {
+        return false;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionNull.java

@@ -0,0 +1,34 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import com.jme3.math.Transform;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * This class represents 'Null' constraint type in blender.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class ConstraintDefinitionNull extends ConstraintDefinition {
+
+    public ConstraintDefinitionNull(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        super(constraintData, ownerOMA, blenderContext);
+        trackToBeChanged = false;
+    }
+
+    @Override
+    public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
+        // null constraint does nothing so no need to implement this one
+    }
+
+    @Override
+    public String getConstraintTypeName() {
+        return "Null";
+    }
+
+    @Override
+    public boolean isTargetRequired() {
+        return false;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionRotLike.java

@@ -0,0 +1,87 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import com.jme3.math.Quaternion;
+import com.jme3.math.Transform;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * This class represents 'Rot like' constraint type in blender.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class ConstraintDefinitionRotLike extends ConstraintDefinition {
+    private static final int  ROTLIKE_X        = 0x01;
+    private static final int  ROTLIKE_Y        = 0x02;
+    private static final int  ROTLIKE_Z        = 0x04;
+    private static final int  ROTLIKE_X_INVERT = 0x10;
+    private static final int  ROTLIKE_Y_INVERT = 0x20;
+    private static final int  ROTLIKE_Z_INVERT = 0x40;
+    private static final int  ROTLIKE_OFFSET   = 0x80;
+
+    private transient float[] ownerAngles      = new float[3];
+    private transient float[] targetAngles     = new float[3];
+
+    public ConstraintDefinitionRotLike(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        super(constraintData, ownerOMA, blenderContext);
+        trackToBeChanged = (flag & (ROTLIKE_X | ROTLIKE_Y | ROTLIKE_Z)) != 0;
+    }
+
+    @Override
+    public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
+        if (influence == 0 || targetTransform == null || !trackToBeChanged) {
+            return;// no need to do anything
+        }
+        Transform ownerTransform = this.getOwnerTransform(ownerSpace);
+
+        Quaternion ownerRotation = ownerTransform.getRotation();
+        ownerAngles = ownerRotation.toAngles(ownerAngles);
+        targetAngles = targetTransform.getRotation().toAngles(targetAngles);
+
+        Quaternion startRotation = ownerRotation.clone();
+        Quaternion offset = Quaternion.IDENTITY;
+        if ((flag & ROTLIKE_OFFSET) != 0) {// we add the original rotation to
+                                           // the copied rotation
+            offset = startRotation;
+        }
+
+        if ((flag & ROTLIKE_X) != 0) {
+            ownerAngles[0] = targetAngles[0];
+            if ((flag & ROTLIKE_X_INVERT) != 0) {
+                ownerAngles[0] = -ownerAngles[0];
+            }
+        }
+        if ((flag & ROTLIKE_Y) != 0) {
+            ownerAngles[1] = targetAngles[1];
+            if ((flag & ROTLIKE_Y_INVERT) != 0) {
+                ownerAngles[1] = -ownerAngles[1];
+            }
+        }
+        if ((flag & ROTLIKE_Z) != 0) {
+            ownerAngles[2] = targetAngles[2];
+            if ((flag & ROTLIKE_Z_INVERT) != 0) {
+                ownerAngles[2] = -ownerAngles[2];
+            }
+        }
+        ownerRotation.fromAngles(ownerAngles).multLocal(offset);
+
+        if (influence < 1.0f) {
+            // startLocation.subtractLocal(ownerLocation).normalizeLocal().mult(influence);
+            // ownerLocation.addLocal(startLocation);
+            // TODO
+        }
+
+        this.applyOwnerTransform(ownerTransform, ownerSpace);
+    }
+
+    @Override
+    public String getConstraintTypeName() {
+        return "Copy rotation";
+    }
+
+    @Override
+    public boolean isTargetRequired() {
+        return true;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionRotLimit.java

@@ -0,0 +1,129 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import com.jme3.math.FastMath;
+import com.jme3.math.Transform;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * This class represents 'Rot limit' constraint type in blender.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class ConstraintDefinitionRotLimit extends ConstraintDefinition {
+    private static final int    LIMIT_XROT = 0x01;
+    private static final int    LIMIT_YROT = 0x02;
+    private static final int    LIMIT_ZROT = 0x04;
+
+    private transient float[][] limits     = new float[3][2];
+    private transient float[]   angles     = new float[3];
+
+    public ConstraintDefinitionRotLimit(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        super(constraintData, ownerOMA, blenderContext);
+        if (blenderContext.getBlenderKey().isFixUpAxis()) {
+            limits[0][0] = ((Number) constraintData.getFieldValue("xmin")).floatValue();
+            limits[0][1] = ((Number) constraintData.getFieldValue("xmax")).floatValue();
+            limits[2][0] = ((Number) constraintData.getFieldValue("ymin")).floatValue();
+            limits[2][1] = ((Number) constraintData.getFieldValue("ymax")).floatValue();
+            limits[1][0] = ((Number) constraintData.getFieldValue("zmin")).floatValue();
+            limits[1][1] = ((Number) constraintData.getFieldValue("zmax")).floatValue();
+
+            // swapping Y and X limits flag in the bitwise flag
+            int limitY = flag & LIMIT_YROT;
+            int limitZ = flag & LIMIT_ZROT;
+            flag &= LIMIT_XROT;// clear the other flags to swap them
+            flag |= limitY << 1;
+            flag |= limitZ >> 1;
+        } else {
+            limits[0][0] = ((Number) constraintData.getFieldValue("xmin")).floatValue();
+            limits[0][1] = ((Number) constraintData.getFieldValue("xmax")).floatValue();
+            limits[1][0] = ((Number) constraintData.getFieldValue("ymin")).floatValue();
+            limits[1][1] = ((Number) constraintData.getFieldValue("ymax")).floatValue();
+            limits[2][0] = ((Number) constraintData.getFieldValue("zmin")).floatValue();
+            limits[2][1] = ((Number) constraintData.getFieldValue("zmax")).floatValue();
+        }
+
+        // until blender 2.49 the rotations values were stored in degrees
+        if (blenderContext.getBlenderVersion() <= 249) {
+            for (int i = 0; i < 3; ++i) {
+                limits[i][0] *= FastMath.DEG_TO_RAD;
+                limits[i][1] *= FastMath.DEG_TO_RAD;
+            }
+        }
+
+        // make sure that the limits are always in range [0, 2PI)
+        // TODO: left it here because it is essential to make sure all cases
+        // work poperly
+        // but will do it a little bit later ;)
+        /*
+         * for (int i = 0; i < 3; ++i) { for (int j = 0; j < 2; ++j) { int
+         * multFactor = (int)Math.abs(limits[i][j] / FastMath.TWO_PI) ; if
+         * (limits[i][j] < 0) { limits[i][j] += FastMath.TWO_PI * (multFactor +
+         * 1); } else { limits[i][j] -= FastMath.TWO_PI * multFactor; } } //make
+         * sure the lower limit is not greater than the upper one
+         * if(limits[i][0] > limits[i][1]) { float temp = limits[i][0];
+         * limits[i][0] = limits[i][1]; limits[i][1] = temp; } }
+         */
+
+        trackToBeChanged = (flag & (LIMIT_XROT | LIMIT_YROT | LIMIT_ZROT)) != 0;
+    }
+
+    @Override
+    public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
+        if (influence == 0 || !trackToBeChanged) {
+            return;
+        }
+        Transform ownerTransform = this.getOwnerTransform(ownerSpace);
+
+        ownerTransform.getRotation().toAngles(angles);
+        // make sure that the rotations are always in range [0, 2PI)
+        // TODO: same comment as in constructor
+        /*
+         * for (int i = 0; i < 3; ++i) { int multFactor =
+         * (int)Math.abs(angles[i] / FastMath.TWO_PI) ; if(angles[i] < 0) {
+         * angles[i] += FastMath.TWO_PI * (multFactor + 1); } else { angles[i]
+         * -= FastMath.TWO_PI * multFactor; } }
+         */
+        if ((flag & LIMIT_XROT) != 0) {
+            float difference = 0.0f;
+            if (angles[0] < limits[0][0]) {
+                difference = (angles[0] - limits[0][0]) * influence;
+            } else if (angles[0] > limits[0][1]) {
+                difference = (angles[0] - limits[0][1]) * influence;
+            }
+            angles[0] -= difference;
+        }
+        if ((flag & LIMIT_YROT) != 0) {
+            float difference = 0.0f;
+            if (angles[1] < limits[1][0]) {
+                difference = (angles[1] - limits[1][0]) * influence;
+            } else if (angles[1] > limits[1][1]) {
+                difference = (angles[1] - limits[1][1]) * influence;
+            }
+            angles[1] -= difference;
+        }
+        if ((flag & LIMIT_ZROT) != 0) {
+            float difference = 0.0f;
+            if (angles[2] < limits[2][0]) {
+                difference = (angles[2] - limits[2][0]) * influence;
+            } else if (angles[2] > limits[2][1]) {
+                difference = (angles[2] - limits[2][1]) * influence;
+            }
+            angles[2] -= difference;
+        }
+        ownerTransform.getRotation().fromAngles(angles);
+
+        this.applyOwnerTransform(ownerTransform, ownerSpace);
+    }
+
+    @Override
+    public String getConstraintTypeName() {
+        return "Limit rotation";
+    }
+
+    @Override
+    public boolean isTargetRequired() {
+        return false;
+    }
+}

jme3-blender/src/main/java/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinitionSizeLike.java

@@ -0,0 +1,74 @@
+package com.jme3.scene.plugins.blender.constraints.definitions;
+
+import com.jme3.math.Transform;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
+import com.jme3.scene.plugins.blender.file.Structure;
+
+/**
+ * This class represents 'Size like' constraint type in blender.
+ * 
+ * @author Marcin Roguski (Kaelthas)
+ */
+/* package */class ConstraintDefinitionSizeLike extends ConstraintDefinition {
+    private static final int SIZELIKE_X     = 0x01;
+    private static final int SIZELIKE_Y     = 0x02;
+    private static final int SIZELIKE_Z     = 0x04;
+    private static final int LOCLIKE_OFFSET = 0x80;
+
+    public ConstraintDefinitionSizeLike(Structure constraintData, Long ownerOMA, BlenderContext blenderContext) {
+        super(constraintData, ownerOMA, blenderContext);
+        if (blenderContext.getBlenderKey().isFixUpAxis()) {
+            // swapping Y and X limits flag in the bitwise flag
+            int y = flag & SIZELIKE_Y;
+            int z = flag & SIZELIKE_Z;
+            flag &= SIZELIKE_X | LOCLIKE_OFFSET;// clear the other flags to swap
+                                                // them
+            flag |= y << 1;
+            flag |= z >> 1;
+
+            trackToBeChanged = (flag & (SIZELIKE_X | SIZELIKE_Y | SIZELIKE_Z)) != 0;
+        }
+    }
+
+    @Override
+    public void bake(Space ownerSpace, Space targetSpace, Transform targetTransform, float influence) {
+        if (influence == 0 || targetTransform == null || !trackToBeChanged) {
+            return;// no need to do anything
+        }
+        Transform ownerTransform = this.getOwnerTransform(ownerSpace);
+
+        Vector3f ownerScale = ownerTransform.getScale();
+        Vector3f targetScale = targetTransform.getScale();
+
+        Vector3f offset = Vector3f.ZERO;
+        if ((flag & LOCLIKE_OFFSET) != 0) {// we add the original scale to the
+                                           // copied scale
+            offset = ownerScale.clone();
+        }
+
+        if ((flag & SIZELIKE_X) != 0) {
+            ownerScale.x = targetScale.x * influence + (1.0f - influence) * ownerScale.x;
+        }
+        if ((flag & SIZELIKE_Y) != 0) {
+            ownerScale.y = targetScale.y * influence + (1.0f - influence) * ownerScale.y;
+        }
+        if ((flag & SIZELIKE_Z) != 0) {
+            ownerScale.z = targetScale.z * influence + (1.0f - influence) * ownerScale.z;
+        }
+        ownerScale.addLocal(offset);
+
+        this.applyOwnerTransform(ownerTransform, ownerSpace);
+    }
+
+    @Override
+    public String getConstraintTypeName() {
+        return "Copy scale";
+    }
+
+    @Override
+    public boolean isTargetRequired() {
+        return true;
+    }
+}