jmonkeyengine/engine/src/jbullet/com/jme3/bullet/collision/PhysicsCollisionObject.java

/*
 * Copyright (c) 2009-2010 jMonkeyEngine
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 * Redistribution and use in source and binary forms, with or without
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 * * Redistributions in binary form must reproduce the above copyright
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 *   may be used to endorse or promote products derived from this software
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package com.jme3.bullet.collision;

import com.jme3.asset.AssetManager;
import com.jme3.bullet.collision.shapes.CollisionShape;
import com.jme3.bullet.util.DebugShapeFactory;
import com.jme3.export.*;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.scene.Geometry;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import com.jme3.scene.debug.Arrow;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

/**
 * Base class for collision objects (PhysicsRigidBody, PhysicsGhostObject)
 * @author normenhansen
 */
public abstract class PhysicsCollisionObject implements Savable {

    protected Spatial debugShape;
    protected Arrow debugArrow;
    protected Geometry debugArrowGeom;
    protected Material debugMaterialBlue;
    protected Material debugMaterialRed;
    protected Material debugMaterialGreen;
    protected Material debugMaterialYellow;
    protected CollisionShape collisionShape;
    public static final int COLLISION_GROUP_NONE = 0x00000000;
    public static final int COLLISION_GROUP_01 = 0x00000001;
    public static final int COLLISION_GROUP_02 = 0x00000002;
    public static final int COLLISION_GROUP_03 = 0x00000004;
    public static final int COLLISION_GROUP_04 = 0x00000008;
    public static final int COLLISION_GROUP_05 = 0x00000010;
    public static final int COLLISION_GROUP_06 = 0x00000020;
    public static final int COLLISION_GROUP_07 = 0x00000040;
    public static final int COLLISION_GROUP_08 = 0x00000080;
    public static final int COLLISION_GROUP_09 = 0x00000100;
    public static final int COLLISION_GROUP_10 = 0x00000200;
    public static final int COLLISION_GROUP_11 = 0x00000400;
    public static final int COLLISION_GROUP_12 = 0x00000800;
    public static final int COLLISION_GROUP_13 = 0x00001000;
    public static final int COLLISION_GROUP_14 = 0x00002000;
    public static final int COLLISION_GROUP_15 = 0x00004000;
    public static final int COLLISION_GROUP_16 = 0x00008000;
    protected int collisionGroup = 0x00000001;
    protected int collisionGroupsMask = 0x00000001;
    private Object userObject;

    /**
     * Sets a CollisionShape to this physics object, note that the object should
     * not be in the physics space when adding a new collision shape as it is rebuilt
     * on the physics side.
     * @param collisionShape the CollisionShape to set
     */
    public void setCollisionShape(CollisionShape collisionShape) {
        this.collisionShape = collisionShape;
        updateDebugShape();
    }

    /**
     * @return the CollisionShape of this PhysicsNode, to be able to reuse it with
     * other physics nodes (increases performance)
     */
    public CollisionShape getCollisionShape() {
        return collisionShape;
    }

    /**
     * Returns the collision group for this collision shape
     * @return
     */
    public int getCollisionGroup() {
        return collisionGroup;
    }

    /**
     * Sets the collision group number for this physics object. <br>
     * The groups are integer bit masks and some pre-made variables are available in CollisionObject.
     * All physics objects are by default in COLLISION_GROUP_01.<br>
     * Two object will collide when <b>one</b> of the partys has the
     * collisionGroup of the other in its collideWithGroups set.
     * @param collisionGroup the collisionGroup to set
     */
    public void setCollisionGroup(int collisionGroup) {
        this.collisionGroup = collisionGroup;
    }

    /**
     * Add a group that this object will collide with.<br>
     * Two object will collide when <b>one</b> of the partys has the
     * collisionGroup of the other in its collideWithGroups set.<br>
     * @param collisionGroup
     */
    public void addCollideWithGroup(int collisionGroup) {
        this.collisionGroupsMask = this.collisionGroupsMask | collisionGroup;
    }

    /**
     * Remove a group from the list this object collides with.
     * @param collisionGroup
     */
    public void removeCollideWithGroup(int collisionGroup) {
        this.collisionGroupsMask = this.collisionGroupsMask & ~collisionGroup;
    }

    /**
     * Directly set the bitmask for collision groups that this object collides with.
     * @param collisionGroup
     */
    public void setCollideWithGroups(int collisionGroups) {
        this.collisionGroupsMask = collisionGroups;
    }

    /**
     * Gets the bitmask of collision groups that this object collides with.
     * @return
     */
    public int getCollideWithGroups() {
        return collisionGroupsMask;
    }

    /**
     * Creates a visual debug shape of the current collision shape of this physics object<br/>
     * <b>Does not work with detached physics, please switch to PARALLEL or SEQUENTIAL for debugging</b>
     * @param manager AssetManager to load the default wireframe material for the debug shape
     */
    protected Spatial attachDebugShape(AssetManager manager) {
        debugMaterialBlue = new Material(manager, "Common/MatDefs/Misc/Unshaded.j3md");
        debugMaterialBlue.getAdditionalRenderState().setWireframe(true);
        debugMaterialBlue.setColor("Color", ColorRGBA.Blue);
        debugMaterialGreen = new Material(manager, "Common/MatDefs/Misc/Unshaded.j3md");
        debugMaterialGreen.getAdditionalRenderState().setWireframe(true);
        debugMaterialGreen.setColor("Color", ColorRGBA.Green);
        debugMaterialRed = new Material(manager, "Common/MatDefs/Misc/Unshaded.j3md");
        debugMaterialRed.getAdditionalRenderState().setWireframe(true);
        debugMaterialRed.setColor("Color", ColorRGBA.Red);
        debugMaterialYellow = new Material(manager, "Common/MatDefs/Misc/Unshaded.j3md");
        debugMaterialYellow.getAdditionalRenderState().setWireframe(true);
        debugMaterialYellow.setColor("Color", ColorRGBA.Yellow);
        debugArrow = new Arrow(Vector3f.UNIT_XYZ);
        debugArrowGeom = new Geometry("DebugArrow", debugArrow);
        debugArrowGeom.setMaterial(debugMaterialGreen);
        return attachDebugShape();
    }
    
    /**
     * creates a debug shape for this CollisionObject
     * @param manager
     * @return 
     */
    public Spatial createDebugShape(AssetManager manager){
        return attachDebugShape(manager);
    }

    protected Spatial attachDebugShape(Material material) {
        debugMaterialBlue = material;
        debugMaterialGreen = material;
        debugMaterialRed = material;
        debugMaterialYellow = material;
        debugArrow = new Arrow(Vector3f.UNIT_XYZ);
        debugArrowGeom = new Geometry("DebugArrow", debugArrow);
        debugArrowGeom.setMaterial(debugMaterialGreen);
        return attachDebugShape();
    }

    public Spatial debugShape() {
        return debugShape;
    }

    /**
     * Creates a visual debug shape of the current collision shape of this physics object<br/>
     * <b>Does not work with detached physics, please switch to PARALLEL or SEQUENTIAL for debugging</b>
     * @param material Material to use for the debug shape
     */
    protected Spatial attachDebugShape() {
        if (debugShape != null) {
            detachDebugShape();
        }
        Spatial spatial = getDebugShape();
        this.debugShape = spatial;
        return debugShape;
    }

    protected void updateDebugShape() {
        if (debugShape != null) {
            detachDebugShape();
            attachDebugShape();
        }
    }

    protected Spatial getDebugShape() {
        Spatial spatial = DebugShapeFactory.getDebugShape(collisionShape);
        if (spatial == null) {
            return new Node("nullnode");
        }
        if (spatial instanceof Node) {
            List<Spatial> children = ((Node) spatial).getChildren();
            for (Iterator<Spatial> it1 = children.iterator(); it1.hasNext();) {
                Spatial spatial1 = it1.next();
                Geometry geom = ((Geometry) spatial1);
                geom.setMaterial(debugMaterialBlue);
                geom.setCullHint(Spatial.CullHint.Never);
            }
        } else {
            Geometry geom = ((Geometry) spatial);
            geom.setMaterial(debugMaterialBlue);
            geom.setCullHint(Spatial.CullHint.Never);
        }
        spatial.setCullHint(Spatial.CullHint.Never);
        return spatial;
    }

    /**
     * Removes the debug shape
     */
    public void detachDebugShape() {
        debugShape = null;
    }

    /**
     * @return the userObject
     */
    public Object getUserObject() {
        return userObject;
    }

    /**
     * @param userObject the userObject to set
     */
    public void setUserObject(Object userObject) {
        this.userObject = userObject;
    }

    @Override
    public void write(JmeExporter e) throws IOException {
        OutputCapsule capsule = e.getCapsule(this);
        capsule.write(collisionGroup, "collisionGroup", 0x00000001);
        capsule.write(collisionGroupsMask, "collisionGroupsMask", 0x00000001);
        capsule.write(debugShape, "debugShape", null);
        capsule.write(collisionShape, "collisionShape", null);
    }

    @Override
    public void read(JmeImporter e) throws IOException {
        InputCapsule capsule = e.getCapsule(this);
        collisionGroup = capsule.readInt("collisionGroup", 0x00000001);
        collisionGroupsMask = capsule.readInt("collisionGroupsMask", 0x00000001);
        debugShape = (Spatial) capsule.readSavable("debugShape", null);
        CollisionShape shape = (CollisionShape) capsule.readSavable("collisionShape", null);
        collisionShape = shape;
    }
}