Fixed IndexArrayOutOfBound that may occur in BatchNode.Also optimized temp array allocation in case there is no tangents buffer

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@8965 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/scene/BatchNode.java

@@ -78,6 +78,8 @@ public class BatchNode extends Node implements Savable {
     private float[] tmpFloat;
     private float[] tmpFloatN;
     private float[] tmpFloatT;
+    int maxVertCount = 0;
+    boolean useTangents = false;
 
     /**
      * Construct a batchNode
@@ -178,7 +180,7 @@ public class BatchNode extends Node implements Savable {
     protected void doBatch() {
         ///List<Geometry> tmpList = new ArrayList<Geometry>();
         Map<Material, List<Geometry>> matMap = new HashMap<Material, List<Geometry>>();
-
+        maxVertCount = 0;
         gatherGeomerties(matMap, this);
         batches.clear();
         int nbGeoms = 0;
@@ -200,6 +202,12 @@ public class BatchNode extends Node implements Savable {
             batch.geometry.getMesh().updateBound();
             batches.put(material, batch);
         }
+        //init temp float arrays
+        tmpFloat = new float[maxVertCount * 3];
+        tmpFloatN = new float[maxVertCount * 3];
+        if (useTangents) {
+            tmpFloatT = new float[maxVertCount * 4];
+        }
         logger.log(Level.INFO, "Batched {0} geometries in {1} batches.", new Object[]{nbGeoms, batches.size()});
     }
 
@@ -352,7 +360,6 @@ public class BatchNode extends Node implements Savable {
         int totalVerts = 0;
         int totalTris = 0;
         int totalLodLevels = 0;
-        int maxVertCount = 0;
 
         Mesh.Mode mode = null;
         for (Geometry geom : geometries) {
@@ -464,6 +471,9 @@ public class BatchNode extends Node implements Savable {
                     FloatBuffer inPos = (FloatBuffer) inBuf.getData();
                     FloatBuffer outPos = (FloatBuffer) outBuf.getData();
                     doCopyBuffer(inPos, globalVertIndex, outPos);
+                    if (VertexBuffer.Type.Tangent.ordinal() == bufType) {
+                        useTangents = true;
+                    }
                 } else {
                     for (int vert = 0; vert < geomVertCount; vert++) {
                         int curGlobalVertIndex = globalVertIndex + vert;
@@ -475,9 +485,6 @@ public class BatchNode extends Node implements Savable {
             globalVertIndex += geomVertCount;
             globalTriIndex += geomTriCount;
         }
-        tmpFloat = new float[maxVertCount * 3];
-        tmpFloatN = new float[maxVertCount * 3];
-        tmpFloatT = new float[maxVertCount * 4];
     }
 
     private void doTransforms(FloatBuffer bufPos, FloatBuffer bufNorm, int start, int end, Matrix4f transform) {
@@ -593,8 +600,6 @@ public class BatchNode extends Node implements Savable {
         bufTangents.put(tmpFloatT, 0, tanLength);
     }
 
-  
-
     private void doCopyBuffer(FloatBuffer inBuf, int offset, FloatBuffer outBuf) {
         TempVars vars = TempVars.get();
         Vector3f pos = vars.vect1;