* Remove use of instance variable in BIHTree, instead use TempVars

jme3-core/src/main/java/com/jme3/collision/bih/BIHTree.java

@@ -68,7 +68,7 @@ public class BIHTree implements CollisionData {
     private float[] pointData;
     private int[] triIndices;
     
-    private transient CollisionResults boundResults = new CollisionResults();
+    // private transient CollisionResults boundResults = new CollisionResults();
     private transient float[] bihSwapTmp;
     
     private static final TriangleAxisComparator[] comparators = new TriangleAxisComparator[]
@@ -398,6 +398,9 @@ public class BIHTree implements CollisionData {
             BoundingVolume worldBound,
             CollisionResults results) {
 
+        TempVars vars = TempVars.get();
+        try {
+            CollisionResults boundResults = vars.collisionResults;
             boundResults.clear();
             worldBound.collideWith(r, boundResults);
             if (boundResults.size() > 0) {
@@ -425,6 +428,9 @@ public class BIHTree implements CollisionData {
                 return root.intersectWhere(r, worldMatrix, this, tMin, tMax, results);
             }
             return 0;
+        } finally {
+            vars.release();
+        }
     }
 
     private int collideWithBoundingVolume(BoundingVolume bv,

jme3-core/src/main/java/com/jme3/util/TempVars.java

@@ -33,6 +33,7 @@ package com.jme3.util;
 
 import com.jme3.bounding.BoundingBox;
 import com.jme3.bounding.BoundingVolume;
+import com.jme3.collision.CollisionResults;
 import com.jme3.collision.bih.BIHNode.BIHStackData;
 import com.jme3.math.*;
 import com.jme3.scene.Spatial;
@@ -222,6 +223,7 @@ public class TempVars {
     /**
      * BIHTree
      */
+    public final CollisionResults collisionResults = new CollisionResults();
     public final float[] bihSwapTmp = new float[9];
     public final ArrayList<BIHStackData> bihStack = new ArrayList<BIHStackData>();
 }