Fixed how Hardware BoneIndex and BoneWeight buffers are handled in extractVertexData when used for a shared mesh.

All buffers are now properly initialized and data copied over if needed.

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10855 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

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

@@ -1166,19 +1166,20 @@ public class Mesh implements Savable, Cloneable {
         // Now, create the vertex buffers
         SafeArrayList<VertexBuffer> oldVertexData = other.getBufferList();
         for (VertexBuffer oldVb : oldVertexData) {
-            if (oldVb.getBufferType() == VertexBuffer.Type.Index
+            if (oldVb.getBufferType() == VertexBuffer.Type.Index) {
-                    ||oldVb.getBufferType() == VertexBuffer.Type.HWBoneIndex 
-                    || oldVb.getBufferType() == VertexBuffer.Type.HWBoneWeight  ) {
                 // ignore the index buffer
                 continue;
             }
 
+            VertexBuffer newVb = new VertexBuffer(oldVb.getBufferType());
+            newVb.setNormalized(oldVb.isNormalized());
+            //check for data before copying, some buffers are just empty shells 
+            //for caching purpose (HW skinning buffers), and will be filled when
+            //needed
+            if(oldVb.getData()!=null){
                 // Create a new vertex buffer with similar configuration, but
                 // with the capacity of number of unique vertices
                 Buffer buffer = VertexBuffer.createBuffer(oldVb.getFormat(), oldVb.getNumComponents(), newNumVerts);
-
-            VertexBuffer newVb = new VertexBuffer(oldVb.getBufferType());
-            newVb.setNormalized(oldVb.isNormalized());
                 newVb.setupData(oldVb.getUsage(), oldVb.getNumComponents(), oldVb.getFormat(), buffer);
 
                 // Copy the vertex data from the old buffer into the new buffer
@@ -1189,6 +1190,7 @@ public class Mesh implements Savable, Cloneable {
                     // to the new index
                     oldVb.copyElement(oldIndex, newVb, i);
                 }
+            }
             
             // Set the buffer on the mesh
             clearBuffer(newVb.getBufferType());