Fixed a lot of bugs with render surfaces and bitmaps.

samples/o3d-webgl/shape.js

 /*
  * Copyright 2010, Google Inc.
  * 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.
@@ skipping 76 matching lines @@
 o3d.Shape.prototype.addElement = function(element) {
   this.elements.push(element);
 };
 
 
 /**
  * Removes and element to the list of elements for this shape.
  * @param {o3d.Element} element The element to add.
  */
 o3d.Shape.prototype.removeElement = function(element) {
-  
+  o3d.removeFromArray(this.elements, element);
 };
 
 
 /**
  * Called when the tree traversal finds this shape in the transform tree.
  * Adds objects to the given drawlists if the drawlist of the material matches.
  * @param {Array.<Object>} drawListInfos A list of objects containing
  *     drawlists and matrix info.
  * @param {o3d.math.Matrix4} world The world matrix.
  */
 o3d.Shape.prototype.writeToDrawLists =
     function(drawListInfos, world, transform) {
   var elements = this.elements;
+
+  // Iterate through elements of this shape.
   for (var i = 0; i < elements.length; ++i) {
     var element = elements[i];
+
+    // For each element look at the DrawElements for that element.
     for (var j = 0; j < element.drawElements.length; ++j) {
       var drawElement = element.drawElements[j];
-      var materialDrawList = drawElement.material.drawList;
+      var material = drawElement.material || drawElement.owner.material;
+      var materialDrawList = material.drawList;
+
+      // Iterate through the drawlists we might write to.
       for (var k = 0; k < drawListInfos.length; ++k) {
         var drawListInfo = drawListInfos[k];
         var list = drawListInfo.list;
         var context = drawListInfo.context;
+
+        // If any of those drawlists matches the material on the drawElement,
+        // add the drawElement to the list.
         if (materialDrawList == list) {
           list.list_.push({
             view: context.view,
             projection: context.projection,
             world: world,
             transform: transform,
             drawElement: drawElement
           });
         }
       }
     }
   }
 };
+
+