 		private var _depth				: Number							= 0.;
 		private var _invalidDepth		: Boolean							= false;
 		private var _localToWorld		: Matrix4x4							= null;
-		private var _worldToView		: Matrix4x4							= null;
-		private var _projection			: Matrix4x4							= null;
 		private var _worldToScreen		: Matrix4x4							= null;
 		
 		public function get vertexComponents() : Vector.<VertexComponent>

												 newValue		: Object) : void
		{
			newValue && setParameter(property, newValue);
			
			if (property == 'localToWorld')
			{
				_localToWorld = Matrix4x4.copy(newValue as Matrix4x4, _localToWorld);
				_invalidDepth = true;
			}
			else if (property == 'worldToView')
			{
				_worldToView = Matrix4x4.copy(newValue as Matrix4x4, _worldToView);
				_invalidDepth = true;
			}
			else if (property == 'projection')
			{
				_projection = Matrix4x4.copy(newValue as Matrix4x4, _projection);
				_invalidDepth = true;
			}
			else if (property == 'worldToScreen')
			{
				_worldToScreen = Matrix4x4.copy(newValue as Matrix4x4, _worldToScreen);
				_invalidDepth = true;
			}
		}
		
		public static function sort(drawCalls : Vector.<DrawCall>, numDrawCalls : uint) : void

					setParameter(parameter, meshBindings.getProperty(parameter));
				else if (sceneBindings.propertyExists(parameter))
					setParameter(parameter, sceneBindings.getProperty(parameter));
			}
			
			if (computeDepth)
			{
				sceneBindings.getPropertyChangedSignal('worldToScreen').add(
					transformChangedHandler
				);
				
				meshBindings.getPropertyChangedSignal('localToWorld').add(
					transformChangedHandler
				);
			}
		}

