[Papervision3D] DAE Memory Leak

[Ryan Kee]

Hey everyone. I'm having an issue with a memory leak when dealing with  
DAEs. At first I thought it was the same problem that older builds of  
PV3D had with dictionary objects not using weak references (Seb fixed  
those a few months ago:http://www.sebleedelisle.com/?p=309), but after  
running side by side tests of adding and deleting primitives and DAEs,  
the memory creep was only present with DAE files.

For my current application I have the need to load and unload several  
DAE models and apply the same texture to all of them. In theory,  
something like this should work:
Code:

import org.papervision3d.materials.ColorMaterial;
import org.papervision3d.materials.utils.MaterialsList;
import org.papervision3d.objects.parsers.DAE;
import org.papervision3d.view.Viewport3D;
import org.papervision3d.render.BasicRenderEngine;
import org.papervision3d.cameras.Camera3D;
import org.papervision3d.scenes.Scene3D;
import org.papervision3d.events.FileLoadEvent;
import org.papervision3d.view.stats.StatsView;

public var SCENE:Scene3D = new Scene3D();
public var CAMERA:Camera3D = new Camera3D();
public var RENDERER:BasicRenderEngine = new BasicRenderEngine();
public var VIEWPORT:Viewport3D = new Viewport3D(640,480);
public var COLLADA:DAE;
public var MATERIALS:MaterialsList = new MaterialsList();
public var COLOR_MAT:ColorMaterial = new ColorMaterial();

public function init():void
{
	//add the viewport to the stage
	stage.addChild(VIEWPORT);
	//set up material list
	MATERIALS.addMaterial(COLOR_MAT, 'TextureName');
	//create collada
	loadCollada();
	//set up mouse event to unload the current dae and load another
	stage.addEventListener(MouseEvent.CLICK, unloadCollada);
}

public function loadCollada():void
{
	COLLADA = new DAE();
	COLLADA.load('dae/yourFileName.dae', MATERIALS);
	COLLADA.addEventListener(FileLoadEvent.LOAD_COMPLETE, daeLoaded);
	COLLADA.scale = 3500;
}

public function unloadCollada(e:MouseEvent):void
{
	//remove the collada from the scene and set everything to null
	SCENE.removeChild(COLLADA);
	COLLADA.geometry = null;
	COLLADA.materials = null;
	COLLADA.document = null;
	COLLADA = null;
	//load the collada again
	loadCollada();
}

public function daeLoaded(e:FileLoadEvent):void
{
	//remove event listener
	COLLADA.removeEventListener(FileLoadEvent.LOAD_COMPLETE, daeLoaded);
	//add collada to the scene
	SCENE.addChild(COLLADA);
	//set up and start render timer
	var TIMER:Timer = new Timer(20);
	TIMER.addEventListener(TimerEvent.TIMER, renderScene);
	TIMER.start();
}			

public function renderScene(e:TimerEvent):void
{
	RENDERER.renderScene(SCENE, CAMERA, VIEWPORT);
}


If you were to compile this, you'd see that the memory keeps building  
every time you click the stage. If I replaced the DAE with a Cube,  
there isn't any memory leak. Any ideas?

Ryan


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