After some extensive research I've come to the conclusion that there's
an issue with using ownCanvas.
Wrote the following snippet to test out different scenarios:
package {
import flash.display.BitmapData;
import flash.filters.BlurFilter;
import flash.system.*;
import flash.display.Sprite;
import flash.events.Event;
import away3d.cameras.Camera3D;
import away3d.containers.View3D;
import away3d.primitives.Sphere;
import away3d.materials.BitmapMaterial;
import com.flashdynamix.utils.SWFProfiler; //http://
www.lostinactionscript.com/blog/index.php/2008/10/06/as3-swf-profiler/
public class MemTest extends Sprite {
private var cam:Camera3D;
private var view:View3D;
private var items:Array = new Array();
private var scenario:int = 0;
/* Scenarios:
0 = [ no material, ownCanvas set to true on creation,
ownCanvas not
set to false before removal, items are removed after 5 items has been
added ] = LEAK!
1 = [ no material, ownCanvas set to true on creation,
ownCanvas set
to false before removal, items are removed after 5 items has been
added ] = NO LEAK
2 = [ bitmapmaterial, ownCanvas set to true on creation,
ownCanvas
set to false before removal, items are removed after 1 item has been
added ] = NO LEAK
3 = [ bitmapmaterial, ownCanvas set to true on creation,
ownCanvas
set to false before removal, items are removed after 5 items has been
added ] = LEAK!
*/
public function MemTest() {
init();
}
private function init( e:Event = null ):void {
if (stage) {
removeEventListener(Event.ADDED_TO_STAGE, init);
cam = new Camera3D( { zoom:5, focus:200 } );
view = new View3D( { camera:cam } );
addChild( view );
SWFProfiler.init(stage, this);
SWFProfiler.show();
addEventListener(Event.ENTER_FRAME,
enterFrameHandler);
} else {
addEventListener(Event.ADDED_TO_STAGE, init);
}
}
private function enterFrameHandler( e:Event ):void {
if (items.length > ((scenario == 2) ? 0 : 5)) {
for each (var sp:Sphere in items) {
view.scene.removeChild( sp );
if (scenario > 0){
sp.ownCanvas = false;
}
sp = null;
}
items = new Array();
System.gc();// It's weird that you need to call
System.gc() for
garbage collection to actually kick in, haven't experienced this
behavior before.
} else {
var obj:Sphere = new Sphere();
if (scenario > 1){
obj.material = new BitmapMaterial(new
BitmapData(100, 100, true,
0xFFFFFFFF * Math.random()));
}
obj.radius = 10;
obj.ownCanvas = true;
obj.filters = [new BlurFilter(10, 10, 1)];
items.push( obj );
view.scene.addChild( obj );
}
view.render();
}
}
}
Has anyone experienced similar issues and maybe found a way around
this ?
Regard,
John
