Away3D Forum Drawing Stage3D to BitmapData while Resizing

I finally found a work-around and would like to share it with you.

The framework i work with uses a render()-function which is also called onResize. So that’s the place where i have to resize the View3D.
If my View3D should be blurred (it’s the case when a Layer is opened by a user) i first change the size of the View3D. Then i lock this function by setting a Boolean to false. on the next frame i redraw the Bitmap that contains a copy of the View3D-Image. And in a third step i redraw the View3D. And this is how it works:

override public function render() : void {
   stage.transform.perspectiveProjection.projectionCenter = new Point(Math.round(_width * 0.5), Math.round(_height * 0.5));
   if (_stage3DView && !_blockStage3DResizing) {
   _stage3DView.width = AppConfig.stageWidth;
   _stage3DView.height = AppConfig.stageHeight;
   if (_isBlurred) {
      _blockStage3DResizing = true;
      addEventListener(Event.ENTER_FRAME, _updateBlurredStage3DBitmap);
      }
   }
}

private function _updateBlurredStage3DBitmap(event : Event) : void {
   _renderStage3DToBitmap();
   removeEventListener(Event.ENTER_FRAME, _updateBlurredStage3DBitmap);
   addEventListener(Event.ENTER_FRAME, _updateStage3D);
}

private function _updateStage3D(event : Event) : void {
   stage3DView.render();
   _blockStage3DResizing = false;
   removeEventListener(Event.ENTER_FRAME, _updateStage3D);
} 

And again, my _renderStage3DToBitmap()-method:

private function _renderStage3DToBitmap() : void {
   if (_stage3DDuplicateBMD) _stage3DDuplicateBMD.dispose();
   _stage3DDuplicateBMD = new BitmapData(AppConfig.stageWidth, AppConfig.stageHeight);
   _stage3DView.renderer.swapBackBuffer = false;
   _stage3DView.render();
   _stage3DView.stage3DProxy.context3D.drawToBitmapData(_stage3DDuplicateBMD);
   _stage3DView.renderer.swapBackBuffer = true;
   _stage3DDuplicateBM.bitmapData = _stage3DDuplicateBMD;
} 

Maybe somebody will need something like this in the future…

Have a nice day!

Drawing Stage3D to BitmapData while Resizing Software: Away3D 4.x

RIPI, Jr. Member Posted: 22 May 2012 09:51 AM Total Posts: 33 Hi! I need to blur the stage3D. As the Blur3D is not very good to animate, i found a Workaround using BitmapData. So, when i need to blur my scene (because a layer pops up and i don’t need the scene to update anymore) i just call a function that draws the content of Stage3D to a BitmapData. That works fine! Now i encountered a problem: When a user resizes the browser window, also the blurred BitmapData should be updated. If it try to resize the View3D and then call my method for drawing the Stage3D to BitmapData again, everything freezes. Can somebody see what i do wrong? Is there a “best practice”? or has somebody another hint for me? here’s my code: //initial blurring: public function blurStage3D() : void { _isBlurred = true; _renderStage3DToBitmap(); } private function _renderStage3DToBitmap() : void { if (_stage3DDuplicateBMD) _stage3DDuplicateBMD.dispose(); _stage3DDuplicateBMD = new BitmapData(AppConfig.stageWidth, AppConfig.stageHeight); _stage3DView.renderer.swapBackBuffer = false; _stage3DView.render(); _stage3DView.stage3DProxy.context3D.drawToBitmapData(_stage3DDuplicateBMD); _stage3DView.renderer.swapBackBuffer = true; _stage3DDuplicateBM.bitmapData = _stage3DDuplicateBMD; _stage3DDuplicateBM.filters = [new BlurFilter(20, 20)]; } //reblurring on resize, BUT THATS NOT WORKING: `if (_stage3DView) { _stage3DView.width = AppConfig.stageWidth; _stage3DView.height = AppConfig.stageHeight; if (_isBlurred){ _renderStage3DToBitmap(); } }` Thank you very much!!
RIPI, Jr. Member Posted: 24 May 2012 09:14 AM Total Posts: 33 [ # 1 ] I finally found a work-around and would like to share it with you. The framework i work with uses a render()-function which is also called onResize. So that’s the place where i have to resize the View3D. If my View3D should be blurred (it’s the case when a Layer is opened by a user) i first change the size of the View3D. Then i lock this function by setting a Boolean to false. on the next frame i redraw the Bitmap that contains a copy of the View3D-Image. And in a third step i redraw the View3D. And this is how it works: override public function render() : void { stage.transform.perspectiveProjection.projectionCenter = new Point(Math.round(_width * 0.5), Math.round(_height * 0.5)); if (_stage3DView && !_blockStage3DResizing) { _stage3DView.width = AppConfig.stageWidth; _stage3DView.height = AppConfig.stageHeight; if (_isBlurred) { _blockStage3DResizing = true; addEventListener(Event.ENTER_FRAME, _updateBlurredStage3DBitmap); } } } private function _updateBlurredStage3DBitmap(event : Event) : void { _renderStage3DToBitmap(); removeEventListener(Event.ENTER_FRAME, _updateBlurredStage3DBitmap); addEventListener(Event.ENTER_FRAME, _updateStage3D); } private function _updateStage3D(event : Event) : void { stage3DView.render(); _blockStage3DResizing = false; removeEventListener(Event.ENTER_FRAME, _updateStage3D); } And again, my _renderStage3DToBitmap()-method: `private function _renderStage3DToBitmap() : void { if (_stage3DDuplicateBMD) _stage3DDuplicateBMD.dispose(); _stage3DDuplicateBMD = new BitmapData(AppConfig.stageWidth, AppConfig.stageHeight); _stage3DView.renderer.swapBackBuffer = false; _stage3DView.render(); _stage3DView.stage3DProxy.context3D.drawToBitmapData(_stage3DDuplicateBMD); _stage3DView.renderer.swapBackBuffer = true; _stage3DDuplicateBM.bitmapData = _stage3DDuplicateBMD; }` Maybe somebody will need something like this in the future… Have a nice day!

Drawing Stage3D to BitmapData while Resizing

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