[Papervision3D] calculateScreenCoords issue

[wactor]

Hey Andy,

The fact is I am still having problems when resizing the viewport.

Below is a simple flex app that demonstrates the issue. The app contains a
canvas that acts as a container for the Viewport3D. The viewport3D is
adjusted to the canvas when this one is resized.

- The screen coords are correct when the display object location is (0,0,0)
or viewport3D is resized to its creation time size (640x480 in this case).
There is a slight offset otherwise.
- I also tried to use camera.update() function but without any success.

Thanks a lot for any help.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
				layout="vertical"
				creationComplete="onCreationComplete()"
				horizontalAlign="center"
				verticalAlign="middle"
				horizontalScrollPolicy="off"
				verticalScrollPolicy="off"
				>	
	<mx:Script>
		<![CDATA[
			import org.papervision3d.render.BasicRenderEngine;
			import org.papervision3d.cameras.Camera3D;
			import org.papervision3d.view.Viewport3D;
			import org.papervision3d.scenes.Scene3D;
			import org.papervision3d.events.RendererEvent;
			import org.papervision3d.materials.WireframeMaterial;
			import org.papervision3d.materials.ColorMaterial;
			import org.papervision3d.objects.primitives.Plane;
			import org.papervision3d.view.BasicView;
			import mx.events.ResizeEvent;
						
			private var scene:Scene3D;
			private var viewport3D:Viewport3D;
			private var renderer:BasicRenderEngine;
			private var camera:Camera3D
			
			private var plane:Plane;
			private var marker:Sprite;
			
			private function onCreationComplete():void {
				
				createScene3D();				

				marker = createScreenLocationMarker();				
				scene3DCanvas.rawChildren.addChild(marker);
				
				addEventListener(Event.ENTER_FRAME, onEnterFrame);
				addEventListener(ResizeEvent.RESIZE , onAppResized );
			}
			
			private function onAppResized(e:ResizeEvent=null):void {
				
				// recompute canvas proportional size				
				scene3DCanvas.width = this.width * 0.8;
				scene3DCanvas.height = scene3DCanvas.width * 3/4;
												
				// adjust viewport size
				viewport3D.width = scene3DCanvas.width;
				viewport3D.height = scene3DCanvas.height;
				//camera.update(viewport3D.sizeRectangle);			
				
				// reposition marker
				invalidateMarkerLocation();				
			}
			
			private function invalidateMarkerLocation():void {
				marker.x = plane.screen.x + viewport3D.width*0.5;
				marker.y = plane.screen.y + viewport3D.height*0.5; 
				
				viewportSizeLabel.text = int(viewport3D.width) + "x" +
int(viewport3D.height);				
			}
			
			private function createScene3D():void {
				
				scene = new Scene3D();
				viewport3D = new Viewport3D(scene3DCanvas.width, scene3DCanvas.height,
false, false);
				scene3DCanvas.rawChildren.addChild(viewport3D);
				renderer = new BasicRenderEngine();
				camera = new Camera3D();
								
				// basic plane
				plane = new Plane(new WireframeMaterial(0XFF0000) , 500 , 800, 1 , 1);
				plane.autoCalcScreenCoords = true;
				plane.x = 500; 	// <<<< working when 0
				scene.addChild(plane);				
				camera.z = -3000;				
			}	

			private function onEnterFrame(e:Event):void {
				
				renderer.renderScene(scene, camera, viewport3D);	
			}	
								
			private function createScreenLocationMarker():Sprite {
				
				var sprite:Sprite = new Sprite();
				sprite.filters = [new DropShadowFilter(1)];
				with (sprite.graphics) {
					lineStyle(2,0x00FF00);
					moveTo(10,0);lineTo(0,0);lineTo(0,10);moveTo(0,0);lineTo(20,20);
				}
				return sprite;				
			}		
			
		]]>
	</mx:Script>
	
	<mx:HBox horizontalAlign="center" verticalAlign="middle" width="100%"
height="100%" >

		<mx:Canvas id="scene3DCanvas" backgroundColor="#F2DBDB" filters="{[new
DropShadowFilter]}" width="640" height="480">			
			<mx:Label id="viewportSizeLabel" x="10" y="10" text=""/>
		</mx:Canvas>
					
	</mx:HBox>		
	
</mx:Application>





Andy Zupko wrote:
> 
> I haven't had any issues with the screen coords - if the drawing still  
> looks right then it should be fine (it uses the same code as the  
> projection).  Maybe make sure you dont have scale on and are TL aligned.
> 
> 
> On Dec 30, 2008, at 8:28 AM, wactor wrote:
> 
>>
>> Hello,
>>
>> I have a problem with screen coords (autoCalcScreenCoords=true) of a
>> displayObject3D  when the Viewport3D object has been resized  
>> (viewportWidth
>> / viewportHeight). The coordinates are correct when the Viewport3D is
>> initialized but wrong after any change has been applied.
>>
>> note : I am using camera.useProjectionMatrix = false
>>
>> Is there something I am missing here ?
>>
>> thx a lot for any hint.
>> -- 
>> View this message in context:
>> http://www.nabble.com/calculateScreenCoords-issue-tp21217850p21217850.html
>> Sent from the Papervision3D mailing list archive at Nabble.com.
>>
>>
>> _______________________________________________
>> Papervision3D mailing list
>> Papervision3D at osflash.org
>> http://osflash.org/mailman/listinfo/papervision3d_osflash.org
> 
> 
> _______________________________________________
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> 
> 

-- 
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