that got us going in the right direction. we ended up doing this inside of
resize.
public function handleResize( pEvt:Event ):void {
var scale:Number = ((stage.stageHeight > stage.stageWidth) ?
stage.stageWidth : stage.stageHeight) / BASE_SIZE
holder.scaleX = holder.scaleY = holder.scaleZ = scale
var persp : PerspectiveProjection = new PerspectiveProjection();
persp.focalLength = 480 * scale
persp.projectionCenter = new Point(stage.stageWidth/2,
((stage.stageHeight > stage.stageWidth) ? stage.stageWidth : stage.stageHeight)
/ 2);
holder.transform.perspectiveProjection = persp;
// center it
holder.x = (stage.stageWidth - BASE_SIZE * scale) / 2.0
--- In [email protected], "Kenneth Sutherland"
<kenneth.sutherl...@...> wrote:
>
> It's the perspectiveProjection.
>
> When dealing with any 3D objects in flash 10 you really need to set this
> or it will not behave as you'd expect.
>
>
>
> Add the following line to your startup function
>
> var persp : PerspectiveProjection = new PerspectiveProjection();
>
> persp.projectionCenter = new Point(0, 0 );
>
>
>
> then
>
> face.transform.perspectiveProjection = persp;
>
>
>
>
>
> That will do for your example.
>
>
>
> Kenneth.
>
>
>
> From: [email protected] [mailto:[email protected]] On
> Behalf Of michaeljonknight
> Sent: 04 May 2009 15:09
> To: [email protected]
> Subject: [flexcoders] set camera position for 3d content
>
>
>
>
>
>
>
>
> I am trying to solve a bug that I think is related to the camera
> position for z transforms. I want to resize my frame and keep the z
> positions in tact. However, as we scale the document the z transform
> slides from side to side. I think is because the initial camera position
> is centered in our frame. however, as we resize it the camera stays in
> the same place.
>
> The mxml below shows the problem. The face scales correctly when it is
> on the same z level as the rest of the face. Pressing the space bar
> moves it forward a bit and it no longer scales correctly. Seems like we
> are just missing something.
>
> Thanks in advance for the help.
>
> <?xml version="1.0" encoding="utf-8"?>
> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";
> layout="absolute"
> width="150" height="150" backgroundAlpha="0" addedToStage="startUp();" >
> <mx:Script>
> <![CDATA[
> public var holder:MovieClip
> public var base:MovieClip
> public var face:MovieClip
> public var toggle:Boolean
> private const BASE_SIZE:Number=150
>
> public function startUp():void {
> // add event listener
> stage.addEventListener(Event.RESIZE, handleResize)
> stage.addEventListener(KeyboardEvent.KEY_DOWN, handleKeyPress)
>
> // add the holder
> holder = new MovieClip()
> stage.addChild(holder)
>
> // draw the base
> base = new MovieClip()
> base.graphics.beginFill(0xffffff)
> base.graphics.lineStyle(3, 0x000000)
> base.graphics.drawCircle(0, 0, (BASE_SIZE / 3.0))
> base.graphics.endFill()
> holder.addChild(base)
> base.x = base.y = (BASE_SIZE / 2.0)
>
> // draw the face
> face = new MovieClip()
> face.graphics.beginFill(0x0000ff)
> face.graphics.lineStyle(3, 0x000000)
> face.graphics.drawCircle(-(BASE_SIZE / 8.0), -(BASE_SIZE / 8.0),
> (BASE_SIZE / 12.0))
> face.graphics.endFill()
> face.graphics.beginFill(0x0000ff)
> face.graphics.drawCircle((BASE_SIZE / 8.0), -(BASE_SIZE / 8.0),
> (BASE_SIZE / 12.0))
> face.graphics.endFill()
> face.graphics.lineStyle(6, 0x000000)
> face.graphics.moveTo(-(BASE_SIZE / 8.0), (BASE_SIZE / 12.0))
> face.graphics.curveTo(0, (BASE_SIZE / 4.0), (BASE_SIZE / 8.0),
> (BASE_SIZE / 12.0))
> base.addChild(face)
> toggle = false
> }
>
> public function handleResize( pEvt:Event ):void {
> var scale:Number = ((stage.stageHeight > stage.stageWidth) ?
> stage.stageWidth : stage.stageHeight) / BASE_SIZE
> holder.scaleX = holder.scaleY = holder.scaleZ = scale
>
> // center it
> holder.x = (stage.stageWidth - BASE_SIZE * scale) / 2.0
>
> }
>
> public function handleKeyPress( pEvt:KeyboardEvent ):void {
> if( pEvt.keyCode == 32 ) {
> toggle = !toggle
> face.z = toggle ? -15 : 0
> }
> }
>
> ]]>
> </mx:Script>
> </mx:Application>
>
>
>
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