This post was mentioned on Twitter by franto: http://bit.ly/6mLd2r Loosing children interactivity after setting perspectiveProjection #help…

But i’m curious, if this is just hack or this is how it should work, because it’s not very intuitive

http://www.flashandmath.com

Last modified: January 25, 2010.

*/

package {

import flash.display.Sprite;

import flash.events.MouseEvent;

import flash.geom.PerspectiveProjection;

import flash.geom.Point;

public class PPTest extends Sprite {

private var container:Sprite;

private var square:Sprite;

private var pp:PerspectiveProjection;

public function PPTest(){

container=new Sprite();

this.addChild(container);

container.x=400;

container.y=60;

square=new Sprite();

container.addChild(square);

square.x=50;

square.y=50;

drawSquare();

square.addEventListener(MouseEvent.CLICK,squareClicked);

square.rotationY=45;

pp=new PerspectiveProjection();

pp.fieldOfView=80;

pp.projectionCenter=new Point(50,50);

container.transform.perspectiveProjection=pp;

/*
Assigning pp to square instead of container,
as in the next line, makes square lose interactivity.
*/

//square.transform.perspectiveProjection=pp;

/*
Making container a 3D object by uncommenting the
next line obliterates effects of pp.
*/

//container.z=0;

}

private function drawSquare():void {

var color:Number=Math.random()*0xFFFFFF/2;

square.graphics.clear();

square.graphics.beginFill(color);

square.graphics.drawRect(-50,-50,100,100);

square.graphics.endFill();

}

private function squareClicked(e:MouseEvent):void {

drawSquare();

}

}

}

PespectiveProjection behaves counterintuitively in many ways. See for example:
http://www.flashandmath.com/flashcs4/pp/
Today I am working on another post for Flash and Math about quirky behavior of PerspectiveProjection.
Take care, Franto. It is nice to be in touch with you.
Barbara
Barbara Kaskosz´s last blog ..A Dramatic 3D Image Gallery in AS3 Flash Player 10