In case you don't want to use mouseEvents, I'm sending the code thatt I used based on Rob's help.
var rayToMouse:Number3D = new Number3D(this.view.mouseX
/
this.perspective, this.view.mouseY / this.perspective,
this.distanceToObjectCenter);
rayToMouse.transform(rayToMouse,
this.camera.invViewMatrix);
rayToMouse.sub(rayToMouse, this.camera.position);
rayToMouse.normalize();
Hope it helps you.
Felipe
