package
{
	import flash.events.Event;
 
	import gs.TweenMax;
	import gs.easing.Cubic;
 
	import org.papervision3d.core.proto.MaterialObject3D;
	import org.papervision3d.events.InteractiveScene3DEvent;
	import org.papervision3d.lights.PointLight3D;
	import org.papervision3d.materials.shadematerials.FlatShadeMaterial;
	import org.papervision3d.materials.shadematerials.GouraudMaterial;
	import org.papervision3d.objects.DisplayObject3D;
	import org.papervision3d.objects.primitives.Sphere;
	import org.papervision3d.view.BasicView;
	import org.pv3d.objects.Arrow;
 
	[SWF(width="640", height="480", backgroundColor="#000000", frameRate="60")]
	public class TweeningLookAt extends BasicView
	{
 
		private var arrow:Arrow;
		private var light:PointLight3D;
		private var lookAtMe:DisplayObject3D;
		private var lookAtTarget:DisplayObject3D;
 
		public function TweeningLookAt()
		{
			viewport.interactive = true;
 
			light = new PointLight3D();
 
			var material:MaterialObject3D;
			material = new GouraudMaterial(light, 0xdddddd, 0xcc0000, 10);
 
			arrow = new Arrow(material);
			arrow.scale = .5;
			scene.addChild(arrow);	
 
			for(var i:int = 0; i < 20; i++)
			{
				var randomColor:Number = Math.random() * 0x555555;
				var lightColor:Number = 0xdddddd;
				material = new FlatShadeMaterial(light, lightColor, randomColor, 10);
				material.interactive = true;
 
				var sphere:Sphere = new Sphere(material, 200, 6, 6);
				sphere.x = Math.random() * 4000 - 2000;				
				sphere.y = Math.random() * 4000 - 2000;				
				sphere.z = Math.random() * 2000 + 300;				
 
				scene.addChild(sphere);
 
				sphere.addEventListener(InteractiveScene3DEvent.OBJECT_CLICK, sphere_objectClickHandler);
 
				sphere.lookAt(arrow);
			}
 
			lookAtMe = new DisplayObject3D();
			lookAtMe.z = 1000;
			lookAtTarget = new DisplayObject3D();
 
			camera.target = lookAtMe;
 
			scene.addChild(lookAtMe);
 
			startRendering();	
		}
 
		private function sphere_objectClickHandler(event:InteractiveScene3DEvent):void
		{	
			lookAtTarget.copyTransform(event.displayObject3D);
			lookAtTarget.moveForward(500);
 
			var time:Number = 1;
			var tweenObject:Object = {};
			tweenObject.x = lookAtTarget.x;
			tweenObject.y = lookAtTarget.y;
			tweenObject.z = lookAtTarget.z;
			tweenObject.ease = Cubic.easeInOut;
			TweenMax.to(lookAtMe, time, tweenObject);	
		}
 
		override protected function onRenderTick(event:Event=null):void
		{
			light.x = lookAtMe.x;
			light.y = lookAtMe.y;
			light.z = lookAtMe.z;
			arrow.lookAt(lookAtMe);
			super.onRenderTick(event);
		}
	}
}