package {
	import gs.TweenMax;
	import gs.easing.*;
 
	import org.papervision3d.core.geom.renderables.Vertex3D;
	import org.papervision3d.materials.ColorMaterial;
	import org.papervision3d.objects.primitives.Sphere;
	import org.papervision3d.view.BasicView;
 
	[SWF(width="640", height="480", backgroundColor="#000000", frameRate="60")]
	public class Finding2DVertexPoints extends BasicView
	{
		private var sphere:Sphere;
		private var stars:Array = [];
		private var vertices:Array = [];
 
		public function Finding2DVertexPoints()
		{
			sphere = new Sphere(new ColorMaterial(), 300, 15, 15);
			sphere.material.fillAlpha = 0;
			scene.addChild(sphere);
 
			//sphere.geometry.vertices is an array of vertex3D's
			//each vertex3D contains a vertex3DInstance which
			//has the 2d x and y property
			//long-hand sytax: sphere.geometry.vertices[i].vertex3DInstance.x	
			for each(var vertex3D:Vertex3D in sphere.geometry.vertices)
			{
				var dummyStar:star = new star();
				dummyStar.x = Math.random() * this.width;
				dummyStar.y = Math.random() * this.height;
				stars.push(dummyStar);
				this.addChild(dummyStar);
 
				//render once to calculate vertex data
				singleRender(); 
				//push all the sphere's vertices into an array
				vertices.push(vertex3D.vertex3DInstance); 
			}
 
			startTween();
		}
 
		private function startTween():void
		{
			for(var i:int = 0; i<vertices.length; i++)
			{
				var time:Number = 4;
 
				var tweenObject:Object = {};
				tweenObject.yoyo = true;
				tweenObject.ease = Quad.easeInOut;
				//assign the endpoint of the tween to vertices gathered above
				tweenObject.x = vertices[i].x + width/2; 
				tweenObject.y = vertices[i].y + height/2;
				tweenObject.scaleX = tweenObject.scaleY = .2;
				tweenObject.bezierThrough = [{x:Math.random() * width, y:Math.random() * height}];
				tweenObject.orientToBezier = true;
 
				TweenMax.to(stars[i], time, tweenObject);
			}
		}
	}
}