package {
	import flash.display.Sprite;
	import flash.display.StageAlign;
	import flash.display.StageScaleMode;
	import flash.events.Event;

	import org.papervision3d.cameras.FreeCamera3D;
	import org.papervision3d.lights.PointLight3D;
	import org.papervision3d.materials.ColorMaterial;
	import org.papervision3d.materials.special.ParticleMaterial;
	import org.papervision3d.objects.special.ParticleField;
	import org.papervision3d.render.BasicRenderEngine;
	import org.papervision3d.scenes.Scene3D;
	import org.papervision3d.view.Viewport3D;

	[SWF(backgroundColor="0x000000", width="800", height="600", frameRate="30")]
	public class particles extends Sprite
	{
		private var renderer:BasicRenderEngine
		private var scene:Scene3D;
		private var camera:FreeCamera3D;
		private var viewport:Viewport3D;
		
		// 3d Objects
		private var pointLight:PointLight3D;
		
		public function particles()
		{
			stage.align = StageAlign.TOP_LEFT;
			stage.scaleMode = StageScaleMode.NO_SCALE;

			renderer = new BasicRenderEngine();
			scene = new Scene3D();
			camera = new FreeCamera3D();
			viewport  = new Viewport3D(0, 0, true, false);
			addChild(viewport);

			camera.z = -350;
			camera.focus = 1100;
			camera.zoom = 1;

			pointLight = new PointLight3D(true);
			scene.addChild(pointLight);
			pointLight.moveUp(350);
			pointLight.moveRight(350);

			createParticles();

			stage.addEventListener(Event.ENTER_FRAME, handleEnterFrame);
		}

		private function handleEnterFrame(e:Event):void
		{
			camera.x=camera.y=camera.z=0;
			camera.yaw(.5);
			camera.moveBackward(1000);

			renderer.renderScene(scene, camera, viewport);
		}

		private function createParticles():void
		{
			//Create a new particle material;
			
			var pm:ParticleMaterial = new ParticleMaterial(0xFFFFFF,1);

			//Create a new particlefield.
			var particleField:ParticleField = new ParticleField(pm, 2000, 5000, 5000, 5000);
			scene.addChild(particleField);
		}
	}
}