Snow Moebius

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license : MIT License
modified : 2009-08-24 07:33:58

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package {
	
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.events.Event;
	import flash.events.MouseEvent;
	
	import org.papervision3d.cameras.CameraType;
	import org.papervision3d.core.geom.renderables.Particle;
	import org.papervision3d.materials.special.ParticleMaterial;
	import org.papervision3d.objects.special.ParticleField;
	import org.papervision3d.view.BasicView;

[SWF(width="1000", height="600", frameRate="30", backgroundColor="0x000000")]
	public class PV3DFlocking extends BasicView {
		
		private var _field				:ParticleField;
		private var _angle				:Number = 0;
		
		private var _bmp				:Bitmap;
		
		private var _mouseDown			:Boolean = false;
		
		private const VELOCITY			:Number = 10;
		private const MAX_INC_ANGLE		:Number = .02;
		
		public function PV3DFlocking() {
			
			super(0, 0, true, false, CameraType.SPRING);
			
			stage.addEventListener(MouseEvent.MOUSE_DOWN, handleMouseDown);
			stage.addEventListener(MouseEvent.MOUSE_UP, handleMouseUp);
			
			initBitmap();
			init();
			startRendering();
		}
		
		private function initBitmap():void {
			var bmd:BitmapData = new BitmapData(stage.stageWidth, stage.stageHeight, false, 0x000000);
			_bmp = new Bitmap(bmd);
			
			//addChild(_bmp);
		}
		
		private function init():void {
			var mat:ParticleMaterial = new ParticleMaterial(0xffffff, 1, 1);
			_field = new ParticleField(mat, 600);
			scene.addChild(_field);
		}
		
		private function doRender():void {
			
			var particle:Particle;
			var porc:Number = 0;
			var valor:Number = 0;
			
			var r:uint;
			var g:uint;
			var b:uint; 
			
			for(var i:int = 0; i < _field.particles.length; i ++){
				particle = _field.particles[i];
				
				if(particle.x + VELOCITY < 1000){
					particle.x += VELOCITY;
				}else{
					particle.x = -1000;
				}
				
				if(particle.y - VELOCITY > -1000 ){
					particle.y -= VELOCITY;
				}else{
					particle.y = 1000;
				}
				
				r = randRange(0xcc, 0xff);
				g = randRange(0xcc, 0xff);
				b = randRange(0xcc, 0xff);
				
				particle.material.fillColor = r << 16 | g << 8 | b;
				
			}
			
			//	porc = Math.round((mouseX * 200) / stage.stageWidth) - 100;
			//	valor = porc * MAX_INC_ANGLE / 100;
				
				camera.x = Math.sin(_angle) * 500;
				camera.z = Math.cos(_angle) * 500;
				
				camera.fov += Math.sin(_angle) * 1
				
				_angle+=.01;
			
		}
		
		private function handleMouseDown(e:MouseEvent):void {
			_mouseDown = true;
		}
		
		private function handleMouseUp(e:MouseEvent):void {
			_mouseDown = false;
		}
		
		override protected function onRenderTick(event:Event=null):void {
			doRender();
			super.onRenderTick();
		}
		
		private function randRange(start:Number, end:Number) : Number {
			return Math.floor(start +(Math.random() * (end - start)));
		}
	}
}

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