package net.peternitsch {
	import flash.display.*;
	import flash.events.*;
	import flash.geom.*;
	
	public class PerlinNoiseTest {
		
		public var canvas:Bitmap;
		public var perlinMap:Bitmap;
		public var particleArray:Array = [];
		
		public function PerlinNoiseTest() {
			var perlinData:BitmapData = new BitmapData(400, 400);
			perlinMap = new Bitmap(perlinData);
			
			var canvasData:BitmapData = new BitmapData( 400, 400, false, 0 );
			canvas = new Bitmap( canvasData );
			addChild( canvas );
			
			addEventListener( Event.ENTER_FRAME, handleEnterFrame );
			stage.addEventListener( MouseEvent.MOUSE_DOWN, handleDown );
			stage.addEventListener( MouseEvent.MOUSE_UP, handleUp );
		}
		
		public function draw():void {
			perlinMap.bitmapData.lock();
			perlinMap.bitmapData.perlinNoise(400, 400, 4, 1, false, true, 14, true, [new Point(counter, -counter), new Point(counter*.5, counter*.5)]);
			perlinMap.bitmapData.unlock();
		}	
		
		public var force:Number = 5;
		public function process():void {
			canvas.bitmapData.lock();
			
			var fade:Shape = new Shape();
			fade.graphics.beginFill(0, .05);
			fade.graphics.drawRect(0, 0, 400, 400);
			canvas.bitmapData.draw(fade);
			
			for ( var i:Number = 0; i < particleArray.length; i++ ) {
				var color:uint = perlinMap.bitmapData.getPixel(particleArray[i].x, particleArray[i].y);
				var percent:Number = color / 0xFFFFFF;
				
				var deg:Number = (360 * percent) -90;
				var dx:Number = (force * Math.cos( -deg * Math.PI / 180)) + particleArray[i].x;
				var dy:Number = (force * Math.sin( -deg * Math.PI / 180)) + particleArray[i].y;
				
				var line:Shape = new Shape();
				line.graphics.lineStyle(1, color, .5);
				line.graphics.lineTo(dx, dy);
				canvas.bitmapData.draw( line, new Matrix(1, 0, 0, 1, particleArray[i].x, particleArray[i].y) );
				
				particleArray[i].x = dx;
				particleArray[i].y = dy;
			}
			
			canvas.bitmapData.unlock();
		}
		
		public var counter:int = 1;
		public function handleEnterFrame( e:Event ):void {
			counter = counter + 10;
			draw();
			process();
		}
		
		public function handleDown( e:MouseEvent ):void {
			addEventListener( Event.ENTER_FRAME, handlePressed );
		}
		
		public function handleUp( e:MouseEvent ):void {
			removeEventListener( Event.ENTER_FRAME, handlePressed );
		}
		
		public function handlePressed( e:Event ):void {
			var particle:Point = new Point(stage.mouseX, stage.mouseY); 
			particleArray.push( particle );
		}
		
	}
	
}