Perlin

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license : MIT License
modified : 2009-07-03 10:59:48

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package {
    import flash.display.Sprite;
    import flash.display.BitmapData;
    import flash.display.Bitmap
    import flash.geom.Point;
    import flash.events.Event;
    public class FlashTest extends Sprite {
        private var test:Sprite;
        private var canvas:BitmapData;
        private var random:Number;
        private var redArray:Array 
        private var PointArrayA:Array;
        private var PointArrayB:Array;
        public function FlashTest() {
            // write as3 code here..
            redArray= new Array(256);
            for (var j:int = 0; j < 16; j++) {
                redArray[j * 16] =4.2949e+009
                redArray[j * 16+1] = 4.2949e+009
                redArray[j * 16 + 2] =4.29491e+009
                redArray[j * 16 + 3] = 4.29493e+009
                redArray[j * 16 + 4] = 4.29494e+009
                redArray[j * 16 + 5] = 4.29495e+009
                redArray[j * 16 + 6] = 4.29497e+009
                redArray[j * 16 + 7] = 4.294910e+009
                redArray[j * 16 + 8] = 4.29497e+009
                redArray[j * 16 + 9] = 4.29497e+009
                redArray[j * 16 + 10] = 4.29497e+009
                redArray[j * 16 + 11] = 4.29495e+009
                redArray[j * 16 + 12] = 4.29494e+009
                redArray[j * 16 + 13] = 4.29493e+009
                redArray[j * 16 + 14] = 4.29491e+009
                redArray[j * 16 + 15] = 4.2949e+009;
            }
            test = addChild(new Sprite()) as Sprite;
            PointArrayA = [];
            PointArrayB = [];
                for (var i:int = 0; i < 3; i++ ) {
                    PointArrayA[i] = new Point(Math.random()*stage.stageWidth,Math.random()*stage.stageHeight)
                    PointArrayB[i] = new Point(Math.random() * 10 - 5, Math.random() * 10 - 5);
                }
            canvas = new BitmapData(stage.stageWidth, stage.stageHeight, false, 0x00FF0000);
            test.addChild(new Bitmap(canvas)) as Bitmap;
            addEventListener(Event.ENTER_FRAME, update);
        }
        private function update(e:Event):void {
            random=Math.random()*10000
            var i:int = 0;
            while (i < 3) {
                PointArrayA[i].x = PointArrayA[i].x + PointArrayB[i].x
                PointArrayA[i].y=PointArrayA[i].y+PointArrayB[i].y
                ++i;
            }
	   canvas.perlinNoise(stage.stageWidth, stage.stageHeight,3, random, false, true,1,false,PointArrayA)
            canvas.paletteMap(canvas, canvas.rect, new Point(0, 0),redArray, null, null, null);
        }
    }
}

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