PerlinNoise

by yun 11 Sep 2010

Embed

/**
 * Copyright yun ( http://wonderfl.net/user/yun )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/wxda
 */

// forked from yun's DisplacementMapFilterのエフェクト
// forked from yun's BlurFilterのエフェクト
// forked from yun's BlendModeの指定
// forked from yun's ColorTransformの指定
// forked from yun's Matrixの指定
// forked from yun's BitmapDataへの描画
package {
    
    import flash.display.Sprite;
    import flash.display.BitmapData;
    import flash.display.Bitmap;
    import flash.display.BitmapDataChannel;
    import flash.geom.Point;
    import flash.events.Event;
    import flash.filters.DisplacementMapFilter;
    
    [SWF(width = 465, height = 465, backgroundColor = 0, frameRate = 30)]
    public class BitmapDataSample extends Sprite {
            
        private var bmpdata:BitmapData;
        private var filter:DisplacementMapFilter;
            
        public function BitmapDataSample() {
            // BitmapDataを作成して表示リストに追加
            bmpdata = new BitmapData(120, 120, false, 0);
            var bmp:Bitmap = new Bitmap(bmpdata);
            bmp.scaleX = bmp.scaleY = 4;
            addChild(bmp);
            // イベント
            addEventListener(Event.ENTER_FRAME, enterframe);
        }
        
        private var baseX:Number = 100;
        private var baseY:Number = 100;
        private var octaves:uint = 10;
        private var randomSeed:int = Math.random() * 0xffffffff;
        private var stitch:Boolean = false;
        private var fractalNoise:Boolean = true;
        private var channelOptions:int = BitmapDataChannel.RED | BitmapDataChannel.GREEN | BitmapDataChannel.BLUE;
        private var glayScale:Boolean = false;
        private var offset:Array = [new Point(), new Point(), new Point()]
        
        private function enterframe(e:Event):void {
            // PerlinNoise
            bmpdata.perlinNoise(baseX, baseY, octaves, randomSeed, stitch, fractalNoise, channelOptions, glayScale, offset)
            offset[0].y += 2;
            offset[1].y += 1;
            offset[2].y += 0.5;
        }
    }
}