forked from: 水面で反射する光、もしくは水底

MouseDownで切り替え。

fillRectとcopyPixelsの組み合わせはカクカクした印象。
drawを使うと重いが良い感じになる。

waterSurfaceもscrollするだけじゃなくてもっと別な方法を使ってみたい。

by cogaram 23 Oct 2011

• Forked from cpu_t's 水面で反射する光、もしくは水底
• Diff: 1
• Related works: 1
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/**
 * Copyright cogaram ( http://wonderfl.net/user/cogaram )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/nVGl
 */

// forked from cpu_t's 水面で反射する光、もしくは水底
// MouseDownで切り替え。
// 
// fillRectとcopyPixelsの組み合わせはカクカクした印象。
// drawを使うと重いが良い感じになる。
// 
// waterSurfaceもscrollするだけじゃなくてもっと別な方法を使ってみたい。
package {
    import flash.display.*;
    import flash.events.*;
    import flash.geom.*;
    import flash.utils.ByteArray;
    [SWF(width = 465, height = 465, backgroundColor = 0x000000, frameRate = 20)]
    public class C extends Sprite {
        private const SIZE:Number = 465;
        private var src:Shape;
        private var bdsrc:BitmapData;
        private var bmpdata:BitmapData;
        private var watersurface:BitmapData;
        
        private var isDraw:Boolean = false;
        
        public function C() {
            src = new Shape();
            src.graphics.beginFill(0xFFFFFF);
            src.graphics.drawCircle(20, 20, 20);
            src.graphics.endFill();
            
            bdsrc = new BitmapData(40, 40, true, 0xFFFFFFFF);
            
            bmpdata = new BitmapData(SIZE, SIZE, true, 0xFF000000);
            watersurface = new BitmapData(SIZE, SIZE, false,0x808080);
            createWatersurface();
            addChild(new Bitmap(bmpdata));
            //addChild(new Bitmap(watersurface));
            addEventListener(Event.ENTER_FRAME, loop);
            stage.addEventListener(MouseEvent.MOUSE_DOWN, function(e:Event):void {
                createWatersurface();
                isDraw = !isDraw;
            } );
        }
        private function createWatersurface():void
        {
            watersurface.perlinNoise(SIZE / 4, SIZE / 4, 2, Math.random() * 0xFFFFFFFF, true, true, 1 | 2);
        }
        private function loop(e:Event):void
        {
            bmpdata.lock();
            bmpdata.fillRect(bmpdata.rect, 0xFF000000);
            var m:Matrix = new Matrix();
            var ct:ColorTransform = new ColorTransform();
            for (var i:int = 0; i < watersurface.height; i+=20) {
                for (var j:int = 0; j < watersurface.width; j += 20) {
                    var col:uint = watersurface.getPixel(j, i);
                    var x:Number = ((col >> 16 & 0xFF) - 128) / 128;
                    var y:Number = ((col >> 8 & 0xFF) - 128) / 128;
                    var d:Number = Math.sqrt(x * x + y * y) / 1.41421356;
                    x = j + x * 80 - bdsrc.width / 2;
                    y = i + y * 80 - bdsrc.height / 2;
                    if (!isDraw) {
                        d = ((0.5 - d) > 0)?(1 - d * 2):0;
                        bdsrc.fillRect(bdsrc.rect, (0xC0 * d*d) * 0x01000000 | 0xFFFFFF);
                        bmpdata.copyPixels(bdsrc, bdsrc.rect,
                            new Point(x, y),
                            null, null, true);
                    }else {
                        d = 1 - d;
                        m.identity();
                        m.scale(d, d);
                        m.translate(x, y);
                        ct.alphaMultiplier = d * .3;
                        bmpdata.draw(src, m, ct, BlendMode.ADD, null, false);
                    }
                }
            }
            bmpdata.unlock();
            bitmapScroll(watersurface, 2, 4);
            //removeEventListener(Event.ENTER_FRAME, loop);
        }
        private function bitmapScroll(bitmapdata:BitmapData, x:int, y:int):void
        {
            var sizeWidth:Number = bitmapdata.rect.width;
            var sizeHeight:Number = bitmapdata.rect.height;
            var w:ByteArray;
            var h:ByteArray;
            if (x >= 0) {
                h = bitmapdata.getPixels(new Rectangle(sizeWidth - x, 0, x, sizeHeight));
            }else {
                h = bitmapdata.getPixels(new Rectangle(0, 0, -x, sizeHeight));
            }
            bitmapdata.scroll(x, 0);
            h.position = 0;
            if (x >= 0) {
                bitmapdata.setPixels(new Rectangle(0, 0, x, sizeHeight), h);
            }else {
                bitmapdata.setPixels(new Rectangle(sizeWidth + x, 0, -x, sizeHeight) , h);
            }
            
            if (y >= 0) {
                w = bitmapdata.getPixels(new Rectangle(0, sizeHeight - y,  sizeWidth, y));
            }else {
                w = bitmapdata.getPixels(new Rectangle(0, 0, sizeWidth, -y));
            }
            bitmapdata.scroll(0, y);
            w.position = 0;
            if (y>= 0) {
                bitmapdata.setPixels(new Rectangle(0, 0, sizeWidth, y), w);
            }else {
                bitmapdata.setPixels(new Rectangle(0, sizeHeight + y, sizeWidth, -y) , w);
            }
        }
    }
}