[转]游戏中纹理的生成

[url]http://game-develop.net/blog/?p=95 [/url]

package
{
    import flash.display.*;
    import flash.filters.*;
    import flash.geom.*;

    /**
     * ...
     * @author sliz http://game-develop.net/blog
     */
    public class Main extends Sprite
    {

        public function Main():void
        {
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;
            var width:uint = 500;
            var height:uint = 500;
            var view:Bitmap = new Bitmap(new BitmapData(width, height));
            for (var i:int = 0; i < view.bitmapData.width;i++ ) {
                for (var j:int = 0; j < view.bitmapData.height; j++ ) {
                    var c1:uint = 0xf19553;
                    var c2:uint = 0xf5984f;
                    var w:Number = 0.2;
                    var a:Number = Math.sin(i / w);
                    view.bitmapData.setPixel(i, j,mix(c1,c2,a));
                }
            }
            addChild(view);
            var map:BitmapData = view.bitmapData.clone();
            map.perlinNoise(10, 100, 1, 1, true, true, 1);
            view.filters = [new DisplacementMapFilter(map, new Point(), BitmapDataChannel.RED, BitmapDataChannel.BLUE, 20, 20, "wrap", 0xff0000)];
        }
        private function mix(x:uint, y:uint, a:Number):uint {
            var r:uint = Math.min(0xff, (x >> 16) * (1 - a) + (y >> 16) * a) << 16;
            var b:uint = Math.min(0xff, (x >> 8 & 0xff) * (1 - a) + (y >> 8 & 0xff) * a) << 8;
            var g:uint = Math.min(0xff, (x & 0xff) * (1 - a) + (y & 0xff) * a);
            return r + b + g;
        }
    }

}