PerlinNoiseEffect for PV3D

写了个PerlinNoiseEffect类，但效率很差，对于较大的bitmapData运行起来会比较累。

Code:

scene.addChild(dae);

var bfx:BitmapEffectLayer = new BitmapEffectLayer(viewport, viewportWidth, viewportHeight, true, 0, BitmapClearMode.CLEAR_PRE, false, false);

viewport.containerSprite.addLayer(bfx);

bfx.addDisplayObject3D(dae, true);

bfx.blendMode = BlendMode.ADD;

var perlinNoise_bmd:BitmapData = new BitmapData(bfx.width, bfx.height);

bfx.addEffect(new PerlinNoiseEffect(perlinNoise_bmd, new DisplacementMapFilter(perlinNoise_bmd, new Point(), 1, 1, 2, 3, DisplacementMapFilterMode.COLOR), 10, 15, 1));

bfx.addEffect(new BitmapColorEffect(1, .9, .85, .95));

Download:PerlinNoiseEffect.as

Preview:http://niuniuzhu.cn/p/PerlinNoise/