forked from: Light Effect
/**
* Copyright aiaigasa1122 ( http://wonderfl.net/user/aiaigasa1122 )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/b9j8
*/
// forked from yonatan's Light Effect
// forked from http://zozuar.org/las3rfl/node/97
package {
import flash.display.*;
import flash.filters.*;
import flash.geom.*;
import flash.utils.*;
import net.hires.debug.Stats;
[SWF(width="465", height="465", frameRate="60")]
public class LightEffect extends Sprite {
private static const SIZE:int = 465;
private var base:BitmapData = new BitmapData(SIZE, SIZE, false, 0);
private var rot:BitmapData = new BitmapData(SIZE, SIZE, false, 0);
private var canvas:Bitmap = new Bitmap(base);
private var mtx:Matrix = new Matrix;
private var blur:BlurFilter = new BlurFilter;
private var stats:Stats = new Stats;
public function LightEffect() {
graphics.beginFill(0);
graphics.drawRect(0, 0, SIZE, SIZE);
graphics.endFill();
addChild(canvas);
addChild(stats);
stats.visible = false;
var c:uint;
var r:Rectangle = new Rectangle(0, 0, 32, 32);
for(var x:int = 0; x < 5; x++) {
for(var y:int = 0; y < 5; y++) {
c = 1 | x*0x100 | y*0x10000;
r.x = 456/4 + x*50;
r.y = 456/4 + y*50;
base.fillRect(r, c);
}
}
addEventListener("enterFrame", frameHandler);
stage.addEventListener("click", function(e:*):void { stats.visible = !stats.visible });
}
private var dst:BitmapData = new BitmapData(SIZE, SIZE, false, 0);
private function process(src:BitmapData, cx:Number, cy:Number):BitmapData {
var dst:BitmapData = this.dst;
mtx.identity();
mtx.translate(-SIZE * 1/512, -SIZE * 1/512);
mtx.translate(cx, cy);
mtx.scale(257/256, 257/256);
var cnt:int = 8;
var tmp:BitmapData;
src.lock(); dst.lock();
while(cnt--) {
mtx.concat(mtx);
dst.copyPixels(src, src.rect, src.rect.topLeft);
dst.draw(src, mtx, null, "add");
dst.applyFilter(dst, dst.rect, dst.rect.topLeft, blur);
tmp = src;
src = dst;
dst = tmp;
}
src.unlock(); dst.unlock();
return src;
}
private function frameHandler(e:*):void {
mtx.identity();
mtx.translate(-SIZE/2, -SIZE/2);
mtx.rotate(getTimer() / 1000);
mtx.translate(SIZE/2, SIZE/2);
rot.fillRect(rot.rect, 0);
rot.draw(base, mtx);
canvas.bitmapData = process(rot, 0.5 - mouseX/SIZE, 0.5 - mouseY/SIZE);
}
}
}