Flash有趣实验：用视频阻挡泡泡特效

var cam:Camera = Camera.get();
cam.setMode(cam.width, cam.height, 25);
video.attachVideo(cam);
var depth_num:Number = 0;
var list_array:Array;
list_array = new Array();
m = new flash.geom.Matrix();
now = new flash.display.BitmapData(video._width, video._height);
out = new flash.display.BitmapData(video._width, video._height);
this.createEmptyMovieClip("out_mc", 50);
out_mc.attachBitmap(out, 1);
out_mc._x = 160;
this.onEnterFrame = function() {
now.draw(video, m);
done = now.clone();
done.draw(before, m, null, "difference");
done.threshold(done, done.rectangle, done.rectangle.topLeft, ">", 4.279309E+009, 4.294902E+009, 16777215, false);
list_array.push(done.clone());
if (list_array.length>5) {
  list_array.shift().dispose();
}
var r_num9 = list_array.length;
var r_num8 = 255;
var r_num7;
out.fillRect(out.rectangle, 0);
before = now.clone();
for (var c:Number = 0; c<r_num9; c++) {
  r_num7 = c*r_num8;
  out.threshold(list_array[c], out.rectangle, out.rectangle.topLeft, "==", 4.294902E+009, -16777216 | r_num7 << 16 | 0 | 0, 16777215, false);
}
depth_num++;
attachMovie("pao_mc", "pao_mc"+depth_num, depth_num+100, {_x:Math.random()*550, _y:Math.random()*400, _xspeed:3-(Math.random()*6+1), _yspeed:Math.random()*3+1, _scale:Math.random()*20+20});
var color:Color = new Color(this["pao_mc"+depth_num]);
color.setRGB(Math.random()*0xffffff);
this["pao_mc"+depth_num]._xscale = this["pao_mc"+depth_num]._yscale=this["pao_mc"+depth_num]._xscale._scale;
this["pao_mc"+depth_num].onEnterFrame = function() {
  this._xscale += this._scale/60;
  this._yscale = this._xscale;
  this._alpha = 166-this._xscale;
  trace(out.getPixel(this._x, this._y));
  if (out.getPixel(this._x, this._y)<=0) {
   this._x -= this._xspeed;
   this._y -= this._yspeed;
  }
  if (this._x<=0 || this._y<=0 || this._x>=550) {
   this.removeMovieClip();
  }
};
};
stop();