as3代码创建火效果代码

as3代码创建火效果代码
下面为.swf文件调用方法

private function update(e:event):void {
target.filters = [new displacementmapfilter(bmd, new point(), bitmapdatachannel.red,bitmapdatachannel.red, 10, strengh, "clamp")];
offset=offset.add(v);
bmd.perlinnoise(size / 2, size, 3, randomseed, false, true, 1, true, [offset, offset]);
}

fireeffect.as

package effects
{
import flash.display.*
import flash.events.event;
import flash.filters.displacementmapfilter;
import flash.geom.*
/**
* ...
* @author sliz
*/
public class fireeffect extends sprite
{
  private var bmd:bitmapdata;
  private var target:sprite = createsharp(400, 30,0);
  private var speed:number = math.random() * 4 + 4;
  private var strengh:number = math.random() * 60 + 60;
  private var size:number = math.random() * 17 + 20;
  private var randomseed:number = math.floor(math.random() * 10);
  private var offset:point = new point();
  private var v:point;
  private var w:number = 50;
  public function fireeffect()
  {
   addchild(target);
   addto(target);
   target.x = 0;
   target.y = 200;
  }
  private function createsharp(width:number,height:number,angle:number):sprite {
   var s:sprite = new sprite();
   s.graphics.beginfill(0, 0);
   s.graphics.drawrect( -w, -w, width + 2 * w, w);
   s.graphics.beginfill(0xffffff);
   s.graphics.drawrect( -w, height, width + 2 * w, w);
   var filltype:string = gradienttype.linear;
   var colors:array = [0x900000, 0x900000,0xff9900,0xfffd8a,0xffffff];
   var alphas:array = [0,1,1,1, 1];
   var ratios:array = [0x00,0xff/16,0xff*2/6,0xff*2/3, 0xff];
   var matr:matrix = new matrix();
   matr.creategradientbox(width, height, math.pi / 2);
   var spreadmethod:string = spreadmethod.pad;
   s.graphics.begingradientfill(filltype, colors, alphas, ratios, matr, spreadmethod);
   s.graphics.drawrect(0, 0, width, height);
   return s;
  }
  public function addto(target:object):void {
   bmd = new bitmapdata(target.width, target.height);
   v = new point(math.random() * (speed / 4) - speed / 8,math.random() * (speed / 4) + speed / 4 * 3);
   target.addeventlistener(event.enter_frame, update);
  }
  private function update(e:event):void {
   target.filters = [new displacementmapfilter(bmd, new point(), bitmapdatachannel.red,bitmapdatachannel.red, 10, strengh, "clamp")];
   offset=offset.add(v);
   bmd.perlinnoise(size / 2, size, 3, randomseed, false, true, 1, true, [offset, offset]);
  }
}

}

main.as

package
{
import flash.display.sprite;
import effects.fireeffect;
import flash.events.mouseevent;
import flash.net.navigatetourl;
import flash.net.urlrequest;
import flash.text.textfield;

/**
* ...
* @author sliz
*/
public class main extends sprite
{
  public function main():void {
   addchild(new fireeffect());
   var lable:textfield = new textfield();
   lable.textcolor = 0xffffff;
   lable.selectable = false;
   lable.text = "sliz";
   lable.addeventlistener(mouseevent.click, function():void { navigatetourl(new urlrequest("http://www.zhutiai.com/")); } );
   addchild(lable);
   lable.x = 370;
   lable.y = 380;
  }
}

}

补充：flash教程,As3.0