创建粒子拖尾效果

来源：互联网发布：如何修改淘宝评价内容编辑：程序博客网时间：2024/04/27 19:15

import flash.events.Event;import flash.filters.BlurFilter;import flash.filters.GlowFilter;import crawlingtosea.utils.MathUtil;import flash.display.Shape;//@author mengtianwxsvar arr:Array = [];var angle:Number = 0;var radius:Number = 150;var len:int = 0;function p(radius:int,color:uint):Shape{var c:Shape=new Shape();c.graphics.beginFill(color);c.graphics.drawCircle(0,0,radius);c.graphics.endFill();return c;}for (var i:uint=0; i<60; i++){this["p" + i] = p(2,0xff0000);this.addChild(this["p"+i]);arr.push(this["p"+i]);}len = arr.length - 1;for (var j:int=0; j<len; j++){arr[j].filters = [new BlurFilter(2,2,1),new GlowFilter(16711680,.6,2,2,4)];arr[j + 1].alpha = arr[j].alpha - .02;}//排列粒子坐标function queue():void{for (var i:uint =len; i > 0; i--){arr[i].x = arr[i - 1].x;arr[i].y = arr[i - 1].y;}}this.addEventListener(Event.ENTER_FRAME,update);//绕圆形运动function update(e:Event){queue();//arr[0].x = this.mouseX;//arr[0].y = this.mouseY;arr[0].x = Math.cos(MathUtil.r2d(angle)) * radius + 225;arr[0].y = Math.sin(MathUtil.r2d(angle)) * radius + 200;angle +=  0.0004;}

*各种运动效果需要自己调节相应参数实现。