html5 canvas鸟群飞来飞去动画特效.zip

代码片段：  varsolveBirdMove=function(bird)   {     ['x','y','z'].forEach(function(key){       if(Math.abs(bird.move[key])>0.003){         bird.move[key]*=0.99;       }     });     if(frame%bird.ownMove.t===0){       bird.ownMove.x