html5 canvas圆形粒子移动背景动画特效.zip

this.update=function(){ varlastPoint={x:_this.x,y:_this.y}; //Movepointsovertime _this.radians=_this.velocity; //Drageffect _this.lastMouse.x=(mouse.x-_this.lastMouse.x)*0.05; _this.lastMouse.y=(mouse.y-_this.lastMouse.y)*0.05; //CircularMotion _this.