用FlashCS3的AS制作跟随鼠标弹性小游戏，主要是练习AS的使用。源文件下载：弹性小球运动.rar
修改文档属性。
首先建立4个小的电影剪辑元件，分别设置如下：
回到主场景中加入如下代码：
attachMovie("newmouse","newmouse",_root.getNextHighestDepth());
attachMovie("circle","circle",_root.getNextHighestDepth(),{_x:250,_y:200});
attachMovie("crosshair","crosshair",_root.getNextHighestDepth());
attachMovie("ball","ball",_root.getNextHighestDepth());
Mouse.hide();
friction=0.9;
speed_scale=0.1;
xspeed=0;
yspeed=0;
newmouse.onEnterFrame=function(){
this._x=_root._xmouse;
this._y=_root._ymouse;
};
crosshair.onEnterFrame=function(){
this._x=_root._xmouse;
this._y=_root._ymouse;
dist_x=this._x-circle._x;
dist_y=this._y-circle._y;
distance=Math.sqrt(dist_x*dist_x+dist_y*dist_y);
if(distance>45){
angle=Math.atan2(dist_y,dist_x);
this._x=250+45*Math.cos(angle);
this._y=200+45*Math.sin(angle);
}
};
ball.onEnterFrame=function(){
dist_x=(crosshair._x-this._x)*speed_scale;
dist_y=(crosshair._y-this._y)*speed_scale;
xspeed+=dist_x;
yspeed+=dist_y;
xspeed*=friction;
yspeed*=friction;
this._x+=xspeed;
this._y+=yspeed;
};
按Ctrl+Enter测试影片吧！
