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	flash N个小球碰撞效果制作
flash 多个小球进行碰撞的效果感觉很好玩,当然碰撞的效果也是需要使用 as 代码来完成的,只是觉得好玩,暂时还没想到用在什么地方,新手可以拿 as 代码来测试一下,整个 as 代码如下:
- m._visible = 0;
 - function setMc(m_width,w,h,speed) {
 - stage_w = w-m_width;
 - stage_h = h-m_width;
 - for (i=1; i<11; i++) {
 - M = m.duplicateMovieClip("m"+i, i);
 - M_x = m_width/2+random(stage_w);
 - M_y = m_width/2+random(stage_h);
 - if (i == 1) {
 - M._x = M_x;
 - M._y = M_y;
 - }
 - if (i>1) {
 - for (j=1; j<i; j++) {
 - if (Math.sqrt((this["m"+j]._x-M_x)*(this["m"+j]._x-M_x)+(this["m"+j]._y-M
 - _y)*(this["m"+j]._y-M_y))<m_width) {
 - i--;
 - break;
 - }
 - }
 - if (j == i) {
 - M._x = M_x;
 - M._y = M_y;
 - }
 - }
 - //以上这些是做小球在一定范围内不重合的随机排列
 - M.rotation = random(2*Math.PI);
 - M.xspeed = speed;
 - M.yspeed = speed;
 - //初始每个小球的速度,角度
 - M.onEnterFrame = function() {
 - this._x += this.xspeed*Math.cos(this.rotation);
 - this._y += this.yspeed*Math.sin(this.rotation);
 - //--------------
 - for (i=1; i<11; i++) {
 - if (i == this._name.substr(1, this._name.length)) {
 - continue;
 - } else if (Math.sqrt((this._y-_root["m"+i]._y)*(this._y-_root["m"+i]._y)+(t
 - his._x-_root["m"+i]._x)*(this._x-_root["m"+i]._x))<=m_width) {
 - this.rotation = Math.atan2(this._y-_root["m"+i]._y, this._x-_root["m"+i]._x);
 - this.xspeed = speed;
 - this.yspeed = speed;
 - this._x += this.xspeed*Math.cos(this.rotation);
 - this._y += this.yspeed*Math.sin(this.rotation);
 - break;
 - }
 - //每个小球对场景内的其他所有小球进行接触判断,这里的接触用的是距离判断
 - }
 - //---------------
 - if (this._x<=m_width/2) {
 - this._x = m_width/2+.1;
 - this.xspeed *= -1;
 - } else if (this._x>=300-m_width/2) {
 - this._x = 300-m_width/2-.1;
 - this.xspeed *= -1;
 - } else if (this._y<=m_width/2) {
 - this._y = m_width/2+.1;
 - this.yspeed *= -1;
 - } else if (this._y>=300-m_width/2) {
 - this._y = 300-m_width/2-.1;
 - //这里-.1的处理是为了防止了边界出现问题,你可以删掉这句看看,原因还是自己动脑想
 - this.yspeed *= -1; }
 - };
 - //这里是对小球碰到边界的判断
 - }
 - }
 - setMc(m._width,300,300,5);//参数分别是小球的宽度