Flash实现人物在界面上行走

//全局变量
var speed:Number = 25; //移动速度 单位：px/s
var speed2:Number = 100; //循环间隔  单位：ms
var time:Number; //总时间
var time2:Number = 0; //计时器
var Lx:Number,Ly:Number; //单位时间位移
var Intervalid:Number;
var x1:Number = girl._x; //初始X坐标为人物X坐标
var y1:Number = girl._y; //初始Y坐标为人物Y坐标
var x2:Number,y2:Number; //终点X、Y坐标

btn1._width = Stage.width; //按钮宽为屏幕宽
btn1._height = Stage.height; //按钮高为屏幕高

//函数：计算Lx,Ly
function returnLxLy(){
	var L:Number; //两点间路程
	x2 = _root._xmouse;
	y2 = _root._ymouse;
	//Math.sqrt(Math.pow(Math.abs(3-7),2))
	L = Math.sqrt(Math.pow(Math.abs(x2)-Math.abs(x1),2) + Math.pow(Math.abs(y2)-Math.abs(y1),2));
	time = L / speed;
	Lx = ((x2-x1)*speed*speed2)/(L*1000);
	Ly = ((y2-y1)*speed*speed2)/(L*1000);	
}

//函数：移动人物
function moveto(){
	time2 = time2 + speed2/1000;
	if(time2>time){clearInterval(Intervalid);}
	x1 = x1 + Lx;
	y1 = y1 + Ly;
	girl._x = x1;
	girl._y = y1;
	text1.text = "坐标：" + Math.round(x1) + ":"+ Math.round(y1);
}

on (release) {
	time2 = 0;
	clearInterval(Intervalid);
	returnLxLy();
	Intervalid = setInterval(this, "moveto", speed2);
}