使物体直接向某一点移动，并在到达该点时停止

public function onMouseDown(evt:MouseEvent)
    {
        if (this._character != null)
        {
            _character.isMoving = false;
            _character.dx = 0;
            _character.dy = 0;
            targetX = mouseX - _character.x;
            targetY = mouseY - _character.y;
            var angle:Number = Math.atan2(targetY,targetX);
            var dx:Number = Math.cos(angle) * _character.speed;
            var dy:Number = Math.sin(angle) * _character.speed;
            _character.dx = dx;
            _character.dy = dy;
            _character.isMoving = true;
        }
    }
    public function updateCharacter(e:Event):void
    {
        if (this._character.isMoving)
        {
            this._character.x +=  this._character.dx;
            this._character.y +=  this._character.dy;
        }
    }

最简单的方法是计算每次移动时要停止的点的角度。如果你在直线上移动，直到你经过你试图停下来的点，这个值应该保持不变，在这个点上它会发生巨大的变化。

一旦发生这种情况，只需将对象移回它应该停止的位置，然后再进行渲染。

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我为您创建了一个带有源代码的演示。有相当多的代码，所以你可以下载源代码，而不是在这里发布所有内容：

http://martywallace.com/testing/gotoPoint.zip

试试这个

package 
{
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.events.MouseEvent;
    public class Guest extends MovieClip
    {
        var walkSpeed:Number = 5;
        var oldPosX;
        var oldPosY;
        public function Guest()
        {
            stage.addEventListener(MouseEvent.CLICK, walk);
        }
        function walk(event:MouseEvent):void
        {
            oldPosX = parent.mouseX;
            oldPosY = parent.mouseY;
            rotation = Math.atan2(oldPosY - y,oldPosX - x) / Math.PI * 180;
            addEventListener(Event.ENTER_FRAME, loop);
        }
        function loop(event:Event):void
        {
            // see if you're near the target
            var dx:Number = oldPosX - x;
            var dy:Number = oldPosY - y;
            var distance:Number = Math.sqrt((dx*dx)+(dy*dy));
            if (distance<walkSpeed)
            {
                // if you are near the target, snap to it
                x = oldPosX;
                y = oldPosY;
                removeEventListener(Event.ENTER_FRAME, loop);
            }
            else
            {
                x = x+Math.cos(rotation/180*Math.PI)*walkSpeed;
                y = y+Math.sin(rotation/180*Math.PI)*walkSpeed;
            }
        }
    }
}