在as3中2秒后制作一个movieclip跟随鼠标

Question

我正在尝试让动画片段 "orb_mc" 在延迟 2 秒后沿着鼠标指针的相同坐标移动，也就是说在球体移动到之前应该有 2 秒的延迟与指针相同的位置。下面是我的代码——除了延迟之外一切正常。

import flash.events.Event;

Mouse.hide();
stage.addEventListener(MouseEvent.MOUSE_MOVE, moveThatMouse);

function moveThatMouse(evt:MouseEvent):void {
    wand.x = stage.mouseX;
    wand.y = stage.mouseY;
    evt.updateAfterEvent();
}

var myTimer:Timer = new Timer(2000);
        var speed:Number=10;

        orb_mc.addEventListener(Event.ENTER_FRAME,follow);
        function follow(e:Event):void{
            myTimer.start();
           orb_mc.x -= (orb_mc.x - mouseX) / speed;
            orb_mc.x = orb_mc.x +2;
           orb_mc.y -= (orb_mc.y - mouseY) / speed;
            orb_mc.y = orb_mc.y +3;

        }

Answer 1

在这种情况下，我不会费心使用计时器。根据您对我评论的回复，我了解到您只是希望 orb_mc 平稳移动到鼠标停止移动的位置。当然，您可以简单地说出 "if mouse isn't moving, send orb to mouse" 的效果，但这样做的问题是您会得到这些不稳定的动作，因为会有这些小时刻鼠标移动没有记录（尤其是当鼠标速度变慢时向下开始向另一个方向移动）。这就是为什么要添加某种延迟。所以我处理这个的方法基本上是让一个计数器在每一帧都上升，并在鼠标移动时重置为 0。

import flash.display.MovieClip;
import flash.events.Event; 
Mouse.hide(); 

var mouseCounter: int = 0;
var mouseDelay: int = 20; // how many frames the mouse must stay still before the follow code is run.    
// var myTimer:Timer = new Timer(2000); won't need this with my method.
var speed:Number=10; 

stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMove);

stage.addEventListener(Event.ENTER_FRAME,follow);

// set counter back to zero whenever the mouse is moved. 
function mouseMove(e:MouseEvent):void
{
    wand.x = stage.mouseX;
    wand.y = stage.mouseY;
    e.updateAfterEvent();
    mouseCounter = 0;
}

function follow(e:Event):void{
    // increment the counter each frame
    mouseCounter++; 

    // now run the follow block if the mouse has been still for enough frames. 
    if (mouseCounter >= mouseDelay)
    {
        //myTimer.start();  won't need this for my method. 
        orb_mc.x -= (orb_mc.x - mouseX) / speed;
        orb_mc.x += 2;
        orb_mc.y -= (orb_mc.y - mouseY) / speed;
        orb_mc.y += 3;
     }
}

在as3中2秒后制作一个movieclip跟随鼠标

Make a movieclip follow mouse after 2 seconds in as3

actionscript-3

flash-cs5