ActionScript 3.0中的阻力，并缓解

我在Flash中创建一个地图，我想有一个类似的平滑移动扔它进入下一个阶段。ActionScript 3.0中的阻力，并缓解

我的代码当前在鼠标释放后会抛出影片剪辑，但鼠标按钮关闭时没有缓动。

有关如何实现此目的的任何提示？

这里是我当前的代码：

// Vars 
var previousPostionX:Number; 
var previousPostionY:Number; 
var throwSpeedX:Number; 
var throwSpeedY:Number; 
var isItDown:Boolean; 

// Event Listeners 
addEventListener(MouseEvent.MOUSE_DOWN, clicked); 
addEventListener(MouseEvent.MOUSE_UP, released); 

// Event Handlers 
function clicked(theEvent:Event) { 
isItDown =true; 
addEventListener(Event.ENTER_FRAME, updateView); 
} 

function released(theEvent:Event) { 
    isItDown =false; 
} 

function updateView(theEvent:Event) { 
    if (isItDown==true){ 
     throwSpeedX = mouseX - previousPostionX; 
     throwSpeedY = mouseY - previousPostionY; 
     mcTestMovieClip.x = mouseX; 
     mcTestMovieClip.y = mouseY; 
    } 
    else{ 
    mcTestMovieClip.x += throwSpeedX; 
    mcTestMovieClip.y += throwSpeedY; 
    throwSpeedX *=0.9; 
    throwSpeedY *=0.9; 
    } 
    previousPostionX= mcTestMovieClip.x; 
    previousPostionY= mcTestMovieClip.y; 
}

来源

2010-05-28 Joe Hamilton