如何在不减少fps的情况下减慢AS3中的动画

Question

我有我在网上找到的代码，它可以无限旋转的图库，现在我的问题是在输入帧时它会跳转并且速度太快。我希望它能够在您将徽标悬停之后尽快完成。

下面是代码：

//Import TweenMax 
import com.greensock.TweenMax; 

//Save the horizontal center 
var centerX:Number = stage.stageWidth/2; 

//Save the width of the whole gallery 
var galleryWidth:Number = infiniteGallery.width; 

//Speed of the movement (calculated by the mouse position in the moveGallery() function) 
var speed:Number = 0; 

//Add an ENTER_FRAME listener for the animation 
addEventListener(Event.ENTER_FRAME, moveGallery); 

function moveGallery(e:Event):void { 

//Calculate the new speed 
speed = -(0.02 * (mouseX - centerX)); 

//Update the x coordinate 
infiniteGallery.x+=speed; 

//Check if we are too far on the right (no more stuff on the left edge) 
if (infiniteGallery.x>0) { 

    //Update the gallery's coordinates 
    infiniteGallery.x= (-galleryWidth/2); 
} 

//Check if we are too far on the left (no more stuff on the right edge) 
if (infiniteGallery.x<(-galleryWidth/2)) { 

    //Update the gallery's coordinates 
    infiniteGallery.x=0; 
} 
} 

和这里是demo »

Answer 1

所述卷轴的速度是基于三两件事：

1-帧速率。 ENTER_FRAME事件处理程序在每一帧被调用，因此直接受帧速率的影响。

2-速度阻尼数。在你的情况下，这等于0.02。如果您想减慢滚动速度，请将其设置为较小的数字。以一半的速度尝试0.01。

3-鼠标指针到舞台中心x坐标的距离。鼠标指针和舞台中心之间的差异乘以你的速度阻尼数。如果你想停止运动，当你在或围绕中心改变你的代码如下：

var buffer:Number = 50; 

function moveGallery(e:Event):void { 
    var diff = mouseX - centerX; 
    if (Math.abs(diff) > buffer) 
     speed = -(0.02 * (diff + (diff > 0 ? -buffer : buffer))); 
    else 
     speed = 0; 

的要求：

var centerX:Number = stage.stageWidth/2; 
var galleryWidth:Number = infiniteGallery.width; 
var speed:Number = 0; 
addEventListener(Event.ENTER_FRAME, moveGallery); 

var buffer:Number = 100; 

function moveGallery(e:Event):void { 
    var diff = mouseX - centerX; 
    if (Math.abs(diff) > buffer) 
     speed = -(0.02 * (diff + (diff > 0 ? -buffer : buffer))); 
    else 
     speed = 0; 

    infiniteGallery.x += speed; 

    if (infiniteGallery.x>0) { 
     infiniteGallery.x = -galleryWidth/2; 
    } 

    if (infiniteGallery.x < -galleryWidth/2) { 
     infiniteGallery.x = 0; 
    } 
}