Actionscript 3 AS3放大和缩小鼠标单击的位置不在注册位置

我试图有一个蒙面鼠标平移图像放大和缩小与点击和双击鼠标事件。我得到了要缩放的图像，但它总是在左边缘注册点放大，而不是在我单击的位置。我完全不知道如何编写代码，花了一整天的时间在互联网上试图找到答案，但运气不好。我希望有人能帮我解决这个问题

import com.greensock.*;//Greensock Tweening Platform.

//Variables
var percX:Number;
var percY:Number;
var destX:Number;
var destY:Number;

//Image panned and masked
this.mask = mask_mc;
stage.addEventListener(MouseEvent.MOUSE_MOVE,mousemove);
function mousemove(e:MouseEvent) {
    if (mask_mc.hitTestPoint(stage.mouseX,stage.mouseY,false)) {
        if (imgLoader.width>mask_mc.width) {//Avoids Scrolling if image is under mask area width
            percX = mask_mc.mouseX/mask_mc.width;
        }
        if (imgLoader.height>mask_mc.height) {//Avoids Scrolling if image is under mask area height
            percY = mask_mc.mouseY/mask_mc.height;
        }
        destX = -(imgLoader.width-mask_mc.width)*percX;
        destY = -(imgLoader.height-mask_mc.height)*percY;
        TweenMax.to(imgLoader,.5,{x:destX,y:destY});
    }
}
//Add listeners for the imgLoader movie clip.
imgLoader.doubleClickEnabled = true;  
imgLoader.addEventListener(MouseEvent.CLICK, increaseSize);
imgLoader.addEventListener(MouseEvent.DOUBLE_CLICK, decreaseSize);

//This function increases the scale of the image
function increaseSize(event:MouseEvent):void{
TweenLite.to(imgLoader, 1, {scaleX:2, scaleY:2});
}

//This function decreases the scale of the image
function decreaseSize(event:MouseEvent):void{
TweenLite.to(imgLoader, 1, {scaleX:1, scaleY:1});
}

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这个答案来自于

添加此功能：

function scaleAroundMouse(objectToScale:DisplayObject, scaleAmount:Number, bounds:Rectangle = null, onComplete:Function = null):TweenLite {
    // scaling will be done relatively
    var relScaleX:Number = scaleAmount / objectToScale.scaleX;
    var relScaleY:Number = scaleAmount / objectToScale.scaleY;
    // map vector to centre point within parent scope

    var scalePoint:Point = objectToScale.localToGlobal( new Point(objectToScale.mouseX, objectToScale.mouseY));
    scalePoint = objectToScale.parent.globalToLocal( scalePoint );
    // current registered postion AB
    var AB:Point = new Point( objectToScale.x, objectToScale.y );
    // CB = AB - scalePoint, objectToScale vector that will scale as it runs from the centre
    var CB:Point = AB.subtract( scalePoint );
    CB.x *= relScaleX;
    CB.y *= relScaleY;
    // recaulate AB, objectToScale will be the adjusted position for the clip
    AB = scalePoint.add( CB );
    // set actual properties

    if(bounds){
     var limits:Rectangle = new Rectangle(
        bounds.x + (bounds.width - (objectToScale.width * relScaleX)),
        bounds.y + (bounds.height - (objectToScale.height * relScaleY)),
        (objectToScale.width * relScaleX) - bounds.width,
        (objectToScale.height * relScaleY) - bounds.height
     );

     if(AB.x < limits.x) AB.x = limits.x;
     if(AB.x > limits.x + limits.width) AB.x = limits.x + limits.width;
     if(AB.y < limits.y) AB.y = limits.y;
     if(AB.y > limits.y + limits.height) AB.y = limits.y + limits.height;       
    }

    return TweenLite.to(objectToScale,1,{onComplete: onComplete, scaleX: scaleAmount, scaleY: scaleAmount, x: AB.x, y: AB.y);
}

scaleAroundMouse(imgLoader, 1, myMask.getBounds(this));

我还向函数添加了一个bounds参数。如果您永远不希望内容的边缘在遮罩内可见，这将非常有用。因此，如果您可以通过将掩码的边界传递给函数来使用它：

function scaleAroundMouse(objectToScale:DisplayObject, scaleAmount:Number, bounds:Rectangle = null, onComplete:Function = null):TweenLite {
    // scaling will be done relatively
    var relScaleX:Number = scaleAmount / objectToScale.scaleX;
    var relScaleY:Number = scaleAmount / objectToScale.scaleY;
    // map vector to centre point within parent scope

    var scalePoint:Point = objectToScale.localToGlobal( new Point(objectToScale.mouseX, objectToScale.mouseY));
    scalePoint = objectToScale.parent.globalToLocal( scalePoint );
    // current registered postion AB
    var AB:Point = new Point( objectToScale.x, objectToScale.y );
    // CB = AB - scalePoint, objectToScale vector that will scale as it runs from the centre
    var CB:Point = AB.subtract( scalePoint );
    CB.x *= relScaleX;
    CB.y *= relScaleY;
    // recaulate AB, objectToScale will be the adjusted position for the clip
    AB = scalePoint.add( CB );
    // set actual properties

    if(bounds){
     var limits:Rectangle = new Rectangle(
        bounds.x + (bounds.width - (objectToScale.width * relScaleX)),
        bounds.y + (bounds.height - (objectToScale.height * relScaleY)),
        (objectToScale.width * relScaleX) - bounds.width,
        (objectToScale.height * relScaleY) - bounds.height
     );

     if(AB.x < limits.x) AB.x = limits.x;
     if(AB.x > limits.x + limits.width) AB.x = limits.x + limits.width;
     if(AB.y < limits.y) AB.y = limits.y;
     if(AB.y > limits.y + limits.height) AB.y = limits.y + limits.height;       
    }

    return TweenLite.to(objectToScale,1,{onComplete: onComplete, scaleX: scaleAmount, scaleY: scaleAmount, x: AB.x, y: AB.y);
}

scaleAroundMouse(imgLoader, 1, myMask.getBounds(this));

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此示例使用缩放效果类，这些类可能有助于实现所需的缩放效果

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这是我一个月前发布的一个问题。你可以看到。虽然我最终没有使用那个特定的片段（实际上我使用的是LondongDruges\u MediaServ posted脚本的修改版本），但它会起作用，并且更易于理解和实现。

您需要先转换比例，然后再转换，所以您可以将用户单击的点向上移动到左侧，直到它“落地”在注册点，然后缩放，然后向后滑动（全部不在视野内）。请参阅此处的更多详细信息：