闪光AS3的理解localToGlobal [英] Flash as3 understanding localToGlobal

问题描述

我只是有麻烦了解Flash的localToGlobal一点点功能。我有一个影片剪辑，这是嵌套一大堆其他影片剪辑的内部。当该嵌套剪辑被点击，我想找到自己的位置，并通过一个量，使得嵌套剪辑在阶段（基本上是我拥有的是一个树形图，和我想要的效果的中心移到最上面的含夹是，treeContainer平移，点击的分支为舞台的中心）

I'm just having a little bit of trouble understanding Flash's localToGlobal functionality. I have a movieClip, which is nested inside a whole bunch of other movieclips. When that nested clip is clicked, I want to find its position, and moved the topmost containing clip by an amount such that the nested clip is in the center of the stage (basically what I have is a tree diagram, and the effect I want is that the treeContainer pans to the clicked "branch" as the center of the stage)

所以我有这样的：

var treePoint = new Point (treeContainer.x,treeContainer.y); //since treePoint's parent is the stage, don't need global here.

var groupPoint = new Point (groupClip.x,groupClip.y);
var groupPointGlobal = groupClip.localToGlobal(groupPoint);
var stageCenter = new Point (int(stage.stageWidth/2),int(stage.stageHeight)/2);

var shiftAmount = ???

感谢您的帮助，您可以提供。

Thanks for any help you can provide.

推荐答案

一个剪辑的x，y位置始终是相对于它的父。所以，除非它是舞台上的孩子，或者父母是在0,0 - 您可以使用localToGlobal给你这是在舞台上的位置

A clip's x,y location is always relative to it's parent. So unless it's a child of the stage, or the parent is at 0,0 - you can use localToGlobal to give you it's location on the stage.

var globalPoint:Point = myClip.localToGlobal(new Point(0,0));

这会给你剪辑的全球地位。

That would give you the global position of that clip.

但是从它的声音，你想要去的其他方式，做globalToLocal吧？

But from the sounds of it, you want to go the other way and do globalToLocal right ?

globalToLocal将返回一个局部位置的基础上，全局位置。

globalToLocal will return a local position , based on a global location.

所以，如果你想设置一个剪辑的本地位置，这样它会被放置在屏幕中心 - 让我们假设它是320240

So if you wanted to set a clip's local position so that it will be positioned at center of the screen -- lets assume it's 320,240.

var localPoint:Point = myClip.parent.globalToLocal(new Point(320,240));
myClip.x = localPoint.x;
myClip.y = localPoint.y;

我们使用父，因为那是什么夹子将是相对。

We use the parent, because thats what the clip will be be relative to.

有意义吗？

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