如何改变闪光灯的阶段，ActionScript中的坐标原点？ [英] How to change the coordinate origin in Flash's stage with Actionscript?

问题描述

我觉得我这样做过，但找不到code。

I think I did this before but can't find the code.

Flash作为很多其他图形框架使用的左上角为坐标原点（0,0），因为它是如何底层的内存模型是惯例。

Flash as many other graphical frameworks use the top-left corner as the coordinate origin (0,0) because it's how the underlying memory model is by convention.

不过，这将是非常简单了我的计算，如果原产地是在舞台的中心，因为所有的游戏围绕中心，使用了大量的三角函数，角度等。

But it would be really simpler for my calculations if the origin was in the center of the stage, because all the game revolves around the center and uses a lot of trigonometry, angles, etc.

有一些内置的方法，如舞台:: setOrigin（UINT，UINT）; 或类似的东西？

Is there some built-in method like Stage::setOrigin( uint, uint ); or something like that?

推荐答案

创建一个影片剪辑或者雪碧，并添加（而不是添加到舞台）在stage.width / 2的阶段作为根对象，stage.height / 2。然后，当你，而不是增加您的游戏对象的。添加您的游戏对象，在0,0该剪辑内，他们将在舞台上居中。

Create a MovieClip or Sprite and add that to the stage as your root object (instead of adding to the Stage) at stage.width/2, stage.height/2. Then when you add your game objects to that instead. Add your game objects at 0,0 inside of that clip and they will be centered on the stage.

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