Three.js将一个对象添加到一个组中，但保持全局位置/旋转/缩放

I want to move an object from one group (or world/scene) to another group, but keep it's global transformation intact. Basically, I don't want to see the object change.

我想将一个对象从一个组（或世界/场景）移动到另一个组，但保持它的全局转换完好无损。基本上，我不希望看到对象发生变化。

basically, something like this:

基本上，这样的事情：

//store current world transformation
var origWorldMatrix = myObject.matrixWorld.clone();

//move object to a group (that is positioned and rotated arbitrarily)
someGroup.add( myObject );

//restore previous world transformation
myObject.matrixWorld.copy( origWorldMatrix );

However, this doesn't seem to work. I guess because the world matrix is always updated the next frame, based on the local position/rotation/scale properties. I've tried to use this with matrixAutoUpdate = false, but that doesn't seem to work either.

但是，这似乎不起作用。我想因为世界矩阵总是在下一帧更新，基于本地位置/旋转/缩放属性。我已经尝试使用matrixAutoUpdate = false，但这似乎也不起作用。

The result I am trying to accomplish seems like something that should be simple to do, so I hope I am missing something obvious. Can anybody give me a clue on how do do this?

我试图完成的结果似乎应该很简单，所以我希望我遗漏了一些明显的东西。谁能给我一个如何做到这一点的线索？

Thanks!

谢谢！

1 个解决方案

#1

As I mentioned in my comment, the methods you need to utilize are:

正如我在评论中提到的，您需要使用的方法是：

// remove child from parent and add it to scene
THREE.SceneUtils.detach( child, parent, scene );

// remove child from scene and add it to parent
THREE.SceneUtils.attach( child, scene, parent );

Study the source code of attach() and detach() so you understand what they are doing.

研究attach（）和detach（）的源代码，以便了解它们正在做什么。

three.js r.74

#1