Rotate a geometry around its axis after translate

Questions
1

Hello, I have a question regarding rotation around object’s center. I have moved an object’s geometry by ‘translate’ and then I want to rotate it around its own axis, not world axis. Could anyone please help me with this matter? and if you suggest to use object.rotateOnAxis( axis, radians ); then how can I find axis passing through the center of the moved(translated) object? Many thanks!

2

That’s a classic. :sunglasses:

To achieve that, you need to:

  1. revert the translation
  2. do the rotation
  3. re-apply the translation
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3

Another solution which may or may not be more appropriate for your use case is to put the object you need to rotate as child of another object such as a Group. Then translate the parent object relative to the world origin and rotate the child object which is relative to its parent.

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