Transform about axis

ParaView Support
1

I have a 3D model that looks like:

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image633×666 4.42 KB

I am trying to get my model to rotate 180 degrees to look like:

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image638×614 4.18 KB

However when I use the transform filter, my model also translates, even though I only specify rotation 180 in Y.

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image1912×1040 113 KB

How can I rotate about an axis without translation??

2

You are rotating around the origin, not the center of your object. I forget which goes first, but in basic steps, do this?

  • Translate so the origin is in the center of your model.
  • Rotate
  • Translate back where your model originally was.
3

The latest ParaView 5.10 release candidate has a new option to the Transform filter that allows you to rotate around a specified point in space. (See Transform: How to rotate stl about a given axis? - #5 by mwestphal)

3 Likes
4

Oh cool. I had forgotten about that. Thanks Ken.