Update rigid body transformation in Maya and re-measure joint axes

Jeffrey K Spear

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Aug 7, 2025, 5:10:34 PM8/7/25

to XMALab

Hi everyone -- this is a Maya Toolshelf question rather than an XMA Lab question, but I'm hoping someone here might know. Is there a way to re-measure joint movements using existing joint axes?

I have an existing scene with joint axes, but I have now tracked additional trials. Updating the mesh animations is straightforward but I can't figure out how to re-measure the joint axes to generate new data from them. Is this possible? I am using the jAx tool.

Thanks!

Jeff

Beth Brainerd

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Aug 7, 2025, 5:28:56 PM8/7/25

to Jeffrey K Spear, XMALab

I think you should be able to use OuputRelativeMotion — the oRel tool on the MayaTools shelf. Select your two joint axes (the giant locators) as tho proximal and distal elements, not the bones.

-- Beth

> On Aug 7, 2025, at 2:10 PM, Jeffrey K Spear <jks...@nyu.edu> wrote:
>
> Hi everyone -- this is a Maya Toolshelf question rather than an XMA Lab question, but I'm hoping someone here might know. Is there a way to re-measure joint movements using existing joint axes?

Jeffrey K Spear

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Aug 7, 2025, 5:32:29 PM8/7/25

to XMALab, Beth Brainerd, XMALab, Jeffrey K Spear

That was exactly the simple solution I was missing. Thanks so much, Beth!

Best,

Jeff

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