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wrong rotation movement (animation)


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Hello !

 

I wanted to animate my charater's hand moving only the Y axis, but after playing, the bone completed the movement using the X axis too. I've only rotated the Y axis so I don't know why. Can someone help me please ?

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Watch out for which axes really get rotated if you are using the viewport rotation gadget. The gadget is oriented to the child's coordinates while the actual rotation happens in the parent system. Look at the attribute managers rotation values to verify, or have a look at the f-curves where you should see two constant lines for the unused angles. You may think you rotated only one axis (by gadget) when in truth you rotated two. -- Another issue may be if you rotate by more than 180° which can cause funny interpolations; hard to say without a scene.

 

If you need to rotate around several axes, you may want to switch on Quaternion Rotation which uses the shortest path between two points on a (hypothetical) sphere describing the motion. However, the Quaternions come with their own set of issues.

 

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On 8/25/2019 at 7:21 PM, Cairyn said:

Watch out for which axes really get rotated if you are using the viewport rotation gadget. The gadget is oriented to the child's coordinates while the actual rotation happens in the parent system. Look at the attribute managers rotation values to verify, or have a look at the f-curves where you should see two constant lines for the unused angles. You may think you rotated only one axis (by gadget) when in truth you rotated two. -- Another issue may be if you rotate by more than 180° which can cause funny interpolations; hard to say without a scene.

 

If you need to rotate around several axes, you may want to switch on Quaternion Rotation which uses the shortest path between two points on a (hypothetical) sphere describing the motion. However, the Quaternions come with their own set of issues.

 

Thank you for the information ! Yeah it happens due to parenting.

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