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Forum Index - Animation - Local rotation animation issues

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-toe_fungi
Junior Member
toe_fungi

1 year ago
hey there i've been working on animation recently and have turned to 'local' rotation for the correct rotation of a set of windmill blades. i need the blades to rotate upon the axle straightly, with the axle being initially rotated a bit due to the models construction.
trying to use local rotation to spin the blades along the axis pointing down the axle i assumed would work, and it does for placement and such, but when i set say: over 100 frames for the blades to rotate upon the axel 500 degrees, the blades start and finish with the correct rotation, but all the keyframes in between are horribly skewed.

i would have thought that using local rotation animation would automatically calculate the way every axis should rotate to animate how i wish... but it's not really happening. is there something i'm missing? thanks for any help!



-Tyson
Senior Member
Tyson

1 year ago
this is the gimbal lock problem. Its a bit of a long and confusing issue to do with how xyz curves are calculated and it comes up alot in rigging.
definitely worth getting your head around because its a pain in the arse when you rig characters and find the rotational axis are not working.
read this for more info [Link to thinkanimation.blogspot.com]

but for a quick fix. link all the blades to a central dummy and animated the dummy instead.

-toe_fungi
Junior Member
toe_fungi

1 year ago
cheers! yeah i could imagine that actually getting that thing to function correctly would be a nightmare for max programmers, i'll give the dummy a shot, thanks

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