View Full Version : Moving rotation point with a controler

01 January 2009, 01:30 PM
Hi everyone !
I've seen, a couple of days ago, a rigging demoreel, where the animator has the possibility to move the rotation point of the foot (on an IK leg) by moving a sphere controler.
So he could translate the sphere to the end of the toes and the foot rotates on the toes, he puts it on the heel, and the foot rotates on the heel... It was very interesting.
But I don't know how to do that, and have not found any information on google.
So if someone here could help me to understand how to do that... I'll be very nice.


01 January 2009, 03:07 PM
does the reel show the possibility to key the pivot and then key it on a different position, without breaking the animation ? I doubt it's possible without scripting or programming. It's easy to do it with a little math only if you don't want the ability to key the pivot on different place.

01 January 2009, 03:24 PM
I didn't see keys, so can't answer you.
But how do you do without keying system (with a keying system, I think I could do with MEL scripts ^^).

Thanks for your interest.

01 January 2009, 03:27 PM
Could it be "only" a vector? I say "only" because there's obviously more to it than that, but is it essentially a vector?

01 January 2009, 03:54 PM
One way:
Create a cube;
Create a locator;
Connect the locator.translate >to> cube.rotatePivot;

I often do it for main controls of my characters. Although making the locator "unkeyable" is a must....

I really had thought about this a lot. And I can't find a way to do it without messing with the matrices in some sort of plugin and scriptjobs.

01 January 2009, 04:38 PM
Thanks a lot for your answer.

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