CGTalk - moving the pivot point on the foot

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goosh

04-30-2002, 12:10 PM

Hi all

I want to create a skeleton that will alow me to change the pivot point of my foot from the heal to the ball to the toes.

How can I get around this?

If I move the pivot point directly, all my animation is screwed up.. so I want to keep my animation when the pivot point is in the heal.. then be able to change it to the ball and carry on animating the feet around the ball.

Any ideas? It doesn't necesarily have to be the pivot point per se.. I just want to be able to rotate the foot around the heal, the ball and the toes whenever I want it..

ideas? thoughts?

thanks

Goosh

SheepFactory

04-30-2002, 12:35 PM

thats called the reverse foot setup.

there is a tutorial for that in the learning maya book , that chapter should also be avaible at Aliaswavefronts website under learning tools (primitive man)

i dont have time right now but if you cant find it PM me i'll describe how to do it.

A|i

goosh

04-30-2002, 09:28 PM

Mmnnn.. nope..

The reverse foot control is something else..

Actually.. I would like to imprement this movement of the pivot point to the reverse foot lock set up that I already have...

:hmm:

G

jschleifer

05-01-2002, 01:29 AM

The tough thing with moving the pivot of an object is that suddenly the translations mean different things depending on where you are in the animation.. if the pivot is at the ball of the foot, then your translation curves mean one thing. If it's at the heel, then they mean something else.

It's fine for working straight ahead, but as soon as you need to go back and tweak.. you're opening up a huge can of worms.

If you (and your animators) are technically savy and can handle a bit more complicated of a setup, you may be able to try using constraints to blend between two different objects controlling the foot.. one for the ball, and one for the heel.. then you can animate the constraints on and off, keying the "ball control" and the "heel control".. but again, this makes it more difficult to edit your animation curves and get smooth motion out of it.

-jason

goosh

05-01-2002, 07:28 AM

Hi Jason

Yeah.. that's what I figured.. and the few quick tests that I did I encountered just that...

I was thinking about the switching constraints between the ball and the heel, and doing some fancy stuff like that.. but yeah, editing would be a problem..

Oh well.. I could always have two different rigs and use them for specific shots

Thanks and hurry up with Two Towers will you :thumbsup: can't wait... :) :)

Javier

jschleifer

05-01-2002, 09:58 AM

Thanks and hurry up with Two Towers will you can't wait...

workin on it! :)

I found that using a setup similar to the reverse foot setup so I have whatever control I want, and then just using that control when I need it works fine.. all one rig, so no need to support multiple rigs.. niiiice.. :)

good luck!
-jason

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