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DavidMansaray
04-22-2010, 01:44 AM
I really have tried to solve this problem myself but i have not succeeded so once again i will turn to the forum to bail me out :)
Im creating a group based reverse foot. as shown in the art of rigging vol 1.
I'm trying to create a control that allows the heal to lift off of the ground whilst keeping the toe and ball planted.

so this is what ive done.

created a simple IK leg with the following joints. hip,knee, ankle, ball and toe.

IKRP solver between the hip and ankle (LEG IK)
SCIK solver between the ankle and ball
and the same between ball and toe.

to create the movment i'm looking for I create a null group made the Leg IK a child of it.

the rotation doesen't behave as it should.

it should do this
http://forums.cgsociety.org/attachment.php?attachmentid=152607&stc=1

but i get this

http://forums.cgsociety.org/attachment.php?attachmentid=152608&stc=1


what could i have done wrong?
Ive gone over this a million times with the results coming out the sameit just doesen't make sense. i know its probably somethign small. will really appreciate any help :)
goin
04-22-2010, 07:39 AM
Hi David, to me it looks like the behaviour is resulting from the sc iks not being parented to some group nodes. Usually an ik handle will stay put if it's grouped under some transform node. If this is not the case the ik handles will move which looks much like in your images.

Try the following hierarchy:

foot_ctrl
-> tipToe_grp
-> -> toeTip_ikHandle
-> -> toeWiggle_grp
-> -> -> toe_ikHandle
-> -> heelLift_grp
-> -> -> leg_ikHandle

that should do it. If not let me know. I am with breakfast right now and it's just a freerun...

Cheers, Ingo
aaibel
04-22-2010, 08:58 AM
Hi David,

I had problems with the reverse foot as well, and maya 2008 version...it was very strange, even the Goblin file which comes with the tutorial did not work and I got similar strange behaviour to yours. I then opened the file in maya 2010 and it worked (the goblin file and my file too). I am not enitrely sure what is causing it unfortunately.

Now at the moment the same script works in Maya 2009 but not in Maya 2010 and it has worked in Maya 2010 before. However the Goblin file seems to work in both. Very strange indeed!

Oh I just noticed in your screenshot as well....Is sticky turned on for the IK handles?

Sorry I can't really help...just thought I'd share what issues I had with it.
DavidMansaray
04-22-2010, 09:15 AM
Thank you for your respnce goin but this did not work for me unfortunately. Thank you very much for your time.

aaibel, you made my day :)

the problem was that i did not have sticky turned "on" for the IK handles. its all working the way that it should do :)
glad to hear that somone else has experienced the same thing as I did.

I love this forum. damn im happy :D
aaibel
04-22-2010, 10:35 AM
Glad I could help! Yeah it took me a while to figure that one out when I had the problem :) Hope you don't come across the other strange "Maya Version- Reverse Foot" problems.
DavidMansaray
04-27-2010, 12:29 AM
Thanks a lot :) best of luck to you too
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04-27-2010, 12:29 AM
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