Toe roll...

[kurisil]

hi everybody

sorry for asking this question again.. i searched this forum.. there a few posts regarding this.. but still i am not able to sort it out..

My problem is that i am not able to make my ball joint rotate in both +ve and -ve directions when i go with the reverse foot setup(ex.toe tapping the ground ).so i went back to the setup of maya tutorial of primitive man with all the expressions,rotate pivot stuff and the point and orient constraints,But still the problem persists.(when the passing leg passes the stationary leg i want the passing legs toe to point down,but that is not happening).Is FK the only way out.What all u guys do..

Help me with tutorials/tips..

please..please..help..i am desperate to fix it asap

Karthikeyan Varadarajulu

[jschleifer]

Hmm.. this is why the inverse foot control is lacking a bit..

you can add another group over the ikHandle which controls the toe, and put the pivot of that group at the ball of the foot. Then, add an attribute which controls the rotation of that group. This way, you can have your inverse-foot control that you like, and have another rotation available for the toe.

another issue I have with the inverse foot is the rotation being at the heel of the foot instead of the ankle.. this is just a personal preference, but I've found I got much better results when animating by having the rotation at the ankle. I hardly ever had a shot where it was really really necessary to have the control at the heel.. usually the characters are moving around so much, it's easy enough to make it LOOK like the heel is the contact, with the rotation actually being in the correct place (ankle). Just personal opinion, really..

---

jason schleifer
animator
weta digital

[kurisil]

In reply to:
Hmm.. this is why the inverse foot control is lacking a bit..

you can add another group over the ikHandle which controls the toe, and put the pivot of that group at the ball of the foot. Then, add an attribute which controls the rotation of that group. This way, you can have your inverse-foot control that you like, and have another rotation available for the toe.

another issue I have with the inverse foot is the rotation being at the heel of the foot instead of the ankle.. this is just a personal preference, but I've found I got much better results when animating by having the rotation at the ankle. I hardly ever had a shot where it was really really necessary to have the control at the heel.. usually the characters are moving around so much, it's easy enough to make it LOOK like the heel is the contact, with the rotation actually being in the correct place (ankle). Just personal opinion, really..---
jason schleifer
animator
weta digital

Many thanks Jason...I will try u'r method.. can u give u'r email id

[jschleifer]

In reply to:
Many thanks Jason...I will try u'r method.. can u give u'r email id

Good luck! lemme know how it goes.. best way to get ahold of me is through here.

-jason

---

jason schleifer
animator
weta digital

[kurisil]

hi jason,

I have decided not to use reverse foot.I am now using the primitive man tutorial for the leg setup alone.your tip (of grouping)was very useful.What i have done is to have a ik from hip to ankle(ankle IK),another from ankle to ball(Ball IK) and from ball to toe.Grouped the ankle and ball IK's and had the pivot at the heel joint which is between the ball and the ankle.the rotatepivot of this group had an exp' written so that the foot bends at the ball joint.the ball joint was grouped again for orient constraining it with a null node.so now the ball joint becomes free for keyframing.Looks fine as it is,let me see.

bfn,

Karthikeyan Varadarajulu