maya rigging - leg problem

[JasonStockton]

Here are a couple of things that may help you. The legs are brown from the IK handle attachment on each leg. The knee doesn't bend from a pole vector, but from the movement of the IK handle's translation. A pole vector orients the knee in the direction of the control that you constrain it to, this keeps the knees from going wild in positions such as squats and other knee bending motions. As far as the joints spinning goes that could be any number of things, but if you are willing to share the file and I have the time I could take a look at it for you. Not to fix it for you of course, but to help provide a solution :) . No promises. And If you fix it on your own SWEET!!! Other than that good luck with your project.


Oh ya, and one other thing. You might want to post rigging problems in the Character Rigging forum. It may provide more views from people with an interest in rigging. I just happened to be browsing through other forums when I saw this.

[Keithtron]

The biggest problem I see right away is the joint placement. Your hip>knee>ankle bones are all in a pretty straight line. I would shift the knee bone forward towards the kneecap to have more of a bend in the skeleton, a bend that's closer to a how a real person's leg bends. Having that bend in there gives the IK handle a hint as to what way the knee is supposed to bend. That should help a lot.

Then, when you create the pole vector constraint, make sure your control object is snapped to the position of the knee. That, plus building an initial bend into the knee like I suggested, should help keep your joints from freaking out when you set it up.

Good luck!

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