CGTalk - IK Rigging prob

DanBroughton

07-16-2008, 09:46 AM

Hello all.
I'm having a problem rigging a IK arm on a robot model, where the joints are locked in certain axis.
http://www.propmaker.co.uk/images/example.png

The IK handle goes from the second joint to wrist joint but then I want the first joints X rotation to be driven by the IK handle. Does this make sense to anyone.
I'm probably not explaining it in the best way.

Any help / suggestions will be much appreciated.

Thank you all.

Dan

SubjectEgo

07-16-2008, 04:37 PM

Hey, Dan.

Here's a rough pass at what I believe you're looking for. The only joint limits I put in were on the inner shoulder (x-only). The remaining joints, while not limited, should still simulate the effect you want. For the pole vector, the only way to control the rotation and counteract the flipping is to rotate 'shoulderB_locator' in place. Like I said, it is a rough pass. Improving on the pole vector really depends on how you intend to animate this character, and how much control you want.

Other than that, it's not all that complicated. I hope this is what you're looking for.

DanBroughton

07-16-2008, 06:08 PM

Thank you very much you are a star. Works almost perfectly, I still needed to lock ShoulderB on the X rotation to stop the arm twisting but apart from that spot on. Once again thank you for a quick reply, saved my small brain from overheating.

Cheers

CGTalk Moderation

07-16-2008, 06:08 PM

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.