ikRP solver connecting 3 bones

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# 1 08-02-2010 , 06:51 PM

Registered User
Join Date: Jan 2005

Location: vienna

Posts: 1,095

I´m currently rigging a quadruped (cow).
the leg from hip to ankle is connected with an ikRP solver (4 joints, not like humanRig with only 3 joints).

so - normally the middle two bones should have an evenly distributed degree of rotation when moving the ikHandle.

but it doesn´t. first bone "eats" almost all rotation, second bone in the hierarchy doesn´t "compress", it just stops rotating and pushes up on the shoulderJoint - but can be stretched out normally. .

thats why my cow will never be capable of laying down but is doomed to stand for its whole life on her not-working back legs.

pic is attached.
I know it must work. I have a working rig, but I cant transfer iks to my rig. also I´d like to know whats going on.

working rig is not multiRP solver but ikRP solver as well.

any ideas?

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everything starts and ends in the right place at the right time.

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# 2 28-02-2010 , 04:27 AM

Technical Director
Join Date: Feb 2004

Posts: 2,988

Hmmm... Not sure how to fix it without looking at the file.

What may help, is that in the Visor, there is a pre-made quadruped rig using FBIK. Might be worth taking a look into.

Imagination is more important than knowledge.

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