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kmp3d
03-05-2003, 04:20 PM
I've got a rig that I'm working on and I ran into a problem I can't seem to figure out. My rig is completely controlled using control objects (locaters, splines) that are grouped into a control hiearchy, much like the rig in the Maya: Secrets of the Pros book.
At first I used regular IK handle for the spine with no problems, my rig worked great. But I saw that some people used spline IK for the spine and could get better spine control with it. So I tried the spline IK and it worked great. I did the normal of making the CV's clusters and so forth. So my spine would move with rest of my character I put the clusters under my control group, so far so good. I could translate my rig in all directions with no problems using the transform control node that I created, but when I try to rotate my rig on the transform node theres an issue with the rotation. The root joint (pelvis) doesn't seem to rotate with the rest of the rig. The arms, legs, spine and everything else seems to rotate correctly but the hips don't rotate correctly. I had this exact same problem with my rig when I used regular IK for the spine but I overcame this problem by using a pole constraint on the IK on the spine, and sticking that control locater under my control hiearchy. But I don't know how to fix this using the spline IK. Any ideas? Will this not work? Do I have to rig my spine differently? Help............:shrug:

rebo
03-05-2003, 04:48 PM
You sure the IK handle controls are grouped under the transform node? and that the clusters are set to relative?

kmp3d
03-05-2003, 04:51 PM
the clusters may not be relative let me check that..... thanks

kmp3d
03-06-2003, 04:41 AM
I'm not sure if will be helpful to anyone but I finally got my rig working correctly, so i thought I'd share my insights. I did the suggestion to make the spline clusters relative, I'm not sure if thats directly related to my solution, but my rig works so thats whats important. Also another part of the problem was that my hip control object was constrained to the joint (pelvis) where the spline IK terminated, that seemed to cause the problem with the rotation. So I added one more joint just above that and started my spline IK there. Then I grouped the clusters and the control spline to the control groups... and BOOM !! .... everything works great... no problems with rotation, transformations, or scaling..... anyway thanks for the help

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