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Software Discussion
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3D Studio Max
LowMax Rig: Arm movement issue
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Bardur 78 posts28 Feb 2007Hi
I have been using LowMax (The Updated version) to make some animations lately (and i have improved 100% because of this rig
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And last night i was making a walk cycle and it worked out perfectly
until i came to the part where i had to make the motion of the arms.. i got them working perfectly from sideview: the swing and all.. and secondary motion and so fourth
BUT when i came to the swinging motion where the arms swing in front and behind the character the arms make a seriously weird curving... i have tried everything (and i would obviously not want to keyframe every frame)
to make the arms not make this wierd curv...
heres an image:
And i know tyson uses this rig (With mad skills) so i guess Tyson or someone else might have an idea how to fix this (kinda) serious problem
PS: im at school right now.. and my two side mates also get this problem
Regards
Bardur Mikladal -
28 Feb 2007I'll assume you're using FK....which means you have now entered the fantastic world of...
GIMBAL LOCK!!!!
...OH NOES....ALL IS LOST AND RUINED!!!
...well....not exactly. Without explaining what gimple lock is, because that would take a while, a quick fix is this: select the bone that is rotating improperly, goto the motion panel and change its rotational controller from "euler XYZ" to "TCB rotation".
Playback the animation....it shouldn't go all funky now! But, you also can't see its curves anymore either. The next thing you can try, is to switch it back to "euler XYZ" again. If that doesn't work...well, you'll simply have to continue animating without being able to see the curves.
If someone else has a better solution, I'd love to hear it since this is something that can sometimes drive animators nuts -
Bardur 78 posts28 Feb 2007Ok...
ill try that out Thanks alot for your quick answere
EDIT: It seems to work out perfectly
Thanks ALOT
Regard
Bardur Mikladal -
28 Feb 2007Glad I could help!
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28 Feb 2007
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Bardur 78 posts28 Feb 2007I found this...
i haven't read it myself
but i guess it explains it
Regards
Bardur -
10 Mar 2007
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10 Mar 2007
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10 Mar 2007Hey thanks for that solution Pete! Had no idea that would work too
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10 Mar 2007Nice one - some good reading.
Yep Gimbal is a pain in the behind... the solutions posted here are pretty cool. There are a couple of ways around it, some of which depend on the software I guess (ie the TCB thing suggested here for Max).
The first thing I would look at when I rig is the order of rotation and get something that 'makes sense'. (Not sure if you can do this in Max, but basically you can dictate which rotational axis gets computed first.) Not always easy, especially in shoulder areas.
Another thing I tend to do when rigging, similar to what Peter suggested, is to build in null objects. Like a parent object above the main control which I can access if I need to get myself out of a gimbal situation.
As a last resort I'll just key on every frame and 'beat' the gimbal issue. I'll wait till I'm near the final stages of the anim of course, but really, the only reason you get those funny arcs is because the computer is a bad in-betweener - don't be afraid to go a bit traditional and key every frame! -
10 Mar 2007KEY ON EVERY FRAME?????
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10 Mar 2007You seem somewhat shocked T?!...
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16 Mar 2007
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16 Mar 2007
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16 Mar 2007
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17 Mar 2007I appreciate the answer on that.
In a few days, I'll post my progress on a short anim I'm working on and ... for the education of it all ... I'll leave my troubling "floating body parts" where they are so you guys can give advice on how to fix it. I'm still having trouble keeping things linear.
The visual aid above was amazingly helpful ... I just think my use of lowmax is getting me a little confused ... I'll show it later.
DesktopE
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