Re: [GD-General] Pelvis transformation during animation

[pontus b. <her...@ho...>]

Thanks for the quick reply!
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This sounds very interesting; I=92ll be trying this out tomorrow. We actual=
ly created a tool for the artists just so they could do this extra translat=
ion and rotation separately, it never occurred to me that you could just ad=
d another joint above the pelvis in the hierarchy. So you just let them dea=
l with the rotations and translations in their 3D software?
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Regards,
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Pontus Birgersson
Shortfuse Entertainment

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Date: Wed, 14 Nov 2007 15:57:04 -0800From: "Nathan Martz" <Nathan@doublefin=
e.com>Subject: Re: [GD-General] Pelvis transformation during animationTo: g=
ame...@li... It sounds like you are trying to =
both drive the character's game/logicalposition by movement of the root joi=
nt and also to use it to skin/deformthe characters. I would suggest that yo=
u use different joints for eachpurpose. In our engine, we have a joint that=
 we call the delta-transthat indicates the character's position and rotatio=
n deltas for eachframe. That has a child that we call the "Root" joint whic=
h is thebasemost deforming joint. At munge time (after export but before th=
egame gets it) we extract data from the delta-trans and then strip thatjoin=
t out of the skeleton. So, in this kind of situation, something likea backf=
lip might simply translate the delta-trans backwards a bit whilethe root an=
d other joints are doing all manner of spins and translation.I believe that=
's pretty much how most people do root motion, and aGoogle search for "root=
 motion" will probably turn up some good info.
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