sonosublime Jun 10 @ 6:57am
Rigs and skeletons
Hi all,

Could someone please tell me what the different rigs/skeletons of a model are called? I know there are 2 types: the default skeleton, and the "rig_biped_simple". But what are they actually called?

Also, is it possible to create custom rigs/skeletons (both types)?
Showing 1-7 of 7 comments
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Pte Jack Jun 10 @ 10:15am 
Huh??? Not sure what you are asking here...

The skeleton (or armature) is the actual bones of a model, they are connected in a parent child chain from the root bone to the extremities (ie pelvis to spine to arm to hand to fingers) The pelvis is parent to the spine which is parent to the arm which is parent to the hand which is parent to the fingers. Rotating or moving a parent will rotate or move anything lower in the chain.
If you move instead of rotating a parent bone it will separate from the main skeleton it is not constrained to the skeletal structure.

the rig_bipeg_simple is a script that creates constrains on the bones so they move as a chain by moving only one bone. The control bone will move or rotate the bones that are identified in the script but will restrict the movement so that the last bone in the constraint chain does not separate from the skeltal structure.
R234 Jun 10 @ 2:21pm 
If you mean the actual names, the rig of a default model without a rig script imported is called forward kinematics (or FK). rig_biped_single adds inverse kinematics (or IK) rigging to the legs and arms, while the spine remains FK.
Pte Jack Jun 10 @ 5:39pm 
Thanks R234, I was going to throw that in but I didn't want to get them reversed. (As I usually do)
sonosublime Jun 10 @ 5:42pm 
Oh, ok, I had the wrong idea. I thought there were 2 separate rigs, not a single skeleton with different scripts applied.

So is there a way to (for a non-standard Valve model):
1. Create custom skeleton?
2. If a skeleton already exists, but does not have the IK rig script available, is there a way to apply it?
Last edited by sonosublime; Jun 10 @ 5:55pm
Pte Jack Jun 10 @ 5:49pm 
If you are using a standard TF2 or Valve model or something that is hexed, try to apply the rig_biped_simple first. If the model accepts the rig then the control option for rhe model will change to the rig controls, if it doesn't accept the rig, the control will stay the same as the original.
This discusses custom rigs if you have to build one. I find it doesn't really explain it clearly but I think it is pretty much the only thing out there right now. You may be able to find a you tube tut on it, but I haven't looked for one yet. https://developer.valvesoftware.com/wiki/SFM/Making_custom_rigs
raptornx01 Jun 10 @ 7:54pm 
is there a particular model you want a rig for? there are a fair number of fanmade rigs for custom models out there. the one you want may already exist.
sonosublime Jun 12 @ 12:44am 
Originally posted by Pte Jack:
If you are using a standard TF2 or Valve model or something that is hexed, try to apply the rig_biped_simple first. If the model accepts the rig then the control option for rhe model will change to the rig controls, if it doesn't accept the rig, the control will stay the same as the original.
This discusses custom rigs if you have to build one. I find it doesn't really explain it clearly but I think it is pretty much the only thing out there right now. You may be able to find a you tube tut on it, but I haven't looked for one yet. https://developer.valvesoftware.com/wiki/SFM/Making_custom_rigs

Thanks for that link. I'll be sure to try it out.

Originally posted by raptornx01:
is there a particular model you want a rig for? there are a fair number of fanmade rigs for custom models out there. the one you want may already exist.

The model I am using are some Elsa and Anna (Frozen) models from Facepunch's Disney Infinity thread:

http://facepunch.com/showthread.php?t=1347636&page=2
(the download is the post by 'Gamerman12' on 5 May 2014)

I think that the 'rig_biped_mixamo' option also comes with the download. However, I tried both that option, and 'rig_biped_simple', and neither option appeared to apply IK rigs to the models. Not too sure why that is.
Last edited by sonosublime; Jun 12 @ 12:47am
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Date Posted: Jun 10 @ 6:57am
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