[Bf-animsys] How to transfer characters between similar rigs by script ?

[Joshua Leung]

Hi,

Without checking your file, from the sounds of things, this is a problem
which Rigify and/or Rigamarule (Bassam's tool) address. Namely, they allow
you to create a "template" rig for defining the mapping between a basic
editable rig and the full autogenerated rig, with all generated bones
adjusted to work with the moved joints. It'd probably be worth taking a
look there to get an idea of how they do this. Perhaps you can even manage
to find a way to use these tools for your purpose?

Hope that helps,
Joshua


On Mon, Oct 14, 2013 at 11:10 PM, Gaia <gaia.clary at machinimatrix.org> wrote:

> Hi;
>
> === The setup ===
>
> This is the demo blend file for my issue:
> http://www.pasteall.org/blend/24589
>
> The blend file contains:
>
> - the target rig
> - a demo character attached to the target rig
> - the development rig
> - a script that attempts to make the intended rig adjustments (but fails)
>
> - The development rig has deform bones and a huge amount of control bones.
> - The Target rig has only the deform bones (and an attached human
> character)
>
> The target rig has been reposed slightly and a new restpose has been
> defined on it. So that the deform bones of both rigs no longer match
> exactly in rest pose.
>
> === The Task ===
>
> Now i want to move the character from the target rig "back" to the
> development rig without modifying the development rig. That is i want to
> adjust the target rig so that it matches the development rig. But the
> character shall follow these adjustments (via its weight maps)
>
> My manual workflow for doing this is:
>
> - Select the target rig and go to pose mode
> - move the tail of each limb of the target rig to the corresponding tail
> in the development rig
> - Adjust the target rig bones using "scale" until all bones match
> visually the pose bones of the development rig.  I omit scaling the leaf
> bones because these bones have arbitrary lenghts. While adjusting the
> target rig, my character mesh rescales correctly due to its weight maps
> and due to the rot/scale constraints of its bones.
> - Apply the target rig's armature modifier
> - Rig the character to the development rig.
>
> ==== The Goal ====
>
> Now i want to do this workflow by using a script. My problem is how i
> can correctly adjust the pose bones of the target rig to match the pose
> bones of the development rig. The embedded script in the blend file does
> not work. As it does not reposition the bone tails of the limbs. This is
> where i am actually stuck. (How to reposition the pose bone bone tails)
>
> Thanks for any help how this can be implemented.
>
> cheers,
> Gaia
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