"Baking" Retargetted Animations

As you may know, sometimes animations can look "weird" when importing into blender from umodel. The reason is typically that there is retargetting being performed per-bone. For example, a bone can have TranslationRetargetingMode set to Animation, Skeleton, etc., which affects the way the animation is played, and these changes aren't destructively applied when exporting (which is probably for the better)

The below script fixes this by modifying the fcurves of all actions in current file (be careful) to make it look the way it looks in umodel, i.e. correct.

Here's the code:

import bpy
import re

SKELETON_DUMP = """

"""

parsed_modes = {}
pattern = re.compile(r"^\s*BoneTree\[(\d+)\].*?TranslationRetargetingMode=\w+\s*\((\d+)\)")
for line in SKELETON_DUMP.splitlines():
   match = pattern.search(line)
   if match:
   parsed_modes[int(match.group(1))] = int(match.group(2))

armature = bpy.context.active_object

bone_name_to_index = {bone.name: i for i, bone in enumerate(armature.data.bones)}
index_to_bone_name = {i: bone.name for i, bone in enumerate(armature.data.bones)}

for action in bpy.data.actions:
   for bone_name, bone_index in bone_name_to_index.items():
   if parsed_modes.get(bone_index) == 1:
   for i in range(3):
   fcurve = action.fcurves.find(f'pose.bones["{bone_name}"].location', index=i)
   if fcurve:
   for key in fcurve.keyframe_points:
   key.co[1] = 0.0

To use it, you must dump the skeleton being used by opening the skeleton and pressing D in umodel. Check console for the dumped properties and place them in the SKELETON_DUMP variable, then select your armature and run the script.

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