Skip to content

Include root motion bone #73

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
bangbangsheshotmedown wants to merge 2 commits into
base: master
Choose a base branch
from
Open

Include root motion bone #73

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
9fc0df0
Include root motion bone
bangbangsheshotmedown Aug 15, 2025
4f66547
Simplify sort
bangbangsheshotmedown Aug 15, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
39 changes: 37 additions & 2 deletions blender-4.1/iqm_export.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -664,6 +664,14 @@ def derigifyBones(context, armature, scale):
def2org = {}
defparent = {}
defchildren = {}

# Find the root motion bone
root_bone = None
for bone in data.bones.values():
if bone.name.lower() == 'root' and bone.parent is None:
root_bone = bone
break

for bone in data.bones.values():
if bone.name.startswith('ORG-'):
orgbones[bone.name[4:]] = bone
Expand All @@ -672,7 +680,20 @@ def derigifyBones(context, armature, scale):
defnames.append(bone.name[4:])
defbones[bone.name[4:]] = bone
defchildren[bone.name[4:]] = []

if root_bone:
root_name = root_bone.name
defnames.append(root_name)
defbones[root_name] = root_bone
defchildren[root_name] = []
# Create a dummy org entry for the root bone
orgbones[root_name] = root_bone
org2defs[root_name] = [root_name]
def2org[root_name] = root_name

for name, bone in defbones.items():
if root_bone and name == root_bone.name:
continue
orgname = name
orgbone = orgbones.get(orgname)
splitname = -1
Expand All @@ -686,7 +707,11 @@ def derigifyBones(context, armature, scale):
orgname = name[:splitname] + suffix
orgbone = orgbones.get(orgname)
org2defs[orgname].append(name)
def2org[name] = orgname
if root_bone and name == root_bone.name:
def2org[name] = root_name
else:
def2org[name] = orgname

for defs in org2defs.values():
defs.sort()
for name in defnames:
Expand All @@ -701,6 +726,8 @@ def derigifyBones(context, armature, scale):
if orgparent and orgparent.name.startswith('ORG-'):
orgpname = orgparent.name[4:]
defparent[name] = org2defs[orgpname][-1]
elif orgparent and root_bone and orgparent == root_bone:
defparent[name] = root_bone.name
else:
defparent[name] = defs[i-1]
if name in defparent:
Expand All @@ -709,6 +736,10 @@ def derigifyBones(context, armature, scale):
bones = {}
worldmatrix = armature.matrix_world
worklist = [ bone for bone in defnames if bone not in defparent ]

# sort to ensure root is first
worklist.sort(key=lambda b: (b != "root", b))

for index, bname in enumerate(worklist):
bone = defbones[bname]
bonematrix = worldmatrix @ bone.matrix_local
Expand All @@ -724,7 +755,11 @@ def collectBones(context, armature, scale):
data = armature.data
bones = {}
worldmatrix = armature.matrix_world
worklist = [ bone for bone in data.bones.values() if not bone.parent ]
# ensure root and deformed bones appear first
worklist = sorted(
(bone for bone in data.bones.values() if not bone.parent),
key=lambda b: (b.name != "root", b.use_deform == False, b.name)
)
for index, bone in enumerate(worklist):
bonematrix = worldmatrix @ bone.matrix_local
if scale != 1.0:
Expand Down