Merge pull request #45 from 989onan/MergeBones

Merge bones

core/common.py

@@ -262,3 +262,25 @@ def update_progress(self, context, message):
 def finish_progress(context):
     context.window_manager.progress_end()
     context.area.header_text_set(None)
+
+def transfer_vertex_weights(context: Context, obj: bpy.types.Object, source_group: str, target_group: str, delete_source_group: bool = True) -> bool:
+    
+    modifier: bpy.types.VertexWeightMixModifier = obj.modifiers.new(name="merge_weights",type="VERTEX_WEIGHT_MIX")
+
+    modifier.mix_set = 'B'
+    modifier.vertex_group_a = target_group
+    modifier.vertex_group_b = source_group
+    modifier.mask_constant = 1.0
+
+    bpy.ops.object.mode_set(mode='OBJECT')
+    prev_obj: bpy.types.Object = context.view_layer.objects.active
+    context.view_layer.objects.active = obj
+    bpy.ops.object.modifier_apply(modifier=modifier.name)
+    if delete_source_group:
+        obj.vertex_groups.remove(obj.vertex_groups.get(source_group))
+    bpy.ops.object.mode_set(mode='EDIT')
+    bpy.ops.object.mode_set(mode='OBJECT')
+    context.view_layer.objects.active = prev_obj
+
+    return True
+

functions/armature_modifying.py

@@ -0,0 +1,158 @@
+import bpy
+from ..core import common
+from bpy.types import Operator, Context, Mesh, Armature, EditBone
+from ..core.register import register_wrap
+from .translations import t
+
+@register_wrap
+class AvatarToolkit_OT_RemoveZeroWeightBones(Operator):
+    bl_idname = "avatar_toolkit.remove_zero_weight_bones"
+    bl_label = t("Tools.remove_zero_weight_bones.label")
+    bl_description = t("Tools.remove_zero_weight_bones.desc")
+    bl_options = {'REGISTER', 'UNDO'}
+
+    threshold: bpy.props.FloatProperty(
+        default=0.01,
+        name=t("Tools.remove_zero_weight_bones.threshold.label"),
+        description=t("Tools.remove_zero_weight_bones.threshold.desc"),
+        min=0.0000001, 
+        max=0.9999999)
+
+    @classmethod
+    def poll(cls, context: Context) -> bool:
+        return common.get_selected_armature(context) is not None
+
+    def execute(self, context: Context) -> set[str]:
+        armature = common.get_selected_armature(context)
+        if not common.is_valid_armature(armature):
+            self.report({'ERROR'}, t("Tools.apply_transforms.invalid_armature"))
+            return {'CANCELLED'}
+
+        weighted_bones: list[str] = []
+
+
+        bpy.ops.object.mode_set(mode='OBJECT')
+        bpy.ops.object.select_all(action='DESELECT')
+
+        armature.select_set(True)
+        context.view_layer.objects.active = armature
+
+        meshes = common.get_all_meshes(context)
+        for mesh in meshes:
+            mesh_data: Mesh = mesh.data
+            for vertex in mesh_data.vertices:
+                for group in vertex.groups:
+                    if group.weight > self.threshold: 
+                        weighted_bones.append(mesh.vertex_groups[group.group].name) #add bone name to list of bones that are greater than the weight threshold
+        
+        bpy.ops.object.mode_set(mode='EDIT')
+        amature_data: Armature = armature.data
+        unweighted_bones: list[str] = []
+
+        #doing 2 loops to prevent modification of array during iteration
+        for bone in amature_data.edit_bones:
+            if bone.name not in weighted_bones:
+                unweighted_bones.append(bone.name) #add bones that arent in the list of bones that have weight into the list of bones that don't
+
+        for bone_name in unweighted_bones:
+            for edit_bone in amature_data.edit_bones[bone_name].children: 
+                edit_bone.use_connect = False #to fix randomly moving bones
+                edit_bone.parent = amature_data.edit_bones[bone_name].parent #to fix unparented bones.
+            amature_data.edit_bones.remove(amature_data.edit_bones[bone_name]) #delete list of unweighted bones from the armature
+
+        self.report({'INFO'}, t("Tools.remove_zero_weight_bones.success"))
+        return {'FINISHED'}
+
+@register_wrap
+class AvatarToolkit_OT_MergeBonesToActive(Operator):
+    bl_idname = "avatar_toolkit.merge_bones_to_active"
+    bl_label = t("Tools.merge_bones_to_active.label")
+    bl_description = t("Tools.merge_bones_to_active.desc")
+    bl_options = {'REGISTER', 'UNDO'}
+
+    delete_old: bpy.props.BoolProperty(name=t("Tools.merge_bones_to_active.delete_old.label"), description=t("Tools.merge_bones_to_active.delete_old.desc"), default=False)
+
+    @classmethod
+    def poll(cls, context: Context) -> bool:
+        if common.get_selected_armature(context) is not None:
+            if common.get_selected_armature(context) == context.view_layer.objects.active:
+                if context.mode == "POSE":
+                    return len(context.selected_pose_bones) > 1
+                elif context.mode == "EDIT_ARMATURE":
+                    return len(context.selected_bones) > 1
+        return False
+
+    def execute(cls, context: Context) -> set[str]:
+        
+        prev_mode: str = "EDIT"
+        if context.mode == "POSE":
+            prev_mode = "POSE"
+
+        #get active bone and a list of all other selected bones
+        bpy.ops.object.mode_set(mode='EDIT')
+        target_bone: str = context.active_bone.name
+
+        armature_data: Armature = context.view_layer.objects.active.data
+
+
+        bones: list[str] = [i.name for i in context.selected_bones]
+        bones.remove(target_bone)
+
+        for obj in common.get_all_meshes(context):
+            for bone in bones:
+                bone_name: str = armature_data.edit_bones[bone].name
+                common.transfer_vertex_weights(context=context,obj=obj,source_group=bone_name,target_group=armature_data.edit_bones[target_bone].name)
+                bpy.ops.object.mode_set(mode='EDIT')
+        for bone in bones:   
+            if cls.delete_old:
+                for bone_child in armature_data.edit_bones[bone].children:
+                    bone_child.parent = armature_data.edit_bones[bone].parent
+                armature_data.edit_bones.remove(armature_data.edit_bones[bone])
+        
+        bpy.ops.object.mode_set(mode=prev_mode)
+        return {'FINISHED'}
+    
+@register_wrap
+class AvatarToolkit_OT_MergeBonesToParents(Operator):
+    bl_idname = "avatar_toolkit.merge_bones_to_parents"
+    bl_label = t("Tools.merge_bones_to_parents.label")
+    bl_description = t("Tools.merge_bones_to_parents.desc")
+    bl_options = {'REGISTER', 'UNDO'}
+
+    delete_old: bpy.props.BoolProperty(name=t("Tools.merge_bones_to_parents.delete_old.label"), description=t("Tools.merge_bones_to_parents.delete_old.desc"), default=False)
+
+    @classmethod
+    def poll(cls, context: Context) -> bool:
+        if common.get_selected_armature(context) is not None:
+            if common.get_selected_armature(context) == context.view_layer.objects.active:
+                if context.mode == "POSE":
+                    return len(context.selected_pose_bones) > 0
+                elif context.mode == "EDIT_ARMATURE":
+                    return len(context.selected_bones) > 0
+        return False
+
+    def execute(cls, context: Context) -> set[str]:
+
+        prev_mode: str = "EDIT"
+        if context.mode == "POSE":
+            prev_mode = "POSE"
+        #get active bone and a list of all other selected bones
+        bpy.ops.object.mode_set(mode='EDIT')
+        armature_data: Armature = context.view_layer.objects.active.data
+
+        for obj in common.get_all_meshes(context):
+            for bone in [i.name for i in context.selected_bones]:
+                if armature_data.edit_bones[bone].parent != None:
+                    bone_name: str = armature_data.edit_bones[bone].name
+                    common.transfer_vertex_weights(context=context,obj=obj,source_group=bone_name,target_group=armature_data.edit_bones[bone].parent.name)
+                    bpy.ops.object.mode_set(mode='EDIT')
+        
+        for bone in [i.name for i in context.selected_bones]:   
+            if cls.delete_old:
+                for bone_child in armature_data.edit_bones[bone].children:
+                    bone_child.parent = armature_data.edit_bones[bone].parent
+                armature_data.edit_bones.remove(armature_data.edit_bones[bone])
+        
+        
+        bpy.ops.object.mode_set(mode=prev_mode)
+        return {'FINISHED'}

resources/translations/en_US.json

@@ -141,6 +141,19 @@
     "Tools.apply_transforms.desc": "Apply position, rotation, and scale to the armature and its meshes",
     "Tools.apply_transforms.invalid_armature": "Invalid armature selected",
     "Tools.apply_transforms.success": "Transforms applied successfully to armature and meshes",
+    "Tools.remove_zero_weight_bones.success": "Zero weight bones removed successfully",
+    "Tools.remove_zero_weight_bones.label": "Remove Zero Weight Bones",
+    "Tools.remove_zero_weight_bones.desc": "Remove bones from the armature that have weights less than threshold.",
+    "Tools.merge_bones_to_active.delete_old.desc": "Remove old bones when merging.",
+    "Tools.merge_bones_to_active.delete_old.label": "Remove Old Bones",
+    "Tools.merge_bones_to_active.desc": "Merge selected bones to active bone (selected in bright blue or orange).",
+    "Tools.merge_bones_to_active.label": "Merge Bones to Active",
+    "Tools.merge_bones_to_parents.delete_old.desc": "Remove old bones when merging.",
+    "Tools.merge_bones_to_parents.delete_old.label": "Remove Old Bones",
+    "Tools.merge_bones_to_parents.desc": "Merges every bone in the selection to each of their parents.",
+    "Tools.merge_bones_to_parents.label": "Merge Bones to Individual Parents",
+    "Tools.remove_zero_weight_bones.threshold.label": "Weight Threshold",
+    "Tools.remove_zero_weight_bones.threshold.desc": "If a bone is not weighted to any part of any mesh under the armature with a threshold greater than this, it is removed",
     "VisemePanel.create_visemes": "Create Visemes",
     "VisemePanel.creating_viseme": "Creating viseme: {viseme_name}",
     "VisemePanel.creating_viseme_detail": "Creating viseme: {viseme_name}",

ui/tools.py

@@ -8,6 +8,7 @@ from ..functions.translations import t
 from ..core.common import get_selected_armature
 from ..functions.seperate_by import AvatarToolKit_OT_SeparateByMaterials, AvatarToolKit_OT_SeparateByLooseParts
 from ..functions.additional_tools import AvatarToolKit_OT_ApplyTransforms
+from ..functions.armature_modifying import AvatarToolkit_OT_RemoveZeroWeightBones, AvatarToolkit_OT_MergeBonesToActive, AvatarToolkit_OT_MergeBonesToParents
 
 @register_wrap
 class AvatarToolkit_PT_ToolsPanel(bpy.types.Panel):
@@ -39,5 +40,10 @@ class AvatarToolkit_PT_ToolsPanel(bpy.types.Panel):
             row.operator(AvatarToolKit_OT_SeparateByLooseParts.bl_idname, text=t("Tools.separate_by_loose_parts.label"), icon='OUTLINER_OB_MESH')
             row = layout.row(align=True)
             row.operator(AvatarToolKit_OT_ApplyTransforms.bl_idname, text=t("Tools.apply_transforms.label"), icon='OBJECT_ORIGIN')
+            row = layout.row(align=True)
+            row.operator(AvatarToolkit_OT_RemoveZeroWeightBones.bl_idname, text=t("Tools.remove_zero_weight_bones.label"), icon='BONE_DATA')
+            row = layout.row(align=True)
+            row.operator(AvatarToolkit_OT_MergeBonesToActive.bl_idname, text=t("Tools.merge_bones_to_active.label"), icon='BONE_DATA')
+            row.operator(AvatarToolkit_OT_MergeBonesToParents.bl_idname, text=t("Tools.merge_bones_to_parents.label"), icon='BONE_DATA')
         else:
             layout.label(text=t("Tools.select_armature"), icon='ERROR')