Connect Bones

- Connect bones button added.
- Added slider so the user can choose the distance, cats was set at a hard coded amount which could sometimes cause some issues for some modals.

functions/additional_tools.py

@@ -1,4 +1,5 @@
 import bpy
+import math
 from bpy.types import Context, Operator
 from ..core.register import register_wrap
 from ..core.common import get_selected_armature, is_valid_armature, get_all_meshes
@@ -35,3 +36,56 @@ class AvatarToolKit_OT_ApplyTransforms(Operator):
 
         self.report({'INFO'}, t("Tools.apply_transforms.success"))
         return {'FINISHED'}
+    
+@register_wrap
+class AvatarToolKit_OT_ConnectBones(Operator):
+    bl_idname = "avatar_toolkit.connect_bones"
+    bl_label = t("Tools.connect_bones.label")
+    bl_description = t("Tools.connect_bones.desc")
+    bl_options = {'REGISTER', 'UNDO'}
+
+    min_distance: bpy.props.FloatProperty(
+        name=t("Tools.connect_bones.min_distance.label"),
+        description=t("Tools.connect_bones.min_distance.desc"),
+        default=0.005,
+        min=0.001,
+        max=0.1
+    )
+
+    @classmethod
+    def poll(cls, context: Context) -> bool:
+        return get_selected_armature(context) is not None
+
+    def execute(self, context: Context) -> set[str]:
+        armature = get_selected_armature(context)
+        if not is_valid_armature(armature):
+            self.report({'ERROR'}, t("Tools.connect_bones.invalid_armature"))
+            return {'CANCELLED'}
+
+        bpy.ops.object.mode_set(mode='EDIT')
+        
+        edit_bones = armature.data.edit_bones
+        bones_connected = 0
+
+        for bone in edit_bones:
+            if len(bone.children) == 1 and bone.name not in ['LeftEye', 'RightEye', 'Head', 'Hips']:
+                child = bone.children[0]
+                distance = math.dist(bone.head, child.head)
+
+                if distance > self.min_distance:
+                    bone.tail = child.head
+                    if bone.parent and len(bone.parent.children) == 1:
+                        bone.use_connect = True
+                    bones_connected += 1
+
+        bpy.ops.object.mode_set(mode='OBJECT')
+
+        self.report({'INFO'}, t("Tools.connect_bones.success").format(bones_connected=bones_connected))
+        return {'FINISHED'}
+
+    def invoke(self, context, event):
+        return context.window_manager.invoke_props_dialog(self)
+
+    def draw(self, context):
+        layout = self.layout
+        layout.prop(self, "min_distance")

resources/translations/en_US.json

@@ -165,6 +165,12 @@
     "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",
+    "Tools.connect_bones.label": "Connect Bones",
+    "Tools.connect_bones.desc": "Connect bones with their respective children",
+    "Tools.connect_bones.invalid_armature": "Invalid armature selected",
+    "Tools.connect_bones.min_distance.label": "Minimum Distance",
+    "Tools.connect_bones.min_distance.desc": "Minimum distance between bones to connect them",
+    "Tools.connect_bones.success": "Connected {bones_connected} bones successfully",
     "MergeArmatures.select_armature": "Please select an armature",
     "MergeArmatures.title.label": "Merge Armatures:",
     "MergeArmatures.label": "Merge Armatures",

ui/tools.py

@@ -8,7 +8,7 @@ from ..functions.translations import t
 from ..core.common import get_selected_armature
 from ..functions.mesh_tools import AvatarToolkit_OT_RemoveUnusedShapekeys
 from ..functions.seperate_by import AvatarToolKit_OT_SeparateByMaterials, AvatarToolKit_OT_SeparateByLooseParts
-from ..functions.additional_tools import AvatarToolKit_OT_ApplyTransforms
+from ..functions.additional_tools import AvatarToolKit_OT_ApplyTransforms, AvatarToolKit_OT_ConnectBones
 from ..functions.armature_modifying import AvatarToolkit_OT_RemoveZeroWeightBones, AvatarToolkit_OT_MergeBonesToActive, AvatarToolkit_OT_MergeBonesToParents
 
 @register_wrap
@@ -47,5 +47,7 @@ class AvatarToolkit_PT_ToolsPanel(bpy.types.Panel):
             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')
+            row = layout.row(align=True)
+            row.operator(AvatarToolKit_OT_ConnectBones.bl_idname, text=t("Tools.connect_bones.label"), icon='BONE_DATA')
         else:
             layout.label(text=t("Tools.select_armature"), icon='ERROR')