Added fix for Child Of constraints.

Child of constraints should no longer corrupt animation export when scaling, make sure to clear all pose transforms before exporting though.

Just wanted to add this in to 1.2 before i make it into a previous release.

Author: Jim-Kroovy

MMT_Export_FBX.py

@@ -37,7 +37,20 @@ def draw(self, context):
         self.layout.label(text=message)
 
     bpy.context.window_manager.popup_menu(draw, title = title, icon = icon)
-            
+
+# fixes child of constraints after scaling...
+def Fix_Child_Of_Constraints(armature):
+    bpy.ops.object.mode_set(mode='POSE')
+    for p_bone in armature.pose.bones:
+        for constraint in p_bone.constraints:
+            if constraint.type == 'CHILD_OF':
+                bpy.context.active_object.data.bones.active = p_bone.bone
+                context_copy = bpy.context.copy()
+                context_copy["constraint"] = p_bone.constraints[constraint.name]
+                bpy.ops.constraint.childof_clear_inverse(context_copy, constraint=constraint.name, owner='BONE')
+                bpy.ops.constraint.childof_set_inverse(context_copy, constraint=constraint.name, owner='BONE')
+    bpy.ops.object.mode_set(mode='OBJECT')
+    
 # sets animation location scale to and from UE4... (this bit can take a few minutes if you have many keyframes or are batch exporting, it does a lot of work!)
 def A_UE4_Scale(action, float, armature):
     bpy.ops.object.mode_set(mode='POSE')
@@ -85,6 +98,8 @@ def O_UE4_Scale(objects, float):
     for obj in objects:
         bpy.context.view_layer.objects.active = obj
         bpy.ops.object.transform_apply(location=True, rotation=True, scale=True)
+        if obj.type == 'ARMATURE':
+            Fix_Child_Of_Constraints(obj)
     # return active object...
     bpy.context.view_layer.objects.active = active
 
@@ -216,4 +231,4 @@ def Export(MMT):
         E_Meshes(bpy.context.selected_objects, MMT)
 
 # used for testing...
-#Export(bpy.context.scene.JK_MMT)
+#Export(bpy.context.scene.JK_MMT)