scripts-blender/addons/asset_pipeline_2/core.py

@@ -69,12 +69,17 @@ def merge_task_layer(
         transfer_data,
         target_col,
     )
-
-    remap_users(context)
-
     bpy.ops.outliner.orphans_purge(
         do_local_ids=True, do_linked_ids=False, do_recursive=True
     )
+
+    # TODO DEBUG WHY REMAP USERS SOMETIMES REPLACES LOCAL OBJ WITH SOURCE OBJ
+    # ADDING A PURGE BEFORE THIS FIXES IT FOR SOME REASON?
+    remap_users(context)
+
+    # bpy.ops.outliner.orphans_purge(
+    #     do_local_ids=True, do_linked_ids=False, do_recursive=True
+    # )
     asset_suffix.remove_suffix_from_hierarchy(target_col)
 
 

scripts-blender/addons/asset_pipeline_2/transfer_functions.py

@@ -1,5 +1,6 @@
 import bpy
 from bpy import context
+from . import asset_suffix
 
 
 def transfer_vertex_group(
@@ -78,3 +79,45 @@ def transfer_modifier(item, obj_target):
                     {"object": obj_target, "active_object": obj_target},
                     modifier=mod.name,
                 )
+
+
+def transfer_material_slot(item, obj_target):
+    obj_source = item.id
+    # Delete existing material slot if exists
+    for idx in range(len(obj_source.material_slots)):
+        slot = obj_source.material_slots[idx]
+        if asset_suffix.get_asset_basename(slot.material.name) == item.name:
+            obj_target.active_material_index = idx
+            bpy.ops.object.material_slot_remove({"object": obj_target})
+
+    # Transfer material slots
+
+    for idx in range(len(obj_source.material_slots)):
+        if idx >= len(obj_target.material_slots):
+            slot = obj_source.material_slots[idx]
+            if asset_suffix.get_asset_basename(slot.material.name) == item.name:
+                bpy.ops.object.material_slot_add({"object": obj_target})
+                obj_target.material_slots[idx].link = obj_source.material_slots[
+                    idx
+                ].link
+                obj_target.material_slots[idx].material = obj_source.material_slots[
+                    idx
+                ].material
+
+    # Transfer active material slot index
+    obj_target.active_material_index = obj_source.active_material_index
+
+    # Transfer material slot assignments for curve
+    if obj_target.type == "CURVE":
+        for spl_to, spl_from in zip(obj_target.data.splines, obj_source.data.splines):
+            spl_to.material_index = spl_from.material_index
+
+    # TODO MAKE USE_ABLE AGAIN
+    # # Rest of the loop applies only to meshes.
+    # if obj_target.type != "MESH":
+    #     continue
+
+    # # Transfer material slot assignments for mesh
+    # for pol_to, pol_from in zip(obj_target.data.polygons, obj_source.data.polygons):
+    #     pol_to.material_index = pol_from.material_index
+    #     pol_to.use_smooth = pol_from.use_smooth

scripts-blender/addons/asset_pipeline_2/transferable_data.py

@@ -33,6 +33,8 @@ def apply_transfer_data(
                     )
                 if item.type == "MODIFIER":
                     transfer_functions.transfer_modifier(item, target_obj)
+                if item.type == "MATERIAL_SLOT":
+                    transfer_functions.transfer_material_slot(item, target_obj)
                 update_transfer_data_ownership(
                     transfer_data_item=item,
                     target_obj=target_obj,