FIX: Not all selected are processed

__init__.py

@@ -20,7 +20,7 @@
 
 bl_info = {
     "name" : "Simple Material Flattener",
-    "author" : "Irssss  sssssson",
+    "author" : "Iron",
     "description" : "",
     "blender" : (3, 3, 1),
     "version" : (0, 0, 1),

operators.py

@@ -18,6 +18,8 @@ class SMF_OT_flatten_materials(Operator):
         # bpy.ops.object.material_slot_select()
         # bpy.ops.object.mode_set(mode='EDIT') (mode='OBJECT)
         # bpy.types.ShaderNodeTexImage() ???
+        # bpy.ops is expensive and should be avoided: re-assign verts without ops?
+        # view a verts mat? or a mats verts?
 
         selected_objects = [i for i in bpy.context.selected_objects]
         store_selected_objects = selected_objects.copy()
@@ -27,11 +29,13 @@ class SMF_OT_flatten_materials(Operator):
         bpy.ops.object.select_all(action='DESELECT')
 
         for o in selected_objects:
+            bpy.context.view_layer.objects.active = o
             imageMaterialNames = {}
             print("gettings materials from %s" % o.name)
             # select this object
             o.select_set(True)
-            # switch to edit mode
+            # switch to edit Mode
+            bpy.ops.object.material_slot_remove_unused()
             bpy.ops.object.mode_set(mode='EDIT')
             bpy.ops.mesh.select_all(action='DESELECT')
             
@@ -47,6 +51,7 @@ class SMF_OT_flatten_materials(Operator):
                 if not last_image: last_image = image
 
                 if last_image == image:
+                    print("add to selection")
                     o.active_material_index = slot.slot_index
                     bpy.ops.object.material_slot_select()
                     continue