workshop rework

archive/legacy_python/basic_scripting_demo/3.py

@@ -0,0 +1,20 @@
+import unreal
+
+OLD = unreal.load_asset("/Game/ImportedAssets/Trees/SM_tree04.SM_tree04")
+NEW = unreal.load_asset("/Game/ImportedAssets/Trees/SM_tree01.SM_tree01")
+
+sub = unreal.get_editor_subsystem(unreal.EditorActorSubsystem)
+actors = sub.get_all_level_actors()
+
+old_mesh_count = 0
+
+with unreal.ScopedEditorTransaction("Swap meshes"):
+    for actor in actors:
+        comp = actor.get_component_by_class(unreal.StaticMeshComponent)
+        if comp and comp.static_mesh == OLD:
+            comp.set_editor_property("static_mesh", NEW)
+            # comp.set_static_mesh(NEW) -- tak tez mozna ale undo nie zadziala 
+            # bo zmiana nie jest robiona przez edytor wiec jej on nie rejestruje
+            old_mesh_count += 1
+
+unreal.log(f"Swapped {old_mesh_count} meshes")