First try to add undo

studio/src/input.rs

@@ -3,6 +3,7 @@ use bevy::{
     prelude::*,
     utils::HashSet,
 };
+use space_editor::prelude::space_undo::UndoRedo;
 
 #[derive(SystemSet, Hash, Debug, PartialEq, Eq, Clone)]
 pub struct StudioInputSystem;
@@ -18,6 +19,7 @@ impl Plugin for StudioInputPlugin {
                 translate_debug_toggle,
                 translate_dcc_camera_events,
                 translate_fps_camera_events,
+                send_undo_event
             )
                 .in_set(StudioInputSystem)
                 .after(bevy::input::InputSystem),
@@ -291,3 +293,15 @@ fn read_mouse_delta(mut mouse_motion: EventReader<MouseMotion>) -> Vec2 {
         .read()
         .fold(Vec2::ZERO, |accum, current| accum + current.delta)
 }
+
+
+// TODO: Make it configurable
+fn send_undo_event(
+    mut events : EventWriter<UndoRedo>,
+    keyboard: Res<Input<KeyCode>>,
+) {
+    if keyboard.pressed(KeyCode::ControlLeft) && keyboard.just_pressed(KeyCode::Z) {
+        events.send(UndoRedo::Undo);
+        info!("Undo event sent");
+    }
+}

studio/src/scene.rs

@@ -13,6 +13,7 @@ use bevy::{
     scene::InstanceId,
 };
 
+use space_editor::prelude::PrefabMarker;
 #[cfg(feature = "wasm")]
 use wasm_bindgen::prelude::wasm_bindgen;
 
@@ -207,6 +208,7 @@ fn spawn_next_scene(
             SceneRoot,
             SceneElement,
             SpatialBundle::default(),
+            PrefabMarker
         ))
         .id();
 
@@ -254,7 +256,7 @@ fn tag_scene_elements(
         };
 
         if gltf.named_nodes.contains_key(&**name) {
-            cmd.entity(ent).insert(SceneElement);
+            cmd.entity(ent).insert(SceneElement).insert(PrefabMarker);
         }
     }
 }