Started buildings undo system implementation

godot/main/editor.gd

@@ -17,6 +17,7 @@ func _ready():
 		$"%select_poi",
 		$"%select_road_lines",
 		$"%select_npc",
+		$"%buildings_save",
 		]:
 		b.connect("pressed", $WorldEditor, "editor_command", [b.name, []])
 	$WorldEditor.connect("editor_event", self, "editor_event")
@@ -120,8 +121,9 @@ func check_edit_building():
 				print("get closest building")
 				$WorldEditor.editor_command("get_closest_building", [Transform(Basis(), proj)])
 	elif Input.is_action_pressed("mouse1"):
+		# Moving buildings
 		if $"%buildings_edit_mode".selected == 1:
-			if drag_delay < 0.0:
+			if drag_delay < 0.0 && !dragging:
 				dragging = true
 				var position = get_viewport().get_mouse_position()
 				var camera = get_viewport().get_camera()
@@ -132,8 +134,8 @@ func check_edit_building():
 				var result = space_state.intersect_ray(start, end, [], 1 << 15, false, true)
 				if result.has("collider"):
 					var proj = result.position
-					if $"%buildings_edit_mode".selected == 1:
-						drag_start = proj
+					drag_start = proj
+				$WorldEditor.editor_command("buildings_checkpoint", [])
 			else:
 				drag_delay -= get_process_delta_time()
 		else: