Major refactoring for game objects

resources/start_uni_interior.lua

@@ -2,6 +2,7 @@
 
 lection_is_over = false
 
+player_hold_book = false
 
 function lection_hall_zone001_enter_callback()
 --game_api.start_dialogue("")
@@ -37,13 +38,35 @@ game_api.set_trigger_zone_callbacks("knife_dialog_zone001",
 
 function on_knife_pickup()
 game_api.pickup_item("knife")
+game_api.deactivate_interactive_object("Knife001")
 end
 
-
 function on_book_pickup()
-game_api.pickup_item("book")
+	if not player_hold_book then
+		game_api.pickup_item("book")
+		game_api.deactivate_interactive_object("Book001")
+		player_hold_book = true
+	else
+		game_api.remove_item("book")
+		game_api.activate_interactive_object("Book001")
+		player_hold_book = false
+	end
 end
 
+function on_bookshelf_clicked()
+	if not player_hold_book then
+		game_api.pickup_item("book")
+		game_api.deactivate_interactive_object("Book001")
+		player_hold_book = true
+	else
+		game_api.remove_item("book")
+		game_api.activate_interactive_object("Book001")
+		player_hold_book = false
+	end
+end
+
+
+
 function on_npc_interact(npc_index)
     print("[Lua] NPC interaction! Index: " .. tostring(npc_index))
 	if npc_index == 1 then