1 files changed, 9 insertions, 0 deletions
diff --git a/src/game/shared/world/ray_dda.hh b/src/game/shared/world/ray_dda.hh
index 72f746e..c3cbb09 100644
--- a/src/game/shared/world/ray_dda.hh
+++ b/src/game/shared/world/ray_dda.hh
@@ -1,3 +1,10 @@
+// SPDX-License-Identifier: BSD-2-Clause
+// Copyright (c) 2025 Kirill Dmitrievich
+// File: ray_dda.hh
+// Description: Fast voxel grid traversal with an arbitrary starting position
+
+#ifndef SHARED_WORLD_RAY_DDA_HH
+#define SHARED_WORLD_RAY_DDA_HH
 #pragma once
 
 #include "shared/types.hh"
@@ -30,3 +37,5 @@ public:
     voxel_pos vnormal;
     voxel_pos vpos;
 };
+
+#endif