a

1 files changed, 2 insertions, 2 deletions

diff --git a/shaders/tile-shader.hpp b/shaders/tile-shader.hpp
index 27126964..d58893d1 100644
--- a/shaders/tile-shader.hpp
+++ b/shaders/tile-shader.hpp
@@ -21,7 +21,7 @@ struct tile_shader : GL::AbstractShaderProgram
     Vector2 camera_offset() const { return camera_offset_; }
     tile_shader& set_camera_offset(Vector2 camera_offset);
 
-    static inline Vector2 project(Vector3 pt);
+    static constexpr Vector2 project(Vector3 pt);
 
 private:
     Vector2 scale_, camera_offset_;
@@ -29,7 +29,7 @@ private:
     enum { ScaleUniform = 0, OffsetUniform = 1, };
 };
 
-Vector2 tile_shader::project(Vector3 pt)
+constexpr Vector2 tile_shader::project(const Vector3 pt)
 {
     float x = pt[1], y = pt[0], z = pt[2];
     return { x-y, (x+y+z*2)*.75f };