private:
void SetupVAO(int which, GLuint element_buffer, int vertex_count) noexcept;
void FillElementBuffer(GLuint which, int tile_width, int tile_depth);
private:
void SetupVAO(int which, GLuint element_buffer, int vertex_count) noexcept;
void FillElementBuffer(GLuint which, int tile_width, int tile_depth);