#if !defined INCLUDE_UTILITY_CHECKERBOARD
#define INCLUDE_UTILITY_CHECKERBOARD

const ivec2[2] checkerboard_offsets_2x1 = ivec2[2](ivec2(0, 0), ivec2(1, 0));

const ivec2[4] checkerboard_offsets_2x2 =
    ivec2[4](ivec2(0, 0), ivec2(1, 1), ivec2(1, 0), ivec2(0, 1));

const ivec2[8] checkerboard_offsets_4x2 = ivec2[8](
    ivec2(0, 0),
    ivec2(2, 0),
    ivec2(1, 1),
    ivec2(3, 1),
    ivec2(1, 0),
    ivec2(3, 0),
    ivec2(0, 1),
    ivec2(2, 1)
);

const ivec2[9] checkerboard_offsets_3x3 = ivec2[9](
    ivec2(0, 0),
    ivec2(2, 0),
    ivec2(0, 2),
    ivec2(2, 2),
    ivec2(1, 1),
    ivec2(1, 0),
    ivec2(1, 2),
    ivec2(0, 1),
    ivec2(2, 1)
);

const ivec2[16] checkerboard_offsets_4x4 = ivec2[16](
    ivec2(0, 0),
    ivec2(2, 0),
    ivec2(0, 2),
    ivec2(2, 2),
    ivec2(1, 1),
    ivec2(3, 1),
    ivec2(1, 3),
    ivec2(3, 3),
    ivec2(1, 0),
    ivec2(3, 0),
    ivec2(1, 2),
    ivec2(3, 2),
    ivec2(0, 1),
    ivec2(2, 1),
    ivec2(0, 3),
    ivec2(2, 3)
);

#if CLOUDS_TEMPORAL_UPSCALING == 1
#define clouds_checkerboard_offsets ivec2[1](ivec2(0))
#elif CLOUDS_TEMPORAL_UPSCALING == 2
#define clouds_checkerboard_offsets checkerboard_offsets_2x2
#elif CLOUDS_TEMPORAL_UPSCALING == 3
#define clouds_checkerboard_offsets checkerboard_offsets_3x3
#elif CLOUDS_TEMPORAL_UPSCALING == 4
#define clouds_checkerboard_offsets checkerboard_offsets_4x4
#endif

#endif // INCLUDE_UTILITY_CHECKERBOARD