Index.h

#pragma once
 
#include <cstddef>
 
namespace engine {
 
    inline constexpr size_t index2D(size_t x, size_t y, size_t width) {
        return y * width + x;
    }
 
    inline constexpr size_t index3D(size_t x, size_t y, size_t z, size_t width, size_t height) {
        return z * width * height + y * width + x;
    }
 
    inline constexpr size_t index4D(
        size_t x, size_t y, size_t z, size_t w, size_t width, size_t height, size_t depth
    ) {
        return w * width * height * depth + z * width * height + y * width + x;
    }
}  // namespace engine