Function flip

utils/array_utils.hpp:291–305

* @brief Flip a matrix horizontally or vertically. * @param a The matrix to flip. * @param R The number of rows in the matrix. * @param C The number of columns in the matrix. * @param horizontal Whether to flip horizontally (true) or vertically (false). */

 * @param horizontal Whether to flip horizontally (true) or vertically (false).
 */
inline void flip(float *a, size_t R, size_t C, bool horizontal = true) {
  if (horizontal) {
    for (size_t i = 0; i < R; i++) {
      for (size_t j = 0; j < C / 2; j++) {
        std::swap(a[i * C + j], a[i * C + C - j - 1]);
      }
    }
  } else {
    for (size_t i = 0; i < R / 2; i++) {
      for (size_t j = 0; j < C; j++) {
        std::swap(a[i * C + j], a[(R - i - 1) * C + j]);
      }
    }
  }
}

/**
 * @brief Determine if the values of two arrays are close to each other.