Method xy2theta

include/patchwork.hpp:528–539

template<typename PointT>
inline
double PatchWork<PointT>::xy2theta(const double &x, const double &y) { // 0 ~ 2 * PI
    /*
      if (y >= 0) {
          return atan2(y, x); // 1, 2 quadrant
      } else {
          return 2 * M_PI + atan2(y, x);// 3, 4 quadrant
      }
    */
    auto atan_value = atan2(y,x); // EDITED!
    return atan_value > 0 ? atan_value : atan_value + 2*M_PI; // EDITED!
}

template<typename PointT>
inline