Line data    Source code

       1              : /**
       2              :  * @file
       3              :  * @brief   Conversions between radians and degrees.
       4              :  */
       5              : #pragma once
       6              : 
       7              : #include <AH/STL/type_traits>
       8              : #include <AH/Settings/NamespaceSettings.hpp>
       9              : 
      10              : BEGIN_AH_NAMESPACE
      11              : 
      12              : namespace detail {
      13              : constexpr long double pi_inv_l = 0.318309886183790671537767526745028724L;
      14              : constexpr long double pi_l = 3.141592653589793238462643383279502884L;
      15              : } // namespace detail
      16              : 
      17              : /// @addtogroup AH_Math
      18              : /// @{
      19              : 
      20              : /// Convert radians to degrees.
      21              : template <class T>
      22              : constexpr inline
      23              :     typename std::enable_if<std::is_floating_point<T>::value, T>::type
      24            4 :     rad2deg(T r) {
      25            4 :     return r * static_cast<T>(detail::pi_inv_l) * 180;
      26              : }
      27              : /// Convert degrees to radians.
      28              : template <class T>
      29              : constexpr inline
      30              :     typename std::enable_if<std::is_floating_point<T>::value, T>::type
      31       499718 :     deg2rad(T d) {
      32       499718 :     return d * static_cast<T>(detail::pi_l) / 180;
      33              : }
      34              : 
      35              : /// Convert degrees to radians, e.g. 10_deg.
      36            1 : constexpr long double operator"" _deg(long double deg) { return deg2rad(deg); }
      37              : /// Convert degrees to radians, e.g. 10_deg.
      38       499714 : constexpr long double operator"" _deg(unsigned long long deg) {
      39       499714 :     return deg2rad(static_cast<long double>(deg));
      40              : }
      41              : 
      42              : /// @}
      43              : 
      44              : END_AH_NAMESPACE