common/math_defs.h

   1 #ifndef AL_MATH_DEFS_H
   2 #define AL_MATH_DEFS_H
   3
   4 #include <math.h>
   5
   6 #ifndef M_PI
   7 #define M_PI 3.14159265358979323846
   8 #endif
   9
  10 constexpr inline float Deg2Rad(float x) noexcept { return x * static_cast<float>(M_PI/180.0); }
  11 constexpr inline float Rad2Deg(float x) noexcept { return x * static_cast<float>(180.0/M_PI); }
  12
  13 namespace al {
  14
  15 template<typename Real>
  16 struct MathDefs { };
  17
  18 template<>
  19 struct MathDefs<float> {
  20     static constexpr inline float Pi() noexcept { return static_cast<float>(M_PI); }
  21     static constexpr inline float Tau() noexcept { return static_cast<float>(M_PI * 2.0); }
  22 };
  23
  24 template<>
  25 struct MathDefs<double> {
  26     static constexpr inline double Pi() noexcept { return M_PI; }
  27     static constexpr inline double Tau() noexcept { return M_PI * 2.0; }
  28 };
  29
  30 } // namespace al
  31
  32 #endif /* AL_MATH_DEFS_H */