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 3.14159265358979323846f; }
  21     static constexpr inline float Tau() noexcept { return 3.14159265358979323846f * 2.0f; }
  22     static constexpr inline float Sqrt3() noexcept { return 1.73205080756887719318f; }
  23 };
  24
  25 template<>
  26 struct MathDefs<double> {
  27     static constexpr inline double Pi() noexcept { return 3.14159265358979323846; }
  28     static constexpr inline double Tau() noexcept { return 3.14159265358979323846 * 2.0; }
  29     static constexpr inline double Sqrt3() noexcept { return 1.73205080756887719318; }
  30 };
  31
  32 } // namespace al
  33
  34 #endif /* AL_MATH_DEFS_H */