include/marnav/math/constants.hpp

   1 #ifndef MARNAV__MATH__CONSTATNS__HPP
   2 #define MARNAV__MATH__CONSTATNS__HPP
   3
   4 namespace marnav
   5 {
   6 namespace math
   7 {
   8 /// M_PI is not defined by either the C or C++ standard.
   9 /// One solution would be to use `_USE_MATH_DEFINES`,
  10 /// another to define it ourselfs, either as constant or
  11 /// `std::atan(-1.0)*4` or `std::acos(-1.0)`.
  12 ///
  13 /// @todo This should be a variable template (>=C++14)
  14 constexpr double pi = 3.141592653589793238463L;
  15 }
  16 }
  17
  18 #endif