mirror of https://github.com/axmolengine/axmol.git
37 lines
958 B
C
37 lines
958 B
C
|
#ifndef COMMON_ALNUMBERS_H
|
||
|
|
#define COMMON_ALNUMBERS_H
|
||
|
|
|
||
|
|
#include <utility>
|
||
|
|
|
||
|
|
namespace al {
|
||
|
|
|
||
|
|
namespace numbers {
|
||
|
|
|
||
|
|
namespace detail_ {
|
||
|
|
template<typename T>
|
||
|
|
using as_fp = std::enable_if_t<std::is_floating_point<T>::value, T>;
|
||
|
|
} // detail_
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
inline constexpr auto pi_v = detail_::as_fp<T>(3.141592653589793238462643383279502884L);
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
inline constexpr auto inv_pi_v = detail_::as_fp<T>(0.318309886183790671537767526745028724L);
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
inline constexpr auto sqrt2_v = detail_::as_fp<T>(1.414213562373095048801688724209698079L);
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
inline constexpr auto sqrt3_v = detail_::as_fp<T>(1.732050807568877293527446341505872367L);
|
||
|
|
|
||
|
|
inline constexpr auto pi = pi_v<double>;
|
||
|
|
inline constexpr auto inv_pi = inv_pi_v<double>;
|
||
|
|
inline constexpr auto sqrt2 = sqrt2_v<double>;
|
||
|
|
inline constexpr auto sqrt3 = sqrt3_v<double>;
|
||
|
|
|
||
|
|
} // namespace numbers
|
||
|
|
|
||
|
|
} // namespace al
|
||
|
|
|
||
|
|
#endif /* COMMON_ALNUMBERS_H */
|