mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-14 10:39:05 +00:00
62 lines
2.4 KiB
C++
62 lines
2.4 KiB
C++
#ifndef SPROUT_MATH_ATAN2_HPP
|
|
#define SPROUT_MATH_ATAN2_HPP
|
|
|
|
#include <limits>
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/math/detail/config.hpp>
|
|
#include <sprout/math/atan.hpp>
|
|
#include <sprout/math/constants.hpp>
|
|
#include <sprout/type_traits/float_promote.hpp>
|
|
#include <sprout/type_traits/enabler_if.hpp>
|
|
|
|
namespace sprout {
|
|
namespace math {
|
|
namespace detail {
|
|
template<
|
|
typename FloatType,
|
|
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR FloatType
|
|
atan2(FloatType y, FloatType x) {
|
|
return y == 0
|
|
? x == 0 ? FloatType(0)
|
|
: x < 0 ? sprout::math::pi<FloatType>()
|
|
: FloatType(0)
|
|
: x == 0 ? (y < 0 ? -1 : 1) * sprout::math::half_pi<FloatType>()
|
|
: x == -std::numeric_limits<FloatType>::infinity()
|
|
? y == std::numeric_limits<FloatType>::infinity() ? sprout::math::three_quarters_pi<FloatType>()
|
|
: y == -std::numeric_limits<FloatType>::infinity() ? -sprout::math::three_quarters_pi<FloatType>()
|
|
: (y < 0 ? -1 : 1) * sprout::math::half_pi<FloatType>()
|
|
: x == std::numeric_limits<FloatType>::infinity()
|
|
? y == std::numeric_limits<FloatType>::infinity() ? sprout::math::quarter_pi<FloatType>()
|
|
: y == -std::numeric_limits<FloatType>::infinity() ? -sprout::math::quarter_pi<FloatType>()
|
|
: FloatType(0)
|
|
: y == std::numeric_limits<FloatType>::infinity() ? sprout::math::half_pi<FloatType>()
|
|
: y == -std::numeric_limits<FloatType>::infinity() ? -sprout::math::half_pi<FloatType>()
|
|
: x < 0 ? sprout::atan(y / x) + (y < 0 ? -1 : 1) * sprout::math::pi<FloatType>()
|
|
: sprout::atan(y / x)
|
|
;
|
|
}
|
|
|
|
template<
|
|
typename ArithmeticType1,
|
|
typename ArithmeticType2,
|
|
typename sprout::enabler_if<
|
|
std::is_arithmetic<ArithmeticType1>::value && std::is_arithmetic<ArithmeticType2>::value
|
|
>::type = sprout::enabler
|
|
>
|
|
inline SPROUT_CONSTEXPR typename sprout::float_promote<ArithmeticType1, ArithmeticType2>::type
|
|
atan2(ArithmeticType1 y, ArithmeticType2 x) {
|
|
typedef typename sprout::float_promote<ArithmeticType1, ArithmeticType2>::type type;
|
|
return sprout::math::detail::atan2(static_cast<type>(y), static_cast<type>(x));
|
|
}
|
|
} // namespace detail
|
|
|
|
using NS_SPROUT_MATH_DETAIL::atan2;
|
|
} // namespace math
|
|
|
|
using sprout::math::atan2;
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_MATH_ATAN2_HPP
|