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fix math functions

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This commit is contained in:
bolero-MURAKAMI 2013-02-14 18:02:43 +09:00
parent 5d809ef5c9
commit fa1d769bdf
76 changed files with 582 additions and 169 deletions
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19
sprout/math/atan2.hpp
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@ -1,6 +1,7 @@
#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>
@ -18,8 +19,22 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
atan2(FloatType y, FloatType x) {
return x < 0
? sprout::math::atan(y / x) + (y < 0 ? -1 : 1) * sprout::math::pi<FloatType>()
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::math::atan(y / x) + (y < 0 ? -1 : 1) * sprout::math::pi<FloatType>()
: sprout::math::atan(y / x)
;
}