King_DuckZ/Sprout
1
0
Fork 0
mirror of https://github.com/bolero-MURAKAMI/Sprout synced 2025-08-03 12:49:50 +00:00
Code Issues Releases Wiki Activity

fix math functions

Browse source
This commit is contained in:
bolero-MURAKAMI 2013-04-29 10:56:46 +09:00
parent 2e2b6c96ab
commit ffb876c930
23 changed files with 85 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

15
sprout/math/atan2.hpp
View file

@ -7,6 +7,8 @@
#include <sprout/math/detail/config.hpp>
#include <sprout/math/detail/float_compute.hpp>
#include <sprout/math/constants.hpp>
#include <sprout/math/isnan.hpp>
#include <sprout/math/signbit.hpp>
#include <sprout/math/copysign.hpp>
#include <sprout/math/signbit.hpp>
#include <sprout/math/atan.hpp>
@ -33,7 +35,13 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
atan2(FloatType y, FloatType x) {
return x == -std::numeric_limits<FloatType>::infinity()
return sprout::math::isnan(y)
? sprout::math::isnan(x)
? sprout::math::signbit(y) && sprout::math::signbit(x) ? -std::numeric_limits<double>::quiet_NaN()
: std::numeric_limits<double>::quiet_NaN()
: y
: sprout::math::isnan(x) ? x
: 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>()
: sprout::math::copysign(sprout::math::pi<FloatType>(), y)
@ -77,11 +85,14 @@ namespace sprout {
}
} // namespace detail
//
// bug:
// issue:
// [ !SPROUT_USE_BUILTIN_CMATH_FUNCTION ]
// atan2(<28>}0, -0) returns <20>}ƒÎ .
// # returns <20>}0 . ( same as atan2(<28>}0, +0) )
// atan2(-0, x) returns -ƒÎ for x < 0.
// # returns +ƒÎ . ( same as atan2(+0, x) )
// atan2(-NaN, -NaN) returns -NaN .
// # returns +NaN . ( same as atan2(+NaN, +NaN) )
//
using sprout::math::detail::atan2;
} // namespace math