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Branch free refract and reflect

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This commit is contained in:
Christophe Riccio 2014-11-22 00:37:08 +01:00
parent 582ea579a3
commit 20bdab33dd
2 changed files with 50 additions and 50 deletions
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16
glm/detail/func_common.inl
View File

@ -200,8 +200,6 @@ namespace detail
"'sign' only accept signed inputs");
return detail::compute_sign<T, P, vecType, std::numeric_limits<T>::is_iec559>::call(x);
//return vecType<T, P>(glm::lessThan(vecType<T, P>(0), x)) - vecType<T, P>(glm::lessThan(x, vecType<T, P>(0)));
}
// floor
@ -506,7 +504,7 @@ namespace detail
{
GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'smoothstep' only accept floating-point inputs");
genType tmp = clamp((x - edge0) / (edge1 - edge0), genType(0), genType(1));
genType const tmp(clamp((x - edge0) / (edge1 - edge0), genType(0), genType(1)));
return tmp * tmp * (genType(3) - genType(2) * tmp);
}
@ -515,7 +513,7 @@ namespace detail
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'smoothstep' only accept floating-point inputs");
vecType<T, P> tmp = clamp((x - edge0) / (edge1 - edge0), static_cast<T>(0), static_cast<T>(1));
vecType<T, P> const tmp(clamp((x - edge0) / (edge1 - edge0), static_cast<T>(0), static_cast<T>(1)));
return tmp * tmp * (static_cast<T>(3) - static_cast<T>(2) * tmp);
}
@ -524,11 +522,14 @@ namespace detail
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'smoothstep' only accept floating-point inputs");
vecType<T, P> tmp = clamp((x - edge0) / (edge1 - edge0), static_cast<T>(0), static_cast<T>(1));
vecType<T, P> const tmp(clamp((x - edge0) / (edge1 - edge0), static_cast<T>(0), static_cast<T>(1)));
return tmp * tmp * (static_cast<T>(3) - static_cast<T>(2) * tmp);
}
// TODO: Not working on MinGW...
# if GLM_HAS_CXX11_STL
usign std::isnan;
# else
template <typename genType>
GLM_FUNC_QUALIFIER bool isnan(genType x)
{
@ -550,6 +551,7 @@ namespace detail
return std::isnan(x);
# endif
}
# endif
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_QUALIFIER vecType<bool, P> isnan(vecType<T, P> const & x)
@ -559,6 +561,9 @@ namespace detail
return detail::functor1<bool, T, P, vecType>::call(isnan, x);
}
# if GLM_HAS_CXX11_STL
using std::isinf;
# else
template <typename genType>
GLM_FUNC_QUALIFIER bool isinf(genType x)
{
@ -581,6 +586,7 @@ namespace detail
return std::isinf(x);
# endif
}
# endif
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_QUALIFIER vecType<bool, P> isinf(vecType<T, P> const & x)

18
glm/detail/func_geometric.inl
View File

@ -174,12 +174,9 @@ namespace detail
{
GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'refract' only accept floating-point inputs");
genType dotValue = dot(N, I);
genType k = static_cast<genType>(1) - eta * eta * (static_cast<genType>(1) - dotValue * dotValue);
if(k < static_cast<genType>(0))
return static_cast<genType>(0);
else
return eta * I - (eta * dotValue + sqrt(k)) * N;
genType const dotValue(dot(N, I));
genType const k(static_cast<genType>(1) - eta * eta * (static_cast<genType>(1) - dotValue * dotValue));
return (eta * I - (eta * dotValue + sqrt(k)) * N) * static_cast<genType>(k >= static_cast<genType>(0));
}
template <typename T, precision P, template <typename, precision> class vecType>
@ -187,11 +184,8 @@ namespace detail
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'refract' only accept floating-point inputs");
T dotValue = dot(N, I);
T k = static_cast<T>(1) - eta * eta * (static_cast<T>(1) - dotValue * dotValue);
if(k < static_cast<T>(0))
return vecType<T, P>(0);
else
return eta * I - (eta * dotValue + std::sqrt(k)) * N;
T const dotValue(dot(N, I));
T const k(static_cast<T>(1) - eta * eta * (static_cast<T>(1) - dotValue * dotValue));
return (eta * I - (eta * dotValue + std::sqrt(k)) * N) * static_cast<genType>(k >= static_cast<genType>(0));
}
}//namespace glm