248 lines
8.2 KiB
Text
248 lines
8.2 KiB
Text
|
/// @ref core
|
||
|
|
/// @file glm/detail/func_geometric.inl
|
||
|
|
|
||
|
|
#include "func_exponential.hpp"
|
||
|
|
#include "func_common.hpp"
|
||
|
|
#include "type_vec2.hpp"
|
||
|
|
#include "type_vec4.hpp"
|
||
|
|
#include "type_float.hpp"
|
||
|
|
|
||
|
|
namespace glm{
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
template <template <typename, precision> class vecType, typename T, precision P, bool Aligned>
|
||
|
|
struct compute_length
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static T call(vecType<T, P> const & v)
|
||
|
|
{
|
||
|
|
return sqrt(dot(v, v));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <template <typename, precision> class vecType, typename T, precision P, bool Aligned>
|
||
|
|
struct compute_distance
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static T call(vecType<T, P> const & p0, vecType<T, P> const & p1)
|
||
|
|
{
|
||
|
|
return length(p1 - p0);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <template <class, precision> class vecType, typename T, precision P, bool Aligned>
|
||
|
|
struct compute_dot{};
|
||
|
|
|
||
|
|
template <typename T, precision P, bool Aligned>
|
||
|
|
struct compute_dot<tvec1, T, P, Aligned>
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static T call(tvec1<T, P> const & a, tvec1<T, P> const & b)
|
||
|
|
{
|
||
|
|
return a.x * b.x;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T, precision P, bool Aligned>
|
||
|
|
struct compute_dot<tvec2, T, P, Aligned>
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static T call(tvec2<T, P> const & x, tvec2<T, P> const & y)
|
||
|
|
{
|
||
|
|
tvec2<T, P> tmp(x * y);
|
||
|
|
return tmp.x + tmp.y;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T, precision P, bool Aligned>
|
||
|
|
struct compute_dot<tvec3, T, P, Aligned>
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static T call(tvec3<T, P> const & x, tvec3<T, P> const & y)
|
||
|
|
{
|
||
|
|
tvec3<T, P> tmp(x * y);
|
||
|
|
return tmp.x + tmp.y + tmp.z;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T, precision P, bool Aligned>
|
||
|
|
struct compute_dot<tvec4, T, P, Aligned>
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static T call(tvec4<T, P> const & x, tvec4<T, P> const & y)
|
||
|
|
{
|
||
|
|
tvec4<T, P> tmp(x * y);
|
||
|
|
return (tmp.x + tmp.y) + (tmp.z + tmp.w);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T, precision P, bool Aligned>
|
||
|
|
struct compute_cross
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static tvec3<T, P> call(tvec3<T, P> const & x, tvec3<T, P> const & y)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'cross' accepts only floating-point inputs");
|
||
|
|
|
||
|
|
return tvec3<T, P>(
|
||
|
|
x.y * y.z - y.y * x.z,
|
||
|
|
x.z * y.x - y.z * x.x,
|
||
|
|
x.x * y.y - y.x * x.y);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType, bool Aligned>
|
||
|
|
struct compute_normalize
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & v)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs");
|
||
|
|
|
||
|
|
return v * inversesqrt(dot(v, v));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType, bool Aligned>
|
||
|
|
struct compute_faceforward
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & N, vecType<T, P> const & I, vecType<T, P> const & Nref)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs");
|
||
|
|
|
||
|
|
return dot(Nref, I) < static_cast<T>(0) ? N : -N;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType, bool Aligned>
|
||
|
|
struct compute_reflect
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & I, vecType<T, P> const & N)
|
||
|
|
{
|
||
|
|
return I - N * dot(N, I) * static_cast<T>(2);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType, bool Aligned>
|
||
|
|
struct compute_refract
|
||
|
|
{
|
||
|
|
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & I, vecType<T, P> const & N, T eta)
|
||
|
|
{
|
||
|
|
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<T>(k >= static_cast<T>(0));
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}//namespace detail
|
||
|
|
|
||
|
|
// length
|
||
|
|
template <typename genType>
|
||
|
|
GLM_FUNC_QUALIFIER genType length(genType x)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'length' accepts only floating-point inputs");
|
||
|
|
|
||
|
|
return abs(x);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType>
|
||
|
|
GLM_FUNC_QUALIFIER T length(vecType<T, P> const & v)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'length' accepts only floating-point inputs");
|
||
|
|
|
||
|
|
return detail::compute_length<vecType, T, P, detail::is_aligned<P>::value>::call(v);
|
||
|
|
}
|
||
|
|
|
||
|
|
// distance
|
||
|
|
template <typename genType>
|
||
|
|
GLM_FUNC_QUALIFIER genType distance(genType const & p0, genType const & p1)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'distance' accepts only floating-point inputs");
|
||
|
|
|
||
|
|
return length(p1 - p0);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType>
|
||
|
|
GLM_FUNC_QUALIFIER T distance(vecType<T, P> const & p0, vecType<T, P> const & p1)
|
||
|
|
{
|
||
|
|
return detail::compute_distance<vecType, T, P, detail::is_aligned<P>::value>::call(p0, p1);
|
||
|
|
}
|
||
|
|
|
||
|
|
// dot
|
||
|
|
template <typename T>
|
||
|
|
GLM_FUNC_QUALIFIER T dot(T x, T y)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'dot' accepts only floating-point inputs");
|
||
|
|
return x * y;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType>
|
||
|
|
GLM_FUNC_QUALIFIER T dot(vecType<T, P> const & x, vecType<T, P> const & y)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'dot' accepts only floating-point inputs");
|
||
|
|
return detail::compute_dot<vecType, T, P, detail::is_aligned<P>::value>::call(x, y);
|
||
|
|
}
|
||
|
|
|
||
|
|
// cross
|
||
|
|
template <typename T, precision P>
|
||
|
|
GLM_FUNC_QUALIFIER tvec3<T, P> cross(tvec3<T, P> const & x, tvec3<T, P> const & y)
|
||
|
|
{
|
||
|
|
return detail::compute_cross<T, P, detail::is_aligned<P>::value>::call(x, y);
|
||
|
|
}
|
||
|
|
|
||
|
|
// normalize
|
||
|
|
template <typename genType>
|
||
|
|
GLM_FUNC_QUALIFIER genType normalize(genType const & x)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'normalize' accepts only floating-point inputs");
|
||
|
|
|
||
|
|
return x < genType(0) ? genType(-1) : genType(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType>
|
||
|
|
GLM_FUNC_QUALIFIER vecType<T, P> normalize(vecType<T, P> const & x)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'normalize' accepts only floating-point inputs");
|
||
|
|
|
||
|
|
return detail::compute_normalize<T, P, vecType, detail::is_aligned<P>::value>::call(x);
|
||
|
|
}
|
||
|
|
|
||
|
|
// faceforward
|
||
|
|
template <typename genType>
|
||
|
|
GLM_FUNC_QUALIFIER genType faceforward(genType const & N, genType const & I, genType const & Nref)
|
||
|
|
{
|
||
|
|
return dot(Nref, I) < static_cast<genType>(0) ? N : -N;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType>
|
||
|
|
GLM_FUNC_QUALIFIER vecType<T, P> faceforward(vecType<T, P> const & N, vecType<T, P> const & I, vecType<T, P> const & Nref)
|
||
|
|
{
|
||
|
|
return detail::compute_faceforward<T, P, vecType, detail::is_aligned<P>::value>::call(N, I, Nref);
|
||
|
|
}
|
||
|
|
|
||
|
|
// reflect
|
||
|
|
template <typename genType>
|
||
|
|
GLM_FUNC_QUALIFIER genType reflect(genType const & I, genType const & N)
|
||
|
|
{
|
||
|
|
return I - N * dot(N, I) * genType(2);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename T, precision P, template <typename, precision> class vecType>
|
||
|
|
GLM_FUNC_QUALIFIER vecType<T, P> reflect(vecType<T, P> const & I, vecType<T, P> const & N)
|
||
|
|
{
|
||
|
|
return detail::compute_reflect<T, P, vecType, detail::is_aligned<P>::value>::call(I, N);
|
||
|
|
}
|
||
|
|
|
||
|
|
// refract
|
||
|
|
template <typename genType>
|
||
|
|
GLM_FUNC_QUALIFIER genType refract(genType const & I, genType const & N, genType eta)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'refract' accepts only floating-point inputs");
|
||
|
|
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>
|
||
|
|
GLM_FUNC_QUALIFIER vecType<T, P> refract(vecType<T, P> const & I, vecType<T, P> const & N, T eta)
|
||
|
|
{
|
||
|
|
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'refract' accepts only floating-point inputs");
|
||
|
|
return detail::compute_refract<T, P, vecType, detail::is_aligned<P>::value>::call(I, N, eta);
|
||
|
|
}
|
||
|
|
}//namespace glm
|
||
|
|
|
||
|
|
#if GLM_ARCH != GLM_ARCH_PURE && GLM_HAS_UNRESTRICTED_UNIONS
|
||
|
|
# include "func_geometric_simd.inl"
|
||
|
|
#endif
|