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/// @ref gtx_vector_query
/// @file glm/gtx/vector_query.inl
#include <cassert>
namespace glm{
namespace detail
{
template <typename T, precision P, template <typename, precision> class vecType>
struct compute_areCollinear{};
template <typename T, precision P>
struct compute_areCollinear<T, P, tvec2>
{
GLM_FUNC_QUALIFIER static bool call(tvec2<T, P> const & v0, tvec2<T, P> const & v1, T const & epsilon)
{
return length(cross(tvec3<T, P>(v0, static_cast<T>(0)), tvec3<T, P>(v1, static_cast<T>(0)))) < epsilon;
}
};
template <typename T, precision P>
struct compute_areCollinear<T, P, tvec3>
{
GLM_FUNC_QUALIFIER static bool call(tvec3<T, P> const & v0, tvec3<T, P> const & v1, T const & epsilon)
{
return length(cross(v0, v1)) < epsilon;
}
};
template <typename T, precision P>
struct compute_areCollinear<T, P, tvec4>
{
GLM_FUNC_QUALIFIER static bool call(tvec4<T, P> const & v0, tvec4<T, P> const & v1, T const & epsilon)
{
return length(cross(tvec3<T, P>(v0), tvec3<T, P>(v1))) < epsilon;
}
};
template <typename T, precision P, template <typename, precision> class vecType>
struct compute_isCompNull{};
template <typename T, precision P>
struct compute_isCompNull<T, P, tvec2>
{
GLM_FUNC_QUALIFIER static tvec2<bool, P> call(tvec2<T, P> const & v, T const & epsilon)
{
return tvec2<bool, P>(
(abs(v.x) < epsilon),
(abs(v.y) < epsilon));
}
};
template <typename T, precision P>
struct compute_isCompNull<T, P, tvec3>
{
GLM_FUNC_QUALIFIER static tvec3<bool, P> call(tvec3<T, P> const & v, T const & epsilon)
{
return tvec3<bool, P>(
(abs(v.x) < epsilon),
(abs(v.y) < epsilon),
(abs(v.z) < epsilon));
}
};
template <typename T, precision P>
struct compute_isCompNull<T, P, tvec4>
{
GLM_FUNC_QUALIFIER static tvec4<bool, P> call(tvec4<T, P> const & v, T const & epsilon)
{
return tvec4<bool, P>(
(abs(v.x) < epsilon),
(abs(v.y) < epsilon),
(abs(v.z) < epsilon),
(abs(v.w) < epsilon));
}
};
}//namespace detail
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_QUALIFIER bool areCollinear
(
vecType<T, P> const & v0,
vecType<T, P> const & v1,
T const & epsilon
)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'areCollinear' only accept floating-point inputs");
return detail::compute_areCollinear<T, P, vecType>::call(v0, v1, epsilon);
}
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_QUALIFIER bool areOrthogonal
(
vecType<T, P> const & v0,
vecType<T, P> const & v1,
T const & epsilon
)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'areOrthogonal' only accept floating-point inputs");
return abs(dot(v0, v1)) <= max(
static_cast<T>(1),
length(v0)) * max(static_cast<T>(1), length(v1)) * epsilon;
}
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_QUALIFIER bool isNormalized
(
vecType<T, P> const & v,
T const & epsilon
)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'isNormalized' only accept floating-point inputs");
return abs(length(v) - static_cast<T>(1)) <= static_cast<T>(2) * epsilon;
}
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_QUALIFIER bool isNull
(
vecType<T, P> const & v,
T const & epsilon
)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'isNull' only accept floating-point inputs");
return length(v) <= epsilon;
}
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_QUALIFIER vecType<bool, P> isCompNull
(
vecType<T, P> const & v,
T const & epsilon
)
{
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'isCompNull' only accept floating-point inputs");
return detail::compute_isCompNull<T, P, vecType>::call(v, epsilon);
}
template <typename T, precision P>
GLM_FUNC_QUALIFIER tvec2<bool, P> isCompNull
(
tvec2<T, P> const & v,
T const & epsilon)
{
return tvec2<bool, P>(
abs(v.x) < epsilon,
abs(v.y) < epsilon);
}
template <typename T, precision P>
GLM_FUNC_QUALIFIER tvec3<bool, P> isCompNull
(
tvec3<T, P> const & v,
T const & epsilon
)
{
return tvec3<bool, P>(
abs(v.x) < epsilon,
abs(v.y) < epsilon,
abs(v.z) < epsilon);
}
template <typename T, precision P>
GLM_FUNC_QUALIFIER tvec4<bool, P> isCompNull
(
tvec4<T, P> const & v,
T const & epsilon
)
{
return tvec4<bool, P>(
abs(v.x) < epsilon,
abs(v.y) < epsilon,
abs(v.z) < epsilon,
abs(v.w) < epsilon);
}
template <typename T, precision P, template <typename, precision> class vecType>
GLM_FUNC_QUALIFIER bool areOrthonormal
(
vecType<T, P> const & v0,
vecType<T, P> const & v1,
T const & epsilon
)
{
return isNormalized(v0, epsilon) && isNormalized(v1, epsilon) && (abs(dot(v0, v1)) <= epsilon);
}
}//namespace glm
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