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///////////////////////////////////////////////////////////////////////////////////////////////////
// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
///////////////////////////////////////////////////////////////////////////////////////////////////
// Created : 2007-03-05
// Updated : 2010-02-16
// Licence : This source is under MIT License
// File : glm/gtx/vector_query.inl
///////////////////////////////////////////////////////////////////////////////////////////////////
// Dependency:
// - GLM core
///////////////////////////////////////////////////////////////////////////////////////////////////
#include <cassert>
namespace glm{
namespace gtx{
namespace vector_query
{
template <typename T>
GLM_FUNC_QUALIFIER bool areCollinear
(
detail::tvec2<T> const & v0,
detail::tvec2<T> const & v1,
T const & epsilon
)
{
return length(cross(detail::tvec3<T>(v0, T(0)), detail::tvec3<T>(v1, T(0)))) < epsilon;
}
template <typename T>
GLM_FUNC_QUALIFIER bool areCollinear
(
detail::tvec3<T> const & v0,
detail::tvec3<T> const & v1,
T const & epsilon
)
{
return length(cross(v0, v1)) < epsilon;
}
template <typename T>
GLM_FUNC_QUALIFIER bool areCollinear
(
detail::tvec4<T> const & v0,
detail::tvec4<T> const & v1,
T const & epsilon
)
{
return length(cross(detail::tvec3<T>(v0), detail::tvec3<T>(v1))) < epsilon;
}
template <typename genType>
GLM_FUNC_QUALIFIER bool areOpposite
(
genType const & v0,
genType const & v1,
typename genType::value_type const & epsilon
)
{
assert(isNormalized(v0) && isNormalized(v1));
return((typename genType::value_type(1) + dot(v0, v1)) <= epsilon);
}
template <typename genType>
GLM_FUNC_QUALIFIER bool areOrthogonal
(
genType const & v0,
genType const & v1,
typename genType::value_type const & epsilon
)
{
return abs(dot(v0, v1)) <= max(
typename genType::value_type(1),
length(v0)) * max(
typename genType::value_type(1),
length(v1)) * epsilon;
}
template <typename genType>
GLM_FUNC_QUALIFIER bool isNormalized
(
genType const & v,
typename genType::value_type const & epsilon
)
{
return abs(length(v) - typename genType::value_type(1)) <= typename genType::value_type(2) * epsilon;
}
template <typename genType>
GLM_FUNC_QUALIFIER bool isNull
(
genType const & v,
typename genType::value_type const & epsilon
)
{
return length(v) <= epsilon;
}
template <typename T>
GLM_FUNC_QUALIFIER bool isCompNull
(
T const & s,
T const & epsilon
)
{
return abs(s) < epsilon;
}
template <typename T>
GLM_FUNC_QUALIFIER detail::tvec2<bool> isCompNull
(
detail::tvec2<T> const & v,
T const & epsilon)
{
return detail::tvec2<bool>(
(abs(v.x) < epsilon),
(abs(v.y) < epsilon));
}
template <typename T>
GLM_FUNC_QUALIFIER detail::tvec3<bool> isCompNull
(
detail::tvec3<T> const & v,
T const & epsilon
)
{
return detail::tvec3<bool>(
abs(v.x) < epsilon,
abs(v.y) < epsilon,
abs(v.z) < epsilon);
}
template <typename T>
GLM_FUNC_QUALIFIER detail::tvec4<bool> isCompNull
(
detail::tvec4<T> const & v,
T const & epsilon
)
{
return detail::tvec4<bool>(
abs(v.x) < epsilon,
abs(v.y) < epsilon,
abs(v.z) < epsilon,
abs(v.w) < epsilon);
}
template <typename genType>
GLM_FUNC_QUALIFIER bool areOrthonormal
(
genType const & v0,
genType const & v1,
typename genType::value_type const & epsilon
)
{
return isNormalized(v0, epsilon) && isNormalized(v1, epsilon) && (abs(dot(v0, v1)) <= epsilon);
}
template <typename genType>
GLM_FUNC_QUALIFIER bool areSimilar
(
genType const & v0,
genType const & v1,
typename genType::value_type const & epsilon
)
{
bool similar = true;
for(typename genType::size_type i = 0; similar && i < genType::value_size(); i++)
similar = (abs(v0[i] - v1[i]) <= epsilon);
return similar;
}
}//namespace vector_query
}//namespace gtx
}//namespace glm
|
