/usr/include/glm/gtx/matrix_query.inl is in libglm-dev 0.9.5.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// OpenGL Mathematics Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net)
///////////////////////////////////////////////////////////////////////////////////////////////////
// Created : 2007-03-05
// Updated : 2007-03-05
// Licence : This source is under MIT License
// File : glm/gtx/matrix_query.inl
///////////////////////////////////////////////////////////////////////////////////////////////////
// Dependency:
// - GLM core
///////////////////////////////////////////////////////////////////////////////////////////////////
namespace glm
{
template<typename T, precision P>
GLM_FUNC_QUALIFIER bool isNull
(
detail::tmat2x2<T, P> const & m,
T const & epsilon)
{
bool result = true;
for(length_t i = 0; result && i < 2 ; ++i)
result = isNull(m[i], epsilon);
return result;
}
template<typename T, precision P>
GLM_FUNC_QUALIFIER bool isNull
(
detail::tmat3x3<T, P> const & m,
T const & epsilon
)
{
bool result = true;
for(length_t i = 0; result && i < 3 ; ++i)
result = isNull(m[i], epsilon);
return result;
}
template<typename T, precision P>
GLM_FUNC_QUALIFIER bool isNull
(
detail::tmat4x4<T, P> const & m,
T const & epsilon
)
{
bool result = true;
for(length_t i = 0; result && i < 4 ; ++i)
result = isNull(m[i], epsilon);
return result;
}
template<typename T, precision P, template <typename, precision> class matType>
GLM_FUNC_QUALIFIER bool isIdentity
(
matType<T, P> const & m,
T const & epsilon
)
{
bool result = true;
for(length_t i(0); result && i < m[0].length(); ++i)
{
for(length_t j(0); result && j < i ; ++j)
result = abs(m[i][j]) <= epsilon;
if(result)
result = abs(m[i][i] - 1) <= epsilon;
for(length_t j(i + 1); result && j < m.length(); ++j)
result = abs(m[i][j]) <= epsilon;
}
return result;
}
template<typename T, precision P>
GLM_FUNC_QUALIFIER bool isNormalized
(
detail::tmat2x2<T, P> const & m,
T const & epsilon
)
{
bool result(true);
for(length_t i(0); result && i < m.length(); ++i)
result = isNormalized(m[i], epsilon);
for(length_t i(0); result && i < m.length(); ++i)
{
typename detail::tmat2x2<T, P>::col_type v;
for(length_t j(0); j < m.length(); ++j)
v[j] = m[j][i];
result = isNormalized(v, epsilon);
}
return result;
}
template<typename T, precision P>
GLM_FUNC_QUALIFIER bool isNormalized
(
detail::tmat3x3<T, P> const & m,
T const & epsilon
)
{
bool result(true);
for(length_t i(0); result && i < m.length(); ++i)
result = isNormalized(m[i], epsilon);
for(length_t i(0); result && i < m.length(); ++i)
{
typename detail::tmat3x3<T, P>::col_type v;
for(length_t j(0); j < m.length(); ++j)
v[j] = m[j][i];
result = isNormalized(v, epsilon);
}
return result;
}
template<typename T, precision P>
GLM_FUNC_QUALIFIER bool isNormalized
(
detail::tmat4x4<T, P> const & m,
T const & epsilon
)
{
bool result(true);
for(length_t i(0); result && i < m.length(); ++i)
result = isNormalized(m[i], epsilon);
for(length_t i(0); result && i < m.length(); ++i)
{
typename detail::tmat4x4<T, P>::col_type v;
for(length_t j(0); j < m.length(); ++j)
v[j] = m[j][i];
result = isNormalized(v, epsilon);
}
return result;
}
template<typename T, precision P, template <typename, precision> class matType>
GLM_FUNC_QUALIFIER bool isOrthogonal
(
matType<T, P> const & m,
T const & epsilon
)
{
bool result(true);
for(length_t i(0); result && i < m.length() - 1; ++i)
for(length_t j(i + 1); result && j < m.length(); ++j)
result = areOrthogonal(m[i], m[j], epsilon);
if(result)
{
matType<T, P> tmp = transpose(m);
for(length_t i(0); result && i < m.length() - 1 ; ++i)
for(length_t j(i + 1); result && j < m.length(); ++j)
result = areOrthogonal(tmp[i], tmp[j], epsilon);
}
return result;
}
}//namespace glm
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