/usr/include/glm/gtx/closest_point.inl is in libglm-dev 0.9.5.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | ///////////////////////////////////////////////////////////////////////////////////////////////////
// OpenGL Mathematics Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net)
///////////////////////////////////////////////////////////////////////////////////////////////////
// Created : 2005-12-30
// Updated : 2008-10-05
// Licence : This source is under MIT License
// File : glm/gtx/closest_point.inl
///////////////////////////////////////////////////////////////////////////////////////////////////
#ifndef glm_gtx_closest_point
#define glm_gtx_closest_point
namespace glm
{
template <typename T, precision P>
GLM_FUNC_QUALIFIER detail::tvec3<T, P> closestPointOnLine
(
detail::tvec3<T, P> const & point,
detail::tvec3<T, P> const & a,
detail::tvec3<T, P> const & b
)
{
T LineLength = distance(a, b);
detail::tvec3<T, P> Vector = point - a;
detail::tvec3<T, P> LineDirection = (b - a) / LineLength;
// Project Vector to LineDirection to get the distance of point from a
T Distance = dot(Vector, LineDirection);
if(Distance <= T(0)) return a;
if(Distance >= LineLength) return b;
return a + LineDirection * Distance;
}
}//namespace glm
#endif//glm_gtx_closest_point
|