You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
39 lines
1.3 KiB
39 lines
1.3 KiB
/////////////////////////////////////////////////////////////////////////////////////////////////// |
|
// OpenGL Mathematics Copyright (c) 2005 - 2011 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{ |
|
namespace gtx{ |
|
|
|
template <typename valType> |
|
GLM_FUNC_QUALIFIER detail::tvec3<valType> closestPointOnLine |
|
( |
|
detail::tvec3<valType> const & point, |
|
detail::tvec3<valType> const & a, |
|
detail::tvec3<valType> const & b |
|
) |
|
{ |
|
valType LineLength = distance(a, b); |
|
detail::tvec3<valType> Vector = point - a; |
|
detail::tvec3<valType> LineDirection = (b - a) / LineLength; |
|
|
|
// Project Vector to LineDirection to get the distance of point from a |
|
valType Distance = dot(Vector, LineDirection); |
|
|
|
if(Distance <= valType(0)) return a; |
|
if(Distance >= LineLength) return b; |
|
return a + LineDirection * Distance; |
|
} |
|
|
|
}//namespace gtx |
|
}//namespace glm |
|
|
|
#endif//glm_gtx_closest_point
|
|
|