/// @ref gtx_closest_point /// @file glm/gtx/closest_point.inl namespace glm { template GLM_FUNC_QUALIFIER vec<3, T, Q> closestPointOnLine ( vec<3, T, Q> const& point, vec<3, T, Q> const& a, vec<3, T, Q> const& b ) { T LineLength = distance(a, b); vec<3, T, Q> Vector = point - a; vec<3, T, Q> 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; } template GLM_FUNC_QUALIFIER vec<2, T, Q> closestPointOnLine ( vec<2, T, Q> const& point, vec<2, T, Q> const& a, vec<2, T, Q> const& b ) { T LineLength = distance(a, b); vec<2, T, Q> Vector = point - a; vec<2, T, Q> 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