From a8b3118e8305fd1c668ea25e07157b625c9747ff Mon Sep 17 00:00:00 2001 From: Joursoir Date: Sat, 10 Apr 2021 17:29:02 +0000 Subject: add glm headers --- src/include/glm/gtx/closest_point.inl | 45 +++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/include/glm/gtx/closest_point.inl (limited to 'src/include/glm/gtx/closest_point.inl') diff --git a/src/include/glm/gtx/closest_point.inl b/src/include/glm/gtx/closest_point.inl new file mode 100644 index 0000000..4c17506 --- /dev/null +++ b/src/include/glm/gtx/closest_point.inl @@ -0,0 +1,45 @@ +/// @ref gtx_closest_point + +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 -- cgit v1.2.3-18-g5258