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| author | Joursoir <chat@joursoir.net> | 2021-04-10 17:29:02 +0000 |
|---|---|---|
| committer | Joursoir <chat@joursoir.net> | 2021-04-10 17:29:02 +0000 |
| commit | a8b3118e8305fd1c668ea25e07157b625c9747ff (patch) | |
| tree | 69aeec3c40e123443675da381774ef656a2c86e0 /src/include/glm/gtx/closest_point.inl | |
| parent | 887314d01046ed2c00db3eb7b4b227f070501aa1 (diff) | |
| download | space-simulator-a8b3118e8305fd1c668ea25e07157b625c9747ff.tar.gz space-simulator-a8b3118e8305fd1c668ea25e07157b625c9747ff.tar.bz2 space-simulator-a8b3118e8305fd1c668ea25e07157b625c9747ff.zip | |
add glm headers
Diffstat (limited to 'src/include/glm/gtx/closest_point.inl')
| -rw-r--r-- | src/include/glm/gtx/closest_point.inl | 45 |
1 files changed, 45 insertions, 0 deletions
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<typename T, qualifier Q>
+ 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<typename T, qualifier Q>
+ 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
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