1/// @ref gtx_closest_point
2/// @file glm/gtx/closest_point.inl
3
4namespace glm
5{
6	template <typename T, precision P>
7	GLM_FUNC_QUALIFIER tvec3<T, P> closestPointOnLine
8	(
9		tvec3<T, P> const & point,
10		tvec3<T, P> const & a,
11		tvec3<T, P> const & b
12	)
13	{
14		T LineLength = distance(a, b);
15		tvec3<T, P> Vector = point - a;
16		tvec3<T, P> LineDirection = (b - a) / LineLength;
17
18		// Project Vector to LineDirection to get the distance of point from a
19		T Distance = dot(Vector, LineDirection);
20
21		if(Distance <= T(0)) return a;
22		if(Distance >= LineLength) return b;
23		return a + LineDirection * Distance;
24	}
25
26	template <typename T, precision P>
27	GLM_FUNC_QUALIFIER tvec2<T, P> closestPointOnLine
28	(
29		tvec2<T, P> const & point,
30		tvec2<T, P> const & a,
31		tvec2<T, P> const & b
32	)
33	{
34		T LineLength = distance(a, b);
35		tvec2<T, P> Vector = point - a;
36		tvec2<T, P> LineDirection = (b - a) / LineLength;
37
38		// Project Vector to LineDirection to get the distance of point from a
39		T Distance = dot(Vector, LineDirection);
40
41		if(Distance <= T(0)) return a;
42		if(Distance >= LineLength) return b;
43		return a + LineDirection * Distance;
44	}
45
46}//namespace glm
47