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/// @ref gtx_closest_point
/// @file glm/gtx/closest_point.inl
namespace glm
{
template <typename T, precision P>
GLM_FUNC_QUALIFIER tvec3<T, P> closestPointOnLine
(
tvec3<T, P> const & point,
tvec3<T, P> const & a,
tvec3<T, P> const & b
)
{
T LineLength = distance(a, b);
tvec3<T, P> Vector = point - a;
tvec3<T, P> 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, precision P>
GLM_FUNC_QUALIFIER tvec2<T, P> closestPointOnLine
(
tvec2<T, P> const & point,
tvec2<T, P> const & a,
tvec2<T, P> const & b
)
{
T LineLength = distance(a, b);
tvec2<T, P> Vector = point - a;
tvec2<T, P> 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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