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46 lines
1.1 KiB
46 lines
1.1 KiB
/// @ref gtx_closest_point |
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/// @file glm/gtx/closest_point.inl |
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namespace glm |
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{ |
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template<typename T, precision P> |
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GLM_FUNC_QUALIFIER vec<3, T, P> closestPointOnLine |
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( |
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vec<3, T, P> const & point, |
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vec<3, T, P> const & a, |
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vec<3, T, P> const & b |
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) |
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{ |
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T LineLength = distance(a, b); |
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vec<3, T, P> Vector = point - a; |
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vec<3, T, P> LineDirection = (b - a) / LineLength; |
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// Project Vector to LineDirection to get the distance of point from a |
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T Distance = dot(Vector, LineDirection); |
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if(Distance <= T(0)) return a; |
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if(Distance >= LineLength) return b; |
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return a + LineDirection * Distance; |
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} |
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template<typename T, precision P> |
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GLM_FUNC_QUALIFIER vec<2, T, P> closestPointOnLine |
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( |
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vec<2, T, P> const & point, |
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vec<2, T, P> const & a, |
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vec<2, T, P> const & b |
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) |
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{ |
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T LineLength = distance(a, b); |
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vec<2, T, P> Vector = point - a; |
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vec<2, T, P> LineDirection = (b - a) / LineLength; |
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// Project Vector to LineDirection to get the distance of point from a |
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T Distance = dot(Vector, LineDirection); |
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if(Distance <= T(0)) return a; |
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if(Distance >= LineLength) return b; |
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return a + LineDirection * Distance; |
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} |
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}//namespace glm
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