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Add closest-point calculation to SGRay, to replace a vector.h helper.

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This commit is contained in:
James Turner
2010-07-23 13:04:09 +01:00
parent bbd61977f1
commit 7beaf3705e
1 changed files with 6 additions and 0 deletions
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simgear/math/SGRay.hxx
+6
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@@ -47,6 +47,12 @@ public:
SGVec3<T> getNormalizedDirection() const SGVec3<T> getNormalizedDirection() const
{ return normalize(getDirection()); } { return normalize(getDirection()); }
SGVec3<T> getClosestPointTo(const SGVec3<T>& point)
{
SGVec3<T> u(getNormalizedDirection()),
v(point - _origin);
return (dot(u, v) * u) + _origin;
}
private: private:
SGVec3<T> _origin; SGVec3<T> _origin;
SGVec3<T> _direction; SGVec3<T> _direction;