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#pragma once
/// \file
/// \brief Line data types and related operations.
#include "Vector3.h"
/// \brief A line segment defined by a start point and and end point.
class Line
{
public:
Vector3 start, end;
Line()
{}
Line(const Vector3& start_, const Vector3& end_) :
start(start_),
end(end_)
{}
Vector3 getClosestPoint(const Vector3& point) const
{
Vector3 v = end - start;
Vector3 w = point - start;
double c1 = w.dot(v);
if (c1 <= 0)
{
return start;
}
double c2 = v.dot(v);
if (c2 <= c1)
{
return end;
}
return Vector3(start + v * (c1 / c2));
}
};
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