point2d.h

#ifndef POINT2D_H

#define POINT2D_H

#include <cmath>

struct Point2D
{
        Point2D()                                                                                                       { }
        Point2D(double x0, double y0)                                                           { x = x0; y = y0; }

        double getDistanceTo(Point2D p) const;
        double getSquaredDistanceTo(Point2D p) const;

        double x, y;
};

inline double Point2D::getDistanceTo(Point2D p) const
{
        return std::sqrt(getSquaredDistanceTo(p));
}

inline double Point2D::getSquaredDistanceTo(Point2D p) const
{
        double dx = p.x - x;
        double dy = p.y - y;
        return dx*dx + dy*dy;
}

#endif // POINT2D_H