linesegment2d.h

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#ifndef LINESEGMENT2D_H
#define LINESEGMENT2D_H

#include "tuw_geometry/line2d.h"

namespace tuw {

class LineSegment2D; 
using LineSegment2DPtr = std::shared_ptr< LineSegment2D > ;
using LineSegment2DConstPtr = std::shared_ptr< LineSegment2D const>;

class LineSegment2D : public Line2D {
protected:
    Point2D p0_, p1_;  
public:
    LineSegment2D();
    LineSegment2D ( const LineSegment2D &l );
    LineSegment2D ( const Point2D &p0, const Point2D &p1 );
    LineSegment2D ( const double &x0, const double &y0, const double &x1, const double &y1 );
    const double &x0() const;
    const double &y0() const;
    const double &x1() const;
    const double &y1() const;
    double angle() const;
    const Point2D &p0() const;
    const Point2D &p1() const;
    Point2D pc() const;
    const Line2D &line() const;
    const double length() const;
    bool operator == ( const LineSegment2D& o ) const;
    LineSegment2D& set ( const double &x0, const double &y0, const double &x1, const double &y1 );
    LineSegment2D& set ( const Point2D &p0, const Point2D &p1 );
    double distanceTo ( const Point2D &p, double &dx, double &dy ) const;
    double distanceSqrTo ( const Point2D &p, double &dx, double &dy ) const;
    
    double closestPointLineSegmentRatio(const Point2D& p) const;
    Point2D closestPointTo(const Point2D& p) const;
    double distanceTo ( const Point2D &p ) const;
    friend std::ostream &operator << ( std::ostream &os, const LineSegment2D &o ) {
        os << "[[" << o.x0() <<  ", " << o.y0() << "], [" << o.x1() << ", " << o.y1() << "] ]";
        return os;
    };
};

};
#endif // LINESEGMENT2D_H