polygon.h

#pragma once
 
#include <vector>
 
#include "software/geom/segment.h"
#include "software/geom/shape.h"
 
class Polygon : public virtual Shape
{
   public:
    Polygon() = delete;
    explicit Polygon(const std::vector<Point>& points);
 
    explicit Polygon(const std::initializer_list<Point>& points);
 
    Point centroid() const;
 
    Polygon expand(double expansion_amount) const;
 
    double perimeter() const;
 
    const std::vector<Segment>& getSegments() const;
 
    const std::vector<Point>& getPoints() const;
 
    static Polygon fromSegment(const Segment& segment, double length_radius,
                               double width_radius);
    static Polygon fromSegment(const Segment& segment, double radius);
 
   protected:
    void initSegments();
 
    std::vector<Point> points_;
    std::vector<Segment> segments_;
};
 
bool operator==(const Polygon& poly1, const Polygon& poly2);
 
bool operator!=(const Polygon& poly1, const Polygon& poly2);
 
std::ostream& operator<<(std::ostream& os, const Polygon& poly);