#ifndef LINE_H_
#define LINE_H_

#include "Vertex.h"
#include <math.h>


#define INTERSECTION_ERROR           -1
#define INTERSECTION_NONE             0
#define INTERSECTION_IDENTICAL        1
#define INTERSECTION_LINE             2
#define INTERSECTION_LINE_LINE        2
#define INTERSECTION_LINE_SEGMENT     3
#define INTERSECTION_SEGMENT_LINE     6
#define INTERSECTION_SEGMENT_SEGMENT  7

class Line {
  private:
    Vertex v1, v2;
  public:
    Line() {}
    Line(const Vertex& vertex1, const Vertex& vertex2) :
      v1(vertex1), v2(vertex2) {}
    Line(float x1, float y1, float x2, float y2) :
      v1(x1, y1), v2(x2, y2) {}
    
    Vertex &getVertex1() {return v1;}
    const Vertex &getVertex1() const {return v1;}
    void setVertex1(const Vertex &v) {v1 = v;}
    
    Vertex &getVertex2() {return v2;}
    const Vertex &getVertex2() const {return v2;}
    void setVertex2(const Vertex &v) {v2 = v;}
    
    float lengthSq() const {return v1.distanceSq(v2);}
    float length() const {return sqrtf(lengthSq());}
    
    bool contains(const Vertex &v) const;
    
    int intersects(const Line &l, Vertex *v) const;
};


#endif /*LINE_H_*/