Edge.h

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#ifndef EDGE_CM
#define EDGE_CM
#include "Vector3.h"
#include "CirclePattern.h"

class Vertex;
class Face;

class Edge
{
private:
   double th;
   double cTheta;
   double sTheta;
   double cl2TS;
   double tanHTS;

public:

   // pointers for mesh structure
   Edge * next;
   Edge * pair;
   Vertex * vertex;
   Face * face;

   double alphaOposite;

   bool check;

   double length;

   int ID;

   int patchID;


   Edge(void) : next(NULL), pair(NULL), vertex(NULL), face(NULL),
      length(0)
   {
      patchID = 0;
      th = 0;
      alphaOposite = 0;
   }

   // Assignment (copy only geometrical information)
   void assignData(const Edge& rhs){
      if (this != &rhs) {
          alphaOposite = rhs.alphaOposite;
          length = rhs.length; 
          th = rhs.th; 
          cTheta = rhs.cTheta; 
          sTheta = rhs.sTheta; 
          cl2TS = rhs.cl2TS; 
          tanHTS = rhs.tanHTS;
      }
   }

   bool isBoundary() const {return !(face && pair->face);}
   Vertex * oppositeVertex() {return next->next->vertex;}

   const double & Cl2TStar() const {return cl2TS;}
   const double & tanHalfTStar() const {return tanHTS;}
   const double & sinTheta() const {return sTheta;}
   const double & cosTheta() const {return cTheta;}

   const double & theta() const {return th;}
   void setTheta(const double & _th) {
      th = _th;
      cTheta = cos(th);
      sTheta = sin(th);
      tanHTS = tan(0.5*(M_PI - th));
      cl2TS = CirclePattern::Cl2(2.0*(M_PI - th));   
   }

};
#endif

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