triangulation.h

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/*

  This file is a part of GRALE, a library to facilitate the simulation
  and inversion of gravitational lenses.

  Copyright (C) 2008-2012 Jori Liesenborgs

  Contact: jori.liesenborgs@gmail.com
  
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  
*/

#ifndef GRALE_TRIANGULATION_H

#define GRALE_TRIANGULATION_H

#include "graleconfig.h"
#include "vector2d.h"
#include <errut/errorbase.h>
#include <list>
#include <vector>

namespace grale
{

class TriangleIndices
{
public:
        TriangleIndices()                                                               { }
        TriangleIndices(int a, int b, int c)                                            { m_index[0] = a; m_index[1] = b; m_index[2] = c; }
        int getIndex(int i) const                                                       { return m_index[i]; }
private:
        int m_index[3];
};

class GRALE_IMPORTEXPORT Triangulation : public errut::ErrorBase
{
public:
        Triangulation();
        ~Triangulation();
        bool create(const std::vector<Vector2D<double> > &points);
        bool create(const std::vector<Vector2D<double> > &points, const std::vector<std::pair<int, int> > &constraints);
        void getTriangles(std::list<TriangleIndices> &t) const;
private:
        std::list<TriangleIndices> m_triangles;
};

} // end namespace

#endif // GRALE_TRIANGULATION_H