mesh_triangle_holes.h

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2018 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner

// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.

// This library 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
// Lesser General Public License for more details.

// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef LIBMESH_MESH_TRIANGLE_HOLES_H
#define LIBMESH_MESH_TRIANGLE_HOLES_H

#include "libmesh/libmesh_config.h"

#ifdef LIBMESH_HAVE_TRIANGLE

// Local includes
#include "libmesh/mesh_triangle_interface.h"
#include "libmesh/point.h"

// C++ includes

namespace libMesh
{

class TriangleInterface::Hole
{
public:
  Hole() {}

  virtual ~Hole() {}

  virtual unsigned int n_points() const = 0;

  virtual Point point(const unsigned int n) const = 0;

  virtual Point inside() const = 0;
};





class TriangleInterface::PolygonHole : public TriangleInterface::Hole
{
public:
  PolygonHole(const Point & center, Real radius, unsigned int n_points);

  virtual unsigned int n_points() const override;

  virtual Point point(const unsigned int n) const override;

  virtual Point inside() const override;

private:
  Point _center;

  Real _radius;

  unsigned int _n_points;
};




class TriangleInterface::ArbitraryHole : public TriangleInterface::Hole
{
public:
  ArbitraryHole(const Point & center,
                const std::vector<Point> & points);

  virtual unsigned int n_points() const override;

  virtual Point point(const unsigned int n) const override;

  virtual Point inside() const override;

private:
  Point _center;

  const std::vector<Point> & _points;
};

} // namespace libMesh

#endif // LIBMESH_HAVE_TRIANGLE

#endif // LIBMESH_MESH_TRIANGLE_HOLES_H