/*===========================================================================*\
 *                                                                           *
 *                               OpenMesh                                    *
 *      Copyright (C) 2001-2013 by Computer Graphics Group, RWTH Aachen      *
 *                           www.openmesh.org                                *
 *                                                                           *
 *---------------------------------------------------------------------------*
 *  This file is part of OpenMesh.                                           *
 *                                                                           *
 *  OpenMesh 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 3 of           *
 *  the License, or (at your option) any later version with the              *
 *  following exceptions:                                                    *
 *                                                                           *
 *  If other files instantiate templates or use macros                       *
 *  or inline functions from this file, or you compile this file and         *
 *  link it with other files to produce an executable, this file does        *
 *  not by itself cause the resulting executable to be covered by the        *
 *  GNU Lesser General Public License. This exception does not however       *
 *  invalidate any other reasons why the executable file might be            *
 *  covered by the GNU Lesser General Public License.                        *
 *                                                                           *
 *  OpenMesh 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 LesserGeneral Public          *
 *  License along with OpenMesh.  If not,                                    *
 *  see <http://www.gnu.org/licenses/>.                                      *
 *                                                                           *
\*===========================================================================*/

/*===========================================================================*\
 *                                                                           *
 *   $Revision$                                                         *
 *   $Date$                   *
 *                                                                           *
\*===========================================================================*/


#include <iostream>
// -------------------- OpenMesh
#include <OpenMesh/Core/IO/MeshIO.hh>
#include <OpenMesh/Core/Mesh/PolyMesh_ArrayKernelT.hh>


// ----------------------------------------------------------------------------

typedef OpenMesh::PolyMesh_ArrayKernelT<>  MyMesh;


// ----------------------------------------------------------------------------
// Build a simple cube and write it to std::cout
  
int main()
{
  MyMesh mesh;

  // generate vertices

  MyMesh::VertexHandle vhandle[8];

  vhandle[0] = mesh.add_vertex(MyMesh::Point(-1, -1,  1));
  vhandle[1] = mesh.add_vertex(MyMesh::Point( 1, -1,  1));
  vhandle[2] = mesh.add_vertex(MyMesh::Point( 1,  1,  1));
  vhandle[3] = mesh.add_vertex(MyMesh::Point(-1,  1,  1));
  vhandle[4] = mesh.add_vertex(MyMesh::Point(-1, -1, -1));
  vhandle[5] = mesh.add_vertex(MyMesh::Point( 1, -1, -1));
  vhandle[6] = mesh.add_vertex(MyMesh::Point( 1,  1, -1));
  vhandle[7] = mesh.add_vertex(MyMesh::Point(-1,  1, -1));


  // generate (quadrilateral) faces

  std::vector<MyMesh::VertexHandle>  face_vhandles;

  face_vhandles.clear();
  face_vhandles.push_back(vhandle[0]);
  face_vhandles.push_back(vhandle[1]);
  face_vhandles.push_back(vhandle[2]);
  face_vhandles.push_back(vhandle[3]);
  mesh.add_face(face_vhandles);
 
  face_vhandles.clear();
  face_vhandles.push_back(vhandle[7]);
  face_vhandles.push_back(vhandle[6]);
  face_vhandles.push_back(vhandle[5]);
  face_vhandles.push_back(vhandle[4]);
  mesh.add_face(face_vhandles);

  face_vhandles.clear();
  face_vhandles.push_back(vhandle[1]);
  face_vhandles.push_back(vhandle[0]);
  face_vhandles.push_back(vhandle[4]);
  face_vhandles.push_back(vhandle[5]);
  mesh.add_face(face_vhandles);

  face_vhandles.clear();
  face_vhandles.push_back(vhandle[2]);
  face_vhandles.push_back(vhandle[1]);
  face_vhandles.push_back(vhandle[5]);
  face_vhandles.push_back(vhandle[6]);
  mesh.add_face(face_vhandles);

  face_vhandles.clear();
  face_vhandles.push_back(vhandle[3]);
  face_vhandles.push_back(vhandle[2]);
  face_vhandles.push_back(vhandle[6]);
  face_vhandles.push_back(vhandle[7]);
  mesh.add_face(face_vhandles);

  face_vhandles.clear();
  face_vhandles.push_back(vhandle[0]);
  face_vhandles.push_back(vhandle[3]);
  face_vhandles.push_back(vhandle[7]);
  face_vhandles.push_back(vhandle[4]);
  mesh.add_face(face_vhandles);


  // write mesh to output.obj
  try
  {
    if ( !OpenMesh::IO::write_mesh(mesh, "output.off") )
    {
      std::cerr << "Cannot write mesh to file 'output.off'" << std::endl;
      return 1;
    }
  }
  catch( std::exception& x )
  {
    std::cerr << x.what() << std::endl;
    return 1;
  }

  return 0;
}