SphinxExamples/src/Core/QuadEdgeMesh/CreateTriangularQuadEdgeMesh/Code.cxx

/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/

#include "itkQuadEdgeMesh.h"
#include "itkMeshFileWriter.h"

int main( int argc, char* argv[] )
{
  if( argc != 2 )
    {
    std::cerr << "Usage: "<< std::endl;
    std::cerr << argv[0];
    std::cerr << " <OutputFileName>";
    std::cerr << std::endl;
    return EXIT_FAILURE;
    }

  const char * outputFileName = argv[1];

  constexpr unsigned int Dimension = 3;

  using CoordType = double;
  using MeshType = itk::QuadEdgeMesh< CoordType, Dimension >;

  MeshType::Pointer mesh = MeshType::New();

  using PointsContainer = MeshType::PointsContainer;
  using PointsContainerPointer = MeshType::PointsContainerPointer;

  PointsContainerPointer points = PointsContainer::New();
  points->Reserve( 100 );

  using PointType = MeshType::PointType;
  PointType p;
  p[2] = 0.;

  using PointIdentifier = MeshType::PointIdentifier;
  PointIdentifier k = 0;

  for( int i = 0; i < 10; i++ )
    {
    p[0] = static_cast< CoordType >( i );

    for( int j = 0; j < 10; j++ )
      {
      p[1] = static_cast< CoordType >( j );
      points->SetElement( k, p );
      k++;
      }
    }

  mesh->SetPoints( points );

  k = 0;

  for( int i = 0; i < 9; i++ )
    {
    for( int j = 0; j < 9; j++ )
      {
      mesh->AddFaceTriangle( k, k+1,  k+11 );
      mesh->AddFaceTriangle( k, k+11, k+10 );
      k++;
      }
    k++;
    }

  using WriterType = itk::MeshFileWriter< MeshType >;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName( outputFileName );
  writer->SetInput( mesh );
  try
    {
    writer->Update();
    }
  catch( itk::ExceptionObject & error )
    {
    std::cerr << "Error: " << error << std::endl;
    return EXIT_FAILURE;
    }

  return EXIT_SUCCESS;
}