/*=========================================================================
 *
 *  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 "itkMeshFileReader.h"
#include "itkMeshFileWriter.h"

#include "itkQuadEdgeMeshExtendedTraits.h"
#include "itkDiscreteGaussianCurvatureQuadEdgeMeshFilter.h"

int itkDiscreteGaussianCurvatureQuadEdgeMeshFilterTest( int argc, char* argv[] )
{
  if( argc < 2 )
    {
    std::cout <<"*** GaussianCurvature ***" <<std::endl;
    std::cout <<"This example requires at least one argument:" <<std::endl;
    std::cout <<" 1- FileName" <<std::endl;
    return EXIT_FAILURE;
    }

  const unsigned int Dimension = 3;
  typedef double CoordType;

  typedef itk::QuadEdgeMeshExtendedTraits <
    CoordType,
    Dimension,
    2,
    CoordType,
    CoordType,
    CoordType,
    bool,
    bool > Traits;

  typedef itk::QuadEdgeMesh< CoordType, Dimension, Traits > MeshType;
  typedef itk::DiscreteGaussianCurvatureQuadEdgeMeshFilter<
    MeshType, MeshType > CurvatureFilterType;

  typedef itk::MeshFileReader< MeshType > ReaderType;

  ReaderType::Pointer reader = ReaderType::New( );
  reader->SetFileName( argv[1] );
  try
    {
    reader->Update( );
    }
  catch( itk::ExceptionObject & excp )
    {
    std::cerr << "Exception thrown while reading the input file " << std::endl;
    std::cerr << excp << std::endl;
    return EXIT_FAILURE;
    }

  MeshType::Pointer mesh = reader->GetOutput();

  CurvatureFilterType::Pointer gaussian_curvature = CurvatureFilterType::New();
  gaussian_curvature->SetInput( mesh );
  gaussian_curvature->Update();

  MeshType::Pointer output = gaussian_curvature->GetOutput();

  typedef itk::MeshFileWriter< MeshType > WriterType;
  WriterType::Pointer writer = WriterType::New();
  writer->SetInput( output );
  writer->SetFileName( "gaussian_curvature.vtk" );
  writer->Update();

  // ** PRINT **
  std::cout << gaussian_curvature;
  return EXIT_SUCCESS;
}
