text: /*
   * Copyright (C) 2005-2019 Centre National d'Etudes Spatiales (CNES)
   *
   * This file is part of Orfeo Toolbox
   *
   *     https://www.orfeo-toolbox.org/
   *
   * 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
   *
   * 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 "itkMacro.h"
  
  #include "otbBSplineInterpolateImageFunction.h"
  #include "otbImage.h"
  #include "otbImageFileReader.h"
  #include <fstream>
  
  int otbBSplineInterpolateImageFunction(int argc, char* argv[])
  {
    const char* infname  = argv[1];
    const char* outfname = argv[2];
  
    typedef otb::Image<double, 2> ImageType;
    typedef otb::BSplineInterpolateImageFunction<ImageType, double, double> InterpolatorType;
    typedef InterpolatorType::ContinuousIndexType ContinuousIndexType;
    typedef otb::ImageFileReader<ImageType>       ReaderType;
  
    int i = 3;
  
    std::vector<ContinuousIndexType> indicesList;
  
    while (i < argc && (i + 1) < argc)
    {
      ContinuousIndexType idx;
  
      idx[0] = atof(argv[i]);
      idx[1] = atof(argv[i + 1]);
  
      indicesList.push_back(idx);
  
      i += 2;
    }
  
    // Instantiating object
    InterpolatorType::Pointer interpolator = InterpolatorType::New();
  
    ReaderType::Pointer reader = ReaderType::New();
    reader->SetFileName(infname);
    reader->Update();
  
    interpolator->SetInputImage(reader->GetOutput());
  
    std::ofstream file;
    file.open(outfname);
  
    for (std::vector<ContinuousIndexType>::iterator it = indicesList.begin(); it != indicesList.end(); ++it)
    {
      file << (*it) << " -> " << interpolator->EvaluateAtContinuousIndex((*it)) << std::endl;
    }
  
    file.close();
  
    return EXIT_SUCCESS;
  }
  