text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    TestResampleToImage2D.cxx
  
    Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
    All rights reserved.
    See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
  
       This software is distributed WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.  See the above copyright notice for more information.
  
  =========================================================================*/
  // This is just a simple test. vtkResampleToImage internally uses
  // vtkProbeFilter, which is tested thoroughly in other tests.
  
  #include "vtkDataArray.h"
  #include "vtkImageData.h"
  #include "vtkPointData.h"
  #include "vtkResampleToImage.h"
  #include "vtkTestUtilities.h"
  #include "vtkXMLUnstructuredGridReader.h"
  
  int TestResampleToImage2D(int argc, char* argv[])
  {
    vtkNew<vtkXMLUnstructuredGridReader> reader;
    char* fname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/delaunay3d.vtu");
    reader->SetFileName(fname);
    delete[] fname;
  
    vtkNew<vtkResampleToImage> resample;
    resample->UseInputBoundsOff();
    resample->SetInputConnection(reader->GetOutputPort());
  
    double* range = nullptr;
  
    // test on X
    resample->SetSamplingBounds(0.0, 0.0, -10.0, 10.0, -10.0, 10.0);
    resample->SetSamplingDimensions(1, 100, 100);
    resample->Update();
    range = resample->GetOutput()->GetPointData()->GetArray("BrownianVectors")->GetRange();
    if (range[1] - range[0] < 0.01)
    {
      cerr << "Error resampling along X" << endl;
    }
  
    // test on Y
    resample->SetSamplingBounds(-10.0, 10.0, 0.0, 0.0, -10.0, 10.0);
    resample->SetSamplingDimensions(100, 1, 100);
    resample->Update();
    range = resample->GetOutput()->GetPointData()->GetArray("BrownianVectors")->GetRange();
    if (range[1] - range[0] < 0.01)
    {
      cerr << "Error resampling along Y" << endl;
    }
  
    // test on Z
    resample->SetSamplingBounds(-10.0, 10.0, -10.0, 10.0, 0.0, 0.0);
    resample->SetSamplingDimensions(100, 100, 1);
    resample->Update();
    range = resample->GetOutput()->GetPointData()->GetArray("BrownianVectors")->GetRange();
    if (range[1] - range[0] < 0.01)
    {
      cerr << "Error resampling along Z" << endl;
    }
  
    return EXIT_SUCCESS;
  }
  