vtkResliceImageViewer vs vtkImageViewer2

CMakeLists.txt

project( viewer )

cmake_minimum_required( VERSION 2.8 )

find_package( VTK REQUIRED )
include( ${VTK_USE_FILE} )

add_executable( viewer MACOSX_BUNDLE viewer.cxx )
target_link_libraries( viewer ${VTK_LIBRARIES} )

viewer.cxx

#include <vtkImageData.h>
#include <vtkMetaImageReader.h>

#include <vtkResliceImageViewer.h>
#include <vtkImageViewer2.h>

#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>

int main( int argc, char* argv[] )
{
  if( argc != 4 )
  {
    std::cerr << "Usage:" << std::endl;
    std::cerr << argv[0] << " <filename> <orientation (0,1,2)> <reslice viewer (0 or 1)>" << std::endl;
    return EXIT_FAILURE;
  }

  vtkSmartPointer<vtkMetaImageReader> reader = vtkSmartPointer<vtkMetaImageReader>::New();
  reader->SetFileName( argv[1] );
  reader->Update();

  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();

  if( atoi( argv[3] ) != 0 )
  {
    vtkSmartPointer< vtkResliceImageViewer > imageViewer = vtkSmartPointer< vtkResliceImageViewer >::New();
    imageViewer->SetInputData( reader->GetOutput() );
    imageViewer->SetSliceOrientation( atoi( argv[2] ) );

    imageViewer->SetupInteractor(renderWindowInteractor);
    imageViewer->Render();
    imageViewer->GetRenderer()->ResetCamera();
    imageViewer->Render();
  }
  else
  {
    vtkSmartPointer< vtkImageViewer2 > imageViewer = vtkSmartPointer< vtkImageViewer2 >::New();
    imageViewer->SetInputData( reader->GetOutput() );
    imageViewer->SetSliceOrientation( atoi( argv[2] ) );

    imageViewer->SetupInteractor(renderWindowInteractor);
    imageViewer->Render();
    imageViewer->GetRenderer()->ResetCamera();
    imageViewer->Render();
  }

  renderWindowInteractor->Start();
  return EXIT_SUCCESS;
}