#include <vtkAutoInit.h>
VTK_MODULE_INIT(vtkRenderingVolumeOpenGL2);

#include <vtkCamera.h>
#include <vtkColorTransferFunction.h>
#include <vtkFixedPointVolumeRayCastMapper.h>
#include <vtkGPUVolumeRayCastMapper.h>
#include <vtkImageMathematics.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkPiecewiseFunction.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkSmartVolumeMapper.h>
#include <vtkStructuredPointsReader.h>
#include <vtkVolume.h>
#include <vtkVolumeProperty.h>
#include <vtkXMLImageDataReader.h>

int main(int argc, char *argv[]) {
  // This is a simple volume rendering example that
  // uses a vtkFixedPointVolumeRayCastMapper

  // Create the standard renderer, render window
  // and interactor
  vtkNew<vtkNamedColors> colors;

  vtkNew<vtkRenderer> ren1;

  vtkNew<vtkRenderWindow> renWin;
  renWin->AddRenderer(ren1);

  vtkNew<vtkRenderWindowInteractor> iren;
  iren->SetRenderWindow(renWin);

  vtkNew<vtkXMLImageDataReader> reader;
  reader->SetFileName("C:/Users/v.legarrec/Desktop/fff/"
                      "sequence_RCA_low_level_22pw_1Frame_IQ.vti");
  reader->Update();
  // filtre for absolute value.
  vtkNew<vtkImageMathematics> imageMath;
  imageMath->SetOperationToAbsoluteValue();
  imageMath->SetInputConnection(reader->GetOutputPort());
  imageMath->Update();
  vtkAlgorithmOutput *readerOutputPort = imageMath->GetOutputPort();

  // Create transfer mapping scalar value to opacity
  vtkNew<vtkPiecewiseFunction> opacityTransferFunction;
  opacityTransferFunction->AddPoint(0, 0); // Show only value from 11 to 512
  opacityTransferFunction->AddPoint(5618, 1);

  // Create transfer mapping scalar value to color
  vtkNew<vtkColorTransferFunction> colorTransferFunction;
  colorTransferFunction->AddRGBPoint(0.0, 0.0, 0.0, 1.0);
  colorTransferFunction->AddRGBPoint(5618.0, 1.0, 0.0, 0.0); // Max Value
  colorTransferFunction->Build();

  // The property describes how the data will look
  vtkNew<vtkVolumeProperty> volumeProperty;
  volumeProperty->SetColor(colorTransferFunction);
  volumeProperty->SetScalarOpacity(opacityTransferFunction);
  volumeProperty->ShadeOn();
  volumeProperty->SetInterpolationTypeToLinear();
  volumeProperty->SetScalarOpacityUnitDistance(0.0003);
  volumeProperty->Modified();

  // None of three mapper show transparency.
  // The mapper / ray cast function know how to render the data
  // vtkNew<vtkFixedPointVolumeRayCastMapper> volumeMapper;
  // vtkNew<vtkGPUVolumeRayCastMapper> volumeMapper;
  // vtkNew<vtkSmartVolumeMapper> volumeMapper;
  vtkNew<vtkFixedPointVolumeRayCastMapper> volumeMapper;
  volumeMapper->SetInputConnection(readerOutputPort);
  // Doesn't work
  /*
  // volumeMapper->SetBlendModeToComposite();
  // volumeMapper->SetScalarModeToUsePointData();
  // volumeMapper->SetAutoAdjustSampleDistances(false);
  */
  volumeMapper->SetSampleDistance(0.0001);

  // The volume holds the mapper and the property and
  // can be used to position/orient the volume
  vtkNew<vtkVolume> volume;
  volume->SetMapper(volumeMapper);
  volume->SetProperty(volumeProperty);

  ren1->AddViewProp(volume);
  ren1->SetBackground(colors->GetColor3d("Wheat").GetData());
  ren1->GetActiveCamera()->Azimuth(45);
  ren1->GetActiveCamera()->Elevation(30);
  ren1->ResetCameraClippingRange();
  ren1->ResetCamera();
  // Doesn't work
  /*
  ren1->SetUseDepthPeeling(1);
  ren1->SetMaximumNumberOfPeels(100);
  */

  renWin->SetSize(600, 600);
  renWin->SetWindowName("SimpleRayCast");
  // Doesn't work
  /*
  renWin->SetAlphaBitPlanes(1);
  renWin->SetMultiSamples(0);
  */
  renWin->Render();

  iren->Start();

  return EXIT_SUCCESS;
}