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/*=========================================================================
Program: Visualization Toolkit
Module: TestGPURayCastGradientOpacity.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 code volume renders the torso dataset and tests the gradient opacity
// function support for volume mappers
#include "vtkCamera.h"
#include "vtkColorTransferFunction.h"
#include "vtkGPUVolumeRayCastMapper.h"
#include "vtkInteractorStyleTrackballCamera.h"
#include "vtkMetaImageReader.h"
#include "vtkNew.h"
#include "vtkPiecewiseFunction.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkTestUtilities.h"
#include "vtkVolume.h"
#include "vtkVolumeProperty.h"
int TestGPURayCastGradientOpacity(int argc, char* argv[])
{
cout << "CTEST_FULL_OUTPUT (Avoid ctest truncation of output)" << endl;
vtkNew<vtkRenderWindow> renWin;
renWin->SetSize(400, 401);
renWin->SetMultiSamples(0);
vtkNew<vtkRenderer> ren1;
ren1->SetViewport(0.0, 0.0, 0.5, 1.0);
renWin->AddRenderer(ren1.GetPointer());
vtkNew<vtkRenderer> ren2;
ren2->SetViewport(0.5, 0.0, 1.0, 1.0);
renWin->AddRenderer(ren2.GetPointer());
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renWin.GetPointer());
vtkNew<vtkInteractorStyleTrackballCamera> style;
iren->SetInteractorStyle(style.GetPointer());
char* fname = vtkTestUtilities::ExpandDataFileName(argc, argv,
"Data/HeadMRVolume.mhd");
vtkNew<vtkMetaImageReader> reader;
reader->SetFileName(fname);
reader->Update();
delete [] fname;
vtkNew<vtkGPUVolumeRayCastMapper> mapper1;
mapper1->SetInputConnection(reader->GetOutputPort());
vtkNew<vtkGPUVolumeRayCastMapper> mapper2;
mapper2->SetInputConnection(reader->GetOutputPort());
vtkNew<vtkColorTransferFunction> ctf;
ctf->AddHSVPoint(1.0, 0.095, 0.33, 0.82);
ctf->AddHSVPoint(53.3, 0.04, 0.7, 0.63);
ctf->AddHSVPoint(256, 0.095, 0.33, 0.82);
vtkNew<vtkPiecewiseFunction> pwf;
pwf->AddPoint(0.0, 0.0);
pwf->AddPoint(4.48, 0.0);
pwf->AddPoint(43.116, 1.0);
pwf->AddPoint(641.0, 1.0);
vtkNew<vtkPiecewiseFunction> gf;
gf->AddPoint(10, 0.0);
gf->AddPoint(70, 1.0);
vtkNew<vtkVolumeProperty> volumeProperty1;
volumeProperty1->SetScalarOpacity(pwf.GetPointer());
volumeProperty1->SetColor(ctf.GetPointer());
volumeProperty1->SetDisableGradientOpacity(1);
volumeProperty1->ShadeOn();
vtkNew<vtkVolume> volume1;
volume1->SetMapper(mapper1.GetPointer());
volume1->SetProperty(volumeProperty1.GetPointer());
ren1->AddVolume(volume1.GetPointer());
volume1->RotateX(-20);
ren1->ResetCamera();
ren1->GetActiveCamera()->Zoom(2.2);
vtkNew<vtkVolumeProperty> volumeProperty2;
volumeProperty2->SetScalarOpacity(pwf.GetPointer());
volumeProperty2->SetColor(ctf.GetPointer());
volumeProperty2->SetGradientOpacity(gf.GetPointer());
volumeProperty2->SetDisableGradientOpacity(0);
volumeProperty2->ShadeOn();
vtkNew<vtkVolume> volume2;
volume2->SetMapper(mapper2.GetPointer());
volume2->SetProperty(volumeProperty2.GetPointer());
volume2->RotateX(-20);
ren2->AddVolume(volume2.GetPointer());
ren2->ResetCamera();
ren2->GetActiveCamera()->Zoom(2.2);
renWin->Render();
int retVal = vtkTesting::Test(argc, argv, renWin.GetPointer(), 90);
if (retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
return !((retVal == vtkTesting::PASSED) ||
(retVal == vtkTesting::DO_INTERACTOR));
}
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