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/*=========================================================================
Program: Visualization Toolkit
Module: TestGPURayCastTwoComponentsGradient.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.
=========================================================================*/
// Description
// This test creates a vtkImageData with two components.
// The data is volume rendered considering the two components as independent.
#include "vtkCamera.h"
#include "vtkColorTransferFunction.h"
#include "vtkGPUVolumeRayCastMapper.h"
#include "vtkImageData.h"
#include "vtkNew.h"
#include "vtkPiecewiseFunction.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkTesting.h"
#include "vtkTestUtilities.h"
#include "vtkVolume.h"
#include "vtkVolumeProperty.h"
#include "vtkUnsignedShortArray.h"
int TestGPURayCastTwoComponentsGradient(int argc, char *argv[])
{
cout << "CTEST_FULL_OUTPUT (Avoid ctest truncation of output)" << endl;
int dims[3] = { 35, 35, 35 };
// Create a vtkImageData with two components
vtkNew<vtkImageData> image;
image->SetDimensions(dims[0], dims[1], dims[2]);
image->AllocateScalars(VTK_DOUBLE, 2);
// Fill the first half rectangular parallelopiped along X with the
// first component values and the second half with second component values
double * ptr = static_cast<double *> (image->GetScalarPointer(0, 0, 0));
for (int z = 0; z < dims[2]; ++z)
{
for (int y = 0; y < dims[1]; ++y)
{
for (int x = 0; x < dims[0]; ++x)
{
if (x < dims[0] / 2)
{
*ptr++ = 0.0;
*ptr++ = 0.0;
}
else
{
*ptr++ = 1.0;
*ptr++ = 1.0;
}
}
}
}
vtkNew<vtkRenderWindow> renWin;
renWin->SetSize(301, 300); // Intentional NPOT size
renWin->SetMultiSamples(0);
vtkNew<vtkRenderer> ren;
renWin->AddRenderer(ren.GetPointer());
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renWin.GetPointer());
renWin->Render();
// Volume render the dataset
vtkNew<vtkGPUVolumeRayCastMapper> mapper;
mapper->AutoAdjustSampleDistancesOff();
mapper->SetSampleDistance(0.9);
mapper->SetInputData(image.GetPointer());
// Color transfer function
vtkNew<vtkColorTransferFunction> ctf1;
ctf1->AddRGBPoint(0.0, 0.0, 0.0, 0.0);
ctf1->AddRGBPoint(1.0, 1.0, 0.0, 0.0);
vtkNew<vtkColorTransferFunction> ctf2;
ctf2->AddRGBPoint(0.0, 0.0, 0.0, 0.0);
ctf2->AddRGBPoint(1.0, 0.0, 0.0, 1.0);
// Opacity functions
vtkNew<vtkPiecewiseFunction> pf1;
pf1->AddPoint(0.0, 0.0);
pf1->AddPoint(1.0, 1.0);
vtkNew<vtkPiecewiseFunction> pf2;
pf2->AddPoint(0.0, 0.0);
pf2->AddPoint(1.0, 1.0);
// Gradient Opacity function
vtkNew<vtkPiecewiseFunction> pf3;
pf3->AddPoint(0.0, 0.0);
pf3->AddPoint(1.0, 1.0);
vtkNew<vtkPiecewiseFunction> pf4;
pf4->AddPoint(0.0, 0.0);
pf4->AddPoint(1.0, 1.0);
// Volume property with independent components ON
vtkNew<vtkVolumeProperty> property;
property->IndependentComponentsOn();
// Set color and opacity functions
property->SetColor(0, ctf1.GetPointer());
property->SetColor(1, ctf2.GetPointer());
property->SetScalarOpacity(0, pf1.GetPointer());
property->SetScalarOpacity(1, pf2.GetPointer());
property->SetGradientOpacity(0, pf3.GetPointer());
property->SetGradientOpacity(1, pf4.GetPointer());
vtkNew<vtkVolume> volume;
volume->SetMapper(mapper.GetPointer());
volume->SetProperty(property.GetPointer());
ren->AddVolume(volume.GetPointer());
ren->ResetCamera();
renWin->Render();
iren->Initialize();
int retVal = vtkRegressionTestImage( renWin.GetPointer() );
if( retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
return !retVal;
}
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