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/*=========================================================================
Program: Visualization Toolkit
Module: TestGPURayCastCompositeBinaryMask1.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 test masks a rectangular volume to a cylindrical shape and tests that
// the mask is persistent with changing volume property parameters
#include "vtkColorTransferFunction.h"
#include "vtkGPUVolumeRayCastMapper.h"
#include "vtkImageData.h"
#include "vtkNew.h"
#include "vtkPiecewiseFunction.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkTesting.h"
#include "vtkVolume.h"
#include "vtkVolumeProperty.h"
int TestGPURayCastCompositeBinaryMask1(int argc, char *argv[])
{
cout << "CTEST_FULL_OUTPUT (Avoid ctest truncation of output)" << endl;
// Dimensions of object
const int cx = 128;
const int cy = 128;
const int cz = 512;
// Full scale value for data
const double fullScale = 100.0;
// Create the image data and mask objects
vtkNew<vtkImageData> imageData;
imageData->SetDimensions(cx, cy, cz);
imageData->AllocateScalars(VTK_UNSIGNED_SHORT, 1);
vtkNew<vtkImageData> imageMask;
imageMask->SetDimensions(cx, cy, cz);
imageMask->AllocateScalars(VTK_UNSIGNED_CHAR, 1);
// Get pointers to the image and mask data's scalar arrays
unsigned short *image =
static_cast<unsigned short*>(imageData->GetScalarPointer());
unsigned char *mask =
static_cast<unsigned char*>(imageMask->GetScalarPointer());
// Initialize image and mask with data
int index = 0;
for (int z = 0; z < cz; ++z)
{
for( int y=0; y < cy; ++y)
{
for( int x=0; x < cx; ++x)
{
// Data will increase from 0 to full scale in the z direction
image[index] = static_cast<unsigned short>( fullScale * z / cz);
// Inside the mask? Radius of cylinder mask is 1/2 cx which should
// equal cy
const double radius = cx / 2.0;
const double xCenter = cx / 2.0;
const double yCenter = cy / 2.0;
const double distance = sqrt(pow(x-xCenter, 2.0) + pow(y-yCenter, 2.0));
const bool inside = distance < radius;
mask[index] = (inside) ? 255 : 0;
index++;
}
}
}
// Create a volume mapper and add image data and mask
vtkNew<vtkGPUVolumeRayCastMapper> mapper;
mapper->SetInputData(imageData.GetPointer());
mapper->SetMaskInput(imageMask.GetPointer());
mapper->SetMaskTypeToBinary();
// Create color and opacity nodes (red and blue)
vtkNew<vtkColorTransferFunction> colors;
colors->AddHSVPoint(0.0*fullScale, 0.0, 0.5, 0.5);
colors->AddHSVPoint(1.0*fullScale, 2.0/3.0, 0.5, 0.5);
vtkNew<vtkPiecewiseFunction> opacities;
opacities->AddPoint(0.0*fullScale, 0.6);
opacities->AddPoint(1.0*fullScale, 0.6);
// Create color property
vtkNew<vtkVolumeProperty> colorProperty;
colorProperty->SetColor(colors.GetPointer());
colorProperty->SetScalarOpacity(opacities.GetPointer());
// Create volume
vtkNew<vtkVolume> volume;
volume->SetMapper(mapper.GetPointer());
volume->SetProperty(colorProperty.GetPointer());
// Render
vtkNew<vtkRenderWindow> renWin;
renWin->SetMultiSamples(0);
renWin->SetSize(301, 300); // Intentional NPOT size
vtkNew<vtkRenderer> ren;
renWin->AddRenderer(ren.GetPointer());
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renWin.GetPointer());
renWin->Render();
int valid = mapper->IsRenderSupported(renWin.GetPointer(),
colorProperty.GetPointer());
if (!valid)
{
cout << "Required extensions not supported." << endl;
return EXIT_SUCCESS;
}
ren->AddVolume(volume.GetPointer());
renWin->Render();
double values[6];
colors->GetNodeValue(0, values);
values[2] = 0.5; values[3] = 0.5;
colors->SetNodeValue(0, values);
ren->ResetCamera();
renWin->Render();
return vtkTesting::InteractorEventLoop( argc, argv, iren.GetPointer() );
}
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