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/*=========================================================================
Program: Visualization Toolkit
Module: TestGPURayCastIndependentVectorMode.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
* Tests the vector rendering mode in vtkVolumeSmartMapper. VectorMode builds
* on the independent component support provided by GPURayCastMapper. Each of
* the components are considered independent vector components. To render the
* vector's magnitude, an additional data array is computed through vtkImageMagnitude.
* This test renders a component and the vector magnitude in two separate volumes.
*/
#include "vtkCamera.h"
#include "vtkColorTransferFunction.h"
#include "vtkSmartVolumeMapper.h"
#include "vtkImageData.h"
#include "vtkInteractorStyleTrackballCamera.h"
#include "vtkNew.h"
#include "vtkPiecewiseFunction.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRegressionTestImage.h"
#include "vtkVolume.h"
#include "vtkVolumeProperty.h"
int TestGPURayCastIndependentVectorMode(int argc, char *argv[])
{
//cout << "CTEST_FULL_OUTPUT (Avoid ctest truncation of output)" << endl;
int dims[3] = {20, 20, 20};
// Create a vtkImageData with two components
vtkNew<vtkImageData> image;
image->SetDimensions(dims[0], dims[1], dims[2]);
image->AllocateScalars(VTK_DOUBLE, 3);
for (int z = 0; z < dims[2]; ++z)
{
for (int y = 0; y < dims[1]; ++y)
{
for (int x = 0; x < dims[0]; ++x)
{
// The 3-component vector field is described by:
// V = coords_x * iHat + 10 * coords_y * jHat + coords_z * kHat
float const valueX = static_cast<float>(x) - dims[0]/2.0f;
float const valueY = static_cast<float>(y) - dims[1]/2.0f;
float const valueZ = static_cast<float>(z) - dims[2]/2.0f;
image->SetScalarComponentFromFloat(x, y, z, 0, valueX);
image->SetScalarComponentFromFloat(x, y, z, 1, valueY * 10.f);
image->SetScalarComponentFromFloat(x, y, z, 2, valueZ);
}
}
}
vtkNew<vtkRenderWindow> renWin;
renWin->SetSize(400, 400);
renWin->SetMultiSamples(0);
vtkNew<vtkRenderer> ren;
ren->SetBackground(0.3176, 0.3412, 0.4314);
renWin->AddRenderer(ren.GetPointer());
vtkNew<vtkRenderWindowInteractor> iren;
vtkNew<vtkInteractorStyleTrackballCamera> style;
iren->SetInteractorStyle(style.GetPointer());
iren->SetRenderWindow(renWin.GetPointer());
renWin->Render();
// Volume render - Component
vtkNew<vtkSmartVolumeMapper> mapper;
mapper->AutoAdjustSampleDistancesOff();
mapper->SetSampleDistance(0.5);
mapper->SetInputData(image.GetPointer());
// TFs (known x values from V)
vtkNew<vtkColorTransferFunction> ctf1;
ctf1->AddRGBPoint(-100, 0.0, 0.0, 1.0);
ctf1->AddRGBPoint(0, 0.86, 0.86, 0.86);
ctf1->AddRGBPoint(100, 1.0, 0.0, 0.0);
vtkNew<vtkPiecewiseFunction> pf1;
pf1->AddPoint(-100.0, 0.0);
pf1->AddPoint(0, 0.5);
pf1->AddPoint(100, 1.0);
vtkNew<vtkVolumeProperty> property;
property->IndependentComponentsOn();
property->SetColor(0, ctf1.GetPointer());
property->SetScalarOpacity(0, pf1.GetPointer());
vtkNew<vtkVolume> volume;
volume->SetMapper(mapper.GetPointer());
volume->SetProperty(property.GetPointer());
ren->AddVolume(volume.GetPointer());
mapper->SetVectorMode(vtkSmartVolumeMapper::COMPONENT);
mapper->SetVectorComponent(1);
// Volume render - Magnitude
vtkNew<vtkSmartVolumeMapper> mapperMag;
mapperMag->AutoAdjustSampleDistancesOff();
mapperMag->SetSampleDistance(0.5);
mapperMag->SetInputData(image.GetPointer());
// TFs (known x values from V)
vtkNew<vtkColorTransferFunction> ctf2;
ctf2->AddRGBPoint(0, 0.0, 0.0, 1.0);
ctf2->AddRGBPoint(50, 0.86, 0.86, 0.86);
ctf2->AddRGBPoint(101, 1.0, 0.0, 0.0);
vtkNew<vtkPiecewiseFunction> pf2;
pf2->AddPoint(0, 0.0);
pf2->AddPoint(50, 0.3);
pf2->AddPoint(101, 1.0);
vtkNew<vtkVolumeProperty> propertyMag;
propertyMag->SetColor(0, ctf2.GetPointer());
propertyMag->SetScalarOpacity(0, pf2.GetPointer());
vtkNew<vtkVolume> volumeMag;
volumeMag->SetMapper(mapperMag.GetPointer());
volumeMag->SetProperty(propertyMag.GetPointer());
ren->AddVolume(volumeMag.GetPointer());
volumeMag->SetPosition(20.0, 20.0, 0.0);
image->Modified(); /* force magnitude update */
mapperMag->SetVectorMode(vtkSmartVolumeMapper::MAGNITUDE);
// Render loop
ren->ResetCamera();
renWin->Render();
int retVal = vtkRegressionTestImage(renWin.GetPointer());
if( retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
return !retVal;
}
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