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/*=========================================================================
Program: Visualization Toolkit
Module: TestGPURayCastJitteringCustom.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.
=========================================================================*/
/** Tests stochastic jittering by rendering a volume exhibiting aliasing due
* to a big sampling distance (low sampling frequency), a.k.a. wood-grain
* artifacts. The expected output is 'filtered' due to the noise introduced
* by a customized noise generator.
*/
#include <iostream>
#include <vtkCamera.h>
#include <vtkColorTransferFunction.h>
#include <vtkGPUVolumeRayCastMapper.h>
#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkNew.h>
#include <vtkOpenGLGPUVolumeRayCastMapper.h>
#include <vtkPerlinNoise.h>
#include <vtkPiecewiseFunction.h>
#include <vtkRegressionTestImage.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkStructuredPointsReader.h>
#include <vtkTestUtilities.h>
#include <vtkVolume.h>
#include <vtkVolumeProperty.h>
static const char* TestGPURayCastJitteringCustomLog =
"# StreamVersion 1\n"
"EnterEvent 298 27 0 0 0 0 0\n"
"MouseWheelForwardEvent 200 142 0 0 0 0 0\n"
"LeaveEvent 311 71 0 0 0 0 0\n";
int TestGPURayCastJitteringCustom(int argc, char* argv[])
{
cout << "CTEST_FULL_OUTPUT (Avoid ctest truncation of output)" << endl;
char* volumeFile = vtkTestUtilities::ExpandDataFileName(
argc, argv, "Data/ironProt.vtk");
vtkNew<vtkStructuredPointsReader> reader;
reader->SetFileName(volumeFile);
delete[] volumeFile;
vtkNew<vtkGPUVolumeRayCastMapper> mapper;
mapper->SetInputConnection(reader->GetOutputPort());
mapper->SetAutoAdjustSampleDistances(0);
mapper->SetSampleDistance(2.0);
mapper->UseJitteringOn();
vtkNew<vtkColorTransferFunction> color;
color->AddRGBPoint(0.0, 0.0, 0.0, 0.0);
color->AddRGBPoint(64.0, 1.0, 0.0, 0.0);
color->AddRGBPoint(128.0, 0.0, 0.0, 1.0);
color->AddRGBPoint(192.0, 0.0, 1.0, 0.0);
color->AddRGBPoint(255.0, 0.0, 0.2, 0.0);
vtkNew<vtkPiecewiseFunction> opacity;
opacity->AddPoint(0.0, 0.0);
opacity->AddPoint(255.0, 1.0);
vtkNew<vtkVolumeProperty> property;
property->SetColor(color.GetPointer());
property->SetScalarOpacity(opacity.GetPointer());
property->SetInterpolationTypeToLinear();
property->ShadeOff();
vtkNew<vtkVolume> volume;
volume->SetMapper(mapper.GetPointer());
volume->SetProperty(property.GetPointer());
vtkNew<vtkRenderWindow> renWin;
renWin->SetSize(400, 400);
renWin->SetMultiSamples(0);
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renWin.GetPointer());
vtkNew<vtkInteractorStyleTrackballCamera> style;
iren->SetInteractorStyle(style.GetPointer());
vtkNew<vtkRenderer> ren;
renWin->AddRenderer(ren.GetPointer());
ren->AddVolume(volume.GetPointer());
ren->ResetCamera();
ren->GetActiveCamera()->SetPosition(79.1817, 14.6622, 62.9264);
ren->GetActiveCamera()->SetFocalPoint(32.0598, 26.5308, 28.0257);
renWin->Render();
iren->Initialize();
// Customize the noise function and texture size
vtkOpenGLGPUVolumeRayCastMapper* glMapper =
vtkOpenGLGPUVolumeRayCastMapper::SafeDownCast(mapper.GetPointer());
int texSize[2] = {600, 600};
glMapper->SetNoiseTextureSize(texSize);
vtkPerlinNoise* generator = vtkPerlinNoise::New();
generator->SetFrequency(1024.0, 1024.0, 1.0);
generator->SetAmplitude(0.5);
glMapper->SetNoiseGenerator(generator);
generator->Delete();
renWin->Render();
int rv = vtkTesting::InteractorEventLoop(argc, argv, iren.GetPointer(),
TestGPURayCastJitteringCustomLog);
return rv;
}
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