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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright (c) Sandia Corporation
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkActor.h"
#include "vtkArrowSource.h"
#include "vtkAssignAttribute.h"
#include "vtkCamera.h"
#include "vtkCellCenters.h"
#include "vtkExtractEdges.h"
#include "vtkGlyph3D.h"
#include "vtkGradientFilter.h"
#include "vtkPointDataToCellData.h"
#include "vtkPolyDataMapper.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkTubeFilter.h"
#include "vtkUnstructuredGridReader.h"
#include "vtkSmartPointer.h"
#define VTK_CREATE(type, var) vtkSmartPointer<type> var = vtkSmartPointer<type>::New()
int UnstructuredGridCellGradients(int argc, char* argv[])
{
int i;
// Need to get the data root.
const char* data_root = nullptr;
for (i = 0; i < argc - 1; i++)
{
if (strcmp("-D", argv[i]) == 0)
{
data_root = argv[i + 1];
break;
}
}
if (!data_root)
{
cout << "Need to specify the directory to VTK_DATA_ROOT with -D <dir>." << endl;
return 1;
}
// Create the reader for the data.
// This is the data that will be volume rendered.
std::string filename;
filename = data_root;
filename += "/Data/uGridEx.vtk";
cout << "Loading " << filename << endl;
VTK_CREATE(vtkUnstructuredGridReader, reader);
reader->SetFileName(filename.c_str());
VTK_CREATE(vtkExtractEdges, edges);
edges->SetInputConnection(reader->GetOutputPort());
VTK_CREATE(vtkTubeFilter, tubes);
tubes->SetInputConnection(edges->GetOutputPort());
tubes->SetRadius(0.0625);
tubes->SetVaryRadiusToVaryRadiusOff();
tubes->SetNumberOfSides(32);
VTK_CREATE(vtkPolyDataMapper, tubesMapper);
tubesMapper->SetInputConnection(tubes->GetOutputPort());
tubesMapper->SetScalarRange(0.0, 26.0);
VTK_CREATE(vtkActor, tubesActor);
tubesActor->SetMapper(tubesMapper);
VTK_CREATE(vtkPointDataToCellData, pd2cd);
pd2cd->SetInputConnection(reader->GetOutputPort());
VTK_CREATE(vtkGradientFilter, gradients);
gradients->SetInputConnection(pd2cd->GetOutputPort());
gradients->SetInputScalars(vtkDataObject::FIELD_ASSOCIATION_CELLS, vtkDataSetAttributes::SCALARS);
VTK_CREATE(vtkCellCenters, cellCenters);
cellCenters->SetInputConnection(gradients->GetOutputPort());
VTK_CREATE(vtkAssignAttribute, vectors);
vectors->SetInputConnection(cellCenters->GetOutputPort());
vectors->Assign("Gradients", vtkDataSetAttributes::VECTORS, vtkAssignAttribute::POINT_DATA);
VTK_CREATE(vtkArrowSource, arrow);
VTK_CREATE(vtkGlyph3D, glyphs);
glyphs->SetInputConnection(0, vectors->GetOutputPort());
glyphs->SetInputConnection(1, arrow->GetOutputPort());
glyphs->ScalingOn();
glyphs->SetScaleModeToScaleByVector();
glyphs->SetScaleFactor(0.25);
glyphs->OrientOn();
glyphs->ClampingOff();
glyphs->SetVectorModeToUseVector();
glyphs->SetIndexModeToOff();
VTK_CREATE(vtkPolyDataMapper, glyphMapper);
glyphMapper->SetInputConnection(glyphs->GetOutputPort());
glyphMapper->ScalarVisibilityOff();
VTK_CREATE(vtkActor, glyphActor);
glyphActor->SetMapper(glyphMapper);
VTK_CREATE(vtkRenderer, renderer);
renderer->AddActor(tubesActor);
renderer->AddActor(glyphActor);
renderer->SetBackground(0.328125, 0.347656, 0.425781);
VTK_CREATE(vtkRenderWindow, renwin);
renwin->SetMultiSamples(0);
renwin->AddRenderer(renderer);
renwin->SetSize(350, 500);
renderer->ResetCamera();
vtkCamera* camera = renderer->GetActiveCamera();
camera->Elevation(-85.0);
camera->OrthogonalizeViewUp();
camera->Elevation(-5.0);
camera->OrthogonalizeViewUp();
camera->Elevation(-10.0);
camera->Azimuth(55.0);
int retVal = vtkTesting::Test(argc, argv, renwin, 5.0);
if (retVal == vtkRegressionTester::DO_INTERACTOR)
{
VTK_CREATE(vtkRenderWindowInteractor, iren);
iren->SetRenderWindow(renwin);
iren->Initialize();
iren->Start();
retVal = vtkRegressionTester::PASSED;
}
if (retVal == vtkRegressionTester::PASSED)
{
return 0;
}
else
{
return 1;
}
}
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