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/*=========================================================================
Program: Visualization Toolkit
Module: TestScalarsToColorsPainterFieldData.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 tests coloring by a field data
#include "vtkActor.h"
#include "vtkColorTransferFunction.h"
#include "vtkDataArray.h"
#include "vtkFieldData.h"
#include "vtkFloatArray.h"
#include "vtkNew.h"
#include "vtkPainterPolyDataMapper.h"
#include "vtkPointData.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSphereSource.h"
#include "vtkStripper.h"
#include "vtkTestUtilities.h"
int TestScalarsToColorsPainterFieldData(int argc, char* argv[])
{
vtkIdType tupleId = -1;
if (argc > 1)
{
tupleId = atoi(argv[1]);
}
// Set up sphere source
vtkNew<vtkSphereSource> sphere;
sphere->SetPhiResolution(8);
sphere->SetThetaResolution(8);
sphere->Update();
// Add a field data array
vtkPolyData* pd = sphere->GetOutput();
vtkFieldData* fd = pd->GetFieldData();
vtkNew<vtkFloatArray> newArray;
newArray->SetName("floatArray");
newArray->SetNumberOfComponents(1);
newArray->SetNumberOfTuples(pd->GetNumberOfCells());
for (vtkIdType i = 0; i < pd->GetNumberOfCells(); ++i)
{
float value = static_cast<float>(i);
newArray->SetTuple(i, &value);
}
fd->AddArray(newArray.GetPointer());
// Set up lookup table
vtkNew<vtkColorTransferFunction> lookupTable;
lookupTable->AddRGBPoint(0.0, 1.0, 1.0, 1.0);
lookupTable->AddRGBPoint(static_cast<float>(pd->GetNumberOfCells()), 1.0, 0.0, 0.0);
vtkNew<vtkPainterPolyDataMapper> mapper;
mapper->SetInputData(pd);
mapper->SetLookupTable(lookupTable.GetPointer());
mapper->SelectColorArray("floatArray");
mapper->SetScalarModeToUseFieldData();
mapper->SetFieldDataTupleId(tupleId);
mapper->ScalarVisibilityOn();
vtkNew<vtkActor> actor;
actor->SetMapper(mapper.GetPointer());
// Render image
vtkNew<vtkRenderer> renderer;
renderer->AddActor(actor.GetPointer());
vtkNew<vtkRenderWindow> renWin;
renWin->SetMultiSamples(0);
renWin->SetAlphaBitPlanes(1);
renWin->AddRenderer(renderer.GetPointer());
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renWin.GetPointer());
// Compare image
int retVal = vtkRegressionTestImage(renWin.GetPointer());
if (retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
return !retVal;
}
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