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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkConnectivityFilter.h"
#include "vtkCellData.h"
#include "vtkContourFilter.h"
#include "vtkDataSetTriangleFilter.h"
#include "vtkDistributedDataFilter.h"
#include "vtkGhostCellsGenerator.h"
#include "vtkIdTypeArray.h"
#include "vtkMPIController.h"
#include "vtkPConnectivityFilter.h"
#include "vtkRemoveGhosts.h"
#include "vtkStructuredPoints.h"
#include "vtkStructuredPointsReader.h"
#include "vtkTestUtilities.h"
#include "vtkUnstructuredGrid.h"
#include <vtk_mpi.h>
int RunParallelConnectivity(
const char* fname, vtkAlgorithm::DesiredOutputPrecision precision, vtkMPIController* contr)
{
int returnValue = EXIT_SUCCESS;
int me = contr->GetLocalProcessId();
vtkNew<vtkStructuredPointsReader> reader;
vtkDataSet* ds;
vtkSmartPointer<vtkUnstructuredGrid> ug = vtkSmartPointer<vtkUnstructuredGrid>::New();
if (me == 0)
{
std::cout << fname << std::endl;
reader->SetFileName(fname);
reader->Update();
ds = reader->GetOutput();
}
else
{
ds = ug;
}
vtkNew<vtkDistributedDataFilter> dd;
dd->SetInputData(ds);
dd->SetController(contr);
dd->UseMinimalMemoryOff();
dd->SetBoundaryModeToAssignToOneRegion();
vtkNew<vtkContourFilter> contour;
contour->SetInputConnection(dd->GetOutputPort());
contour->SetNumberOfContours(1);
contour->SetOutputPointsPrecision(precision);
contour->SetValue(0, 240.0);
vtkNew<vtkDataSetTriangleFilter> tetrahedralize;
tetrahedralize->SetInputConnection(contour->GetOutputPort());
vtkNew<vtkGhostCellsGenerator> ghostCells;
ghostCells->SetController(contr);
ghostCells->SetBuildIfRequired(false);
ghostCells->SetNumberOfGhostLayers(1);
ghostCells->SetInputConnection(tetrahedralize->GetOutputPort());
// Test factory override mechanism instantiated as a vtkPConnectivityFilter.
vtkNew<vtkConnectivityFilter> connectivity;
if (!connectivity->IsA("vtkPConnectivityFilter"))
{
std::cerr << "Expected vtkConnectivityFilter filter to be instantiated "
<< "as a vtkPConnectivityFilter with MPI support enabled, but "
<< "it is a " << connectivity->GetClassName() << " instead." << std::endl;
}
connectivity->SetInputConnection(ghostCells->GetOutputPort());
connectivity->Update();
// Remove ghost points/cells so that the cell count is the same regardless
// of the number of processes.
vtkNew<vtkRemoveGhosts> removeGhosts;
removeGhosts->SetInputConnection(connectivity->GetOutputPort());
// Check the number of regions
int numberOfRegions = connectivity->GetNumberOfExtractedRegions();
int expectedNumberOfRegions = 19;
if (numberOfRegions != expectedNumberOfRegions)
{
std::cerr << "Expected " << expectedNumberOfRegions << " regions but got " << numberOfRegions
<< std::endl;
returnValue = EXIT_FAILURE;
}
// Check that assigning RegionIds by number of cells (descending) works
connectivity->SetRegionIdAssignmentMode(vtkConnectivityFilter::CELL_COUNT_DESCENDING);
connectivity->ColorRegionsOn();
connectivity->SetExtractionModeToAllRegions();
removeGhosts->Update();
numberOfRegions = connectivity->GetNumberOfExtractedRegions();
vtkPointSet* ghostOutput = vtkPointSet::SafeDownCast(removeGhosts->GetOutput());
vtkIdType numberOfCells = ghostOutput->GetNumberOfCells();
vtkIdType globalNumberOfCells = 0;
contr->AllReduce(&numberOfCells, &globalNumberOfCells, 1, vtkCommunicator::SUM_OP);
std::vector<vtkIdType> regionCounts(connectivity->GetNumberOfExtractedRegions(), 0);
// Count up cells with RegionIds
vtkDataArray* regionIdArray = ghostOutput->GetCellData()->GetArray("RegionId");
auto regionIdRange = vtk::DataArrayValueRange(regionIdArray);
for (const auto regionId : regionIdRange)
{
regionCounts[regionId]++;
}
// Sum up region counts across processes
std::vector<vtkIdType> globalRegionCounts(regionCounts.size(), 0);
contr->AllReduce(regionCounts.data(), globalRegionCounts.data(),
static_cast<vtkIdType>(regionCounts.size()), vtkCommunicator::SUM_OP);
if (me == 0)
{
bool printCounts = false;
for (vtkIdType i = 1; i < numberOfRegions; ++i)
{
if (globalRegionCounts[i] > globalRegionCounts[i - 1])
{
std::cerr << "Region " << i << " is larger than region " << i - 1 << std::endl;
printCounts = true;
returnValue = EXIT_FAILURE;
break;
}
}
if (printCounts)
{
for (vtkIdType i = 0; i < numberOfRegions; ++i)
{
std::cout << "Region " << i << " has " << globalRegionCounts[i] << " cells" << std::endl;
}
}
}
// Check that assignment RegionIds by number of cells (ascending) works
connectivity->SetRegionIdAssignmentMode(vtkConnectivityFilter::CELL_COUNT_ASCENDING);
removeGhosts->Update();
std::fill(regionCounts.begin(), regionCounts.end(), 0);
regionIdArray = ghostOutput->GetCellData()->GetArray("RegionId");
regionIdRange = vtk::DataArrayValueRange(regionIdArray);
for (const auto regionId : regionIdRange)
{
regionCounts[regionId]++;
}
// Sum up region counts across processes
globalRegionCounts = std::vector<vtkIdType>(regionCounts.size(), 0);
contr->AllReduce(regionCounts.data(), globalRegionCounts.data(),
static_cast<vtkIdType>(regionCounts.size()), vtkCommunicator::SUM_OP);
if (me == 0)
{
bool printCounts = false;
for (vtkIdType i = 1; i < numberOfRegions; ++i)
{
if (globalRegionCounts[i] < globalRegionCounts[i - 1])
{
std::cerr << "Region " << i << " is smaller than " << i - 1 << std::endl;
printCounts = true;
returnValue = EXIT_FAILURE;
break;
}
}
if (printCounts)
{
for (vtkIdType i = 0; i < numberOfRegions; ++i)
{
std::cout << "Region " << i << " has " << globalRegionCounts[i] << " cells" << std::endl;
}
}
}
// Check the number of cells in the largest region when the extraction mode
// is set to largest region.
connectivity->SetExtractionModeToLargestRegion();
removeGhosts->Update();
numberOfCells = vtkPointSet::SafeDownCast(removeGhosts->GetOutput())->GetNumberOfCells();
globalNumberOfCells = 0;
contr->AllReduce(&numberOfCells, &globalNumberOfCells, 1, vtkCommunicator::SUM_OP);
int expectedNumberOfCells = 2124;
if (globalNumberOfCells != expectedNumberOfCells)
{
std::cerr << "Expected " << expectedNumberOfCells << " cells in largest "
<< "region bug got " << globalNumberOfCells << std::endl;
returnValue = EXIT_FAILURE;
}
// Closest point region test
connectivity->SetExtractionModeToClosestPointRegion();
removeGhosts->Update();
numberOfCells = vtkPointSet::SafeDownCast(removeGhosts->GetOutput())->GetNumberOfCells();
contr->AllReduce(&numberOfCells, &globalNumberOfCells, 1, vtkCommunicator::SUM_OP);
expectedNumberOfCells = 862; // point (0, 0, 0)
if (globalNumberOfCells != expectedNumberOfCells)
{
std::cerr << "Expected " << expectedNumberOfCells << " cells in closest "
<< "point extraction mode but got " << globalNumberOfCells << std::endl;
returnValue = EXIT_FAILURE;
}
return returnValue;
}
int ParallelConnectivity(int argc, char* argv[])
{
int returnValue = EXIT_SUCCESS;
MPI_Init(&argc, &argv);
// Note that this will create a vtkMPIController if MPI
// is configured, vtkThreadedController otherwise.
vtkMPIController* contr = vtkMPIController::New();
contr->Initialize(&argc, &argv, 1);
vtkMultiProcessController::SetGlobalController(contr);
char* fname = vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/ironProt.vtk");
if (RunParallelConnectivity(fname, vtkAlgorithm::SINGLE_PRECISION, contr) != EXIT_SUCCESS)
{
std::cerr << "Error running with vtkAlgorithm::SINGLE_PRECISION" << std::endl;
returnValue = EXIT_FAILURE;
}
if (RunParallelConnectivity(fname, vtkAlgorithm::DOUBLE_PRECISION, contr) != EXIT_SUCCESS)
{
std::cerr << "Error running with vtkAlgorithm::DOUBLE_PRECISION" << std::endl;
returnValue = EXIT_FAILURE;
}
delete[] fname;
contr->Finalize();
contr->Delete();
return returnValue;
}
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