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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkAggregateDataSetFilter.h"
#include "vtkAppendFilter.h"
#include "vtkAppendPolyData.h"
#include "vtkCommunicator.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMultiProcessController.h"
#include "vtkNew.h"
#include "vtkObjectFactory.h"
#include "vtkPolyData.h"
#include "vtkSmartPointer.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkUnstructuredGrid.h"
VTK_ABI_NAMESPACE_BEGIN
vtkObjectFactoryNewMacro(vtkAggregateDataSetFilter);
//------------------------------------------------------------------------------
vtkAggregateDataSetFilter::vtkAggregateDataSetFilter()
{
this->NumberOfTargetProcesses = 1;
}
//------------------------------------------------------------------------------
vtkAggregateDataSetFilter::~vtkAggregateDataSetFilter() = default;
//------------------------------------------------------------------------------
void vtkAggregateDataSetFilter::SetNumberOfTargetProcesses(int tp)
{
if (tp != this->NumberOfTargetProcesses)
{
int numProcs = vtkMultiProcessController::GetGlobalController()->GetNumberOfProcesses();
if (tp > 0 && tp <= numProcs)
{
this->NumberOfTargetProcesses = tp;
this->Modified();
}
else if (tp <= 0 && this->NumberOfTargetProcesses != 1)
{
this->NumberOfTargetProcesses = 1;
this->Modified();
}
else if (tp > numProcs && this->NumberOfTargetProcesses != numProcs)
{
this->NumberOfTargetProcesses = numProcs;
this->Modified();
}
}
}
//------------------------------------------------------------------------------
int vtkAggregateDataSetFilter::FillInputPortInformation(int, vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkDataSet");
info->Set(vtkAlgorithm::INPUT_IS_OPTIONAL(), 1);
return 1;
}
//------------------------------------------------------------------------------
// We should avoid marshalling more than once.
int vtkAggregateDataSetFilter::RequestData(
vtkInformation*, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
vtkDataSet* input = nullptr;
vtkDataSet* output = vtkDataSet::GetData(outputVector, 0);
if (inputVector[0]->GetNumberOfInformationObjects() > 0)
{
input = vtkDataSet::GetData(inputVector[0], 0);
}
vtkMultiProcessController* controller = vtkMultiProcessController::GetGlobalController();
int numberOfProcesses = controller->GetNumberOfProcesses();
if (numberOfProcesses == this->NumberOfTargetProcesses)
{
if (input)
{
output->ShallowCopy(input);
}
return 1;
}
if (input->IsA("vtkImageData") || input->IsA("vtkRectilinearGrid") ||
input->IsA("vtkStructuredGrid"))
{
vtkErrorMacro("Must build with the vtkFiltersParallelDIY2 module enabled to "
<< "aggregate topologically regular grids with MPI");
return 0;
}
// create a subcontroller to simplify communication between the processes
// that are aggregating data
vtkSmartPointer<vtkMultiProcessController> subController = nullptr;
if (this->NumberOfTargetProcesses == 1)
{
subController = controller;
}
else
{
int localProcessId = controller->GetLocalProcessId();
int numberOfProcessesPerGroup = numberOfProcesses / this->NumberOfTargetProcesses;
int localColor = localProcessId / numberOfProcessesPerGroup;
if (numberOfProcesses % this->NumberOfTargetProcesses)
{
double d = 1. * numberOfProcesses / this->NumberOfTargetProcesses;
localColor = int(localProcessId / d);
}
subController.TakeReference(controller->PartitionController(localColor, 0));
}
int subNumProcs = subController->GetNumberOfProcesses();
int subRank = subController->GetLocalProcessId();
std::vector<vtkIdType> pointCount(subNumProcs, 0);
vtkIdType numPoints = input->GetNumberOfPoints();
subController->AllGather(&numPoints, pointCount.data(), 1);
// The first process in the subcontroller to have points is the one that data will
// be aggregated to. All of the other processes send their data set to that process.
int receiveProc = 0;
vtkIdType maxVal = 0;
for (int i = 0; i < subNumProcs; i++)
{
if (pointCount[i] > maxVal)
{
maxVal = pointCount[i];
receiveProc = i;
}
}
std::vector<vtkSmartPointer<vtkDataObject>> recvBuffer;
#ifdef VTKAGGREGATEDATASETFILTER_USE_GATHER
subController->Gather(input, recvBuffer, receiveProc);
#else
// by default, we don't use gather to avoid paraview/paraview#19937.
if (subRank == receiveProc)
{
recvBuffer.emplace_back(input);
for (int cc = 0; cc < (subNumProcs - 1); ++cc)
{
recvBuffer.push_back(vtkSmartPointer<vtkDataObject>::Take(
subController->ReceiveDataObject(vtkMultiProcessController::ANY_SOURCE, 909911)));
}
}
else
{
subController->Send(input, receiveProc, 909911);
}
#endif
if (subRank == receiveProc)
{
if (recvBuffer.size() == 1)
{
output->ShallowCopy(input);
}
else if (input->IsA("vtkPolyData"))
{
vtkNew<vtkAppendPolyData> appendFilter;
for (std::vector<vtkSmartPointer<vtkDataObject>>::iterator it = recvBuffer.begin();
it != recvBuffer.end(); ++it)
{
appendFilter->AddInputData(vtkPolyData::SafeDownCast(*it));
}
appendFilter->Update();
output->ShallowCopy(appendFilter->GetOutput());
}
else if (input->IsA("vtkUnstructuredGrid"))
{
vtkNew<vtkAppendFilter> appendFilter;
appendFilter->SetMergePoints(this->MergePoints);
for (std::vector<vtkSmartPointer<vtkDataObject>>::iterator it = recvBuffer.begin();
it != recvBuffer.end(); ++it)
{
appendFilter->AddInputData(*it);
}
appendFilter->Update();
output->ShallowCopy(appendFilter->GetOutput());
}
}
return 1;
}
//------------------------------------------------------------------------------
void vtkAggregateDataSetFilter::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "NumberOfTargetProcesses: " << this->NumberOfTargetProcesses << endl;
}
VTK_ABI_NAMESPACE_END
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