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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkStructuredGridPartitioner.h"
#include "vtkExtentRCBPartitioner.h"
#include "vtkIndent.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkObjectFactory.h"
#include "vtkPoints.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkStructuredData.h"
#include "vtkStructuredExtent.h"
#include "vtkStructuredGrid.h"
#include <cassert>
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkStructuredGridPartitioner);
//------------------------------------------------------------------------------
vtkStructuredGridPartitioner::vtkStructuredGridPartitioner()
{
this->NumberOfPartitions = 2;
this->NumberOfGhostLayers = 0;
this->DuplicateNodes = 1;
this->SetNumberOfInputPorts(1);
this->SetNumberOfOutputPorts(1);
}
//------------------------------------------------------------------------------
vtkStructuredGridPartitioner::~vtkStructuredGridPartitioner() = default;
//------------------------------------------------------------------------------
void vtkStructuredGridPartitioner::PrintSelf(std::ostream& oss, vtkIndent indent)
{
this->Superclass::PrintSelf(oss, indent);
oss << "NumberOfPartitions: " << this->NumberOfPartitions << std::endl;
oss << "NumberOfGhostLayers: " << this->NumberOfGhostLayers << std::endl;
oss << "DuplicateNodes: " << this->DuplicateNodes << std::endl;
}
//------------------------------------------------------------------------------
int vtkStructuredGridPartitioner::FillInputPortInformation(
int vtkNotUsed(port), vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkStructuredGrid");
return 1;
}
//------------------------------------------------------------------------------
int vtkStructuredGridPartitioner::FillOutputPortInformation(
int vtkNotUsed(port), vtkInformation* info)
{
info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkMultiBlockDataSet");
return 1;
}
//------------------------------------------------------------------------------
vtkPoints* vtkStructuredGridPartitioner::ExtractSubGridPoints(
vtkStructuredGrid* wholeGrid, int subext[6])
{
assert("pre: whole grid is nullptr" && (wholeGrid != nullptr));
int numNodes = vtkStructuredData::GetNumberOfPoints(subext);
vtkPoints* pnts = vtkPoints::New();
pnts->SetDataTypeToDouble();
pnts->SetNumberOfPoints(numNodes);
int ijk[3];
double p[3];
int dataDescription = vtkStructuredData::GetDataDescriptionFromExtent(subext);
for (int i = subext[0]; i <= subext[1]; ++i)
{
for (int j = subext[2]; j <= subext[3]; ++j)
{
for (int k = subext[4]; k <= subext[5]; ++k)
{
wholeGrid->GetPoint(i, j, k, p, false);
ijk[0] = i;
ijk[1] = j;
ijk[2] = k;
vtkIdType pntIdx = vtkStructuredData::ComputePointIdForExtent(subext, ijk, dataDescription);
assert("pre: point index is out-of-bounds!" && (pntIdx >= 0) && (pntIdx < numNodes));
pnts->SetPoint(pntIdx, p);
} // END for all k
} // END for all j
} // END for all i
return (pnts);
}
//------------------------------------------------------------------------------
int vtkStructuredGridPartitioner::RequestData(vtkInformation* vtkNotUsed(request),
vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
// STEP 0: Get input object
vtkInformation* input = inputVector[0]->GetInformationObject(0);
assert("pre: input information object is nullptr" && (input != nullptr));
vtkStructuredGrid* grd =
vtkStructuredGrid::SafeDownCast(input->Get(vtkDataObject::DATA_OBJECT()));
// STEP 1: Get output object
vtkInformation* output = outputVector->GetInformationObject(0);
assert("pre: output information object is nullptr" && (output != nullptr));
vtkMultiBlockDataSet* multiblock =
vtkMultiBlockDataSet::SafeDownCast(output->Get(vtkDataObject::DATA_OBJECT()));
assert("pre: multi-block grid is nullptr" && (multiblock != nullptr));
// STEP 2: Get the global extent
int extent[6];
grd->GetExtent(extent);
// STEP 3: Setup extent partitioner
vtkExtentRCBPartitioner* extentPartitioner = vtkExtentRCBPartitioner::New();
assert("pre: extent partitioner is nullptr" && (extentPartitioner != nullptr));
extentPartitioner->SetGlobalExtent(extent);
extentPartitioner->SetNumberOfPartitions(this->NumberOfPartitions);
extentPartitioner->SetNumberOfGhostLayers(this->NumberOfGhostLayers);
if (this->DuplicateNodes == 1)
{
extentPartitioner->DuplicateNodesOn();
}
else
{
extentPartitioner->DuplicateNodesOff();
}
// STEP 4: Partition
extentPartitioner->Partition();
// STEP 5: Extract partitions in a multi-block
multiblock->SetNumberOfBlocks(extentPartitioner->GetNumExtents());
// Set the whole extent of the grid
multiblock->GetInformation()->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(), extent, 6);
int subext[6];
unsigned int blockIdx = 0;
for (; blockIdx < multiblock->GetNumberOfBlocks(); ++blockIdx)
{
if (this->CheckAbort())
{
break;
}
extentPartitioner->GetPartitionExtent(blockIdx, subext);
vtkStructuredGrid* subgrid = vtkStructuredGrid::New();
subgrid->SetExtent(subext);
vtkPoints* points = this->ExtractSubGridPoints(grd, subext);
assert("pre: subgrid points are nullptr" && (points != nullptr));
subgrid->SetPoints(points);
points->Delete();
vtkInformation* metadata = multiblock->GetMetaData(blockIdx);
assert("pre: metadata is nullptr" && (metadata != nullptr));
metadata->Set(vtkDataObject::PIECE_EXTENT(), subext, 6);
multiblock->SetBlock(blockIdx, subgrid);
subgrid->Delete();
} // END for all blocks
extentPartitioner->Delete();
return 1;
}
VTK_ABI_NAMESPACE_END
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