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/*=========================================================================
Program: Visualization Toolkit
Module: vtkRectilinearGridPartitioner.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.
=========================================================================*/
#include "vtkRectilinearGridPartitioner.h"
// VTK includes
#include "vtkDoubleArray.h"
#include "vtkExtentRCBPartitioner.h"
#include "vtkIndent.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkObjectFactory.h"
#include "vtkRectilinearGrid.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkStructuredData.h"
#include "vtkStructuredExtent.h"
#include <cassert>
vtkStandardNewMacro( vtkRectilinearGridPartitioner );
//------------------------------------------------------------------------------
vtkRectilinearGridPartitioner::vtkRectilinearGridPartitioner()
{
this->NumberOfPartitions = 2;
this->NumberOfGhostLayers = 0;
this->DuplicateNodes = 1;
this->SetNumberOfInputPorts(1);
this->SetNumberOfOutputPorts(1);
}
//------------------------------------------------------------------------------
vtkRectilinearGridPartitioner::~vtkRectilinearGridPartitioner()
{
}
//------------------------------------------------------------------------------
void vtkRectilinearGridPartitioner::PrintSelf(
std::ostream &oss, vtkIndent indent )
{
this->Superclass::PrintSelf( oss, indent );
oss << "NumberOfPartitions: " << this->NumberOfPartitions << std::endl;
oss << "NumberOfGhostLayers: " << this->NumberOfGhostLayers << std::endl;
}
//------------------------------------------------------------------------------
int vtkRectilinearGridPartitioner::FillInputPortInformation(
int vtkNotUsed(port), vtkInformation *info )
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(),"vtkRectilinearGrid");
return 1;
}
//------------------------------------------------------------------------------
int vtkRectilinearGridPartitioner::FillOutputPortInformation(
int vtkNotUsed(port), vtkInformation *info )
{
info->Set(vtkDataObject::DATA_TYPE_NAME(),"vtkMultiBlockDataSet");
return 1;
}
//------------------------------------------------------------------------------
void vtkRectilinearGridPartitioner::ExtractGridCoordinates(
vtkRectilinearGrid *grd, int subext[6],
vtkDoubleArray *xcoords, vtkDoubleArray *ycoords, vtkDoubleArray *zcoords )
{
assert("pre: NULL rectilinear grid" && (grd != NULL) );
assert("pre: NULL xcoords" && (xcoords != NULL) );
assert("pre: NULL ycoords" && (ycoords != NULL) );
assert("pre: NULL zcoords" && (zcoords != NULL) );
int dataDescription = vtkStructuredData::GetDataDescriptionFromExtent(subext);
int ndims[3];
vtkStructuredData::GetDimensionsFromExtent(subext,ndims,dataDescription );
vtkDoubleArray* coords[3];
coords[0] = xcoords;
coords[1] = ycoords;
coords[2] = zcoords;
vtkDataArray* src_coords[3];
src_coords[0] = grd->GetXCoordinates();
src_coords[1] = grd->GetYCoordinates();
src_coords[2] = grd->GetZCoordinates();
for(int dim=0; dim < 3; ++dim)
{
coords[ dim ]->SetNumberOfComponents( 1 );
coords[ dim ]->SetNumberOfTuples( ndims[ dim ] );
for(int idx=subext[dim*2]; idx <= subext[dim*2+1]; ++idx)
{
vtkIdType lidx = idx-subext[dim*2];
coords[ dim ]->SetTuple1(lidx,src_coords[dim]->GetTuple1(idx));
} // END for all ids
} // END for all dimensions
}
//------------------------------------------------------------------------------
int vtkRectilinearGridPartitioner::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 NULL" && (input != NULL) );
vtkRectilinearGrid *grd =
vtkRectilinearGrid::SafeDownCast(input->Get(vtkDataObject::DATA_OBJECT()));
// STEP 1: Get output object
vtkInformation *output = outputVector->GetInformationObject( 0 );
assert("pre: output information object is NULL" && (output != NULL) );
vtkMultiBlockDataSet *multiblock =
vtkMultiBlockDataSet::SafeDownCast(
output->Get(vtkDataObject::DATA_OBJECT()));
assert("pre: multi-block grid is NULL" && (multiblock != NULL) );
// 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 NULL" && (extentPartitioner != NULL) );
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 partition 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 )
{
extentPartitioner->GetPartitionExtent( blockIdx, subext );
vtkRectilinearGrid *subgrid = vtkRectilinearGrid::New();
subgrid->SetExtent( subext );
vtkDoubleArray *xcoords = vtkDoubleArray::New();
vtkDoubleArray *ycoords = vtkDoubleArray::New();
vtkDoubleArray *zcoords = vtkDoubleArray::New();
this->ExtractGridCoordinates(grd,subext,xcoords,ycoords,zcoords);
subgrid->SetXCoordinates( xcoords );
subgrid->SetYCoordinates( ycoords );
subgrid->SetZCoordinates( zcoords );
xcoords->Delete();
ycoords->Delete();
zcoords->Delete();
vtkInformation *metadata = multiblock->GetMetaData( blockIdx );
assert( "pre: metadata is NULL" && (metadata != NULL) );
metadata->Set( vtkDataObject::PIECE_EXTENT(), subext, 6);
multiblock->SetBlock(blockIdx, subgrid);
subgrid->Delete();
} // END for all blocks
extentPartitioner->Delete();
return 1;
}
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