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vtkPExtractGrid.cxx
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vtkPExtractGrid.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPExtractGrid.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 "vtkPExtractGrid.h"
// VTK includes
#include "vtkStructuredExtent.h"
#include "vtkExtractStructuredGridHelper.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMPIController.h"
#include "vtkMPIUtilities.h"
#include "vtkMultiProcessController.h"
#include "vtkMultiProcessController.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkStructuredGrid.h"
#include "vtkStructuredImplicitConnectivity.h"
// C/C++ includes
#include <cassert>
#include <sstream>
// Some useful extent macros
#define EMIN(ext, dim) (ext[2*dim])
#define EMAX(ext, dim) (ext[2*dim+1])
// #define DEBUG
#ifdef DEBUG
#define DEBUG_EXTENT(label, extent) \
if (this->Controller) \
{ \
vtkMPIUtilities::SynchronizedPrintf( \
this->Controller, #label "=[%d,%d,%d,%d,%d,%d]\n", \
extent[0], extent[1], extent[2], extent[3], extent[4], extent[5]); \
} \
else \
{ \
std::cout << label << "=[" \
<< extent[0] << "," << extent[1] << "," \
<< extent[2] << "," << extent[3] << "," \
<< extent[4] << "," << extent[5] << "]\n"; \
}
#define DEBUG_OUT(out) \
if (this->Controller) \
{ \
std::ostringstream tmpStreamOut; \
tmpStreamOut << out; \
vtkMPIUtilities::SynchronizedPrintf(this->Controller, \
tmpStreamOut.str().c_str()); \
} \
else \
{ \
std::cout << out; \
}
#else // DEBUG
#define DEBUG_EXTENT(label, extent)
#define DEBUG_OUT(out)
#endif // DEBUG
vtkStandardNewMacro(vtkPExtractGrid);
//------------------------------------------------------------------------------
vtkPExtractGrid::vtkPExtractGrid()
{
this->Controller = vtkMPIController::SafeDownCast(
vtkMultiProcessController::GetGlobalController());
}
//------------------------------------------------------------------------------
vtkPExtractGrid::~vtkPExtractGrid()
{
}
//------------------------------------------------------------------------------
void vtkPExtractGrid::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
//------------------------------------------------------------------------------
int vtkPExtractGrid::RequestData(
vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
DEBUG_OUT("########### RequestData\n");
bool isSubSampling = this->SampleRate[0] != 1 ||
this->SampleRate[1] != 1 ||
this->SampleRate[2] != 1;
// No MPI, or no subsampling? Just run the serial implementation.
if (!this->Controller || !isSubSampling)
{
return this->Superclass::RequestData(request, inputVector, outputVector);
}
if (!this->Internal->IsValid())
{
return 0;
}
// Collect information:
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
int inputWholeExtent[6];
inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),
inputWholeExtent);
int outputWholeExtent[6];
outInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),
outputWholeExtent);
vtkStructuredGrid *input = vtkStructuredGrid::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkStructuredGrid *output = vtkStructuredGrid::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
int inputExtent[6];
input->GetExtent(inputExtent);
// Clamp the global VOI to the whole extent:
int globalVOI[6];
std::copy(this->VOI, this->VOI + 6, globalVOI);
vtkStructuredExtent::Clamp(globalVOI, inputWholeExtent);
// 1D Example:
// InputWholeExtent = [0, 20]
// GlobalVOI = [3, 17]
// SampleRate = 2
// OutputWholeExtent = [0, 7]
// Processes = 2
//
// Process 0:
// PartitionedInputExtent = [0, 10]
// PartitionedVOI = [3, 9] (due to sampling)
// OutputExtent = [0, 3]
// SerialOutputExtent = [0, 3]
// FinalOutputExtent = [0, 4] (after gap closing)
//
// Process 1:
// PartitionedInputExtent = [10, 20]
// PartitionedVOI = [11, 17] (offset due to sampling)
// OutputExtent = [4, 7]
// SerialOutputExtent = [0, 3]
// FinalOutputExtent = [4, 7]
//
// This filter should:
// 1) Compute ParititonedVOI that will allow the base class to produce as much
// of the output data set as possible from the partitioned piece.
//
// 2) Update the output dataset's extents to match PartitionedOutputExtent (it
// will be [0, L] in each dimension by default).
//
// 3) Extract PartitionedVOI using the base class's implementation.
//
// 4) Close gaps using vtkStructuredImplicitConnectivity (e.g. [3, 4] in the
// above example).
bool partitionContainsVOI = true;
for (int dim = 0; partitionContainsVOI && dim < 3; ++dim)
{
partitionContainsVOI = EMAX(inputExtent, dim) >= EMIN(globalVOI, dim) &&
EMIN(inputExtent, dim) <= EMAX(globalVOI, dim);
}
DEBUG_EXTENT("InputWholeExtent", inputWholeExtent);
DEBUG_EXTENT("OutputWholeExtent", outputWholeExtent);
DEBUG_EXTENT("GlobalVOI", globalVOI);
DEBUG_EXTENT("InputPartitionedExtent", inputExtent);
int partitionedVOI[6] = {0, -1, 0, -1, 0, -1};
int partitionedOutputExtent[6] = {0, -1, 0, -1, 0, -1};
if (partitionContainsVOI)
{
////////////////////////////////////////////////////////////////
// 1) Compute actual VOI for aligning the partitions outputs: //
////////////////////////////////////////////////////////////////
vtkExtractStructuredGridHelper::GetPartitionedVOI(
globalVOI, inputExtent, this->SampleRate, this->IncludeBoundary != 0,
partitionedVOI);
}
DEBUG_EXTENT("PartitionedVOI", partitionedVOI);
if (partitionContainsVOI)
{
////////////////////////////////////////////////////////////////
// 2) Compute and update the output dataset's actual extents. //
////////////////////////////////////////////////////////////////
vtkExtractStructuredGridHelper::GetPartitionedOutputExtent(
globalVOI, partitionedVOI, outputWholeExtent, this->SampleRate,
this->IncludeBoundary != 0, partitionedOutputExtent);
output->SetExtent(partitionedOutputExtent);
}
DEBUG_EXTENT("PartitionedOutputExtent", partitionedOutputExtent);
if (partitionContainsVOI)
{
////////////////////////////////////////////////////////////
// 3) Extract actual VOI using superclass implementation: //
////////////////////////////////////////////////////////////
if (!this->Superclass::RequestDataImpl(inputVector, outputVector))
{
return 0;
}
}
//////////////////////////////
// 4: Detect & resolve gaps //
//////////////////////////////
vtkStructuredImplicitConnectivity* gridConnectivity =
vtkStructuredImplicitConnectivity::New();
gridConnectivity->SetWholeExtent(outputWholeExtent);
// Register the grid, grid ID is the same as the process ID
gridConnectivity->RegisterGrid(
this->Controller->GetLocalProcessId(),
output->GetExtent(),
output->GetPoints(),
output->GetPointData()
);
// Establish neighbor connectivity & detect any gaps
gridConnectivity->EstablishConnectivity();
// Check if there are any gaps, if any close them now
if( gridConnectivity->HasImplicitConnectivity() )
{
DEBUG_OUT("Closing gaps...\n");
// there are gaps, grow the grid to the right
gridConnectivity->ExchangeData();
gridConnectivity->GetOutputStructuredGrid(
this->Controller->GetLocalProcessId(),output);
}
gridConnectivity->Delete();
#ifdef DEBUG
int finalOutputExtent[6];
output->GetExtent(finalOutputExtent);
DEBUG_EXTENT("FinalOutputExtent", finalOutputExtent);
#endif
return 1;
}
//------------------------------------------------------------------------------
int vtkPExtractGrid::RequestInformation(
vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
DEBUG_OUT("########### RequestInformation\n");
return this->Superclass::RequestInformation(request, inputVector,
outputVector);
}
//------------------------------------------------------------------------------
int vtkPExtractGrid::RequestUpdateExtent(
vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
DEBUG_OUT("########### RequestUpdateExtent\n");
return this->Superclass::RequestUpdateExtent(request, inputVector,
outputVector);
}