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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPBGLConnectedComponents.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.
=========================================================================*/
/*-------------------------------------------------------------------------
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
/*
* Copyright (C) 2008 The Trustees of Indiana University.
* Use, modification and distribution is subject to the Boost Software
* License, Version 1.0. (See http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/graph/use_mpi.hpp> // must precede PBGL headers
#include "vtkPBGLConnectedComponents.h"
#if !defined(VTK_LEGACY_REMOVE)
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkDataArray.h"
#include "vtkDirectedGraph.h"
#include "vtkDistributedGraphHelper.h"
#include "vtkFloatArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkPBGLGraphAdapter.h"
#include "vtkPBGLDistributedGraphHelper.h"
#include "vtkPointData.h"
#include "vtkSelection.h"
#include "vtkSmartPointer.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkStringArray.h"
#include "vtkType.h"
#include "vtkUndirectedGraph.h"
#include "vtkVertexListIterator.h"
#include <boost/graph/connected_components.hpp>
#include <boost/graph/distributed/connected_components.hpp>
#include <boost/graph/strong_components.hpp>
#include <boost/graph/distributed/strong_components.hpp>
#include <vtksys/stl/utility> // for pair
using namespace boost;
vtkStandardNewMacro(vtkPBGLConnectedComponents);
// Constructor/Destructor
vtkPBGLConnectedComponents::vtkPBGLConnectedComponents()
{
this->ComponentArrayName = 0;
this->SetNumberOfInputPorts(1);
this->SetNumberOfOutputPorts(1);
VTK_LEGACY_BODY(vtkPBGLConnectedComponents::vtkPBGLConnectedComponents, "VTK 6.2");
}
vtkPBGLConnectedComponents::~vtkPBGLConnectedComponents()
{
this->SetComponentArrayName(0);
}
int vtkPBGLConnectedComponents::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// get the input and output
vtkGraph *input = vtkGraph::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkGraph *output = vtkGraph::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
// Send the data to output.
output->ShallowCopy(input);
// Create the component array
vtkIdTypeArray* componentArray = vtkIdTypeArray::New();
if (this->ComponentArrayName)
{
componentArray->SetName(this->ComponentArrayName);
}
else
{
componentArray->SetName("Component");
}
componentArray->SetNumberOfTuples(output->GetNumberOfVertices());
vtkDistributedGraphHelper *helper = output->GetDistributedGraphHelper();
if (!helper)
{
vtkErrorMacro("Distributed vtkGraph is required.");
return 1;
}
// We can only deal with Parallel BGL-distributed graphs.
vtkPBGLDistributedGraphHelper *pbglHelper
= vtkPBGLDistributedGraphHelper::SafeDownCast(helper);
if (!pbglHelper)
{
vtkErrorMacro("Can only perform parallel shortest-paths on a Parallel BGL distributed graph");
return 1;
}
int myRank = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER());
// Distributed component map
typedef vtkDistributedVertexPropertyMapType<vtkIdTypeArray>::type
DistributedComponentMap;
DistributedComponentMap componentMap
= MakeDistributedVertexPropertyMap(output, componentArray);
// Execute the algorithm itself
if (vtkUndirectedGraph::SafeDownCast(output))
{
// Distributed parent map. Used for scratch space in the algorithm
// itself.
vtkIdTypeArray* parentArray = vtkIdTypeArray::New();
parentArray->SetNumberOfTuples(output->GetNumberOfVertices());
typedef vtkDistributedVertexPropertyMapType<vtkIdTypeArray>::type
DistributedParentMap;
DistributedParentMap parentMap
= MakeDistributedVertexPropertyMap(output, parentArray);
vtkUndirectedGraph *g = vtkUndirectedGraph::SafeDownCast(output);
boost::graph::distributed::cc_detail::parallel_connected_components
(g, parentMap);
boost::graph::distributed::number_components_from_parents(g, parentMap,
componentMap);
// Remove the temporary parent array.
parentArray->Delete();
}
else
{
vtkDirectedGraph *g = vtkDirectedGraph::SafeDownCast(output);
boost::graph::distributed::fleischer_hendrickson_pinar_strong_components
(g, componentMap, MakeDistributedVertexIndexMap(g));
}
// Add component array to the output
output->GetVertexData()->AddArray(componentArray);
componentArray->Delete();
return 1;
}
void vtkPBGLConnectedComponents::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "ComponentArrayName: "
<< (this->ComponentArrayName ? this->ComponentArrayName : "(none)")
<< endl;
}
//----------------------------------------------------------------------------
int vtkPBGLConnectedComponents::FillInputPortInformation(
int port, vtkInformation* info)
{
// now add our info
if (port == 0)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkGraph");
}
return 1;
}
//----------------------------------------------------------------------------
int vtkPBGLConnectedComponents::FillOutputPortInformation(
int port, vtkInformation* info)
{
// now add our info
if (port == 0)
{
info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkGraph");
}
return 1;
}
#endif //VTK_LEGACY_REMOVE
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