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vtkBoostBreadthFirstSearch.cxx
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vtkBoostBreadthFirstSearch.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkBoostBreadthFirstSearch.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 "vtkBoostBreadthFirstSearch.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkConvertSelection.h"
#include "vtkMath.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkFloatArray.h"
#include "vtkDataArray.h"
#include "vtkSelection.h"
#include "vtkSelectionNode.h"
#include "vtkSmartPointer.h"
#include "vtkStringArray.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkBoostGraphAdapter.h"
#include "vtkDirectedGraph.h"
#include "vtkUndirectedGraph.h"
#include <boost/graph/visitors.hpp>
#include <boost/graph/breadth_first_search.hpp>
#include <boost/pending/queue.hpp>
#include <utility> // for pair
using namespace boost;
vtkStandardNewMacro(vtkBoostBreadthFirstSearch);
// Redefine the bfs visitor, the only visitor we
// are using is the tree_edge visitor.
template <typename DistanceMap>
class my_distance_recorder : public default_bfs_visitor
{
public:
my_distance_recorder() { }
my_distance_recorder(DistanceMap dist, vtkIdType* far)
: d(dist), far_vertex(far), far_dist(-1) { *far_vertex = -1; }
template <typename Vertex, typename Graph>
void examine_vertex(Vertex v, const Graph& vtkNotUsed(g))
{
if (get(d, v) > far_dist)
{
*far_vertex = v;
far_dist = get(d, v);
}
}
template <typename Edge, typename Graph>
void tree_edge(Edge e, const Graph& g)
{
typename graph_traits<Graph>::vertex_descriptor
u = source(e, g), v = target(e, g);
put(d, v, get(d, u) + 1);
}
private:
DistanceMap d;
vtkIdType* far_vertex;
vtkIdType far_dist;
};
// Constructor/Destructor
vtkBoostBreadthFirstSearch::vtkBoostBreadthFirstSearch()
{
// Default values for the origin vertex
this->OriginVertexIndex = 0;
this->InputArrayName = 0;
this->OutputArrayName = 0;
this->OutputSelectionType = 0;
this->SetOutputSelectionType("MAX_DIST_FROM_ROOT");
this->OriginValue = -1;
this->OutputSelection = false;
this->OriginFromSelection = false;
this->SetNumberOfInputPorts(2);
this->SetNumberOfOutputPorts(2);
}
vtkBoostBreadthFirstSearch::~vtkBoostBreadthFirstSearch()
{
this->SetInputArrayName(0);
this->SetOutputArrayName(0);
this->SetOutputSelectionType(0);
}
void vtkBoostBreadthFirstSearch::SetOriginSelection(vtkSelection* s)
{
this->SetInputData(1, s);
}
// Description:
// Set the index (into the vertex array) of the
// breadth first search 'origin' vertex.
void vtkBoostBreadthFirstSearch::SetOriginVertex(vtkIdType index)
{
this->OriginVertexIndex = index;
this->InputArrayName = nullptr; // Reset any origin set by another method
this->Modified();
}
// Description:
// Set the breadth first search 'origin' vertex.
// This method is basically the same as above
// but allows the application to simply specify
// an array name and value, instead of having to
// know the specific index of the vertex.
void vtkBoostBreadthFirstSearch::SetOriginVertex(
vtkStdString arrayName, vtkVariant value)
{
this->SetInputArrayName(arrayName);
this->OriginValue = value;
this->Modified();
}
void vtkBoostBreadthFirstSearch::SetOriginVertexString(
char* arrayName, char* value)
{
this->SetOriginVertex(arrayName, value);
}
vtkIdType vtkBoostBreadthFirstSearch::GetVertexIndex(
vtkAbstractArray *abstract,vtkVariant value)
{
// Okay now what type of array is it
if (abstract->IsNumeric())
{
vtkDataArray *dataArray = vtkArrayDownCast<vtkDataArray>(abstract);
int intValue = value.ToInt();
for(int i=0; i<dataArray->GetNumberOfTuples(); ++i)
{
if (intValue == static_cast<int>(dataArray->GetTuple1(i)))
{
return i;
}
}
}
else
{
vtkStringArray *stringArray = vtkArrayDownCast<vtkStringArray>(abstract);
vtkStdString stringValue(value.ToString());
for(int i=0; i<stringArray->GetNumberOfTuples(); ++i)
{
if (stringValue == stringArray->GetValue(i))
{
return i;
}
}
}
// Failed
vtkErrorMacro("Did not find a valid vertex index...");
return 0;
}
int vtkBoostBreadthFirstSearch::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);
// Sanity check
// The Boost BFS likes to crash on empty datasets
if (input->GetNumberOfVertices() == 0)
{
//vtkWarningMacro("Empty input into " << this->GetClassName());
return 1;
}
if (this->OriginFromSelection)
{
vtkSelection* selection = vtkSelection::GetData(inputVector[1], 0);
if (selection == nullptr)
{
vtkErrorMacro("OriginFromSelection set but selection input undefined.");
return 0;
}
vtkSmartPointer<vtkIdTypeArray> idArr =
vtkSmartPointer<vtkIdTypeArray>::New();
vtkConvertSelection::GetSelectedVertices(selection, input, idArr);
if (idArr->GetNumberOfTuples() == 0)
{
vtkErrorMacro("Origin selection is empty.");
return 0;
}
this->OriginVertexIndex = idArr->GetValue(0);
}
else
{
// Now figure out the origin vertex of the
// breadth first search
if (this->InputArrayName)
{
vtkAbstractArray* abstract = input->GetVertexData()->GetAbstractArray(this->InputArrayName);
// Does the array exist at all?
if (abstract == nullptr)
{
vtkErrorMacro("Could not find array named " << this->InputArrayName);
return 0;
}
this->OriginVertexIndex = this->GetVertexIndex(abstract,this->OriginValue);
}
}
// Create the attribute array
vtkIntArray* BFSArray = vtkIntArray::New();
if (this->OutputArrayName)
{
BFSArray->SetName(this->OutputArrayName);
}
else
{
BFSArray->SetName("BFS");
}
BFSArray->SetNumberOfTuples(output->GetNumberOfVertices());
// Initialize the BFS array to all 0's
for(int i=0;i< BFSArray->GetNumberOfTuples(); ++i)
{
BFSArray->SetValue(i, VTK_INT_MAX);
}
vtkIdType maxFromRootVertex = this->OriginVertexIndex;
// Create a color map (used for marking visited nodes)
vector_property_map<default_color_type> color(output->GetNumberOfVertices());
// Set the distance to the source vertex to zero
BFSArray->SetValue(this->OriginVertexIndex, 0);
// Create a queue to hand off to the BFS
boost::queue<int> Q;
my_distance_recorder<vtkIntArray*> bfsVisitor(BFSArray, &maxFromRootVertex);
// Is the graph directed or undirected
if (vtkDirectedGraph::SafeDownCast(output))
{
vtkDirectedGraph *g = vtkDirectedGraph::SafeDownCast(output);
breadth_first_search(g, this->OriginVertexIndex, Q, bfsVisitor, color);
}
else
{
vtkUndirectedGraph *g = vtkUndirectedGraph::SafeDownCast(output);
breadth_first_search(g, this->OriginVertexIndex, Q, bfsVisitor, color);
}
// Add attribute array to the output
output->GetVertexData()->AddArray(BFSArray);
BFSArray->Delete();
if (this->OutputSelection)
{
vtkSelection* sel = vtkSelection::GetData(outputVector, 1);
vtkIdTypeArray* ids = vtkIdTypeArray::New();
// Set the output based on the output selection type
if (!strcmp(OutputSelectionType,"MAX_DIST_FROM_ROOT"))
{
ids->InsertNextValue(maxFromRootVertex);
}
vtkSmartPointer<vtkSelectionNode> node = vtkSmartPointer<vtkSelectionNode>::New();
sel->AddNode(node);
node->SetSelectionList(ids);
node->GetProperties()->Set(vtkSelectionNode::CONTENT_TYPE(), vtkSelectionNode::INDICES);
node->GetProperties()->Set(vtkSelectionNode::FIELD_TYPE(), vtkSelectionNode::VERTEX);
ids->Delete();
}
return 1;
}
void vtkBoostBreadthFirstSearch::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "OriginVertexIndex: " << this->OriginVertexIndex << endl;
os << indent << "InputArrayName: "
<< (this->InputArrayName ? this->InputArrayName : "(none)") << endl;
os << indent << "OutputArrayName: "
<< (this->OutputArrayName ? this->OutputArrayName : "(none)") << endl;
os << indent << "OriginValue: " << this->OriginValue.ToString() << endl;
os << indent << "OutputSelection: "
<< (this->OutputSelection ? "on" : "off") << endl;
os << indent << "OriginFromSelection: "
<< (this->OriginFromSelection ? "on" : "off") << endl;
os << indent << "OutputSelectionType: "
<< (this->OutputSelectionType ? this->OutputSelectionType : "(none)") << endl;
}
//----------------------------------------------------------------------------
int vtkBoostBreadthFirstSearch::FillInputPortInformation(
int port, vtkInformation* info)
{
// now add our info
if (port == 0)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkGraph");
}
else if (port == 1)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkSelection");
info->Set(vtkAlgorithm::INPUT_IS_OPTIONAL(), 1);
}
return 1;
}
//----------------------------------------------------------------------------
int vtkBoostBreadthFirstSearch::FillOutputPortInformation(
int port, vtkInformation* info)
{
// now add our info
if (port == 0)
{
info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkGraph");
}
else if (port == 1)
{
info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkSelection");
}
return 1;
}