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vtkBoostBreadthFirstSearchTree.cxx
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vtkBoostBreadthFirstSearchTree.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkBoostBreadthFirstSearchTree.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.
-------------------------------------------------------------------------*/
#include "vtkBoostBreadthFirstSearchTree.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkMath.h"
#include "vtkIdTypeArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkFloatArray.h"
#include "vtkDataArray.h"
#include "vtkSmartPointer.h"
#include "vtkStringArray.h"
#include "vtkBoostGraphAdapter.h"
#include "vtkMutableDirectedGraph.h"
#include "vtkUndirectedGraph.h"
#include "vtkTree.h"
#include <boost/graph/breadth_first_search.hpp>
#include <boost/graph/reverse_graph.hpp>
#include <boost/pending/queue.hpp>
using namespace boost;
vtkStandardNewMacro(vtkBoostBreadthFirstSearchTree);
#if BOOST_VERSION >= 104800 // Boost 1.48.x
namespace {
vtkIdType unwrap_edge_id(vtkEdgeType const &e)
{
return e.Id;
}
vtkIdType unwrap_edge_id(boost::detail::reverse_graph_edge_descriptor<vtkEdgeType> const &e)
{
# if BOOST_VERSION == 104800
return e.underlying_desc.Id;
# else
return e.underlying_descx.Id;
# endif
}
}
#endif
// Redefine the bfs visitor, the only visitor we
// are using is the tree_edge visitor.
template <typename IdMap>
class bfs_tree_builder : public default_bfs_visitor
{
public:
bfs_tree_builder()
{ }
bfs_tree_builder(IdMap& g2t, IdMap& t2g, vtkGraph* g, vtkMutableDirectedGraph* t, vtkIdType root)
: graph_to_tree(g2t), tree_to_graph(t2g), tree(t), graph(g)
{
double x[3];
graph->GetPoints()->GetPoint(root, x);
tree->GetPoints()->InsertNextPoint(x);
vtkIdType tree_root = t->AddVertex();
put(graph_to_tree, root, tree_root);
put(tree_to_graph, tree_root, root);
tree->GetVertexData()->CopyData(graph->GetVertexData(), root, tree_root);
}
template <typename Edge, typename Graph>
void tree_edge(Edge e, const Graph& g) const
{
typename graph_traits<Graph>::vertex_descriptor u, v;
u = source(e, g);
v = target(e, g);
// Get the source vertex id (it has already been visited).
vtkIdType tree_u = get(graph_to_tree, u);
// Add the point before the vertex so that
// points match the number of vertices, so that GetPoints()
// doesn't reallocate and zero-out points.
double x[3];
graph->GetPoints()->GetPoint(v, x);
tree->GetPoints()->InsertNextPoint(x);
// Create the target vertex in the tree.
vtkIdType tree_v = tree->AddVertex();
vtkEdgeType tree_e = tree->AddEdge(tree_u, tree_v);
// Store the mapping from graph to tree.
put(graph_to_tree, v, tree_v);
put(tree_to_graph, tree_v, v);
// Copy the vertex and edge data from the graph to the tree.
tree->GetVertexData()->CopyData(graph->GetVertexData(), v, tree_v);
#if BOOST_VERSION < 104800 // Boost 1.48.x
tree->GetEdgeData()->CopyData(graph->GetEdgeData(), e.Id, tree_e.Id);
#else
tree->GetEdgeData()->CopyData(graph->GetEdgeData(),
unwrap_edge_id(e), tree_e.Id);
#endif
}
private:
IdMap graph_to_tree;
IdMap tree_to_graph;
vtkMutableDirectedGraph *tree;
vtkGraph *graph;
};
// Constructor/Destructor
vtkBoostBreadthFirstSearchTree::vtkBoostBreadthFirstSearchTree()
{
// Default values for the origin vertex
this->OriginVertexIndex = 0;
this->ArrayName = 0;
this->SetArrayName("Not Set");
this->ArrayNameSet = false;
this->OriginValue = 0;
this->CreateGraphVertexIdArray = false;
this->ReverseEdges = false;
}
vtkBoostBreadthFirstSearchTree::~vtkBoostBreadthFirstSearchTree()
{
this->SetArrayName(NULL);
}
// Description:
// Set the index (into the vertex array) of the
// breadth first search 'origin' vertex.
void vtkBoostBreadthFirstSearchTree::SetOriginVertex(vtkIdType index)
{
this->OriginVertexIndex = index;
this->ArrayNameSet = false;
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 vtkBoostBreadthFirstSearchTree::SetOriginVertex(
vtkStdString arrayName, vtkVariant value)
{
this->SetArrayName(arrayName);
this->ArrayNameSet = true;
this->OriginValue = value;
this->Modified();
}
vtkIdType vtkBoostBreadthFirstSearchTree::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 vtkBoostBreadthFirstSearchTree::FillInputPortInformation(
int vtkNotUsed(port), vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkGraph");
return 1;
}
int vtkBoostBreadthFirstSearchTree::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()));
// Now figure out the origin vertex of the
// breadth first search
if (this->ArrayNameSet)
{
vtkAbstractArray* abstract = input->GetVertexData()->GetAbstractArray(this->ArrayName);
// Does the array exist at all?
if (abstract == NULL)
{
vtkErrorMacro("Could not find array named " << this->ArrayName);
return 0;
}
this->OriginVertexIndex = this->GetVertexIndex(abstract,this->OriginValue);
}
// Create tree to graph id map array
vtkIdTypeArray* treeToGraphIdMap = vtkIdTypeArray::New();
// Create graph to tree id map array
vtkIdTypeArray* graphToTreeIdMap = vtkIdTypeArray::New();
// Create a color map (used for marking visited nodes)
vector_property_map<default_color_type> color;
// Create a queue to hand off to the BFS
queue<int> q;
// Create the mutable graph to build the tree
vtkSmartPointer<vtkMutableDirectedGraph> temp =
vtkSmartPointer<vtkMutableDirectedGraph>::New();
// Initialize copying data into tree
temp->GetFieldData()->PassData(input->GetFieldData());
temp->GetVertexData()->CopyAllocate(input->GetVertexData());
temp->GetEdgeData()->CopyAllocate(input->GetEdgeData());
// Create the visitor which will build the tree
bfs_tree_builder<vtkIdTypeArray*> builder(
graphToTreeIdMap, treeToGraphIdMap, input, temp, this->OriginVertexIndex);
// Run the algorithm
if (vtkDirectedGraph::SafeDownCast(input))
{
vtkDirectedGraph *g = vtkDirectedGraph::SafeDownCast(input);
if (this->ReverseEdges)
{
#if BOOST_VERSION < 104100 // Boost 1.41.x
vtkErrorMacro("ReverseEdges requires Boost 1.41.x or higher");
return 0;
#else
boost::reverse_graph<vtkDirectedGraph*> r(g);
breadth_first_search(r, this->OriginVertexIndex, q, builder, color);
#endif
}
else
{
breadth_first_search(g, this->OriginVertexIndex, q, builder, color);
}
}
else
{
vtkUndirectedGraph *g = vtkUndirectedGraph::SafeDownCast(input);
breadth_first_search(g, this->OriginVertexIndex, q, builder, color);
}
// If the user wants it, store the mapping back to graph vertices
if (this->CreateGraphVertexIdArray)
{
treeToGraphIdMap->SetName("GraphVertexId");
temp->GetVertexData()->AddArray(treeToGraphIdMap);
}
// Copy the builder graph structure into the output tree
vtkTree *output = vtkTree::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
if (!output->CheckedShallowCopy(temp))
{
vtkErrorMacro(<<"Invalid tree.");
return 0;
}
// Clean up
output->Squeeze();
graphToTreeIdMap->Delete();
treeToGraphIdMap->Delete();
return 1;
}
void vtkBoostBreadthFirstSearchTree::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "OriginVertexIndex: " << this->OriginVertexIndex << endl;
os << indent << "ArrayName: "
<< (this->ArrayName ? this->ArrayName : "(none)") << endl;
os << indent << "OriginValue: " << this->OriginValue.ToString() << endl;
os << indent << "ArrayNameSet: "
<< (this->ArrayNameSet ? "true" : "false") << endl;
os << indent << "CreateGraphVertexIdArray: "
<< (this->CreateGraphVertexIdArray ? "on" : "off") << endl;
os << indent << "ReverseEdges: "
<< (this->ReverseEdges ? "on" : "off") << endl;
}