110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
/* ----------------------------------------------------------------------------
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* GTSAM Copyright 2010, Georgia Tech Research Corporation,
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* Atlanta, Georgia 30332-0415
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* All Rights Reserved
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* Authors: Frank Dellaert, et al. (see THANKS for the full author list)
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* See LICENSE for the license information
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* -------------------------------------------------------------------------- */
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/*
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* graph.h
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* @brief Graph algorithm using boost library
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* @author: Kai Ni
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* Created on: Jan 11, 2010
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*/
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#pragma once
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#include <map>
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#define BOOST_NO_HASH // to pacify the warnings about depricated headers in boost.graph
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#include <boost/graph/graph_traits.hpp>
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#include <boost/graph/adjacency_list.hpp>
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#include <boost/shared_ptr.hpp>
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namespace gtsam {
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// type definitions :
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/**
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* SDGraph is undirected graph with variable keys and double edge weights
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*/
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template<class KEY>
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class SDGraph: public boost::adjacency_list<boost::vecS, boost::vecS, boost::undirectedS,
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boost::property<boost::vertex_name_t, KEY>, boost::property<
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boost::edge_weight_t, double> > {
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public:
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typedef typename boost::graph_traits<SDGraph<KEY> >::vertex_descriptor Vertex;
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};
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template<class KEY>
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class SGraph : public boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS,
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boost::property<boost::vertex_name_t, KEY> > {
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public:
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typedef typename boost::graph_traits<SGraph<KEY> >::vertex_descriptor Vertex;
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};
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//typedef boost::graph_traits<SGraph>::vertex_descriptor SVertex;
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/**
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* Map from variable key to parent key
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*/
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template<class KEY>
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class PredecessorMap: public std::map<KEY, KEY> {
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public:
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/** convenience insert so we can pass ints for TypedSymbol keys */
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inline void insert(const KEY& key, const KEY& parent) {
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std::map<KEY, KEY>::insert(std::make_pair(key, parent));
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}
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};
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/**
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* Generate a list of keys from a spanning tree represented by its predecessor map
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*/
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template<class KEY>
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std::list<KEY> predecessorMap2Keys(const PredecessorMap<KEY>& p_map);
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/**
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* Convert the factor graph to an SDGraph
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* G = Graph type
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* F = Factor type
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* Key = Key type
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*/
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template<class G, class F, class KEY> SDGraph<KEY> toBoostGraph(const G& graph);
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/**
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* Build takes a predecessor map, and builds a directed graph corresponding to the tree.
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* G = Graph type
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* V = Vertex type
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*/
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template<class G, class V, class KEY>
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boost::tuple<G, V, std::map<KEY,V> > predecessorMap2Graph(const PredecessorMap<KEY>& p_map);
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/**
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* Compose the poses by following the chain specified by the spanning tree
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*/
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template<class G, class Factor, class POSE, class VALUES>
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boost::shared_ptr<VALUES>
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composePoses(const G& graph, const PredecessorMap<typename VALUES::Key>& tree, const POSE& rootPose);
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/**
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* find the minimum spanning tree using boost graph library
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*/
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template<class G, class KEY, class FACTOR2>
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PredecessorMap<KEY> findMinimumSpanningTree(const G& g) ;
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/**
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* Split the graph into two parts: one corresponds to the given spanning tree,
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* and the other corresponds to the rest of the factors
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*/
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template<class G, class KEY, class FACTOR2>
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void split(const G& g, const PredecessorMap<KEY>& tree, G& Ab1, G& Ab2) ;
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} // namespace gtsam
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