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//####//------------------------------------------------------------ |
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//####//------------------------------------------------------------ |
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//####// MAGiC |
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//####// Jean Christophe Cuilliere et Vincent FRANCOIS |
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//####// Departement de Genie Mecanique - UQTR |
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//####//------------------------------------------------------------ |
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//####// MAGIC est un projet de recherche de l equipe ERICCA |
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//####// du departement de genie mecanique de l Universite du Quebec a Trois Rivieres |
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//####// http://www.uqtr.ca/ericca |
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//####// http://www.uqtr.ca/ |
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//####//------------------------------------------------------------ |
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//####//------------------------------------------------------------ |
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//####// |
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//####// hypergraphlib_filaments.cpp |
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//####// |
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//####//------------------------------------------------------------ |
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//####//------------------------------------------------------------ |
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//####// COPYRIGHT 2000-2024 |
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//####// jeu 13 jun 2024 11:54:00 EDT |
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//####//------------------------------------------------------------ |
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//####//------------------------------------------------------------ |
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#include <stdlib.h> |
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#include "hypergraphlib_platform.h" |
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|
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#include "hypergraphlib_graph.h" |
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#include "hypergraphlib_node.h" |
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#include "hypergraphlib_arc.h" |
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|
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#include <set> |
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#include <vector> |
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#include <map> |
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|
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|
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/** |
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* Algorithme de d�composition d'un graphe en filaments |
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*/ |
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|
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namespace HypergraphLib { |
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|
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HYPERGRAPHLIB_ITEM void |
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Filaments ( Graph * G, std::vector < std::vector < int > > & __filaments ) |
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{ |
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std::set <int> visited; |
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std::set <int> next; |
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std::vector <int> filament; |
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std::set <int> unvisited; |
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std::set <int> adjacentNodes; |
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|
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// Initialize the set of unvisited nodes |
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for (Graph::MapNodesById::const_iterator itNodes = G->GetNodes().begin(); |
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itNodes != G->GetNodes().end(); |
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itNodes++ ) |
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{ |
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unvisited.insert (itNodes->first); |
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} |
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|
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while (unvisited.size() > 0) |
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{ |
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Node * N = G->GetNode(*(unvisited.begin())); |
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for (std::set<int>::const_iterator itAN = unvisited.begin(); |
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itAN != unvisited.end(); |
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itAN++ ) |
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{ |
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Node * N2 = G->GetNode(*itAN); |
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if (N2->IncidentArcs().size() == 1) |
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{ |
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N = N2; |
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break; |
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} |
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} |
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|
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visited.insert(N->Id()); |
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unvisited.erase(unvisited.find(N->Id())); |
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next.clear(); |
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adjacentNodes.clear(); |
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N->AdjacentNodes(adjacentNodes); |
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for (std::set<int>::const_iterator itAN = adjacentNodes.begin(); |
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itAN != adjacentNodes.end(); |
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itAN++ ) |
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{ |
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if ( visited.find (*itAN) == visited.end() ) |
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{ |
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next.insert (*itAN); |
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break; |
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} |
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} |
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filament.clear(); |
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filament.push_back (N->Id()); |
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|
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while (next.size() > 0) |
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{ |
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N = G->GetNode(*(next.begin())); |
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visited.insert(N->Id()); |
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unvisited.erase(unvisited.find(N->Id())); |
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adjacentNodes.clear(); |
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next.clear(); |
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filament.push_back (N->Id()); |
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|
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N->AdjacentNodes(adjacentNodes); |
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for (std::set<int>::const_iterator itAN = adjacentNodes.begin(); |
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itAN != adjacentNodes.end(); |
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itAN++ ) |
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{ |
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if ( visited.find (*itAN) == visited.end() ) |
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{ |
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int count_filament_adjacency = 0; |
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std::vector<int>::const_iterator it_fil = filament.begin(); |
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bool is_adjacent_to_start=false; |
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bool is_adjacent_to_end=false; |
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Node * fN=NULL; |
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|
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it_fil = filament.begin(); |
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fN = G->GetNode (*it_fil); |
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is_adjacent_to_start = fN->IsAdjacentToNode(*itAN); |
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|
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|
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it_fil = filament.end(); |
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it_fil--; |
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fN = G->GetNode (*it_fil); |
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is_adjacent_to_end = fN->IsAdjacentToNode(*itAN); |
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|
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for ( it_fil = filament.begin(); |
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it_fil != filament.end(); it_fil++) |
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{ |
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fN = G->GetNode (*it_fil); |
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if (fN->IsAdjacentToNode(*itAN)) |
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count_filament_adjacency++; |
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} |
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it_fil = filament.end(); |
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it_fil--; |
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it_fil = filament.begin(); |
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|
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bool is_not_T = true; |
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if ( is_adjacent_to_end && is_adjacent_to_start) |
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{ |
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|
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for ( it_fil = filament.begin(); |
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it_fil != filament.end(); it_fil++) |
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{ |
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fN = G->GetNode (*it_fil); |
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for ( Node::MultimapArcsById::const_iterator itArcs = fN->IncidentArcs().begin(); |
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itArcs != fN->IncidentArcs().end(); |
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itArcs++ ) |
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{ |
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Arc * arc = itArcs->second; |
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|
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if ( arc->Nodes().find(*itAN) != arc->Nodes().end() |
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&& arc->Nodes().find(filament[0]) != arc->Nodes().end() |
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&& arc->Nodes().find(filament[filament.size()-1]) != arc->Nodes().end() ) |
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{ |
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is_not_T = false; |
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} |
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} |
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} |
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|
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} |
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|
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if (count_filament_adjacency == 1 || ( is_adjacent_to_end && is_adjacent_to_start && is_not_T) ) |
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{ |
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next.insert (*itAN); |
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break; |
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} |
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} |
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} |
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} |
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__filaments.push_back(filament); |
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} |
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|
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} |
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} |
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|
