1 | /* -*- C++ -*- |
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2 | * demo/graph_orientation.cc - Part of LEMON, a generic C++ optimization library |
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3 | * |
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4 | * Copyright (C) 2006 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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5 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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6 | * |
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7 | * Permission to use, modify and distribute this software is granted |
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8 | * provided that this copyright notice appears in all copies. For |
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9 | * precise terms see the accompanying LICENSE file. |
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10 | * |
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11 | * This software is provided "AS IS" with no warranty of any kind, |
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12 | * express or implied, and with no claim as to its suitability for any |
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13 | * purpose. |
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14 | * |
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15 | */ |
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16 | |
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17 | |
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18 | #include <lemon/list_graph.h> |
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19 | #include <lemon/graph_reader.h> |
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20 | #include <lemon/iterable_maps.h> |
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21 | #include <lemon/xy.h> |
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22 | #include <lemon/graph_to_eps.h> |
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23 | |
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24 | |
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25 | using namespace lemon; |
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26 | |
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27 | |
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28 | typedef ListGraph::Node Node; |
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29 | typedef ListGraph::NodeIt NodeIt; |
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30 | typedef ListGraph::Edge Edge; |
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31 | typedef ListGraph::EdgeIt EdgeIt; |
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32 | typedef ListGraph::OutEdgeIt OutEdgeIt; |
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33 | typedef ListGraph::InEdgeIt InEdgeIt; |
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34 | |
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35 | int main(int argc, char** argv) |
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36 | { |
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37 | if(argc!=2) { |
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38 | std::cerr << "\n USAGE: " << argv[0] |
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39 | << " input_file.lgf" << std::endl << std::endl; |
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40 | std::cerr << " The file 'input_file.lgf' has to contain " |
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41 | << "at least three node maps called \n 'f', 'coordinates_x' " |
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42 | << "and 'coordinates_y'.\n" |
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43 | << " The in-degree requirement is given by 'f', while the two " |
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44 | << "others is used\n to create to output drawing." |
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45 | << std::endl; |
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46 | return 1; |
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47 | } |
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48 | |
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49 | ListGraph g; |
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50 | |
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51 | ListGraph::NodeMap<int> f(g); //in-deg requirement; |
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52 | ListGraph::NodeMap<int> id(g); |
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53 | ListGraph::NodeMap<xy<double> > coords(g); |
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54 | |
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55 | try { |
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56 | GraphReader<ListGraph> reader(argv[1],g); |
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57 | reader.readNodeMap("f",f); |
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58 | reader.readNodeMap("id",id); |
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59 | reader.readNodeMap("coordinates_x",xMap(coords)); |
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60 | reader.readNodeMap("coordinates_y",yMap(coords)); |
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61 | reader.run(); |
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62 | } catch (DataFormatError& error) { |
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63 | std::cerr << error.what() << std::endl; |
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64 | return 1; |
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65 | } |
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66 | |
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67 | |
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68 | ListGraph::NodeMap<int> level(g,0); |
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69 | |
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70 | ListGraph::NodeMap<int> def(g); //deficiency of the nodes |
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71 | def = subMap(f,InDegMap<ListGraph>(g)); |
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72 | |
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73 | IterableBoolNodeMap<ListGraph> active(g,false); |
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74 | for(NodeIt n(g);n!=INVALID;++n) active[n]=(def[n]>0); |
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75 | |
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76 | ListGraph::EdgeMap<bool> rev(g,false); // rev[e]==true <=> e is be |
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77 | // reversed |
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78 | |
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79 | int nodeNum=countNodes(g); |
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80 | |
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81 | Node act; |
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82 | while((act=IterableBoolNodeMap<ListGraph>::TrueIt(active))!=INVALID) { |
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83 | std::cout << "Process node " << id[act] |
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84 | << " (def=" << def[act] |
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85 | << " lev=" << level[act] << "): "; |
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86 | OutEdgeIt e(g,act); |
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87 | while(e!=INVALID && level[g.target(e)]>=level[act]) ++e; |
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88 | if(e!=INVALID) { |
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89 | std::cout << " REVERT EDGE " << g.id(e) |
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90 | << " (" << id[g.source(e)] << "---" |
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91 | << id[g.target(e)] << ")" |
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92 | << std::endl; |
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93 | if(--def[act]==0) active[act]=false; |
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94 | if(++def[g.target(e)]>0) active[g.target(e)]=true; |
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95 | g.reverseEdge(e); |
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96 | rev[e]=!rev[e]; |
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97 | } |
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98 | else { |
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99 | std::cout << " LIFT" << std::endl; |
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100 | if(++level[act]>nodeNum) { |
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101 | std::cout << "NINCS ILYEN\n"; |
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102 | return 1; |
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103 | } |
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104 | } |
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105 | } |
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106 | |
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107 | //Show the graph |
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108 | |
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109 | graphToEps(g,"graph_orientation.eps").scaleToA4(). |
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110 | title("Sample .eps figure (fits to A4)"). |
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111 | copyright("(C) 2006 LEMON Project"). |
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112 | nodeScale(15). |
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113 | coords(coords). |
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114 | negateY(). |
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115 | edgeColors(composeMap(ColorSet(),rev)). |
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116 | edgeWidthScale(1). |
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117 | nodeTexts(f).nodeTextSize(20). |
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118 | drawArrows().arrowWidth(10).arrowLength(10). |
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119 | run(); |
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120 | |
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121 | |
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122 | } //end of main() |
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123 | |
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124 | |
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