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/**
*
* This file is part of Tulip (www.tulip-software.org)
*
* Authors: David Auber and the Tulip development Team
* from LaBRI, University of Bordeaux
*
* Tulip is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* Tulip is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
*/
#include <ctime>
#include <tulip/TulipPluginHeaders.h>
using namespace std;
using namespace tlp;
struct edgeS {
unsigned source,target;
};
namespace std {
template<>
struct less<edgeS> {
bool operator()(const edgeS &c,const edgeS &d) const {
return (c.source < d.source) ||
((c.source == d.source) && (c.target<d.target));
}
};
}
namespace {
const char * paramHelp[] = {
// nodes
HTML_HELP_OPEN() \
HTML_HELP_DEF( "type", "unsigned int" ) \
HTML_HELP_DEF( "default", "500" ) \
HTML_HELP_BODY() \
"Number of nodes in the final graph." \
HTML_HELP_CLOSE(),
// edges
HTML_HELP_OPEN() \
HTML_HELP_DEF( "type", "unsigned int" ) \
HTML_HELP_DEF( "default", "1000" ) \
HTML_HELP_BODY() \
"Number of edges in the final graph." \
HTML_HELP_CLOSE(),
};
}
/** \addtogroup import */
/// Random Graph - Import of a random graph
/** This plugin enables to create a random graph
*
* User can specify the number of nodes and the number of edges of the graph.
*/
class RandomGraph:public ImportModule {
public:
PLUGININFORMATION("Random General Graph","Auber","16/06/2002","Imports a new randomly generated graph.","1.0","Graph")
RandomGraph(tlp::PluginContext* context):ImportModule(context) {
addInParameter<unsigned int>("nodes",paramHelp[0],"500");
addInParameter<unsigned int>("edges",paramHelp[1],"1000");
}
~RandomGraph() {
}
bool importGraph() {
// initialize a random sequence according the given seed
tlp::initRandomSequence();
unsigned int nbNodes = 5;
unsigned int nbEdges = 9;
if (dataSet!=NULL) {
dataSet->get("nodes", nbNodes);
dataSet->get("edges", nbEdges);
}
if (nbNodes == 0) {
if (pluginProgress)
pluginProgress->setError(string("Error: the number of nodes cannot be null"));
return false;
}
unsigned int ite = nbNodes*nbEdges;
unsigned int nbIteration = ite;
set<edgeS> myGraph;
if (pluginProgress)
pluginProgress->showPreview(false);
while (ite>0) {
if (ite%nbNodes==1) if (pluginProgress->progress(nbIteration-ite,nbIteration)!=TLP_CONTINUE)
return pluginProgress->state()!=TLP_CANCEL;
edgeS tmp;
tmp.source=rand()%nbNodes;
tmp.target=rand()%nbNodes;
if (myGraph.find(tmp)!=myGraph.end())
myGraph.erase(tmp);
else if (myGraph.size()<nbEdges) myGraph.insert(tmp);
ite--;
}
vector<node> tmpVect(nbNodes);
graph->reserveNodes(nbNodes);
for (unsigned int i=0; i<nbNodes; ++i) {
tmpVect[i]=graph->addNode();
}
graph->reserveEdges(myGraph.size());
for (set<edgeS>::const_iterator it=myGraph.begin(); it!=myGraph.end(); ++it) {
graph->addEdge(tmpVect[it->source],tmpVect[it->target]);
}
return true;
}
};
PLUGIN(RandomGraph)
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