cluster-plan.cpp

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#include <ogdf/basic/GraphSets.h>
#include <ogdf/basic/Graph.h>
#include <ogdf/basic/List.h>
#include <ogdf/basic/graph_generators/clustering.h>
#include <ogdf/cluster/ClusterGraph.h>
#include <ogdf/cluster/ClusterGraphAttributes.h>
#include <ogdf/cluster/ClusterPlanarizationLayout.h>
#include <ogdf/cluster/sync_plan/ClusterPlanarity.h>
#include <ogdf/fileformats/GraphIO.h>
#include <stdexcept>
#include <string>
#include <utility>
#include <vector>
 
using namespace ogdf;
 
int main(void) {
    // create a random cluster graph
    Graph G;
    ClusterGraph CG(G);
    ClusterGraphAttributes CGA(CG, ClusterGraphAttributes::all);
    randomClusterPlanarGraph(G, CG, 10, 20, 50);
 
    // set up the sync plan test
    SyncPlanClusterPlanarityModule sp;
    std::vector<std::pair<adjEntry, adjEntry>> augmentation;
    sp.setStoreAugmentation(&augmentation);
 
    // run the test + embedder
    if (!sp.clusterPlanarEmbed(CG, G)) {
        throw std::runtime_error("Not c-planar!");
    }
 
    // add the computed augmentation edges
    EdgeSet added(G);
    insertAugmentationEdges(CG, G, augmentation, &added);
 
    // the augmentation edges make the instance c-connected c-plane, fixing the embedding for ClusterPlanarizationLayout
    ClusterPlanarizationLayout cpl;
    cpl.call(G, CGA, CG);
 
    // now hide the augmentation edges from the generated drawing
    Graph::HiddenEdgeSet hes(G);
    for (edge e : added) {
        hes.hide(e);
    }
 
    GraphIO::write(CGA, "clusters.svg");
    return 0;
}