orthogonal.cpp

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#include <ogdf/basic/GraphAttributes.h>
#include <ogdf/basic/GraphList.h>
#include <ogdf/basic/Graph.h>
#include <ogdf/fileformats/GraphIO.h>
#include <ogdf/orthogonal/OrthoLayout.h>
#include <ogdf/planarity/EmbedderMinDepthMaxFaceLayers.h>
#include <ogdf/planarity/PlanarSubgraphFast.h>
#include <ogdf/planarity/PlanarizationLayout.h>
#include <ogdf/planarity/RemoveReinsertType.h>
#include <ogdf/planarity/SubgraphPlanarizer.h>
#include <ogdf/planarity/VariableEmbeddingInserter.h>
#include <iostream>
#include <string>
 
using namespace ogdf;
 
int main()
{
    Graph G;
    GraphAttributes GA(G,
      GraphAttributes::nodeGraphics | GraphAttributes::nodeType |
      GraphAttributes::edgeGraphics | GraphAttributes::edgeType);
 
    if (!GraphIO::read(GA, G, "ERDiagram.gml", GraphIO::readGML)) {
        std::cerr << "Could not read ERDiagram.gml" << std::endl;
        return 1;
    }
 
    for (node v : G.nodes)
    {
        GA.width(v) /= 2;
        GA.height(v) /= 2;
    }
 
    PlanarizationLayout pl;
 
    SubgraphPlanarizer *crossMin = new SubgraphPlanarizer;
    PlanarSubgraphFast<int> *ps = new PlanarSubgraphFast<int>;
    ps->runs(100);
    VariableEmbeddingInserter *ves = new VariableEmbeddingInserter;
    ves->removeReinsert(RemoveReinsertType::All);
 
    crossMin->setSubgraph(ps);
    crossMin->setInserter(ves);
    pl.setCrossMin(crossMin);
 
    EmbedderMinDepthMaxFaceLayers *emb = new EmbedderMinDepthMaxFaceLayers;
    pl.setEmbedder(emb);
 
    OrthoLayout *ol = new OrthoLayout;
    ol->separation(20.0);
    ol->cOverhang(0.4);
    pl.setPlanarLayouter(ol);
 
    pl.call(GA);
 
    GraphIO::write(GA, "output-ERDiagram.gml", GraphIO::writeGML);
    GraphIO::write(GA, "output-ERDiagram.svg", GraphIO::drawSVG);
 
    return 0;
}