SVG issues with OrthoLayout

[malte.a...@googlemail.com]

Hi,

I'm currently using SVG as a visualization solution for a tool that deals with architecture diagrams. I'm using the most up-to-date snapshot (2018-03-28) and I'm having issues with the SVG files resulting from my diagrams.

This is my code, mostly derived from the example on your homepage:

int main(int argc, char* argv[])

{

std::ifstream is("diagram.gml", std::ifstream::binary);

Graph G;

GraphAttributes GA(G,

GraphAttributes::nodeGraphics |

GraphAttributes::edgeGraphics |

GraphAttributes::nodeLabel |

GraphAttributes::edgeStyle |

GraphAttributes::nodeStyle |

GraphAttributes::nodeTemplate);

//GraphIO::readGML(GA, G, std::cin);

GraphIO::readGML(GA, G, is);

PlanarizationLayout pl;

SubgraphPlanarizer crossMin;

auto* ps = new PlanarSubgraphFast<int>;

ps->runs(100);

VariableEmbeddingInserter *ves = new VariableEmbeddingInserter;

ves->removeReinsert(RemoveReinsertType::All);

crossMin.setSubgraph(ps);

crossMin.setInserter(ves);

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::drawSVG(GA, std::cout);

std::flush(std::cout);

std::ofstream outputFile("output.svg");

GraphIO::drawSVG(GA, outputFile);

return 0;

}

Everything works as intended, but the resulting SVG of my diagram (see attached files) has serious issues with lines (not connected, sections missing...). Is this issue already known and does anyone now a possible solution?

Regards,

Malte

[Tilo]

Dear Malte,

thank you for reporting this error.

You also need to enable edgeGraphics, edgeType, and nodeType for your GraphAttributges-object.

Running your program in debug mode should raise the respective errors (see build guide).

Still, I confirm the faulty behavior you observed.

As a workaround you may add

GA.directed() = false;

right after constructing GA, assuming that you don't want to indicate the direction of your edges.

The error will (probably) be fixed in the next snapshot.

Cheers

Tilo

[malte.a...@googlemail.com]

Dear Tilo,

thanks for your hints! Not rendering the direction of the edges should be okay for now, I'm looking forward for a possible fix.

Have a nice weekend!

Regards,

Malte