控制twopi（Graphviz）中的间距

Question

我是Graphviz的新手，想要在一个实体中心绘制一棵树（我使用twopi命令）。

• 如果我设置overlap=true，即使周围有很多空间，标签也会重叠。
• 如果我设置overlap=false，标签就会变得太小。

如何避免重叠而又不会出现标签过小的问题？

完整代码:

digraph g {
    graph [ fontname = "Helvetica",
        fontsize = 10,
        size = "500,500",
        splines=true,
        overlap=false,
        ratio=.5 ];
    node [  shape = plaintext,
        fontname = "Helvetica" ];

    root="owl:Thing";
    "owl:Thing" -> "Work";
    "Work" -> "WrittenWork";
    "Work" -> "Software";
    "Work" -> "Website";
    "Work" -> "Film";
    "owl:Thing" -> "Agent";
    "Agent" -> "Organisation";
    "Organisation" -> "Non-ProfitOrganisation";
    "Organisation" -> "GeopoliticalOrganisation";
    "Organisation" -> "SambaSchool";
    "Agent" -> "Person";
    "Person" -> "Athlete";
    "Person" -> "OfficeHolder";
    "Person" -> "Astronaut";
    "Person" -> "Philosopher";
    "Person" -> "Architect";
    "owl:Thing" -> "Drug";
    "owl:Thing" -> "Place";
    "Place" -> "SiteOfSpecialScientificInterest";
    "Place" -> "PopulatedPlace";
    "PopulatedPlace" -> "Country";
    "PopulatedPlace" -> "Continent";
    "PopulatedPlace" -> "Atoll";
    "Place" -> "ProtectedArea";
    "Place" -> "ArchitecturalStructure";
    "Place" -> "HistoricPlace";
    "Place" -> "NaturalPlace";
    "NaturalPlace" -> "Mountain";
    "NaturalPlace" -> "Volcano";
    "NaturalPlace" -> "MountainRange";
}

谢谢您，

Alessio

- Alessio Palmero Aprosio

Answer 1

针对这个特定图形，您可以使用 overlap=true 并逐渐增加 ranksep 直到没有标签重叠。 ranksep=1.3 似乎是一个不错的值。

- marapet