GraphViz自定义后退箭头

Question

我有以下代码：

digraph "Classes utilisées par Git"
{
    subgraph mother
    {
        O [shape=record, label = "{GitObject| ref (sha1)}"];
    }
    subgraph herited
    {
        rankdir=LR;
        rank="same";
        "Tree" [shape=box];
        "Tag" [shape=box];
        "Blob" [shape=box];
        "Commit" [shape=box];
    }
    O -> "Tree" [arrowhead="onormal", dir=back];
    O -> "Blob" [arrowhead="onormal", dir=back];
    O -> "Commit" [arrowhead="onormal", dir=back];
    O -> "Tag" [arrowhead="onormal", dir=back];
    "Tree" -> "Tree" [arrowhead="vee", label=" 0..*\n0..*1"];
    "Tree" -> "Blob" [arrowhead="vee", label=" 0..*\n1"];
    "Commit" -> "Tree" [arrowhead="vee", label=" 1..*\n1"];
    "Tag" -> "Commit" [arrowhead="vee", label=" 0..*\n1"];
}

给了我：

我运作良好，但GitOject方向的箭头不是正常的，是他们的方法吗？

为了你的帮助， 先谢谢。

Answer 1

只需使用arrowtail="onormal"代替arrowhead="onormal"即可正确显示边缘。

arrowtail始终引用定义的边缘尾部，并未考虑dir=back。