graphviz - graphviz中的重叠边

Question

我有两个重叠的边缘，不知道为什么：

digraph G {
    graph [rankdir=LR, overlap=false];
    subgraph cluster1 {
       d1;
       n1;
    }
    subgraph cluster2 {
       n2;
       d2;
    }
    n1 -> n2;
    n2 -> n1;
    d0 -> d1;
    d0 -> d2;
}

有没有办法分别显示两个n1 -> n2边缘n2 -> n1？删除集群不是一种选择，但会有所帮助......

Answer 1

使用portPos修饰符的解决方案：

digraph G {
    graph [rankdir=LR, overlap=false];
    subgraph cluster1 {
       d1;
       n1;
    }
    subgraph cluster2 {
       n2;
       d2;
    }
    n1:sw -> n2:nw;
    n2:ne -> n1:se;
    d0 -> d1;
    d0 -> d2;
}

另一种解决方案是使用 dir 和颜色修饰符：

digraph G {
    graph [rankdir=LR, overlap=false];
    subgraph cluster1 {
       d1;
       n1;
    }
    subgraph cluster2 {
       n2;
       d2;
    }
    n2 -> n1[dir=both color="red:blue"];
    d0 -> d1;
    d0 -> d2;
}

color="black:black"如果您想保持黑白配色方案，您甚至可以使用。

Answer 2

试错解决方案（不要问我为什么会这样......）：

digraph G {
    graph [rankdir=LR, overlap=false];
    subgraph cluster1 {
       d1;
       n1;
    }
    subgraph cluster2 {
       n2;
       d2;
    }
    n1 -> n2;
    n1 -> n2[constraint=false, dir=back];
    n2 -> n1[style=invis];
    d0 -> d1;
    d0 -> d2;
}