从节点内开始边 [英] Starting an edge from within a node

问题描述

digraph foo {
a [label="<first> A | <rest> rest", shape=record];
b [label="<first> B | <rest> rest", shape=record];
a:rest -> b [label="foo", arrowtail=dot, dir=both];
}

我想从a:rest(最好在中心)内开始边缘的尾部(a到b)，这有可能吗?

I would like to start the tail of the edge (a to b) from within a:rest (ideally in the center), is this possible?

我正在尝试使用方框和指针之类的符号来绘制链表.

I am trying to draw linked lists using box and pointer like notation.

推荐答案

是的，这是可能的.使用的属性称为 tailclip :

Yes, this is possible. The attribute to use is called tailclip:

如果为true，则将边缘的尾部修剪到尾部的边界 节点;否则，边缘的末端将到达节点的中心， 或端口中心(如果适用).

If true, the tail of an edge is clipped to the boundary of the tail node; otherwise, the end of the edge goes to the center of the node, or the center of a port, if applicable.

只需将最后一行更改为

a:rest -> b [label="foo", arrowtail=dot, dir=both, tailclip=false];

正如@Kyborek在评论中提到的那样，当前版本的graphviz需要一个附加的指南针点:

As @Kyborek mentions in the comments, an additional compass point is needed for current versions of graphviz:

a:rest:c -> b [label="foo", arrowtail=dot, dir=both, tailclip=false];

另请参见此答案

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