Graphviz从上到下从左到右 [英] Graphviz top to bottom AND left to right

问题描述

您好，我想要一个带点语的uml序列图，现在我遇到以下问题，我想让布局如下，其中a，b，c和d的直线在顶部，但直线直接到底部。我该如何实现？

Hi there I want to have a uml sequence diagram with dot language, now I have the following problem I want to have the layout as follows with a, b, c and d in a straight line at top but with the lines going straight to the bottom. How can I achieve that?

a   b   c   d
|   |   |   | 
|   |   |   |

也许我可以实现a，b，c和d及其所属边为群集

perhaps can I achieve that the a, b, c and d with its belonging edges are clusters where I set a different rankdir for the clusters?

编辑刚刚找到了一种解决方案，只需在a，b，c和d之间添加不可见边即可解决方案？

EDIT Just found a solution by adding invisible edges between a, b, c and d but any other solutions?

推荐答案

您所描述的似乎是 dot 所做的工作

What you describe seems to be what dot does by default.

例如，此图：

digraph SO {
  a -> a1 -> a2
  b -> b1 -> b2
  c -> c1 -> c2
  d -> d1 -> d2
} 

像这样出来：

如果您有更复杂的图形，可以使用以下命令强制节点处于相同的高度 rank =相同。例如：

If you have a more complex graph you can force nodes to be at the same height using rank=same. For example:

digraph SO {
  { rank = same
    a b c d
  }

  a -> a1 -> a2 
  b -> b1 -> b2 -> b3 -> b4
  c -> c1 
  d -> d1 -> d2 -> d3
  d2 -> a2
}

像这样出来：

但是，如果您要 a ， b ， c 和 d 具体的顺序，我认为您将必须像建议的那样使用不可见的边缘。 点指南甚至建议这样做：

However, if you want a, b, c and d to be in a specific order I think you're going to have to use invisible edges like you suggested. The dot guide even recommends this:

当
节点被约束到相同的
等级。在这些节点之间具有非零权重
的边对准同一方向
上的等级
（旋转的
中的从左到右或从上到下） ） 越远越好。
通过在需要的地方放置不可见的
边缘（ style = invis ），可以利用这一事实来调整
节点的顺序。

Edge weights also play a role when nodes are constrained to the same rank. Edges with non-zero weight between these nodes are aimed across the rank in the samedirection (left-to-right, or top-to-bottom in a rotated drawing) as far as possible. This fact may be exploited to adjust node ordering by placing invisible edges (style="invis") where needed.

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