点图形语言 - 如何制作双向边界？ [英] Dot graph language - how to make bidirectional edges?

问题描述

  strict digraph graphName {
 A-> B 
 B-> A 
} 
  

这会创建
alt text http://grab.by/grabs/a7a5a41268955d2a62b6aa2b8b131e03.png

相反，我想要在A和B之间显示一条边，但带有双箭头。我知道如何让双箭头作为一个全局选项：

 严格digraph graphName {
 edge [dir = both] 
 A-> B 
 B-> A 
} 
  

但是这看起来非常丑陋，并不是所有的边缘都应该是双头的。

替代文字http://grab.by/grabs/c370bc807079b0e6c0e5f63d5624b211.png

如果我对图进行更多处理并且自己检测双引用，并用单个边替换两个边，它看起来OK。但是我宁愿不必做这个额外的步骤

  strict digraph graphName {
 A-> B [ dir =both] 
} 
  

替代文字http://grab.by/grabs/424d58700292a274eea833ff8956c696.png

有什么更好的解决方案？ p>

解决方案

'concentrate = true'如何？：

  strict digraph graphName {
 concentrate = true 
 A-> B 
 B-> A 
} 
  

with concentrate = true http： //i38.tinypic.com/290ugk6.png

从 documentation ：

如果属实，请使用边缘集中器。这
将多边形合并成单边
，并导致部分并行边到
共享它们路径的一部分。后者的
功能尚未在
点以外获得。

Here is a very simplified example of my Dot graph:

strict digraph graphName {
A->B
B->A
}

This creates alt text http://grab.by/grabs/a7a5a41268955d2a62b6aa2b8b131e03.png

Instead I want a single edge shown between A and B but with a double arrow head. I know how to get the double arrowhead as a global option:

strict digraph graphName {
  edge [dir="both"]
A->B
B->A
}

But that looks very ugly, and not all of my edges should be dual headed.

alt text http://grab.by/grabs/c370bc807079b0e6c0e5f63d5624b211.png

If I do more processing of the graph and detect the double reference myself and replace the two edges with a single edge, it looks OK. But I'd rather not have to do this extra step

strict digraph graphName {
A->B [dir="both"]
}

alt text http://grab.by/grabs/424d58700292a274eea833ff8956c696.png

Any better solutions?

解决方案

How about 'concentrate=true'?:

strict digraph graphName {
concentrate=true
A->B
B->A
}

with concentrate=true http://i38.tinypic.com/290ugk6.png

From the documentation:

If true, use edge concentrators. This merges multiedges into a single edge and causes partially parallel edges to share part of their paths. The latter feature is not yet available outside of dot.

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