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使用graphviz twopi控制布局

本文介绍了使用graphviz twopi控制布局的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我试图绘制一个图表，显示使用twopi的搜索前缀。我有一个简单的输入文件，并得到这个输出：






以下是输入文件： 

  digraph search {
 
 // ordering = out; 
 // color = blue; 
 // rank = same; 
 // overlap = scale; 
 rankdir = LR; 
 root = root; 
 ranksep = 1.25; 
 overlap = true; 
 
root; 
 
 a [color = none，fontsize = 12]; 
 b [color = none，fontsize = 12]; 
 c [color = none，fontsize = 12]; 
 d [color = none，fontsize = 12]; 
 e [color = none，fontsize = 12]; 
 f [color = none，fontsize = 12]; 
 #g [color = none，fontsize = 12]; 
 h [color = none，fontsize = 12]; 
我[color = none，fontsize = 12]; 
 j [color = none，fontsize = 12]; 
 k [color = none，fontsize = 12]; 
 l [color = none，fontsize = 12]; 
 m [color = none，fontsize = 12]; 
 n [color = none，fontsize = 12]; 
 o [color = none，fontsize = 12]; 
 p [color = none，fontsize = 12]; 
 q [color = none，fontsize = 12]; 
 r [color = none，fontsize = 12]; 
 s [color = none，fontsize = 12]; 
 t [color = none，fontsize = 12]; 
 u [color = none，fontsize = 12]; 
 v [color = none，fontsize = 12]; 
 w [color = none，fontsize = 12]; 
 x [color = none，fontsize = 12]; 
 y [color = none，fontsize = 12]; 
 
 #ga [color = none，fontsize = 12]; 
 gb [color = none，fontsize = 12]; 
 gc [color = none，fontsize = 12]; 
 gd [color = none，fontsize = 12]; 
 ge [color = none，fontsize = 12]; 
 gf [color = none，fontsize = 12]; 
 gg [color = none，fontsize = 12]; 
 gh [color = none，fontsize = 12]; 
 gi [color = none，fontsize = 12]; 
 gj [color = none，fontsize = 12]; 
 gk [color = none，fontsize = 12]; 
 gl [color = none，fontsize = 12]; 
 gm [color = none，fontsize = 12]; 
 gn [color = none，fontsize = 12]; 
 go [color = none，fontsize = 12]; 
 gp [color = none，fontsize = 12]; 
 gq [color = none，fontsize = 12]; 
 gr [color = none，fontsize = 12]; 
 gs [color = none，fontsize = 12]; 
 gt [color = none，fontsize = 12]; 
 gu [color = none，fontsize = 12]; 
 gv [color = none，fontsize = 12]; 
 gw [color = none，fontsize = 12]; 
 gx [color = none，fontsize = 12]; 
 gy [color = none，fontsize = 12]; 
 
 gaa [color = none，fontsize = 12]; 
 gab [color = none，fontsize = 12]; 
 gac [color = none，fontsize = 12]; 
 gad [color = none，fontsize = 12]; 
 gae [color = none，fontsize = 12]; 
 gaf [color = none，fontsize = 12]; 
 gag [color = none，fontsize = 12]; 
 gah [color = none，fontsize = 12]; 
 gai [color = none，fontsize = 12]; 
 gaj [color = none，fontsize = 12]; 
 gak [color = none，fontsize = 12]; 
 gal [color = none，fontsize = 12]; 
 gam [color = none，fontsize = 12]; 
 gan [color = none，fontsize = 12]; 
 gao [color = none，fontsize = 12]; 
 gap [color = none，fontsize = 12]; 
 gaq [color = none，fontsize = 12]; 
 #gaz [color = none，fontsize = 12]; 
 gas [color = none，fontsize = 12]; 
 gat [color = none，fontsize = 12]; 
 gau [color = none，fontsize = 12]; 
 gav [color = none，fontsize = 12]; 
 gaw [color = none，fontsize = 12]; 
 gax [color = none，fontsize = 12]; 
 gay [color = none，fontsize = 12]; 
 
 gaza [color = none，fontsize = 12]; 
 gazb [color = none，fontsize = 12]; 
 gazc [color = none，fontsize = 12]; 
 gazd [color = none，fontsize = 12]; 
凝视[color = none，fontsize = 12]; 
 #gazf [color = none，fontsize = 12]; 
 gazg [color = none，fontsize = 12]; 
 gazh [color = none，fontsize = 12]; 
 gazi [color = none，fontsize = 12]; 
 gazj [color = none，fontsize = 12]; 
 gazk [color = none，fontsize = 12]; 
 gazl [color = none，fontsize = 12]; 
 gazm [color = none，fontsize = 12]; 
 gazn [color = none，fontsize = 12]; 
 gazo [color = none，fontsize = 12]; 
 gazp [color = none，fontsize = 12]; 
 gazq [color = none，fontsize = 12]; 
 gazr [color = none，fontsize = 12]; 
 gazs [color = none，fontsize = 12]; 
 gazt [color = none，fontsize = 12]; 
 gazu [color = none，fontsize = 12]; 
 gazv [color = none，fontsize = 12]; 
 gazw [color = none，fontsize = 12]; 
 gazx [color = none，fontsize = 12]; 
 gazy [color = none，fontsize = 12]; 
 
 root  - > a [minlen = 2]; 
 root  - > b [minlen = 2]; 
 root  - > c [minlen = 2]; 
 root  - > d [minlen = 2]; 
 root  - > e [minlen = 2]; 
 root  - > f [minlen = 2]; 
 root  - > g [minlen = 2]; 
 root  - > h [minlen = 2]; 
 root  - >我[minlen = 2]; 
 root  - > j [minlen = 2]; 
 root  - > k [minlen = 2]; 
 root  - > l [minlen = 2]; 
 root  - > m [minlen = 2]; 
 root  - > n [minlen = 2]; 
 root  - > o [minlen = 2]; 
 root  - > p [minlen = 2]; 
 root  - > q [minlen = 2]; 
 root  - > r [minlen = 2]; 
 root  - > s [minlen = 20]; 
 root  - > t [minlen = 2]; 
 root  - > u [minlen = 2]; 
 root  - > v [minlen = 2]; 
 root  - > w [minlen = 2]; 
 root  - > x [minlen = 2]; 
 root  - > y [minlen = 2]; 
 root  - > 0 [minlen = 2]; 
 root  - > 1 [minlen = 2]; 
 root  - > 2 [minlen = 2]; 
 root  - > 3 [minlen = 2]; 
 root  - > 4 [minlen = 2]; 
 root  - > 5 [minlen = 2]; 
 root  - > 6 [minlen = 2]; 
 root  - > 7 [minlen = 2]; 
 root  - > 8 [minlen = 2]; 
 root  - > 9 [minlen = 2]; 
 root  - >  [minlen = 2]; 
 
 g  - > ga; 
 g  - > gb; 
 g  - > GC  ; 
 g  - > gd; 
 g  - > ge; 
 g  - > gf; 
 g  - > gg; 
 g  - > gh; 
 g  - > gi; 
 g  - > gj; 
 g  - > gk; 
 g  - > gl; 
 g  - > gm; 
 g  - > gn; 
 g  - >走  ; 
 g  - > gp; 
 g  - > gq; 
 g  - > gr; 
 g  - > gs; 
 g  - > gt; 
 g  - >顾
 g  - > gv; 
 g  - > gw; 
 g  - > gx; 
 g  - > gy; 
 
 ga  - > gaa; 
 ga  - > gab; 
 ga  - > gac; 
 ga  - >嘎嘎
 ga  - > gae; 
 ga  - >加夫人
 ga  - >堵嘴
 ga  - > gah; 
 ga  - >盖
 ga  - > gaj; 
 ga  - > gak; 
 ga  - >加仑
 ga  - >游戏
 ga  - >甘
 ga  - >高
 ga  - >差距
 ga  - > gaq; 
 ga  - >煤气
 ga  - >加油站  ; 
 ga  - > gat; 
 ga  - > gau; 
 ga  - >加夫
 ga  - > gaw; 
 ga  - >嘎嘎
 ga  - >同性恋
 
 gaz  - >加沙
 gaz  - > gazb; 
 gaz  - > gazc; 
 gaz  - > gazd; 
 gaz  - >凝视  ; 
 gaz  - > gazf; 
 gaz  - > gazg; 
 gaz  - > gazh; 
 gaz  - >加齐
 gaz  - > gazj; 
 gaz  - > gazk 
 gaz  - > gazl; 
 gaz  - > gazm; 
 gaz  - >加纳
 gaz  - >加索
 gaz  - > gazp; 
 gaz  - >加斯加
 gaz  - > gazr; 
 gaz  - >煤气
 gaz  - > gazt; 
 gaz  - >加苏
 gaz  - > gazv; 
 gaz  - >嘎嘎
 gaz  - > gazx; 
 gaz  - >瞪大眼睛
 
 gazo  - > 蓝色星期二; 
Blue Tuesday[fontsize = 10]; 
 
 //布局引擎：circo dot fdp neato nop nop1 nop2 osage patchwork sfdp twopi 
 $ b}

这个输出产生于： 

  twopi -os1.png -Tpng s1 .dot

我在这里发帖，因为打印输出非常可怕。所有挂在gaz上的节点都是重叠的;我已经试过指定 nodesep ，它被简单地忽略。我希望看到从根部到单个字母的线条更加分离，但是我再次无法控制它。



这似乎是twopi中的一个错误。该文件表明，它应该明确地遵循这些指令，但它似乎并没有。



我的问题：


  1. 有没有办法让twopi行为？

  2. 如果没有，有更好的布局引擎可以使用吗？

    3. ol>

    谢谢。

    解决方案

    我发现twopi是最难的适用于所有graphviz布局引擎。



    我对原始点文件做了一些小改动。呈现的图形如下所示。



    以下是差异：



    图表属性：


    • size =7.75,10.25; //确保
      整个图形符合一个8.5 x
      11页面;

      • >

    • ranksep = 3.0; nodesep = 2.0;


    • 已删除：root = root;和
      overlap = true




    边缘属性：




    • 我为所有边缘设置了边缘权重等于0.1
      ：[weight = 0.1]





    所有边缘的边缘权重减少90％具有增加边缘长度的净效果（或者更确切地说，放宽对边缘长度的限制）;显然，这有助于节点扇出。这样做也增加了g和root之间的距离，给root的子节点更多空间。我还调整了一些纯粹的审美属性 - - 对布局没有任何影响，但对我而言，当您需要在单个页面上绘制中等密度的图时，似乎很重要：

    图表属性：

    fontname =Helvetica;
    fontsize = 13



    节点属性：

    [color =lightsteelblue2，shape =diamond，[color =diamond，shape =diamond，style =filled]

    style =filled]



    ga[color =darkorange，shape =diamond，style =filled] b

    gaz[color =bisque4，shape =diamond，style =filled]

    ：



    [arrowsize = 0.4，penwidth = 1.2]


    I am trying to draw a graph showing search prefixes using twopi. I have a simple input file and am getting this output:

    alt text http://www.freeimagehosting.net/uploads/th.ac6cd51528.png(full image)

    Here is the input file:

    digraph search {

// ordering=out;
// color=blue;
// rank=same;
// overlap=scale;
 rankdir=LR;
 root=root;
 ranksep=1.25;
 overlap=true;

"root";

a [color=none,fontsize=12];
b [color=none,fontsize=12];
c [color=none,fontsize=12];
d [color=none,fontsize=12];
e [color=none,fontsize=12];
f [color=none,fontsize=12];
#g [color=none,fontsize=12];
h [color=none,fontsize=12];
i [color=none,fontsize=12];
j [color=none,fontsize=12];
k [color=none,fontsize=12];
l [color=none,fontsize=12];
m [color=none,fontsize=12];
n [color=none,fontsize=12];
o [color=none,fontsize=12];
p [color=none,fontsize=12];
q [color=none,fontsize=12];
r [color=none,fontsize=12];
s [color=none,fontsize=12];
t [color=none,fontsize=12];
u [color=none,fontsize=12];
v [color=none,fontsize=12];
w [color=none,fontsize=12];
x [color=none,fontsize=12];
y [color=none,fontsize=12];

#ga [color=none,fontsize=12];
gb [color=none,fontsize=12];
gc [color=none,fontsize=12];
gd [color=none,fontsize=12];
ge [color=none,fontsize=12];
gf [color=none,fontsize=12];
gg [color=none,fontsize=12];
gh [color=none,fontsize=12];
gi [color=none,fontsize=12];
gj [color=none,fontsize=12];
gk [color=none,fontsize=12];
gl [color=none,fontsize=12];
gm [color=none,fontsize=12];
gn [color=none,fontsize=12];
go [color=none,fontsize=12];
gp [color=none,fontsize=12];
gq [color=none,fontsize=12];
gr [color=none,fontsize=12];
gs [color=none,fontsize=12];
gt [color=none,fontsize=12];
gu [color=none,fontsize=12];
gv [color=none,fontsize=12];
gw [color=none,fontsize=12];
gx [color=none,fontsize=12];
gy [color=none,fontsize=12];

gaa [color=none,fontsize=12];
gab [color=none,fontsize=12];
gac [color=none,fontsize=12];
gad [color=none,fontsize=12];
gae [color=none,fontsize=12];
gaf [color=none,fontsize=12];
gag [color=none,fontsize=12];
gah [color=none,fontsize=12];
gai [color=none,fontsize=12];
gaj [color=none,fontsize=12];
gak [color=none,fontsize=12];
gal [color=none,fontsize=12];
gam [color=none,fontsize=12];
gan [color=none,fontsize=12];
gao [color=none,fontsize=12];
gap [color=none,fontsize=12];
gaq [color=none,fontsize=12];
#gaz [color=none,fontsize=12];
gas [color=none,fontsize=12];
gat [color=none,fontsize=12];
gau [color=none,fontsize=12];
gav [color=none,fontsize=12];
gaw [color=none,fontsize=12];
gax [color=none,fontsize=12];
gay [color=none,fontsize=12];

gaza [color=none,fontsize=12];
gazb [color=none,fontsize=12];
gazc [color=none,fontsize=12];
gazd [color=none,fontsize=12];
gaze [color=none,fontsize=12];
#gazf [color=none,fontsize=12];
gazg [color=none,fontsize=12];
gazh [color=none,fontsize=12];
gazi [color=none,fontsize=12];
gazj [color=none,fontsize=12];
gazk [color=none,fontsize=12];
gazl [color=none,fontsize=12];
gazm [color=none,fontsize=12];
gazn [color=none,fontsize=12];
gazo [color=none,fontsize=12];
gazp [color=none,fontsize=12];
gazq [color=none,fontsize=12];
gazr [color=none,fontsize=12];
gazs [color=none,fontsize=12];
gazt [color=none,fontsize=12];
gazu [color=none,fontsize=12];
gazv [color=none,fontsize=12];
gazw [color=none,fontsize=12];
gazx [color=none,fontsize=12];
gazy [color=none,fontsize=12];

root -> a  [minlen=2];
root -> b  [minlen=2];
root -> c  [minlen=2];
root -> d  [minlen=2];
root -> e  [minlen=2];
root -> f  [minlen=2];
root -> g  [minlen=2];
root -> h  [minlen=2];
root -> i  [minlen=2];
root -> j  [minlen=2];
root -> k  [minlen=2];
root -> l  [minlen=2];
root -> m  [minlen=2];
root -> n  [minlen=2];
root -> o  [minlen=2];
root -> p  [minlen=2];
root -> q  [minlen=2];
root -> r  [minlen=2];
root -> s  [minlen=20];
root -> t  [minlen=2];
root -> u  [minlen=2];
root -> v  [minlen=2];
root -> w  [minlen=2];
root -> x  [minlen=2];
root -> y  [minlen=2];
root -> 0  [minlen=2];
root -> 1  [minlen=2];
root -> 2  [minlen=2];
root -> 3  [minlen=2];
root -> 4  [minlen=2];
root -> 5  [minlen=2];
root -> 6  [minlen=2];
root -> 7  [minlen=2];
root -> 8  [minlen=2];
root -> 9  [minlen=2];
root -> "."  [minlen=2];

g -> ga  ;
g -> gb  ;
g -> gc  ;
g -> gd  ;
g -> ge  ;
g -> gf  ;
g -> gg  ;
g -> gh  ;
g -> gi  ;
g -> gj  ;
g -> gk  ;
g -> gl  ;
g -> gm  ;
g -> gn  ;
g -> go  ;
g -> gp  ;
g -> gq  ;
g -> gr  ;
g -> gs  ;
g -> gt  ;
g -> gu  ;
g -> gv  ;
g -> gw  ;
g -> gx  ;
g -> gy  ;

ga -> gaa  ;
ga -> gab  ;
ga -> gac  ;
ga -> gad  ;
ga -> gae  ;
ga -> gaf  ;
ga -> gag  ;
ga -> gah  ;
ga -> gai  ;
ga -> gaj  ;
ga -> gak  ;
ga -> gal  ;
ga -> gam  ;
ga -> gan  ;
ga -> gao  ;
ga -> gap  ;
ga -> gaq  ;
ga -> gaz  ;
ga -> gas  ;
ga -> gat  ;
ga -> gau  ;
ga -> gav  ;
ga -> gaw  ;
ga -> gax  ;
ga -> gay  ;

gaz -> gaza  ;
gaz -> gazb  ;
gaz -> gazc  ;
gaz -> gazd  ;
gaz -> gaze  ;
gaz -> gazf  ;
gaz -> gazg  ;
gaz -> gazh  ;
gaz -> gazi  ;
gaz -> gazj  ;
gaz -> gazk  ;
gaz -> gazl  ;
gaz -> gazm  ;
gaz -> gazn  ;
gaz -> gazo  ;
gaz -> gazp  ;
gaz -> gazq  ;
gaz -> gazr  ;
gaz -> gazs  ;
gaz -> gazt  ;
gaz -> gazu  ;
gaz -> gazv  ;
gaz -> gazw  ;
gaz -> gazx  ;
gaz -> gazy  ;

gazo -> "Blue Tuesday" ;
"Blue Tuesday" [ fontsize=10];

// Layout engines: circo dot fdp neato nop nop1 nop2 osage patchwork sfdp twopi

}

    This output is generated with:

    twopi -os1.png -Tpng s1.dot

    I'm posting here because the printout is pretty dreadful. All of the nodes hung of "gaz" are overlapping; I've tried specifying nodesep and it is simply ignored. I would like to see the lines from root to the single letters further apart, but again, I can't control that.

    This seems to be a bug in twopi. The documentation says it should clearly follow these directives, but it doesn't seem to.

    My questions:

    1. Is there any way to make twopi behave?
    2. Failing that, is there a better layout engine to use?

    Thanks.

    解决方案

    I have found twopi to be the most difficult to work with of all the graphviz layout engines.

    I made a few small changes to your original dot file. The rendered graph is shown below.

    Here are the diffs:

    graph attributes:

    • size="7.75,10.25"; // ensures thatentire graph fits on a single 8.5 x11 page;

    • orientation="landscape";

    • ranksep=3.0; nodesep=2.0;

    • deleted: "root=root"; and"overlap=true"

    edge attributes:

    • i set the edge weight equal to 0.1for all edges: [weight=0.1]

    Reducing the edge weight by 90% for all edges has the net effect of increasing the edge length (or more precisely relaxing the constraint on edge length); obviously, this helps the nodes to "fan out". Doing this also increases the distance between "g" and "root", giving the child nodes of "root" more room.

    I also tweaked a few purely aesthetic attributes--not having any effect on the layout, but that to me, seem to matter when you need to draw even a moderately dense graph on a single page:

    graph attributes:

    fontname="Helvetica";fontsize=13

    node attributes:

    "root" [color="goldenrod4", shape="diamond", style="filled"]

    "g" [color="lightsteelblue2", shape="diamond", style="filled"]

    "ga" [color="darkorange", shape="diamond", style="filled"]

    "gaz" [color="bisque4", shape="diamond", style="filled"]

    edge attributes:

    [arrowsize=0.4, penwidth=1.2]

    这篇关于使用graphviz twopi控制布局的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

09-05 04:23
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