使用graphviz画图
02 May 2010之前一直是使用 Dia 画流程图的，从功能性来说，跟 visio 应该差不多（好吧，我坦白我只看别人用过 visio ）。但是画一张图的大部分时间都被用在调整组件的位置上，如果图片比较复杂的话，花费的时间会非常夸张。之前尝试过一段时间 TeX，觉得 WYTIWYG 的方式更适合一些，所以尝试使用 Graphviz。
/* courtesy Ian Darwin and Geoff Collyer, Softquad Inc. */
digraph unix {
size="6,6";
node [color=lightblue2, style=filled];
"5th Edition" -> "6th Edition";
"5th Edition" -> "PWB 1.0";
"6th Edition" -> "LSX";
"6th Edition" -> "1 BSD";
"6th Edition" -> "Mini Unix";
"6th Edition" -> "Wollongong";
"6th Edition" -> "Interdata";
"Interdata" -> "Unix/TS 3.0";
"Interdata" -> "PWB 2.0";
"Interdata" -> "7th Edition";
"7th Edition" -> "8th Edition";
"7th Edition" -> "32V";
"7th Edition" -> "V7M";
"7th Edition" -> "Ultrix-11";
"7th Edition" -> "Xenix";
"7th Edition" -> "UniPlus+";
"V7M" -> "Ultrix-11";
"8th Edition" -> "9th Edition";
"1 BSD" -> "2 BSD";
"2 BSD" -> "2.8 BSD";
"2.8 BSD" -> "Ultrix-11";
"2.8 BSD" -> "2.9 BSD";
"32V" -> "3 BSD";
"3 BSD" -> "4 BSD";
"4 BSD" -> "4.1 BSD";
"4.1 BSD" -> "4.2 BSD";
"4.1 BSD" -> "2.8 BSD";
"4.1 BSD" -> "8th Edition";
"4.2 BSD" -> "4.3 BSD";
"4.2 BSD" -> "Ultrix-32";
"PWB 1.0" -> "PWB 1.2";
"PWB 1.0" -> "USG 1.0";
"PWB 1.2" -> "PWB 2.0";
"USG 1.0" -> "CB Unix 1";
"USG 1.0" -> "USG 2.0";
"CB Unix 1" -> "CB Unix 2";
"CB Unix 2" -> "CB Unix 3";
"CB Unix 3" -> "Unix/TS++";
"CB Unix 3" -> "PDP-11 Sys V";
"USG 2.0" -> "USG 3.0";
"USG 3.0" -> "Unix/TS 3.0";
"PWB 2.0" -> "Unix/TS 3.0";
"Unix/TS 1.0" -> "Unix/TS 3.0";
"Unix/TS 3.0" -> "TS 4.0";
"Unix/TS++" -> "TS 4.0";
"CB Unix 3" -> "TS 4.0";
"TS 4.0" -> "System V.0";
"System V.0" -> "System V.2";
"System V.2" -> "System V.3";
}
上面是一张Unix发展历程图的源码（从 graphviz 官方网站扣的），效果如下：
尝试了一下画一张差不多复杂度的流程图，大约15分钟左右。之前 Dia 至少半个小时以上。
PS. graphviz-dot-mode 实在是个很方便的东西，不过个人觉得，目前还欠缺自动补齐功能。