document graphviz feature

2014-05-18 08:19:32 +08:00 · 2014-05-18 08:19:32 +08:00 · 48f6255fbc
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 ```


+Rendering routes with graphviz
+-------------------------------
+
+The `test_gvc_render_file` API let you render the whole route trie into a image.
+
+[Imgur](http://i.imgur.com/J2LdzeK.png)
+
+Or you can even export it with dot format:
+
+```dot
+digraph g {
+	graph [bb="0,0,205.1,471"];
+	node [label="\N"];
+	"{root}"	 [height=0.5,
+		pos="35.097,453",
+		width=0.97491];
+	"#1"	 [height=0.5,
+		pos="35.097,366",
+		width=0.75];
+        ....
+```
+
 Use case in PHP
 -----------------------