X-Git-Url: https://git.njae.me.uk/?a=blobdiff_plain;f=lib%2Fgraph.njae%2Fvertex.rb;fp=lib%2Fgraph.njae%2Fvertex.rb;h=def0b66d79a81ff2b0348655d1459cab1720aefe;hb=07acbb1582f12f3dcde0351277cc42a36e61e87b;hp=aca3fa9aea23baccb74156c6fe8ce29fd3d17477;hpb=e2bfe13863188f286cdfda010aac750591a7e027;p=graph.njae.git

diff --git a/lib/graph.njae/vertex.rb b/lib/graph.njae/vertex.rb
index aca3fa9..def0b66 100644
--- a/lib/graph.njae/vertex.rb
+++ b/lib/graph.njae/vertex.rb
@@ -1,5 +1,3 @@
-require 'ostruct'
-
 # A simple graph library
 
 module GraphNjae
@@ -43,5 +41,21 @@ module GraphNjae
       '<V: ' + self.name.to_s + '>'
     end
     
+    def to_dot(opts = {})
+      if block_given?
+        yield self
+      else
+        dot = self.object_id.to_s
+        if opts.size > 0
+          dot << ' {'
+          dot << opts.keys.map { |k|
+            (k.to_s + ' = "' + self.instance_eval(opts[k].to_s).to_s) + '"'
+                        }.join(', ')
+          dot << '}'
+        end
+        dot << ';'
+      end
+    end
+    
   end
 end