Take the 2-minute tour ×
TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It's 100% free, no registration required.

I have been using TikZ to draw game-trees for my game-theory lectures (mostly using the automata package) but I could not figure out how to draw an arc across the edges the leave a given node. When we want to denote that a player has a continuum of actions available at a node, we usually draw an arc across the edge leaving such node. For example see the arc crossing the edges that leave the first node in this picture:

enter image description here

Any suggestions on how I could try to implement this in TikZ? Thanks!

share|improve this question
Can you please add to your question a little, complete example of how you are drawing the trees? –  Gonzalo Medina May 3 '12 at 22:30
Thanks for editing my question and thanks a lot for the answer! –  Sergio Parreiras May 9 '12 at 1:08

1 Answer 1

Here you have a possible solution:

1.- place two coordinates over the edges (from TiKZ's manual section Edges From the parent node) and

2.- draw the arc between them. How? look at: Draw an arc between 2 nodes and label it in TikZ



\begin{tikzpicture}[every node/.style={fill,circle,inner sep=2pt}]
\node (root) {}     
   child {node (a1) {} edge from parent coordinate[pos=.45] (a11)}
    child {node (a2) {}}
    child {node (a3) {} edge from parent coordinate[pos=.45] (a31)}
%\node at (a11) {};
%\node at (a31) {};
\draw[bend right] (a11) to (a31);

enter image description here

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.