How to join two arrows with (TikZ)

Question

Possible Duplicate:
Merge arrows with TikZ

Is there a way to join two arrows? They should start from two different nodes, join and point to a third node. That would be great!

here I have a minimal example:

    \begin{tikzpicture}
        \tikzstyle{every node}=[draw,shape=ellipse];
        \node (node1) at (150:3) {x};
        \node (node2) at ( 30:3) {y};
        \node (node3) at ( 270:0) {z};

        \path[->] (node1) edge [out=-20, in=100,draw=gruen,line width=2pt] (30:1);
        \path[->] (node2) edge [out=200, in=80] (node3);
    \end{tikzpicture}

I can try until I have an approximate coordinate where the join happens, but that would be a problem if I want to change the position of the nodes later.

EDIT

I would like to have it that way:

X ------             -------> Z
Y ------/

Not the best sketch. But as percusse mentioned, the linked question should answer my question, too.

How do you want to proceed after join happens? Currently the line specs are different. You can use a temporary coordinate relative the target node for example at ($(node3)!1.5!(node3.70)$) and use it as a joining point. — percusse, Jun 13 '12 at 10:17

score 4 · Accepted Answer · answered Jun 13 '12 at 10:48

Thanks to percusse! I didn't find that question .. here is what my solution now looks like:

    \begin{tikzpicture}
        \tikzstyle{every node}=[draw,shape=ellipse];
        \node (node1) at (150:3) {x};
        \node (node2) at ( 30:3) {y};
        \node (node3) at ( 270:0) {z};

        \coordinate (zJoin) at ([yshift=0.5cm]node3.north);
        \draw[->] (zJoin) -- (node3); % the arrow

        \path (node1) edge [out=-20, in=100,draw=gruen,line width=2pt] (zJoin);
        \path (node2) edge [out=200, in=80] (zJoin);
    \end{tikzpicture}

No problem! Now that it is solved I've voted as a duplicate to the other linked question. — percusse, Jun 13 '12 at 11:50

score 2 · Answer 2 · edited Jun 13 '12 at 11:02

2

You can select a specific point in a node where both arrows will join.

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes}
\begin{document}
 \begin{tikzpicture}
        \tikzstyle{every node}=[draw,shape=ellipse];
        \node (node1) at (150:3) {x};
        \node (node2) at ( 30:3) {y};
        \node (node3) at ( 270:0) {z};

        \path[->] (node1) edge [out=-20, in=100,draw=green,line width=2pt] (node3.north);
        \path[->] (node2) edge [out=200, in=80] (node3.north);
    \end{tikzpicture}
\end{document}

enter image description here

edited Jun 13 '12 at 11:02

Bertram Nudelbach

513

answered Jun 13 '12 at 10:15

Ignasi

136,588

1

Yes, that's correct. I forgot to mention that I would like to join before they reach the target. – Bertram Nudelbach Jun 13 '12 at 10:53

How to join two arrows with (TikZ)

2 Answers2