[Tex/LaTex] Arrows at right angles on a tikzpicture matrix

matricestikz-pgf

I'm trying to do something pretty simple but haven't been able to find an answer so far. I have a flow chart and I want to draw straight arrows at right angles instead of 'bent' arrows, inside of a matrix environment.
This is the code I have, and I just need a way to replace the bent arrows to the left with straight arrows bent at right angles like the ones on the right:

\documentclass[a4paper,10pt]{article}
\usepackage[utf8x]{inputenc}
\usepackage{tikz}
\usetikzlibrary{matrix,shapes,arrows,positioning,chains}

\begin{document}

% Define block styles
\tikzstyle{desicion} = [diamond, draw, text width=3em, text badly centered, inner sep=0pt]%, node distance=3cm]
\tikzstyle{block} = [rectangle, draw, text width=10em, text centered, rounded corners]%, minimum height=4em]
\tikzstyle{cloud} = [draw, ellipse, minimum height=2em]

\begin{tikzpicture}[descr/.style={fill=white,inner sep=2.5pt}]
\matrix (m)[matrix of nodes, column  sep=2cm,row  sep=8mm, align=center, nodes={rectangle,draw, anchor=center} ]{
\node [block] {A. Campos [1;14]}; & \\
\node [block] {B. Bineado [1;4]}; & \\
\node [cloud] {call \texttt{analisis\_campo}}; & \\
\node [block] {C. Modelos [1;2]}; & \\
\node [block] {D. Extinción [1;31]}; &  \node [block] {E. Fracción de binarias [1;2]}; \\
\node [cloud] {call \texttt{analisis\_modelo}}; & \\
\node [cloud] {call \texttt{analisis\_final}}; & \node [desicion] {\scriptsize{Fin E}}; \\
\node [desicion] {\scriptsize{Fin D}}; & \\
\node [desicion] {\scriptsize{Fin C}}; & \\
\node [desicion] {\scriptsize{Fin B}}; & \\
\node [desicion] {\scriptsize{Fin A}}; & \\
\node [block] {Stop}; & \\
 };
\path [>=latex,->] (m-1-1) edge (m-2-1);
\path [>=latex,->] (m-2-1) edge (m-3-1);
\path [>=latex,->] (m-3-1) edge (m-4-1);
\path [>=latex,->] (m-4-1) edge (m-5-1);
\path [>=latex,->,dashed] (m-5-1) edge node[auto] {\scriptsize{MODEL}} (m-5-2);
\draw [>=latex,->] (m-5-2) |- (m-6-1);
\path [>=latex,->] (m-5-1) edge (m-6-1);
\path [>=latex,->] (m-6-1) edge (m-7-1);
\path [>=latex,->,dashed] (m-7-1) edge node[auto] {\scriptsize{MODEL}} (m-7-2);
\path [>=latex,->] (m-7-1) edge (m-8-1);
\path [>=latex,->,font=\scriptsize] (m-7-2) edge [bend right=60] node[descr] {No} (m-5-2);
\path [>=latex,->,font=\scriptsize] (m-8-1) edge [bend left=60] node[descr] {No} (m-5-1);
\path [>=latex,->,font=\scriptsize] (m-9-1) edge [bend left=60] node[descr] {No} (m-4-1);
\path [>=latex,->,font=\scriptsize] (m-10-1) edge [bend left=60] node[descr] {No} (m-2-1);
\path [>=latex,->,font=\scriptsize] (m-11-1) edge [bend left=60] node[descr] {No} (m-1-1);
\draw [>=latex,->,font=\scriptsize] (m-7-2) |- node[descr] {Sí} (m-8-1);
\path [>=latex,->,font=\scriptsize] (m-8-1) edge node[descr] {Sí} (m-9-1);
\path [>=latex,->,font=\scriptsize] (m-9-1) edge node[descr] {Sí} (m-10-1);
\path [>=latex,->,font=\scriptsize] (m-10-1) edge node[descr] {Sí} (m-11-1);
\path [>=latex,->,font=\scriptsize] (m-11-1) edge node[descr] {Sí} (m-12-1);
\end{tikzpicture}

\end{document}

Here's what I get whit this code:

enter image description here

Best Answer

Instead of using an edge, you can use a to operation (which has to be used with \draw, not \path). That will give you very fine control over how the nodes or coordinates are connected. You can define any arbitrary path using to path=<path definition>, in which (\tikztostart), (\tikztotarget) and (\tikztonodes) will hold the start and end of the path and the nodes you define with the to operation. If you define a style containing to path={(\tikztostart) -- ++(#1,0pt) \tikztonodes |- (\tikztotarget) }, you can pass an argument to the style and the to path will then draw a horizontal line for a specified distance, place the nodes on that line, and then draw an orthogonal line to the target.

I've also changed your code to use the \tikzset{<style name>/.style={<options>}} syntax instead of the obsolete \tikzstyle command.

\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{matrix,shapes,arrows,positioning,chains}

\begin{document}

% Define block styles
\tikzset{
    desicion/.style={
        diamond,
        draw,
        text width=3em,
        text badly centered,
        inner sep=0pt
    },
    block/.style={
        rectangle,
        draw,
        text width=10em,
        text centered,
        rounded corners
    },
    cloud/.style={
        draw,
        ellipse,
        minimum height=2em
    },
    descr/.style={
        fill=white,
        inner sep=2.5pt
    },
    connector/.style={
     -latex,
     font=\scriptsize
    },
    rectangle connector/.style={
        connector,
        to path={(\tikztostart) -- ++(#1,0pt) \tikztonodes |- (\tikztotarget) },
        pos=0.5
    },
    rectangle connector/.default=-2cm,
    straight connector/.style={
        connector,
        to path=--(\tikztotarget) \tikztonodes
    }
}

\begin{tikzpicture}
\matrix (m)[matrix of nodes, column  sep=2cm,row  sep=8mm, align=center, nodes={rectangle,draw, anchor=center} ]{
\node [block] {A. Campos [1;14]}; & \\
\node [block] {B. Bineado [1;4]}; & \\
\node [cloud] {call \texttt{analisis\_campo}}; & \\
\node [block] {C. Modelos [1;2]}; & \\
\node [block] {D. Extinción [1;31]}; &  \node [block] {E. Fracción de binarias [1;2]}; \\
\node [cloud] {call \texttt{analisis\_modelo}}; & \\
\node [cloud] {call \texttt{analisis\_final}}; & \node [desicion] {\scriptsize{Fin E}}; \\
\node [desicion] {\scriptsize{Fin D}}; & \\
\node [desicion] {\scriptsize{Fin C}}; & \\
\node [desicion] {\scriptsize{Fin B}}; & \\
\node [desicion] {\scriptsize{Fin A}}; & \\
\node [block] {Stop}; & \\
 };
\path [>=latex,->] (m-1-1) edge (m-2-1);
\path [>=latex,->] (m-2-1) edge (m-3-1);
\path [>=latex,->] (m-3-1) edge (m-4-1);
\path [>=latex,->] (m-4-1) edge (m-5-1);
\path [>=latex,->,dashed] (m-5-1) edge node[auto] {\scriptsize{MODEL}} (m-5-2);
\draw [>=latex,->] (m-5-2) |- (m-6-1);
\path [>=latex,->] (m-5-1) edge (m-6-1);
\path [>=latex,->] (m-6-1) edge (m-7-1);
\path [>=latex,->,dashed] (m-7-1) edge node[auto] {\scriptsize{MODEL}} (m-7-2);
\path [>=latex,->] (m-7-1) edge (m-8-1);
\draw [rectangle connector=2.5cm] (m-7-2) to node[descr] {No} (m-5-2);
\draw [rectangle connector=-3cm] (m-8-1) to  node[descr] {No} (m-5-1);
\draw [rectangle connector=-4cm,] (m-9-1) to node[descr] {No} (m-4-1);
\draw [rectangle connector=-5cm] (m-10-1) to  node[descr] {No} (m-2-1);
\draw [rectangle connector=-6cm] (m-11-1) to node[descr] {No} (m-1-1);
\draw [connector] (m-7-2) |- node[descr, pos=0.25] {Sí} (m-8-1);
\draw [straight connector] (m-8-1) to node[descr] {Sí} (m-9-1);
\draw [straight connector] (m-9-1) to node[descr] {Sí} (m-10-1);
\draw [straight connector] (m-10-1) to node [descr] {Sí} (m-11-1);
\draw [straight connector] (m-11-1) to node [descr] {Sí} (m-12-1) ;
\end{tikzpicture}

\end{document}

If you're using `tikz` v3.0

The syntax has changed a little for v3.0; the above code can be adapted to

% arara: pdflatex
% !arara: indent: {overwrite: yes}
\documentclass[a4paper,10pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{matrix,shapes,arrows,positioning,chains}

\begin{document}

% Define block styles
\tikzset{
    desicion/.style={
        diamond,
        draw,
        text width=3em,
        text badly centered,
        inner sep=0pt
    },
    block/.style={
        rectangle,
        draw,
        text width=10em,
        text centered,
        rounded corners
    },
    cloud/.style={
        draw,
        ellipse,
        minimum height=2em
    },
    descr/.style={
        fill=white,
        inner sep=2.5pt
    },
    connector/.style={
        -latex,
        font=\scriptsize
    },
    rectangle connector/.style={
        connector,
        to path={(\tikztostart) -- ++(#1,0pt) \tikztonodes |- (\tikztotarget) },
        pos=0.5
    },
    rectangle connector/.default=-2cm,
    straight connector/.style={
        connector,
        to path=--(\tikztotarget) \tikztonodes
    }
}

\begin{tikzpicture}
    \matrix (m)[matrix of nodes, column  sep=2cm,row  sep=8mm, align=center, nodes={rectangle,draw, anchor=center} ]{
        |[block]| {A. Campos [1;14]}               &                                             \\
        |[block]| {B. Bineado [1;4]}               &                                             \\
        |[cloud]| {call \texttt{analisis\_campo}}  &                                             \\
        |[block]| {C. Modelos [1;2]}               &                                             \\
        |[block]| {D. Extinción [1;31]}            & |[block]| {E. Fracción de binarias [1;2]}   \\
        |[cloud]| {call \texttt{analisis\_modelo}} &                                             \\
        |[cloud]| {call \texttt{analisis\_final}}  & |[desicion]| {\scriptsize{Fin E}}           \\
        |[desicion]| {\scriptsize{Fin D}}          &                                             \\
        |[desicion]| {\scriptsize{Fin C}}          &                                             \\
        |[desicion]| {\scriptsize{Fin B}}          &                                             \\
        |[desicion]| {\scriptsize{Fin A}}          &                                             \\
        |[block]| {Stop}                           &                                             \\
    };
    \path [>=latex,->] (m-1-1) edge (m-2-1);
    \path [>=latex,->] (m-2-1) edge (m-3-1);
    \path [>=latex,->] (m-3-1) edge (m-4-1);
    \path [>=latex,->] (m-4-1) edge (m-5-1);
    \path [>=latex,->,dashed] (m-5-1) edge node[auto] {\scriptsize{MODEL}} (m-5-2);
    \draw [>=latex,->] (m-5-2) |- (m-6-1);
    \path [>=latex,->] (m-5-1) edge (m-6-1);
    \path [>=latex,->] (m-6-1) edge (m-7-1);
    \path [>=latex,->,dashed] (m-7-1) edge node[auto] {\scriptsize{MODEL}} (m-7-2);
    \path [>=latex,->] (m-7-1) edge (m-8-1);
    \draw [rectangle connector=2.5cm] (m-7-2) to node[descr] {No} (m-5-2);
    \draw [rectangle connector=-3cm] (m-8-1) to  node[descr] {No} (m-5-1);
    \draw [rectangle connector=-4cm,] (m-9-1) to node[descr] {No} (m-4-1);
    \draw [rectangle connector=-5cm] (m-10-1) to  node[descr] {No} (m-2-1);
    \draw [rectangle connector=-6cm] (m-11-1) to node[descr] {No} (m-1-1);
    \draw [connector] (m-7-2) |- node[descr, pos=0.25] {Sí} (m-8-1);
    \draw [straight connector] (m-8-1) to node[descr] {Sí} (m-9-1);
    \draw [straight connector] (m-9-1) to node[descr] {Sí} (m-10-1);
    \draw [straight connector] (m-10-1) to node [descr] {Sí} (m-11-1);
    \draw [straight connector] (m-11-1) to node [descr] {Sí} (m-12-1) ;
\end{tikzpicture}

\end{document}

Related Solutions

[Tex/LaTex] Odd behaviour with arrows and multipart rectangles

Well, this one was a little strange but I think I know what is happening. Let me take a brief detour: Consider the following construction

\draw (0,0) -- (1,1) node (a) {A};.

What we expect from this piece of code is to put a node after the main path is created. Notice that the node has no idea of the nature of the path. Even if we use [pos=0.xx] it just looks for the last available path so there is no organic connection between the node placement and the path creation.

It turns out that edge is a to operation added in a similar manner without any relation whatsoever to the main path constructed before that. Another example (zoomed in)

\begin{tikzpicture}
\path[->,
     draw,
     line width=1mm % To make the arrowhead bigger
     ] (0,0);
\end{tikzpicture}

enter image description here

So, an arrowhead with a path of zero length. Same happens with the edge if we dissect one of your paths

\path [line] (leftrow1.two north) % This is the main path as the example above 
     edge[out=90, in=90] node {}(tripletoprow); % This is added afterwards without the 
                                                % line option in place creating the
                                                % illusion that the path is having 
                                                % a disconnected arrowhead

so shorten makes things even worse because it's shortening a zero length path taking the arrowhead even further. Once we get the problem right, then, it's easy to fix the problem via shifting the line option to the edge;

\documentclass[preview,tikz,border=3mm]{standalone}
\usetikzlibrary{shapes, arrows}
\tikzset{line/.style={draw, latex'-},
     seq/.style={rectangle split, rectangle split horizontal, rectangle split parts=#1, draw}
}
\begin{document}
\begin{tikzpicture}
\node [seq=3] (leftrow1) at (0cm, 4cm){};
\node [seq=3] (tripletoprow)  at (4cm, 4cm){};
\path (leftrow1.two north) edge[out=90, in=90,line] (tripletoprow);
\end{tikzpicture}
\end{document}

enter image description here

Also see the manual for the \tikztonodes operation to avoid the extra node{} before the target point.

[Tex/LaTex] How to define the default vertical distance between nodes

I don't really get the question so I hope this is what you wanted. If you include a full document (such that we copy paste and see the problem on our systems) things are much more easier.

Here, you can change the default setting within a scope but your block style had a node distance which was resetting every time it is issued. I've made it 2mm such that we can see the difference easier.

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,shapes.geometric,positioning}

\begin{document}
\begin{tikzpicture}[decision/.style={diamond, draw, text width=4.5em, text badly centered, node distance=3.5cm, inner sep=0pt},
                    block/.style   ={rectangle, draw, text width=6em, text centered, rounded corners, minimum height=4em, minimum height=2em},
                    cloud/.style   ={draw, ellipse, minimum height=2em},
                    line/.style    ={draw,-latex'},
                    node distance = 1cm, 
                    auto]
    \node [block] (1st) {1st};
    \node [block, right= of 1st]  (2nd1) {2nd1};
\begin{scope}[node distance=2mm and 10mm]%Here we change it for everything inside this scope
    \node [block, above= of 2nd1] (2nd2) {2nd2};
    \node [block, below= of 2nd1] (2nd3) {2nd3};
    \node [block, right= of 2nd1] (3rd1) {3rd1};
    \node [block, above= of 3rd1] (3rd2) {3rd2};
    \node [block, above= of 3rd2] (3rd3) {3rd3};
\end{scope}
    \node [block, below= of 3rd1] (3rd4) {3rd4};
    \node [block, below= of 3rd4] (3rd5) {3rd5};

    \path [line] (1st) -- (2nd1);
    \path [line] (2nd1) -- (2nd2);
    \path [line] (2nd1) -- (2nd3);
    \path [line] (2nd2) -- (3rd3);
    \path [line] (2nd1) -- (3rd1);
    \path [line] (1st) -- (2nd1);
\end{tikzpicture}
\end{document}

enter image description here

Best Answer

If you're using tikz v3.0

Related Solutions

[Tex/LaTex] Odd behaviour with arrows and multipart rectangles

[Tex/LaTex] How to define the default vertical distance between nodes

Related Question

If you're using `tikz` v3.0