tikz-arrowstikz-pgf
I want to use a variant of |<->| in my draw command, but I want the tips to be the stealth arrow head. Unfortunately, |stealth-stealth| isn't understood in the draw options command.
How can I have stealth arrow heads?
\documentclass[tikz]{standalone}
\begin{document}
\begin{tikzpicture}
\draw[|stealth-stealth|] (0, 0) -- (1, 0);
\draw[| stealth-stealth |] (0, 0) -- (1, 0);
\end{tikzpicture}
\end{document}
\draw (20,12) -- ++(2,0) -- ++(0,2) -- ++(-3,0) -- ++(45:3);
Use ++ before each new incremental coordinate to make it relative to the last one and put the pencil there.
Here's a complete example:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\tikz\draw (20,12) -- ++(2,0) -- ++(0,2) -- ++(-3,0) -- ++(30:3) {[rounded corners=10pt]-- ++(5,0) -- ++(0,-6)} -- ++(-7,0) -- cycle;
\end{document}
Of course, combining this with the -| or |- path operators can simplify the code even further; the following two pieces of code produce the same result:
\tikz\draw (20,12) -- ++(2,0) -- ++(0,2) -- ++(3,0) -- ++(0,1) -- ++(1,0) -- ++(0,-3) -- ++(2,0);\par\bigskip
and
\tikz\draw (20,12) -| ++(2,2) -| ++(3,1) -- ++(1,0) |- ++(2,-3);
I don't think that defining commands in this case adds anything; in fact, I think it reduces the functionality of the existing syntax (which is already simple). The example demonstrates that you can use, for example, polar coordinates and modify (up to TikZ limitations) the path attributes midways; even if the current question doesn't require this, it's a good thing to have the possibility to do those kind of modification if they are required.
For straight lines only, maybe a bit like this?
\documentclass[tikz,border=5]{standalone}
\usetikzlibrary{decorations}
\pgfdeclaredecoration{arrows}{draw}{
\state{draw}[width=\pgfdecoratedinputsegmentlength]{%
\path [every arrow subpath/.try] \pgfextra{%
\pgfpathmoveto{\pgfpointdecoratedinputsegmentfirst}%
\pgfpathlineto{\pgfpointdecoratedinputsegmentlast}%
};
}}
\tikzset{every arrow subpath/.style={->, draw, thick}}
\begin{document}
\begin{tikzpicture}
\path [decoration=arrows, decorate](0,0) -- ++(1,0) -- ++(0,1) -- ++(45:1);
\end{tikzpicture}
\end{document}
Best Answer
With
tikzversion 3, you can do this: