Since the »arrows« library of the
pgf/tikZ package does not define such arrow tips, you have to do that by yourself. The idea is to borrow code from similar arrow types and modify them.
The code below defines the new arrow types "angle 20" and "triangle 20" along with their reversed counterparts.
- Code: Select all • Open in writeLaTeX
\documentclass{minimal}
\usepackage{tikz}
\usetikzlibrary{arrows}
\makeatletter
\pgfarrowsdeclare{angle 20}{angle 20}
{
\pgfutil@tempdima=0.3pt%
\advance\pgfutil@tempdima by.25\pgflinewidth%
\pgfutil@tempdimb=7.29\pgfutil@tempdima\advance\pgfutil@tempdimb by.5\pgflinewidth%
\pgfarrowsleftextend{+-\pgfutil@tempdimb}
\pgfutil@tempdimb=.5\pgfutil@tempdima\advance\pgfutil@tempdimb by1.6\pgflinewidth%
\pgfarrowsrightextend{+\pgfutil@tempdimb}
}
{
\pgfutil@tempdima=0.3pt%
\advance\pgfutil@tempdima by.25\pgflinewidth%
\pgfsetdash{}{+0pt}
\pgfsetroundcap
\pgfsetmiterjoin
\pgfpathmoveto{\pgfpointadd{\pgfqpoint{0.5\pgfutil@tempdima}{0pt}}{\pgfqpointpolar{167}{18\pgfutil@tempdima}}}
\pgfpathlineto{\pgfqpoint{0.5\pgfutil@tempdima}{0pt}}
\pgfpathlineto{\pgfpointadd{\pgfqpoint{0.5\pgfutil@tempdima}{0pt}}{\pgfqpointpolar{-167}{18\pgfutil@tempdima}}}
\pgfusepathqstroke
}
\pgfarrowsdeclarereversed{angle 20 reversed}{angle 20 reversed}{angle 20}{angle 20}
\pgfarrowsdeclare{triangle 20}{triangle 20}
{
\pgfutil@tempdima=0.5pt%
\advance\pgfutil@tempdima by.25\pgflinewidth%
\pgfutil@tempdimb=7.29\pgfutil@tempdima\advance\pgfutil@tempdimb by.5\pgflinewidth%
\pgfarrowsleftextend{+-\pgfutil@tempdimb}
\pgfutil@tempdimb=.5\pgfutil@tempdima\advance\pgfutil@tempdimb by1.6\pgflinewidth%
\pgfarrowsrightextend{+\pgfutil@tempdimb}
}
{
\pgfutil@tempdima=0.5pt%
\advance\pgfutil@tempdima by.25\pgflinewidth%
\pgfsetdash{}{+0pt}
\pgfsetmiterjoin
\pgfpathmoveto{\pgfpointadd{\pgfqpoint{0.5\pgfutil@tempdima}{0pt}}{\pgfqpointpolar{167}{12\pgfutil@tempdima}}}
\pgfpathlineto{\pgfqpoint{0.5\pgfutil@tempdima}{0\pgfutil@tempdima}}
\pgfpathlineto{\pgfpointadd{\pgfqpoint{0.5\pgfutil@tempdima}{0pt}}{\pgfqpointpolar{-167}{12\pgfutil@tempdima}}}
\pgfpathclose
\pgfusepathqfillstroke
}
\pgfarrowsdeclarereversed{triangle 20 reversed}{triangle 20 reversed}{triangle 20}{triangle 20}
\makeatother
\begin{document}
\begin{tikzpicture}
\draw[angle 20-angle 20] (0,0) -- (2,0);
\draw[triangle 20-triangle 20] (0,0.5) -- (2,0.5);
\end{tikzpicture}
\end{document}
This might need further adjustments. Whereas the "triangle 20" type looks good, I have the impression that the "angle 20" type is a bit distorted although I'm sure that I didn't modify parameters which could cause that. You may verify that with a printed document.
Thorsten
