[Tex/LaTex] Custom Tikz arrowhead with bar before triangle 45

tikz-arrowstikz-pgf

How do I make a custom arrowhead in Tikz having a perpendicular bar before a triangle 45? I would also like to adapt this solution to a bar before a square, open square, etc.

For example, imagine arrow coming from (0,0) to (10,0), then the arrowhead would be a filled triangle roughly (9,1) — (10, 0) — (9, -1). I want to add a bar, which is a filled rectangle roughly (8.5,1) — (8.6, 1) — (8.6, -1) — (8.5, -1).

I guess I can use pgfdeclarearrow to declar a bar somehow and then pgfarrowsdeclarecombine* to combine it with existing arrows?

Best Answer

With the arrows.meta library in pgf 3.0 (released December 2013), combining arrow heads is pretty simple and can be done in advance or in-line:

\documentclass[border=0.125cm]{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\tikzset{%
  tipA/.tip={Bar[sep]Triangle[open,angle=45:4pt]},
  tipB/.tip={Bar[sep]Square[open]}
}
\begin{document}

\begin{tikzpicture}
\draw [-tipA] (0,0)  -- +(1,0);
\draw [-tipB] (0,.5) -- +(1,0);
% in-line
\draw [-{Bar[sep]Triangle[angle=45:4pt]}] (0,1)   -- +(1,0);
\draw [-{Bar[sep]Square[]}]   (0,1.5) -- +(1,0);
\end{tikzpicture} 

\end{document}

enter image description here

Just for Thomas:

\documentclass[border=0.125cm]{standalone}
\usepackage{tikz}
\usetikzlibrary{fadings}
\usetikzlibrary{arrows.meta}
\tikzset{%
  tipA/.tip={Bar[sep]Triangle[open,angle=45:4pt]},
  tipB/.tip={Bar[sep]Square[open]},
  legs/.tip={Straight Barb[reversed]},
  long legs/.tip={Straight Barb[reversed,angle=30:4pt]},
  hat/.tip={Bracket[reversed,sep=-1pt]Rectangle[]},
  arms/.tip={Bar[sep]},
  head/.tip={Circle[]},
  skirt/.tip={Triangle[reversed]},
  arms down/.tip={Straight Barb[angle=35:4pt]},
  long hair/.tip={Arc Barb[length=9pt,width=6pt,sep=-9pt]Arc Barb[length=9pt,width=5pt,sep=-9pt]Arc Barb[length=9pt,width=7pt]}
}

\begin{document}



\begin{tikzpicture}[x=0.5cm,y=0.5cm]
\draw [legs-tipA] (0,0)  -- +(0,1);
\draw [legs-tipB] (1,0) -- +(0,1);
% in-line
\draw [legs-{Bar[sep]Triangle[angle=45:4pt]}] 
  (2,0)   -- +(0,1);
\draw [legs-{Bar[sep]Square[]}]   
  (3,0) -- +(0,1);
\draw [legs-{arms[]head[sep=-1pt]hat[]}]   
  (4,0) -- +(0,1);
\draw [{long legs[]skirt[sep=-2pt]}-{arms down[]head[sep=-8.5pt]long hair[]}]   
  (5,0) -- +(0,1);
\end{tikzpicture} 

\end{document}

enter image description here

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