I'm not sure if the title is correct but I'll try to explain my problem correctly.
I always work on the pgfvectorian package and I try to add some useful macros. One of these macros is to place an vector ornament between two nodes.
The next code give you a vector object named \myobject the I define a macro \pgfobj to draw this object. In this example I added 3 options : scale , width and anchor.
width is to draw the object with a predefined width and anchor is used to place the object.
I also defined a style object to easily place the object between two points. I calculate the distance between the 2 points and then I place the object with sloped and pos.
My problem : I would like to extend the style object. I would like for example change the value of pos and the value of anchor but I can't find a solution to this.
I would like a syntax like \draw [black] (A) to [object,pos=.2,anchor=north] (B); but apply these values at node [anchor=south,pos=.5,sloped,allow upside down,inner sep=0pt]
Sorry fot the long code but I think it's necessary to understand the question :
\documentclass[landscape]{scrartcl}
\usepackage{fullpage,tikz}
\usetikzlibrary{shapes.geometric,calc}
%8<------8<------8<------8<------8<------8<------8<------8<------8<------
\def\myobject{%
\pgfpathmoveto{\pgfqpoint{0bp}{0bp}}
\pgfpathcurveto{\pgfqpoint{50bp}{0bp}}
{\pgfqpoint{150bp}{0bp}}
{\pgfqpoint{200bp}{16bp}}
\pgfpathcurveto{\pgfqpoint{250bp}{0bp}}
{\pgfqpoint{350bp}{0bp}}
{\pgfqpoint{400bp}{0bp}}
\pgfpathlineto{\pgfqpoint{400bp}{1bp}}
\pgfpathcurveto{\pgfqpoint{350bp}{0bp}}
{\pgfqpoint{250bp}{0bp}}
{\pgfqpoint{200bp}{22bp}}
\pgfpathcurveto{\pgfqpoint{150bp}{0bp}}
{\pgfqpoint{50bp}{0bp}}
{\pgfqpoint{0bp}{1bp}}
\pgfpathlineto{\pgfqpoint{0bp}{0bp}}
\pgfusepath{fill,stroke}}
%8<------8<------8<------8<------8<------8<------8<------8<------8<------
\makeatletter
\pgfkeys{
/obj/.cd,
scale/.code = {\def\pgfogjscale{#1}},
width/.code = {\def\pgfogjwidth{#1}},
anchor/.code = {\def\pgfobjanchor{#1}}
}
%8<------8<------8<------8<------8<------8<------8<------8<------8<------
\def\pgfobj{\pgfutil@ifnextchar[{\pgf@obj}{\pgf@obj[]}}
\def\pgf@obj[#1]{%
\pgfkeys{%
/obj/.cd,
scale = 1,
width = {},
anchor = south
}%
\pgfqkeys{/obj}{#1}%
\begin{tikzpicture}[baseline=(current bounding box.\pgfobjanchor)]
\ifx\pgfogjwidth\empty \else
\pgfmathsetmacro{\pgfogjscale}{\pgfogjwidth /400 bp}%
\fi
\pgftransformscale{\pgfogjscale}%
\myobject
\end{tikzpicture}%
}%
%8<------8<------8<------8<------8<------8<------8<------8<------8<------
\tikzset{%
object/.style={to path={%
\pgfextra{%
\tikz@scan@one@point\pgfutil@firstofone(\tikztostart)\relax
\pgf@xa=\pgf@x
\pgf@ya=\pgf@y
\tikz@scan@one@point\pgfutil@firstofone(\tikztotarget)\relax
\pgf@xb=\pgf@x
\pgf@yb=\pgf@y
\advance\pgf@xa by-\pgf@xb
\advance\pgf@ya by-\pgf@yb
\pgfmathveclen{\pgf@xa}{\pgf@ya}
\global\let\objlen\pgfmathresult
\path (\tikztostart) -- node [anchor=south,pos=.5,
sloped,allow upside down,inner sep=0pt]%
{\pgfobj[width=\objlen]} (\tikztotarget) ;
}%end pgfextra
}% end to path
}% end style
}
%8<------8<------8<------8<------8<------8<------8<------8<------8<------
\makeatother
\begin{document}
vector ornament with \texttt{scale=.5}: \pgfobj[scale=.5]
vector ornament between 2 nodes :
\begin{tikzpicture}
\node (A) at (0,0) {}; \node (B) at (7,5) {};
\draw [help lines] (0,0) grid (7,5);
\draw [fill=black] (A) circle (2pt)
(B) circle (2pt);
\draw [black] (A) to [object] (B);
\end{tikzpicture}
Ornaments with a pentagon :
\begin{tikzpicture}
\node[regular polygon, regular polygon sides=5,
minimum size=8cm,inner sep=0pt](h) {};
\foreach \i [count=\next from 2] in {1,...,5}
{%
\draw (h.corner \i) to [object] (h.corner \next);
\pgfmathtruncatemacro{\next}{mod(\next,5)} }
\end{tikzpicture}
\end{document}
Remark 1) I can use another code to draw the object like :
\pgfmathsetmacro{\objangle}{atan2(\pgf@xa,\pgf@ya)}
\node[anchor=south,rotate=\objangle,inner sep=0pt] at
($(\tikztostart)!.5!(\tikztotarget)$){\pgfobj[width=\objlen]} ;
2) In fact I work with several objects also the syntax is something like :
\draw [black] (A) to [object = integer] (B); % integer = numero of the object
3) Perhaps I may have taken a wrong way also if you have a better idea, I'm listening !
