texlive[59889] Master: tikz-swigs (10jul21)

commits+karl at tug.org commits+karl at tug.org
Sat Jul 10 23:03:16 CEST 2021


Revision: 59889
          http://tug.org/svn/texlive?view=revision&revision=59889
Author:   karl
Date:     2021-07-10 23:03:16 +0200 (Sat, 10 Jul 2021)
Log Message:
-----------
tikz-swigs (10jul21)

Modified Paths:
--------------
    trunk/Master/tlpkg/bin/tlpkg-ctan-check
    trunk/Master/tlpkg/tlpsrc/collection-pictures.tlpsrc

Added Paths:
-----------
    trunk/Master/texmf-dist/doc/latex/tikz-swigs/
    trunk/Master/texmf-dist/doc/latex/tikz-swigs/LICENSE
    trunk/Master/texmf-dist/doc/latex/tikz-swigs/README.md
    trunk/Master/texmf-dist/doc/latex/tikz-swigs/tikz-swigs.pdf
    trunk/Master/texmf-dist/doc/latex/tikz-swigs/tikz-swigs.tex
    trunk/Master/texmf-dist/tex/latex/tikz-swigs/
    trunk/Master/texmf-dist/tex/latex/tikz-swigs/tikzlibraryswigs.code.tex
    trunk/Master/tlpkg/tlpsrc/tikz-swigs.tlpsrc

Added: trunk/Master/texmf-dist/doc/latex/tikz-swigs/LICENSE
===================================================================
--- trunk/Master/texmf-dist/doc/latex/tikz-swigs/LICENSE	                        (rev 0)
+++ trunk/Master/texmf-dist/doc/latex/tikz-swigs/LICENSE	2021-07-10 21:03:16 UTC (rev 59889)
@@ -0,0 +1,1051 @@
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Added: trunk/Master/texmf-dist/doc/latex/tikz-swigs/README.md
===================================================================
--- trunk/Master/texmf-dist/doc/latex/tikz-swigs/README.md	                        (rev 0)
+++ trunk/Master/texmf-dist/doc/latex/tikz-swigs/README.md	2021-07-10 21:03:16 UTC (rev 59889)
@@ -0,0 +1,22 @@
+Ti*k*Z-SWIGs
+=============================================================
+
+The `tikz-swigs` package provides horizontally and vertically split elliptical (pairs of) nodes in Ti*k*Z.
+
+The two new multi-part shapes are `swig hsplit` and `swig vsplit`. These build on and extend the existing `ellipse split` shape provided in the `shapes.multipart` Ti*k*Z library in the following ways:
+
+- Space can be introduced physically separating the two sub-parts.
+- The cut that divides the ellipse can be horizontal `hsplit` or vertical `vsplit`.
+- The enclosing lines for each sub-part can be colored differently or can be double lines.
+- With `vsplit` the position of the dividing line relative to the original undivided ellipse is determined based on the relative size of the label text for the two pieces.
+- Anchors determined by angles are supported, for example `mynode.170`.
+
+The package name derives from the fact that split ellipses of this type are used to represent Single-World Intervention Graph (SWIG) models which are used in counterfactual causal inference.
+
+The tikz-swigs package is licensed under the The LaTeX Project Public License 1.3c and the
+GNU General Public License, version 2.
+
+Thanks to Robin J. Evans, F. Richard Guo and Ilya Shpitser for providing guidance, motivation and encouragement.
+
+ -- Thomas Richardson <thomasr at uw.edu>  9 July 2021
+


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+native
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===================================================================
--- trunk/Master/texmf-dist/doc/latex/tikz-swigs/tikz-swigs.pdf	2021-07-10 21:02:38 UTC (rev 59888)
+++ trunk/Master/texmf-dist/doc/latex/tikz-swigs/tikz-swigs.pdf	2021-07-10 21:03:16 UTC (rev 59889)

Property changes on: trunk/Master/texmf-dist/doc/latex/tikz-swigs/tikz-swigs.pdf
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Added: trunk/Master/texmf-dist/doc/latex/tikz-swigs/tikz-swigs.tex
===================================================================
--- trunk/Master/texmf-dist/doc/latex/tikz-swigs/tikz-swigs.tex	                        (rev 0)
+++ trunk/Master/texmf-dist/doc/latex/tikz-swigs/tikz-swigs.tex	2021-07-10 21:03:16 UTC (rev 59889)
@@ -0,0 +1,391 @@
+% Note the LaTeX code here uses a package that both shows the code and the output.
+% This package is: tkzexample
+% This ensures that the LaTeX corresponds to the figure.
+%
+% However, this means that there are extra lines in the source code below:
+%
+% \begin{tkzexample}
+%  [....]
+% \end{tkzexample} 
+%
+% (This should not cause confusion since the lines do not show up in the 
+% pdf version, but we note it here, in case a reader does not have access to the pdf)
+
+\documentclass[11pt]{article}
+\usepackage{natbib}
+\usepackage{amsmath,amssymb,booktabs,url}
+\usepackage{xcolor}
+\usepackage{pgf,tikz}
+\usetikzlibrary{arrows,shapes.arrows,shapes.geometric,
+shapes.multipart,decorations.pathmorphing,positioning,
+swigs}
+
+\usepackage{tkzexample} % to show code and pictures side by side
+%%% Note useful tkzexample options here:
+%% [very small] makes the code small
+%% [vbox]   stacks the figure before the code
+
+\begin{document}
+
+\colorlet{graphicbackground}{blue!10!white}%
+\colorlet{codebackground}{red!10}%  
+\colorlet{codeonlybackground}{red!10}% sets background for tkzltxexample
+
+\title{TikZ/PGF shape library for constructing Single-World Intervention Graphs (SWIGs)}
+\author{Thomas S. Richardson\\[2pt]
+Department of Statistics\\
+ University of Washington}
+\date{9 July 2021}
+\maketitle
+
+Single World Intervention Graphs (SWIGs) are a graphical formalism for unifying two approaches to building
+(statistical) causal models \citep{swigs}.
+
+Key to the representation is an operation of `node splitting', whereby a single node is divided into
+two pieces. It is important that the resulting halves can still be seen to have originated from a single node.
+
+\begin{center}
+
+\begin{tikzpicture}
+\tikzset{line width=1.5pt}
+\node[name=a1,shape=swig hsplit, swig hsplit={line color lower=red}]{
+        \nodepart{upper}{$A_1$}
+        \nodepart{lower}{$a_1$}   };
+\node[name=a2,shape=swig vsplit, right=of a1, swig vsplit={line color right=red}]{
+         \nodepart{left}{$A_2(a_1)$}
+         \nodepart{right}{$a_2$}  };
+\draw[->,line width=1pt](a1) to[out=350,in=180] (a2);
+\end{tikzpicture}
+
+\end{center}
+
+It has been hard to draw SWIGs using standard packages in TikZ/PGF.  Two separate {\tt semicircle} shapes can be used, but it is difficult to ensure that the two halves look as if they arise from a single circle, at least without introducing a lot of whitespace. TikZ does contain a shape, called {\tt split ellipse}, but this does not provide a way to add space between the two halves of the shape.
+(There does not appear to be a semi-ellipse shape.)
+
+We address this by introducing two multipart shapes: {\tt swig hsplit}  that creates an ellipse that has been split horizontally, and
+and {\tt swig vsplit} that is split vertically. The latter shape also adjusts the ratio of the two halves depending on the text that is contained.
+
+\eject
+\subsection*{Preliminaries}
+
+The examples included below use the following packages:
+%%%%%
+\begin{tkzltxexample}[]
+\documentclass[10pt]{article}
+\usepackage{amsmath,amssymb,xcolor}
+\usepackage{pgf,tikz}
+\usetikzlibrary{arrows,shapes.arrows,shapes.geometric,
+shapes.multipart,decorations.pathmorphing,positioning,
+swigs}
+\begin{document}
+...
+\end{tkzltxexample}
+
+%%%%%
+
+%\noindent The last library listed here uses the code in the file:\par
+%{\tt tikzlibraryshapes.swigs.code.tex} \par
+%\noindent (As this is not part of the TeX distribution,  this file should be placed in the working directory.)
+
+
+
+
+\subsection*{SWIG with horizontal split}
+
+Here is a very simple example:
+
+\begin{tkzexample}[very small,latex=4cm] 
+\begin{tikzpicture}
+\node[name=a1,shape=swig hsplit]{
+        \nodepart{upper}{$A_1$}
+        \nodepart{lower}{$a_1$}   };
+\node[name=a2,shape=swig hsplit,right=of a1]{
+         \nodepart{upper}{$A_2(a_1)$}
+         \nodepart{lower}{$a_2$}  };
+\draw[->](a1) to[out=350,in=170] (a2);
+\end{tikzpicture}
+\end{tkzexample} 
+
+\bigskip
+
+\noindent The parameter {\tt gap} can be adjusted to change the size of the gap:
+
+
+
+\begin{tkzexample}[latex=4cm, very small] 
+\begin{tikzpicture}
+\node[name=a1,shape=swig hsplit,
+swig hsplit={gap=5pt}]{
+        \nodepart{upper}{$A_1$}
+        \nodepart{lower}{$a_1$}  };
+\node[name=a2,shape=swig hsplit, right=of a1]{
+        \nodepart{upper}{$A_2(a_1)$}
+        \nodepart{lower}{$a_2$}  };
+\draw[->](a1) to[out=350,in=170] (a2);
+\end{tikzpicture}
+\end{tkzexample} 
+
+\medskip
+\eject
+
+\noindent This can also be done globally for all split nodes;
+here we also make the line color red for lower halves.
+
+\begin{tkzexample}[latex=4cm, very small]
+\begin{tikzpicture}
+\tikzset{swig hsplit={gap=5pt,line color lower=red}}
+\node[name=a1,shape=swig hsplit]{
+        \nodepart{upper}{$A_1$}
+        \nodepart{lower}{$a_1$} };
+\node[name=a2,shape=swig hsplit, right=of a1]{
+        \nodepart{upper}{$A_2(a_1)$}
+        \nodepart{lower}{$a_2$} };
+\draw[->](a1) to[out=350,in=170] (a2);
+\end{tikzpicture}
+\end{tkzexample}
+
+\medskip
+
+\noindent For black and white publications color may not be sufficient to distinguish
+upper and lower halves. For this purpose a double line can be used.
+{\tt inner line width lower} specifies the width of the inner gap.
+
+\begin{tkzexample}[latex=4cm, very small]
+\begin{tikzpicture}
+\tikzset{line width=1.5pt, 
+    swig hsplit={gap=4pt,
+                 inner line width lower=0.5pt}}]
+\node[name=a1,shape=swig hsplit]{
+        \nodepart{upper}{$A_1$}
+        \nodepart{lower}{$a_1$} };
+\node[name=a2,shape=swig hsplit, right=of a1]{
+        \nodepart{upper}{$A_2(a_1)$}
+        \nodepart{lower}{$a_2$} };
+\draw[->,line width=1.5pt,>=stealth](a1) 
+    to[out=350,in=170] (a2);
+\end{tikzpicture}
+\end{tkzexample}
+
+\eject
+
+\noindent The example below shows the full set of anchors and other options.
+
+\begin{center}
+
+\begin{tkzexample}[vbox, very small] 
+\Huge
+\begin{tikzpicture}
+\pgfsetinnerstrokecolor{blue!10!white} % so inner line col=background
+\tikzset{shape example/.style={fill=yellow!5,
+            inner sep=0.3cm,outer sep=0cm}}
+  \node[name=s, shape example, shape=swig hsplit,
+       swig hsplit={
+             line color upper=red!30, 
+             fill color upper=yellow!30,
+             line color lower=green!30,
+             fill color lower=yellow!30,  
+             gap=40pt,
+             line width upper= 10pt, 
+             inner line width upper = 0pt, 
+             line width lower=15pt,  
+             inner line width lower = 4pt}]
+            {\nodepart[red!30]{upper}{$A_4(a_1,a_2)$}
+             \nodepart[green!30]{lower}{$a_4$}};
+  \draw[->,line width=5pt, draw=blue!15,>=stealth] 
+                              (s.upper center) to (s.lower center);
+  \foreach \anchor/\placement in
+    {center/right, upper center/left, 
+    upper/below, lower center/left, lower/left,
+    60/above right,  200/below left, 
+     mid/above, mid east/above right, mid west/above left,
+     upper base/below right, base east/right, base west/left, 
+     upper east/right, upper west/left,
+     north/above, south/below, west/left, east/right,
+     lower west/left, lower east/right,
+     north east/above right, south east/below right, 
+     south west/below left, north west/above left, 
+     lower base/below right, lower mid/above}
+     \draw[shift=(s.\anchor)] plot[mark=x] coordinates{(0,0)}
+       node[\placement] {\scriptsize\texttt{(s.\anchor)}};   
+\end{tikzpicture}
+\end{tkzexample}
+\end{center}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\eject
+
+\subsection*{SWIG with vertical split}
+
+Here we describe the instructions for creating ellipses with vertical splits. These are often more efficient in terms of space.
+As before, first a very simple example:
+
+\begin{tkzexample}[very small,latex=5.5cm] 
+\begin{tikzpicture}
+\node[name=a1,shape=swig vsplit]{
+        \nodepart{left}{$A_1$}
+        \nodepart{right}{$a_1$}  };
+\node[name=a2, right=5mm of a1,
+             shape=swig vsplit] {
+             \nodepart{left}{$A_2(a_1)$}
+             \nodepart{right}{$a_2$} };
+\draw[->](a1) to (a2);
+\end{tikzpicture}
+\end{tkzexample} 
+
+\bigskip
+
+\noindent The parameter {\tt gap} can be adjusted to change the size of the gap:
+
+\begin{tkzexample}[very small,latex=5cm] 
+\begin{tikzpicture}
+\node[name=a1,shape=swig vsplit,
+  swig vsplit={gap=3pt}]{
+        \nodepart{left}{$A_1$}
+        \nodepart{right}{$a_1$}  };
+\node[name=a2, right=3mm of a1,
+             shape=swig vsplit] {
+             \nodepart{left}{$A_2(a_1)$}
+             \nodepart{right}{$a_2$} };
+\draw[->](a1) to (a2);
+\end{tikzpicture}
+\end{tkzexample} 
+
+\medskip
+
+\noindent This can also be done globally for all split nodes;
+here we also make the line color red for right halves.
+
+\begin{tkzexample}[latex=5cm, very small]
+\begin{tikzpicture}
+\tikzset{swig vsplit={gap=3pt,
+                  line color right=red}}
+\node[name=a1,shape=swig vsplit]{
+        \nodepart{left}{$A_1$}
+        \nodepart{right}{$a_1$} };
+\node[name=a2,shape=swig vsplit, 
+                  right=5mm of a1]{
+        \nodepart{left}{$A_2(a_1)$}
+        \nodepart{right}{$a_2$} };
+\draw[->](a1) to (a2);
+\end{tikzpicture}
+\end{tkzexample}
+
+\medskip
+
+\eject
+
+\noindent  As before, a version for black and white publications:
+
+\begin{tkzexample}[latex=5cm, very small]
+\begin{tikzpicture}
+\tikzset{line width=1.5pt, 
+         swig vsplit={gap=3pt,
+         inner line width right=0.5pt}}
+\node[name=a1,shape=swig vsplit]{
+        \nodepart{left}{$A_1$}
+        \nodepart{right}{$a_1$} };
+\node[name=a2,shape=swig vsplit, 
+                  right=3mm of a1]{
+        \nodepart{left}{$A_2(a_1)$}
+        \nodepart{right}{$a_2$} };
+\draw[->,line width=1.5pt,>=stealth]
+    (a1) to (a2);
+\end{tikzpicture}
+\end{tkzexample}
+
+\bigskip
+
+\noindent Here is an example with multiple stages:
+
+\begin{tkzexample}[vbox]
+\begin{tikzpicture}
+\tikzset{line width=1.5pt, outer sep=0pt,
+         ell/.style={draw,fill=white, inner sep=2pt,
+          line width=1.5pt},
+         swig vsplit={gap=5pt,
+         inner line width right=0.5pt}};
+\node[name=l1, ell, shape=ellipse]{$L_1$};
+\node[name=a1,right=5mm of l1, shape=swig vsplit]{
+        \nodepart{left}{$A_1$}
+        \nodepart{right}{$a_1$} };
+\node[name=l2, right=5mm of a1, ell, shape=ellipse]{$L_2(a_1)$};
+\node[name=a2,shape=swig vsplit, 
+                  right=5mm of l2]{
+        \nodepart{left}{$A_2(a_1)$}
+        \nodepart{right}{$a_2$} };
+\node[name=y, right=5mm of a2, ell, shape=ellipse]{$Y(a_1,a_2)$};
+\draw[->,line width=1.5pt,>=stealth]
+    (l1) edge (a1)
+     (l1) edge[out=330,in=210] (a2)
+    (a1) edge (l2)
+    (a1) edge[out=15,in=150] (a2)
+    (a1) edge[out=30,in=150] (y)
+    (l2) edge (a2)
+    (a2) edge (y);
+\end{tikzpicture}
+\end{tkzexample}
+
+
+
+
+
+\eject
+
+\noindent Expanded nodes showing additional options and anchors.
+
+\begin{tkzexample}[vbox, very small] 
+\Huge
+\begin{tikzpicture}
+\pgfsetinnerstrokecolor{blue!10!white} % so inner line col=background
+\tikzset{shape example/.style={draw,fill=yellow!30,
+             inner xsep=10pt,inner ysep=25pt,outer xsep=0cm,outer ysep=0cm},
+             swig vsplit={line color right=green!30, line color left=red!20, 
+                        gap=25pt, line width left= 10pt, line width right=15pt,  
+                      inner line width left = 0pt, inner line width right = 4pt}}
+  \node[name=s,shape=swig vsplit, shape example]
+            {\nodepart[red!20]{left}{$Y_1(a_1)$}
+              \nodepart[green!30]{right}{$y_1$}};
+ \foreach\anchor/\placement in 
+  {north/above, south/below, east/right, west/left, 
+ left base/below, right base/below, right/above, left/above,
+ left mid/above, mid east/right, mid west/left, base east/right,
+ base west/left, right mid/above,
+ 142/above, 320/below, center/below} 
+  \draw[shift=(s.\anchor)] plot[mark=x] coordinates{(0,0)}
+       node[\placement] {\scriptsize\texttt{(s.\anchor)}};
+\begin{scope}[yshift=-4cm]
+  \node[name=s,shape=swig vsplit, shape example]
+  {\nodepart[red!20]{left}{$Y_1(a_1)$}%
+ \nodepart[green!30]{right}{$y_1$}};
+ \foreach\anchor/\placement in 
+  {left center/below, right center/above, 
+  left north/above left, left south/below left,
+  right north/above right, right south/below right,
+north west/above left, south west/below left,
+ north east/above right, south east/below right} 
+ \draw[shift=(s.\anchor)] plot[mark=x] coordinates{(0,0)}
+       node[\placement] {\scriptsize\texttt{(s.\anchor)}};
+ \end{scope}
+ \end{tikzpicture}
+\end{tkzexample}
+
+
+\bibliographystyle{chicago}
+
+\begin{thebibliography}{}
+
+\bibitem[\protect\citeauthoryear{Richardson and Robins}{Richardson and
+  Robins}{2013}]{swigs}
+Richardson, T.S. and J.M.~Robins (2013).
+\newblock Single world intervention graphs (SWIGs): A unification of
+  counterfactual and graphical approaches to causality.
+\newblock Working Paper Number 128. Available at
+  \url{http://www.csss.washington.edu/Papers/wp128.pdf}.
+
+\end{thebibliography}
+
+%\bibliography{references}
+
+\end{document}
+


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+native
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--- trunk/Master/texmf-dist/tex/latex/tikz-swigs/tikzlibraryswigs.code.tex	                        (rev 0)
+++ trunk/Master/texmf-dist/tex/latex/tikz-swigs/tikzlibraryswigs.code.tex	2021-07-10 21:03:16 UTC (rev 59889)
@@ -0,0 +1,855 @@
+%%%%
+%%% swig  shapes
+%%% code for creating multi-part nodes corresponding to split ellipses with a gap
+%%%
+%%% swig hsplit  : ellipse split horizontally
+%%% swig vsplit  : ellipse split vertically
+%%%
+%%%
+%%% Modified from the file: 
+%%% pgflibraryshapes.multipart.code.tex (Copyright 2007 by Till Tantau and Mark Wibrow)
+%%% 
+%%% Copyright 2018 Thomas S. Richardson
+
+% This file may be distributed and/or modified
+%
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU Public License.
+%
+% See the file doc/generic/pgf/licenses/LICENSE for more details
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%% swig horizontal split
+%%% This is a multi-part node consisting of an ellipse split horizontally into 
+%%% upper and lower parts
+
+%%Very useful code allows groups of options to be set as: [...  shape=swig hsplit, swig hsplit={ .... }]
+\pgfkeys{/tikz/swig hsplit/.code={%
+              \pgfkeys{/tikz/swig hsplit/.cd,#1}%  
+               }}%
+%\pgfkeys{/tikz/swig hsplit/color/.initial = black}%
+\pgfkeys{/tikz/swig hsplit/line color upper/.initial = \pgfutil at empty}%
+\pgfkeys{/tikz/swig hsplit/line color lower/.initial = \pgfutil at empty}%
+\pgfkeys{/tikz/swig hsplit/fill color upper/.initial = \pgfutil at empty}%
+\pgfkeys{/tikz/swig hsplit/fill color lower/.initial = \pgfutil at empty}%
+%\pgfkeys{/tikz/swig hsplit/gap/.initial = \pgfutil at empty}%
+\pgfkeys{/tikz/swig hsplit/gap/.initial = 1.0em}
+\pgfkeys{/tikz/swig hsplit/line width upper/.initial = \the\pgflinewidth}%
+\pgfkeys{/tikz/swig hsplit/line width lower/.initial = \the\pgflinewidth}%
+\pgfkeys{/tikz/swig hsplit/inner line width upper/.initial = 0pt}%
+\pgfkeys{/tikz/swig hsplit/inner line width lower/.initial = 0pt}%
+%\pgfkeys{/pgf/ellipse splitb/dash/.initial = {{{0.5cm}{0.5cm}{0.1cm}{0.2cm}}{0cm}}
+
+\newbox\pgfnodepartlowerbox  %%Associated with anchor "upper"; see pgfmanual3.1, page 1035
+\newbox\pgfnodepartupperbox  %%Associated with anchor "lower"; see pgfmanual3.1, page 1035
+%%% Every node must have a center anchor
+%%% See pgf manual 3.1; p.1036
+
+\pgfdeclareshape{swig hsplit}{%
+	\nodeparts{upper,lower}%
+	\savedanchor\upper{%
+	\pgf at x0pt\pgf at y0pt\relax%
+	}%
+%https://tex.stackexchange.com/questions/21555/using-patterns-inside-pgf-shapes
+	\savedmacro\uppercolor{%
+	       \edef\tikz at temp{\pgfkeysvalueof{/tikz/swig hsplit/line color upper}}%
+	          \ifx\tikz at temp\pgfutil at empty\relax% 
+	                  \ifx\tikz at strokecolor\pgfutil at empty%if not defined even with draw=
+	                  \def\uppercolor{.}%
+	                \else%
+	                    \def\uppercolor{\tikz at strokecolor}% if defined with draw=
+	                \fi%
+	              \else%
+	               \def\uppercolor{\expandafter\pgfkeysvalueof{/tikz/swig hsplit/line color upper}}%if defined
+	              \fi} %%%Important: adding { } around the last def statement would break this
+	  \savedmacro\lowercolor{%
+	       \edef\tikz at temp{\pgfkeysvalueof{/tikz/swig hsplit/line color lower}}%
+	          \ifx\tikz at temp\pgfutil at empty\relax% 
+	                  \ifx\tikz at strokecolor\pgfutil at empty%if not defined even with draw=
+	                  \def\lowercolor{.}%
+	                \else%
+	                    \def\lowercolor{\tikz at strokecolor}% if defined with draw=
+	                \fi%
+	              \else%
+	               \def\lowercolor{\expandafter\pgfkeysvalueof{/tikz/swig hsplit/line color lower}}%if defined
+	              \fi} %%%Important: adding { } around the last def statement would break this
+%	
+\savedmacro\upperfillcolor{%
+	       \edef\tikz at temp{\pgfkeysvalueof{/tikz/swig hsplit/fill color upper}}%
+	          \ifx\tikz at temp\pgfutil at empty\relax% 
+	                  \ifx\tikz at fillcolor\pgfutil at empty%if not defined even with fill=
+	                  \def\upperfillcolor{white}%
+	                \else%
+	                    \def\upperfillcolor{\tikz at fillcolor}% if defined with fill=
+	                \fi%
+	              \else%
+	               \def\upperfillcolor{\expandafter\pgfkeysvalueof{/tikz/swig hsplit/fill color upper}}%if defined
+	              \fi}%
+\savedmacro\lowerfillcolor{%
+	       \edef\tikz at temp{\pgfkeysvalueof{/tikz/swig hsplit/fill color lower}}%
+	          \ifx\tikz at temp\pgfutil at empty\relax% 
+	                  \ifx\tikz at fillcolor\pgfutil at empty%if not defined even with fill=
+	                  \def\lowerfillcolor{white}%
+	                \else%
+	                    \def\lowerfillcolor{\tikz at fillcolor}% if defined with fill=
+	                \fi%
+	              \else%
+	               \def\lowerfillcolor{\expandafter\pgfkeysvalueof{/tikz/swig hsplit/fill color lower}}%if defined
+	              \fi}%
+	%
+        \savedanchor\linewidthupper{%
+       \pgfmathsetlength\pgf at y{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%
+       \pgfmathsetlength\pgf at x{0pt}%
+        }%
+         \savedanchor\linewidthlower{%
+       \pgfmathsetlength\pgf at y{\pgfkeysvalueof{/tikz/swig hsplit/line width lower}}%
+       \pgfmathsetlength\pgf at x{0pt}%
+        }%
+	\savedanchor\gap{% This is a coordinate, but \pgf at x is redundant
+	                   \pgfmathsetlength\pgf at y{\pgfkeysvalueof{/tikz/swig hsplit/gap}}%
+%%%%%%%% 
+	\pgfmathsetlength\pgf at x{0pt}%
+	}
+	\savedanchor\radii{%
+		\pgfmathsetlength\pgf at x{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\pgfmathsetlength\pgf at y{\pgfkeysvalueof{/pgf/inner ysep}}%
+		\pgf at y2.0\pgf at y%
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%Added to allow for different widths
+		\pgfmathsetlength\pgf at yb{\pgfkeysvalueof{/tikz/swig hsplit/line width lower}}%% of lines upper and lower
+		\ifdim\pgf at yb>\pgf at ya%
+			\pgf at ya\pgf at yb%
+		\fi%
+		\advance\pgf at y.5\pgf at ya% 
+		\pgf at xa.5\wd\pgfnodepartupperbox%
+		\pgf at xb.5\wd\pgfnodepartlowerbox%
+		\advance\pgf at xa\pgf at x%
+		\advance\pgf at xb\pgf at x%
+		\pgf at ya\ht\pgfnodepartupperbox%
+		\advance\pgf at ya\dp\pgfnodepartupperbox%
+		\pgf at yb\ht\pgfnodepartlowerbox%
+		\advance\pgf at yb\dp\pgfnodepartlowerbox%
+		\advance\pgf at ya\pgf at y%
+		\advance\pgf at yb\pgf at y%
+		\ifdim\pgf at xa>\pgf at xb%
+			\pgf at x1.414213\pgf at xa%
+		\else%
+			\pgf at x1.414213\pgf at xb%
+		\fi%
+		\ifdim\pgf at ya>\pgf at yb%
+			\pgf at y1.414213\pgf at ya%
+		\else%
+			\pgf at y1.414213\pgf at yb%
+		\fi%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/minimum width}}%
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/pgf/minimum height}}%
+		\ifdim\pgf at x<.5\pgf at xa%
+			\pgf at x.5\pgf at xa%
+		\fi%
+		\ifdim\pgf at y<.5\pgf at ya%
+			\pgf at y.5\pgf at ya%
+		\fi%
+		\pgfmathaddtolength\pgf at x{\pgfkeysvalueof{/pgf/outer xsep}}%
+		\pgfmathaddtolength\pgf at y{\pgfkeysvalueof{/pgf/outer ysep}}%
+	}
+	\savedanchor\lower{%
+		\pgf at x-.5\wd\pgfnodepartlowerbox%
+		\advance\pgf at x.5\wd\pgfnodepartupperbox%
+		\pgfmathsetlength\pgf at y{\pgfkeysvalueof{/pgf/inner ysep}}%
+		\pgf at y-2.0\pgf at y%
+		%\advance\pgf at y-\pgflinewidth%
+		\advance\pgf at y-\dp\pgfnodepartupperbox%
+		\advance\pgf at y-\ht\pgfnodepartlowerbox%
+		%%%%%%
+	                   \pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/gap}}%
+		 %%%%%%%
+		\advance\pgf at y-\pgf at ya%	%% Added by TSR for gap
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%%% 
+		\advance\pgf at y-0.5\pgf at ya%
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width lower}}%%% 
+		\advance\pgf at y-0.5\pgf at ya%
+	}
+	\savedanchor\uppercenterpoint{% NOTE: *Not* the same as anchor "upper center" (this saved anchor is in the middle of the line)
+		\pgf at x.5\wd\pgfnodepartupperbox%
+		\pgfmathsetlength\pgf at y{-\pgfkeysvalueof{/pgf/inner ysep}}%
+		\advance\pgf at y-\dp\pgfnodepartupperbox%
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%%%
+		\advance\pgf at y-.5\pgf at ya%
+	}%
+\savedanchor{\greaterlinewidth}{%since seemingly hard to include conditional calculations in anchors (!)
+	\pgfmathsetlength{\pgf at xa}{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%
+	\pgfmathsetlength{\pgf at x}{\pgfkeysvalueof{/tikz/swig hsplit/line width lower}}%% 
+	\ifdim\pgf at xa>\pgf at x%
+         \pgf at x\pgf at xa%
+         \fi%
+         \pgf at y0pt%
+}%
+	\savedanchor\basepoint{%
+		\pgf at x.5\wd\pgfnodepartupperbox%
+		\pgf at y0pt\relax%
+	}%
+	\savedanchor\gapcenter{%
+	\pgf at x.5\wd\pgfnodepartupperbox%
+	\pgfmathsetlength\pgf at y{-\pgfkeysvalueof{/pgf/inner ysep}}%
+	\advance\pgf at y-\dp\pgfnodepartupperbox%
+	\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%%%
+	\advance\pgf at y-.75\pgf at ya%
+	\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width lower}}%%%
+	\advance\pgf at y.25\pgf at ya%
+	%%%%%%%
+	                   \pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/gap}}%
+	%%%%%%%
+	\advance\pgf at y-.5\pgf at ya%
+	\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%Added to allow for different widths
+		\pgfmathsetlength\pgf at yb{\pgfkeysvalueof{/tikz/swig hsplit/line width lower}}%% of lines upper and lower
+	}%
+	\savedanchor\basepointlower{%
+		\pgf at x.5\wd\pgfnodepartupperbox%
+		%
+		\pgfmathsetlength\pgf at y{\pgfkeysvalueof{/pgf/inner ysep}}%
+		\pgf at y-2.0\pgf at y%
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%%% 
+		\advance\pgf at y-0.5\pgf at ya%
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width lower}}%%% 
+		\advance\pgf at y-0.5\pgf at ya%
+		\advance\pgf at y-\dp\pgfnodepartupperbox%
+		\advance\pgf at y-\ht\pgfnodepartlowerbox%
+		%%%%%%%%%
+	                   \pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/gap}}%
+		%%%%%%%%%%
+		\advance\pgf at y-\pgf at ya%	%% Added by TSR for gap
+	}%
+	\savedanchor\midpoint{%
+		\pgf at x.5\wd\pgfnodepartupperbox%
+		\pgfmathsetlength\pgf at y{.5ex}%
+	}%
+	\savedanchor\midpointlower{%
+		\pgf at x.5\wd\pgfnodepartupperbox% Note: Origin is SW corner of upper text box
+		%
+		\pgfmathsetlength\pgf at y{\pgfkeysvalueof{/pgf/inner ysep}}%
+		\pgf at y-2.0\pgf at y%
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%%% 
+		\advance\pgf at y-0.5\pgf at ya%
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/line width lower}}%%% 
+		\advance\pgf at y-0.5\pgf at ya%
+		\advance\pgf at y-\dp\pgfnodepartupperbox%
+		\advance\pgf at y-\ht\pgfnodepartlowerbox%
+		%%%%%%%%%
+	                   \pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig hsplit/gap}}%
+		%%%%%%%%%%
+		\advance\pgf at y-\pgf at ya%	
+		\pgfmathsetlength\pgf at ya{.5ex}%
+		\advance\pgf at y\pgf at ya%
+	}%
+	\anchor{upper center}{\linewidthupper\pgf at ya-.5\pgf at y\uppercenterpoint\advance\pgf at y\pgf at ya}
+	%%% Required see PGF Manual p.1036
+	\anchor{center}{\gapcenter}
+	\anchor{lower center}{\linewidthlower\pgf at ya.5\pgf at y\gap\advance\pgf at ya-\pgf at y\uppercenterpoint\advance\pgf at y\pgf at ya}%
+	%\pgfpointadd{\uppercenterpoint}{\gap\pgf at y-\pgf at y}}
+	\anchor{lower}{\lower}
+	\anchor{upper}{\upper}
+	\anchor{text}{\upper}
+	\anchor{lower base}{\basepointlower}
+	\anchor{lower mid}{\midpointlower}
+	\anchor{mid}{\midpoint}
+	\anchor{mid east}{\greaterlinewidth\pgf at xa.5\pgf at x\radii\advance\pgf at xa\pgf at x\midpoint\advance\pgf at x\pgf at xa}
+	\anchor{mid west}{\greaterlinewidth\pgf at xa.5\pgf at x\radii\advance\pgf at xa\pgf at x\midpoint\advance\pgf at x-\pgf at xa}
+	\anchor{upper base}{\basepoint}
+	\anchor{base}{\basepoint}
+	\anchor{base east}{\greaterlinewidth\pgf at xa.5\pgf at x\radii%call \radii;  this sets pgf at x and pgf at y
+				\advance\pgf at xa\pgf at x%store pgf at x into pgf at xa
+				\basepoint %call \basepoint; this sets pgf at x and pgf at y
+	\advance\pgf at x\pgf at xa}  %  Add \pgf at xa to contents of \pgf at x (!!)
+%%															
+	\anchor{base west}{\greaterlinewidth\pgf at xa.5\pgf at x\radii\advance\pgf at xa\pgf at x\basepoint\advance\pgf at x-\pgf at xa}
+	\anchor{north}{\linewidthupper\pgf at ya.5\pgf at y\radii\advance\pgf at ya\pgf at y\uppercenterpoint\advance\pgf at y\pgf at ya}%
+	%\pgfpointadd{\uppercenterpoint}{\radii\pgf at x0pt}}%
+	\anchor{south}{\linewidthlower\pgf at ya-.5\pgf at y\gap\advance\pgf at ya-\pgf at y\radii\advance\pgf at ya-\pgf at y\uppercenterpoint\advance\pgf at y\pgf at ya}%
+	%\pgfpointadd{\uppercenterpoint}{\radii\pgf at ya-\pgf at y\gap\pgf at y-\pgf at y\advance\pgf at y\pgf at ya\pgf at x0pt}}%
+	\anchor{west}{\pgfpointadd{\gapcenter}{\greaterlinewidth%
+									\pgf at xa-.5\pgf at x%
+									\radii%
+									\pgf at x-\pgf at x%
+									\advance\pgf at x\pgf at xa%
+									\pgf at y0pt}}%
+	\anchor{east}{\pgfpointadd{\gapcenter}{\greaterlinewidth%
+									\pgf at xa.5\pgf at x%
+									\radii%
+									\advance\pgf at x\pgf at xa%
+									\pgf at y0pt}}%
+	\anchor{upper east}{\pgfpointadd{\uppercenterpoint}{\linewidthupper\pgf at xa\pgf at y\radii\pgf at y0pt\advance\pgf at x.5\pgf at xa}}%%% %
+	\anchor{upper west}{\pgfpointadd{\uppercenterpoint}{\linewidthupper\pgf at xa\pgf at y\radii\pgf at x-\pgf at x\pgf at y0pt\advance\pgf at x-0.5\pgf at xa}}%	
+	\anchor{lower west}{\pgfpointadd{\uppercenterpoint}{\linewidthlower\pgf at xa\pgf at y\radii\pgf at xb-\pgf at x\advance\pgf at xb-0.5\pgf at xa\gap\pgf at y-\pgf at y\pgf at x\pgf at xb}}%
+	\anchor{lower east}{\pgfpointadd{\uppercenterpoint}{\linewidthlower\pgf at xa\pgf at y\radii\pgf at xb\pgf at x\advance\pgf at xb0.5\pgf at xa\gap\pgf at y-\pgf at y\pgf at x\pgf at xb}}%
+	\anchor{north west}{\pgfpointadd{\uppercenterpoint}{\linewidthupper\pgf at ya\pgf at y%
+	                                 \radii\advance\pgf at x.5\pgf at ya\advance\pgf at y.5\pgf at ya%
+	                                 \pgf at x-0.707106\pgf at x\pgf at y0.707106\pgf at y}}%
+	\anchor{south west}{\pgfpointadd{\uppercenterpoint}{\linewidthlower\pgf at ya\pgf at y%
+					\radii\advance\pgf at x.5\pgf at ya\advance\pgf at y.5\pgf at ya%
+					\pgf at xa-0.707106\pgf at x\pgf at ya-0.707106\pgf at y%
+					\gap\pgf at y-\pgf at y\advance\pgf at y\pgf at ya\pgf at x\pgf at xa}}%
+	\anchor{north east}{\pgfpointadd{\uppercenterpoint}{\linewidthupper\pgf at ya\pgf at y%
+					\radii\advance\pgf at x.5\pgf at ya\advance\pgf at y.5\pgf at ya%
+                                   	\pgf at x0.707106\pgf at x\pgf at y0.707106\pgf at y}}%
+	\anchor{south east}{\pgfpointadd{\uppercenterpoint}{\linewidthlower\pgf at ya\pgf at y%
+					\radii\advance\pgf at x.5\pgf at ya\advance\pgf at y.5\pgf at ya%
+					\pgf at xa0.707106\pgf at x\pgf at ya-0.707106\pgf at y%
+					\gap\pgf at y-\pgf at y\advance\pgf at y\pgf at ya\pgf at x\pgf at xa}}%
+%%%%%%%%% START OF DRAWING HSPLIT
+%%%% Upper
+\beforebackgroundpath{%
+        \edef\defaultpgflinewidth{\the\pgflinewidth}% store default line width
+	 \pgfsetstrokecolor{\uppercolor}%
+	  \pgfsetfillcolor{\upperfillcolor}%
+	         \expandafter\pgfsetlinewidth\expandafter{\pgfkeysvalueof{/tikz/swig hsplit/line width upper}}%
+	          \expandafter\pgfsetinnerlinewidth\expandafter{\pgfkeysvalueof{/tikz/swig hsplit/inner line width upper}}%
+		\radii%
+		\pgfmathaddtolength\pgf at x{-\pgfkeysvalueof{/pgf/outer xsep}}%
+		\pgfmathaddtolength\pgf at y{-\pgfkeysvalueof{/pgf/outer ysep}}%
+		\pgfutil at tempdima\pgf at x%
+		\pgfutil at tempdimb\pgf at y%
+		\pgfpathmoveto{\uppercenterpoint\advance\pgf at x-\pgfutil at tempdima}%
+		\pgfpatharcaxes{180}{0}{\pgfpoint{\the\pgfutil at tempdima}{0pt}}{\pgfpoint{0pt}{\the\pgfutil at tempdimb}}%
+		\pgfpathclose
+		\pgfusepath{stroke,fill}
+%%%%%% Lower
+  \pgfsetlinewidth\defaultpgflinewidth% Reset \the\pgflinewidth to default value (in case changed while drawing upper)
+   % \expandafter\pgfsetstrokecolor\expandafter{\pgfkeysvalueof{/tikz/swig hsplit/line color lower}}% old approach
+  \pgfsetstrokecolor{\lowercolor}%
+    \pgfsetfillcolor{\lowerfillcolor}%
+                  \expandafter\pgfsetlinewidth\expandafter{\pgfkeysvalueof{/tikz/swig hsplit/line width lower}}% original
+                    \expandafter\pgfsetinnerlinewidth\expandafter{\pgfkeysvalueof{/tikz/swig hsplit/inner line width lower}}%
+               	\radii%
+		\pgfmathaddtolength\pgf at x{-\pgfkeysvalueof{/pgf/outer xsep}}%
+		\pgfmathaddtolength\pgf at y{-\pgfkeysvalueof{/pgf/outer ysep}}%
+		\pgfutil at tempdima\pgf at x%
+		\pgfutil at tempdimb\pgf at y%
+		\pgfpathmoveto{\uppercenterpoint\pgf at xa\pgf at x\pgf at ya\pgf at y\advance\pgf at xa\pgfutil at tempdima%
+		\gap\advance\pgf at ya-\pgf at y%
+		\pgf at x\pgf at xa\pgf at y\pgf at ya%
+		}%
+		\pgfpatharcaxes{180}{360}{\pgfpoint{-\the\pgfutil at tempdima}{0pt}}{\pgfpoint{0pt}{\the\pgfutil at tempdimb}}%
+		\pgfpathclose%
+		\pgfusepath{stroke,fill}%
+	}
+	\anchorborder{%
+  	\pgfextract at process\externalpoint{}%  %https://tex.stackexchange.com/questions/255492/storing-a-pgfpoint-for-repeated-use
+	%%%%%   This stores the current \pgf at x and \pgf at y in the macro \externalpoint
+	\linewidthupper%
+	\pgf at ya\pgf at y%
+  		\radii%
+	\advance\pgf at x.5\pgf at ya% add half-line width to x radius
+	\advance\pgf at y.5\pgf at ya% add line width to y radius
+  	\edef\pgf at marshal{%
+   		\noexpand\pgfpointadd{\noexpand\pgfpointborderellipse{\noexpand\externalpoint}%
+   			{\noexpand\pgfpoint{\the\pgf at x}{\the\pgf at y}}}{\noexpand\uppercenterpoint}%
+   	}%  
+   	\pgf at marshal%
+	\pgf at xa\pgf at x% store the border point
+	\pgf at ya\pgf at y% store the border point
+	\uppercenterpoint%
+	\pgf at yb\pgf at y% store center for upper ellipse
+	\pgf at xb\pgf at x% store center for upper ellipse
+	\ifdim\pgf at ya<\pgf at yb% if the borderpoint is below center of upper ellipse
+% if the border point is below bottom of upper ellipse start over 
+%	                                         %the lower ellipse start over (since lower ellipse may have different thickness)
+		\linewidthlower%
+			\pgf at ya\pgf at y%
+  			\radii%
+			\advance\pgf at x.5\pgf at ya% add half-line width to x radius
+			\advance\pgf at y.5\pgf at ya% add half line width to y radius
+  			\edef\pgf at marshal{%
+   			\noexpand\pgfpointadd{\noexpand\pgfpointborderellipse{\noexpand\externalpoint}%
+   			{\noexpand\pgfpoint{\the\pgf at x}{\the\pgf at y}}}{\noexpand\uppercenterpoint}%
+   			}%  
+   			\pgf at marshal%
+			\pgf at xa\pgf at x% store the border point
+			\pgf at ya\pgf at y% store the border point
+			\gap%
+			\advance\pgf at ya-\pgf at y%  move y coord of border point down
+	\fi%
+	\pgf at x\pgf at xa% 
+	\pgf at y\pgf at ya% 
+  }%
+}
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%% swig vertical split
+%%% This is a multi-part node consisting of an ellipse split vertically into 
+%%% left and right parts
+%%% The text boxes adjust to the size of the text contained in them
+%%% (The split may be off-center in order to keep the ellipse smaller.)
+
+
+%%%%% START OF V-SPLIT SWIG
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%Very useful code allows groups of options to be set as: [...  shape=swig vsplit, swig vsplit={ .... }]
+\pgfkeys{/tikz/swig vsplit/.code={%
+              \pgfkeys{/tikz/swig vsplit/.cd,#1}%  
+               }}%
+\pgfkeys{/tikz/swig vsplit/line color left/.initial = \pgfutil at empty}%    
+\pgfkeys{/tikz/swig vsplit/line color right/.initial = \pgfutil at empty}%
+\pgfkeys{/tikz/swig vsplit/fill color left/.initial = \pgfutil at empty}%    
+\pgfkeys{/tikz/swig vsplit/fill color right/.initial = \pgfutil at empty}%
+\pgfkeys{/tikz/swig vsplit/gap/.initial = 0.8em}%
+\pgfkeys{/tikz/swig vsplit/line width left/.initial = \the\pgflinewidth}%
+\pgfkeys{/tikz/swig vsplit/line width right/.initial = \the\pgflinewidth}%
+\pgfkeys{/tikz/swig vsplit/inner line width left/.initial = 0pt}%
+\pgfkeys{/tikz/swig vsplit/inner line width right/.initial = 0pt}%
+%\pgfkeys{/tikz/swig vsplit/prop/.initial = 0.5}%  
+
+\newbox\pgfnodepartleftbox  %%Associated with anchor "left"; see pgfmanual3.1, page 1035
+\newbox\pgfnodepartrightbox %%Associated with anchor "right"; see pgfmanual3.1, page 1035
+
+
+%%%
+%%%
+%% Rectangle "box" contents (with gap=0)
+%% 0.5 inner xsep + lefttextbox + inner xsep + 0.5 linewidthleft + gap + 0.5 linewidthright + righttextbox + 0.5 innerxsep
+%% origin is at left side of lefttextbox
+%%%
+\pgfdeclareshape{swig vsplit}{%
+	\nodeparts{left,right}
+	\savedmacro\leftcolor{%
+	       \edef\tikz at temp{\pgfkeysvalueof{/tikz/swig vsplit/line color left}}%
+	          \ifx\tikz at temp\pgfutil at empty\relax% 
+	                  \ifx\tikz at strokecolor\pgfutil at empty%if not defined even with draw=
+	                  \def\leftcolor{.}%
+	                \else%
+	                    \def\leftcolor{\tikz at strokecolor}% if defined with draw=
+	                \fi%
+	              \else%
+	               \def\leftcolor{\expandafter\pgfkeysvalueof{/tikz/swig vsplit/line color left}}%if defined
+	              \fi} %%%Important: adding { } around the last def statement would break this
+	  \savedmacro\rightcolor{%
+	       \edef\tikz at temp{\pgfkeysvalueof{/tikz/swig vsplit/line color right}}%
+	          \ifx\tikz at temp\pgfutil at empty\relax% 
+	                  \ifx\tikz at strokecolor\pgfutil at empty%if not defined even with draw=
+	                  \def\rightcolor{.}%
+	                \else%
+	                    \def\rightcolor{\tikz at strokecolor}% if defined with draw=
+	                \fi%
+	              \else%
+	               \def\rightcolor{\expandafter\pgfkeysvalueof{/tikz/swig vsplit/line color right}}%if defined
+	              \fi} %%%Important: adding { } around the last def statement would break this
+%	
+\savedmacro\leftfillcolor{%
+	       \edef\tikz at temp{\pgfkeysvalueof{/tikz/swig vsplit/fill color left}}%
+	          \ifx\tikz at temp\pgfutil at empty\relax% 
+	                  \ifx\tikz at fillcolor\pgfutil at empty%if not defined even with draw=
+	                  \def\leftfillcolor{white}%
+	                \else%
+	                    \def\leftfillcolor{\tikz at fillcolor}% if defined with draw=
+	                \fi%
+	              \else%
+	               \def\leftfillcolor{\expandafter\pgfkeysvalueof{/tikz/swig vsplit/fill color left}}%if defined
+	              \fi} %%%Important: adding { } around the last def statement would break this
+	  \savedmacro\rightfillcolor{%
+	       \edef\tikz at temp{\pgfkeysvalueof{/tikz/swig vsplit/fill color right}}%
+	          \ifx\tikz at temp\pgfutil at empty\relax% 
+	                  \ifx\tikz at fillcolor\pgfutil at empty%if not defined even with draw=
+	                  \def\rightfillcolor{white}%
+	                \else%
+	                    \def\rightfillcolor{\tikz at fillcolor}% if defined with draw=
+	                \fi%
+	              \else%
+	               \def\rightfillcolor{\expandafter\pgfkeysvalueof{/tikz/swig vsplit/fill color right}}%if defined
+	              \fi} %%%Important: adding { } around the last def statement would break this
+%	
+\savedanchor\gap{% This is a coordinate, but \pgf at y is redundant
+	\pgfmathsetlength\pgf at x{\pgfkeysvalueof{/tikz/swig vsplit/gap}}%
+	\pgfmathsetlength\pgf at y{0pt}%
+	}%
+\savedanchor\linewidthleft{% This is a coordinate, but \pgf at x is redundant
+       \pgfmathsetlength\pgf at y{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%
+       \pgfmathsetlength\pgf at x{0pt}%
+        }%
+\savedanchor\linewidthright{% This is a coordinate, but \pgf at x is redundant
+       \pgfmathsetlength\pgf at y{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%
+       \pgfmathsetlength\pgf at x{0pt}%
+        }%
+\savedmacro\vsplitangle{%
+		\pgf at xa\wd\pgfnodepartleftbox%
+		\pgf at xb\wd\pgfnodepartrightbox%
+		\pgfmathsetlength\pgf at x{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at xa1.5\pgf at x% inner xsep only added left of gap
+		\advance\pgf at xb1.5\pgf at x% inner xsep only added right of gap
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%Added to allow for different widths
+		\pgfmathsetlength\pgf at yb{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%% of lines upper and lower
+		\advance\pgf at xa.5\pgf at ya% Add width of line for left part (strictly, 2x half for each side of left half)
+		\advance\pgf at xb.5\pgf at yb% Add width of line for left part (strictly 2x half for each side of right half)
+	\pgfmathsetmacro{\vsplitangle}{acos((\pgf at xa-\pgf at xb)/(1.414213*(\pgf at xa+\pgf at xb)))}%
+	%\pgfmathsetlength\pgf at x{0pt}%
+	%\pgfmathsetlength\pgf at y{0pt}%
+	}%
+\savedanchor\radii{%
+		\pgfmathsetlength\pgf at x{\pgfkeysvalueof{/pgf/inner xsep}}%
+		%\pgf at x2.0\pgf at x% outer x sep added to both halves
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%Added to allow for different widths
+		\pgfmathsetlength\pgf at yb{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%% of lines left and right
+		\pgf at xa\wd\pgfnodepartleftbox%
+		\pgf at xb\wd\pgfnodepartrightbox%
+		\advance\pgf at xa1.5\pgf at x% add inner x sep to left half;
+		\advance\pgf at xa.5\pgf at ya% Add half width of line for left part 
+		\advance\pgf at xb1.5\pgf at x% add inner x sep to right half
+		\advance\pgf at xb.5\pgf at yb% Add half width of line for right part 
+		\advance\pgf at xb\pgf at xa% add left and right box lengths together
+		\pgf at xa.5\pgf at xb% divide by 2
+		\pgf at x1.414213\pgf at xa% compute radius (based on intersect of rectangle box and ellipse at 45 degrees
+		%%%%%%%
+		\pgfmathsetlength\pgf at y{\pgfkeysvalueof{/pgf/inner ysep}}%
+%%%%
+		\pgf at ya\ht\pgfnodepartleftbox%
+		\advance\pgf at ya\dp\pgfnodepartleftbox%
+		\pgf at yb\ht\pgfnodepartrightbox%
+		\advance\pgf at yb\dp\pgfnodepartrightbox%
+		\advance\pgf at ya\pgf at y%
+		\advance\pgf at yb\pgf at y%
+		\ifdim\pgf at ya>\pgf at yb%
+			\pgf at y1.414213\pgf at ya% compute 2x radius
+		\else%
+			\pgf at y1.414213\pgf at yb% compute 2x radius
+		\fi%
+		\pgf at y.5\pgf at y % divide by 2
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/minimum width}}%
+		\pgfmathsetlength\pgf at ya{\pgfkeysvalueof{/pgf/minimum height}}%
+		\ifdim\pgf at x<.5\pgf at xa%
+			\pgf at x.5\pgf at xa%
+		\fi%
+		\ifdim\pgf at y<.5\pgf at ya%
+			\pgf at y.5\pgf at ya%
+		\fi%
+		\pgfmathaddtolength\pgf at x{\pgfkeysvalueof{/pgf/outer xsep}}%
+		\pgfmathaddtolength\pgf at y{\pgfkeysvalueof{/pgf/outer ysep}}%
+	}%
+\savedanchor\left{%
+	\pgf at x0pt\pgf at y0pt\relax%
+	}%
+\savedanchor\right{%
+%		%%%%\pgf at x.5\wd\pgfnodepartrightbox%
+		\pgf at x\wd\pgfnodepartleftbox%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at x2.0\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/gap}}%%% Added by TSR store gap distance in ya register
+		\advance\pgf at x\pgf at xa%	%% Added by TSR for gap
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%%% 
+		\advance\pgf at x.5\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%%% 
+		\advance\pgf at x.5\pgf at xa%
+		\pgf at y0pt\relax%
+	}%
+\savedanchor\centerleftgapside{%
+		\pgf at x\wd\pgfnodepartleftbox%
+		%\advance\pgf at x\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at x\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%%% 
+		\advance\pgf at x.5\pgf at xa%
+		%%%%% Repeated code fragment to compute max box height
+		\pgf at ya\ht\pgfnodepartleftbox%
+		\advance\pgf at ya-\dp\pgfnodepartleftbox%
+		\pgf at yb\ht\pgfnodepartrightbox%
+		\advance\pgf at yb-\dp\pgfnodepartrightbox%
+		\ifdim\pgf at ya>\pgf at yb%
+			\pgf at y.5\pgf at ya% 
+		\else%
+			\pgf at y.5\pgf at yb% 
+		\fi%
+		%%%%% End repeated code fragment to compute box height
+	}%
+\savedanchor\globalcenterpoint{%
+		\pgf at x\wd\pgfnodepartleftbox%
+		\pgf at x.5\pgf at x%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at x1\pgf at xa% (0.5 x 3)-1 inner xsep since on each side of gap) 
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/gap}}%
+		\advance\pgf at x.5\pgf at xa%
+		%\advance\pgf at x\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%%% 
+		\advance\pgf at x.25\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%% 
+		\advance\pgf at x.25\pgf at xa%
+		\pgf at xa\wd\pgfnodepartrightbox%
+		\advance\pgf at x.5\pgf at xa%
+		\pgf at ya\ht\pgfnodepartleftbox%
+		\advance\pgf at ya-\dp\pgfnodepartleftbox%
+		\pgf at yb\ht\pgfnodepartrightbox%
+		\advance\pgf at yb-\dp\pgfnodepartrightbox%
+		\ifdim\pgf at ya>\pgf at yb%
+			\pgf at y.5\pgf at ya% 
+		\else%
+			\pgf at y.5\pgf at yb% 
+		\fi%
+	}%
+\savedanchor\linewidthatwidestcenter{% coordinate, but x is redundant
+% Slightly obsessive check to find either left or right line width
+%   Depending on whether left or right contains the vertical radius.                                  
+		\pgf at x\wd\pgfnodepartleftbox%
+		\pgf at x.5\pgf at x%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at x\pgf at xa% (0.5 x 3) -1 inner xsep since on each side of gap) 
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%%% 
+		\advance\pgf at x.25\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%% of lines left and right
+		\advance\pgf at x.25\pgf at xa%
+		\pgf at xa\wd\pgfnodepartrightbox%
+		\advance\pgf at x.5\pgf at xa% This contains x-coord of left center but this may not be the widest point 
+		                                          % if the global center is right of the gap
+		\pgf at xa\wd\pgfnodepartleftbox%
+		\pgfmathsetlength\pgf at xb{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at xa\pgf at xb%
+		\pgfmathsetlength\pgf at xb{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%%% 
+		\advance\pgf at xa.5\pgf at xb%
+		\ifdim\pgf at x>\pgf at xa%
+		\pgfmathsetlength\pgf at y{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%
+		\else
+		\pgfmathsetlength\pgf at y{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%
+		\fi%
+		%
+		\pgf at x0pt% 
+	}%
+\savedanchor\leftcenter{%
+		\pgf at x\wd\pgfnodepartleftbox%
+		\pgf at x.5\pgf at x%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at x\pgf at xa% (0.5 x 3)-0.5 inner xsep since on each side of gap) 
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%%% 
+		\advance\pgf at x.25\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%% of lines left and right
+		\advance\pgf at x.25\pgf at xa%
+		\pgf at xa\wd\pgfnodepartrightbox%
+		\advance\pgf at x.5\pgf at xa% 
+		%% 
+		\pgf at ya\ht\pgfnodepartleftbox%
+		\advance\pgf at ya-\dp\pgfnodepartleftbox%
+		\pgf at yb\ht\pgfnodepartrightbox%
+		\advance\pgf at yb-\dp\pgfnodepartrightbox%
+		\ifdim\pgf at ya>\pgf at yb%
+			\pgf at y.5\pgf at ya% 
+		\else%
+			\pgf at y.5\pgf at yb% 
+		\fi%
+	}%
+\savedanchor\rightcenter{%
+		\pgf at x\wd\pgfnodepartleftbox%
+		\pgf at x.5\pgf at x%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at x\pgf at xa% (0.5 x twice inner xsep since on each side of gap) 
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/gap}}% for right center
+		\advance\pgf at x\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%%% 
+		\advance\pgf at x.25\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%% of lines left and right
+		\advance\pgf at x.25\pgf at xa%
+		\pgf at xa\wd\pgfnodepartrightbox%
+		\advance\pgf at x.5\pgf at xa% 
+		%% 
+		\pgf at ya\ht\pgfnodepartleftbox%
+		\advance\pgf at ya-\dp\pgfnodepartleftbox%
+		\pgf at yb\ht\pgfnodepartrightbox%
+		\advance\pgf at yb-\dp\pgfnodepartrightbox%
+		\ifdim\pgf at ya>\pgf at yb%
+			\pgf at y.5\pgf at ya% 
+		\else%
+			\pgf at y.5\pgf at yb% 
+		\fi%
+	}%	
+\savedanchor\basepoint{%
+		\pgf at x.5\wd\pgfnodepartleftbox%
+		\pgf at y0pt\relax%
+	}%
+\savedanchor\basepointright{%
+		\pgf at x\wd\pgfnodepartleftbox%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at x2.0\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/gap}}%%% Added by TSR store gap distance in ya register
+		\advance\pgf at x\pgf at xa%	%% Added by TSR for gap
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%%% 
+		\advance\pgf at x0.5\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%%% 
+		\advance\pgf at x0.5\pgf at xa%	
+		\advance\pgf at x.5\wd\pgfnodepartrightbox%
+		\pgf at y0pt\relax%	
+	}%
+\savedanchor\midpointleft{%
+		\pgf at x.5\wd\pgfnodepartleftbox%
+		%%%% Repeated code fragment for max box height
+		\pgf at ya\ht\pgfnodepartleftbox%
+		\advance\pgf at ya-\dp\pgfnodepartleftbox%
+		\pgf at yb\ht\pgfnodepartrightbox%
+		\advance\pgf at yb-\dp\pgfnodepartrightbox%
+		\ifdim\pgf at ya>\pgf at yb%
+			\pgf at y.5\pgf at ya% 
+		\else%
+			\pgf at y.5\pgf at yb% 
+		\fi%
+	}%
+\savedanchor\midpointright{%
+			\pgf at x\wd\pgfnodepartleftbox%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+		\advance\pgf at x2.0\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/gap}}%%% Added by TSR store gap distance in ya register
+		\advance\pgf at x\pgf at xa%	%% Added by TSR for gap
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%%% 
+		\advance\pgf at x0.5\pgf at xa%
+		\pgfmathsetlength\pgf at xa{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%%% 
+		\advance\pgf at x0.5\pgf at xa%	
+		\advance\pgf at x.5\wd\pgfnodepartrightbox%
+		%%%% Repeated code fragment for max box height
+		\pgf at ya\ht\pgfnodepartleftbox%
+		\advance\pgf at ya-\dp\pgfnodepartleftbox%
+		\pgf at yb\ht\pgfnodepartrightbox%
+		\advance\pgf at yb-\dp\pgfnodepartrightbox%
+		\ifdim\pgf at ya>\pgf at yb%
+			\pgf at y.5\pgf at ya% 
+		\else%
+			\pgf at y.5\pgf at yb% 
+		\fi%	
+	}%
+%%%%%%%%%%%  ANCHORS	
+	%% Note: anchors left center and right center are the center of the left and right sides of the gap
+	%% These are not the same as saved anchors leftcenter and right center which are the centers of the left and right ellipse
+	\anchor{left center}{\linewidthleft\pgf at xa.5\pgf at y\centerleftgapside\advance\pgf at x\pgf at xa}
+	\anchor{right center}{\linewidthright\pgf at xa-.5\pgf at y\gap\advance\pgf at xa\pgf at x\centerleftgapside\advance\pgf at x\pgf at xa}
+	\anchor{left ellipse center}{\leftcenter}
+	\anchor{right ellipse center}{\rightcenter}
+	\anchor{left north}{\radii%
+		\pgf at ya\pgf at y%
+		\pgfmathsetlength\pgf at ya{\pgf at ya*(sin(\vsplitangle))}%
+		\linewidthleft\advance\pgf at ya.5\pgf at y%
+		\centerleftgapside\advance\pgf at y\pgf at ya%
+		}%
+	\anchor{left south}{\radii%
+		\pgf at ya\pgf at y%
+		\pgfmathsetlength\pgf at ya{\pgf at ya*(sin(\vsplitangle))}%
+		\linewidthleft\advance\pgf at ya.5\pgf at y%
+		\centerleftgapside\advance\pgf at y-\pgf at ya%
+		}%
+	\anchor{right north}{\pgfpointadd{\centerleftgapside}{%
+	        \radii%
+		\pgf at ya\pgf at y%
+		\pgfmathsetlength\pgf at ya{\pgf at ya*(sin(\vsplitangle))}%
+		\linewidthright\advance\pgf at ya.5\pgf at y%
+		\gap\pgf at y\pgf at ya%
+		}}%
+	\anchor{right south}{\pgfpointadd{\centerleftgapside}{%
+	        \radii%
+		\pgf at ya\pgf at y%
+		\pgfmathsetlength\pgf at ya{\pgf at ya*(sin(\vsplitangle))}%
+		\linewidthright\advance\pgf at ya.5\pgf at y%
+		\gap\pgf at y-\pgf at ya%
+		}}%
+	\anchor{left}{\left}
+	\anchor{text}{\left} %Added for compatibility (?)
+	\anchor{right}{\right}
+	\anchor{center}{\globalcenterpoint}
+	\anchor{right base}{\basepointright}
+	\anchor{left base}{\basepoint}
+	\anchor{base}{\basepoint} %% Added for compatibility
+	\anchor{right mid}{\midpointright}
+	\anchor{left mid}{\midpointleft}
+	\anchor{mid}{\midpointleft}
+	\anchor{mid east}{\pgfpointadd{\rightcenter}{\radii\pgf at xa\pgf at x\linewidthright\pgf at x.5\pgf at y\advance\pgf at xa\pgf at x\midpointright\pgf at x\pgf at xa}}%
+	\anchor{mid west}{\pgfpointadd{\leftcenter}{\radii\pgf at xa\pgf at x\linewidthleft\pgf at x.5\pgf at y\advance\pgf at xa\pgf at x\midpointleft\pgf at x-\pgf at xa}}%
+	\anchor{base east}{\pgfpointadd{\rightcenter\pgf at y0pt}{\radii\pgf at xa\pgf at x\linewidthright\pgf at x.5\pgf at y\advance\pgf at x\pgf at xa\pgf at y0pt}}%
+	\anchor{base west}{\pgfpointadd{\leftcenter\pgf at y0pt}{\radii\pgf at xa\pgf at x\linewidthleft\pgf at x.5\pgf at y\advance\pgf at xa\pgf at x\pgf at x-\pgf at xa\pgf at y0pt}}%
+		%\anchor{mid west}{\radii\pgf at xa\pgf at x\centerleftgapside\advance\pgf at x-\pgf at xa}
+	\anchor{base}{\basepoint}
+	\anchor{north}{\pgfpointadd{\globalcenterpoint}{\linewidthatwidestcenter\pgf at ya\pgf at y\radii\advance\pgf at y.5\pgf at ya\pgf at x0.0pt}}%
+	\anchor{south}{\pgfpointadd{\globalcenterpoint}{\linewidthatwidestcenter\pgf at ya\pgf at y\radii\pgf at y-\pgf at y\advance\pgf at y-.5\pgf at ya\pgf at x0pt}}% 
+	\anchor{east}{\pgfpointadd{\rightcenter}{\radii\pgf at xa\pgf at x\linewidthright\pgf at x.5\pgf at y\advance\pgf at x\pgf at xa\pgf at y0pt}}%
+	\anchor{west}{\pgfpointadd{\leftcenter}{\radii\pgf at xa-\pgf at x\linewidthleft\pgf at x-.5\pgf at y\advance\pgf at x\pgf at xa\pgf at y0pt}}%	
+	\anchor{north west}{\pgfpointadd{\leftcenter}{\linewidthleft\pgf at xa.5\pgf at y%
+	          \radii\advance\pgf at x\pgf at xa\advance\pgf at y\pgf at xa%
+	          \pgf at x-0.707106\pgf at x\pgf at y0.707106\pgf at y}}%
+	\anchor{south west}{\pgfpointadd{\leftcenter}{\linewidthleft\pgf at xa.5\pgf at y%
+	          \radii\advance\pgf at x\pgf at xa\advance\pgf at y\pgf at xa%
+	          \pgf at x-0.707106\pgf at x\pgf at y-0.707106\pgf at y}}%
+	\anchor{north east}{\pgfpointadd{\rightcenter}{\linewidthright\pgf at xa.5\pgf at y%
+	          \radii\advance\pgf at x\pgf at xa\advance\pgf at y\pgf at xa%
+	          \pgf at x0.707106\pgf at x\pgf at y0.707106\pgf at y}}%
+	\anchor{south east}{\pgfpointadd{\rightcenter}{\linewidthright\pgf at xa.5\pgf at y%
+	          \radii\advance\pgf at x\pgf at xa\advance\pgf at y\pgf at xa%
+	          \pgf at x0.707106\pgf at x\pgf at y-0.707106\pgf at y}}%
+%%%%%%%%% START OF DRAWING VSPLIT
+%%%%% Left
+\beforebackgroundpath{%
+         \edef\defaultpgflinewidth{\the\pgflinewidth}% store default line width
+          \pgfsetstrokecolor{\leftcolor}%
+           \pgfsetfillcolor{\leftfillcolor}%
+	 % \expandafter\pgfsetstrokecolor\expandafter{\pgfkeysvalueof{/tikz/swig vsplit/linecolorleft}}%
+	         \expandafter\pgfsetlinewidth\expandafter{\pgfkeysvalueof{/tikz/swig vsplit/line width left}}%
+	               \expandafter\pgfsetinnerlinewidth\expandafter{\pgfkeysvalueof{/tikz/swig vsplit/inner line width left}}%
+		\radii%
+		\pgfmathaddtolength\pgf at x{-\pgfkeysvalueof{/pgf/outer xsep}}%
+		\pgfmathaddtolength\pgf at y{-\pgfkeysvalueof{/pgf/outer ysep}}%
+		\pgfutil at tempdima\pgf at x%
+		\pgfutil at tempdimb\pgf at y%
+		\pgf at ya\pgf at y%
+		\pgfmathsetlength\pgf at ya{\pgf at ya*(sin(\vsplitangle))}%% compute y distance for off-center split
+		\pgfpathmoveto{\centerleftgapside\advance\pgf at y\pgf at ya}% set path to centerpoint + \pgf at ya
+		\pgfpatharcaxes{\vsplitangle}{360-\vsplitangle}{\pgfpoint{\the\pgfutil at tempdima}{0pt}}{\pgfpoint{0pt}{\the\pgfutil at tempdimb}}%
+		\pgfpathclose
+		\pgfusepath{stroke,fill}
+%%%%%% right
+     \pgfsetlinewidth\defaultpgflinewidth % Reset \the\pgflinewidth to default value (in case changed while drawing left)
+                 \pgfsetstrokecolor{\rightcolor}%
+                 \pgfsetfillcolor{\rightfillcolor}%
+                    \expandafter\pgfsetlinewidth\expandafter{\pgfkeysvalueof{/tikz/swig vsplit/line width right}}%
+                    \expandafter\pgfsetinnerlinewidth\expandafter{\pgfkeysvalueof{/tikz/swig vsplit/inner line width right}}%
+		\radii%
+		\pgfmathaddtolength\pgf at x{-\pgfkeysvalueof{/pgf/outer xsep}}%
+		\pgfmathaddtolength\pgf at y{-\pgfkeysvalueof{/pgf/outer ysep}}%
+		\pgfutil at tempdima\pgf at x%
+		\pgfutil at tempdimb\pgf at y%
+		\pgf at ya\pgf at y%
+		\pgfmathsetlength\pgf at yb{\pgf at ya*(sin(\vsplitangle))}%% compute y distance for off-center split
+		\pgfpathmoveto{\centerleftgapside\pgf at xa\pgf at x\pgf at ya\pgf at y\advance\pgf at ya\pgf at yb%
+		\gap\advance\pgf at xa\pgf at x%
+		\pgf at x\pgf at xa\pgf at y\pgf at ya%
+		}%
+		\pgfpatharcaxes{\vsplitangle}{-\vsplitangle}{\pgfpoint{\the\pgfutil at tempdima}{0pt}}{\pgfpoint{0pt}{\the\pgfutil at tempdimb}}%
+		\pgfpathclose%
+		\pgfusepath{stroke,fill}%
+	}
+	\anchorborder{%
+  	\pgfextract at process\externalpoint{}%  %https://tex.stackexchange.com/questions/255492/storing-a-pgfpoint-for-repeated-use
+	%%%%%   This stores the current \pgf at x and \pgf at y in the macro \externalpoint
+	\linewidthleft%
+	\pgf at ya\pgf at y%
+  		\radii%
+	\advance\pgf at x.5\pgf at ya% add half-line width to x radius
+	\advance\pgf at y.5\pgf at ya% add half line width to y radius
+  	\edef\pgf at marshal{%
+   		\noexpand\pgfpointadd{\noexpand\pgfpointborderellipse{\noexpand\externalpoint}%
+   			{\noexpand\pgfpoint{\the\pgf at x}{\the\pgf at y}}}{\noexpand\leftcenter}%
+   	}%  
+   	\pgf at marshal%
+	\pgf at xa\pgf at x% store the border point
+	\pgf at ya\pgf at y% store the border point
+	\centerleftgapside%
+	\pgf at xb\pgf at x% point on gap
+	\ifdim\pgf at xa>\pgf at xb%
+		\linewidthright%
+		\pgf at ya\pgf at y%
+  		\radii%
+		\advance\pgf at x.5\pgf at ya% add half-line width to x radius
+		\advance\pgf at y.5\pgf at ya% add half line width to y radius
+  		\edef\pgf at marshal{%
+   			\noexpand\pgfpointadd{\noexpand\pgfpointborderellipse{\noexpand\externalpoint}%
+   				{\noexpand\pgfpoint{\the\pgf at x}{\the\pgf at y}}}{\noexpand\rightcenter}%
+   	}%  
+	\pgf at marshal%
+	\else
+	\pgf at x\pgf at xa% 
+	\pgf at y\pgf at ya% 
+	\fi%
+  }%
+}
+
+
+\endinput


Property changes on: trunk/Master/texmf-dist/tex/latex/tikz-swigs/tikzlibraryswigs.code.tex
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Modified: trunk/Master/tlpkg/bin/tlpkg-ctan-check
===================================================================
--- trunk/Master/tlpkg/bin/tlpkg-ctan-check	2021-07-10 21:02:38 UTC (rev 59888)
+++ trunk/Master/tlpkg/bin/tlpkg-ctan-check	2021-07-10 21:03:16 UTC (rev 59889)
@@ -765,7 +765,7 @@
     tikz-kalender tikz-karnaugh tikz-ladder tikz-lake-fig tikz-layers
     tikz-nef tikz-network tikz-opm tikz-optics
     tikz-palattice tikz-planets tikz-qtree
-    tikz-relay tikz-sfc tikz-timing tikz-trackschematic tikz-truchet
+    tikz-relay tikz-sfc tikz-swigs tikz-timing tikz-trackschematic tikz-truchet
     tikzcodeblocks tikzducks tikzinclude tikzlings
     tikzmark tikzmarmots tikzorbital
     tikzpackets tikzpagenodes tikzpeople tikzpfeile tikzposter

Modified: trunk/Master/tlpkg/tlpsrc/collection-pictures.tlpsrc
===================================================================
--- trunk/Master/tlpkg/tlpsrc/collection-pictures.tlpsrc	2021-07-10 21:02:38 UTC (rev 59888)
+++ trunk/Master/tlpkg/tlpsrc/collection-pictures.tlpsrc	2021-07-10 21:03:16 UTC (rev 59889)
@@ -179,6 +179,7 @@
 depend tikz-qtree
 depend tikz-relay
 depend tikz-sfc
+depend tikz-swigs
 depend tikz-timing
 depend tikz-trackschematic
 depend tikz-truchet

Added: trunk/Master/tlpkg/tlpsrc/tikz-swigs.tlpsrc
===================================================================


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