From 568c49b6f47c72b1be977a58baf6b922f998a349 Mon Sep 17 00:00:00 2001
From: Karl Berry <karl@freefriends.org>
Date: Wed, 27 Jan 2021 22:04:47 +0000
Subject: sankey (27jan21)

git-svn-id: svn://tug.org/texlive/trunk@57535 c570f23f-e606-0410-a88d-b1316a301751
---
 Master/texmf-dist/tex/latex/sankey/sankey.sty | 722 ++++++++++++++++++++++++++
 1 file changed, 722 insertions(+)
 create mode 100644 Master/texmf-dist/tex/latex/sankey/sankey.sty

(limited to 'Master/texmf-dist/tex/latex/sankey/sankey.sty')

diff --git a/Master/texmf-dist/tex/latex/sankey/sankey.sty b/Master/texmf-dist/tex/latex/sankey/sankey.sty
new file mode 100644
index 00000000000..4c28a1fe0d4
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/sankey/sankey.sty
@@ -0,0 +1,722 @@
+% Copyright (C) 2016-2021 by Paul Gaborit
+%
+% This file may be distributed and/or modified
+%
+%   1. under the LaTeX Project Public License and/or
+%
+%   2. under the GNU Public License.
+
+\def\sankey@version{2.0}
+\def\sankey@date{2021/01/27}
+\ProvidesPackage{sankey}[\sankey@date\space\sankey@version\space sankey package]
+
+\RequirePackage{xparse}
+\RequirePackage{xfp}
+\RequirePackage{tikz}
+\usetikzlibrary{calc,decorations.markings,dubins}
+\usepackage{etoolbox}
+
+% add a new layer to debug sankey diagrams
+\pgfdeclarelayer{background}
+\pgfdeclarelayer{foreground}
+\pgfdeclarelayer{sankeydebug}
+\pgfsetlayers{background,main,foreground,sankeydebug}
+
+% flag to debug sankey diagrams
+\newtoggle{sankey debug}
+\newtoggle{sankey node start}
+\newtoggle{sankey node end}
+
+% macros to store and to retrieve the orientation and the quantity
+% associated with each sankey node
+
+\def\sankeysetnodeqty#1#2{\expandafter\xdef\csname sankey@node@#1@qty\endcsname{#2}}
+
+\def\sankeygetnodeqty#1{%
+  \ifcsmacro{sankey@node@#1@qty}{%
+    \csname sankey@node@#1@qty\endcsname%
+  }{%
+    \PackageWarning{sankey}{Unknown sankey node '#1'}%
+  }%
+}
+
+\def\sankeysetnodeorient#1#2{\expandafter\xdef\csname sankey@node@#1@orient\endcsname{#2}}
+
+\def\sankeygetnodeorient#1{%
+  \ifcsmacro{sankey@node@#1@orient}{%
+    \csname sankey@node@#1@orient\endcsname%
+  }{%
+    \PackageWarning{sankey}{Unknown sankey node '#1'}%
+  }%
+}
+
+\def\sankeysetstartfill#1#2{\expandafter\gdef\csname sankey@start@fill@#1\endcsname{#2}}
+\def\sankeysetstartdraw#1#2{\expandafter\gdef\csname sankey@start@draw@#1\endcsname{#2}}
+\def\sankeysetendfill#1#2{\expandafter\gdef\csname sankey@end@fill@#1\endcsname{#2}}
+\def\sankeysetenddraw#1#2{\expandafter\gdef\csname sankey@end@draw@#1\endcsname{#2}}
+%
+\def\sankeygetstartfill#1{\csname sankey@start@fill@#1\endcsname}
+\def\sankeygetstartdraw#1{\csname sankey@start@draw@#1\endcsname}
+\def\sankeygetendfill#1{\csname sankey@end@fill@#1\endcsname}
+\def\sankeygetenddraw#1{\csname sankey@end@draw@#1\endcsname}
+
+% new shape
+\pgfdeclareshape{sankey node}{
+  \inheritsavedanchors[from=rectangle]
+  \inheritanchor[from=rectangle]{center}
+  %\inheritanchorborder[from=rectangle]
+  \anchor{left}{\pgf@process{\northeast}}
+  \anchor{right}{\pgf@process{\southwest}}
+}
+
+% pgfkeys family 'sankey'
+\pgfkeys{/sankey/.is family}
+
+\NewDocumentCommand\sankeyset{m}{\pgfkeys{sankey,#1}}
+
+\sankeyset{
+  ratio length/.code={
+    \pgfmathsetmacro\sankeytotallen{#1}
+    \edef\sankeytotallen{\sankeytotallen pt}
+  },
+  ratio length/.value required,
+  ratio quantity/.code={\edef\sankeytotalqty{\fpeval{#1}}},
+  ratio quantity/.value required,
+  ratio/.style args={#1/#2}{
+    ratio length=#1,
+    ratio quantity=#2,
+  },
+  ratio/.value required,
+  minimum radius/.estore in=\sankeyminradius,
+  minimum radius/.value required,
+  outin steps/.estore in=\sankeystepoutin,
+  outon steps/.value required,
+  %
+  debug/.is choice,
+  debug/true/.code={\toggletrue{sankey debug}},
+  debug/false/.code={\togglefalse{sankey debug}},
+  debug/.default=true,
+  %
+  start style/.is choice,
+  %
+  end style/.is choice,
+  % default values
+  default parameters/.style={
+    % default values
+    ratio=1cm/10,
+    minimum radius=5mm,%
+    outin steps=10,
+    debug=false,
+    start style=none,
+    end style=none,
+  },
+  % to make node
+  node parameters/.style={
+    quantity/.code={%
+      %\typeout{quantity=##1}%
+      \edef\qty{\fpeval{##1}}%
+      %\typeout{qty=\qty}%
+    },
+    quantity/.value required,
+    angle/.code={%
+      %\typeout{angle:##1}%
+      \pgfmathsetmacro\orient{##1}%
+    },
+    angle/.value required,
+    name/.store in=\name,
+    name/.value required,
+    at/.store in=\pos,
+    at/.value required,
+    as/.style={
+      name=##1,
+      quantity=\sankeygetnodeqty{##1},
+      angle=\sankeygetnodeorient{##1},
+      at={##1.center},
+    },
+    as/.value required,
+    %
+    anchor/.is choice,
+    anchor/left/.code={\def\sankeyanchor{left}},
+    anchor/right/.code={\def\sankeyanchor{right}},
+    anchor/center/.code={\def\sankeyanchor{center}},
+    anchor=center,
+    %
+    start/.is choice,
+    start/true/.code={\toggletrue{sankey node start}},
+    start/false/.code={\togglefalse{sankey node start}},
+    start/.default=true,
+    start=false,
+    %
+    end/.is choice,
+    end/true/.code={\toggletrue{sankey node end}},
+    end/false/.code={\togglefalse{sankey node end}},
+    end/.default=true,
+    end=false,
+  },
+}
+
+% some styles
+\sankeyset{
+  node/.style={
+    shape=sankey node,
+    inner sep=0,minimum height={\sankeyqtytolen{#1}},
+    minimum width=0,draw=none,line width=0pt,
+    node contents={},
+  },
+  fill/.style={line width=0pt,fill=white},
+  draw/.style={draw=black,line width=.4pt},
+  % debug color used by all debug macros
+  debug color/.style={/utils/exec={\colorlet{debug color}{#1}}},
+  debug color=red!75!black,
+  % debug line between left and right anchors
+  debug line/.style={draw=debug color,|-|},
+  % debug line between center and label
+  debug normal/.style={draw=debug color},
+  % debug node label
+  debug label/.style={
+    draw,
+    font=\ttfamily\tiny,
+    text=debug color,text opacity=1,
+    inner sep=.1em,
+    fill=white,fill opacity=1,
+    rounded corners=.1em,
+  },
+}
+
+\sankeyset{
+  new start style/.code n args={3}{% name, fill path, draw path
+    \sankeysetstartfill{#1}{#2}
+    \sankeysetstartdraw{#1}{#3}
+    \sankeyset{start style/#1/.code={\def\sankeystartstyle{#1}}}
+  },
+  new end style/.code n args={3}{% name, fill path, draw path
+    \sankeysetendfill{#1}{#2}
+    \sankeysetenddraw{#1}{#3}
+    \sankeyset{end style/#1/.code={\def\sankeyendstyle{#1}}}
+  },
+}
+
+% the new 'sankeydiagram' environment
+\NewDocumentEnvironment{sankeydiagram}{O{}+b}{
+
+  \newcommand\sankeyarc[2]{% sn, en
+    \begingroup
+    \pgfmathsetmacro\startangle{\sankeygetnodeorient{##1}}
+    \pgfmathsetmacro\endangle{\sankeygetnodeorient{##2}}
+    \pgfmathsetmacro\rotateangle{\endangle-\startangle}
+    \pgfmathtruncatemacro\acwrotate{\rotateangle>0?1:0}
+    \path let
+    \p1=(##1.left),\p2=(##1.right),
+    \p3=(##2.left),\p4=(##2.right),
+    \n1={\sankeyqtytolen{\sankeygetnodeqty{##1}}},
+    \n{maxr}={\sankeyminradius+\n1},
+    \n{minr}={\sankeyminradius}
+    in \pgfextra{
+      \ifnumequal{\acwrotate}{1}{
+        \begin{pgfinterruptpath}
+          % fill the region
+          \path[/sankey/fill]
+          (\p1) arc(\startangle-90:\endangle-90:\n{minr}) -- (\p3) --
+          (\p4) arc(\endangle-90:\startangle-90:\n{maxr}) -- (\p2) -- cycle;
+          % draw left and right borders
+          \path[/sankey/draw]
+          (\p1) arc(\startangle-90:\endangle-90:\n{minr}) 
+          (\p4) arc(\endangle-90:\startangle-90:\n{maxr});
+        \end{pgfinterruptpath}
+      }{
+        \begin{pgfinterruptpath}
+          % fill the region
+          \path[/sankey/fill]
+          (\p1) arc(\startangle+90:\endangle+90:\n{maxr}) -- (\p3) --
+          (\p4) arc(\endangle+90:\startangle+90:\n{minr}) -- (\p2) -- cycle;
+          % draw left and right borders
+          \path[/sankey/draw]
+          (\p1) arc(\startangle+90:\endangle+90:\n{maxr}) 
+          (\p4) arc(\endangle+90:\startangle+90:\n{minr});
+        \end{pgfinterruptpath}
+      }
+    };
+    \endgroup
+  }
+
+  \newcommand\sankeymakenodenodebug{
+    \begingroup
+    \sankeysetnodeqty{\name}{\qty}
+    \sankeysetnodeorient{\name}{\orient}
+    % \typeout{\qty,\orient}
+    \ifundef{\sankeyanchor}{\def\sankeyanchor{center}}{}
+    \node[/sankey/node=\qty,rotate=\orient,at/.expanded={(\pos)},name=\name,anchor=\sankeyanchor];
+    \endgroup
+  }
+
+  \newcommand\sankeymakenode{
+    \begingroup
+    \sankeymakenodenodebug{}
+    \iftoggle{sankey debug}{
+      \begin{pgfonlayer}{sankeydebug}
+        \pgfset{
+          number format/relative*=-1,
+          number format/precision=1,
+          number format/fixed,
+        }
+        \path[/sankey/debug line] (\name.left) -- (\name.right);
+        \pgfmathsetmacro{\len}{\sankeyqtytolen{\qty}/3}
+        \path[/sankey/debug normal] (\name.center)
+        -- ($(\name.center)!\len pt!90:(\name.right)$)
+        node[/sankey/debug label,rotate=\orient+90,anchor=north] {\name:\pgfmathprintnumber{\qty}};
+      \end{pgfonlayer}
+    }{}
+    \endgroup
+  }
+  
+  \newcommand\sankeynodenodebug[1]{
+    \begingroup
+    \sankeyset{node parameters,##1}
+    %\typeout{sankeynodenodebug: '\name' at(\pos) angle(\orient) qty(\qty)}
+    \sankeymakenodenodebug{}
+    \endgroup
+  }
+
+  % ============================================================
+  % user commands
+  % ============================================================
+  
+  \NewDocumentCommand\sankeydubins{O{}mm}{% options, sn, en
+    \begingroup
+    \sankeyset{##1}
+    \pgfmathsetmacro\startangle{\sankeygetnodeorient{##2}}
+    \pgfmathsetmacro\endangle{\sankeygetnodeorient{##3}}
+    \edef\sqty{\sankeygetnodeqty{##2}}
+    \edef\eqty{\sankeygetnodeqty{##3}}
+    \ifdefstrequal{\sqty}{\eqty}{}{
+      \PackageError{sankey}%
+      {^^J*** \string\sankeyoutin: quantities differ between ##2 (\sqty) and ##3 (\eqty)^^J}%
+      {The quantities of the two Sankey nodes must be equal.}
+    }
+    \pgfmathsetmacro\qty{\sankeygetnodeqty{##2}}
+    \pgfmathsetmacro\width{\sankeyqtytolen{\qty}}
+    %\typeout{startangle:\startangle,endangle:\endangle,qty:\qty,width:\width}
+    \dubinspathset{
+      sankey/.style={
+        start point=##2.center,start angle=\startangle,
+        end point=##3.center,end angle=\endangle,
+        minimum radius=\sankeyminradius + .5 * \width pt,
+      },
+    }
+    \dubinspathcalc{sankey,store=sankey}
+    
+    \dubinspathset{
+      left border/.style={
+        sankey, use store=sankey,
+        left and right minimum radii=
+        {\sankeyminradius} and {\sankeyminradius + \width pt},
+      },
+      right border/.style={
+        sankey, use store=sankey,
+        left and right minimum radii=
+        {\sankeyminradius + \width pt} and {\sankeyminradius},
+      },
+    }
+    
+    \path let
+    \p1=(##2.left),\p2=(##2.right),
+    \p3=(##3.left),\p4=(##3.right)
+    in \pgfextra{
+      \begin{pgfinterruptpath}
+        % fill the region
+        \path[/sankey/fill]
+        (\p1)
+        \dubinspath{left border}
+        -- (\p3) --
+        (\p4) \dubinspath{right border,reverse}
+        -- (\p2) -- cycle;
+        
+        % draw left and right borders
+        \path[/sankey/draw]
+        (\p1)
+        \dubinspath{left border}
+        (\p2)
+        \dubinspath{right border}
+        ;
+      \end{pgfinterruptpath}
+    };
+    \endgroup
+  }
+  
+
+  \NewDocumentCommand\sankeyoutin{O{}mm}{% options, sn, en
+    \begingroup
+    \sankeyset{##1}
+    \edef\sn{##2}
+    \edef\en{##3}
+    \edef\sqty{\sankeygetnodeqty{\sn}}
+    \edef\eqty{\sankeygetnodeqty{\en}}
+    \ifdefstrequal{\sqty}{\eqty}{}{
+      \PackageError{sankey}%
+      {^^J*** \string\sankeyoutin: quantities differ between \sn (\sqty) and \en (\eqty)^^J}%
+      {The quantities of the two Sankey nodes must be equal.}
+    }
+    %\typeout{*** sankeyoutin: \sn\space to \en\space (\sankeystepoutin)}
+    \pgfmathsetmacro\qty{\sankeygetnodeqty{\sn}}
+    \pgfmathsetmacro\mylength{\sankeyqtytolen{\qty}/2}
+    \pgfmathsetmacro\mystep{1/\sankeystepoutin}
+    %\typeout{*** a}
+    \pgfmathsetmacro\mybound{1-.5*\mystep}
+    %\typeout{*** b}
+    \pgfmathsetmacro\laststep{int(\sankeystepoutin-1)}
+    %\typeout{sankeystepoutin(\sankeystepoutin) mystep(\mystep) mybound(\mybound) laststep(\laststep)}
+    %\typeout{*** sankeyoutin: \startangle to \endangle}
+    \path[decorate,overlay,decoration={
+      markings,
+      mark=between positions \mystep and \mybound step \mystep with {
+        \def\sankeyoutinmidptname{sankeyoutinmidpt \pgfkeysvalueof{/pgf/decoration/mark info/sequence number}}
+        \path
+        (0,0) coordinate(\sankeyoutinmidptname)
+        (0,-\mylength pt) coordinate (\sankeyoutinmidptname\space r)
+        (0,\mylength pt) coordinate (\sankeyoutinmidptname\space l)
+        ;
+      }
+    }](\sn.center) to[out=\sankeygetnodeorient{\sn},in=\sankeygetnodeorient{\en}+180] (\en.center);
+    \foreach \myptnum in {1,...,\laststep}{
+      \def\sankeyoutinmidptname{sankeyoutinmidpt \myptnum}
+      \anglebetween\sankeyoutinmidptangle{\sankeyoutinmidptname\space r}{\sankeyoutinmidptname\space l}
+      \sankeynodenodebug{quantity=\qty,angle=\sankeyoutinmidptangle-90,name=\sankeyoutinmidptname,at=\sankeyoutinmidptname}
+    }
+    \sankeynodenodebug{quantity=\sankeygetnodeqty{\sn},angle=\sankeygetnodeorient{\sn},name={sankeyoutinmidpt 0},at={\sn}}
+    \sankeynodenodebug{quantity={\sankeygetnodeqty{\en}},angle={\sankeygetnodeorient{\en}},name={sankeyoutinmidpt \sankeystepoutin},at={\en}}
+
+    %\typeout{*********************}
+    \path[/sankey/fill,looseness=1]
+    (sankeyoutinmidpt 0.left)
+    \foreach \curpt[remember=\curpt as \prevpt (initially 0)] in {1,...,\sankeystepoutin}{
+      to[out=\sankeygetnodeorient{sankeyoutinmidpt \prevpt},in=\sankeygetnodeorient{sankeyoutinmidpt \curpt}+180]
+      (sankeyoutinmidpt \curpt.left)
+    }
+    --
+    (sankeyoutinmidpt \sankeystepoutin.right)
+    \foreach \curpt[remember=\curpt as \prevpt (initially \sankeystepoutin)] in {\laststep,...,0}{
+      to[out=\sankeygetnodeorient{sankeyoutinmidpt \prevpt}+180,in=\sankeygetnodeorient{sankeyoutinmidpt \curpt}]
+      (sankeyoutinmidpt \curpt.right)
+    }
+    -- cycle;
+    
+    \path[/sankey/draw,looseness=1]
+    (sankeyoutinmidpt 0.left)
+    \foreach \curpt[remember=\curpt as \prevpt (initially 0)] in {1,...,\sankeystepoutin}{
+      to[out=\sankeygetnodeorient{sankeyoutinmidpt \prevpt},in=\sankeygetnodeorient{sankeyoutinmidpt \curpt}+180]
+      (sankeyoutinmidpt \curpt.left)
+    }
+    %
+    (sankeyoutinmidpt \sankeystepoutin.right)
+    \foreach \curpt[remember=\curpt as \prevpt (initially \sankeystepoutin)] in {\laststep,...,0}{
+      to[out=\sankeygetnodeorient{sankeyoutinmidpt \prevpt}+180,in=\sankeygetnodeorient{sankeyoutinmidpt \curpt}]
+      (sankeyoutinmidpt \curpt.right)
+    }
+    ;
+    
+    \endgroup
+  }
+  
+  \NewDocumentCommand\sankeynodealias{mm}{%name, alias
+    \path [late options={name=##1,alias=##2}];
+    \sankeysetnodeqty{##2}{\sankeygetnodeqty{##1}}
+    \sankeysetnodeorient{##2}{\sankeygetnodeorient{##1}}
+  }
+
+  \newcommand\sankeynode[2][]{
+    \begingroup
+    \sankeyset{##1}
+    \sankeyset{node parameters,##2}
+    %\typeout{sankeynode: '\name' at(\pos) angle(\orient) qty(\qty)}
+    \sankeymakenode{}
+    \endgroup
+  }
+
+  \def\sankeyfilldrawstart{
+    \begin{scope}[shift={(\name)},rotate=\orient]
+      \path[/sankey/fill] \sankeygetstartfill{\sankeystartstyle};
+      \path[/sankey/draw] \sankeygetstartdraw{\sankeystartstyle};
+    \end{scope}
+  }
+  
+  \NewDocumentCommand\sankeystart{O{}m}{
+    \begingroup
+    \sankeyset{##1}
+    \edef\name{##2}
+    \edef\orient{\sankeygetnodeorient{##2}}
+    \edef\qty{\sankeygetnodeqty{##2}}
+    \sankeyfilldrawstart
+    \endgroup
+  }
+
+  \NewDocumentCommand\sankeynodestart{O{}m}{
+    \begingroup
+    %\typeout{sankeynodestart: ##2}
+    \sankeyset{##1}
+    \sankeyset{node parameters,##2}
+    %\typeout{sankeynodestart: '\name' at(\pos) angle(\orient) qty(\qty)}
+    \sankeymakenode{}
+    %\typeout{sankeynodestart: sankeynode ok}
+    %\typeout{sankeynodestart: '\name' at(\pos) angle(\orient) qty(\qty)}
+    \sankeyfilldrawstart
+    \endgroup
+  }
+
+  \def\sankeyfilldrawend{
+    \begin{scope}[shift={(\name)},rotate=\sankeygetnodeorient{\name}]
+      \path[/sankey/fill] \sankeygetendfill{\sankeyendstyle};
+      \path[/sankey/draw] \sankeygetenddraw{\sankeyendstyle};
+    \end{scope}
+  }
+  
+  \NewDocumentCommand\sankeyend{O{}m}{%name
+    \begingroup
+    \sankeyset{##1}
+    \edef\name{##2}
+    \edef\orient{\sankeygetnodeorient{##2}}
+    \edef\qty{\sankeygetnodeqty{##2}}
+    \sankeyfilldrawend
+    \endgroup
+  }
+
+  \NewDocumentCommand\sankeynodeend{O{}m}{
+    \begingroup
+    %\typeout{sankeynodestart: ##2}
+    \sankeyset{##1}
+    \sankeyset{node parameters,##2}
+    %\typeout{sankeynodestart: '\name' at(\pos) angle(\orient) qty(\qty)}
+    \sankeymakenode{}
+    %\typeout{sankeynodestart: sankeynode ok}
+    %\typeout{sankeynodestart: '\name' at(\pos) angle(\orient) qty(\qty)}
+    \sankeyfilldrawend
+    \endgroup
+  }
+
+
+  
+  \NewDocumentCommand\sankeyadvance{sO{}mm}{% *(reverse), options, name, distance
+    \begingroup
+    \sankeyset{##2}
+    \def\newname{##3}
+    \def\oldname{##3-old}
+    \sankeynodealias{\newname}{\oldname}
+    % \typeout{*** sankeyadvance: ok (\oldname => \newname)}
+    \IfBooleanTF{##1}{
+      % reverse advance
+      \sankeynode{
+        at={$(\oldname.center)!##4!90:(\oldname.left)$},
+        angle=\sankeygetnodeorient{\oldname},
+        quantity=\sankeygetnodeqty{\oldname},
+        name=\newname,
+      }
+      \path[/sankey/fill]
+      (\newname.left) -- (\oldname.left)
+      --
+      (\oldname.right) -- (\newname.right)
+      -- cycle;
+      \path[/sankey/draw]
+      (\newname.left) -- (\oldname.left)
+      (\oldname.right) -- (\newname.right);
+      \endgroup
+    }{
+      % advance
+      \sankeynode{
+        at={$(\oldname.center)!##4!-90:(\oldname.left)$},
+        angle=\sankeygetnodeorient{\oldname},
+        quantity=\sankeygetnodeqty{\oldname},
+        name=\newname,
+      }
+      \path[/sankey/fill]
+      (\oldname.left) -- (\newname.left)
+      --
+      (\newname.right) -- (\oldname.right)
+      -- cycle;
+      \path[/sankey/draw]
+      (\oldname.left) -- (\newname.left)
+      (\newname.right) -- (\oldname.right);
+      \endgroup
+    }
+  }
+  
+  \NewDocumentCommand\sankeyturn{sO{}mm}{% *(reverse), options, name, angle
+    \begingroup
+    \sankeyset{##2}
+    \def\name{##3}
+    \def\oldname{##3-old}
+    \sankeynodealias{\name}{\oldname}
+    \pgfmathsetmacro\qty{\sankeygetnodeqty{\oldname}}
+    \pgfmathsetmacro\oldangle{\sankeygetnodeorient{\oldname}}
+    \IfBooleanTF{##1}{
+      % turn in reverse
+      \pgfmathsetmacro\orient{\oldangle-##4}
+      % \typeout{TURN: \oldangle=>\orient}
+      \ifnumgreater{##4}{0}{% anti-clockwise turn
+        \path let
+        \p1=(##3.left), \p2=(##3.right),
+        % center of rotation
+        \p{c}=($(\p1)!-\sankeyminradius!(\p2)$),
+        % starting position
+        \p{s}=(##3.center),
+        % ending position
+        \p{e}=($(\p{c})!1!-##4:(\p{s})$)
+        in \pgfextra{
+          \begin{pgfinterruptpath}
+            % \typeout{acw turn:\qty:\orient}
+            \def\pos{\p{e}}
+            \sankeymakenode{}
+            \sankeyarc{\name}{\oldname}
+          \end{pgfinterruptpath}
+        };
+      }{ % clockwise turn
+        \path let
+        \p1=(##3.right), \p2=(##3.left),
+        % center of rotation
+        \p{c}=($(\p1)!-\sankeyminradius!(\p2)$),
+        % starting position
+        \p{s}=(##3.center),
+        % ending position
+        \p{e}=($(\p{c})!1!-##4:(\p{s})$)
+        in \pgfextra{
+          % \typeout{cw turn:\qty:\orient}
+          \begin{pgfinterruptpath}
+            \def\pos{\p{e}}
+            \sankeymakenode{}
+            \sankeyarc{\name}{\oldname}
+          \end{pgfinterruptpath}
+        };
+      }
+    }{
+      % turn
+      \pgfmathsetmacro\orient{\oldangle+##4}
+      % \typeout{TURN: \oldangle=>\orient}
+      \ifnumgreater{##4}{0}{% anti-clockwise turn
+        \path let
+        \p1=(##3.left), \p2=(##3.right),
+        % center of rotation
+        \p{c}=($(\p1)!-\sankeyminradius!(\p2)$),
+        % starting position
+        \p{s}=(##3.center),
+        % ending position
+        \p{e}=($(\p{c})!1!##4:(\p{s})$)
+        in \pgfextra{
+          \begin{pgfinterruptpath}
+            % \typeout{acw turn:\qty:\orient}
+            \def\pos{\p{e}}
+            \sankeymakenode{}
+            \sankeyarc{\oldname}{\name}
+          \end{pgfinterruptpath}
+        };
+      }{ % clockwise turn
+        \path let
+        \p1=(##3.right), \p2=(##3.left),
+        % center of rotation
+        \p{c}=($(\p1)!-\sankeyminradius!(\p2)$),
+        % starting position
+        \p{s}=(##3.center),
+        % ending position
+        \p{e}=($(\p{c})!1!##4:(\p{s})$)
+        in \pgfextra{
+          % \typeout{cw turn:\qty:\orient}
+          \begin{pgfinterruptpath}
+            \def\pos{\p{e}}
+            \sankeymakenode{}
+            \sankeyarc{\oldname}{\name}
+          \end{pgfinterruptpath}
+        };
+      }
+    }
+    \endgroup
+  }
+
+  \NewDocumentCommand\sankeyfork{mm}{%name,list of forks
+    \def\listofforks{##2}
+    \xdef\sankeytot{0}
+    \xdef\sankeycalculus{0}
+    \pgfmathsetmacro\iqty{\sankeygetnodeqty{##1}}
+    \pgfmathsetmacro\iorient{\sankeygetnodeorient{##1}}
+    \pgfmathsetmacro\orient{\iorient}
+    %\typeout{iname:##1, iqty:\iqty,iorient:\iorient}
+    \foreach \qty/\name[count=\c] in \listofforks {
+      %\typeout{sankeyfork foreach: qty(\qty) name(\name) count(\c)}
+      \path
+      let
+      \p1=(##1.left),\p2=(##1.right),
+      \p{start}=($(\p1)!\fpeval{\sankeytot/\iqty}!(\p2)$),
+      \n{nexttot}={\fpeval{\sankeytot+\qty}},
+      \p{end}=($(\p1)!\fpeval{\n{nexttot}/\iqty}!(\p2)$),
+      \p{mid}=($(\p{start})!.5!(\p{end})$)
+      in \pgfextra{
+        %\typeout{new fork:\name}
+        %\typeout{qty:\qty,name:\name,count:\c,pos=\p{mid}}
+        \xdef\sankeytot{\n{nexttot}}
+        \xdef\sankeycalculus{\fpeval{\sankeycalculus+\qty}}
+        \begin{pgfinterruptpath}
+          \def\pos{\p{mid}}
+          \sankeymakenode{}
+        \end{pgfinterruptpath}
+      };
+    }
+    \edef\diff{\fpeval{abs(\iqty-\sankeytot)}}
+    %\typeout{sankeyfork diff: \diff}
+    %\pgfmathsetmacro{\diff}{abs(\iqty-\sankeytot)}
+    %\pgfmathtruncatemacro{\finish}{\diff<0.01?1:0}
+    \ifnumequal{\diff}{0}{}{
+      \PackageWarning{sankey}{^^J*** Warning: bad sankey fork: \iqty\space!=\space\sankeycalculus(=\sankeytot)^^J##2}
+    }
+  }
+  
+  \def\sankeyqtytolen##1{\fpeval{(##1)/\sankeytotalqty*\sankeytotallen}}
+  
+  \sankeyset{
+    % % default values,
+    % /tikz/declare function={
+    %   % sankeyqtytolen(\qty)=\qty/\sankeytotalqty*\sankeytotallen;
+    %   % sankeylentoqty(\len)=\len/\sankeytotallen*\sankeytotalqty;
+    % },%
+    default parameters,%
+    % user values
+    #1}
+
+  %\typeout{sankeytotallen: \sankeytotallen}
+  
+  #2 % body of sankeydiagram environment 
+}
+
+
+\sankeyset{
+  % none style
+  new start style={none}{}{},
+  new end style={none}{}{},
+  % simple style
+  new start style={simple}{
+    (\name.left) -- ([xshift=-.5\pgflinewidth]\name.left) -- ([xshift=-.5\pgflinewidth]\name.right) -- (\name.right) -- cycle
+  }{
+    (\name.left) -- ([xshift=-.5\pgflinewidth]\name.left) -- ([xshift=-.5\pgflinewidth]\name.right) -- (\name.right)
+  },
+  new end style={simple}{
+    (\name.left) -- ([xshift=2mm]\name.center) -- (\name.right) -- cycle
+  }{
+    (\name.left) -- ([xshift=2mm]\name.center) -- (\name.right)
+  },
+  % arrow style
+  new start style={arrow}{
+    (\name.left) -- ++(-10pt,0)
+    -- ([xshift=-10pt/6]\name.center)
+    -- ([xshift=-10pt]\name.right)
+    -- (\name.right) -- cycle
+  }{
+    (\name.left) -- ++(-10pt,0)
+    -- ([xshift=-10pt/6]\name.center)
+    -- ([xshift=-10pt]\name.right)
+    -- (\name.right)
+  },
+  new end style={arrow}{
+    (\name.left) -- ([yshift=1mm]\name.left)
+    -- ([xshift=10pt]\name.center)
+    -- ([yshift=-1mm]\name.right) -- (\name.right) -- cycle
+  }{
+    (\name.left) -- ([yshift=1mm]\name.left)
+    -- ([xshift=10pt]\name.center)
+    -- ([yshift=-1mm]\name.right) -- (\name.right)
+  },
+}
\ No newline at end of file
-- 
cgit v1.2.3

