%% symbol library for TikZ track schematics
%
% Copyright (c) 2018 - 2022, Martin Scheidt (ISC license)
%
% Permission to use, copy, modify, and/or distribute this file for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
%
\ProvidesFileRCS{tikzlibrarytrackschematic.vehicles.code.tex}%
%
%%%%%%%%%%%%%%%
% Requirements
%%%%%%%%%%%%%%%
\RequirePackage{tikz,etoolbox}%
\usetikzlibrary{calc}%
%
\ifdeflength{\objectlength}{}{% Not defined, so define it!
  \newlength{\objectlength}%
}%
\setlength{\objectlength}{4cm}%
%
%%%%%%%%%%%%%%%
% tikz keys for multiple use
%%%%%%%%%%%%%%%
\pgfkeys{%
  /tikz/trackschematic/.is family,%
  /tikz/trackschematic/.cd,%
  %% color foreground
  foreground/.store in=\foreground,%
  foreground=black,% DEFAULT
  /tikz/foreground/.forward to=/tikz/trackschematic/foreground,%
  %% color background
  background/.store in=\background,%
  background=white,% DEFAULT
  /tikz/background/.forward to=/tikz/trackschematic/background,%
  %% face
  face/.value required,% forward OR backward
  face/.store in=\face,%
  /tikz/face/.forward to=/tikz/trackschematic/face,%
  /tikz/forward/.code={\pgfkeys{/tikz/trackschematic/face=forward}},%
  /tikz/backward/.code={\pgfkeys{/tikz/trackschematic/face=backward}},%
  /tikz/bidirectional/.code={\pgfkeys{/tikz/trackschematic/face=bidirectional}},%
  %% operation
  operation mode/.store in=\operationmode,% manual, automatic OR undefined
  operation mode=none,% DEFAULT
  /tikz/operation/.forward to=/tikz/trackschematic/operation mode,%
  %% length
  length/.store in=\objectlength,% default length 4cm
  /tikz/length/.forward to=/tikz/trackschematic/length,%
  %% label
  shift label/.store in=\labelcoord,% (coord)
  shift label=(none),% DEFAULT
  /tikz/shift label/.forward to=/tikz/trackschematic/shift label,%
}%
%
%%%%%%%%%%%%%%%
% commands
%%%%%%%%%%%%%%%
%
%% command: parked vehicles
\newcommand\parkedvehicles{}% just for safety
\def\parkedvehicles[#1]#2(#3)#4(#5){% \parkedvehicles[options] at (coord) label (name);
  \pic[parked,operation=undefined,forward,#1] at (#3) {vehicles={#2/#4/#5}}% symbol
}%
%% command: shunting movements
\newcommand\shunting{}% just for safety
\def\shunting[#1]#2(#3)#4(#5){% \shunting[options] at (coord) label (name);
  \pic[shunting mode,operation=undefined,#1] at (#3) {vehicles={#2/#4/#5}}% symbol
}%
%% command: train run
\newcommand\train{}% just for safety
\def\train[#1]#2(#3)#4(#5){% \train[options] at (coord) label (name);
  \pic[train mode,operation=undefined,#1] at (#3) {vehicles={#2/#4/#5}}% symbol
}%
%
%%%%%%%%%%%%%%%
% tikz keys
%%%%%%%%%%%%%%%
\pgfkeys{%
  /tikz/trackschematic/vehicles/.is family,%
  /tikz/trackschematic/vehicles/.cd,%
  %% parked vehicles
  parked/.value forbidden,%
  parked/.code={\settoggle{is_parked}{true}},%
  /tikz/parked/.forward to=/tikz/trackschematic/vehicles/parked,%
  %% shunting mode
  shunting mode/.value forbidden,%
  shunting mode/.code={\settoggle{in_shunting_mode}{true}},%
  /tikz/shunting mode/.forward to=/tikz/trackschematic/vehicles/shunting mode,%
  %% shunting movement
  movement/.value forbidden,%
  movement/.code={\settoggle{is_shunting}{true}},%
  /tikz/movement/.forward to=/tikz/trackschematic/vehicles/movement,%
  %% train mode
  train mode/.value forbidden,%
  train mode/.code={\settoggle{in_train_mode}{true}},%
  /tikz/train mode/.forward to=/tikz/trackschematic/vehicles/train mode,%
  %% ghost train
  ghost train/.value forbidden,%
  ghost train/.code={\settoggle{train_is_a_ghost}{true}},%
  /tikz/ghost/.forward to=/tikz/trackschematic/vehicles/ghost train,%
  %% train run
  run/.store in=\trainrun,% slow, normal, fast OR none
  run=none,% DEFAULT
  /tikz/run/.forward to=/tikz/trackschematic/vehicles/run,%
  %% label
  label align/.store in=\labelalign,% left, right OR center
  label align=center,% DEFAULT
  /tikz/label align/.forward to=/tikz/trackschematic/vehicles/label align,%
  %% train bend
  bend right at/.store in=\bendrightcoord,% (coord)
  bend right at=(none),% DEFAULT
  /tikz/bend right at/.forward to=/tikz/trackschematic/vehicles/bend right at,%
  bend left at/.store in=\bendleftcoord,% (coord)
  bend left at=(none),% DEFAULT
  /tikz/bend left at/.forward to=/tikz/trackschematic/vehicles/bend left at,%
}%
% options
\newtoggle{is_parked}\settoggle{is_parked}{false}%
\newtoggle{in_shunting_mode}\settoggle{in_shunting_mode}{false}%
\newtoggle{is_shunting}\settoggle{is_shunting}{false}%
\newtoggle{in_train_mode}\settoggle{in_train_mode}{false}%
\newtoggle{train_is_a_ghost}\settoggle{train_is_a_ghost}{false}%
\newtoggle{single_bend}\settoggle{single_bend}{false}%
\newtoggle{double_bend}\settoggle{double_bend}{false}%
%
%%%%%%%%%%%%%%%
% symbol definition
%%%%%%%%%%%%%%%
%
\tikzset{%
  pics/vehicles/.default=,%
  pics/vehicles/.style args={#1/#2/#3}{code={%
    %%
    %%%%%%%[steps]%%%%%%
    %%
    %% 0. setup settings
    %% 1. calculate coordinates
    %% - calculation of vehicle coordinates:
    %%
    %%                rear bend   front bend
    %%                (ts-b-r1)   (ts-b-f1)
    %%   (ts-v-r1)•__________•_______•__________•(ts-v-f1)
    %%            |                              \
    %%            |         label•(ts-v-l)        •(ts-v-f) front tip
    %%            |__________ _______ __________ /
    %%   (ts-v-r2)•          •       •          •(ts-v-f2)
    %%                (ts-b-r2)   (ts-b-f2)
    %%
    %% - the base coord is depend on usage
    %%      for parked: (ts-v-l)
    %%            else: (ts-v-f)
    %%
    %% 2. set style for line and background
    %% 3. draw arrows for speed indication
    %% 4. draw vehicle shape
    %% 5. draw operation mode
    %% 6. draw label
    %%
    %%%%%%%%%%%%%%%%%%%%
    %% 0. settings
    \def\coordcommand{#1}% beware of leading and tailing spaces!
    \def\labelcommand{#2}% beware of leading and tailing spaces!
    \def\labelcontent{#3}%
    %% face setup
    \ifdefstring{\face}{forward}{% face
      \pgfmathsetmacro{\facefactor}{1}%
    }{%
      \ifdefstring{\face}{backward}{% face
        \pgfmathsetmacro{\facefactor}{-1}%
      }{% error message
        \pgfkeys{/errors/unknown choice value={/tikz/trackschematic/face}{“forward“ OR “backward“ as key required}}%
      }%
    }% end \ifdefstring{\face}
    %% bend setup
    % determine number of bends and find front and rear bend from left to right
    \ifdefstring{\bendleftcoord}{(none)}{}{% NOT default
      \settoggle{single_bend}{true}%
      \path \bendleftcoord;\pgfgetlastxy{\bendX}{\bendY}% absolut coord
      \pgfmathsetmacro\bendfactor{1}%
    }%
    \ifdefstring{\bendrightcoord}{(none)}{}{% NOT default
      \iftoggle{single_bend}{%
        \settoggle{double_bend}{true}%
        \settoggle{single_bend}{false}%
        \path \bendrightcoord;\pgfgetlastxy{\bendrightX}{\bendrightY}
        \ifdimcomp{\bendrightX}{>}{\bendX}{% which one comes first?
          \ifdefstring{\face}{forward}{%
            \pgfmathsetmacro\frontBendfactor{1}%
            \pgfmathsetmacro\rearBendfactor{-1}%
            \pgfmathsetlengthmacro\frontBendX{\bendrightX}%
            \pgfmathsetlengthmacro\rearBendX{\bendX}%
            \pgfmathsetlengthmacro\rearBendY{\bendY}%
          }{% face backward
            \pgfmathsetmacro\frontBendfactor{-1}%
            \pgfmathsetmacro\rearBendfactor{1}%
            \pgfmathsetlengthmacro\frontBendX{\bendX}%
            \pgfmathsetlengthmacro\rearBendX{\bendrightX}%
            \pgfmathsetlengthmacro\rearBendY{\bendrightY}%
          }%
        }{% {\bendrightX}{<}{\bendleftX}%
          \ifdefstring{\face}{forward}{%
            \pgfmathsetmacro\frontBendfactor{-1}%
            \pgfmathsetmacro\rearBendfactor{1}%
            \pgfmathsetlengthmacro\frontBendX{\bendX}%
            \pgfmathsetlengthmacro\rearBendX{\bendrightX}%
            \pgfmathsetlengthmacro\rearBendY{\bendrightY}%
          }{% face backward
            \pgfmathsetmacro\frontBendfactor{1}%
            \pgfmathsetmacro\rearBendfactor{-1}%
            \pgfmathsetlengthmacro\frontBendX{\bendrightX}%
            \pgfmathsetlengthmacro\rearBendX{\bendX}%
            \pgfmathsetlengthmacro\rearBendY{\bendY}%
          }%
        }%
      }{% NOT double bend
        \settoggle{single_bend}{true}%
        \path \bendrightcoord;\pgfgetlastxy{\bendX}{\bendY}% absolut coord
        \pgfmathsetmacro\bendfactor{-1}%
      }%
    }%
    %%%%%%%%%%%%%%%%%%%%
    %% 1. coordinate calculations
    %% basic coords for corners
    \iftoggle{is_parked}{%
      \coordinate (ts-v-f1) at ($ 0.5*(\objectlength,0) + (0, 0.3)$);%
      \coordinate (ts-v-f2) at ($ 0.5*(\objectlength,0) + (0,-0.3)$);%
      \coordinate (ts-v-r1) at ($-0.5*(\objectlength,0) + (0, 0.3)$);%
      \coordinate (ts-v-r2) at ($-0.5*(\objectlength,0) + (0,-0.3)$);%
    }{%
      \coordinate (ts-v-f1) at ($\facefactor*(-0.3,0) + (0, 0.3)$);%
      \coordinate (ts-v-f2) at ($\facefactor*(-0.3,0) + (0,-0.3)$);%
      \coordinate (ts-v-r1) at ($\facefactor*(-\objectlength,0) + (0, 0.3)$);%
      \coordinate (ts-v-r2) at ($\facefactor*(-\objectlength,0) + (0,-0.3)$);%
    }%
    %% front tip for traveling direction
    \iftoggle{is_parked}{%
      \coordinate (ts-v-f) at ($ 0.5*(\objectlength,0) + (0, 0  )$);%
    }{%
      \coordinate (ts-v-f) at (0,0);%
    }%
    %% bend - DEFAULT: no bend
    \coordinate (ts-b-f1) at (ts-v-f1);%
    \coordinate (ts-b-f2) at (ts-v-f2);%
    \coordinate (ts-b-r1) at (ts-v-r1);%
    \coordinate (ts-b-r2) at (ts-v-r2);%
    %
    \iftoggle{single_bend}{%
      % \bendX is a absolut coordinate
      % make them relative to  base
      \path (0,0);\pgfgetlastxy{\baseX}{\baseY}% absolut coord
      % calc bend position
      \coordinate (ts-b-r1) at ($(-\baseX,0) + (\bendX, 0.3) + \facefactor*\bendfactor*( 0.1,0)$);%
      \coordinate (ts-b-r2) at ($(-\baseX,0) + (\bendX,-0.3) + \facefactor*\bendfactor*(-0.1,0)$);%
      % calc length from bend to end with factor ~0.7071 at 45 degree to a projected length
      \pgfmathsetlengthmacro\bendlength{(\facefactor*\objectlength - \baseX + \bendX)*0.7071}%
      \coordinate (ts-v-r1) at ($(ts-b-r1) + (-\bendlength,0) + \facefactor*\bendfactor*( 0.1,\bendlength) + (0,-0.1)$);%
      \coordinate (ts-v-r2) at ($(ts-b-r2) + (-\bendlength,0) + \facefactor*\bendfactor*(-0.1,\bendlength) + (0, 0.1)$);%
    }{}%
    \iftoggle{double_bend}{%
      % \bendX and \bendY are absolut coords
      % make them relative to  base
      \path (0,0);\pgfgetlastxy{\baseX}{\baseY}% absolut coord
      % calc bend position
      \coordinate (ts-b-f1) at ($(-\baseX,0) + (\frontBendX, 0.3) + \facefactor*\frontBendfactor*(-0.1,0)$);%
      \coordinate (ts-b-f2) at ($(-\baseX,0) + (\frontBendX,-0.3) + \facefactor*\frontBendfactor*( 0.1,0)$);%
      \coordinate (ts-b-r1) at ($(-\baseX,0) + (\rearBendX, 0.3) + (0,-\baseY) + (0,\rearBendY) + \facefactor*\rearBendfactor*( 0.1,0)$);%
      \coordinate (ts-b-r2) at ($(-\baseX,0) + (\rearBendX,-0.3) + (0,-\baseY) + (0,\rearBendY) + \facefactor*\rearBendfactor*(-0.1,0)$);%
      % calc length from bend to end with factor ~1.4142 at 45 degree to a projected length
      \pgfmathsetlengthmacro\bendlength{\facefactor*\objectlength - (\frontBendX - \rearBendX)*1.4142 - (\baseX - \frontBendX)}%
      \coordinate (ts-v-r1) at ($(ts-b-r1) + (-\bendlength,0) + \facefactor*\rearBendfactor*(-0.1,0)$);%
      \coordinate (ts-v-r2) at ($(ts-b-r2) + (-\bendlength,0) + \facefactor*\rearBendfactor*( 0.1,0)$);%
    }{}%
    %%
    %%%%%%%%%%%%%%%%%%%%
    %% 2. vehicle style
    \iftoggle{in_train_mode}{% train mode
      \iftoggle{train_is_a_ghost}{% ghost train
        \tikzset{every path/.style={draw=\foreground, line width=0.8pt, dashed}};%
      }{% normal train
        \tikzset{every path/.style={draw=\foreground, line width=1pt, fill=\background}};%
      }%
    }{% shunting mode
      \tikzset{every path/.style={draw=\foreground, double, double distance=0.5mm, line width=0.3pt, fill=\background}};%
    }%
    %%
    %%%%%%%%%%%%%%%%%%%%
    %% 3. arrow shapes
    %% (order before vehicle shape due to background fill!)
    \iftoggle{is_shunting}{% arrow for shunting
      \iftoggle{in_shunting_mode}{% shunting mode
        \fill[draw=none,fill=\background] ($\facefactor*(-0.3, 0.3)$) --%
                                          ($\facefactor*(-0.1, 0.3)$) --%
                                          ($\facefactor*( 0.2, 0  )$) --%
                                          ($\facefactor*(-0.1,-0.3)$) --%
                                          ($\facefactor*(-0.3,-0.3)$) -- cycle;% \background fill
        \path[line cap=rect,fill=none] ($\facefactor*(-0.1, 0.3)$) --%
                                       ($\facefactor*( 0.2, 0  )$) --%
                                       ($\facefactor*(-0.1,-0.3)$);% arrow shape
      }{% train mode
        \pgfkeys{/errors/unknown choice value={/tikz/trackschematic/vehicle/movement}{movement can only be combined with shunting}}%
      }%
    }{}% end \iftoggle{shunting_movement}
    \ifdefstring{\trainrun}{none}{}{% DEFAULT no arrow for train
      \iftoggle{in_train_mode}{% train mode
        \ifdefstring{\trainrun}{slow}{%
          \fill[draw=none,fill=\background] ($\facefactor*(-0.3, 0.3)$) --%
                                            ($\facefactor*(-0.1, 0.3)$) --%
                                            ($\facefactor*( 0.2, 0  )$) --%
                                            ($\facefactor*(-0.1,-0.3)$) --%
                                            ($\facefactor*(-0.3,-0.3)$) -- cycle;% \background fill
          \path[fill=none] ($\facefactor*(-0.15, 0.3)$) --%
                           ($\facefactor*(-0.1 , 0.3)$) --%
                           ($\facefactor*( 0.2 , 0  )$) --%
                           ($\facefactor*(-0.1 ,-0.3)$) --%
                           ($\facefactor*(-0.15,-0.3)$);% arrow shape
        }{%
          \ifdefstring{\trainrun}{normal}{%
            \fill[draw=none,fill=\background] ($\facefactor*(-0.3, 0.3)$) --%
                                              ($\facefactor*( 0.1, 0.3)$) --%
                                              ($\facefactor*( 0.4, 0  )$) --%
                                              ($\facefactor*( 0.1,-0.3)$) --%
                                              ($\facefactor*(-0.3,-0.3)$) -- cycle;% \background fill
            \path[fill=none] ($\facefactor*(-0.15, 0.3)$) --%
                             ($\facefactor*(-0.1 , 0.3)$) --%
                             ($\facefactor*( 0.2 , 0  )$) --%
                             ($\facefactor*(-0.1 ,-0.3)$) --%
                             ($\facefactor*(-0.15,-0.3)$);% arrow shape part 1
            \path[fill=none] ($\facefactor*( 0.05, 0.3)$) --%
                             ($\facefactor*( 0.1 , 0.3)$) --%
                             ($\facefactor*( 0.4 , 0  )$) --%
                             ($\facefactor*( 0.1 ,-0.3)$) --%
                             ($\facefactor*( 0.05,-0.3)$);% arrow shape part 2
            %
          }{%
            \ifdefstring{\trainrun}{fast}{%
              \fill[draw=none,fill=\background] ($\facefactor*(-0.3, 0.3)$) --%
                                                ($\facefactor*( 0.3, 0.3)$) --%
                                                ($\facefactor*( 0.6, 0  )$) --%
                                                ($\facefactor*( 0.3,-0.3)$) --%
                                                ($\facefactor*(-0.3,-0.3)$) -- cycle;% \background fill
              \path[fill=none] ($\facefactor*(-0.15, 0.3)$) --%
                               ($\facefactor*(-0.1 , 0.3)$) --%
                               ($\facefactor*( 0.2 , 0  )$) --%
                               ($\facefactor*(-0.1 ,-0.3)$) --%
                               ($\facefactor*(-0.15,-0.3)$);% arrow shape part 1
              \path[fill=none] ($\facefactor*( 0.05, 0.3)$) --%
                               ($\facefactor*( 0.1 , 0.3)$) --%
                               ($\facefactor*( 0.4 , 0  )$) --%
                               ($\facefactor*( 0.1 ,-0.3)$) --%
                               ($\facefactor*( 0.05,-0.3)$);% arrow shape part 2
              \path[fill=none] ($\facefactor*( 0.25, 0.3)$) --%
                               ($\facefactor*( 0.3 , 0.3)$) --%
                               ($\facefactor*( 0.6 , 0  )$) --%
                               ($\facefactor*( 0.3 ,-0.3)$) --%
                               ($\facefactor*( 0.25,-0.3)$);% arrow shape part 3
              %
            }{%error message
              \pgfkeys{/errors/unknown choice value={/tikz/trackschematic/vehicles/run}{“normal“, “slow“, “fast“ OR “none“ as key required}}%
            }%
          }%
        }%
      }{% shunting mode
        \pgfkeys{/errors/unknown choice value={/tikz/trackschematic/vehicle/run}{run can only be combined with train}}%
      }% end \iftoggle{in_train_mode}
    }% end \ifdefstring{\trainrun}{none} % end arrow shapes
    %%
    %%%%%%%%%%%%%%%%%%%%
    %% 4. vehicle shape
    \path (ts-v-f)%
      -- (ts-v-f1) -- (ts-b-f1) -- (ts-b-r1) -- (ts-v-r1)%
      -- (ts-v-r2) -- (ts-b-r2) -- (ts-b-f2) -- (ts-v-f2)%
      -- cycle;% vehicle shape
    %%
    %%%%%%%%%%%%%%%%%%%%
    %% 5. operation mode
    \iftoggle{is_parked}{}{% vehicle NOT parked
      \ifdefstring{\operationmode}{manual}{%
        \path[draw=none, fill=\foreground] ($\facefactor*(-0.4,0)$) circle (0.15);% dot
        \coordinate (ts-v-l) at ($(ts-v-l) + \facefactor*(-0.25,0)$);%
      }{
        \ifdefstring{\operationmode}{automatic}{%
          \path[draw=none, fill=\foreground] ($\facefactor*(-0.15,0)$) -- ++($\facefactor*(-0.15,0) +(0,0.15)$) -- ++(0,-0.3) -- cycle;% triangle
          \coordinate (ts-v-l) at ($(ts-v-l) + \facefactor*(-0.15,0)$);%
        }{%
          \ifdefstring{\operationmode}{undefined}{}{%
            \pgfkeys{/errors/unknown choice value={/tikz/trackschematic/operation}{“manual“, “automatic“ OR “undefined“ as key required}}%
          }%
        }% end automatically_operated
      }% end manually_operated
    }%
    %%
    %%%%%%%%%%%%%%%%%%%%
    %% 6. label
    \iftoggle{is_parked}{%
      \coordinate (ts-v-l)  at (0,0);% DEFAULT center
    }{%
      \coordinate (ts-v-l) at ($\facefactor*-0.5*(\objectlength,0)$);% DEFAULT center
    }%
    \iftoggle{train_is_a_ghost}{% ghost train
      \coordinate (ts-v-l) at ($(ts-v-l) + (0,0.16)$);%
    }{}%
    \ifdefstring{\labelcoord}{(none)}{}{% initialize if NOT default
      \path let \p1=\labelcoord in coordinate (ts-v-l) at ($(ts-v-l)+(\x1,\y1)$);%
    }%
    \ifdefstring{\labelcontent}{}{}{% label NOT empty
      \ifdefstring{\labelalign}{center}{% DEFAULT label align center
        \def\labelanchor{center}
      }{% label align NOT default
        \ifdefstring{\labelalign}{left}{% label align left
          \def\labelanchor{east}
        }{%
          \ifdefstring{\labelalign}{right}{% label align left
            \def\labelanchor{west}
          }{% NOT center, left, or right
            \pgfkeys{/errors/unknown choice value={/tikz/trackschematic/label align}{“center“, “left“ OR “right“ as key required}}%
          }% \ifdefstring{\labelalign}{right}
        }% \ifdefstring{\labelalign}{left}
      }% \ifdefstring{\labelalign}{center}
      \node[text=\foreground,anchor=\labelanchor,align=\labelalign] at (ts-v-l) {\footnotesize \labelcontent};% label
    }%
  }},% END pics/vehicles/.style args={#1/#2/#3}
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % symbology entry
  symbology_parked_vehicles/.pic = {%
    \secondarytrack (0,0) -- (6,0);%
    \parkedvehicles[] at (3,0) label ();%
  },%
  % symbology entry
  symbology_train_shunt_mode/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \shunting[forward] at (5,0) label ();%
  },%
  % symbology entry
  symbology_train_shunting/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \shunting[movement,forward] at (5,0) label ();%
  },%
  % symbology entry
  symbology_train/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \train[forward] at (5,0) label ();%
  },%
  % symbology entry
  symbology_train_moving_slow/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \train[run=slow,forward] at (5,0) label ();%
  },%
  % symbology entry
  symbology_train_moving/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \train[run=normal,forward] at (5,0) label ();%
  },%
  % symbology entry
  symbology_train_moving_fast/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \train[run=fast,forward] at (5,0) label ();%
  },%
  % symbology entry
  symbology_train_ghost/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \train[ghost,forward] at (5,0) label ();%
  },%
  % symbology entry
  symbology_train_drive_automatic/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \train[operation=automatic,forward] at (5,0) label ();%
  },%
  % symbology entry
  symbology_train_drive_human/.pic = {%
    \maintrack (0,0) -- (6,0);%
    \train[operation=manual,forward] at (5,0) label ();%
  },%
}%
%
%%%%%%%%%%%%%%%
\endinput%
%