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% \iffalse
% --------------------------------------------------------------------
%<*hex>
% \fi
% 
% \subsubsection{Extra graphics}
% \label{sec:impl:hex:extra}
%
% To make the interface a bit more flexible we allow for adding
% arbitrary stuff to the hexes.
%
% Some examples of \spec{pic}tures to add in the \spec{extra} stuff.
% 
% \begin{HexKey}{hex/fortress}
%
%   Draw a fortress. An example of a extra graphics entity. 
%
%    \begin{macrocode}
\tikzset{%
  hex/fortress/.pic={
    \path[draw,pic actions]
    (0:  .9) --
    (0:  .7) -- 
    (60: .7) -- ( 60:.9) -- ( 60:.7) --
    (120:.7) -- (120:.9) -- (120:.7) -- 
    (180:.7) -- (180:.9) -- (180:.7) -- 
    (240:.7) -- (240:.9) -- (240:.7) -- 
    (300:.7) -- (300:.9) -- (300:.7) -- 
    (0:  .7) -- cycle;}}
%    \end{macrocode}
% \end{HexKey}
%
% \begin{HexKey}{hex/fortress 2}
%
%   Draw a fortress. An example of a extra graphics entity. 
%
%    \begin{macrocode}
\tikzset{
  hex/fortress 2/.pic={%
    \draw[pic actions,transform shape] (0:0.64)
    foreach \a in {15,45,...,345}{
      --(\a:0.64)
      --(\a:0.80)
      --(\a+15:0.80)
      --(\a+15:0.64)}
    --cycle;
  },
}
%    \end{macrocode}
% \end{HexKey}
% 
% \iffalse
% --------------------------------------------------------------------
% \fi
% 
% \subsubsection{Some macros}
%
%
%    \begin{macrocode}
\DeclareRobustCommand\fortmark[1][scale=.25]{\tikz[#1,transform shape]{%
    \pic{hex/fortress 2}}}
\providecommand\terrainmark[2][scale=.2]{%
  \tikz[#1]{\hex[label=,terrain=#2]}}
\providecommand\clearhex[1][scale=.2]{\tikz[#1]{\hex[label=]}}
\providecommand\woodshex[1][scale=.2]{\terrainmark[#1]{woods}}
\providecommand\mountainhex[1][scale=.2]{\terrainmark[#1]{mountains}}
\providecommand\cityhex[1][scale=.2]{\terrainmark[#1]{city}}
\providecommand\beachhex[1][scale=.2]{\terrainmark[#1]{beach}}
\providecommand\seahex[1][scale=.2]{\tikz[#1]{\hex[label=,fill=sea]}}
\providecommand\riverhex[1][scale=.2]{%
  \tikz[#1]{%
    \hex[label=](c=0,r=0)%
    \river[](hex cs:e=SW)--(hex cs:e=NE);}}
\providecommand\roadhex[1][scale=.2]{%
  \tikz[#1]{%
    \hex[label=](c=0,r=0)%
    \road(hex cs:e=SW)--(hex cs:e=NE);}}
%    \end{macrocode}
%    
% \iffalse
%</hex>
% --------------------------------------------------------------------
% \fi