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%--------------------------------------------
%
% Package pgfplots
%
% Provides a user-friendly interface to create function plots (normal
% plots, semi-logplots and double-logplots).
%
% It is based on Till Tantau's PGF package.
%
% Copyright 2013 by Christian Feuersaenger
%
% This program is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program. If not, see <http://www.gnu.org/licenses/>.
%
%--------------------------------------------
% This library adds support for high-level instructions for "fill area
% between two arbitrary plots of functions".
%
% It activates the syntax
%
% \addplot fill between[of=A and B];
%
% where A and B are two plots named by 'name path='.
%
% In fact, this here is not much more than a low-level invocation of
% \pgfpathfillbetween
% and a couple of styles. It could become a TikZ library because it
% actually works on any two named paths, but it has its restrictions
% regarding the supported input paths: both need to be plots of
% functions (non-intersecting, should have at most one function value
% for each canvas X coord)
\pgfutil@IfUndefined{pgfplotsset}{%
\pgferror{Please load pgfplots before pgfplots.fillbetween.}%
\endinput
}{}%
\usetikzlibrary{fillbetween}
\usepgfplotslibrary{decorations.softclip}
\pgfkeys{
/pgfplots/every fill between plot/.style={/pgfplots/area legend,/tikz/fill},
/tikz/soft clip assign/domain/.code args={#1:#2}{%
\edef\pgfplots@loc@TMPa{(axis cs:#1,\pgfkeysvalueof{/pgfplots/ymin}) rectangle (axis cs:#2,\pgfkeysvalueof{/pgfplots/ymax})}%
\pgfkeysalso{/tikz/soft clip assign/path/.expand once=\pgfplots@loc@TMPa}%
},%
/tikz/soft clip assign/y domain y/.style={/tikz/soft clip assign/domain y={#1}},
/tikz/soft clip assign/domain y/.code args={#1:#2}{%
\edef\pgfplots@loc@TMPa{(axis cs:\pgfkeysvalueof{/pgfplots/xmin},#1) rectangle (axis cs:\pgfkeysvalueof{/pgfplots/xmax},#2)}%
\pgfkeysalso{/tikz/soft clip assign/path/.expand once=\pgfplots@loc@TMPa}%
},%
%
/pgfplots/execute at begin axis@@/.add={}{%
\gdef\pgfplotsfillbetween@list@of@layers@with@clippath{}%
\gdef\b@pgfplotsfillbetween@list@has@set@layers{0}%
},
}
\def\pgfplotsfillbetween@ensure@clipping@on@layer{%
\ifpgfplots@clip
\pgfkeysgetvalue{/tikz/fill between/on layer}\pgfplots@loc@TMPa
\edef\pgfplots@loc@TMPa{\pgfplots@loc@TMPa}%
%
% check if 'pre main,' is inside of the already prepared layers:
\def\pgfplots@loc@TMPb{\expandafter\pgfutil@in@\expandafter{\pgfplots@loc@TMPa,}}%
\expandafter\pgfplots@loc@TMPb\expandafter{\pgfplotsfillbetween@list@of@layers@with@clippath}%
%
\ifpgfutil@in@
% ah - already prepared. Good, nothing left to do.
\else
\pgfplots@log3{fill between: found 'clip=true'. installing clip path for layer '\pgfplots@loc@TMPa'...}%
\xdef\pgfplotsfillbetween@list@of@layers@with@clippath{\pgfplots@loc@TMPa,\pgfplotsfillbetween@list@of@layers@with@clippath}%
%
\edef\pgfplots@loc@TMPb{%
\noexpand\pgfplotsextra{%
\noexpand\pgfplotsonlayer{\pgfplots@loc@TMPa}%
\noexpand\pgfplotspathaxisoutline
\noexpand\pgfusepath{clip}%
\noexpand\endpgfplotsonlayer
}%
}%
\pgfplots@loc@TMPb
%
\fi
\fi
}%
% The options are from
% \addplot[#1] fill between[#2] #3;
%
% This method is invoked from the global \addplot dispatching.
\def\pgfplotslibraryfillbetween@addplot#1#2#3{%
%
\pgfplots@start@plot@with@behavioroptions{/pgfplots/every fill between plot,#1}%
%
\pgfkeysvalueof{/pgfplots/execute at end survey}%
\pgfplots@remember@survey@option@list
%
%
\pgfplotslibraryfillbetweenpreparecurrentlayer
%
\pgfplots@addplot@enqueue@coords{%
% precmd
}{%
% empty - this here is a TikZ instruction, not a "real" \addplot command
}{%
% the path instruction:
\tikzfillbetween[#2]{%
/pgfplots/.search also=/tikz,%
/pgfplots/.cd,%
#1%
}%
}{%
% post command.
}%
}
% SIDE-EFFECT: modifies \b@pgfplotsfillbetween@list@has@set@layers and
% \pgfplotsfillbetween@list@of@layers@with@clippath
\def\pgfplotslibraryfillbetweenpreparecurrentlayer{%
\pgfkeysgetvalue{/tikz/fill between/on layer}\pgfplots@loc@TMPa
\ifx\pgfplots@loc@TMPa\pgfutil@empty
\else
\if0\b@pgfplotsfillbetween@list@has@set@layers
\pgfplots@log3{fill between: activating layered graphics}%
\pgfplotssetlateoptions{set layers}%
\gdef\b@pgfplotsfillbetween@list@has@set@layers{1}%
\fi
\pgfplotsfillbetween@ensure@clipping@on@layer
\fi
}
\def\pgfplots@tikzfillbetween{\pgfutil@ifnextchar[{\pgfplots@tikzfillbetween@opt}{\pgfplots@tikzfillbetween@opt[]}}
\def\pgfplots@tikzfillbetween@opt[#1]#2{%
\pgfplots@addplot@enqueue@coords{%
% precmd
}{%
% empty - this here is a TikZ instruction, not a "real" \addplot command
}{%
% the path instruction:
\tikzfillbetween[#1]{#2}%
}{%
% post command.
}%
}%
\expandafter\def\expandafter\pgfplots@replace@path@commands\expandafter{\pgfplots@replace@path@commands
\let\pgfplots@orig@tikzfillbetween=\tikzfillbetween
\let\tikzfillbetween=\pgfplots@tikzfillbetween
}%
\expandafter\def\expandafter\pgfplots@restore@path@commands\expandafter{\pgfplots@restore@path@commands
\let\tikzfillbetween=\pgfplots@orig@tikzfillbetween
}
\endinput
|
