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% Copyright 2013 by Till Tantau
% Copyright 2018 by Kroum Tzanev
%
% 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.
\ProvidesFileRCS{tikzlibraryangles.code.tex}
\tikzset{
pics/angle/.style = {
setup code = \tikz@lib@angle@parse#1\pgf@stop,
background code = \tikz@lib@angle@background#1\pgf@stop,
foreground code = \tikz@lib@angle@foreground#1\pgf@stop,
},
pics/right angle/.style = {
setup code = \tikz@lib@angle@parse#1\pgf@stop,
background code = \tikz@lib@rightangle@background#1\pgf@stop,
foreground code = \tikz@lib@rightangle@foreground#1\pgf@stop,
},
pics/angle/.default=A--B--C,
angle eccentricity/.initial=.6,
angle radius/.initial=5mm,
}%
\def\tikz@lib@angle@background#1--#2--#3\pgf@stop{%
\path [name prefix ..] [pic actions, draw=none] (#2.center)
-- ++(\tikz@start@angle@temp:\tikz@lib@angle@rad pt)
arc [start angle=\tikz@start@angle@temp, end
angle=\tikz@end@angle@temp, radius=\tikz@lib@angle@rad pt] -- cycle;
}%
\def\tikz@lib@angle@foreground#1--#2--#3\pgf@stop{%
\path [name prefix ..] [pic actions, fill=none, shade=none]
([shift={(\tikz@start@angle@temp:\tikz@lib@angle@rad pt)}]#2.center)
arc [start angle=\tikz@start@angle@temp, end
angle=\tikz@end@angle@temp, radius=\tikz@lib@angle@rad pt];
\ifx\tikzpictext\relax\else%
\def\pgf@temp{\node()[name prefix
..,at={([shift={({.5*\tikz@start@angle@temp+.5*\tikz@end@angle@temp}:\pgfkeysvalueof{/tikz/angle
eccentricity}*\tikz@lib@angle@rad pt)}]#2.center)}]}
\expandafter\pgf@temp\expandafter[\tikzpictextoptions]{\tikzpictext};%
\fi
}%
\def\tikz@lib@rightangle@background#1--#2--#3\pgf@stop{%
\path [name prefix ..] [pic actions, draw=none] (#2.center)
-- ++(\tikz@start@angle@temp:\tikz@lib@angle@rad pt)
-- ++(\tikz@end@angle@temp:\tikz@lib@angle@rad pt)
-- ++(\tikz@start@angle@temp:-\tikz@lib@angle@rad pt)
-- cycle;
}%
\def\tikz@lib@rightangle@foreground#1--#2--#3\pgf@stop{%
\path [name prefix ..] [pic actions, fill=none, shade=none]
([shift={(\tikz@start@angle@temp:\tikz@lib@angle@rad pt)}]#2.center)
-- ++(\tikz@end@angle@temp:\tikz@lib@angle@rad pt)
-- ++(\tikz@start@angle@temp:-\tikz@lib@angle@rad pt);
\ifx\tikzpictext\relax\else%
\def\pgf@temp{\node()[name prefix
..,at={([shift={({.5*\tikz@start@angle@temp+.5*\tikz@end@angle@temp}:\pgfkeysvalueof{/tikz/angle
eccentricity}*1.4142136*\tikz@lib@angle@rad pt)}]#2.center)}]}
\expandafter\pgf@temp\expandafter[\tikzpictextoptions]{\tikzpictext};%
\fi
}%
\def\tikz@lib@angle@parse#1--#2--#3\pgf@stop{%
% Compute radius:
\pgfmathsetmacro\tikz@lib@angle@rad{\pgfkeysvalueof{/tikz/angle radius}}
\ifdim\tikz@lib@angle@rad pt>0pt\else\def\tikz@lib@angle@rad{12}\fi%
% Compute first coordinate:
\pgf@process{\pgfpointanchor{#2}{center}}%
\pgf@xa=\pgf@x%
\pgf@ya=\pgf@y%
\pgf@process{\pgfpointanchor{#1}{center}}%
\pgf@xb=\pgf@x%
\pgf@yb=\pgf@y%
\pgf@process{\pgfpointanchor{#3}{center}}%
\pgf@xc=\pgf@x%
\pgf@yc=\pgf@y%
\advance\pgf@xb by-\pgf@xa%
\advance\pgf@yb by-\pgf@ya%
\advance\pgf@xc by-\pgf@xa%
\advance\pgf@yc by-\pgf@ya%
\pgfmathsetmacro{\tikz@start@angle@temp}{atan2(\the\pgf@yb,\the\pgf@xb)}
\pgfmathsetmacro{\tikz@end@angle@temp}{atan2(\the\pgf@yc,\the\pgf@xc)}
\ifdim\tikz@end@angle@temp pt<\tikz@start@angle@temp pt%
\pgfmathsetmacro{\tikz@start@angle@temp}{\tikz@start@angle@temp-360}%
\fi%
}%
\endinput
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