| Current File : //usr/share/texlive/texmf-dist/tex/generic/pgf/libraries/shapes/pgflibraryshapes.misc.code.tex |
% Copyright 2018 by Till Tantau
%
% 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{pgflibraryshapes.misc.code.tex}
\pgfdeclareshape{cross out}
{%
\inheritsavedanchors[from=rectangle]% % this is nearly a rectangle
\inheritanchorborder[from=rectangle]%
\inheritanchor[from=rectangle]{north}%
\inheritanchor[from=rectangle]{north west}%
\inheritanchor[from=rectangle]{north east}%
\inheritanchor[from=rectangle]{center}%
\inheritanchor[from=rectangle]{west}%
\inheritanchor[from=rectangle]{east}%
\inheritanchor[from=rectangle]{mid}%
\inheritanchor[from=rectangle]{mid west}%
\inheritanchor[from=rectangle]{mid east}%
\inheritanchor[from=rectangle]{base}%
\inheritanchor[from=rectangle]{base west}%
\inheritanchor[from=rectangle]{base east}%
\inheritanchor[from=rectangle]{south}%
\inheritanchor[from=rectangle]{south west}%
\inheritanchor[from=rectangle]{south east}%
\foregroundpath{
% store lower right in xa/ya and upper right in xb/yb
\southwest \pgf@xa=\pgf@x \pgf@ya=\pgf@y
\northeast \pgf@xb=\pgf@x \pgf@yb=\pgf@y
\pgfpathmoveto{\pgfqpoint{\pgf@xa}{\pgf@ya}}
\pgfpathlineto{\pgfqpoint{\pgf@xb}{\pgf@yb}}
\pgfpathmoveto{\pgfqpoint{\pgf@xa}{\pgf@yb}}
\pgfpathlineto{\pgfqpoint{\pgf@xb}{\pgf@ya}}
\pgfsetarrowsstart{}
\pgfsetarrowsend{}
}%
}%
\pgfdeclareshape{strike out}
{%
\inheritsavedanchors[from=rectangle]% % this is nearly a rectangle
\inheritanchorborder[from=rectangle]%
\inheritanchor[from=rectangle]{north}%
\inheritanchor[from=rectangle]{north west}%
\inheritanchor[from=rectangle]{north east}%
\inheritanchor[from=rectangle]{center}%
\inheritanchor[from=rectangle]{west}%
\inheritanchor[from=rectangle]{east}%
\inheritanchor[from=rectangle]{mid}%
\inheritanchor[from=rectangle]{mid west}%
\inheritanchor[from=rectangle]{mid east}%
\inheritanchor[from=rectangle]{base}%
\inheritanchor[from=rectangle]{base west}%
\inheritanchor[from=rectangle]{base east}%
\inheritanchor[from=rectangle]{south}%
\inheritanchor[from=rectangle]{south west}%
\inheritanchor[from=rectangle]{south east}%
\foregroundpath{
\pgfpathmoveto{\southwest}
\pgfpathlineto{\northeast}
\pgfsetarrowsstart{}
\pgfsetarrowsend{}
}%
}%
% Rounded rectangle
\pgfkeys{/pgf/.cd,
rounded rectangle west arc/.initial=convex,
rounded rectangle east arc/.initial=convex,
rounded rectangle left arc/.style={/pgf/rounded rectangle west arc=#1},%
rounded rectangle right arc/.style={/pgf/rounded rectangle east arc=#1},%
rounded rectangle arc length/.initial=180%
}%
\def\pgf@lib@sh@misc@rr@text@concave{concave}%
\def\pgf@lib@sh@misc@rr@text@convex{convex}%
\pgfdeclareshape{rounded rectangle}{%
\savedmacro\westarc{%
\edef\westarc{\pgfkeysvalueof{/pgf/rounded rectangle west arc}}%
}%
\savedmacro\eastarc{%
\edef\eastarc{\pgfkeysvalueof{/pgf/rounded rectangle east arc}}%
}%
\savedmacro\roundedrectanglepoints{%
%
% Get half the arc angle, a.
%
\pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/rounded rectangle arc length}}%
\pgf@x=.5\pgf@x%
\edef\halfarcangle{\pgfmath@tonumber{\pgf@x}}%
\addtosavedmacro\halfarcangle%
%
% Get the (half) node dimensions x & y.
%
\pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/inner xsep}}%
\edef\innerxsep{\the\pgf@x}%
\pgf@xa=0.5\wd\pgfnodeparttextbox%
\edef\halftextwidth{\the\pgf@xa}%
\addtosavedmacro\halftextwidth%
\advance\pgf@x by\pgf@xa%
%
\pgfmathsetlength\pgf@y{\pgfkeysvalueof{/pgf/inner ysep}}%
\edef\innerysep{\the\pgf@y}%
\pgf@ya=.5\ht\pgfnodeparttextbox%
\advance\pgf@ya by.5\dp\pgfnodeparttextbox%
\edef\halftextheight{\the\pgf@ya}%
\addtosavedmacro\halftextheight%
\advance\pgf@y by\pgf@ya%
%
% Adjust for minimum height
%
\pgfmathsetlength\pgf@yb{\pgfkeysvalueof{/pgf/minimum height}}%
\ifdim\pgf@y<.5\pgf@yb%
\pgf@y=.5\pgf@yb%
\fi%
\edef\halfheight{\the\pgf@y}%
\addtosavedmacro\halfheight%
%
% Calculate the radius of the arc ends.
%
\pgfmathcosec@{\halfarcangle}%
\pgf@ya=\pgfmathresult\pgf@y%
\edef\radius{\the\pgf@ya}%
\addtosavedmacro\radius%
%
% Arc width = r - r*cos(a/2).
%
\pgfmathcos@{\halfarcangle}%
\pgf@xa=\pgf@ya%
\advance\pgf@xa by-\pgfmathresult\pgf@ya%
%
% When the node contents are pushed inside a convex arc,
% the resulting chord has a height r - r*cos(asin(0.5*h/r)).
%
\pgfmathdivide{\halftextheight}{\radius}%
\pgfmathasin@{\pgfmathresult}%
\pgfmathcos@{\pgfmathresult}%
\pgf@xb=\pgf@ya%
\advance\pgf@xb by-\pgfmathresult\pgf@ya%
%
% Adjust for minimum width.
%
\edef\westarc{\pgfkeysvalueof{/pgf/rounded rectangle west arc}}%
\edef\eastarc{\pgfkeysvalueof{/pgf/rounded rectangle east arc}}%
%
\pgfutil@tempdima=2.0\pgf@x% x still holds the half width.
\ifx\westarc\pgf@lib@sh@misc@rr@text@concave%
\advance\pgfutil@tempdima by\pgf@xa%
\else%
\ifx\westarc\pgf@lib@sh@misc@rr@text@convex%
\advance\pgfutil@tempdima by\pgf@xb%
\fi%
\fi%
%
\ifx\eastarc\pgf@lib@sh@misc@rr@text@concave%
\advance\pgfutil@tempdima by\pgf@xa%
\else%
\ifx\eastarc\pgf@lib@sh@misc@rr@text@convex%
\advance\pgfutil@tempdima by\pgf@xb%
\fi%
\fi%
%
\pgfmathsetlength\pgfutil@tempdimb{\pgfkeysvalueof{/pgf/minimum width}}%
\ifdim\pgfutil@tempdima<\pgfutil@tempdimb%
\advance\pgfutil@tempdimb by-\pgfutil@tempdima%
\divide\pgfutil@tempdimb by2\relax%
\edef\xoffset{\the\pgfutil@tempdimb}%
\else%
\let\xoffset=\innerxsep%
\fi%
%
% The node is made wider if convex arcs overlap.
%
\pgf@x=\halftextwidth\relax%
\advance\pgf@x by\xoffset\relax%
\pgf@xc=\pgf@ya%
\advance\pgf@xc by-\pgf@xb%
\ifdim\pgf@xc>\pgf@x\relax%
\advance\pgf@xc by-\pgf@x%
\advance\pgf@xc by\xoffset\relax%
\edef\xoffset{\the\pgf@xc}%
\fi%
\addtosavedmacro\xoffset%
%
\pgf@x=\halftextwidth\relax%
\advance\pgf@x by\xoffset\relax%
\edef\halfwidth{\the\pgf@x}%
\addtosavedmacro\halfwidth%
%
\edef\arcwidth{\the\pgf@xa}%
\addtosavedmacro\arcwidth%
%
\edef\chordwidth{\the\pgf@xb}%
\addtosavedmacro\chordwidth%
%
\pgfmathsetlengthmacro\outerxsep{\pgfkeysvalueof{/pgf/outer xsep}}%
\pgfmathsetlengthmacro\outerysep{\pgfkeysvalueof{/pgf/outer ysep}}%
\addtosavedmacro\outerxsep%
\addtosavedmacro\outerysep%
%
% calculate some horizontal adjustments made for the default miter
% drawn when an arc meets the north or south side of the node path.
%
\ifdim\halfarcangle pt=90pt\relax% Avoid division by zero.
\def\concavexshift{0pt}%
\else%
% For a concave arc: outer xsep * cosec((90-a/2)/2)*cos((90-a/2)/2).
\pgfmathsubtract@{90}{\halfarcangle}%
\pgfmathdivide@{\pgfmathresult}{2}%
\let\angletemp=\pgfmathresult%
\pgf@x=\outerxsep\relax%
\pgfmathcosec@{\angletemp}%
\pgf@x=\pgfmathresult\pgf@x%
\pgfmathcos@{\angletemp}%
\pgf@x=\pgfmathresult\pgf@x%
\edef\concavexshift{\the\pgf@x}%
\fi%
\addtosavedmacro\concavexshift%
%
\ifdim\halfarcangle pt=90pt\relax% Avoid division by zero.
\def\convexxshift{0pt}%
\else%
% For a convex arc: outer xsep * cosec((90+a/2)/2)*cos((90+a/2)/2).
\pgfmathadd@{90}{\halfarcangle}%
\pgfmathdivide@{\pgfmathresult}{2}%
\let\angletemp=\pgfmathresult%
\pgf@x=\outerxsep\relax%
\pgfmathcosec@{\angletemp}%
\pgf@x=\pgfmathresult\pgf@x%
\pgfmathcos@{\angletemp}%
\pgf@x=\pgfmathresult\pgf@x%
\edef\convexxshift{\the\pgf@x}%
\fi%
\addtosavedmacro\convexxshift%
}%
\saveddimen\halflinewidth{\pgf@x.5\pgflinewidth}%
\savedanchor\centerpoint{%
\pgf@x=.5\wd\pgfnodeparttextbox%
\pgf@y=.5\ht\pgfnodeparttextbox%
\advance\pgf@y by-.5\dp\pgfnodeparttextbox%
}%
\savedanchor\midpoint{%
\pgf@x=.5\wd\pgfnodeparttextbox%
\pgfmathsetlength\pgf@y{+0.5ex}%
}%
\savedanchor\basepoint{%
\pgf@x=.5\wd\pgfnodeparttextbox%
\pgf@y=0pt\relax%
}%
\anchor{center}{\centerpoint}%
\anchor{mid}{\midpoint}%
\anchor{mid west}{%
\csname pgf@anchor@rounded rectangle@west\endcsname%
\pgf@xc=\pgf@x%
\midpoint%
\pgf@x=\pgf@xc%
}%
\anchor{mid east}{%
\csname pgf@anchor@rounded rectangle@east\endcsname%
\pgf@xc=\pgf@x%
\midpoint%
\pgf@x=\pgf@xc%
}%
\anchor{base}{\basepoint}%
\anchor{base west}{%
\csname pgf@anchor@rounded rectangle@west\endcsname%
\pgf@xc=\pgf@x%
\basepoint%
\pgf@x=\pgf@xc%
}%
\anchor{base east}{%
\csname pgf@anchor@rounded rectangle@east\endcsname%
\pgf@xc=\pgf@x%
\basepoint%
\pgf@x=\pgf@xc%
}%
\anchor{north}{%
\roundedrectanglepoints%
\pgfpointadd{\centerpoint}{\pgfpoint{+0pt}{\halfheight+\outerysep}}%
}%
\anchor{south}{%
\roundedrectanglepoints%
\pgfpointadd{\centerpoint}{\pgfpoint{+0pt}{-\halfheight-\outerysep}}%
}%
\anchor{west}{%
\roundedrectanglepoints%
\pgfpointadd{\centerpoint}{%
\ifx\westarc\pgf@lib@sh@misc@rr@text@concave%
\pgfpoint{-\halfwidth-\arcwidth-\concavexshift}{+0pt}%
\else%
\ifx\westarc\pgf@lib@sh@misc@rr@text@convex%
\pgfpoint{-\halfwidth-\chordwidth-\outerxsep}{+0pt}%
\else%
\pgfpoint{-\halfwidth-\outerxsep}{+0pt}%
\fi%
\fi%
}%
}%
\anchor{north west}{%
\roundedrectanglepoints%
\ifx\westarc\pgf@lib@sh@misc@rr@text@convex%
\pgfpointadd{\centerpoint}{\pgfpoint{-\halfwidth-\chordwidth+\arcwidth-\convexxshift}{+0pt}}%
\else%
\csname pgf@anchor@rounded rectangle@west\endcsname%
\fi%
\pgf@xc=\pgf@x%
\csname pgf@anchor@rounded rectangle@north\endcsname%
\pgf@x=\pgf@xc%
}%
\anchor{south west}{%
\roundedrectanglepoints%
\ifx\westarc\pgf@lib@sh@misc@rr@text@convex%
\pgfpointadd{\centerpoint}{\pgfpoint{-\halfwidth-\chordwidth+\arcwidth-\convexxshift}{+0pt}}%
\else%
\csname pgf@anchor@rounded rectangle@west\endcsname%
\fi%
\pgf@xc=\pgf@x%
\csname pgf@anchor@rounded rectangle@south\endcsname%
\pgf@x=\pgf@xc%
}%
\anchor{east}{%
\roundedrectanglepoints%
\pgfpointadd{\centerpoint}{%
\ifx\eastarc\pgf@lib@sh@misc@rr@text@concave%
\pgfpoint{\halfwidth+\arcwidth+\concavexshift}{+0pt}%
\else%
\ifx\eastarc\pgf@lib@sh@misc@rr@text@convex%
\pgfpoint{\halfwidth+\chordwidth+\outerxsep}{+0pt}%
\else%
\pgfpoint{\halfwidth+\outerxsep}{+0pt}%
\fi%
\fi%
}%
}%
\anchor{north east}{%
\roundedrectanglepoints%
\ifx\eastarc\pgf@lib@sh@misc@rr@text@convex%
\pgfpointadd{\centerpoint}{\pgfpoint{\halfwidth+\chordwidth-\arcwidth+\convexxshift}{+0pt}}%
\else%
\csname pgf@anchor@rounded rectangle@east\endcsname%
\fi%
\pgf@xc=\pgf@x%
\csname pgf@anchor@rounded rectangle@north\endcsname%
\pgf@x=\pgf@xc%
}%
\anchor{south east}{%
\roundedrectanglepoints%
\ifx\eastarc\pgf@lib@sh@misc@rr@text@convex%
\pgfpointadd{\centerpoint}{\pgfpoint{\halfwidth+\chordwidth-\arcwidth+\convexxshift}{+0pt}}%
\else%
\csname pgf@anchor@rounded rectangle@east\endcsname%
\fi%
\pgf@xc=\pgf@x%
\csname pgf@anchor@rounded rectangle@south\endcsname%
\pgf@x=\pgf@xc%
}%
\backgroundpath{%
{%
\roundedrectanglepoints%
\pgftransformshift{\centerpoint}%
\pgfpathmoveto{\pgfpoint{0pt}{\halfheight}}%
\ifx\eastarc\pgf@lib@sh@misc@rr@text@concave%
\pgfpathlineto{\pgfpoint{\halfwidth+\arcwidth}{+\halfheight}}%
\pgfpatharc{180-\halfarcangle}{180+\halfarcangle}{+\radius}%
\else%
\ifx\eastarc\pgf@lib@sh@misc@rr@text@convex%
\pgfpathlineto{\pgfpoint{\halfwidth+\chordwidth-\arcwidth}{+\halfheight}}%
\pgfpatharc{+\halfarcangle}{+-\halfarcangle}{+\radius}%
\else%
\pgfpathlineto{\pgfqpoint{\halfwidth}{\halfheight}}%
\pgfpathlineto{\pgfqpoint{\halfwidth}{-\halfheight}}%
\fi%
\fi%
\ifx\westarc\pgf@lib@sh@misc@rr@text@concave%
\pgfpathlineto{\pgfpoint{-\halfwidth-\arcwidth}{+-\halfheight}}%
\pgfpatharc{+-\halfarcangle}{+\halfarcangle}{+\radius}%
\else%
\ifx\westarc\pgf@lib@sh@misc@rr@text@convex%
\pgfpathlineto{\pgfpoint{-\halfwidth-\chordwidth+\arcwidth}{+-\halfheight}}%
\pgfpatharc{180+\halfarcangle}{180-\halfarcangle}{+\radius}%
\else%
\pgfpathlineto{\pgfqpoint{-\halfwidth}{-\halfheight}}%
\pgfpathlineto{\pgfqpoint{-\halfwidth}{\halfheight}}%
\fi%
\fi%
\pgfpathclose%
}%
}%
\anchorborder{%
\pgfextract@process\externalpoint{%
\pgfextract@process\externalpoint{}%
\pgfpointadd{\centerpoint}{\externalpoint}%
}%
\roundedrectanglepoints%
%
\pgfmathanglebetweenpoints{\centerpoint}{\externalpoint}%
\let\externalangle=\pgfmathresult%
\pgfmathanglebetweenpoints{\centerpoint}{\csname pgf@anchor@rounded rectangle@north west\endcsname}%
\ifdim\externalangle pt<\pgfmathresult pt\relax%
\pgfmathanglebetweenpoints{\centerpoint}{\csname pgf@anchor@rounded rectangle@north east\endcsname}%
\ifdim\externalangle pt<\pgfmathresult pt\relax%
% Between north east and east.
\ifx\eastarc\pgf@lib@sh@misc@rr@text@convex%
\pgfextract@process\arccenter{%
\pgfpointadd{\centerpoint}{\pgfpoint{\halfwidth+\chordwidth-\radius}{+0pt}}%
}%
\pgfmathpointintersectionoflineandarc{\externalpoint}{\centerpoint}%
{\arccenter}{0}{\halfarcangle}{\radius+\outerxsep and \radius+\outerysep}%
\else%
\pgfpointintersectionoflines%
{\csname pgf@anchor@rounded rectangle@north east\endcsname}%
{\csname pgf@anchor@rounded rectangle@south east\endcsname}%
{\externalpoint}{\centerpoint}%
\fi%
\else%
% Between north west and north east.
\pgfpointintersectionoflines%
{\csname pgf@anchor@rounded rectangle@north east\endcsname}%
{\csname pgf@anchor@rounded rectangle@north west\endcsname}%
{\externalpoint}{\centerpoint}%
\fi%
\else%
\pgfmathanglebetweenpoints{\centerpoint}{\csname pgf@anchor@rounded rectangle@south west\endcsname}%
\ifdim\externalangle pt<\pgfmathresult pt\relax%
% Between south west and north west.
\ifx\westarc\pgf@lib@sh@misc@rr@text@convex%
\pgfextract@process\arccenter{%
\pgfpointadd{\centerpoint}{\pgfpoint{-\halfwidth-\chordwidth+\radius}{+0pt}}%
}%
\pgfmathpointintersectionoflineandarc{\externalpoint}{\centerpoint}%
{\arccenter}{180-\halfarcangle}{180+\halfarcangle}{\radius+\outerxsep and \radius+\outerysep}%
\else%
\pgfpointintersectionoflines%
{\csname pgf@anchor@rounded rectangle@north west\endcsname}%
{\csname pgf@anchor@rounded rectangle@south west\endcsname}%
{\externalpoint}{\centerpoint}%
\fi%
\else%
\pgfmathanglebetweenpoints{\centerpoint}{\csname pgf@anchor@rounded rectangle@south east\endcsname}%
\ifdim\externalangle pt<\pgfmathresult pt\relax%
% Between south east and south west.
\pgfpointintersectionoflines%
{\csname pgf@anchor@rounded rectangle@south east\endcsname}%
{\csname pgf@anchor@rounded rectangle@south west\endcsname}%
{\externalpoint}{\centerpoint}%
\else%
% Between east and south east.
\ifx\eastarc\pgf@lib@sh@misc@rr@text@convex%
\pgfextract@process\arccenter{%
\pgfpointadd{\centerpoint}{\pgfpoint{\halfwidth+\chordwidth-\radius}{+0pt}}%
}%
\pgfmathpointintersectionoflineandarc{\externalpoint}{\centerpoint}%
{\arccenter}{360-\halfarcangle}{360}{\radius+\outerxsep and \radius+\outerysep}%
\else%
\pgfpointintersectionoflines%
{\csname pgf@anchor@rounded rectangle@north east\endcsname}%
{\csname pgf@anchor@rounded rectangle@south east\endcsname}%
{\externalpoint}{\centerpoint}%
\fi%
\fi%
\fi%
\fi%
}%
}%
% Keys for chamfered rectangle
%
% /pgf/chamfered rectangle corners : specify the corners to chamfer.
% /pgf/chamfered rectangle angle : set the angle of the chamfer.
% /pgf/chamfered rectangle xsep : set the extent of the x chamferling.
% /pgf/chamfered rectangle ysep : set the extent of the y chamferling.
\pgfkeys{/pgf/chamfered rectangle corners/.store in=\pgf@lib@sh@misc@cr@corners}%
\pgfkeys{/tikz/chamfered rectangle corners/.store in=\pgf@lib@sh@misc@cr@corners}%
\def\pgf@lib@sh@misc@cr@chamferall{chamfer all}%
\def\pgf@lib@sh@misc@cr@chamfer{chamfer}%
\let\pgf@lib@sh@misc@cr@corners\pgf@lib@sh@misc@cr@chamferall
\def\pgf@lib@sh@misc@cr@getcorners{%
\let\northeastcorner\pgfutil@empty%
\let\southeastcorner\pgfutil@empty%
\let\southwestcorner\pgfutil@empty%
\let\northwestcorner\pgfutil@empty%
\expandafter\pgfutil@in@\expandafter{\pgf@lib@sh@misc@cr@corners}{chamfer all}%
\ifpgfutil@in@%
\let\northeastcorner\pgf@lib@sh@misc@cr@round%
\let\southeastcorner\pgf@lib@sh@misc@cr@round%
\let\southwestcorner\pgf@lib@sh@misc@cr@round%
\let\northwestcorner\pgf@lib@sh@misc@cr@round%
\let\pgf@next\relax%
\else%
\let\pgf@next\pgf@lib@sh@misc@cr@parsecorners%
\fi%
\pgf@next}%
\def\pgf@lib@sh@misc@cr@parsecorners{%
\expandafter\pgf@@chamferedrectangle@parsecorners\pgf@lib@sh@misc@cr@corners,\pgf@stop,%
}%
\def\pgf@@chamferedrectangle@parsecorners#1,{%
\ifx#1\pgf@stop%
\let\pgf@next\relax%
\else%
\pgfutil@in@{@#1@}{@north east@@top left@}%
\ifpgfutil@in@%
\let\northeastcorner\pgf@lib@sh@misc@cr@chamfer%
\else%
\pgfutil@in@{@#1@}{@south east@@bottom right@}%
\ifpgfutil@in@%
\let\southeastcorner\pgf@lib@sh@misc@cr@chamfer%
\else%
\pgfutil@in@{@#1@}{@south west@@bottom left@}%
\ifpgfutil@in@%
\let\southwestcorner\pgf@lib@sh@misc@cr@chamfer%
\else%
\pgfutil@in@{@#1@}{@north west@@top right@}%
\ifpgfutil@in@%
\let\northwestcorner\pgf@lib@sh@misc@cr@round%
\fi%
\fi%
\fi%
\fi%
\let\pgf@next\pgf@@@chamferedrectangle@parsecorners%
\fi%
\pgf@next%
}%
\def\pgf@@@chamferedrectangle@parsecorners{%
\pgfutil@ifnextchar x{\pgf@@chamferedrectangle@parsecorners}{\pgf@@chamferedrectangle@parsecorners}%
}%
\pgfkeys{/pgf/.cd,
chamfered rectangle angle/.initial=45,%
chamfered rectangle xsep/.initial=.666ex,%
chamfered rectangle ysep/.initial=.666ex%
}%
\pgfkeys{/pgf/chamfered rectangle sep/.style={%
/pgf/chamfered rectangle xsep=#1,/pgf/chamfered rectangle ysep=#1}%
}%
% Shape chamfered rectangle.
%
%
\pgfdeclareshape{chamfered rectangle}{%
\savedmacro\getchamferedrectanglepoints{%
\pgf@lib@sh@misc@cr@getcorners%
%
% Get the node dimensions.
%
\pgfmathsetlength\pgf@xa{\pgfkeysvalueof{/pgf/inner xsep}}%
\advance\pgf@xa.5\wd\pgfnodeparttextbox%
\pgfmathsetlength\pgf@ya{\pgfkeysvalueof{/pgf/inner ysep}}%
\advance\pgf@ya.5\ht\pgfnodeparttextbox%
\advance\pgf@ya.5\dp\pgfnodeparttextbox%
%
% Get chamfer stuff.
%
\pgfmathsetlength\pgfutil@tempdima{\pgfkeysvalueof{/pgf/chamfered rectangle angle}}%
\ifdim\pgfutil@tempdima<89pt\relax%
\ifdim\pgfutil@tempdima<1pt\relax%
\pgfutil@tempdima1pt\relax%
\fi%
\else%
\pgfutil@tempdima89pt\relax%
\fi%
\pgfutil@tempdima-\pgfutil@tempdima%
\advance\pgfutil@tempdima90pt\relax%
\pgfmathtan@{\pgfmath@tonumber{\pgfutil@tempdima}}%
\let\tanangle\pgfmathresult%
\pgfmathcot@{\pgfmath@tonumber{\pgfutil@tempdima}}%
\let\cotangle\pgfmathresult%
\pgfmathsetlength\pgf@xb{\pgfkeysvalueof{/pgf/chamfered rectangle xsep}}%
\pgf@yc\tanangle\pgf@xb%
\ifdim\pgf@yc>\pgf@ya%
\pgf@yc\pgf@ya%
\pgf@xb\cotangle\pgf@yc%
\fi%
\pgfmathcot@{\pgfmath@tonumber{\pgfutil@tempdima}}%
\pgfmathsetlength\pgf@yb{\pgfkeysvalueof{/pgf/chamfered rectangle ysep}}%
\pgf@xc\cotangle\pgf@yb%
\ifdim\pgf@xc>\pgf@xa%
\pgf@xc\pgf@xa%
\pgf@yb\tanangle\pgf@xc%
\fi%
%
% Check for minimum width and height%
%
\pgfutil@tempdima\pgf@xa%
\advance\pgfutil@tempdima\pgf@xb%
\pgfmathsetlength\pgfutil@tempdimb{\pgfkeysvalueof{/pgf/minimum width}}%
\ifdim\pgfutil@tempdima<.5\pgfutil@tempdimb%
\pgf@xa.5\pgfutil@tempdimb%
\advance\pgf@xa-\pgf@xb%
\fi%
\pgfutil@tempdima\pgf@ya%
\advance\pgfutil@tempdima\pgf@yb%
\pgfmathsetlength\pgfutil@tempdimb{\pgfkeysvalueof{/pgf/minimum height}}%
\ifdim\pgfutil@tempdima<.5\pgfutil@tempdimb%
\pgf@ya.5\pgfutil@tempdimb%
\advance\pgf@ya-\pgf@yb%
\fi%
%
% Define the background path points.
%
\pgfextract@process\centerpoint{%
\pgfmathsetlength\pgf@x{+.5\wd\pgfnodeparttextbox}%
\pgfmathsetlength\pgf@y{+.5\ht\pgfnodeparttextbox}%
\pgfmathaddtolength\pgf@y{+-.5\dp\pgfnodeparttextbox}%
}%
\pgfextract@process\beforenortheast{%
\centerpoint%
\advance\pgf@x\pgf@xa%
\advance\pgf@x\pgf@xb%
\advance\pgf@y\pgf@ya%
\advance\pgf@y-\pgf@yc%
}%
\pgfextract@process\northeast{%
\centerpoint%
\advance\pgf@x\pgf@xa%
\advance\pgf@y\pgf@ya%
\ifx\northeastcorner\pgfutil@empty%
\advance\pgf@x\pgf@xb%
\advance\pgf@y\pgf@yb%
\fi%
}%
\pgfextract@process\afternortheast{%
\centerpoint%
\advance\pgf@x\pgf@xa%
\advance\pgf@x-\pgf@xc%
\advance\pgf@y\pgf@ya%
\advance\pgf@y\pgf@yb%
}%
\pgfextract@process\northwest{%
\centerpoint%
\advance\pgf@x-\pgf@xa%
\advance\pgf@y\pgf@ya%
\ifx\northwestcorner\pgfutil@empty%
\advance\pgf@x-\pgf@xb%
\advance\pgf@y\pgf@yb%
\fi%
}%
\pgfextract@process\beforesouthwest{%
\centerpoint%
\advance\pgf@x-\pgf@xa%
\advance\pgf@x-\pgf@xb%
\advance\pgf@y-\pgf@ya%
\advance\pgf@y\pgf@yc%
}%
\pgfextract@process\southwest{%
\centerpoint%
\advance\pgf@x-\pgf@xa%
\advance\pgf@y-\pgf@ya%
\ifx\southwestcorner\pgfutil@empty%
\advance\pgf@x-\pgf@xb%
\advance\pgf@y-\pgf@yb%
\fi%
}%
\pgfextract@process\aftersouthwest{%
\centerpoint%
\advance\pgf@x-\pgf@xa%
\advance\pgf@x\pgf@xc%
\advance\pgf@y-\pgf@ya%
\advance\pgf@y-\pgf@yb%
}%
\pgfextract@process\southeast{%
\centerpoint%
\advance\pgf@x\pgf@xa%
\advance\pgf@y-\pgf@ya%
\ifx\southeastcorner\pgfutil@empty%
\advance\pgf@x\pgf@xb%
\advance\pgf@y-\pgf@yb%
\fi%
}%
%
% Calculate the `miter' vectors.
%
\pgfmathanglebetweenlines{\beforenortheast}{\afternortheast}{\beforenortheast}%
{\beforesouthwest\pgf@ya\pgf@y\beforenortheast\pgf@y\pgf@ya}%
\pgfutil@tempdima\pgfmathresult pt\relax%
\ifdim\pgfutil@tempdima>180pt\relax%
\advance\pgfutil@tempdima-180pt\relax%
\fi%
\pgfmathsetlength\pgfutil@tempdimb{\pgfkeysvalueof{/pgf/outer xsep}}%
\ifdim\pgfutil@tempdima<90pt\relax%
\pgfmathcosec@{\pgfmath@tonumber{\pgfutil@tempdima}}%
\pgfutil@tempdimb\pgfmathresult\pgfutil@tempdimb%
\pgfutil@tempdima0pt\relax%
\else%
\pgfutil@tempdima.5\pgfutil@tempdima%
\pgfmathcosec@{\pgfmath@tonumber{\pgfutil@tempdima}}%
\pgfutil@tempdimb\pgfmathresult\pgfutil@tempdimb%
\pgfutil@tempdima-\pgfutil@tempdima%
\advance\pgfutil@tempdima90pt\relax%
\fi%
\pgfextract@process\before@ne@anchor{%
\beforenortheast%
\pgf@xa\pgf@x%
\pgf@ya\pgf@y%
\pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
\advance\pgf@x\pgf@xa%
\advance\pgf@y\pgf@ya%
}%
\pgfutil@tempdima-\pgfutil@tempdima%
\advance\pgfutil@tempdima180pt\relax%
\pgfextract@process\before@sw@anchor{%
\beforesouthwest%
\pgf@xa\pgf@x%
\pgf@ya\pgf@y%
\pgfqpointpolar{-\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
\advance\pgf@x\pgf@xa%
\advance\pgf@y\pgf@ya%
}%
%
\pgfmathanglebetweenlines{\afternortheast}{\aftersouthwest\pgf@xa\pgf@x\afternortheast\pgf@x\pgf@xa}%
{\afternortheast}{\beforenortheast}%
\pgfutil@tempdima\pgfmathresult pt\relax%
\ifdim\pgfutil@tempdima>270pt\relax%
\advance\pgfutil@tempdima-270pt\relax%
\fi%
\pgfmathsetlength\pgfutil@tempdimb{\pgfkeysvalueof{/pgf/outer ysep}}%
\ifdim\pgfutil@tempdima<90pt\relax%
\pgfmathcosec@{\pgfmath@tonumber{\pgfutil@tempdima}}%
\pgfutil@tempdimb\pgfmathresult\pgfutil@tempdimb%
\pgfutil@tempdima90pt\relax%
\else%
\pgfutil@tempdima.5\pgfutil@tempdima%
\pgfmathcosec@{\pgfmath@tonumber{\pgfutil@tempdima}}%
\pgfutil@tempdimb\pgfmathresult\pgfutil@tempdimb%
\fi%
%
\pgfextract@process\after@ne@anchor{%
\afternortheast%
\pgf@xa\pgf@x%
\pgf@ya\pgf@y%
\pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
\advance\pgf@x\pgf@xa%
\advance\pgf@y\pgf@ya%
}%
\pgfutil@tempdima-\pgfutil@tempdima%
\advance\pgfutil@tempdima180pt\relax%
\pgfextract@process\after@sw@anchor{%
\aftersouthwest
\pgf@xa\pgf@x%
\pgf@ya\pgf@y%
\pgfqpointpolar{-\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
\advance\pgf@x\pgf@xa%
\advance\pgf@y\pgf@ya%
}%
\addtosavedmacro\before@ne@anchor%
\addtosavedmacro\after@ne@anchor%
\addtosavedmacro\before@sw@anchor%
\addtosavedmacro\after@sw@anchor%
\pgfextract@process\ne@anchor{%
\ifx\northeastcorner\pgfutil@empty%
\northeast%
\pgfmathaddtolength\pgf@x{\pgfkeysvalueof{/pgf/outer xsep}}%
\pgfmathaddtolength\pgf@y{\pgfkeysvalueof{/pgf/outer ysep}}%
\else%
\pgfpointlineattime{0.5}{\before@ne@anchor}{\after@ne@anchor}%
\fi%
}%
\pgfextract@process\nw@anchor{%
\ifx\northwestcorner\pgfutil@empty%
\northwest%
\pgfmathaddtolength\pgf@x{-\pgfkeysvalueof{/pgf/outer xsep}}%
\pgfmathaddtolength\pgf@y{\pgfkeysvalueof{/pgf/outer ysep}}%
\else%
\pgfpointlineattime{0.5}{%
\before@ne@anchor%
\pgf@ya\pgf@y
\before@sw@anchor%
\pgf@y\pgf@ya%
}{%
\after@ne@anchor%
\pgf@ya\pgf@y
\after@sw@anchor%
\pgf@y\pgf@ya%
}%
\fi%
}%
\pgfextract@process\sw@anchor{%
\ifx\southwestcorner\pgfutil@empty%
\southwest%
\pgfmathaddtolength\pgf@x{-\pgfkeysvalueof{/pgf/outer xsep}}%
\pgfmathaddtolength\pgf@y{-\pgfkeysvalueof{/pgf/outer ysep}}%
\else%
\pgfpointlineattime{0.5}{\before@sw@anchor}{\after@sw@anchor}%
\fi%
}%
\pgfextract@process\se@anchor{%
\ifx\southeastcorner\pgfutil@empty%
\southeast%
\pgfmathaddtolength\pgf@x{\pgfkeysvalueof{/pgf/outer xsep}}%
\pgfmathaddtolength\pgf@y{-\pgfkeysvalueof{/pgf/outer ysep}}%
\else%
\pgfpointlineattime{0.5}{%
\before@ne@anchor%
\pgf@xa\pgf@x
\before@sw@anchor%
\pgf@x\pgf@xa%
}{%
\after@ne@anchor%
\pgf@xa\pgf@x
\after@sw@anchor%
\pgf@x\pgf@xa%
}%
\fi%
}%
\addtosavedmacro\ne@anchor%
\addtosavedmacro\nw@anchor%
\addtosavedmacro\sw@anchor%
\addtosavedmacro\se@anchor%
}%
\savedanchor\centerpoint{%
\pgf@x.5\wd\pgfnodeparttextbox%
\pgf@y.5\ht\pgfnodeparttextbox%
\advance\pgf@y-.5\dp\pgfnodeparttextbox%
}%
\savedanchor\midpoint{%
\pgf@x.5\wd\pgfnodeparttextbox%
\pgfmathsetlength\pgf@y{+.5ex}%
}%
\savedanchor\basepoint{%
\pgf@x.5\wd\pgfnodeparttextbox%
\pgf@y0pt%
}%
\anchor{center}{\centerpoint}%
\anchor{mid}{\midpoint}%
\anchor{mid east}{%
\getchamferedrectanglepoints%
\midpoint%
\pgf@ya\pgf@y%
\pgf@process{%
\before@sw@anchor%
\pgf@ya\pgf@y%
\before@ne@anchor%
\pgf@y\pgf@ya%
}%
\ifdim\pgf@ya<\pgf@y%
\pgfpointintersectionoflines{\midpoint}{\midpoint\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\before@sw@anchor\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\after@sw@anchor\pgf@ya\pgf@y\after@ne@anchor\pgf@y\pgf@ya}%
\else%
\pgf@process{\before@ne@anchor}%
\ifdim\pgf@ya<\pgf@y%
\pgfpointintersectionoflines{\midpoint}{\midpoint\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\before@sw@anchor\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\before@ne@anchor}%
\else%
\pgfpointintersectionoflines{\midpoint}{\midpoint\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\before@ne@anchor}%
{\after@ne@anchor}%
\fi%
\fi%
}%
\anchor{mid west}{%
\getchamferedrectanglepoints%
\midpoint%
\pgf@ya\pgf@y%
\pgf@process{\before@sw@anchor}%
\ifdim\pgf@ya<\pgf@y%
\pgfpointintersectionoflines{\midpoint}{\midpoint\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\before@sw@anchor}{\after@sw@anchor}%
\else%
\pgf@process{\before@ne@anchor\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
\ifdim\pgf@ya<\pgf@y%
\pgfpointintersectionoflines{\midpoint}{\midpoint\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\before@ne@anchor\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\before@sw@anchor}%
\else%
\pgfpointintersectionoflines{\midpoint}{\midpoint\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\before@ne@anchor\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\after@ne@anchor\pgf@ya\pgf@y\after@sw@anchor\pgf@y\pgf@ya}%
\fi%
\fi%
}%
\anchor{base}{\basepoint}%
\anchor{base east}{%
\getchamferedrectanglepoints%
\basepoint%
\pgf@ya\pgf@y%
\pgf@process{%
\before@sw@anchor%
\pgf@ya\pgf@y%
\before@ne@anchor%
\pgf@y\pgf@ya%
}%
\ifdim\pgf@ya<\pgf@y%
\pgfpointintersectionoflines{\basepoint}{\basepoint\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\before@sw@anchor\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\after@sw@anchor\pgf@ya\pgf@y\after@ne@anchor\pgf@y\pgf@ya}%
\else%
\pgf@process{\before@ne@anchor}%
\ifdim\pgf@ya<\pgf@y%
\pgfpointintersectionoflines{\basepoint}{\basepoint\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\before@sw@anchor\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\before@ne@anchor}%
\else%
\pgfpointintersectionoflines{\basepoint}{\basepoint\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
{\before@ne@anchor}%
{\after@ne@anchor}%
\fi%
\fi%
}%
\anchor{base west}{%
\getchamferedrectanglepoints%
\basepoint%
\pgf@ya\pgf@y%
\pgf@process{\before@sw@anchor}%
\ifdim\pgf@ya<\pgf@y%
\pgfpointintersectionoflines{\basepoint}{\basepoint\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\before@sw@anchor}{\after@sw@anchor}%
\else%
\pgf@process{\before@ne@anchor\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
\ifdim\pgf@ya<\pgf@y%
\pgfpointintersectionoflines{\basepoint}{\basepoint\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\before@ne@anchor\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\before@sw@anchor}%
\else%
\pgfpointintersectionoflines{\basepoint}{\basepoint\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\before@ne@anchor\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
{\after@ne@anchor\pgf@ya\pgf@y\after@sw@anchor\pgf@y\pgf@ya}%
\fi%
\fi%
}%
\anchor{before north east}{\getchamferedrectanglepoints\before@ne@anchor}%
\anchor{north east}{\getchamferedrectanglepoints\ne@anchor}%
\anchor{after north east}{\getchamferedrectanglepoints\after@ne@anchor}%
\anchor{north}{%
\getchamferedrectanglepoints%
\centerpoint%
\pgf@xa\pgf@x%
\after@ne@anchor%
\pgf@x\pgf@xa}%
\anchor{before north west}{%
\getchamferedrectanglepoints%
\after@sw@anchor%
\pgf@xa\pgf@x%
\after@ne@anchor%
\pgf@x\pgf@xa}%
\anchor{north west}{\getchamferedrectanglepoints\nw@anchor}%
\anchor{after north west}{%
\getchamferedrectanglepoints%
\before@sw@anchor%
\pgf@xa\pgf@x%
\before@ne@anchor%
\pgf@x\pgf@xa}%
\anchor{west}{%
\getchamferedrectanglepoints%
\centerpoint%
\pgf@ya\pgf@y%
\before@sw@anchor%
\pgf@y\pgf@ya}%
\anchor{before south west}{\getchamferedrectanglepoints\before@sw@anchor}%
\anchor{south west}{\getchamferedrectanglepoints\sw@anchor}%
\anchor{after south west}{\getchamferedrectanglepoints\after@sw@anchor}%
\anchor{south}{%
\getchamferedrectanglepoints%
\centerpoint%
\pgf@xa\pgf@x%
\after@sw@anchor%
\pgf@x\pgf@xa}%
\anchor{before south east}{%
\getchamferedrectanglepoints%
\after@sw@anchor%
\pgf@ya\pgf@y%
\after@ne@anchor%
\pgf@y\pgf@ya}%
\anchor{south east}{\getchamferedrectanglepoints\se@anchor}%
\anchor{after south east}{%
\getchamferedrectanglepoints%
\before@sw@anchor%
\pgf@ya\pgf@y%
\before@ne@anchor%
\pgf@y\pgf@ya}%
\anchor{east}{%
\getchamferedrectanglepoints%
\centerpoint%
\pgf@ya\pgf@y%
\before@ne@anchor%
\pgf@y\pgf@ya}%
\backgroundpath{%
\pgfpathmoveto{\beforenortheast}%
\pgfpathlineto{\northeast}%
\pgfpathlineto{\afternortheast}%
\pgfpathlineto{\aftersouthwest\pgf@xa\pgf@x\afternortheast\pgf@x\pgf@xa}%
\pgfpathlineto{\northwest}%
\pgfpathlineto{\beforesouthwest\pgf@xa\pgf@x\beforenortheast\pgf@x\pgf@xa}%
\pgfpathlineto{\beforesouthwest}%
\pgfpathlineto{\southwest}%
\pgfpathlineto{\aftersouthwest}%
\pgfpathlineto{\aftersouthwest\pgf@ya\pgf@y\afternortheast\pgf@y\pgf@ya}%
\pgfpathlineto{\southeast}%
\pgfpathlineto{\beforesouthwest\pgf@ya\pgf@y\beforenortheast\pgf@y\pgf@ya}%
\pgfpathclose%
}%
\anchorborder{%
\pgfextract@process\externalpoint{%
\pgf@xa\pgf@x%
\pgf@ya\pgf@y%
\centerpoint%
\advance\pgf@x\pgf@xa%
\advance\pgf@y\pgf@ya%
}%
\pgfmathanglebetweenpoints{\centerpoint}{\externalpoint}%
\let\externalangle\pgfmathresult%
\getchamferedrectanglepoints%
\pgfmathanglebetweenpoints{\centerpoint}{\centerpoint\pgf@ya\pgf@y\before@sw@anchor\pgf@y\pgf@ya}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% west.
\pgfmathanglebetweenpoints{\centerpoint}{\centerpoint\pgf@xa\pgf@x\after@ne@anchor\pgf@x\pgf@xa}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% north.
\pgfmathanglebetweenpoints{\centerpoint}{\ne@anchor}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% north east.
\pgfmathanglebetweenpoints{\centerpoint}{\before@ne@anchor}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% before north east.
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\centerpoint\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}{\before@ne@anchor}%
\else%
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\before@ne@anchor}{\ne@anchor}%
\fi%
\else%
\pgfmathanglebetweenpoints{\centerpoint}{\after@ne@anchor}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% after north east.
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\ne@anchor}{\after@ne@anchor}%
\else%
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\after@ne@anchor}{\centerpoint\pgf@xa\pgf@x\after@ne@anchor\pgf@x\pgf@xa}%
\fi%
\fi%
\else%
\pgfmathanglebetweenpoints{\centerpoint}{\nw@anchor}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% north west.
\pgfmathanglebetweenpoints{\centerpoint}{\after@sw@anchor\pgf@xa\pgf@x\after@ne@anchor\pgf@x\pgf@xa}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% before north west.
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\centerpoint\pgf@xa\pgf@x\after@ne@anchor\pgf@x\pgf@xa}%
{\after@sw@anchor\pgf@xa\pgf@x\after@ne@anchor\pgf@x\pgf@xa}%
\else%
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\after@sw@anchor\pgf@xa\pgf@x\after@ne@anchor\pgf@x\pgf@xa}%
{\nw@anchor}%
\fi%
\else%
\pgfmathanglebetweenpoints{\centerpoint}{\before@sw@anchor\pgf@xa\pgf@x\before@ne@anchor\pgf@x\pgf@xa}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% after north west.
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\nw@anchor}{\before@sw@anchor\pgf@xa\pgf@x\before@ne@anchor\pgf@x\pgf@xa}%
\else%
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\before@sw@anchor\pgf@xa\pgf@x\before@ne@anchor\pgf@x\pgf@xa}%
{\before@sw@anchor\pgf@xa\pgf@x\centerpoint\pgf@x\pgf@xa}%
\fi%
\fi%
\fi%
\else%
\pgfmathanglebetweenpoints{\centerpoint}{\centerpoint\pgf@xa\pgf@x\after@sw@anchor\pgf@x\pgf@xa}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% south.
\pgfmathanglebetweenpoints{\centerpoint}{\sw@anchor}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% south west.
\pgfmathanglebetweenpoints{\centerpoint}{\before@sw@anchor}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% before south west.
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\before@sw@anchor\pgf@xa\pgf@x\centerpoint\pgf@x\pgf@xa}%
{\before@sw@anchor}%
\else%
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\before@sw@anchor}{\sw@anchor}%
\fi%
\else%
\pgfmathanglebetweenpoints{\centerpoint}{\after@sw@anchor}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% after south west.
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\sw@anchor}{\after@sw@anchor}%
\else%
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\after@sw@anchor}{\centerpoint\pgf@xa\pgf@x\after@sw@anchor\pgf@x\pgf@xa}%
\fi%
\fi%
\else%
\pgfmathanglebetweenpoints{\centerpoint}{\se@anchor}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% south east.
\pgfmathanglebetweenpoints{\centerpoint}{\after@ne@anchor\pgf@xa\pgf@x\after@sw@anchor\pgf@x\pgf@xa}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% before south east.
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\after@ne@anchor\pgf@xa\pgf@x\after@sw@anchor\pgf@x\pgf@xa}%
{\centerpoint\pgf@xa\pgf@x\after@sw@anchor\pgf@x\pgf@xa}%
\else%
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\after@ne@anchor\pgf@xa\pgf@x\after@sw@anchor\pgf@x\pgf@xa}{\se@anchor}
\fi%
\else%
\pgfmathanglebetweenpoints{\centerpoint}{\before@ne@anchor\pgf@xa\pgf@x\before@sw@anchor\pgf@x\pgf@xa}%
\ifdim\externalangle pt<\pgfmathresult pt\relax% after south east.
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\se@anchor}{\before@ne@anchor\pgf@xa\pgf@x\before@sw@anchor\pgf@x\pgf@xa}%
\else%
\pgfpointintersectionoflines{\centerpoint}{\externalpoint}%
{\before@ne@anchor\pgf@xa\pgf@x\before@sw@anchor\pgf@x\pgf@xa}%
{\centerpoint\pgf@ya\pgf@y\before@ne@anchor\pgf@y\pgf@ya}%
\fi%
\fi%
\fi%
\fi%
}%
}%
\endinput