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+% Copyright 2007 by Till Tantau and Mark Wibrow
+%
+% 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[v\pgfversion] $Header: /cvsroot/pgf/pgf/generic/pgf/libraries/shapes/pgflibraryshapes.arrows.code.tex,v 1.1 2008/06/26 16:55:55 tantau Exp $
+
+
+% keys for shape single arrow
+%
+% /pgf/single arrow tip angle
+% /pgf/single arrow head extend
+% /pgf/single arrow head indent
+
+\pgfkeys{/pgf/.cd,
+ single arrow tip angle/.initial=90,
+ single arrow head extend/.initial=.25cm,
+ single arrow head indent/.initial=0cm}
+
+% Shape single arrow
+%
+%
+\pgfdeclareshape{single arrow}{%
+ \savedmacro\getsinglearrowpoints{%
+ %
+ % Get the outer sep.
+ %
+ \pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/outer xsep}}%
+ \edef\xoutersep{\the\pgf@x}%
+ \pgfmathsetlength\pgf@y{\pgfkeysvalueof{/pgf/outer ysep}}%
+ \edef\youtersep{\the\pgf@y}%
+ %
+ % Get the node dimensions.
+ %
+ \pgfmathsetlength\pgf@xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+ \advance\pgf@xa.5\wd\pgfnodeparttextbox%
+ \advance\pgf@xa.5\pgflinewidth%
+ \pgfmathsetlength\pgf@ya{\pgfkeysvalueof{/pgf/inner ysep}}%
+ \advance\pgf@ya.5\ht\pgfnodeparttextbox%
+ \advance\pgf@ya.5\dp\pgfnodeparttextbox%
+ \advance\pgf@ya.5\pgflinewidth%
+ \ifpgfshapeborderusesincircle%
+ \ifdim\pgf@xa<\pgf@ya%
+ \pgf@xa\pgf@ya%
+ \fi%
+ \pgf@xa1.41421\pgf@xa%
+ \pgf@ya\pgf@xa%
+ \pgfmathsetmacro\rotate{\pgfkeysvalueof{/pgf/shape border rotate}}%
+ \ifdim\xoutersep>\youtersep\relax%
+ \let\youtersep\xoutersep%
+ \else%
+ \let\xoutersep\youtersep%
+ \fi%
+ \else%
+ %
+ % Round the rotation.
+ %
+ \pgfmathsetmacro\rotate{\pgfkeysvalueof{/pgf/shape border rotate}}%
+ \pgfmathmod@{\rotate}{360}%
+ \afterassignment\pgfmath@gobbletilpgfmath@%
+ \expandafter\c@pgf@counta\pgfmathresult\relax\pgfmath@%
+ \advance\c@pgf@counta45\relax%
+ \divide\c@pgf@counta90\relax%
+ \multiply\c@pgf@counta90\relax%
+ \ifnum\c@pgf@counta<0\relax%
+ \advance\c@pgf@counta360\relax%
+ \fi%
+ \edef\rotate{\the\c@pgf@counta}%
+ %
+ % Calculate the width and height of the node
+ % contents, according to any border rotation.
+ %
+ \ifnum\c@pgf@counta=90\relax%
+ \pgf@x\pgf@xa%
+ \pgf@xa\pgf@ya%
+ \pgf@ya\pgf@x%
+ \let\pgfmathresult\xoutersep%
+ \let\xoutersep\youtersep%
+ \let\youtersep\pgfmathresult%
+ \else%
+ \ifnum\c@pgf@counta=270\relax%
+ \pgf@x\pgf@xa%
+ \pgf@xa\pgf@ya%
+ \pgf@ya\pgf@x%
+ \let\pgfmathresult\xoutersep%
+ \let\xoutersep\youtersep%
+ \let\youtersep\pgfmathresult%
+ \fi%
+ \fi%
+ \fi%
+ \addtosavedmacro\rotate%
+ %
+ % Get some useful trig stuff.
+ %
+ \pgfmathdivide{\pgfkeysvalueof{/pgf/single arrow tip angle}}{2}%
+ \let\halftipangle\pgfmathresult%
+ \pgfmathcosec@{\halftipangle}%
+ \let\cosechalftipangle\pgfmathresult%
+ \pgfmathcos@{\halftipangle}%
+ \pgfutil@tempdima\pgfmathresult pt\relax%
+ \pgfutil@tempdima\cosechalftipangle\pgfutil@tempdima%
+ \edef\cothalftipangle{\pgfmath@tonumber{\pgfutil@tempdima}}%
+ \pgfmathreciprocal@{\pgfmathresult}%
+ \let\sechalftipangle\pgfmathresult%
+ \pgfmathsin@{\halftipangle}%
+ \pgfutil@tempdima\pgfmathresult pt\relax%
+ \pgfutil@tempdima\sechalftipangle\pgfutil@tempdima%
+ \edef\tanhalftipangle{\pgfmath@tonumber{\pgfutil@tempdima}}%
+ %
+ % Get the single arrow head extend, and adjust for minimum width.
+ %
+ \pgf@xb\pgf@ya%
+ \pgf@xb\cothalftipangle\pgf@xb%
+ \pgfmathsetlength\pgf@xc{\pgfkeysvalueof{/pgf/single arrow head extend}}%
+ \pgf@yc\pgf@xc%
+ \advance\pgf@xc\pgf@ya%
+ \pgfmathsetlength\pgfutil@tempdimb{\pgfkeysvalueof{/pgf/minimum width}}%
+ \ifdim\pgf@xc<.5\pgfutil@tempdimb%
+ \pgfutil@tempdimb.5\pgfutil@tempdimb%
+ \pgfmathdivide@{\pgfmath@tonumber{\pgfutil@tempdimb}}{\pgfmath@tonumber{\pgf@xc}}%
+ \pgf@ya\pgfmathresult\pgf@ya%
+ \pgf@xc\pgfmathresult\pgf@xc%
+ \pgf@yc\pgfmathresult\pgf@yc%
+ \pgf@xb\pgfmathresult\pgf@xb%
+ \fi%
+ %
+ % Now calculate the height of the arrow and adjust for minimum height.
+ %
+ \advance\pgf@xc-\pgf@ya%
+ \pgf@xc\cothalftipangle\pgf@xc%
+ \pgf@xa2.0\pgf@xa%
+ \advance\pgf@xa\pgf@xb%
+ \pgfmathsetlength\pgfutil@tempdimb{\pgfkeysvalueof{/pgf/minimum height}}%
+ \ifdim\pgf@xa<\pgfutil@tempdimb%
+ \pgf@xa\pgfutil@tempdimb%
+ \fi%
+ \advance\pgf@xa-\pgf@xb%
+ \pgf@xa.5\pgf@xa%
+ \pgfmathsetlength\pgfutil@tempdima{\pgfkeysvalueof{/pgf/single arrow head indent}}%
+ %
+ % Now:
+ %
+ % xa - .5 * width of the node minus xb.
+ % ya - .5 * height of the node contents.
+ % xb - distance from the end of the node contents to the arrow tip.
+ % xc - distance from the end of the node contents to the back end of the arrow head.
+ % yc - distance from the top of the node contents to the top end of the arrow head.
+ %
+ \pgfsavepgf@process\centerpoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgf@y.5\ht\pgfnodeparttextbox%
+ \advance\pgf@y-.5\dp\pgfnodeparttextbox%
+ }%
+ \pgfsavepgf@process\basepoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgf@y0pt%
+ }%
+ \pgfsavepgf@process\midpoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgfmathsetlength\pgf@y{+.5ex}%
+ }%
+ %
+ % As the arrow is symmetrical it can be described by only four points:
+ %
+ \pgfsavepgf@process\arrowtip{%
+ \pgf@x\pgf@xa%
+ \advance\pgf@x\pgf@xb%
+ \pgf@y0pt\relax%
+ }%
+ \pgfsavepgf@process\beforearrowtip{%
+ \pgf@x\pgf@xa%
+ \advance\pgf@x-\pgf@xc%
+ \pgf@y\pgf@ya%
+ \advance\pgf@y\pgf@yc%
+ }%
+ \pgfsavepgf@process\beforearrowhead{%
+ \pgf@x\pgf@xa%
+ \advance\pgf@x-\pgf@xc%
+ \advance\pgf@x\pgfutil@tempdima%
+ \pgf@y\pgf@ya%
+ }%
+ \pgfsavepgf@process\afterarrowtail{%
+ \pgf@x-\pgf@xa%
+ \pgf@y\pgf@ya%
+ }%
+ %
+ % Calculate the anchor point at the arrow tip...
+ %
+ \pgfsavepgf@process\arrowtipanchor{%
+ \pgfpointadd{\centerpoint}{\arrowtip}%
+ \pgf@xa\xoutersep\relax%
+ \advance\pgf@x\cosechalftipangle\pgf@xa%
+ }%
+ \advance\pgf@x.5\wd\pgfnodeparttextbox%
+ \edef\externalradius{\the\pgf@x}%
+ \addtosavedmacro\externalradius%
+ %
+ % ...and the rest of the points.
+ %
+ \pgfmathanglebetweenlines{\beforearrowtip}{\beforearrowhead}{\beforearrowtip}{\arrowtip}%
+ \pgf@xa\xoutersep\relax%
+ \pgfutil@tempdima\pgfmathresult pt\relax%
+ \pgfutil@tempdima.5\pgfutil@tempdima%
+ \pgfmathcosec@{\pgfmath@tonumber{\pgfutil@tempdima}}%
+ \pgf@xa\pgfmathresult\pgf@xa%
+ \pgfutil@tempdima-\pgfutil@tempdima%
+ \advance\pgfutil@tempdima180pt\relax%
+ \advance\pgfutil@tempdima-\halftipangle pt\relax%
+ %
+ \pgfsavepgf@process\beforearrowtipanchor{%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgf@xa}%
+ \pgf@xb\pgf@x%
+ \pgf@yb\pgf@y%
+ \pgf@process{\pgfpointadd{\centerpoint}{\beforearrowtip}}%
+ \advance\pgf@x\pgf@xb%
+ \advance\pgf@y\pgf@yb%
+ }%
+ \pgfmathanglebetweenpoints{\beforearrowhead}{\beforearrowtip}%
+ \pgfutil@tempdima-\pgfmathresult pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdima.5\pgfutil@tempdima%
+ \pgfmathcosec@{\pgfmath@tonumber{\pgfutil@tempdima}}%
+ \pgf@xa\xoutersep\relax%
+ \pgf@xa\pgfmathresult\pgf@xa%
+ \pgfutil@tempdima-\pgfutil@tempdima%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfsavepgf@process\beforearrowheadanchor{%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgf@xa}%
+ \pgf@xb\pgf@x%
+ \pgf@yb\pgf@y%
+ \pgf@process{\pgfpointadd{\centerpoint}{\beforearrowhead}}%
+ \advance\pgf@x\pgf@xb%
+ \advance\pgf@y\pgf@yb%
+ }%
+ \pgfsavepgf@process\afterarrowtailanchor{%
+ \pgfpointadd{\centerpoint}{\afterarrowtail}%
+ \advance\pgf@x-\xoutersep\relax%
+ \advance\pgf@y\youtersep\relax%
+ }%
+ %
+ \pgfmathanglebetweenpoints{\centerpoint}{\beforearrowtipanchor}%
+ \let\center@angle@beforearrowtip\pgfmathresult%
+ \pgfmathanglebetweenpoints{\centerpoint}{\beforearrowheadanchor}%
+ \let\center@angle@beforearrowhead\pgfmathresult%
+ \pgfmathanglebetweenpoints{\centerpoint}{\afterarrowtailanchor}%
+ \let\center@angle@afterarrowtail\pgfmathresult%
+ \addtosavedmacro\center@angle@beforearrowtip%
+ \addtosavedmacro\center@angle@beforearrowhead%
+ \addtosavedmacro\center@angle@afterarrowtail%
+ %
+ \pgfmathanglebetweenpoints{\midpoint}{\beforearrowtipanchor}%
+ \let\mid@angle@beforearrowtip\pgfmathresult%
+ \pgfmathanglebetweenpoints{\midpoint}{\beforearrowheadanchor}%
+ \let\mid@angle@beforearrowhead\pgfmathresult%
+ \pgfmathanglebetweenpoints{\midpoint}{\afterarrowtailanchor}%
+ \let\mid@angle@afterarrowtail\pgfmathresult%
+ \addtosavedmacro\mid@angle@beforearrowtip%
+ \addtosavedmacro\mid@angle@beforearrowhead%
+ \addtosavedmacro\mid@angle@afterarrowtail%
+ %
+ \pgfmathanglebetweenpoints{\basepoint}{\beforearrowtipanchor}%
+ \let\base@angle@beforearrowtip\pgfmathresult%
+ \pgfmathanglebetweenpoints{\basepoint}{\beforearrowheadanchor}%
+ \let\base@angle@beforearrowhead\pgfmathresult%
+ \pgfmathanglebetweenpoints{\basepoint}{\afterarrowtailanchor}%
+ \let\base@angle@afterarrowtail\pgfmathresult%
+ \addtosavedmacro\base@angle@beforearrowtip%
+ \addtosavedmacro\base@angle@beforearrowhead%
+ \addtosavedmacro\base@angle@afterarrowtail%
+ %
+ \addtosavedmacro\arrowtipanchor%
+ \addtosavedmacro\beforearrowtipanchor%
+ \addtosavedmacro\beforearrowheadanchor%
+ \addtosavedmacro\afterarrowtailanchor%
+ }
+ \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{+0.5ex}%
+ }%
+ \savedanchor\basepoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgf@y0pt%
+ }%
+ \anchor{center}{\centerpoint}%
+ \anchor{mid}{\midpoint}%
+ \anchor{mid east}{%
+ \getsinglearrowpoints%
+ \let\pgf@singlearrow@referencepoint\midpoint%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{\externalradius}{0pt}}%
+ }
+ \anchor{mid west}{%
+ \getsinglearrowpoints%
+ \let\pgf@singlearrow@referencepoint\midpoint%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{-\externalradius}{0pt}}%
+ }
+ \anchor{base}{\basepoint}%
+ \anchor{base east}{%
+ \getsinglearrowpoints%
+ \let\pgf@singlearrow@referencepoint\basepoint%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{\externalradius}{0pt}}%
+ }
+ \anchor{base west}{%
+ \getsinglearrowpoints%
+ \let\pgf@singlearrow@referencepoint\basepoint%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{-\externalradius}{0pt}}%
+ }
+ \anchor{north}{%
+ \getsinglearrowpoints%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{0pt}{\externalradius}}%
+ }
+ \anchor{south}{%
+ \getsinglearrowpoints%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{0pt}{-\externalradius}}%
+ }
+ \anchor{east}{%
+ \getsinglearrowpoints%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{\externalradius}{0pt}}%
+ }
+ \anchor{west}{%
+ \getsinglearrowpoints%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{-\externalradius}{0pt}}%
+ }
+ \anchor{north east}{%
+ \getsinglearrowpoints%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{\externalradius}{\externalradius}}%
+ }
+ \anchor{south east}{%
+ \getsinglearrowpoints%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{\externalradius}{-\externalradius}}%
+ }
+ \anchor{south west}{%
+ \getsinglearrowpoints%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{-\externalradius}{-\externalradius}}%
+ }
+ \anchor{north west}{%
+ \getsinglearrowpoints%
+ \csname pgf@anchor@single arrow@border\endcsname{\pgfqpoint{-\externalradius}{\externalradius}}%
+ }
+ \anchor{before head}{%
+ \getsinglearrowpoints%
+ \pgfmathrotatepointaround{\beforearrowheadanchor}{\centerpoint}{\rotate}%
+ }%
+ \anchor{before tip}{%
+ \getsinglearrowpoints%
+ \pgfmathrotatepointaround{\beforearrowtipanchor}{\centerpoint}{\rotate}%
+ }%
+ \anchor{tip}{%
+ \getsinglearrowpoints%
+ \pgfmathrotatepointaround{\arrowtipanchor}{\centerpoint}{\rotate}%
+ }%
+ \anchor{after tip}{%
+ \getsinglearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowtipanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }
+ \anchor{after head}{%
+ \getsinglearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowheadanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }
+ \anchor{before tail}{%
+ \getsinglearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\afterarrowtailanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }
+ \anchor{after tail}{%
+ \getsinglearrowpoints%
+ \pgfmathrotatepointaround{\afterarrowtailanchor}{\centerpoint}{\rotate}%
+ }
+ \anchor{tail}{%
+ \getsinglearrowpoints%
+ \pgfpointlineattime{0.5}{%
+ \pgfmathrotatepointaround{\afterarrowtailanchor}{\centerpoint}{\rotate}%
+ }%
+ {%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\afterarrowtailanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }%
+ }%
+ \backgroundpath{%
+ {%
+ \pgftransformshift{\centerpoint}%
+ \pgftransformrotate{\rotate}%
+ \pgfpathmoveto{\arrowtip}%
+ \pgfpathlineto{\beforearrowtip}%
+ \pgfpathlineto{\beforearrowhead}%
+ \pgfpathlineto{\afterarrowtail}%
+ \pgfpathlineto{\afterarrowtail\pgf@y-\pgf@y}%
+ \pgfpathlineto{\beforearrowhead\pgf@y-\pgf@y}%
+ \pgfpathlineto{\beforearrowtip\pgf@y-\pgf@y}%
+ }%
+ \pgfpathclose%
+ }%
+ \anchorborder{%
+ \pgfsavepgf@process\externalpoint{}%
+ \getsinglearrowpoints%
+ \pgfutil@ifundefined{pgf@singlearrow@referencepoint}{\let\referencepoint\centerpoint}%
+ {\let\referencepoint\pgf@singlearrow@referencepoint}%
+ \pgfsavepgf@process\externalpoint{%
+ \externalpoint%
+ \pgf@xa\pgf@x%
+ \pgf@ya\pgf@y%
+ \referencepoint%
+ \advance\pgf@x\pgf@xa%
+ \advance\pgf@y\pgf@ya}%
+ \pgfmathanglebetweenpoints{\centerpoint}{\externalpoint}%
+ \pgfmathsubtract@{\pgfmathresult}{\rotate}%
+ \ifdim\pgfmathresult pt<0pt\relax%
+ \pgfmathadd@{\pgfmathresult}{360}%
+ \fi%
+ \let\externalangle\pgfmathresult%
+ \pgf@x\externalangle pt\relax%
+ \ifx\referencepoint\midpoint%
+ \pgf@xa\mid@angle@beforearrowtip pt\relax%
+ \pgf@xb\mid@angle@beforearrowhead pt\relax%
+ \pgf@xc\mid@angle@afterarrowtail pt\relax%
+ \else%
+ \ifx\referencepoint\basepoint%
+ \pgf@xa\base@angle@beforearrowtip pt\relax%
+ \pgf@xb\base@angle@beforearrowhead pt\relax%
+ \pgf@xc\base@angle@afterarrowtail pt\relax%
+ \else%
+ \pgf@xa\center@angle@beforearrowtip pt\relax%
+ \pgf@xb\center@angle@beforearrowhead pt\relax%
+ \pgf@xc\center@angle@afterarrowtail pt\relax%
+ \fi%
+ \fi%
+ \ifdim\pgf@x<\pgf@xa%
+ \let\firstpoint\arrowtipanchor%
+ \let\secondpoint\beforearrowtipanchor%
+ \else%
+ \ifdim\pgf@x<\pgf@xb%
+ \ifdim\pgf@xb<\pgf@xa%
+ \let\firstpoint\arrowtipanchor%
+ \let\secondpoint\beforearrowtipanchor%
+ \else%
+ \let\firstpoint\beforearrowheadanchor%
+ \let\secondpoint\beforearrowtipanchor%
+ \fi%
+ \else%
+ \ifdim\pgf@x<\pgf@xc%
+ \let\firstpoint\beforearrowheadanchor%
+ \let\secondpoint\afterarrowtailanchor%
+ \else%
+ \pgf@xc-\pgf@xc%
+ \advance\pgf@xc360pt\relax%
+ \ifdim\pgf@x<\pgf@xc%
+ \let\firstpoint\afterarrowtailanchor%
+ \pgfsavepgf@process\secondpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\afterarrowtailanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}%
+ }%
+ \else%
+ \pgf@xa-\pgf@xa%
+ \advance\pgf@xa360pt\relax%
+ \pgf@xb-\pgf@xb%
+ \advance\pgf@xb360pt\relax%
+ \ifdim\pgf@x<\pgf@xa%
+ \ifdim\pgf@x<\pgf@xb%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\afterarrowtailanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}%
+ }%
+ \pgfsavepgf@process\secondpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowheadanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}%
+ }%
+ \else%
+ \ifdim\pgf@xb<\pgf@xa%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowheadanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}%
+ }%
+ \else%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\arrowtipanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}%
+ }%
+ \fi%
+ \pgfsavepgf@process\secondpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowtipanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}%
+ }%
+ \fi%
+ \else%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowtipanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}%
+ }%
+ \let\secondpoint\arrowtipanchor%
+ \fi%
+ \fi%
+ \fi%
+ \fi%
+ \fi%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfmathrotatepointaround{\firstpoint}{\centerpoint}{\rotate}%
+ }%
+ \pgfsavepgf@process\secondpoint{%
+ \pgfmathrotatepointaround{\secondpoint}{\centerpoint}{\rotate}%
+ }%
+ \pgfpointintersectionoflines{\referencepoint}{\externalpoint}%
+ {\firstpoint}{\secondpoint}%
+ }%
+}
+
+
+
+
+
+
+
+% keys for shape double arrow
+%
+% /pgf/double arrow tip angle
+% /pgf/double arrow head sep
+
+\pgfkeys{/pgf/.cd,
+ double arrow tip angle/.initial=90,
+ double arrow head extend/.initial=.25cm,
+ double arrow head indent/.initial=0cm}
+
+% Shape double arrow
+%
+%
+\pgfdeclareshape{double arrow}{%
+ \savedmacro\getdoublearrowpoints{%
+ %
+ % Get the outer sep.
+ %
+ \pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/outer xsep}}%
+ \edef\xoutersep{\the\pgf@x}%
+ \pgfmathsetlength\pgf@y{\pgfkeysvalueof{/pgf/outer ysep}}%
+ \edef\youtersep{\the\pgf@y}%
+ %
+ % Get the node dimensions.
+ %
+ \pgfmathsetlength\pgf@xa{\pgfkeysvalueof{/pgf/inner xsep}}%
+ \advance\pgf@xa.5\wd\pgfnodeparttextbox%
+ \advance\pgf@xa.5\pgflinewidth%
+ \pgfmathsetlength\pgf@ya{\pgfkeysvalueof{/pgf/inner ysep}}%
+ \advance\pgf@ya.5\ht\pgfnodeparttextbox%
+ \advance\pgf@ya.5\dp\pgfnodeparttextbox%
+ \advance\pgf@ya.5\pgflinewidth%
+ \ifpgfshapeborderusesincircle%
+ \ifdim\pgf@xa<\pgf@ya%
+ \pgf@xa\pgf@ya%
+ \fi%
+ \pgf@xa1.41421\pgf@xa%
+ \pgf@ya\pgf@xa%
+ \pgfmathsetmacro\rotate{\pgfkeysvalueof{/pgf/shape border rotate}}%
+ \ifdim\xoutersep>\youtersep\relax%
+ \let\youtersep\xoutersep%
+ \else%
+ \let\xoutersep\youtersep%
+ \fi%
+ \else%
+ %
+ % Round the rotation.
+ %
+ \pgfmathsetmacro\rotate{\pgfkeysvalueof{/pgf/shape border rotate}}
+ \pgfmathmod@{\rotate}{360}%
+ \afterassignment\pgfmath@gobbletilpgfmath@%
+ \expandafter\c@pgf@counta\pgfmathresult\relax\pgfmath@%
+ \advance\c@pgf@counta45\relax%
+ \divide\c@pgf@counta90\relax%
+ \multiply\c@pgf@counta90\relax%
+ \ifnum\c@pgf@counta<0\relax%
+ \advance\c@pgf@counta360\relax%
+ \fi%
+ \edef\rotate{\the\c@pgf@counta}%
+ %
+ % Calculate the width and height of the node
+ % contents, according to any border rotation.
+ %
+ \ifnum\c@pgf@counta=90\relax%
+ \pgf@x\pgf@xa%
+ \pgf@xa\pgf@ya%
+ \pgf@ya\pgf@x%
+ \let\pgfmathresult\xoutersep%
+ \let\xoutersep\youtersep%
+ \let\youtersep\pgfmathresult%
+ \else%
+ \ifnum\c@pgf@counta=270\relax%
+ \pgf@x\pgf@xa%
+ \pgf@xa\pgf@ya%
+ \pgf@ya\pgf@x%
+ \let\pgfmathresult\xoutersep%
+ \let\xoutersep\youtersep%
+ \let\youtersep\pgfmathresult%
+ \fi%
+ \fi%
+ \fi%
+ \addtosavedmacro\rotate%
+ %
+ % Get some useful trig stuff.
+ %
+ \pgfmathdivide{\pgfkeysvalueof{/pgf/double arrow tip angle}}{2}%
+ \let\halftipangle\pgfmathresult%
+ \pgfmathcosec@{\halftipangle}%
+ \let\cosechalftipangle\pgfmathresult%
+ \pgfmathcos@{\halftipangle}%
+ \pgfutil@tempdima\pgfmathresult pt\relax%
+ \pgfutil@tempdima\cosechalftipangle\pgfutil@tempdima%
+ \edef\cothalftipangle{\pgfmath@tonumber{\pgfutil@tempdima}}%
+ \pgfmathreciprocal@{\pgfmathresult}%
+ \let\sechalftipangle\pgfmathresult%
+ \pgfmathsin@{\halftipangle}%
+ \pgfutil@tempdima\pgfmathresult pt\relax%
+ \pgfutil@tempdima\sechalftipangle\pgfutil@tempdima%
+ \edef\tanhalftipangle{\pgfmath@tonumber{\pgfutil@tempdima}}%
+ %
+ % Get the double arrow head extend, and adjust for minimum width.
+ %
+ \pgf@xb\pgf@ya%
+ \pgf@xb\cothalftipangle\pgf@xb%
+ \pgfmathsetlength\pgf@xc{\pgfkeysvalueof{/pgf/double arrow head extend}}%
+ \pgf@yc\pgf@xc%
+ \advance\pgf@xc\pgf@ya%
+ \pgfmathsetlength\pgfutil@tempdimb{\pgfkeysvalueof{/pgf/minimum width}}%
+ \ifdim\pgf@xc<.5\pgfutil@tempdimb%
+ \pgfutil@tempdimb.5\pgfutil@tempdimb%
+ \pgfmathdivide@{\pgfmath@tonumber{\pgfutil@tempdimb}}{\pgfmath@tonumber{\pgf@xc}}%
+ \pgf@ya\pgfmathresult\pgf@ya%
+ \pgf@xc\pgfmathresult\pgf@xc%
+ \pgf@yc\pgfmathresult\pgf@yc%
+ \pgf@xb\pgfmathresult\pgf@xb%
+ \fi%
+ %
+ % Now calculate the height of the arrow and adjust for minimum height.
+ %
+ \advance\pgf@xc-\pgf@ya%
+ \pgf@xc\cothalftipangle\pgf@xc%
+ \advance\pgf@xa\pgf@xb%
+ \pgf@xa2.0\pgf@xa%
+ \pgfmathsetlength\pgfutil@tempdimb{\pgfkeysvalueof{/pgf/minimum height}}%
+ \ifdim\pgf@xa<\pgfutil@tempdimb%
+ \pgf@xa\pgfutil@tempdimb%
+ \fi%
+ \pgf@xa.5\pgf@xa%
+ \advance\pgf@xa-\pgf@xb%
+ \pgfmathsetlength\pgfutil@tempdima{\pgfkeysvalueof{/pgf/double arrow head indent}}%
+ %
+ % Now:
+ %
+ % xa - .5 * width of the node minus xb.
+ % ya - .5 * height of the node contents.
+ % xb - distance from the end of the node contents to the arrow tip.
+ % xc - distance from the end of the node contents to the back end of the arrow head.
+ % yc - distance from the top of the node contents to the top end of the arrow head.
+ %
+ \pgfsavepgf@process\centerpoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgf@y.5\ht\pgfnodeparttextbox%
+ \advance\pgf@y-.5\dp\pgfnodeparttextbox%
+ }%
+ \pgfsavepgf@process\basepoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgf@y0pt%
+ }%
+ \pgfsavepgf@process\midpoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgfmathsetlength\pgf@y{+.5ex}%
+ }%
+ %
+ % As the arrow is symmetrical it can be described by only 3 points:
+ %
+ \pgfsavepgf@process\arrowtip{%
+ \pgf@x\pgf@xa%
+ \advance\pgf@x\pgf@xb%
+ \pgf@y0pt\relax%
+ }%
+ \pgfsavepgf@process\beforearrowtip{%
+ \pgf@x\pgf@xa%
+ \advance\pgf@x-\pgf@xc%
+ \pgf@y\pgf@ya%
+ \advance\pgf@y\pgf@yc%
+ }%
+ \pgfsavepgf@process\beforearrowhead{%
+ \pgf@x\pgf@xa%
+ \advance\pgf@x-\pgf@xc%
+ \advance\pgf@x\pgfutil@tempdima%
+ \pgf@y\pgf@ya%
+ }%
+ %
+ % Calculate the anchor point at the arrow tip.
+ %
+ \pgfsavepgf@process\arrowtipanchor{%
+ \pgfpointadd{\centerpoint}{\arrowtip}%
+ \pgf@xa\xoutersep\relax%
+ \advance\pgf@x\cosechalftipangle\pgf@xa%
+ }%
+ \advance\pgf@x.5\wd\pgfnodeparttextbox%
+ \edef\externalradius{\the\pgf@x}%
+ \addtosavedmacro\externalradius%
+ %
+ %
+ \pgfmathanglebetweenlines{\beforearrowtip}{\beforearrowhead}{\beforearrowtip}{\arrowtip}%
+ \pgf@xa\xoutersep\relax%
+ \pgfutil@tempdima\pgfmathresult pt\relax%
+ \pgfutil@tempdima.5\pgfutil@tempdima%
+ \pgfmathcosec@{\pgfmath@tonumber{\pgfutil@tempdima}}%
+ \pgf@xa\pgfmathresult\pgf@xa%
+ \pgfutil@tempdima-\pgfutil@tempdima%
+ \advance\pgfutil@tempdima180pt\relax%
+ \advance\pgfutil@tempdima-\halftipangle pt\relax%
+ \pgfsavepgf@process\beforearrowtipanchor{%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgf@xa}%
+ \pgf@xb\pgf@x%
+ \pgf@yb\pgf@y%
+ \pgf@process{\pgfpointadd{\centerpoint}{\beforearrowtip}}%
+ \advance\pgf@x\pgf@xb%
+ \advance\pgf@y\pgf@yb%
+ }%
+ \pgfmathanglebetweenpoints{\beforearrowhead}{\beforearrowtip}%
+ \pgfutil@tempdima-\pgfmathresult pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdima.5\pgfutil@tempdima%
+ \pgfmathcosec@{\pgfmath@tonumber{\pgfutil@tempdima}}%
+ \pgf@xa\xoutersep\relax%
+ \pgf@xa\pgfmathresult\pgf@xa%
+ \pgfutil@tempdima-\pgfutil@tempdima%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfsavepgf@process\beforearrowheadanchor{%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgf@xa}%
+ \pgf@xb\pgf@x%
+ \pgf@yb\pgf@y%
+ \pgf@process{\pgfpointadd{\centerpoint}{\beforearrowhead}}%
+ \advance\pgf@x\pgf@xb%
+ \advance\pgf@y\pgf@yb%
+ }%
+ %
+ \pgfmathanglebetweenpoints{\centerpoint}{\beforearrowtipanchor}%
+ \let\center@angle@beforearrowtip\pgfmathresult%
+ \addtosavedmacro\center@angle@beforearrowtip%
+ %
+ \pgfmathanglebetweenpoints{\midpoint}{\beforearrowtipanchor}%
+ \let\mid@angle@beforearrowtip\pgfmathresult%
+ \addtosavedmacro\mid@angle@beforearrowtip%
+ %
+ \pgfmathanglebetweenpoints{\basepoint}{\beforearrowtipanchor}%
+ \let\base@angle@beforearrowtip\pgfmathresult%
+ \addtosavedmacro\base@angle@beforearrowtip%
+ %
+ \addtosavedmacro\arrowtipanchor%
+ \addtosavedmacro\beforearrowtipanchor%
+ \addtosavedmacro\beforearrowheadanchor%
+ }
+ \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{+0.5ex}%
+ }%
+ \savedanchor\basepoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgf@y0pt%
+ }%
+ \anchor{center}{\centerpoint}%
+ \anchor{mid}{\midpoint}%
+ \anchor{mid east}{%
+ \getdoublearrowpoints%
+ \let\pgf@singlearrow@referencepoint\midpoint%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{\externalradius}{0pt}}%
+ }
+ \anchor{mid west}{%
+ \getdoublearrowpoints%
+ \let\pgf@singlearrow@referencepoint\midpoint%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{-\externalradius}{0pt}}%
+ }
+ \anchor{base}{\basepoint}%
+ \anchor{base east}{%
+ \getdoublearrowpoints%
+ \let\pgf@singlearrow@referencepoint\basepoint%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{\externalradius}{0pt}}%
+ }
+ \anchor{base west}{%
+ \getdoublearrowpoints%
+ \let\pgf@singlearrow@referencepoint\basepoint%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{-\externalradius}{0pt}}%
+ }
+ \anchor{north}{%
+ \getdoublearrowpoints%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{0pt}{\externalradius}}%
+ }
+ \anchor{south}{%
+ \getdoublearrowpoints%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{0pt}{-\externalradius}}%
+ }
+ \anchor{east}{%
+ \getdoublearrowpoints%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{\externalradius}{0pt}}%
+ }
+ \anchor{west}{%
+ \getdoublearrowpoints%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{-\externalradius}{0pt}}%
+ }
+ \anchor{north east}{%
+ \getdoublearrowpoints%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{\externalradius}{\externalradius}}%
+ }
+ \anchor{south east}{%
+ \getdoublearrowpoints%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{\externalradius}{-\externalradius}}%
+ }
+ \anchor{south west}{%
+ \getdoublearrowpoints%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{-\externalradius}{-\externalradius}}%
+ }
+ \anchor{north west}{%
+ \getdoublearrowpoints%
+ \csname pgf@anchor@double arrow@border\endcsname{\pgfqpoint{-\externalradius}{\externalradius}}%
+ }
+ \anchor{before head 1}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{\beforearrowheadanchor}{\centerpoint}{\rotate}%
+ }%
+ \anchor{before tip 1}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{\beforearrowtipanchor}{\centerpoint}{\rotate}%
+ }%
+ \anchor{tip 1}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{\arrowtipanchor}{\centerpoint}{\rotate}%
+ }%
+ \anchor{after tip 1}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowtipanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }
+ \anchor{after head 1}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowheadanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }
+ \anchor{before head 2}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowheadanchor}%
+ \pgf@x-\pgf@x%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }%
+ \anchor{before tip 2}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowtipanchor}%
+ \pgf@x-\pgf@x%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }%
+ \anchor{tip 2}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\arrowtipanchor}%
+ \pgf@x-\pgf@x%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }%
+ \anchor{after tip 2}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowtipanchor}%
+ \pgf@x-\pgf@x%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }
+ \anchor{after head 2}{%
+ \getdoublearrowpoints%
+ \pgfmathrotatepointaround{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowheadanchor}%
+ \pgf@x-\pgf@x%
+ }{\centerpoint}}%
+ {\centerpoint}{\rotate}%
+ }
+ \backgroundpath{%
+ {%
+ \pgftransformshift{\centerpoint}%
+ \pgftransformrotate{\rotate}%
+ \pgfpathmoveto{\arrowtip}%
+ \pgfpathlineto{\beforearrowtip}%
+ \pgfpathlineto{\beforearrowhead}%
+ \pgfpathlineto{\beforearrowhead\pgf@x-\pgf@x}%
+ \pgfpathlineto{\beforearrowtip\pgf@x-\pgf@x}%
+ \pgfpathlineto{\arrowtip\pgf@x-\pgf@x}%
+ \pgfpathlineto{\beforearrowtip\pgf@x-\pgf@x\pgf@y-\pgf@y}%
+ \pgfpathlineto{\beforearrowhead\pgf@x-\pgf@x\pgf@y-\pgf@y}%
+ \pgfpathlineto{\beforearrowhead\pgf@y-\pgf@y}%
+ \pgfpathlineto{\beforearrowtip\pgf@y-\pgf@y}%
+ }%
+ \pgfpathclose%
+ }%
+ \anchorborder{%
+ \pgfsavepgf@process\externalpoint{}%
+ \getdoublearrowpoints%
+ \pgfutil@ifundefined{pgf@singlearrow@referencepoint}{\let\referencepoint\centerpoint}%
+ {\let\referencepoint\pgf@singlearrow@referencepoint}%
+ \pgfsavepgf@process\externalpoint{%
+ \externalpoint%
+ \pgf@xa\pgf@x%
+ \pgf@ya\pgf@y%
+ \referencepoint%
+ \advance\pgf@x\pgf@xa%
+ \advance\pgf@y\pgf@ya}%
+ \pgfmathanglebetweenpoints{\centerpoint}{\externalpoint}%
+ \pgfmathsubtract@{\pgfmathresult}{\rotate}%
+ \ifdim\pgfmathresult pt<0pt\relax%
+ \pgfmathadd@{\pgfmathresult}{360}%
+ \fi%
+ \let\externalangle\pgfmathresult%
+ \pgf@x\externalangle pt\relax%
+ \ifx\referencepoint\midpoint%
+ \pgf@xa\mid@angle@beforearrowtip pt\relax%
+ \else%
+ \ifx\referencepoint\basepoint%
+ \pgf@xa\base@angle@beforearrowtip pt\relax%
+ \else%
+ \pgf@xa\center@angle@beforearrowtip pt\relax%
+ \fi%
+ \fi%
+ \ifdim\pgf@x<180pt\relax%
+ \ifdim\pgf@x<\pgf@xa%
+ \let\firstpoint\arrowtipanchor%
+ \let\secondpoint\beforearrowtipanchor%
+ \else%
+ \pgf@xa-\pgf@xa%
+ \advance\pgf@xa180pt\relax%
+ \ifdim\pgf@x<\pgf@xa%
+ \let\firstpoint\beforearrowheadanchor%
+ \pgfsavepgf@process\secondpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowheadanchor}%
+ \pgf@x-\pgf@x
+ }{\centerpoint}}%
+ \else%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowtipanchor}%
+ \pgf@x-\pgf@x
+ }{\centerpoint}}%
+ \pgfsavepgf@process\secondpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\arrowtipanchor}%
+ \pgf@x-\pgf@x%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ \fi%
+ \fi%
+ \else%
+ \pgf@xa-\pgf@xa%
+ \advance\pgf@xa360pt\relax%
+ \ifdim\pgf@x<\pgf@xa%
+ \pgf@xa-\pgf@xa%
+ \advance\pgf@xa540pt\relax%
+ \ifdim\pgf@x<\pgf@xa%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\arrowtipanchor}%
+ \pgf@x-\pgf@x%
+ }{\centerpoint}}%
+ \pgfsavepgf@process\secondpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowtipanchor}%
+ \pgf@x-\pgf@x%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ \else%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowheadanchor}%
+ \pgf@x-\pgf@x%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ \pgfsavepgf@process\secondpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\centerpoint}{\beforearrowheadanchor}%
+ \pgf@y-\pgf@y%
+ }{\centerpoint}}%
+ \fi%
+ \else%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfpointadd{%
+ \pgfpointdiff{\beforearrowtipanchor}{\centerpoint}%
+ \pgf@x-\pgf@x%
+ }{\centerpoint}}%
+ \let\secondpoint\arrowtipanchor%
+ \fi%
+ \fi%
+ \pgfsavepgf@process\firstpoint{%
+ \pgfmathrotatepointaround{\firstpoint}{\centerpoint}{\rotate}%
+ }%
+ \pgfsavepgf@process\secondpoint{%
+ \pgfmathrotatepointaround{\secondpoint}{\centerpoint}{\rotate}%
+ }%
+ \pgfpointintersectionoflines{\referencepoint}{\externalpoint}%
+ {\firstpoint}{\secondpoint}%
+ }%
+}
+
+
+
+
+%
+% Internal macros for the arrow box/shape.
+%
+\def\pgf@lib@arrowbox@parsearrowlength#1#2#3{%
+ \edef\pgf@lib@temp{#3}%
+ \edef\pgf@lib@marshal{%
+ \noexpand\pgfutil@in@{none}{\pgf@lib@temp}%
+ }%
+ \pgf@lib@marshal%
+ \ifpgfutil@in@%
+ #10pt\relax%
+ \else%
+ \afterassignment\pgfmath@gobbletilpgfmath@%
+ \expandafter#1\pgf@lib@temp\relax\pgfmath@%
+ %
+ \edef\pgf@lib@marshal{%
+ \noexpand\pgfutil@in@{from center}{\pgf@lib@temp}%
+ }%
+ \pgf@lib@marshal%
+ \ifpgfutil@in@%
+ \else%
+ \ifdim#1>0pt\relax%
+ \advance#1#2\relax%
+ \fi%
+ \fi%
+ \fi}
+
+\def\pgf@lib@arrowbox@parsearrows#1{%
+ \pgfkeys{/pgf/.cd,%
+ arrow box west arrow=0pt,
+ arrow box east arrow=0pt,
+ arrow box south arrow=0pt,
+ arrow box north arrow=0pt
+ }%
+ \def\pgf@lib@arrowbox@extend{0pt}%
+ \edef\pgf@lib@temp{#1}%
+ \expandafter\pgf@lib@arrowbox@@parsearrows\pgf@lib@temp,\pgf@lib@arrowbox@parsearrows,}
+
+
+\def\pgf@lib@arrowbox@@parsearrows#1,{%
+ \ifx\pgf@lib@arrowbox@parsearrows#1%
+ \let\pgflib@next\relax%
+ \else%
+ \pgfutil@in@:{#1}%
+ \ifpgfutil@in@%
+ \pgf@lib@arrowbox@getextend#1\pgf@lib%
+ \else%
+ \def\pgf@lib@arrowbox@direction{#1}%
+ \fi%
+ \edef\pgf@marshal{%
+ \noexpand\pgfkeys{/pgf/arrow box \pgf@lib@arrowbox@direction\space arrow=\pgf@lib@arrowbox@extend}%
+ }%
+ \pgf@marshal%
+ \let\pgflib@next\pgf@lib@arrowbox@@@parsearrows%
+ \fi%
+ \pgflib@next%
+}
+\def\pgf@lib@arrowbox@@@parsearrows{%
+ \pgfutil@ifnextchar x{\relax\pgf@lib@arrowbox@@parsearrows}{\relax\pgf@lib@arrowbox@@parsearrows}%
+}
+
+\def\pgf@lib@arrowbox@getextend#1:#2\pgf@lib{%
+ \def\pgf@lib@arrowbox@direction{#1}%
+ \def\pgf@lib@arrowbox@extend{#2}%
+}%
+
+%
+% /pgf/arrow box north arrow
+% /pgf/arrow box south arrow
+% /pgf/arrow box west arrow
+% /pgf/arrow box east arrow
+% /pgf/arrow box arrows
+% /pgf/arrow box shaft width
+% /pgf/arrow box head extend
+% /pgf/arrow box head indent
+% /pgf/arrow box tip angle
+%
+\pgfkeys{/pgf/.cd,
+ arrow box west arrow/.initial=.5cm,
+ arrow box east arrow/.initial=.5cm,
+ arrow box south arrow/.initial=.5cm,
+ arrow box north arrow/.initial=.5cm,
+ arrow box shaft width/.initial=.125cm,
+ arrow box head extend/.initial=.125cm,
+ arrow box head indent/.initial=0cm,
+ arrow box tip angle/.initial=90,
+}
+
+%
+% arrow box/Shape.
+%
+\pgfdeclareshape{arrow box}{%
+ \saveddimen\shaftwidth{%
+ \pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/arrow box shaft width}}%
+ }%
+ %
+ % Calculate far the arrows extend from the center of the node.
+ %
+ \savedmacro\arrowboxpoints{%
+ \pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/inner xsep}}%
+ \advance\pgf@x.5\wd\pgfnodeparttextbox%
+ \pgfmathsetlength\pgf@xa{\pgfkeysvalueof{/pgf/minimum width}}%
+ \ifdim\pgf@x<.5\pgf@xa%
+ \pgf@x.5\pgf@xa%
+ \fi%
+ \pgfmathaddtolength\pgf@x{\pgfkeysvalueof{/pgf/outer xsep}}%
+ %
+ \pgfmathsetlength\pgf@y{\pgfkeysvalueof{/pgf/inner ysep}}%
+ \advance\pgf@y.5\ht\pgfnodeparttextbox%
+ \advance\pgf@y.5\dp\pgfnodeparttextbox%
+ \pgfmathsetlength\pgf@ya{\pgfkeysvalueof{/pgf/minimum height}}%
+ \ifdim\pgf@y<.5\pgf@ya%
+ \pgf@y.5\pgf@ya%
+ \fi%
+ \pgfmathaddtolength\pgf@y{\pgfkeysvalueof{/pgf/outer ysep}}%
+ %
+ \edef\halfboxwidth{\the\pgf@x}%
+ \edef\halfboxheight{\the\pgf@y}%
+ \pgfextract@process\arrowboxcorner{}%
+ \addtosavedmacro\arrowboxcorner%
+ %
+ \pgf@lib@arrowbox@parsearrowlength\pgf@x{\halfboxwidth}%
+ {\pgfkeysvalueof{/pgf/arrow box west arrow}}%
+ \edef\westextend{\the\pgf@x}%
+ \addtosavedmacro\westextend%
+ %
+ \pgf@lib@arrowbox@parsearrowlength\pgf@x{\halfboxwidth}%
+ {\pgfkeysvalueof{/pgf/arrow box east arrow}}%
+ \edef\eastextend{\the\pgf@x}%
+ \addtosavedmacro\eastextend%
+ %
+ \pgf@lib@arrowbox@parsearrowlength\pgf@x{\halfboxheight}%
+ {\pgfkeysvalueof{/pgf/arrow box north arrow}}%
+ \edef\northextend{\the\pgf@x}%
+ \addtosavedmacro\northextend%
+ %
+ \pgf@lib@arrowbox@parsearrowlength\pgf@x{\halfboxheight}%
+ {\pgfkeysvalueof{/pgf/arrow box south arrow}}%
+ \edef\southextend{\the\pgf@x}%
+ \addtosavedmacro\southextend%
+ }%
+ \saveddimen\arrowheadextend{%
+ \pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/arrow box head extend}}%
+ }%
+ \saveddimen\arrowheadindent{%
+ \pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/arrow box head indent}}%
+ }%
+ %
+ % Calculate the `miter' angle for the outer sep at the arrow tip.
+ %
+ \savedmacro\arrowtipmiterangle{%
+ \pgfmathparse{\pgfkeysvalueof{/pgf/arrow box tip angle}}%
+ \pgfmathdivide@{\pgfmathresult}{2}%
+ \let\arrowtipmiterangle\pgfmathresult%
+ }%
+ %
+ % Calculate the `miter' angle for the outer sep at the point just
+ % before the arrow tip.
+ %
+ \savedmacro\arrowheadangles{%
+ %
+ % Calculate the `miter' angle and its cosecant at the arrow tip...
+ %
+ \pgfmathparse{\pgfkeysvalueof{/pgf/arrow box tip angle}}%
+ \pgfmathdivide@{\pgfmathresult}{2}%
+ \let\arrowtipmiterangle\pgfmathresult%
+ \addtosavedmacro\arrowtipmiterangle%
+ \pgfmathcosec@{\arrowtipmiterangle}%
+ \let\cosecarrowtipmiterangle\pgfmathresult%
+ \addtosavedmacro\cosecarrowtipmiterangle%
+ %
+ % ...before the arrow head...
+ %
+ \pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/arrow box head extend}}%
+ \pgfmathsetlength\pgf@y{\pgfkeysvalueof{/pgf/arrow box head indent}}%
+ \ifdim\pgf@y=0pt\relax%
+ \def\pgfmathresult{90}%
+ \else%
+ \ifdim\pgf@y<0pt\relax%
+ \pgfmathdivide@{\pgfmath@tonumber{\pgf@x}}{\pgfmath@tonumber{\pgf@y}}%
+ \pgfmathatan@{\pgfmathresult}%
+ \pgfmathadd@{\pgfmathresult}{180}%
+ \else%
+ \pgfmathdivide@{\pgfmath@tonumber{\pgf@x}}{\pgfmath@tonumber{\pgf@y}}%
+ \pgfmathatan@{\pgfmathresult}%
+ \fi%
+ \fi%
+ \pgfmathdivide@{\pgfmathresult}{2}%
+ \let\beforearrowheadmiterangle\pgfmathresult%
+ \addtosavedmacro\beforearrowheadmiterangle%
+ \pgfmathcosec@{\beforearrowheadmiterangle}%
+ \let\cosecbeforearrowheadmiterangle\pgfmathresult%
+ \addtosavedmacro\cosecbeforearrowheadmiterangle%
+ %
+ % ...and before the arrow tip.
+ %
+ \pgfutil@tempdima-\arrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima90pt\relax%
+ \pgfutil@tempdimb\beforearrowheadmiterangle pt\relax%
+ \pgfutil@tempdimb2.0\pgfutil@tempdimb%
+ \advance\pgfutil@tempdimb-90pt\relax%
+ \advance\pgfutil@tempdima\pgfutil@tempdimb%
+ \divide\pgfutil@tempdima2\relax%
+ \edef\beforearrowtipmiterangle{\pgfmath@tonumber{\pgfutil@tempdima}}%
+ \addtosavedmacro\beforearrowtipmiterangle%
+ \pgfmathcosec@{\beforearrowtipmiterangle}%
+ \let\cosecbeforearrowtipmiterangle\pgfmathresult%
+ \addtosavedmacro\cosecbeforearrowtipmiterangle%
+ }
+ \saveddimen\outerxsep{%
+ \pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/outer xsep}}%
+ }%
+ \saveddimen\outerysep{%
+ \pgfmathsetlength\pgf@x{\pgfkeysvalueof{/pgf/outer ysep}}%
+ }%
+ %
+ % Calculate the (path) point immediately prior to an arrow tip.
+ %
+ \savedanchor\beforearrowtip{%
+ \pgfmathparse{\pgfkeysvalueof{/pgf/arrow box tip angle}}%
+ \pgfmathdivide@{\pgfmathresult}{2}%
+ \pgfmathcot@{\pgfmathresult}%
+ \let\cothalfangle\pgfmathresult%
+ \pgfmathsetlength\pgf@y{\pgfkeysvalueof{/pgf/arrow box shaft width}}%
+ \pgf@y.5\pgf@y%
+ \pgfmathaddtolength\pgf@y{\pgfkeysvalueof{/pgf/arrow box head extend}}%
+ \pgf@y\pgf@y%
+ \pgf@x\cothalfangle\pgf@y%
+ }%
+ \savedanchor\centerpoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgf@y.5\ht\pgfnodeparttextbox%
+ \advance\pgf@y-.5\dp\pgfnodeparttextbox%
+ }%
+ \savedanchor\basepoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgf@y0pt\relax%
+ }%
+ \savedanchor\midpoint{%
+ \pgf@x.5\wd\pgfnodeparttextbox%
+ \pgfmathsetlength\pgf@y{+.5ex}%
+ }%
+ \anchor{center}{\centerpoint}
+ \anchor{mid}{\midpoint}
+ \anchor{mid east}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \let\pgf@lib@shapes@arrowbox@referencepoint\midpoint%
+ \csname pgf@anchor@arrow box@border\endcsname{\pgfqpoint{\eastextend}{0pt}};
+ \else%
+ \arrowboxcorner%
+ \pgf@xa\pgf@x%
+ \midpoint%
+ \advance\pgf@x\pgf@xa%
+ \fi%
+ }
+ \anchor{mid west}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \let\pgf@lib@shapes@arrowbox@referencepoint\midpoint%
+ \csname pgf@anchor@arrow box@border\endcsname{\pgfqpoint{-\westextend}{0pt}};
+ \else%
+ \arrowboxcorner%
+ \pgf@xa\pgf@x%
+ \midpoint%
+ \advance\pgf@x-\pgf@xa%
+ \fi%
+ }
+ \anchor{base}{\basepoint}
+ \anchor{base east}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \let\pgf@lib@shapes@arrowbox@referencepoint\basepoint%
+ \csname pgf@anchor@arrow box@border\endcsname{\pgfqpoint{\eastextend}{0pt}};
+ \else%
+ \arrowboxcorner%
+ \pgf@xa\pgf@x%
+ \basepoint%
+ \advance\pgf@x\pgf@xa%
+ \fi%
+ }
+ \anchor{base west}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \let\pgf@lib@shapes@arrowbox@referencepoint\basepoint%
+ \csname pgf@anchor@arrow box@border\endcsname{\pgfqpoint{-\westextend}{0pt}};
+ \else%
+ \arrowboxcorner%
+ \pgf@xa\pgf@x%
+ \basepoint%
+ \advance\pgf@x-\pgf@xa%
+ \fi%
+ }
+ \anchor{north}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \csname pgf@anchor@arrow box@north arrow tip\endcsname%
+ \else%
+ \pgfpointadd{\centerpoint}{\arrowboxcorner}%
+ \pgf@ya\pgf@y%
+ \centerpoint%
+ \pgf@y\pgf@ya%
+ \fi%
+ }%
+ \anchor{south}{%
+ \arrowboxpoints%
+ \ifdim\southextend>0pt\relax%
+ \csname pgf@anchor@arrow box@south arrow tip\endcsname%
+ \else%
+ \pgfpointadd{\centerpoint}{\arrowboxcorner\pgf@y-\pgf@y}%
+ \pgf@ya\pgf@y%
+ \centerpoint%
+ \pgf@y\pgf@ya%
+ \fi%
+ }%
+ \anchor{east}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \csname pgf@anchor@arrow box@east arrow tip\endcsname%
+ \else%
+ \pgfpointadd{\centerpoint}{\arrowboxcorner}%
+ \pgf@xa\pgf@x%
+ \centerpoint%
+ \pgf@x\pgf@xa%
+ \fi%
+ }%
+ \anchor{west}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \csname pgf@anchor@arrow box@west arrow tip\endcsname%
+ \else%
+ \pgfpointadd{\centerpoint}{\arrowboxcorner\pgf@x-\pgf@x}%
+ \pgf@xa\pgf@x%
+ \centerpoint%
+ \pgf@x\pgf@xa%
+ \fi%
+ }%
+ \anchor{north east}{%
+ \arrowboxpoints%
+ \pgfpointadd{\centerpoint}{\arrowboxcorner}%
+ }%
+ \anchor{north west}{%
+ \arrowboxpoints%
+ \pgfpointadd{\centerpoint}{\arrowboxcorner\pgf@x-\pgf@x}%
+ }%
+ \anchor{south west}{%
+ \arrowboxpoints%
+ \pgfpointadd{\centerpoint}{\arrowboxcorner\pgf@x-\pgf@x\pgf@y-\pgf@y}%
+ }%
+ \anchor{south east}{%
+ \arrowboxpoints%
+ \pgfpointadd{\centerpoint}{\arrowboxcorner\pgf@y-\pgf@y}%
+ }%
+ \anchor{before east arrow}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \arrowboxcorner%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ \advance\pgf@y\outerysep\relax%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@east\endcsname%
+ \fi%
+ }%
+ \anchor{before east arrow head}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\beforearrowheadmiterangle pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdimb\outerxsep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowheadmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\eastextend\relax%
+ \advance\pgf@x\arrowheadindent\relax%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ }%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@east\endcsname%
+ \fi%
+ }
+ \anchor{before east arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\arrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima-\beforearrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdimb\outerysep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowtipmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\eastextend\relax%
+ }%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@east\endcsname%
+ \fi%
+ }
+ \anchor{east arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \centerpoint%
+ \advance\pgf@x\eastextend\relax%
+ \pgf@xa\outerxsep\relax%
+ \pgfmathcosec@{\arrowtipmiterangle}%
+ \advance\pgf@x\pgfmathresult\pgf@xa%
+ \else%
+ \csname pgf@anchor@arrow box@east\endcsname%
+ \fi%
+ }
+ \anchor{after east arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\arrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima-\beforearrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdimb\outerysep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowtipmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\eastextend\relax%
+ }%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@east\endcsname%
+ \fi%
+ }
+ \anchor{after east arrow head}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\beforearrowheadmiterangle pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdimb\outerxsep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowheadmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\eastextend\relax%
+ \advance\pgf@x\arrowheadindent\relax%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ }%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@east\endcsname%
+ \fi%
+ }
+ \anchor{after east arrow}{%
+ \arrowboxpoints%
+ \ifdim\eastextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \arrowboxcorner%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ \advance\pgf@y\outerysep\relax%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@east\endcsname%
+ \fi%
+ }%
+ %
+ \anchor{before west arrow}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \arrowboxcorner%
+ \pgf@x-\pgf@x%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ \advance\pgf@y\outerysep\relax%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@west\endcsname%
+ \fi%
+ }%
+ \anchor{before west arrow head}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\beforearrowheadmiterangle pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdimb\outerxsep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowheadmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\westextend\relax%
+ \advance\pgf@x\arrowheadindent\relax%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ }%
+ \pgf@x-\pgf@x%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@west\endcsname%
+ \fi%
+ }
+ \anchor{before west arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\arrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima-\beforearrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdimb\outerysep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowtipmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\westextend\relax%
+ }%
+ \pgf@x-\pgf@x%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@west\endcsname%
+ \fi%
+ }
+ \anchor{west arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \centerpoint%
+ \advance\pgf@x-\westextend\relax%
+ \pgf@xa\outerxsep\relax%
+ \pgfmathcosec@{\arrowtipmiterangle}%
+ \advance\pgf@x-\pgfmathresult\pgf@xa%
+ \else%
+ \csname pgf@anchor@arrow box@west\endcsname%
+ \fi%
+ }
+ \anchor{after west arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\arrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima-\beforearrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdimb\outerysep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowtipmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\westextend\relax%
+ }%
+ \pgf@x-\pgf@x%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@west\endcsname%
+ \fi%
+ }
+ \anchor{after west arrow head}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\beforearrowheadmiterangle pt\relax%
+ \advance\pgfutil@tempdima180pt\relax%
+ \pgfutil@tempdimb\outerxsep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowheadmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\westextend\relax%
+ \advance\pgf@x\arrowheadindent\relax%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ }%
+ \pgf@x-\pgf@x%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@west\endcsname%
+ \fi%
+ }
+ \anchor{after west arrow}{%
+ \arrowboxpoints%
+ \ifdim\westextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \arrowboxcorner%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ \advance\pgf@y\outerysep\relax%
+ \pgf@x-\pgf@x%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@west\endcsname%
+ \fi%
+ }%
+ %
+ \anchor{before north arrow}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \arrowboxcorner%
+ \pgf@x-\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ \advance\pgf@x-\outerxsep\relax%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@north\endcsname%
+ \fi%
+ }
+ \anchor{before north arrow head}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\beforearrowheadmiterangle pt\relax%
+ \advance\pgfutil@tempdima270pt\relax%
+ \pgfutil@tempdimb\outerysep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowheadmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@y-\pgf@x%
+ \advance\pgf@y\northextend\relax%
+ \advance\pgf@y\arrowheadindent\relax%
+ \pgf@x-\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ }%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@north\endcsname%
+ \fi%
+ }
+ \anchor{before north arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima\arrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima\beforearrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima-90pt\relax%
+ \pgfutil@tempdimb\outerxsep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowtipmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@xa\pgf@x%
+ \pgf@x\pgf@y%
+ \pgf@y-\pgf@xa%
+ \advance\pgf@y\northextend\relax%
+ }%
+ \pgf@x-\pgf@x%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@north\endcsname%
+ \fi%
+ }
+ \anchor{north arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \centerpoint%
+ \advance\pgf@y\northextend\relax%
+ \pgf@ya\outerysep\relax%
+ \pgfmathcosec@{\arrowtipmiterangle}%
+ \advance\pgf@y\pgfmathresult\pgf@ya%
+ \else%
+ \csname pgf@anchor@arrow box@north\endcsname%
+ \fi%
+ }
+ \anchor{after north arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima\arrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima\beforearrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima-90pt\relax%
+ \pgfutil@tempdimb\outerxsep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowtipmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@xa\pgf@x%
+ \pgf@x\pgf@y%
+ \pgf@y-\pgf@xa%
+ \advance\pgf@y\northextend\relax%
+ }%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@north\endcsname%
+ \fi%
+ }
+ \anchor{after north arrow head}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\beforearrowheadmiterangle pt\relax%
+ \advance\pgfutil@tempdima270pt\relax%
+ \pgfutil@tempdimb\outerysep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowheadmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@y-\pgf@x%
+ \advance\pgf@y\northextend\relax%
+ \advance\pgf@y\arrowheadindent\relax%
+ \pgf@x-\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ }%
+ \pgf@x-\pgf@x%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@north\endcsname%
+ \fi%
+ }
+ \anchor{after north arrow}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \arrowboxcorner%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ \advance\pgf@x\outerxsep\relax%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@north\endcsname%
+ \fi%
+ }
+ %
+ \anchor{before south arrow}{%
+ \arrowboxpoints%
+ \ifdim\southextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \arrowboxcorner%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ \advance\pgf@x\outerxsep\relax%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@south\endcsname%
+ \fi%
+ }%
+ \anchor{before south arrow head}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\beforearrowheadmiterangle pt\relax%
+ \advance\pgfutil@tempdima270pt\relax%
+ \pgfutil@tempdimb\outerysep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowheadmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@y-\pgf@x%
+ \advance\pgf@y\northextend\relax%
+ \advance\pgf@y\arrowheadindent\relax%
+ \pgf@x-\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ }%
+ \pgf@x-\pgf@x%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@south\endcsname%
+ \fi%
+ }
+ \anchor{before south arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima\arrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima\beforearrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima-90pt\relax%
+ \pgfutil@tempdimb\outerxsep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowtipmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@xa\pgf@x%
+ \pgf@x\pgf@y%
+ \pgf@y-\pgf@xa%
+ \advance\pgf@y\northextend\relax%
+ }%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@south\endcsname%
+ \fi%
+ }
+ \anchor{south arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\southextend>0pt\relax%
+ \centerpoint%
+ \advance\pgf@y-\southextend\relax%
+ \pgf@ya\outerysep\relax%
+ \pgfmathcosec@{\arrowtipmiterangle}%
+ \advance\pgf@y-\pgfmathresult\pgf@ya%
+ \else%
+ \csname pgf@anchor@arrow box@east\endcsname%
+ \fi%
+ }
+ \anchor{after south arrow tip}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima\arrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima\beforearrowtipmiterangle pt\relax%
+ \advance\pgfutil@tempdima-90pt\relax%
+ \pgfutil@tempdimb\outerxsep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowtipmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@xa\pgf@x%
+ \pgf@x\pgf@y%
+ \pgf@y-\pgf@xa%
+ \advance\pgf@y\northextend\relax%
+ }%
+ \pgf@x-\pgf@x%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@south\endcsname%
+ \fi%
+ }
+ \anchor{after south arrow head}{%
+ \arrowboxpoints%
+ \ifdim\northextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \pgfpointadd{%
+ \arrowheadangles%
+ \pgfutil@tempdima-\beforearrowheadmiterangle pt\relax%
+ \advance\pgfutil@tempdima270pt\relax%
+ \pgfutil@tempdimb\outerysep\relax%
+ \pgfutil@tempdimb\cosecbeforearrowheadmiterangle\pgfutil@tempdimb%
+ \pgfqpointpolar{\pgfmath@tonumber{\pgfutil@tempdima}}{\the\pgfutil@tempdimb}%
+ }%
+ {%
+ \beforearrowtip%
+ \pgf@y-\pgf@x%
+ \advance\pgf@y\northextend\relax%
+ \advance\pgf@y\arrowheadindent\relax%
+ \pgf@x-\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ }%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@south\endcsname%
+ \fi%
+ }
+ \anchor{after south arrow}{%
+ \arrowboxpoints%
+ \ifdim\southextend>0pt\relax%
+ \pgfpointadd{\centerpoint}{%
+ \arrowboxcorner%
+ \pgf@x-\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ \advance\pgf@x-\outerxsep\relax%
+ \pgf@y-\pgf@y%
+ }%
+ \else%
+ \csname pgf@anchor@arrow box@south\endcsname%
+ \fi%
+ }%
+ %
+ \backgroundpath{%
+ \arrowboxpoints%
+ \pgfextract@process\arrowboxcorner{%
+ \arrowboxcorner%
+ \pgfmathaddtolength\pgf@x{-\pgfkeysvalueof{/pgf/outer xsep}}%
+ \pgfmathaddtolength\pgf@y{-\pgfkeysvalueof{/pgf/outer ysep}}%
+ }%
+ {%
+ \pgftransformshift{\centerpoint}%
+ \pgfpathmoveto{\arrowboxcorner}%
+ \ifdim\eastextend>0pt\relax%
+ \pgfpathlineto{%
+ \arrowboxcorner%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\eastextend\relax%
+ \advance\pgf@x\arrowheadindent\relax%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\eastextend\relax%
+ }%
+ \pgfpathlineto{%
+ \pgf@x\eastextend\relax%
+ \pgf@y0pt\relax%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\eastextend\relax%
+ \pgf@y-\pgf@y%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@x-\pgf@x%
+ \advance\pgf@x\eastextend\relax%
+ \advance\pgf@x\arrowheadindent\relax%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y-.5\pgf@y%
+ }%
+ \pgfpathlineto{%
+ \arrowboxcorner%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y-.5\pgf@y%
+ }%
+ \fi%
+ \pgfpathlineto{\arrowboxcorner\pgf@y-\pgf@y}%
+ \ifdim\southextend>0pt\relax%
+ \pgfpathlineto{%
+ \arrowboxcorner%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ \pgf@y-\pgf@y%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@y\pgf@x%
+ \advance\pgf@y-\southextend\relax%
+ \advance\pgf@y-\arrowheadindent\relax%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@xa\pgf@y%
+ \pgf@y\pgf@x%
+ \advance\pgf@y-\southextend\relax%
+ \pgf@x\pgf@xa%
+ }%
+ \pgfpathlineto{%
+ \pgf@x0pt\relax%
+ \pgf@y-\southextend\relax%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@xa\pgf@y%
+ \pgf@y\pgf@x%
+ \advance\pgf@y-\southextend\relax%
+ \pgf@x-\pgf@xa%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@y\pgf@x%
+ \advance\pgf@y-\southextend\relax%
+ \advance\pgf@y-\arrowheadindent\relax%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x-.5\pgf@x%
+ }%
+ \pgfpathlineto{%
+ \arrowboxcorner%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x-.5\pgf@x%
+ \pgf@y-\pgf@y%
+ }%
+ \fi%
+ \pgfpathlineto{\arrowboxcorner\pgf@x-\pgf@x\pgf@y-\pgf@y}%
+ \ifdim\westextend>0pt\relax%
+ \pgfpathlineto{%
+ \arrowboxcorner%
+ \pgf@x-\pgf@x
+ \pgf@y\shaftwidth\relax%
+ \pgf@y-.5\pgf@y%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \advance\pgf@x-\westextend\relax%
+ \advance\pgf@x-\arrowheadindent\relax%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y-.5\pgf@y%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \advance\pgf@x-\westextend\relax%
+ \pgf@y-\pgf@y%
+ }%
+ \pgfpathlineto{%
+ \pgf@x-\westextend\relax%
+ \pgf@y0pt\relax%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \advance\pgf@x-\westextend\relax%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \advance\pgf@x-\westextend\relax%
+ \advance\pgf@x-\arrowheadindent\relax%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ }%
+ \pgfpathlineto{%
+ \arrowboxcorner%
+ \pgf@x-\pgf@x%
+ \pgf@y\shaftwidth\relax%
+ \pgf@y.5\pgf@y%
+ }%
+ \fi%
+ \pgfpathlineto{\arrowboxcorner\pgf@x-\pgf@x}%
+ \ifdim\northextend>0pt\relax%
+ \pgfpathlineto{%
+ \arrowboxcorner%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x-.5\pgf@x%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@y-\pgf@x%
+ \advance\pgf@y\northextend\relax%
+ \advance\pgf@y\arrowheadindent\relax%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x-.5\pgf@x%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@xa\pgf@y%
+ \pgf@y-\pgf@x%
+ \advance\pgf@y\northextend\relax%
+ \pgf@x-\pgf@xa%
+ }%
+ \pgfpathlineto{%
+ \pgf@x0pt\relax%
+ \pgf@y\northextend\relax%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@xa\pgf@y%
+ \pgf@y-\pgf@x%
+ \advance\pgf@y\northextend\relax%
+ \pgf@x\pgf@xa%
+ }%
+ \pgfpathlineto{%
+ \beforearrowtip%
+ \pgf@y-\pgf@x%
+ \advance\pgf@y\northextend\relax%
+ \advance\pgf@y\arrowheadindent\relax%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ }%
+ \pgfpathlineto{%
+ \arrowboxcorner%
+ \pgf@x\shaftwidth\relax%
+ \pgf@x.5\pgf@x%
+ }%
+ \fi%
+ \pgfpathclose%
+ }%
+ }
+ \anchorborder{%
+ \pgfextract@process\externalpoint{}%
+ \pgfutil@ifundefined{pgf@lib@shapes@arrowbox@referencepoint}%
+ {\let\referencepoint\centerpoint}{\let\referencepoint\pgf@lib@shapes@arrowbox@referencepoint}%
+ \pgfextract@process\externalpoint{%
+ \pgfpointadd{\referencepoint}{\externalpoint}%
+ }%
+ \pgfmathanglebetweenpoints{\centerpoint}{\externalpoint}%
+ \let\externalangle\pgfmathresult%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@west\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@north\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@north east\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@before east arrow tip\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{east arrow tip}%
+ \def\secondpoint{before east arrow tip}%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@before east arrow\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{before east arrow head}%
+ \def\secondpoint{before east arrow}%
+ \else%
+ \def\firstpoint{before east arrow}%
+ \def\secondpoint{north east}%
+ \fi%
+ \fi%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@after north arrow tip\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@after north arrow\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{north east}%
+ \def\secondpoint{after north arrow}%
+ \else%
+ \def\firstpoint{after north arrow}%
+ \def\secondpoint{after north arrow head}%
+ \fi%
+ \else%
+ \def\firstpoint{after north arrow tip}%
+ \def\secondpoint{north arrow tip}%
+ \fi%
+ \fi%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@north west\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@before north arrow tip\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{north arrow tip}%
+ \def\secondpoint{before north arrow tip}%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@before north arrow\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{before north head}%
+ \def\secondpoint{before north arrow}%
+ \else%
+ \def\firstpoint{before north arrow}%
+ \def\secondpoint{north west}%
+ \fi%
+ \fi%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@after west arrow tip\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@after west arrow\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{north west}%
+ \def\secondpoint{after west arrow}%
+ \else%
+ \def\firstpoint{after west arrow}%
+ \def\secondpoint{after west arrow head}%
+ \fi%
+ \else%
+ \def\firstpoint{after west arrow tip}%
+ \def\secondpoint{west arrow tip}%
+ \fi%
+ \fi%
+ \fi%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@south arrow tip\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@south west\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@before west arrow tip\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{west arrow tip}%
+ \def\secondpoint{before west arrow tip}%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@before west arrow\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{before west arrow head}%
+ \def\secondpoint{before west arrow}%
+ \else%
+ \def\firstpoint{before west arrow}%
+ \def\secondpoint{south west}%
+ \fi%
+ \fi%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@after south arrow tip\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@after south arrow\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{south west}%
+ \def\secondpoint{after south arrow}%
+ \else%
+ \def\firstpoint{after south arrow}%
+ \def\secondpoint{after south arrow head}%
+ \fi%
+ \else%
+ \def\firstpoint{after south arrow tip}%
+ \def\secondpoint{south arrow tip}%
+ \fi%
+ \fi%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@south east\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@before south arrow tip\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{south arrow tip}%
+ \def\secondpoint{before south arrow tip}%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@before south arrow\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{before south arrow head}%
+ \def\secondpoint{before south arrow}%
+ \else%
+ \def\firstpoint{before south arrow}%
+ \def\secondpoint{south east}%
+ \fi%
+ \fi%
+ \else%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@after east arrow tip\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \pgfmathanglebetweenpoints{\referencepoint}%
+ {\csname pgf@anchor@arrow box@after east arrow\endcsname}%
+ \ifdim\externalangle pt<\pgfmathresult pt\relax%
+ \def\firstpoint{south east}%
+ \def\secondpoint{after east arrow}%
+ \else%
+ \def\firstpoint{after east arrow}%
+ \def\secondpoint{after east arrow head}%
+ \fi%
+ \else%
+ \def\firstpoint{after east arrow tip}%
+ \def\secondpoint{east arrow tip}%
+ \fi%
+ \fi%
+ \fi%
+ \fi%
+ \pgfpointintersectionoflines{\referencepoint}{\externalpoint}%
+ {\csname pgf@anchor@arrow box@\firstpoint\endcsname}%
+ {\csname pgf@anchor@arrow box@\secondpoint\endcsname}%
+ }
+}
+
+
+
+
+\endinput