%PDF-
%PDF-
Mini Shell
Mini Shell
%% xysmart.tex from $Id: xysmart.doc,v 3.6 2011/03/14 20:14:00 krisrose Exp $
%%
%% Xy-pic ``Smart Path feature'' option.
%% Copyright (c) 1998 George C. Necula <necula@cs.cmu.edu>
%%
%% This file is part of the Xy-pic package for graphs and diagrams in TeX.
%% See the companion README and INSTALL files for further information.
%% Copyright (c) 1991-2011 Kristoffer H. Rose <krisrose@tug.org>
%%
%% The Xy-pic package is free software; you can redistribute it and/or modify
%% it under the terms of the GNU General Public License as published by the
%% Free Software Foundation; either version 2 of the License, or (at your
%% option) any later version.
%%
%% The Xy-pic package is distributed in the hope that it will be useful, but
%% WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
%% or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
%% for more details.
%%
%% You should have received a copy of the GNU General Public License along
%% with this package; if not, see http://www.gnu.org/licenses/.
%%
\ifx\xyloaded\undefined \input xy \fi
\xyprovide{smart}{Smart Path option}{\stripRCS$Revision: 3.6 $}%
{George C. Necula}{necula@cs.cmu.edu}%
{School of Computer Science,
Carnegie Mellon University,
5000 Forbes Avenue,
Pittsburgh, PA 15213-3891, USA}
\xyrequire{arrow}\xycatcodes
\let\origPATHturn@=\PATHturn@
\def\PATHturn@{%
\ifx \space@\next \expandafter\DN@\space{\xyFN@\PATHturn@}%
\else\ifx s\next
\let\origPATHturn@i=\PATHturn@i\let\PATHturn@i=\PATHsmartturn@i
\let\origPATHturn@cir=\PATHturn@cir\let\PATHturn@cir=\PATHsmartturn@cir
\DN@ s{\xyFN@\origPATHturn@}%
\else
\DN@{\origPATHturn@}%
\fi\fi
\next@}
\xydef@\PATHsmartturn@cir{%
\edef\next@{{\CIRin@@}{\expandafter\noexpand\CIRorient@@}{\CIRout@@}}%
\expandafter\PATHturn@i\next@}
\xydef@\PATHsmartturn@i#1#2#3{%
\DN@##1{%
\def\PATHinit@@{%
\xy@@{%
\def\sm@CIRin{#1}\def\sm@CIRout{#3}%
\ifx\sm@CIRout\empty
\let\sm@CIRout=\sm@CIRin
\let\sm@CIRin=\PATHlastout@@
\fi
##1\relax}%
\xy@@{\enter@{\basefromthebase@}}%
\xy@@{\sm@conn}%
\xy@@{\X@p=\X@c \Y@p=\Y@c \czeroEdge@% Save the start of the segment
\count@=\sm@CIRout\count@=\the\count@% Move forward a dash to
\dimen@=\xydashl@ \ABfromdiag@ \advance\X@c\A@ \advance\Y@c\B@
\edef\PATHpostpos@@{\X@c=\the\X@c \Y@c=\the\Y@c \noexpand\czeroEdge@
\noexpand\PATHomitslide@@true}}%
\xy@@{\leave@
\edef\PATHlastout@@{\sm@CIRout}%
\count@=\sm@CIRout \dimen@=\xydashl@ \Directionfromdiag@}}}%
\expandafter\next@\expandafter{\the\toks@}\toks@={}%
\let\PATHextra@@=\empty
\def\PATHpost@@{\xy@@\PATHpostpos@@}%
\let\PATHlabelsextra@@=\relax
\let\PATHturn@i=\origPATHturn@i
\let\PATHturn@cir=\origPATHturn@cir
\xyFN@\PATHturn@ii}
\xydef@\sm@nil{}
\xydef@\sm@nnil{\sm@nil}
\xydef@\sm@maxcost{1000mm}%
\xydef@\sm@conn{
\enter@{\cfromthec@ \DirectionfromtheDirection@}\cfromp@% Adjust p
\count@=\sm@CIRin\count@=\the\count@
\dimen@=\xydashl@ \ABfromdiag@ \advance\X@p\A@\advance\Y@p\B@
\setupDirection@ \the\Edge@c\z@ \czeroEdge@
\pfromc@
\reverseDirection@
\count@=\sm@CIRin\count@=\the\count@
\dimen@=\xydashl@ \ABfromdiag@
\edef\tmp@{\noexpand\dir\artail@@}\expandafter\sm@drop@\tmp@
\X@c=\X@p\advance\X@c\A@ \Y@c=\Y@p\advance\Y@c\B@ \czeroEdge@
\sm@stri
\X@p=\X@c \Y@p=\Y@c
\leave@
\enter@{\pfromthep@ \DirectionfromtheDirection@}\pfromc@% Adjust c
\count@=\sm@CIRout\count@=\the\count@
\dimen@=\xydashl@ \ABfromdiag@ \advance\X@p-\A@\advance\Y@p-\B@
\setupDirection@ \the\Edge@c\z@
\advance\X@c-\A@\advance\Y@c-\B@% Leave room for a dash to terminate the seg
\czeroEdge@
\def\PATHlabelsnext@@{}%
\leave@
\R@=\turnradius@
\cirrestrict@@%Adjust the radius to fit the circles
\let\sm@circles=\sm@nil
\edef\sm@bestcost{\sm@maxcost}%
\sm@trycircles 1%Try counter clockwise first
\sm@trycircles{-1}%
\ifdim\sm@bestcost<\sm@maxcost
\cfromp@
\expandafter\sm@conndraw\sm@bestconn
\else
\xyerror@{Cannot draw the smart connector}{}%
\fi
}
\xydef@\sm@trycircles#1{%
\ifnum #1>0% Compute the opposite orientation
\def\sm@CIRorienti{-1}%
\else
\def\sm@CIRorienti{1}%
\fi
\edef\tmp@{{{\sm@CIRin}{#1}{\sm@CIRout}}}%
\expandafter\sm@trycirclelist\expandafter{\tmp@\sm@nil}%
\count@@=\sm@CIRin\count@@=\the\count@@\count@=\count@@
\sm@roundcount@{#1}%
\edef\sm@savecount@{\the\count@}%
\ifnum\the\count@=\the\count@@ \else
\edef\tmp@{{{\sm@CIRin}{#1}{\the\count@}}%
{{\the\count@}{\sm@CIRorienti}{\sm@CIRout}}}%
\expandafter\sm@trycirclelist\expandafter{\tmp@\sm@nil}%
\fi
\count@=\sm@savecount@\count@=\the\count@
\sm@advancecount@ 2{#1}\edef\sm@savecount@{\the\count@}%
\edef\tmp@{{{\sm@CIRin}{#1}{\the\count@}}%
{{\the\count@}{\sm@CIRorienti}{\sm@CIRout}}}%
\expandafter\sm@trycirclelist\expandafter{\tmp@\sm@nil}%
\count@=\sm@savecount@\count@=\the\count@
\sm@advancecount@ 2{#1}\edef\sm@savecount@{\the\count@}%
\edef\tmp@{{{\sm@CIRin}{#1}{\the\count@}}%
{{\the\count@}{\sm@CIRorienti}{\sm@CIRout}}}%
\expandafter\sm@trycirclelist\expandafter{\tmp@\sm@nil}%
\count@=\sm@savecount@\count@=\the\count@
\sm@advancecount@ 2{#1}\edef\sm@savecount@{\the\count@}%
\edef\tmp@{{{\sm@CIRin}{#1}{\the\count@}}%
{{\the\count@}{\sm@CIRorienti}{\sm@CIRout}}}%
\expandafter\sm@trycirclelist\expandafter{\tmp@\sm@nil}%
}
\xydef@\sm@advancecount@#1#2{%
\ifnum #2>0
\edef\tmp@{#1}%
\else
\edef\tmp@{-#1}%
\fi
\advance\count@\tmp@\count@=\the\count@
\ifnum\the\count@<0 \advance\count@ 8\fi
\ifnum\the\count@>7 \advance\count@ -8\fi
\count@=\the\count@
}
\xydef@\sm@roundcount@#1{%
\ifcase\the\count@
\advance\count@ #1\or
\or \advance\count@ #1\or
\or \advance\count@ #1\or
\or \advance\count@ #1\fi
\count@=\the\count@
\ifnum\the\count@<0 \advance\count@ 8\fi
\ifnum\the\count@>7 \advance\count@ -7\fi
\count@=\the\count@
}
\newif\ifsm@firstseg
\newif\ifsm@acceptable
\xydef@\sm@trycirclelist#1{%
\R@p=\z@\U@p=\R@p% Clear the deltas
\def\sm@exthp{0}\def\sm@exthm{0}%
\def\sm@extvp{0}\def\sm@extvm{0}%
\def\sm@dxp{0pt}\def\sm@dxm{0pt}%
\def\sm@dyp{0pt}\def\sm@dym{0pt}%
\def\sm@segs{}%
\sm@firstsegtrue
\def\sm@connlen{0pt}%
\let\sm@tryclcont=\sm@trycirclelist@i
\sm@trycirclelist@i #1%Strip {} to expose the list elements
\count@@=\sm@CIRout\count@@=\the\count@\count@=\the\count@
\sm@roundcount@{1}%
\ifnum\count@=\count@@
\edef\sm@segs{\sm@segs{{\the\count@}{1}{\the\count@}}}%
\fi
\A@=\X@p\advance\A@\R@p\advance\A@ -\X@c\A@=-\A@
\B@=\Y@p\advance\B@\U@p\advance\B@ -\Y@c\B@=-\B@
\sm@acceptabletrue
\ifdim\A@>0pt
\ifnum\sm@exthp>0 \dimen@=\A@ \divide\dimen@\sm@exthp
\edef\sm@dxp{\the\dimen@}%
\else \sm@acceptablefalse\fi\fi
\ifdim\A@<0pt
\ifnum\sm@exthm>0 \dimen@=\A@ \divide\dimen@\sm@exthm
\edef\sm@dxm{\the\dimen@}%
\else \sm@acceptablefalse\fi
\A@=-\A@%Make it positive
\fi
\ifdim\B@>0pt
\ifnum\sm@extvp>0 \dimen@=\B@ \divide\dimen@\sm@extvp
\edef\sm@dyp{\the\dimen@}%
\else \sm@acceptablefalse\fi\fi
\ifdim\B@<0pt
\ifnum\sm@extvm>0 \dimen@=\B@ \divide\dimen@\sm@extvm
\edef\sm@dym{\the\dimen@}%
\else \sm@acceptablefalse\fi
\B@=-\B@
\fi
\ifsm@acceptable
\dimen@=\sm@connlen\advance\dimen@\A@\advance\dimen@\B@
\ifdim\dimen@<\sm@bestcost
\edef\sm@bestcost{\the\dimen@}%
\edef\sm@bestconn{{\sm@dxp}{\sm@dxm}{\sm@dyp}{\sm@dym}{\sm@segs}}%
\fi
\fi
}
\xydef@\sm@showext#1{%
\W@{#1\space hp=\sm@exthp,hm=\sm@exthm,vp=\sm@extvp
,vm=\sm@extvm,len=\sm@connlen}}
\xydef@\sm@trycirclelist@i#1{%
\def\@tmp{#1}%
\ifx \@tmp\sm@nnil \let\sm@tryclcont=\relax\else
\expandafter\sm@tryclcar\@tmp \fi
\sm@tryclcont}
\xydef@\sm@tryclcar#1#2#3{%
\dimen@=\ifnum #2<0 -\fi\R@
\count@=#1\count@=\the\count@ \ABfromdiag@
\advance\R@p -\B@ \advance\U@p \A@
\count@=#3\count@=\the\count@ \ABfromdiag@
\advance\R@p \B@ \advance\U@p -\A@
\sm@computeext{#1}{#2}{#3}%
}
\xydef@\sm@computeext#1#2#3{%
\ifsm@firstseg
\sm@accumext#1%
\sm@firstsegfalse
\fi
\count@@=#1\count@@=\the\count@@\count@=\count@@
\dimen@=\sm@connlen
\sm@roundcount@{#2}%
\ifnum \count@=\count@@
\sm@advancecount@ 1{#2}%
\advance\dimen@ 0.7854\R@% It was incremented with 1/8 circle
\ifnum \count@=#3% Check if done
\else
\sm@advancecount@ 1{#2}%
\advance\dimen@ 0.7854\R@% It was incremented with 1/8 circle
\fi
\else
\advance\dimen@ 0.7854\R@% It was incremented with 1/8 circle
\fi
\edef\sm@connlen{\the\dimen@}%
\sm@accumext{\the\count@}%
\edef\sm@segs{\sm@segs{{#1}{#2}{\the\count@}}}%
\ifnum\the\count@=#3 \else
\edef\tmp@{{\the\count@}{#2}{#3}}%
\expandafter\sm@computeext\tmp@
\fi
}
\xydef@\sm@accumext#1{%
\ifcase #1%
\or \count@@=\sm@extvm\advance\count@@ by1%
\edef\sm@extvm{\the\count@@}%
\or\or \count@@=\sm@exthp\advance\count@@ by1%
\edef\sm@exthp{\the\count@@}%
\or\or \count@@=\sm@extvp\advance\count@@ by1%
\edef\sm@extvp{\the\count@@}%
\or\or \count@@=\sm@exthm\advance\count@@ by1%
\edef\sm@exthm{\the\count@@}%
\fi
}
\xydef@\sm@conndraw#1#2#3#4#5{%
\def\sm@contlist{\sm@drawseglist}%
\edef\sm@dxp{#1}%
\edef\sm@dxm{#2}%
\edef\sm@dyp{#3}%
\edef\sm@dym{#4}%
\sm@drawseglist #5\sm@nil}
\xydef@\sm@drawseglist#1{%
\ifx #1\sm@nil \def\sm@contlist{}\else
\sm@drawseg #1\fi
\sm@contlist}
\xydef@\sm@drawseg#1#2#3{%
\def\CIRin@@{#1}\def\CIRout@@{#3}%
\sm@straight%See if a straight line is needed here. Insert it and
\ifnum\CIRin@@=\CIRout@@ \else
\count@=\CIRin@@
\dimen@=\ifnum #2<0 -\fi\R@
\ABfromdiag@
\advance\X@c -\B@ \advance\Y@c \A@
\ifnum #2>0 \def\CIRorient@@{\CIRacw@}%
\else \def\CIRorient@@{\CIRcw@}\fi
\drop@\literal@{\hbox\bgroup\cir@i}%
\dimen@=\ifnum #2<0 -\fi\R@
\count@=\CIRout@@\count@=\count@%Wierd. If I remove this last assignm
\ABfromdiag@
\advance\X@c\B@ \advance\Y@c-\A@
\fi
}
\xydef@\sm@straight{%
\U@c=\z@\D@c=\U@c\L@c=\U@c\R@c=\U@c
\pfromc@
\ifcase \CIRin@@ \or% 1 is V-
\A@=\sm@dym\advance \Y@c\A@
\or\or
\A@=\sm@dxp\advance \X@c\A@
\or\or
\A@=\sm@dyp\advance \Y@c\A@
\or\or
\A@=\sm@dxm\advance \X@c\A@ \fi
\ifdim\X@c=\X@p\ifdim\Y@c=\Y@p\else \sm@stri \fi\else \sm@stri \fi
}
\xydef@\sm@stri{%
\edef\tmp@{\expandafter\noexpand\arstemprefix@@\arstem@@}%
\expandafter\sm@connect@\tmp@}
\xydef@\sm@connect@#1#{%
\DN@##1{\connect@{#1}{##1}}\next@}
\xydef@\sm@drop@#1#{%
\DN@##1{\drop@{#1}{##1}}\next@}
\xydef@\smconn#1#2#3{%
\edef\sm@CIRin{#1}\edef\sm@CIRout{#2}%
\R@=#3\R@=\the\R@
\sm@conn}
\xyendinput
Zerion Mini Shell 1.0