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%% xyrotate.tex from $Id: xyrotate.doc,v 3.7 2010/06/10 18:45:50 krisrose Exp $
%%
%% Xy-pic ``Rotate and Scale extension'' option.
%% Copyright (c) 1993-1996 Ross Moore <ross.moore@mq.edu.au>
%%
%% 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) 1991-2010 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{rotate}{Rotate and Scale extension}{\stripRCS$Revision: 3.7 $}%
{Ross Moore}{ross.moore@mq.edu.au}%
{Mathematics Department, Macquarie University, NSW~2109, Australia}
\xydef@\xyundefinedRotate@#1#2@@{%
\xywarning@{The #1 #2 effect is not implemented with the current driver.}}%
\xydef@\NoResizing{\xyNoResizing@}
\xydef@\UseResizing{\xyUseResizing@}
\xydef@\xyNoResizing@{%
\global\let\origxyrescale@=\xyrescale@
\global\let\origxyrotSizeMod@=\xyrotateSizeMod@
\global\let\xyNoResizing@=\xyNoResizing@@
\global\let\xyUseResizing@=\xyUseResizing@@
\xyNoResizing@@ }
\xydef@\xyNoResizing@@{%
\global\let\xyrescale@=\xyignorescale@
\global\let\xyrotateSizeMod@=\xyignoreSizeMod@
}
\xylet@\xyUseResizing@=\relax
\xydef@\xyUseResizing@@{%
\global\let\xyrescale@=\origxyrescale@
\global\let\xyrotateSizeMod@=\origxyrotSizeMod@
}
\xydefcsname@{shape [@...]}#1{\xyrotatechar@#1@@}%
\xydefcsname@{shape [<...]}#1{\xyshearchar@{#1}@@}%
\xydefcsname@{shape [*...]}#1{\xyscalechar@{#1}@@}%
\xydefcsname@{shape [left]}{\xyshape@left@}
\xydefcsname@{shape [right]}{\xyshape@right@}
\xydefcsname@{shape [flip]}{\xyshape@flip@}
\xydefcsname@{shape [halfsize]}{\xyshape@halfsize@}
\xydefcsname@{shape [dblsize]}{\xyshape@dblsize@}
\xydefcsname@{shape [vflip]}{\xyshape@vflip@}
\xydefcsname@{shape [hflip]}{\xyshape@hflip@}
\xydef@\preXYtransform@{}
\xydef@\postXYtransform@{}
\xywarnifdefined\preXYtransform@@
\xywarnifdefined\postXYtransform@@
\gdef\preXYtransform@@{}
\gdef\postXYtransform@@{}
\xydef@\xy@transform@{}
\xydef@\preShape@@{}
\xydef@\postShape@@{}
\xydef@\modXYtransform@{%
\ifx\xy@transform@\empty
\transformDrop@\transformConnect@\resetTransform@\fi
\DN@##1{\expandafter\def\expandafter\tmp@\expandafter{##1}}%
\expandafter\next@\expandafter{\preShape@@}%
\DN@##1{\expandafter\gdef\expandafter\preXYtransform@@\expandafter{%
\tmp@ ##1}}\expandafter\next@\expandafter{\preXYtransform@@}%
\DN@##1{\expandafter\def\expandafter\tmp@\expandafter{##1}}%
\expandafter\next@\expandafter{\postShape@@}%
\DN@##1{\expandafter\gdef\expandafter\postXYtransform@@\expandafter{%
\postXYtransform@@ ##1}}\expandafter\next@\expandafter{\tmp@}}%
\xydef@\transformDrop@{\let\xy@transform@=\relax
\expandafter\def\expandafter\Drop@@\expandafter{%
\expandafter\preXYtransform@\Drop@@\postXYtransform@}}
\xydef@\transformConnect@{\let\xy@transform@=\relax
\expandafter\def\expandafter\Connect@@\expandafter{%
\expandafter\preXYtransform@\Connect@@\postXYtransform@}}
\xydef@\resetTransform@{\gdef\preXYtransform@@{}\gdef\postXYtransform@@{}}
\xydef@\xynametransform@#1{%
\DN@{\expandafter\gdef\expandafter#1\expandafter{\the\toks@}}\next@ }
\xydef@\xyscalechar@#1@@{\xyscalechars@#1,#1,@@}
\xydef@\xyscalechars@#1,#2,#3@@{%
\DN@{\xyrescale@(#1,#2)}%
\dimen@=#1\p@
\ifdim\dimen@>\z@ \else \ifdim\dimen@<\z@ \else
\DN@{\xywarning@{invalid scaling factors #1, #2}}%
\fi\fi \dimen@=#2\p@
\ifdim\dimen@>\z@ \else \ifdim\dimen@<\z@ \else
\DN@{\xywarning@{invalid scaling factors #1, #2 }}%
\fi\fi \next@ }
\xydef@\xyrescale@(#1,#2){%
\setboxz@h{\xyscale@@{#1}{#2}%
\dimen@=\ifx-#1\R@c\advance\dimen@-\R@c \dimen@=-\dimen@
\else#1\L@c \advance\dimen@-\L@c\fi
\kern\dimen@\boxz@\kern-\dimen@}%
\R@c=\if-#1\L@c\else#1\R@c\fi
\L@c=\if-#1\R@c\else#1\L@c\fi
\U@c=\if-#2\D@c\else#2\U@c\fi
\D@c=\if-#2\U@c\else#2\D@c\fi }
\xydef@\xyignorescale@(#1,#2){\xywarning@{Ignoring rescale: #1,#2}%
\setboxz@h{\xyscale@@{#1}{#2}\boxz@}}%
\xydef@\xyshape@halfsize@{\xyrescale@(.5,.5)}
\xydef@\xyshape@dblsize@{\xyrescale@(2,2)}
\xydef@\xyshape@flip@{\xyrescale@(-1,-1)}
\xydef@\xyshape@vflip@{\xyrescale@(1,-1)}
\xydef@\xyshape@hflip@{\xyrescale@(-1,1)}
\xydef@\xyrotatechar@{\bgroup
\afterDIRECTIONorEMPTY{\xyrotateSizeMod@}{\xyFN@\xySpecialRotate@i}}
\xydef@\xySpecialRotate@i{%
\ifx \space@\next \expandafter\DN@\space{\xyFN@\xySpecialRotate@i}%
\else\ifx @\next \let\next@=\xyrotateSizeMod@
\else\addEQ@\ifx \next
\addEQ@\DN@##1@@{%
\expandafter\xynametransform@\csname shape [##1]\endcsname\egroup}%
\else\ifx !\next \DN@!{\egroup\getSpecialRotate@}%
\else\ifx *\next \DN@*@@{\egroup\transformDrop@}%
\else \DN@{\xySpecialRotate@@}%
\fi\fi\fi\fi\fi \next@ }
\xydef@\getSpecialRotate@{\doSpecialRotate@@}
\xydef@\xyRotate@#1{\xyundefinedRotate@{rotate}{#1}@@}
\xydef@\xySpecialRotate@#1@@{\xyundefinedRotate@{rotate}{#1}@@\egroup}
\xydef@\doSpecialRotate@#1@@{\xyundefinedRotate@{special rotate}{#1}@@}
\xydef@\xyscale@#1#2{\xyundefinedRotate@{scale}{#1,#2}@@}
\xydef@\UnloadRotate@#1{%
\ifx#1\relax\else\xyunload@{rotation extension}\fi
\let\xyRotate@@=\xyRotate@
\let\xySpecialRotate@@=\xySpecialRotate@
\let\doSpecialRotate@@=\doSpecialRotate@
\let\xyscale@@=\xyscale@ }
\UnloadRotate@\relax
\xyaddunsupport{rotate}{\UnloadRotate@\relax}
\xydef@\xyrotateSizeMod@ @@{%
\L@p=\L@c \R@p=\R@c \U@p=\U@c \D@p=\D@c
\ifdim\cosDirection\p@>\z@
\R@c=\cosDirection\R@p \L@c=\cosDirection\L@p
\U@c=\cosDirection\U@p \D@c=\cosDirection\D@p
\else
\R@c=\cosDirection\L@p \L@c=\cosDirection\R@p
\U@c=\cosDirection\D@p \D@c=\cosDirection\U@p
\fi
\advance\L@c \if-\sinDirection\D@p\else\sinDirection\U@p\fi
\advance\R@c \if-\sinDirection\U@p\else\sinDirection\D@p\fi
\advance\U@c \if-\sinDirection\L@p\else\sinDirection\R@p\fi
\advance\D@c \if-\sinDirection\R@p\else\sinDirection\L@p\fi
\dimen@ii=\L@c \advance\dimen@ii-\L@p
\edef\tmp@{\egroup \L@c=\the\L@c \R@c=\the\R@c \U@c=\the\U@c \D@c=\the\D@c
\dimen@ii=\the\dimen@ii \noexpand\setboxz@h\bgroup
\noexpand\xyRotate@@{\the\Direction}}\tmp@
\xydropRotated@ }
\xydef@\xydropRotated@@{%
\kern\dimen@ii \boxz@ \kern-\dimen@ii \modXYtransform@ \egroup }
\xylet@\xydropRotated@=\xydropRotated@@
\xydef@\xyignoreSizeMod@ @@{\xywarning@{Ignoring rotation}}
\xydef@\xyshape@left@{\xyrotatechar@ v(0,1)@@}
\xydef@\xyshape@right@{\xyrotatechar@ v(0,-1)@@}
\xydef@\xyshearchar@{\xyundefinedRotate@{shearing}}
\xyendinput
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