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- %
- % These macros allow you to rotate or flip a \TeX\ box. Very useful for
- % sideways tables or upsidedown answers.
- %
- % To use, create a box containing the information you want to rotate.
- % (An hbox or vbox will do.) Now call \rotr\boxnum to rotate the
- % material and create a new box with the appropriate (flipped) dimensions.
- % \rotr rotates right, \rotl rotates left, \rotu turns upside down, and
- % \rotf flips. These boxes may contain other rotated boxes.
- %
- \newdimen\rotdimen
- \def\vspec#1{\special{ps:#1}}% passes #1 verbatim to the output
- \def\rotstart#1{\vspec{gsave currentpoint currentpoint translate
- #1 neg exch neg exch translate}}% #1 can be any origin-fixing transformation
- \def\rotfinish{\vspec{currentpoint grestore moveto}}% gets back in synch
- %
- % First, the rotation right. The reference point of the rotated box
- % is the lower right corner of the original box.
- %
- \def\rotr#1{\rotdimen=\ht#1\advance\rotdimen by\dp#1%
- \hbox to\rotdimen{\hskip\ht#1\vbox to\wd#1{\rotstart{90 rotate}%
- \box#1\vss}\hss}\rotfinish}
- %
- % Next, the rotation left. The reference point of the rotated box
- % is the upper left corner of the original box.
- %
- \def\rotl#1{\rotdimen=\ht#1\advance\rotdimen by\dp#1%
- \hbox to\rotdimen{\vbox to\wd#1{\vskip\wd#1\rotstart{270 rotate}%
- \box#1\vss}\hss}\rotfinish}%
- %
- % Upside down is simple. The reference point of the rotated box
- % is the upper right corner of the original box. (The box's height
- % should be the current font's xheight, \fontdimen5\font,
- % if you want that xheight to be at the baseline after rotation.)
- %
- \def\rotu#1{\rotdimen=\ht#1\advance\rotdimen by\dp#1%
- \hbox to\wd#1{\hskip\wd#1\vbox to\rotdimen{\vskip\rotdimen
- \rotstart{-1 dup scale}\box#1\vss}\hss}\rotfinish}%
- %
- % And flipped end for end is pretty ysae too. We retain the baseline.
- %
- \def\rotf#1{\hbox to\wd#1{\hskip\wd#1\rotstart{-1 1 scale}%
- \box#1\hss}\rotfinish}%
-