blob: 27891ee95ee689ac47419acb3e34b3d7e66ab4ae (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
%
% 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}%
|
