The illustrations in this manual have been created using 3DLDF. The
code that generates them is in the Texinfo files themselves, that
contain the text of the manual. Texinfo is based on TeX, so it's
possible to make use of the latter's facility for writing ASCII text to
files using TeX's
3DLDF-126.96.36.199/CWEB/exampman.web contains the
code, and the file
contains the MetaPost code for generating the illustrations.
3DLDF was built using GCC 2.95 when the illustrations were generated.
For some reason, GCC 3.3 has difficulty with them. It works to generate
them in batches of about 50 with GCC 3.3.
MetaPost outputs Encapsulated PostScript files. These can be included in TeX files, as explained below. However, in order to display the illustrations in the HTML version of this manual, I had to convert them to PNG ("Portable Network Graphics") format. See Converting EPS Files, for instructions on how to do this.
Please note that the illustrations cannot be shown in the Info output format!
If you have problems including the illustrations in the printed version,
for example, if your
installation doesn't have
dvips, look for the following lines
\doepsftrue %% One of these two lines should be commented-out. %\doepsffalse
Now, remove the
% from in front of
\doepsffalse and put
one in front of
\doepsftrue. This will prevent the illustrations
from being included. This should only be done as a last resort,
however, because it will make it difficult if
not impossible to understand this manual.
The C++ code in an example is not always the complete code used to create the illustration that follows it, since the latter may be cluttered with commands that would detract from the clarity of the example. The actual code used always follows the example in the Texinfo source file, so the latter may be referred to, if the reader wishes to see exactly what code was used to generate the illustration.
You may want to skip the following paragraphs in this section, if you're reading this manual for the first time. Don't worry if you don't understand it, it's meaning should become clear after reading the manual and some experience with using 3DLDF.
3DLDF.texi in the directory
3DLDF-188.8.131.52/DOC/TEXINFO, the driver file for this manual, contains
the following TeX code:
\newif\ifmakeexamples \makeexamplestrue %% One of these two lines should be commented-out. %\makeexamplesfalse
texi2dvi is run on
\makeexamplestrue is not commented-out, and
code for the illustrations is written to the file
If the EPS files don't already exist (in the directory
the TeX macro
which includes them in the Texinfo files, will signal an error each time
it can't find one. Just type
s at the command line to tell
TeX to keep going.
If you want to be sure that these are indeed the only errors, you can
<RETURN> after each one instead.
texi2dvi 3DLDF.texi also generates the file
extext.tex, which contains TeX code for including the
illustrations by themselves.
examples.web must now be moved to
examples.c must compiled,
and 3DLDF must be relinked.
ctangle examples also generates
the header file
example.h, which is included
main.web. Therefore, if the contents of
changed since the last time
main.web was ctangled,
main.web will have to be ctangled, and
3dldf is relinked.1
3dldf and MetaPost now
generates the EPS (Encapsulated PostScript) files
3DLDFmp.1 through (currently)
for the illustrations. They must be moved to
texi2dvi 3DLDF.texi is run again, the
\epsffile includes the EPS files for the illustrations in the
3DLDF.texi includes the line
\input epsf, so
dvips (or some other program that does the
job) must be used to convert
3DLDF.dvi to a PostScript file.
To see exactly how this is done, take a look at the
.texi source files of this manual.2
3DLDF.texi belonging to the 3DLDF distribution,
\makeexamplestrue will be commented-out, and
makeexamplesfalse won't be, because the EPS files for the
illustrations are included in the distribution.
The version of
includes the files
If you rename
you can generate the illustrations.
so the compiler must compile the C++
-x c++ option. Otherwise, it would handle them as if
they contained C code.
If you want to try generating the illustrations yourself, you
can save a little run-time by calling
tex 3DLDF.texi the
first time, rather than
texi2dvi. The latter program runs
TeX twice, because it needs two passes in order to generate the
contents, indexing, and cross reference information (and maybe some
other things, too).