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This directory contains the examples for the `chem' language written
in the book:
Computing Science Technical Report No. 122
CHEM - A Program for Typesetting Chemical Diagrams: User Manual
by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
The book is available in the internet at
<http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
Many of the examples had to be fixed. Unfortunately, the `chem' akw
version does not run on many of these programs. But the Perl version
of `chem' works on all examples.
Most examples do not use the modern chemical display. They have C
atoms added, whereas the modern method omits all C atoms and their
directly appended H atoms.
The examples are named and sorted by the chapter where they are found
in the book. For example, the file `ch4c_colon.chem' means a `chem'
example in chapter 4; according to `c', it is the third example in
this chapter; the name `colon' is used to describe the context of the
example.
You can view the graphical display of the examples by calling
groffer <file>
`groffer' calls `chem' automatically.
If you want to transform example files to a different format use the
`roff2*' programs:
`roff2dvi' prints dvi format to standard output,
`roff2html' generates html output,
`roff2pdf' outputs pdf mode,
`roff2ps' produces PostScript output,
`roff2text' generates text output in the groff device `latin1',
`roff2x' prints the output in the groff device X that is
suitable for programs like `gxditview' or `xditview'.
To get a suitable `groff' output run
@g@chem <file> | groff -p ...
####### License
Last update: 5 Jan 2009
Copyright (C) 2006, 2009 Free Software Foundation, Inc.
Written by Bernd Warken.
This file is part of `chem', which is part of `groff'.
`groff' 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 3 of the License, or
(at your option) any later version.
`groff' 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 program. If not, see <http://www.gnu.org/licenses/>.
####### Emacs settings
Local Variables:
mode: text
End:
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