5 # Example file for `chem':
7 # This originates from Computing Science Technical Report No. 122
8 # CHEM - A Program for Typesetting Chemical Diagrams: User Manual
9 # by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
10 # <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
12 # Copyright (C) 2006, 2009 Free Software Foundation, Inc.
14 # Last update: 5 Jan 2009
16 # This file is part of `chem', which is part of `groff'.
18 # `groff' is free software; you can redistribute it and/or modify it
19 # under the terms of the GNU General Public License as published by
20 # the Free Software Foundation, either version 3 of the License, or
21 # (at your option) any later version.
23 # `groff' is distributed in the hope that it will be useful, but
24 # WITHOUT ANY WARRANTY; without even the implied warranty of
25 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 # General Public License for more details.
28 # You should have received a copy of the GNU General Public License
29 # along with this program. If not, see <http://www.gnu.org/licenses/>.
31 ########################################################################
34 bond 120 length .3 ; BP
35 back bond -120 length .25 from BP ; H
36 front bond 120 length .25 from BP ; CH3
37 bond 60 length .5 from BP ; BP
38 bond -60 length .25 from BP ; H
39 # note the pic move command to position the text
40 move left .35 ; "(ANTI)"
41 front bond 60 length .25 from BP ; H
42 # another positioning of text
43 move right .35 ; "(SYN)"
44 bond 120 length .4 from BP ; BP
45 back bond -120 length .25 from BP ; H
46 front bond 120 length .25 from BP ; CH3
47 bond 60 length .5 from BP
50 ########################################################################