plot3getframe - extract one frame from a UNIX plot file
plot3getframe [-v] desired_frame <
unix_plot
plot3getframe extracts a single frame from a multi-frame UNIX plot file.
Frames are separated by UNIX plot "erase" commands. Specifying the
-v (verbose) flag causes the number of each frame being skipped to be
printed on stderr.
Note that BRL 3-D UNIX plot is a superset of the standard UNIX
plot format, thus this program can process normal plot files as well.
This software is Copyright (c) 1988-2019 by the United States Government as
represented by U.S. Army Research Laboratory.
Reports of bugs or problems should be submitted via electronic mail to
devs@brlcad.org