Re: [Closed REQ 5856]: Is it possible to run geomview with no windows?

[daemon]

When you invoke geomview with no windows, try using "default" rather than
"c0" as the camera name.  There may be some bugs in this area, but
it's likely to work.  For example, I just tried:

(window default { size 500 250 })
(load hdodec.off)
(snapshot default t.ppm ppm)
(delete hdodec.off)
(load antoine3.oogl)
(snapshot default t2.ppm ppm)
(quit)

and got two image files, as expected.

Beware: It's likely that, even with no visible windows, geomview needs
to be able to connect to some X display, i.e. that 
DISPLAY must be set to something valid and accessible.
I think it uses this for initialization even if there's no
immediate need.

Note also that the (snapshot ... ppm) command allows a shell-command
in place of the ppm file name, if its first character is
a vertical bar, as in
   (snapshot default "|pnmtotiff > t.tiff" ppm)
or (snapshot default "|compress > t.ppm.Z" ppm)