🚀 go-pugleaf

We have recently installed SunPHIGS 1.3.   Apparently, there is still
no support for hidden line / hidden surface removal in the cgm output
workstation type (phigswstcgmout).  E.g., as in SunPHIGS 1.1, we get
the following message when trying to do a SET HLHSR MODE on the cgm
output workstation.

  SunPHIGS error 111 in SET HLHSR MODE  Ignoring function,
  the specified HLHSR mode is not available on the specified
  workstation.

HLHSR mode continues to work ok on the phigswsttool workstation type
in SunPHIGS 1.3 (although somewhat slowly with our cg6 hardware).

We use cgm files as our basic image exchange media, including moving
images to other machines, making movies out of frame sequences, and
for making hardcopy of the images.  It seems strange that we can't
generate cgm images which are HLHSR-compatible with those that we
can generate on console screens with SunPHIGS.  Am I missing something
and is there a way to generate cgm files from SunPHIGS with the expected
hidden lines/surfaces properly handled?

[We don't want to do screen dumps because the resolution is not as
good as that for cgm, expecially for generating hardcopy.]

Also, does anyone know if Sun will be supporting direct color PostScript
output from SunPHIGS soon?  We have color PostScript printers, and are
currently forced to first create a cgm file from SunPHIGS, then translate
cgm to PostScript, then print it.  It would be useful to directly generate
color PostScript from SunPHIGS.

-Bill McKie
NASA Ames Research Center
mckie@sky.arc.nasa.gov