Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!mcsun!hp4nl!nikhefh!i91
From: i91@nikhefh.nikhef.nl (Fons Rademakers)
Newsgroups: comp.sys.apollo
Subject: Problems printing the dislay in GMR3D
Message-ID: <959@nikhefh.nikhef.nl>
Date: 19 Jul 90 21:13:09 GMT
Sender: rademakers@nikhef.nl (Fons Rademakers)
Reply-To: i91@nikhefh.nikhef.nl (Fons Rademakers)
Organization: Nikhef-H, Amsterdam (the Netherlands).
Lines: 22

I am having problems with the GMR_$PRINT_DISPLAY routine of the GMR3D
package. The problem is that since I changed over from GMR3D 2.5 to
GMR3D 2.7 this routine stoped functioning as it used to. My display
contains two overlapping viewports and everything gets properly draw
by the GMR_$DISPLAY_REFRESH routine; at the bottom the first viewport
and on top the second viewport. In the days of GMR3D 2.5 everything
was printed correctly by GMR_$PRINT_DISPLAY. Now, however, only the
bottom (the first) viewport gets draw in the color white (1.00 setgray).
This gives an invisible picture. Now I noticed that there are new 
routines that handled the transparency of the background and the drawing
order of overlapping viewports. Making the top viewport's background
transparent resulted in a visible drawing on paper of the first
viewport (0.00 setgray). The top viewport, however, still does not get 
drawn. Is this a bug in GMR_$PRINT_DISPLAY or is there something else
that I have to do to get the top viewport drawn too.

-- Fons Rademakers.
-- 
Org:    NIKHEF-H, National Institute for Nuclear and High-Energy Physics.
Mail:   Kruislaan 409, P.O. Box 41882, 1009 DB Amsterdam, the Netherlands
Phone:  (20)5925018 or 5925003                      Telex: 10262 (hef nl)
UUCP:   i91@nikhefh.nikhef.nl            BITNET: nikhefh!i91@mcvax.bitnet