Overlapping viewports

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GARY ADAIR (adairg++at++qmsmtpgw.mugu.navy.mil)
16 Aug 1996 15:31:53 U

                      Subject: Time: 2:39 PM
  OFFICE MEMO Overlapping viewports Date: 8/16/96

 Greetings:

My objective is to create a HUD overlay for the main channel, which contains
an Earth/Sky and other objects. I have accomplished this by creating 2
channels with overlapping viewports, using the share mask to control which
attributes are shared, and using a draw callback function for the HUD
channel. This approach works fine when applied only to a Performer
application. The problem occurs when I try to apply this approach with a
mixed Performer and Motif application; in which Motif is forked off. In this
case, the HUD viewport appears to be behind (is blocked from view by) the
main channel viewport. I would greatly appreciate any help with this one.

Thanks in Advance, Gary Adair

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