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From: stone%sbi.DECnet@MGHCCC.HARVARD.EDU.UUCP
Newsgroups: comp.os.vms
Subject: Help wanted for VWS on VAXstation II/GPX.
Message-ID: <8709240555.AA08093@ucbvax.Berkeley.EDU>
Date: Tue, 22-Sep-87 19:51:00 EDT
Article-I.D.: ucbvax.8709240555.AA08093
Posted: Tue Sep 22 19:51:00 1987
Date-Received: Sat, 26-Sep-87 09:42:31 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: "SBI::STONE" <stone%sbi.decnet@mghccc.harvard.edu>
Distribution: world
Organization: The ARPA Internet
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Greetings,

	We are running a VAXStation II/GPX, 8 plane color, VMS 4.5, VWS 3.1 and
are having a little trouble at getting it to do things that we know it can do. 
We are using the MOVIE.BYU graphics package (from Brigham and Young Univ.) and
I have written up the necessary driver to use it on the GPX.  The driver uses
the UISDC interface (for speed).  The problems are fairly small, but they can
be annoying. 

 1.  When the graphics window is popped to the forground, the occluded areas
replay all of the changes to the screen that have occurred since the window
was created (e.g. items drawn and then erased briefly appear and then dis-
appear as the ERASE command is also replayed).  When the screen finally calms
down, everything looks as it should, but the effect is visually annoying, and
in some instances intolerable.

 2.  I am unable to use dashed lines in the UISDC routines.  I cannot get a
pattern defined and put into the DOP consistently.  If I do get a pattern to
work, I cannot later change the pattern.  Does anyone have a working example?

 3.	How does one read a color bitmap into a buffer??  Nothing I have tried
has worked (and I've tried just about everything I could think of). 

 4.	Using the UIS routines, how does one do animation??  Everytime I move
an object, all of the objects underneath are repainted.  I want to be able to
perform the translations/scales, etc. without repainting background images (I
know it can be done, just look at SIGHT and DECLANDER).

I have found that the VWS manuals are among the least informative manuals DEC
has ever produced (and I've been around since TOPS-20 was the hottest OS on
DEC's *only* big machines).

	I can provide source code to demonstrate the problems if necessary, but
someone (somewhere) must have done this already.  I've already found the answer
to my system hangs in an earlier set of queries and responses on the list.

	If anyone out there is running MOVIE.BYU v6.0 or 6.1 and would like a
copy of my drivers, let me know;  it's yours for the asking.

					David M. Stone
					System Manager
					Shriners Burns Institute
					Boston unit
					stone@mghccc.harvard.edu

					"I am but a lowly programmer..."

Disclaimer:  The opinions expressed herein are wholly my own;  My employers
opinions probably aren't relevant in any case.

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