glitching sprites while doing ScrollVPort

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#9922

From: Karl Lehenbauer
Date: Fri, 30 Sep 1988 22:47

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I'm having some problems with a little technology demonstrator I'm cooking
up.  It is a lunar lander that vertically and horizontally scrolls a
320X200 screen over a 640X400 IFF ILBM using ScrollVPort.  The problem is
that when the screen is scrolling, the sprites glitch, show as vertical
crud for the whole height of the display and such.  I was wondering if
anybody knows offhand what I should be doing that I'm not.  It's possibly
just a dumb bug inside the program, though, 'cuz it's kind of hacked, but
it's so strongly correlated with the scrolling, I thought there might be
something I missed.
-- 
-- "Insert the disk at your own risk."  -- Firesign Theater
-- uunet!sugar!karl, Unix BBS (713) 438-5018

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Message-ID: <2716@sugar.uu.net>

Path: arc1-ca.pugleaf.net!utzoo!utgpu!attcan!uunet!sugar!karl

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!attcan!uunet!sugar!karl
From: karl@sugar.uu.net (Karl Lehenbauer)
Newsgroups: comp.sys.amiga.tech
Subject: glitching sprites while doing ScrollVPort
Message-ID: <2716@sugar.uu.net>
Date: 30 Sep 88 22:47:55 GMT
Organization: Sugar Land Unix - Houston, TX
Lines: 12