Path: chuka.playstation.co.uk!scea!greg_labrec@interactive.sony.com
From: Scott Cartier <dsyaroze@concentric.net>
Newsgroups: scea.yaroze.programming.2d_graphics
Subject: Re: Backgrounds
Date: Wed, 20 Aug 1997 19:02:46 -0700
Organization: SCEA News Server
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Colin,

I don't think that's the problem (at least I hope not!).
I only have maybe 10-15 sprites on the screen along with
the background.  I've done a stress test where I've seen
how many sprites I could get before flickering started.
It was upwards of 200.  Unless drawing the background
takes a *lot* longer than drawing sprites.  But if that's
the case then there wouldn't be much point in having a
background (in hi-res mode at least).

Scott


> Hi Scott,
> 
> If your drawtime goes over 1/60s in 640x480y then you will get the
> flickering background effect because of the auto line clipping which
> only lets you draw on odd/even lines depending on which field is being
> displayed.
> 
> Cheers,
> 
> Colin.