Path: chuka.playstation.co.uk!news
From: "Colin Hughes" <colin_hughes@playstation.sony.com>
Newsgroups: scee.yaroze.programming.2d_graphics
Subject: Re: Sprite bug ? or me ?
Date: Fri, 10 Jul 1998 16:39:40 +0100
Organization: PlayStation Net Yaroze (SCEE)
Lines: 38
Message-ID: <6o5d5l$9o5@chuka.playstation.co.uk>
References: <359E28D7.4E53@livemedia.co.uk>
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Fast Sprites ( not scaled or rotated ) must have even u co-ords, and even
widths ( Because the GPU renders them 2 pixels at a time )
The X position is not limited however.

Colin.

Charlie wrote in message <359E28D7.4E53@livemedia.co.uk>...
>Hi,
>
>I've got some strage behaviour happening with a some sprites.
>The sprites I'm using are 8 pixels high, and vary between 6,7,8,9 pixels
>wide, and they're being used with no scaling or rotation.
>
>What seems to be happening is that occasionally, on some of them, one
>vertical line in the sprite is drawn twice causing a distortion effect.
>Almost like its trying scale it horizontally in some way. Does that make
>any sense ?
>
>Are there any known bugs with sprites ? Any one got any ideas ?
>
>One thing has just occured to me .. The source image is an 8-bit 256
>pixels square image, with the sprites living at various locations in
>there. I'm setting up a base GsSPRITE with u,v=0,0 and w,h=256,256 and
>then I'm copying various regions from the source image by modifying the
>u,v and w,h values of this base GsSPRITE. What I'm not doing is
>recalculating the 'Texture Page' info every time. Should this work ok ?
>It seems to other than the bug I'm talking about.
>
>Hope some of this makes sense to someone !
>
>cheers
>
>Charlie
>
>P.S. Has the world cup and England Argentina etc, just bypassed Yaroze
>users, or is everyone just keeping out of the ng's, or does no-one care!