Path: chuka.playstation.co.uk!news
From: dave@lunar1.demon.co.uk (David Wagner)
Newsgroups: scee.yaroze.programming.2d_graphics
Subject: Re: Rotation property of sprites
Date: Tue, 07 Apr 1998 17:56:59 GMT
Organization: Not very. Pretty unorganised in fact.
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References: <352a3987.6501481@www.netyaroze-europe.com> <3529F85F.7EFC4AC3@micronetics.com>
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Thanks for your advice.

One question though, I thought 4096 = 1 degree for the rotation
property?

On Tue, 07 Apr 1998 10:56:47 +0100, Jim <jim@micronetics.com> wrote:
>Use 4096 as 360deg.
>An easy way to flip back to zero is to used a bitwise &, take rx as the
>variable.
>
>rx += 32;		// rotate it a bit
>rx &= 4095;		// mask out anything > 4095 
>
>If you want to measure everything in degreese.
>
>rx += 32;
>rx %= 360;		// wrap back to 0
>
>Its possible that the psx doesn't trap an overflow exception and would
>get stuck in the exception handler.  Although I would doubt this as
>overflowing regs would be quite common.
>
[munched by the terror of the Cave of Caerbannog]