Sender: nate AT cartsys DOT com
Message-ID: <36A38DCC.A93B9488@cartsys.com>
Date: Mon, 18 Jan 1999 11:38:52 -0800
From: Nate Eldredge <nate AT cartsys DOT com>
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To: djgpp AT delorie DOT com
Subject: Re: Polygon scan problem
References: <77tsdv$6mk$1 AT news7 DOT svr DOT pol DOT co DOT uk>
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Reply-To: djgpp AT delorie DOT com

Michael Stewart wrote:
> 
> I have been having an annoying problem whilst writing a scan convertor.
> Hopefully someone will be able to see what I am doing wrong.
> 
> The problem I have been having concerns the accuracy of fixed point values.
> The routine works as it should while using doubles, however when converting
> to fixed point values I loose an enormous amount of accuracy, to much to be
> accounted for by the accuracy of a 16.16 fixed point value.
> 
> I have tried using Allegros fixed point routines instead of my own and I get
> the exactly the same problem. Can anyone see what I am doing wrong ?

Conversions between integer and `fixed' need to call the appropriate
routine (`itofix' or `fixtoi').
-- 

Nate Eldredge
nate AT cartsys DOT com