Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!ames!sgi!shinobu!odin!mds
From: mds@sgi.com (Mark Stadler)
Newsgroups: comp.sys.sgi
Subject: Re: zbuffering and lrectwrite
Message-ID: <1991Mar10.030239.16096@odin.corp.sgi.com>
Date: 10 Mar 91 03:02:39 GMT
References: <76269@bu.edu.bu.edu>
Sender: news@odin.corp.sgi.com (Net News)
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 21

In article <76269@bu.edu.bu.edu> tjh@bu-pub.bu.edu (Tim Hall) writes:
>I was suprised to find out (through experience) that lrectwrite
>is affected by the zbuffer.  That is when zbuffering is turned
>on lrectwrite only paints those pixels have a zvalue less than
>(or greater etc.. depending on zfunction) some threshold value.
>Actually I'm so suprised that this is the case I wonder if I did
>somthing to cause this.  If this is the normal behavior what is
>the threshold value?  Anyhow, surrounding the lrectwrite call by
>zbuffer FALSE/TRUE commands produced my desired result.
>
>-- 
>-Tim Hall
>tjh@bu-pub.bu.edu
>
this should not be the case.  a machine configuration and a sample
program demonstrating the problem (preferable small) could help
us in explaining what the problem is (yours or ours).


--
-- mds	[aka Mark D Stadler  mds@sgi.com  ...!uunet!sgi!mds  (415)335-1327]