Doom Editing Digest Vol. 01 Nr. 371

Published in

· 7 months ago

From:      owner-doom-editing-digest 
To:        doom-editing-digest@nvg.unit.no 
Subject:   doom-editing-digest V1 #371 
Reply-To:  doom-editing 
Errors-To: owner-doom-editing-digest 
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doom-editing-digest        Monday, 7 August 1995       Volume 01 : Number 371 

A visiplane overflow solution 
Re: A visiplane overflow solution  

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From: DTeeter@AOL.COM 
Date: Sat, 5 Aug 1995 21:13:49 -0400 
Subject: A visiplane overflow solution 

Hi, 

I've been building a grocery store and have had some serious problems with 
visiplane overflow crashes in Heretic. I think that the solution to the 
problem may prove interesting. 

The grocery store is a "building" composed of an outdoors area with an inside 
area (the building) enclosed with one sided line defs. Inside the building 
are numerous sectors that make up the isles, cash registers and so on.  

Whenever I went in to one corner of the building I got kicked out to DOS with 
a "visiplane" error.  

I tried getting rid of some of the interior sectors, moving stuff that was 
outside of the store's windows, getting rid of sectors in the "outside" area, 
and numerous other ideas I won't go into. All of these changes were made 
starting from same initial .wad file. 

The final solution suprised me. During one test I noticed that the ceiling 
was a patch work of two different textures. 

When I set all of the sectors inside of the building to the same ceiling 
texture, the visiplane overflow problem went away. 

This was very suprising to me in that everone usually says that visiplane 
errors are related to the number of line-defs in view. 

In this case Heretic was getting "maxed out" by the number of different flats 
(ceiling)  textures being displayed. 

I read this list regularly and don't remember anyone mentioning this kind of 
solution. My apologies if this is old news. 

Dan Teeter (DTeeter@aol.com or dteeter@inchq.com) 

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From: Robert Forsman <thoth@cis.ufl.edu> 
Date: Sun, 06 Aug 1995 09:13:53 EDT 
Subject: Re: A visiplane overflow solution  

DTeeter@AOL.COM ,in message <950805211349_48836519@aol.com>, wrote:  

> In this case Heretic was getting "maxed out" by the number of different flats 
> (ceiling)  textures being displayed. 

  Well, something like that.  I'll guess that it gets overloaded by too many 
sectors with differing ceiling textures.  You could make a ceiling with a 
checkerboard of two flats, but 64 polygons and you'd strain or break things, 
but if you made them all the same texture it might be merging polygons. 

  I don't think the texture issue has been brought up before. Thanks! 

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End of doom-editing-digest V1 #371 
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