Re: [Plib-devel] texture repeating

[Amit B. <am...@de...>]

Try moving your texture coordinates in by 1/2 a texel.

So if your texture is 256x256, instead of using (0,0)->
(0,1) use ( 0.5 / 256 , 0.5 / 256 ) -> ( 0.5 / 256 , 1.0 - 0.5 / 256)
etc. You get the idea.

-Amit

----- Original Message ----- 
From: "Curtis L. Olson" <cu...@me...>
To: <pli...@li...>
Sent: Thursday, August 24, 2000 11:25 AM
Subject: [Plib-devel] texture repeating


> Steve,
> 
> In ssg is there a way to control whether a texture is set to "repeat"
> or not?
> 
> As I start working on runways I'm starting to notice some artifacts.
> 
> I want to slap a texture down on top of a specific area and have the
> texture cover it completely ... texture coordinates of lower corner
> are (0,0), upper corner are (1,1), etc.
> 
> Now, what I'm finding is that if I have a texture that is all black
> along one edge and all white along the other edge, I get some bleed
> across to the opposite edge ... i.e. some of that white on one edge
> scrolls around and shows up on the opposite edge and visa versa for
> the black ... this makes it really ugly to piece together adjacent
> textures because you always can see the joint because of this bleed
> across.
> 
> I'm assuming this is because the ssg textures are by default set to
> repeat, right?
> 
> Do you have any strategies you can share for avoiding this problem?
> 
> Thanks,
> 
> Curt.
> -- 
> Curtis Olson   Human Factors Research Lab       Flight Gear Project
> Twin Cities    cu...@hf...                cu...@fl...
> Minnesota      http://www.menet.umn.edu/~curt   http://www.flightgear.org
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