Re: [Plib-devel] texture repeating

[Steve B. <sjb...@ai...>]

"Curtis L. Olson" wrote:

> I notice that the X-Plane flight sim (www.x-plane.com) gets around the
> mipmap bluring problem by completely turning mipmapping off.  The
> tradeoff is the class pixel mishmash ...

Yep - an aliasing nightmare - I don't regard that as an acceptable
solution.  Aliasing is *evil*.
 
> Just for fun, is there an easy way to turn off mipmap generation in
> ssg?  Perhaps for lower end cards I could just give the user a chance
> to choose their poison ...

Sure - this is like the discussion we had the other day about changing
texture parameters.

Any of these shoulf work:

  * Create the texture yourself - pass the GL texture handle to ssgState,
    since the filter mode *is* a part of the binding, it'll be set
    how you need.

  * Let SSG load an ssgTexture - then do an 'apply' of the ssgState
    (so the texture will be the currently bound one) - change the
    glTexParameteri - and it'll stay changed when the ssgState is
    re-applied...or just:

      ssgTexture *tx = new ssgTexture ( "whatever.rgb" ) ;
      glBindTexture   ( GL_TEXTURE_2D, tx->getHandle() ) ;
      glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ) ;
      glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR ) ;
      glBindTexture   ( GL_TEXTURE_2D, 0 ) ;

  * Write a derived class of ssgTexture that sets different glTexParameters.

  * Add it into ssgTexture and offer it back as an SSG enhancement.

I don't think you'll like the results though.

-- 
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