From: Marcin Romaszewicz (marcin++at++asmodean.engr.sgi.com)
Date: 03/28/2000 12:57:17
On Mon, 27 Mar 2000, ross::barna wrote:
>
> texture->setFilter(PFTEX_MINFILTER, PFTEX_MIPMAP_TRILINEAR);
>
> bingo! what sort of performance penalties will i pay on {onyx2, octane
> MXE, o2, linux box with no accel}.
>
You will not see any penalty on onyx2 or mxe. An o2 will be a bit slower,
but I can't say exactly how much. A linux box with no acceleration will
take a huge hit with texture filtering of any sort, especially this type.
-- Marcin
> -ross
>
>
> On Mon, 27 Mar 2000, Angus Dorbie wrote:
>
> > This drop off is due to mip mapping.
> >
> > You can improve quality by selecting linear_mipmap_linear filtering,
> > right now you have linear_mipmap_nearest, or nearest_mipmap_linear, I
> > forget which. This is also known by it's IrisGL nomenclature of
> > trilinear mipmapping. So set the pfTexture minfilter to
> > PFTEX_MIPMAP_TRILINEAR.
> >
> > Quality will still drop off but it will do so smoothly. Alternatively
> > you can select simple bilinear minification and you'll see aliasing
> > instead of the lower resolution filtering.
> >
> > Cheers,ANgus.
> >
> > ross::barna wrote:
> > >
> > > i am doing some detailed texture mapping (readable text and stuff) under
> > > pfLinux. i am wondering why there is an texture quality drop-off that
> > > appears to depend on distance from texture and window size. also, i would
> > > like to know if i can turn this off and render the entire texture in the
> > > same quality. is the artifact that is in the included image a feature of
> > > MipMapping?
> > >
> > > i want the highest fidelity renderings of the texture as possible.
> > >
> > > thanks,
> > >
> > > ross
> > >
> > > ------------------------------------------------------------------------
> > > Name: journalImage04.jpg
> > > journalImage04.jpg Type: JPEG Image (IMAGE/jpeg)
> > > Encoding: BASE64
> >
> >
>
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