Q: Texture map "flickering"

[Audrius Stundzia]

<x-flowed>Hi Per,

Thanks for your explanations.

I'd like to ask the (very busy) vtk developers to add mipmaps to
their to-do list.

Regards,

Audrius


>From: Per Ekman <pek at pdc.kth.se>
>To: audrius at adv-biologic.com
>Subject: Re: Q: Texture map "flickering"
>Date: 02 Dec 1999 16:10:40 +0100
>
>"Audrius Stundzia" <adv_biologic at hotmail.com> writes:
>
> > Hi Per,
> >
> > Thanks for your help. Much appreciated.
> >
> > Two questions:
> >
> > 1) Do you know how I can check whether or not a graphics card
> > supports multisampling, ie., a test I can run at the terminal?
>
>Unfortunately not, but it should say in the manual or perhaps
>on Suns webpages. Multisampling is usually something you brag
>about if your hardware can do it.
>
> > 2) What is mipmaps? Is this a OpenGL switch? A vtk switch?
>
>Mipmapping is when you create several versions of your texture
>at different resolutions. You use the ones with high resolution
>when the texture is close and those with lower resolution when
>the texture is farther away. They are essentially the same thing
>as multisampling, the difference is that the multisampling is done
>beforehand instead of at runtime. If you can create high-quality
>mipmaps and your software/hardware supports mipmaps, you should
>be able to get rid of the flicker (if indeed subsampling is the
>problem).
>
>Sincerely
>Per Ekman

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</x-flowed>