NesterDC Bileniar filter

This forum is for discussion pertaining to homebrew and indie software for the Dreamcast, such as homebrew games, emulators/interpreters, and other homebrew software/applications. Porting requests and developmental ideas are not to be made here; you can make those here. If you need any help burning discs for homebrew software, this is the place to ask as well.
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Shinji_the_Stampede
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NesterDC Bileniar filter

Post by Shinji_the_Stampede » Mon Mar 18, 2002 11:11 pm

can anyone tell me what this does? I didn't download the dialy nester with it yet i just wanted to know what it does.
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Post by Tyne » Tue Mar 19, 2002 10:39 am

Smooths out the graphics by bluring pixels making it look nice.
I for one think it's useless since TV's do this to NES games anyways!
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Post by The Kron » Tue Mar 19, 2002 10:42 am

It also makes a bigger impact depending on how you connect your Dreamcast to your TV.

If you use an RGB Scart lead as a connector it will display the games in a very clear high resolution.
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Post by fatheadpi » Tue Mar 19, 2002 12:49 pm

wonder what it'll do for a vga monitor...
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Post by Oz » Tue Mar 19, 2002 1:06 pm

Here is a little more detailed explanation I did in another thread:

http://www.dcemulation.org/phpBB/viewto ... highlight=
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Post by fatheadpi » Tue Mar 19, 2002 1:15 pm

And a fine post it is! Arr matey.
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Post by 404NotFound » Tue Mar 19, 2002 2:24 pm

Nice explanation! Maybe in the future we might get.. dare i say it.... trilinear filtering?
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Post by The Kron » Tue Mar 19, 2002 2:33 pm

Im pretty sure the Power VR2 hardware isnt capable of Tri-Linear filtering.
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Post by 404NotFound » Tue Mar 19, 2002 2:35 pm

Parappa wrote:Im pretty sure the Power VR2 hardware isnt capable of Tri-Linear filtering.
Yeah i guess it's just a pipe dream...

I always wondered.. did the term "pipe dream" come from tripping while smoking a pipe?
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Post by Heliophobe » Tue Mar 19, 2002 3:53 pm

Parappa wrote:Im pretty sure the Power VR2 hardware isnt capable of Tri-Linear filtering.

I'm not entirely sure it isn't. In the documentation for PowerVR in the Dreamcast it mentions in the bitfield where you set what kind of filtering you want (none or bilinear) that trilinear is one of the options. Whenever I set it, I ended up with no visible texture. It might mean that it was a feature supported in some chips in the PowerVR family but not the particular model used in the Dreamcast, or perhaps it is supported but some other polygon setting I was using is incompatible with trilinear filtering.
I always wondered.. did the term "pipe dream" come from tripping while smoking a pipe?
Yeah, specifically, opium-induced fantasies, according to Merriam Webster (http://www.m-w.com) anyway.
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Post by Mr.TA » Tue Mar 19, 2002 6:58 pm

The PVRDC chip has support for Bi-linear, Tri-linear, and Anisotropic texture filtering. However, 99% of games will only use Bi-linear filtering. Tri-linear and Anisotropic filtering (da best) cost a bit more fillrate and are rarely used.

Thats not to say there's no games that don't use the other types of filtering...Test Drive:Le Mans uses Tri-linear (or is Anisotropic?) texture filtering along with a TON of other effects and a real-time clock and I may say it's one of the best sim type racers ever made!

How's that for OT? :D
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