Old Hardware vs Vertex/Pixel Shaders

hub · Post by **hub** » Sat Sep 11, 2004 4:30 pm

Is there any way to get my geforce2mx to support vs/ps via some emulation? (don't tell me to use the default rasterizer - I just want to emulate this stuff not all rendering/rasterization process.) And so, I seem to be the only one dissatisfied with the introduction of shaders into Irrlicht

r2d2 · Post by **r2d2** » Sat Sep 11, 2004 5:01 pm

IMPOSSIBLE

hub · Post by **hub** » Sat Sep 11, 2004 5:04 pm

Impossible to be dissatisfied or to emulate?

Anyway thanks!

ventilator · Post by **ventilator** » Sat Sep 11, 2004 5:42 pm

vertex shaders can be emulated in software with directx but i don't know how to enable this with irrlicht. emulating pixel shaders isn't possible.

Jedive · Post by **Jedive** » Sat Sep 11, 2004 6:37 pm

I seem to be the only one dissatisfied with the introduction of shaders into Irrlicht

What's the problem with shaders? If you don't want them, just don't use them. You still have the features of previous versions.

r2d2 · Post by **r2d2** » Sat Sep 11, 2004 9:03 pm

Yeah its possible if you code special software drivers but thats VERY slow. And it's also VERY difficult.

Jedive · Post by **Jedive** » Sat Sep 11, 2004 9:05 pm

Yeah, definitely not worth the effort. After all, you can get a shader-capable card for 100 - 120 €.

Luke923 · Post by **Luke923** » Sun Sep 12, 2004 8:24 pm

Actually, DirectX emulates vs1.1 on the CPU rather quickly - although, not as fast as on the GPU. ps any version, however, doesn't emulate well, and can be quite slow. Luckily, the code for emulation of vs1.1 is the EXACT same code for writing to the GPU as DirectX handles all the emulation.

Hope that helps.

ssbfalcon · Post by **ssbfalcon** » Mon Sep 13, 2004 9:25 pm

Wait... is the geforce2mx better or older than Geforce 2 GTS? I got vertex shaders to work under Open GL...

Guest · Post by **Guest** » Fri Sep 17, 2004 4:04 pm

Thanks for all the feedback!
I've found that GTU (GeForce Tweaking Utility) is capable of forcing NV20 emulation (and NV25 but it requires some specific drivers.) It seems to be pretty fast and works fine, yet still I feel it's high tome to upgrade my hardware:)
Oh, Jedive, what I meant was that there was such a nice feature implemented and I couldn't use it. I'm far from considering per-pixel lighting inferior to the standad OGL lighting:)

hub · Post by **hub** » Fri Sep 17, 2004 4:32 pm

Last one was mine...