"Traditional family values stand very strong here in Europe. One proof is that most of us have been married several times."
- Göran Persson (s)
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Volumetric lighting demo
Sunday, January 12, 2003 | Permalink

So I explore into Direct3D a little again. This time it's DX9 and the first demo utilizing it is here.
It's a demo of volumetric lighting through a 2.0 vertex shader.




Enter the code below

Thursday, January 16, 2003

Damn, no chance of us seeing a similar effect not using fragment programs in the future?

Hmmmmm next time I update my graphics card the GeForceFX will probably be about a year old heh.

Sunday, January 19, 2003

Why do you guys actually wait for a GeForce FX? ATI has already shown it's superiority over Nvidia with the Radeon 9700...

Monday, January 20, 2003

The Vertex Shader 2.0 can run on every system with dx9 in software, but this isn�t slow. (even 3.0 Vertex Shaders can be used)

Tuesday, January 21, 2003

I suppose you meant to way it IS too slow to use the software path rather than that it isn't. I get about 7fps with software vertex processing, compared to 100+ fps with hardware vertex processing.

Saturday, January 25, 2003

Is it technically possible on the 9700pro to implement the same solution as this, but say with perlin noise, for alpha.. or similar
..and did I say, I love the effect by the doorways.

Sunday, January 26, 2003

I don't quite get what kind of effect you're looking for.

Monday, January 27, 2003

well then.. I'll try to explane it better..
In this demo you have a spherical volumetric. fog/light in the centre of the scene. Is it possible to add a more complex function and still not suffer a big preformance hit? The type of function I was thinking of was something like a "fluffy cloud" using Perlin noise (or similar) to further manipulate the density/opacity of the vol.Light/fog .....hmm did'nt manage to speak anything but giberish this time either..
well icq me if you still have'nt got a qlue as to what I'm asking about

Monday, January 27, 2003

I suppose you could fake it by just adding some perlin noise function to the depth, but it's hard to do it the real way. You could of course though create some kind of cloud by using many small spheres though, but it would cause a heavy performance hit though.

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