Comments on: 6. GLSL Materials

By: Clundquist

Clundquist — Mon, 24 Oct 2011 07:04:17 +0000

The easiest way is using a uniform and setting it in the application code. Normally you want to have fewer lights enabled on lower performance machines so you can keep frame rate.

By: Igors

Igors — Mon, 26 Sep 2011 13:33:59 +0000

Thanks for the helpful tutorials. My question is: how to detect lights count to calculate illumination in loop

for (int i = 0; i < numLights; ++i) { // where to get numLights?
…
}

Thanks
Igors

By: [GLSL] ADS shader « 逍遙文工作室

[GLSL] ADS shader « 逍遙文工作室 — Tue, 02 Aug 2011 19:35:07 +0000

[...] 參考：Swiftless Tutorials GLSL Materials、我寫的Specular(鏡射光)。 [...]

By: Swiftless

Swiftless — Mon, 19 Jul 2010 03:49:28 +0000

Hi Mitch,

You are totally correct with what you have read, and I should update the tutorial to comply, thats a mistake on my part.

It is required to normalize your variables in your fragment shader instead of your vertex shader, and this is explained on Lighthouse3D in detail as to why.

Cheers,
Swiftless

By: Mitch

Mitch — Mon, 19 Jul 2010 03:39:55 +0000

This is very helpful, thank you.

I have heard from Lighthouse3D that the normal may be normalized twice: once in the vertex shader and again in the fragment shader. I know I have proven to be somewhat of a newbie (as I am), but when I substitute vertex_normal for vec3 fragment_normal = normalize(vertex_normal); I see a less vertex-ish lighting. Let me know what you think.

By: Beatriz

Beatriz — Sat, 03 Apr 2010 11:01:55 +0000

Love your new website, congratulations!