Per pixel lighting

roelor · Post by **roelor** » Thu Dec 23, 2010 12:42 am

How can I use per pixel lighting without using parralax or bump on a mesh? (so only per pixel lighting).

slavik262 · Post by **slavik262** » Thu Dec 23, 2010 4:14 am

The easiest way to do it would be to use the parralax shader with a flat normal map.

The better and faster (performance-wise) way to do it would be to write a shader in HLSL or GLSL. Tutorial 10 won't teach you how to write shaders, but it does show you how to hook them up to Irrlicht.

roelor · Post by **roelor** » Mon Dec 27, 2010 11:47 pm

Hmm thanks, I found this: http://wiki.truevision3d.com/hlsl_phong_sample
Don't know if its useful for Irrlicht, but hey. It's a start.

ent1ty · Post by **ent1ty** » Tue Dec 28, 2010 12:01 pm

If you want, i can post my GLSL per pixel lighting shader. Diffuse lighting, up to 8 lights and supports both point and spot lights

Some Screens

slavik262 · Post by **slavik262** » Tue Dec 28, 2010 1:04 pm

roelor wrote:Hmm thanks, I found this: http://wiki.truevision3d.com/hlsl_phong_sample
Don't know if its useful for Irrlicht, but hey. It's a start.

This looks like a pretty cool tutorial to at least show you the basics. Just know that with Irrlicht, you don't need to mess with techniques or passes. You specify the shader models in your call to IGPUProgrammingServices:addHighLevelShaderMaterial.

Also know that the tutorial has you writing some extra code to show you how Phong shading works. There's a built-in HLSL function called lit that does a lot of the work for you. See http://msdn.microsoft.com/en-us/library ... S.85).aspx (highlight it and copy it into your URL bar, the Irrlicht forum doesn't hyperlink the whole thing when it hits parens for some reason).