Hi Christian
Hi all,
I was wondering if there are commonly used conventions which texture
units do what in 3D models used for realtime rendering (games etc).
For example I see that most 3D models enable texture unit #1 for the
diffuse texture, whereas unit #0 is unused most of the time.
Now what if the model also contained a bump or normal map? On which
texture unit would such maps typically use?
Would anyone have an example OSG file that uses both a diffuse and a
normal texture, rendered with the fixed function pipeline? I am trying
to get started with normal maps now and this would be a big help,
especially if such a model follows the usual conventions.
Why would you want to use fixed function pipeline here at all?
Usually you can put the textures to whatever unit you want, as long as
you create sampler uniforms with a name.
In my production pipeline, I don't have the additional textures (normal
map, specular map, height map, emission map, ...) in the model, but will
bind them with a visitor when loading/compiling the model.
So there is no typical for most of the cases. If you have a model
exported as FBX for instance, the loader will more or less determine the
texture unit used. Here you might want to visit the model and put the
stateset's textures to the samplers.
Cheers
Sebastian
Christian
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