Colored fog rendering

[kosua20]

Each age is supposed to be associated with a background color used for the fog. For now I'm only providing a color picker, as I was not able to find where this info is stored in the assets files / accessible through the API. Finding it and using it would help get closer to the in-game rendering.

[Deledrius]

The fog settings and color are stored in the Age's .fni file. They are literally a series of commands that are sent to the internal command parser and executed.

A common example is the city.fni which shows the usual settings for the Cavern:

Graphics.Renderer.Setyon 100000
Graphics.Renderer.Fog.SetDefLinear -1500 20000 1
Graphics.Renderer.Fog.SetDefColor .4 .3 .1
Graphics.Renderer.SetClearColor .4 .3 .1

The colors are float RGBs. You can look up these commands in the in-console help for more information on their parameters.

[kosua20]

Thank you very much! I had started to look at plFogEnvironment: it didn't seem to be loaded from the age/prp files, but I missed the fact that this was set up this way. I'll look into it!

[dpogue]

So plFogEnvironment is actually used to handle the fog settings at runtime, but the way it ends up working is that there's a single plFogEnvironment that exists for the pipeline and all objects use that fog. It actually works if you create plFogEnvironments and put them in the PRP files (although no artist-oriented tools, including Cyan's, allow this).

As for how we ended up in this situation...

The current fog system sucks. It was never meant to get used this way, but the production artists started using it with debug commands that were around, and before they could be stopped it was too late.
~ plDXPipeline.cpp, line 4320

[kosua20]

Thank you again, this is much clearer now and I should be able to apply this to PRPViewer easily. I would also like to use this as an opportunity to thank you and all the H-uru contributors! I couldn't have done this without libhsplasma.