Want to code a script that replicates radiosity illumination (light bounce) on props!

[Vioxtar]

[IMG]https://upload.wikimedia.org/wikipedia/commons/5/55/Radiosity_Comparison.jpg[/IMG]

What I have is on the left. What I want is on the right, [URL="https://en.wikipedia.org/wiki/Radiosity_(computer_graphics)"]radiosity[/URL]. Or in other words, a light bounce effect (technically diffuse reflection) applied globally on all props. Current 'dynamic light' in source does not calculate light bounce and renders direct illumination alone.

[B]What I'm looking for here is an idea or approach for a script that can provide a replication (doesn't have to be accurate, close enough is good enough) of light bouncing from an illuminated prop to another prop. [/B]This can perhaps be done with standard lights spawned upon tracer hits from a lamp colored the same as a prop's material, or even mess with shaders or other settings. I myself am not an amazing coder and don't have much knowledge in what lua can provide me with, but I can learn.

Some guidance questions are for example: Can I calculate the RGB value of a prop's default, uncolored material using trace.HitPos? What functions/libraries would I need to be looking at? Is messing with shaders in lua an option, or is that only exclusive to C? Are there already working scripts/similiar scripts I should be looking into?

If anyone has any suggestions on how I can go about doing this - please post! Fank you and have a lovely day<3

did it btw 2 guy who rated funny k thx bye

[MysteryPancake]

This probably isn't going to help at all, but (as someone who's barely used anything in it), the[URL="http://wiki.garrysmod.com/page/Category:render"] render library [/URL]could be useful if you can figure out what all the functions in it do (which I can't seem to). I suppose [URL="http://wiki.garrysmod.com/page/render/ReadPixel"]render/ReadPixel[/URL] may be a start in trying to find the RGB of a prop (or any pixel of anything on the screen), but of course it'd be shaded...

[Vioxtar]

Thanks Pan. It's definitely somewhere in the render library, looking into that atm

Anyone else got an idea?

[dingusnin]

You are not going to have an easy time.
Try using materials like with a shadow map, and modify the material of all brushes. You would have to bake it though, i don't think you would have enough power to do it in run time with Lua. Second guess would be using a module.

[disseminate]

[QUOTE=dingusnin;49412092]You are not going to have an easy time.
Try using materials like with a shadow map, and modify the material of all brushes. You would have to bake it though, i don't think you would have enough power to do it in run time with Lua. Second guess would be using a module.[/QUOTE]

He doesn't have to do it in real time - it's an interesting idea. Trace through every pixel with some reflections of traces, get the light level, add a fraction of it to the pixel. For blurring, do a bunch of traces in each reflection.

[Vioxtar]

[QUOTE=dingusnin;49412092]You are not going to have an easy time.
Try using materials like with a shadow map, and modify the material of all brushes. You would have to bake it though, i don't think you would have enough power to do it in run time with Lua. Second guess would be using a module.[/QUOTE]

This being nearly my only lead, mind going into slightly more specifics? Like, what's a shadow map or brushes?

[QUOTE=Disseminate;49412121]He doesn't have to do it in real time - it's an interesting idea. Trace through every pixel with some reflections of traces, get the light level, add a fraction of it to the pixel. For blurring, do a bunch of traces in each reflection.[/QUOTE]

What do you mean trace through every pixel with some reflections of traces?