Use CSV/XML file to drive shader

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Valentin Nicolini asked · Jul 25 at 02:05 PM

Use CSV/XML file to drive shader

Hi,

on my current project i'm trying to have something efficiently set and easily manageable.

What i'd like is to use an XLSX files that i made that contains :
column A = ID
column B = Name
column C to E = R G B value as float

The XLSX file will be converted to either CSV or XML but i don't know which one.

I also don't know how to use the file i have to actually drive the color value depending on the attribute value of my object.

There's one line of said file

6Light green0,7610,8550,722

Let's say my object has an attribute called "materialName" and it's value is "Light green". I'd like that at rendertime, it automatically fetch the RGB value in my file and inject them to my shader accordingly (via a UserDataRGB node i guess).

I don't know if i'm clear to be honest, i hope i am ^^

Thanks for the answer

shader katana

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Answer 1 · 2020-07-25T20:47:02Z

Mads Drøschler answered · Jul 25 at 08:47 PM

Try look here.

https://www.facebook.com/groups/OSL.Shaders/permalink/492412244875233/

Link to files.

https://github.com/qmasingarbe/osl-shaders/tree/master/TextShader

He loads the vec2 into the shader as points and draw them in shade space.
You can extend it to a normal 3 float vector(x,y,z);

Maybe you can find some inspiration to dump xml data to shaders that Arnold will render like this. If that is what you need.

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