Overview of OSL Shaders in Octane

[v-cube]

This will be the first thing I will try tomorrow morning !!!

Thanks

Andreas

[v-cube]

thanks Roeland, this works!!!

cannot wait for this to run in my Rhino plugin...

my problem is that I am a little bit of an illiterate when it comes to coding, so I dare to post two additional wishes:

1. As I understand, right now the row offset is purely random, can you implement an option to make a fixed offset for every n row, so e.g. a) 2 row loop, 1. row +0%, 2.row +50% b) 4 row loop 1.row +0%,2.row +30%,3.row +40%,4.row +5%, so the user could define the number of rows until the pattern repeats, and the offset for each row?

2. Wish (I know, this is probably much harder to implement...) if we could add the possibility to define an "gap " between the tiles , which would be filled with a second material (e.g. mortar) we would have a very mighty brick simulator !

best

Andreas

[bepeg4d]

Hi Andreas,
have a look at this other shaders in this discussion:
viewtopic.php?f=33&t=63905&start=10#p325973
ciao beppe

[v-cube]

thanks beppe, I already tried this one, but this did not really do what I wanted ( maybe it was just me...) I can define brick height/ width, the mortar thickness/ material, but I cannot use multiple textures for the bricks, nor can I define different offsets for the rows... maybe you can give me a hint ?

best

Andreas

Hi Andreas,
have a look at this other shaders in this discussion:
viewtopic.php?f=33&t=63905&start=10#p325973
ciao beppe

[bepeg4d]

Hi Andreas,
it's a different approach compared with multi texture, but try with this version:

Code: Select all

shader brick(
        float thick=0.05,
        float rat=0.6,
        float  rep=2,
        color MainColor = color(1,0.23,0.13),
        color EdgeColor = color(0.9,0.9,0.9),
        output color c = 0 )
{
    color col  = MainColor;
    float x=rep*u;
    float y=rat*rep*v;
    
    if(mod(y, 2.0) < 1.0) x=x+0.5;
    
    x *= (1+0.7*noise("cell", y));
    
    float nx=x-floor(x);
    float ny=y-floor(y);
    
    if(nx>1-thick || ny<rat*thick) { 
        col = EdgeColor; 
    }
    else {
        float brg = 0.5*noise("cell", point(floor(x),floor(y),0))+0.3;    
        col = brg*MainColor;
    }
    c = col;
}

ciao beppe

[abstrax]

For anyone who is interested in writing OSL shaders, you can now find the information of the opening post here: https://docs.otoy.com/osl/

Any future changes, additional explanations, tutorials, examples, etc. will go to this page.

[funk]

For anyone who is interested in writing OSL shaders, you can now find the information of the opening post here: https://docs.otoy.com/osl/

Any future changes, additional explanations, tutorials, examples, etc. will go to this page.

Thanks guys. Is there any hope of getting the regular docs looking this good too?

[rohandalvi]

I’m not a programmer but I was curious about the overall ability of OSL in Octane. Since you can use OSL to build camera shaders , can something like the link given below be implemented into octane just via OSL.

http://matthias.hullin.net/publications ... SR2012.pdf

It’s something called a polynomial optics camera and the results look really nice. It mimics a full lens stack.

Just curious about it.

Regards
Rohan

[Goldorak]

I’m not a programmer but I was curious about the overall ability of OSL in Octane. Since you can use OSL to build camera shaders , can something like the link given below be implemented into octane just via OSL.

http://matthias.hullin.net/publications ... SR2012.pdf

It’s something called a polynomial optics camera and the results look really nice. It mimics a full lens stack.

Just curious about it.

Regards
Rohan

The OSL Camera is very powerful and designed to explore and implement these kinds of things. Custom OSL camera rigs and optical/projection filters will get their own category on LiveDB, where we plan to mirror Octane camera formats with their OSL implementations so you can customize them further. In future releases, we will cover more node types with OSL shaders.

[Renart]

Hello!

I've been trying to write my first OSL texture.
So far so good with the Docs and resources on internet.

There is one thing I'm not sure how to do one specific thing.

Code: Select all

   point Pos = P [[string label = "Projection",string inputType = "projection"]],

I've got this code that give me a Projection, but by default it's using the UV and I'm wondering how to force it to change to something like Box or Perspective.
And also how can I change the values of the Transform Projection? If I want to transform it directly in the code, like a 90 degree rotation of the projection.

Or if a Texture is plugged, is there a way to access its Projection transformation value to tweak them?

Thank you!