Is there a way I can control the rotation of a color map?

[ZlatinIvanov]

Is there a way I can control the rotation of a color map (Like Checker, Noise or any other map of color type) via Shader code? I am trying to manipulate the coordinates (Tiling, Offset and Rotation) of a PhoenixFDOceanTex which is type of color map but I am failing to do that. Can anyone help me ? Thank you!

[AlexeySmolenchuk]

Try this method:
https://github.com/AlexeySmolenchuk/hGeoPatterns/blob/eebc123ae1bdda64a326f9b8bb399c7b6545ceb5/osl/buildCoords.osl#L10

[ZlatinIvanov]

I found it in your source... Sorry
:D

[AlexeySmolenchuk]

This lines is only you need to rotate your uv's if you writing your own shader:

    if (angle !=0){
        float a = angle * M_PI;
        coord = vector( cos(a)*coord.x - sin(a)*coord.y, sin(a)*coord.x + cos(a)*coord.y, 0);
    }

[ZlatinIvanov]

Hi Alexey, https://github.com/ZlatinIvanov/OSL/blob/main/OceanTex_WIP_v7.osl , this is my progress far by now. As you can see in my code I have a lot of inputs for a color map. My idea is to make it only 1 input and rotate accordingly, because for now I use predefined rotations for each map but it is a bit messy and it's not a dynamic. I hope that will help to get the idea. Thank you :)

[AlexeySmolenchuk]

I would be happy to help, but I don't quite understand what is it.
Can you share more context, like where you are executing this and what the results look like, and show the graph (if it's a complex material)?

[ZlatinIvanov]

Thank you Alexey! You are my hope!!!
https://github.com/ZlatinIvanov/OSL Here I uploaded screenshots. I work in 3dsMax and I want to re-create an ocean texture with coordinated waves-direction. In "Shader-Look.jpg" you can see a simple Plane object with applied material, I have linked controllers to get the Ocean Parameters and Ocean Position to use them in the Shader. I use 16 Point Helpers (also with wired controllers to get the X-Y-Z position of each of them) to divide the Shader to 16 pieces and for now I use 16 color maps of Chaos VRay Ocean Textures which I rotated differently from 22.5 degrees each. My idea is to use only 1 map and to place it on each sector but to define the rotation depending on the sector it takes place. For example, the sector between Point Helper 1 and Point Helper 2 to have a map with rotation that correspond to the angle the 2 helpers define (I already have their position coordinates). Looking forward to hear from you If you have any suggestions. Thank you again!