Changing OCIO View Transform doesn't work using Python

Smolak

It looks like changing OCIO View Transform doesn't work using Python

import c4d
import maxon

def main():
    # Get the active document
    doc = c4d.documents.GetActiveDocument()
    if not doc:
        print("No active document found")
        return

    # Create a new OCIO Config object
    ocio_config = maxon.c4d.documents.OpenColorIOConfig()

    # Load the OCIO configuration file (replace with your actual path)
    ocio_config_path = "$OCIO"
    result = ocio_config.Load(ocio_config_path)
    if result != c4d.OPEN_COLOR_IO_OK:
        print("Error loading OCIO configuration")
        return

    # Set the OCIO view transform
    ocio_view_transform = "3"  # Replace with your desired view transform
    ocio_config.SetViewTransform(ocio_view_transform)

    # Apply the OCIO configuration to the current document
    doc.SetOcioConfig(ocio_config)

    c4d.EventAdd()

# Only execute the main function if the script is run directly
if __name__ == '__main__':
    main()

This simple version doesn't work too :

import c4d

def main():
    # Get the active document
    doc = c4d.documents.GetActiveDocument()
    if not doc:
        print("No active document found")
        return

    # Set the OCIO view transform
    view_transform = "3"  # Replace with your desired view transform
    doc[c4d.DOCUMENT_OCIO_VIEW_TRANSFORM] = view_transform

    c4d.EventAdd()

if __name__ == "__main__":
    main()

ferdinand

Hey @Smolak,

Thank you for reaching out to us. I assume your code came from a chat bot, because pretty much every line in it is hallucinated. The Python API currently has no OCIO API, only C++ has (and it does not work like what your code shows).

We are currently working on the Python OCIO API, which will then also allow you to set the view transform of a document. It will shipped with a future version of Cinema 4D, but as always, we cannot give out more concrete information about a when. But it will be quite soon.

Cheers,
Ferdinand

Smolak

Thank you @ferdinand for answer. Yes, most of the code is from chat but when I create Xpresso python it shows this command :

ferdinand

Hey @Smolak,

I understood what you wanted to do, but it is still not possible. First of all, the OCIO color space enum values are dynamically assigned, i.e., the value 3 might not always mean the same space. In the OCIO API there are special conversion functions for that, but you could also do that manually by parsing the description of the document.

But you will never be able to apply such value then, because to do that, you have to call BaseDocument::UpdateOcioColorSpaces which does not exist in Python (yet). See the C++ Docs for an example.

Cheers,
Ferdinand