KeyFrame User Data from Xpresso driven User Data

JoelJohera

To whom it may concern,

I have an object that has two user data fields.

I know that an Xpresso-driven user data field can not be animatable using keyframes, which is why I have the user data field keyframes. If I manually put the keyframes in the user data field keyframes with the same data as the Xpresso Driven user data field, everything works. However, I want it to make it work with a Python script, so I do not need to do the keyframes manually. I tried with this script:

import c4d
from c4d import gui

def main():
    doc = c4d.documents.GetActiveDocument()
    obj = doc.SearchObject('Cube')
    desc_id_keyframes = None
    value = None
    user_data_container = obj.GetUserDataContainer()
    for desc_id, bc in user_data_container:
        if bc[c4d.DESC_NAME] == "Xpresso Driven":
            value = obj[desc_id]
        elif bc[c4d.DESC_NAME] == "KeyFrames":
            desc_id_keyframes = desc_id
    
    print(value)
    print(desc_id_keyframes)
    
    track = c4d.CTrack(obj, desc_id_keyframes)
    
    if not obj.FindCTrack(desc_id_keyframes):
        obj.InsertTrackSorted(track)
    
    curve = track.GetCurve()
    time = c4d.BaseTime(0, doc.GetFps())
    result = curve.AddKey(time)
    key = result["key"]
    key.SetValue(curve, value)
    c4d.EventAdd()
    
if __name__=='__main__':
    main()

However, the keyframe does not get inserted:

What am I doing wrong?

Thanks in advance for the help.
Regards,
Joel Johera

JoelJohera

Solved.

I need to change this part:

track = obj.FindCTrack(desc_id_keyframes)
if track is None:
   track = c4d.CTrack(obj, desc_id_keyframes)
   obj.InsertTrackSorted(track)

ferdinand

Hey @JoelJohera,

it is kind of hard to follow your question and solution, as the former lacks a scene for context and for the latter I am not quite sure what you fixed. But when it works for you I am happy

Cheers,
Ferdinand