Post import - Updating alembic path does not update scene ?

nicholas_yue

In our workflow, there are situations where we might need to update the path of the alembic file in the scene downstream.

I did some experimentation (manually via a C4D interactive session) with that but found that after updating the file path, there is no update to the scene. Is there something else I need to do to get C4D to re-read the alembic file content ?

Cheers

Manuel

hi,

I can't really reproduce the issue here (or i don't understand it)

something like this is working. Using either the bracket or the SetParameter function is working.

import c4d
from c4d import gui
# Welcome to the world of Python


# Main function
def main():
    filePath  =  "C:\\bendcube.abc"
    alembicPath = "/Cube/Cube_1/CubeShape"
    
    op[c4d.ALEMBIC_PATH] = filePath
    op[c4d.ALEMBIC_IDENTIFIER] =  alembicPath
    c4d.EventAdd()
    
    print "using setparameter"
    filePathID = c4d.DescID(c4d.ALEMBIC_PATH)
    
    alembicID = c4d.DescID ( c4d.ALEMBIC_IDENTIFIER)
    op.SetParameter(filePathID, filePath, c4d.DESCFLAGS_SET_USERINTERACTION )
    op.SetParameter(alembicID, alembicPath, c4d.DESCFLAGS_SET_USERINTERACTION )
    c4d.EventAdd()
# Execute main()
if __name__=='__main__':
    main()

Cheers,
Manuel

nicholas_yue

@m_magalhaes I was attempting to change the path to the alembic file in the UI of Cinema4d to understand how C4D handles alembic file before diving into python script, yes, eventually, the path swap will also be done via scripting. Is changing the path to the alembic file all that is required or do I have to click some other button to get C4D to rebuild the hierachy in C4D ? I am changing the path to the alembic file that was already loaded in C4D

Manuel

hi,

you have to change the filepath and the object identifier. (the path inside the alembic file)

Cheers,
Manuel

nicholas_yue

@m_magalhaes Is there a way to get Cinema4D to update the object identifier ? When I import an alembic file, Cinema4D builds a hierarchy and all the paths recursively. Is there a way to tell Cinema4D to rebuild that hierarchy or is deleting and re-importing the only way to get the object identifier rebuilt ?

Manuel

hi,

well the alembic files can contain multiple objects sot there's no way for Cinema 4D to know witch one you want.
If your alembic file have an entire hierarchy, your only option is to remove the actual alembic object and re-import a new one.
That should build the new hierarchy for all the content of your alembic file

Cheers,
Manuel

Manuel

hi,

I'll set this thread to solved without further feedback

Cheers,
Manuel