I’m currently working with one project where I mess with OBJ sequences (recorded with Brekel Pro PointCloud), so I created a script that loads OBJ files from a folder and a Python Tag that plays through objects making them visible and invisible depending the current frame.

Import obj folder

import c4d, os
from c4d import storage as s
def main():
    extensions = ["obj"] # File extensions that will be imported
    folder = s.LoadDialog(c4d.FILESELECTTYPE_ANYTHING,'Select folder to import',c4d.FILESELECT_DIRECTORY,'') # Load folder
    if not folder: return # If there is no folder, stop the script
    files = os.listdir(folder) # Get files
    for f in files: # Loop through files
        ext = f.rsplit(".",1) # Get file extension
        if ext[1] in extensions: # If extension matches
            p = os.path.join(folder, f) # Full file path
            c4d.documents.MergeDocument(doc, p, 1) # Merge file to current project
    c4d.EventAdd() # Update Cinema 4D
if __name__=='__main__':
    main()

OBJ Sequence Player

This is Python Tag with some custom constrols on it. You can change starting frame, reverse sequence and animate manually with custom mode. Controls are in Python Tag.

import c4d

def main():
    frame = doc[c4d.DOCUMENT_TIME].GetFrame(doc[c4d.DOCUMENT_FPS]) # Get current frame
    obj = op.GetObject() # Get object
    children = obj.GetChildren() # Get children
    index = 0 # Initialize index variable
    run = 0 # Initialize run variable

    rev = op[c4d.ID_USERDATA,2] # User data: Reverse sequence
    start = op[c4d.ID_USERDATA,3] # User data: Starting frame
    holdf = op[c4d.ID_USERDATA,4] # User data: Hold first frame
    holdl = op[c4d.ID_USERDATA,5] # User data: Hold last frame
    manon = op[c4d.ID_USERDATA,7] # User data: Activate manual mode
    manfr = op[c4d.ID_USERDATA,8] # User data: Set manual frame

    if manon == False: # If manual mode is off
        if rev == False: # If reverse mode is off
            for child in children: # Loop through children
                if frame == index+start: # If index maches with current frame
                    child[c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 2 # Default
                    child[c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 2 # Default
                    run = 1 # Sequence is running
                else: # Otherwise
                    child[c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 1 # Off
                    child[c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 1 # Off
                index = index + 1 # Increase index
        else: # Otherwise
            for child in reversed(children): # Loop through reversed children
                if frame == index+start:
                    child[c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 2
                    child[c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 2
                    run = 1
                else: # Otherwise
                    child[c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 1
                    child[c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 1
                index = index + 1

        if holdf == True and run == 0: # If hold start frame is on
            if frame < len(children)+start: if rev == True: children[-1][c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 2 children[-1][c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 2 else: children[0][c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 2 children[0][c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 2 if holdl == True and run == 0: # If hold last frame is on if frame >= len(children)+start:
                if rev == True:
                    children[0][c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 2
                    children[0][c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 2
                else:
                    children[-1][c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 2
                    children[-1][c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 2
    else: # Manual mode is on
        for i, child in enumerate(children): # Loop through children
            if i == manfr: # If index is same as custom frame
                children[manfr][c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 2
                children[manfr][c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 2
            else: # Otherwise
                child[c4d.ID_BASEOBJECT_VISIBILITY_RENDER] = 1
                child[c4d.ID_BASEOBJECT_VISIBILITY_EDITOR] = 1

ar_tag_obj_sequence_player.c4d v1.0.1 (2023.1.2)