C4D AttributeError Deformed Object

2024-01-24 12:32 UTC gpt-4

You

This was working:

import c4d import csv import os

def find_export_object(root): # Recursively search for the object named ‘Export’ in the hierarchy if root is not None: if root.GetName() == ‘Export’: return root for child in root.GetChildren(): found_object = find_export_object(child) if found_object is not None: return found_object return None

def export_to_csv(csv_filename, points): try: # Open the CSV file in append mode with open(csv_filename, ‘a’, newline=”) as csvfile: csvwriter = csv.writer(csvfile)

        # Loop through each point and write its coordinates
        for point in points:
            x = point.x
            y = point.y
            z = point.z
            csvwriter.writerow([x, y, z])
    print(f'Data appended to {csv_filename}')
except Exception as e:
    print(f'Error: {e}')

def get_next_filename(base_path, base_filename): version = 1 while True: new_filename = f”{base_filename}_{version}.csv” full_path = os.path.join(base_path, new_filename) if not os.path.exists(full_path): return full_path version += 1

def main(): # Get the active document doc = c4d.documents.GetActiveDocument() if doc is None: c4d.gui.MessageDialog(“No active document found.”) return

# Find the object named 'Export'
export_object = find_export_object(doc.GetFirstObject())
if export_object is None:
    c4d.gui.MessageDialog("Object named 'Export' not found in the scene.")
    return

# Specify the CSV file directory
base_path = r'C:\Users\Chris\OneDrive\Desktop\Test'
base_filename = 'file'

# Manually set the frames per second (FPS)
fps = 12

# Get the next available filename before the frame loop
csv_filename = get_next_filename(base_path, base_filename)

# Determine the start and end frames
start_frame = int(doc.GetMinTime().GetFrame(fps))
end_frame = int(doc.GetMaxTime().GetFrame(fps))

for frame in range(start_frame, end_frame + 1):
    doc.SetTime(c4d.BaseTime(frame, fps))
    c4d.EventAdd()

    # Get the deformed state of the object
    deformed_object = c4d.utils.SendModelingCommand(
        command=c4d.MCOMMAND_CURRENTSTATETOOBJECT,
        list=[export_object],
        doc=doc
    )[0]

    if deformed_object is not None:
        # Get the points of the spline
        points = deformed_object.GetAllPoints()

        # Append the data to the CSV file for this frame
        export_to_csv(csv_filename, points)

        # Delete the temporary object after use
        temp_doc = c4d.documents.BaseDocument()
        temp_doc.InsertObject(deformed_object)
        c4d.documents.KillDocument(temp_doc)

print("Export completed.")

Execute the main function

if name == “main”: main()

But now it’s throwing the error:

Traceback (most recent call last): File “C:\Users\Chris\AppData\Roaming\Maxon\Maxon Cinema 4D 2023_BCDB4759\library\scripts\Spotify Scripts\Lines\Export_Points_Animated_Lines.py”, line 95, in main() File “C:\Users\Chris\AppData\Roaming\Maxon\Maxon Cinema 4D 2023_BCDB4759\library\scripts\Spotify Scripts\Lines\Export_Points_Animated_Lines.py”, line 81, in main points = deformed_object.GetAllPoints() AttributeError: ‘c4d.BaseObject’ object has no attribute ‘GetAllPoints’. Did you mean: ‘GetAllBits’?

ChatGPT

The error message you’re encountering indicates that the deformed_object variable, which is an instance of c4d.BaseObject, does not have the method GetAllPoints(). This is likely because deformed_object is not the type of object you expect it to be. In Cinema 4D (C4D), not all BaseObject types have a GetAllPoints() method. This method is typically available for objects that are point-based, like splines or polygon objects.

Here are a few things to consider and check:

1. Object Type Verification: Before calling GetAllPoints(), you should verify that deformed_object is indeed a point-based object, like a spline or a polygon object. You can do this by checking the object’s type against C4D’s object type constants. For example, if you are expecting a spline, check if deformed_object.GetType() == c4d.Ospline.

2. Object Conversion: The SendModelingCommand with MCOMMAND_CURRENTSTATETOOBJECT is used to convert a procedural or parametric object to its current state as a polygon or spline object. Ensure that the object you’re trying to convert is suitable for this operation.

3. Error Handling: It’s good practice to add error handling around the critical operations. For instance, check if SendModelingCommand actually returns an object before trying to use it.

4. Script Context: Make sure that the script is being executed in the correct context where the necessary objects and states are available.

Here’s a modified snippet of your main function incorporating these suggestions:

# ... [earlier code] ...

for frame in range(start_frame, end_frame + 1):
    doc.SetTime(c4d.BaseTime(frame, fps))
    c4d.EventAdd()

    result = c4d.utils.SendModelingCommand(
        command=c4d.MCOMMAND_CURRENTSTATETOOBJECT,
        list=[export_object],
        doc=doc
    )

    if result:
        deformed_object = result[0]

        # Check if the deformed_object is a point-based object (e.g., spline, polygon object)
        if deformed_object.GetType() == c4d.Opolygon or deformed_object.GetType() == c4d.Ospline:
            points = deformed_object.GetAllPoints()
            export_to_csv(csv_filename, points)

            # Delete the temporary object after use
            temp_doc = c4d.documents.BaseDocument()
            temp_doc.InsertObject(deformed_object)
            c4d.documents.KillDocument(temp_doc)
        else:
            print("Error: Deformed object is not a point-based object.")
    else:
        print("Error: No result from SendModelingCommand.")

print("Export completed.")

# ... [rest of your code] ...

This will ensure that the script only attempts to call GetAllPoints() on objects that actually have this method, preventing the AttributeError. If the error persists or if the issue is different than expected, further investigation into the specific objects and their types in your C4D scene might be necessary.

You

Please combine the two pieces of code

ChatGPT

Certainly! I’ll combine the two code snippets for you. The revised script will include the error checking and type verification for the deformed_object in the main function, as discussed earlier. Here’s the combined script:

import c4d
import csv
import os

def find_export_object(root):
    # Recursively search for the object named 'Export' in the hierarchy
    if root is not None:
        if root.GetName() == 'Export':
            return root
        for child in root.GetChildren():
            found_object = find_export_object(child)
            if found_object is not None:
                return found_object
    return None

def export_to_csv(csv_filename, points):
    try:
        # Open the CSV file in append mode
        with open(csv_filename, 'a', newline='') as csvfile:
            csvwriter = csv.writer(csvfile)

            # Loop through each point and write its coordinates
            for point in points:
                x = point.x
                y = point.y
                z = point.z
                csvwriter.writerow([x, y, z])
        print(f'Data appended to {csv_filename}')
    except Exception as e:
        print(f'Error: {e}')

def get_next_filename(base_path, base_filename):
    version = 1
    while True:
        new_filename = f"{base_filename}_{version}.csv"
        full_path = os.path.join(base_path, new_filename)
        if not os.path.exists(full_path):
            return full_path
        version += 1

def main():
    # Get the active document
    doc = c4d.documents.GetActiveDocument()
    if doc is None:
        c4d.gui.MessageDialog("No active document found.")
        return

    # Find the object named 'Export'
    export_object = find_export_object(doc.GetFirstObject())
    if export_object is None:
        c4d.gui.MessageDialog("Object named 'Export' not found in the scene.")
        return

    # Specify the CSV file directory
    base_path = r'C:\Users\Chris\OneDrive\Desktop\Test'
    base_filename = 'file'

    # Manually set the frames per second (FPS)
    fps = 12

    # Get the next available filename before the frame loop
    csv_filename = get_next_filename(base_path, base_filename)

    # Determine the start and end frames
    start_frame = int(doc.GetMinTime().GetFrame(fps))
    end_frame = int(doc.GetMaxTime().GetFrame(fps))

    for frame in range(start_frame, end_frame + 1):
        doc.SetTime(c4d.BaseTime(frame, fps))
        c4d.EventAdd()

        result = c4d.utils.SendModelingCommand(
            command=c4d.MCOMMAND_CURRENTSTATETOOBJECT,
            list=[export_object],
            doc=doc
        )

        if result:
            deformed_object = result[0]

            # Check if the deformed_object is a point-based object (e.g., spline, polygon object)
            if deformed_object.GetType() == c4d.Opolygon or deformed_object.GetType() == c4d.Ospline:
                points = deformed_object.GetAllPoints()
                export_to_csv(csv_filename, points)

                # Delete the temporary object after use
                temp_doc = c4d.documents.BaseDocument()
                temp_doc.InsertObject(deformed_object)
                c4d.documents.KillDocument(temp_doc)
            else:
                print("Error: Deformed object is not a point-based object.")
        else:
            print("Error: No result from SendModelingCommand.")

    print("Export completed.")

# Execute the main function
if __name__ == "__main__":
    main()

This script should now handle the specific error you encountered by verifying the type of the deformed_object before attempting to call GetAllPoints(). Remember to run this script in an environment where Cinema 4D’s Python module (c4d) is available, typically within the Cinema 4D application itself.

You

Error: Deformed object is not a point-based object. Export completed.

ChatGPT

The error message “Error: Deformed object is not a point-based object.” suggests that the object returned by SendModelingCommand is not a spline or polygon object, which are the types of objects that have the GetAllPoints() method.

To address this, let’s modify the script to handle different types of objects correctly. The SendModelingCommand function can return different types of objects based on what is being passed to it. If the object you’re trying to export is not inherently a spline or polygon but another type (like a parametric object), the command might not convert it to a point-based object as expected.

Here are a few steps to diagnose and potentially fix the issue:

1. Check the Type of the Original Object: First, check the type of the export_object to understand what kind of object you are dealing with.

2. Adjust the Command or Processing Based on the Object Type: If the object type is not what you expect, you may need to adjust how you process it. For example, if it’s a generator object, you might need to use a different approach to extract its points.

3. Debugging Information: Adding print statements to output the type of the deformed_object can help in understanding what’s going wrong.

Here’s an updated version of your main function with these considerations:

def main():
    # ... [previous code] ...

    for frame in range(start_frame, end_frame + 1):
        doc.SetTime(c4d.BaseTime(frame, fps))
        c4d.EventAdd()

        result = c4d.utils.SendModelingCommand(
            command=c4d.MCOMMAND_CURRENTSTATETOOBJECT,
            list=[export_object],
            doc=doc
        )

        if result:
            deformed_object = result[0]

            # Debugging: Print the type of the deformed_object
            print(f"Type of deformed object: {deformed_object.GetType()}")

            if deformed_object.GetType() == c4d.Opolygon or deformed_object.GetType() == c4d.Ospline:
                points = deformed_object.GetAllPoints()
                export_to_csv(csv_filename, points)

                # Delete the temporary object after use
                temp_doc = c4d.documents.BaseDocument()
                temp_doc.InsertObject(deformed_object)
                c4d.documents.KillDocument(temp_doc)
            else:
                print("Error: Deformed object is not a point-based object.")
        else:
            print("Error: No result from SendModelingCommand.")

    print("Export completed.")

# ... [rest of your code] ...

Run this updated script in your Cinema 4D environment. The print statement will output the type of the deformed_object, which can give you a clue about why it’s not being recognized as a point-based object. Depending on the output, you may need to adjust your approach for handling different types of objects.