ComfyUI Node: Load Motion Traj Preset

Load Motion Traj Preset:

The Load Motion Traj Preset node is designed to facilitate the loading of predefined motion trajectories for objects within your AI-generated scenes. This node allows you to select from a variety of preset motion trajectories and specify the length of the frames for the trajectory. By leveraging this node, you can easily incorporate complex and dynamic object movements into your projects without the need for manual trajectory creation. This can significantly enhance the realism and dynamism of your AI-generated animations, making it a valuable tool for AI artists looking to add sophisticated motion effects to their work.

Load Motion Traj Preset Input Parameters:

motion_traj

The motion_traj parameter allows you to select a predefined motion trajectory from a list of available options. Each option corresponds to a specific trajectory pattern that the object will follow. This parameter is crucial as it defines the path and movement style of the object within the scene. The available options are predefined and can include various types of motion such as swaying, curving, and more. Selecting the appropriate trajectory can greatly impact the visual outcome of your animation.

frame_length

The frame_length parameter specifies the number of frames over which the selected motion trajectory will be applied. This integer parameter determines the duration of the motion, with a default value of 16 frames. Adjusting the frame length allows you to control the speed and smoothness of the object's movement. A shorter frame length results in a quicker motion, while a longer frame length provides a more gradual and extended movement.

Load Motion Traj Preset Output Parameters:

POINTS

The POINTS output parameter returns a JSON string that contains the coordinates of the points defining the selected motion trajectory. This output is essential as it provides the detailed path information that can be used by other nodes or components in your project to animate the object according to the specified trajectory. The JSON format ensures that the data is easily readable and can be seamlessly integrated into various workflows.

Load Motion Traj Preset Usage Tips:

• Experiment with different motion_traj options to find the trajectory that best fits the desired motion style for your object.
• Adjust the frame_length parameter to fine-tune the speed and smoothness of the object's movement, ensuring it matches the overall timing of your animation.
• Use the POINTS output in conjunction with other nodes to create complex animations that involve multiple objects or synchronized movements.

Load Motion Traj Preset Common Errors and Solutions:

FileNotFoundError: [Errno 2] No such file or directory

• Explanation: This error occurs when the specified trajectory file cannot be found in the expected directory.
• Solution: Ensure that the motion_traj parameter is set to a valid option and that the corresponding file exists in the examples/trajectories directory.

ValueError: invalid literal for int() with base 10

• Explanation: This error occurs when the trajectory file contains non-integer values that cannot be converted to coordinates.
• Solution: Verify that the trajectory file contains valid integer coordinates in the correct format (x,y) for each line.

JSONDecodeError: Expecting value

• Explanation: This error occurs when the output JSON string is not properly formatted.
• Solution: Check the trajectory file for any formatting issues or invalid characters that might cause the JSON conversion to fail.