Metahuman_DNA_Calibration/examples/dnacalib_rename_joint_demo.py

"""
This example demonstrates rename of a joint.
IMPORTANT: You have to setup the environment before running this example. Please refer to the 'Environment setup' section in README.md.

- usage in command line:
    python rename_joint_demo.py
    mayapy rename_joint_demo.py

    Expected: Script will generate Ada_output.dna in OUTPUT_DIR.
- usage in Maya:
    1. copy whole content of this file to Maya Script Editor
    2. change value of ROOT_DIR to absolute path of dna_calibration, e.g. `c:/dna_calibration` in Windows or `/home/user/dna_calibration`. Important:
    Use `/` (forward slash), because Maya uses forward slashes in path.

- customization:
    - change CHARACTER_NAME to Taro, or the name of a custom DNA file placed in /data/dna_files

Expected: Script will generate Ada_output.dna in OUTPUT_DIR from original Ada.dna.
NOTE: If OUTPUT_DIR does not exist, it will be created.
"""

from os import makedirs
from os import path as ospath

# if you use Maya, use absolute path
ROOT_DIR = f"{ospath.dirname(ospath.abspath(__file__))}/..".replace("\\", "/")
OUTPUT_DIR = f"{ROOT_DIR}/output"

CHARACTER_NAME = "Ada"

DATA_DIR = f"{ROOT_DIR}/data"
CHARACTER_DNA = f"{DATA_DIR}/dna_files/{CHARACTER_NAME}.dna"
OUTPUT_DNA = f"{OUTPUT_DIR}/{CHARACTER_NAME}_output.dna"

from dna import DataLayer_All, FileStream, Status, BinaryStreamReader, BinaryStreamWriter
from dnacalib import DNACalibDNAReader, RenameJointCommand


def load_dna(path):
    stream = FileStream(path, FileStream.AccessMode_Read, FileStream.OpenMode_Binary)
    reader = BinaryStreamReader(stream, DataLayer_All)
    reader.read()
    if not Status.isOk():
        status = Status.get()
        raise RuntimeError(f"Error loading DNA: {status.message}")
    return reader


def save_dna(reader, path):
    stream = FileStream(path, FileStream.AccessMode_Write, FileStream.OpenMode_Binary)
    writer = BinaryStreamWriter(stream)
    writer.setFrom(reader)
    writer.write()

    if not Status.isOk():
        status = Status.get()
        raise RuntimeError(f"Error saving DNA: {status.message}")


if __name__ == "__main__":
    makedirs(OUTPUT_DIR, exist_ok=True)

    dna_reader = load_dna(CHARACTER_DNA)
    calibrated = DNACalibDNAReader(dna_reader)
    # Prints current joint name
    print(calibrated.getJointName(10))
    # Creates rename command
    rename = RenameJointCommand(10, "NewJointA")
    # Executes command
    rename.run(calibrated)
    # Prints the new joint name
    print(calibrated.getJointName(10))
    save_dna(calibrated, OUTPUT_DNA)
    print('Done.')