This project is a simple USD (Universal Scene Description) viewer built with PySide6 and integrated with Hydra for rendering. It includes a timeline widget for animation playback, inspired by BigRoy’s example on Gist.
• Load and display USD files
• Control animation playback with a timeline widget
• Adjust frames per second (FPS) for playback
• Python 3.11 (or adjust as needed)
• PySide6
• PyOpenGL
• OpenUSD (built from source)
git clone https://github.com/your-username/hydra-usd-pyside-viewer.git
cd hydra-usd-pyside-viewerThis project uses pyenv for managing the Python version. You can set up pyenv as follows, but it’s optional.
pyenv install 3.11.5
pyenv virtualenv 3.11.5 hydra-usd-pyside
pyenv activate hydra-usd-pysidepip install -r requirements.txtFollow the instructions on the OpenUSD GitHub repository to build USD from source. Use the --build-monolithic option to ensure all necessary components are included.
git clone https://github.com/PixarAnimationStudios/OpenUSD.git
cd OpenUSD
python build_scripts/build_usd.py /opt/local/USD --python --build-monolithicModify the USD_INSTALL_PATH variable in env_setup.py to point to your USD build location.
# Define the USD installation path
USD_INSTALL_PATH = '/opt/local/USD'python src/main.py• Play Animation: Use the play button on the timeline widget to start/stop the animation.
• Adjust FPS: Use the FPS control to change the playback speed.
• Navigate Frames: Use the slider or frame input boxes to jump to specific frames.
• env_setup.py: Sets up the necessary environment variables for USD.
• src/main.py: Main application script.
• timeline.py: Contains the timeline widget and playback control logic.
• requirements.txt: List of Python dependencies.
• Ensure the USD build location is correctly set in env_setup.py.
• The project uses pyenv for environment management, but it’s optional. You can use any Python environment setup that