goad-py 0.8.5

Physical optics light scattering computation

GOAD-PY

Python bindings for GOAD (Geometric Optics Approximation with Diffraction) - a physical optics light scattering computation library.

Installation

pip install goad-py

Quick Start

import goad_py

# Create a problem with minimal setup
settings = goad_py.Settings("path/to/geometry.obj")
mp = goad_py.MultiProblem(settings)
mp.py_solve()

# Access scattering data
results = mp.results
print(f"Scattering cross-section: {results.scat_cross}")
print(f"Extinction cross-section: {results.ext_cross}")
print(f"Asymmetry parameter: {results.asymmetry}")

Convergence Analysis

For statistical error estimation, use the convergence analysis functionality:

from goad_py import Convergence, Convergable

# Set up convergence analysis
convergence = Convergence(
    settings=goad_py.Settings(geom_path="path/to/geometry.obj"),
    convergables=[
        Convergable('asymmetry', 'absolute', 0.005),  # absolute SEM < 0.005
        Convergable('scatt', 'relative', 0.01),       # relative SEM < 1%
    ],
    batch_size=100
)

# Run until convergence
results = convergence.run()
print(f"Converged: {results.converged}")
print(f"Final values: {results.values}")

Features

• Fast light scattering computations using physical optics
• Support for various 3D geometry formats
• Configurable wavelength, refractive index, and orientations
• Multi-orientation averaging capabilities
• Convergence analysis for statistical error estimation
• Efficient parallel computation with GIL release

Documentation

• Rust API Documentation
• GitHub Repository

License

GPL-3.0 License - see the LICENSE file in the main repository for details.