Crate optica 

optica — participating-media and optics foundations

optica provides fast, typed building blocks for optics and radiative-transfer workloads: rays, optical coefficients, scattering phase functions, sampled spectra, interpolation tables, and optical-depth integration kernels.

The crate is intentionally domain-agnostic. It does not include astronomy, planetary constants, ephemerides, or site-specific policies.

Feature flags

• std (default): enables std-dependent helpers (ASCII loader, etc.).
• alloc: enables heap-backed containers in no_std builds. All public types that use Vec/Box/String are gated behind alloc or std.
• serde: derives Serialize/Deserialize for the public data, error, and policy enums.

References

• Chandrasekhar, Radiative Transfer.
• Bodhaine et al. (1999), Rayleigh optical-depth approximation.

Re-exports

pub use grid::AxisDirection;

pub use grid::ConstantRegion;

Modules

data

Provenance metadata for tabulated optics inputs and generated products.

grid

Typed interpolation grids for optics workloads.

medium

Participating-medium abstractions and optical coefficients.

phase

Scattering phase functions for participating-media models.

prelude

Convenient re-exports for common optica workflows.

ray

Typed rays and ray segments.

scatter

Generic single-scattering depth parameterizations.

spectrum

Sampled-spectrum container, interpolation, integration, and loaders.

transport

Optical-depth integration and transport helpers.