siderust 0.6.0

High-precision astronomy and satellite mechanics in Rust.
Documentation 
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// SPDX-License-Identifier: AGPL-3.0-or-later
// Copyright (C) 2026 Vallés Puig, Ramon

//! Frame-rotation providers for **IAU body-fixed planetary frames**.
//!
//! Each planet (plus the Moon) has a body-fixed frame defined by the IAU
//! right-ascension (α₀), declination (δ₀) and prime-meridian angle (W)
//! polynomials. The rotation from body-fixed to ICRS is computed via
//! [`iau_body_fixed_to_icrs`](super::iau_body_fixed_to_icrs), which
//! builds the ZXZ Euler rotation from these three angles.
//!
//! The [`impl_body_fixed_rotation`] macro generates both the direct
//! `BodyFixed → ICRS` impl and its inverse. Cross-frame pairs (e.g.
//! `EclipticMeanJ2000 ↔ MarsFixed`) are generated by
//! [`impl_via_icrs_bidirectional`].

use super::*;

macro_rules! impl_body_fixed_rotation {
    ($frame:ty, $body_ty:ty) => {
        impl FrameRotationProvider<$frame, ICRS> for () {
            #[inline]
            fn rotation<Eph, Eop: EopProvider, Nut>(
                jd: JulianDate,
                _ctx: &AstroContext<Eph, Eop, Nut>,
            ) -> Rotation3 {
                iau_body_fixed_to_icrs(&<$body_ty as HasIauRotation>::ROTATION, jd)
            }
        }

        impl FrameRotationProvider<ICRS, $frame> for () {
            #[inline]
            fn rotation<Eph, Eop: EopProvider, Nut>(
                jd: JulianDate,
                ctx: &AstroContext<Eph, Eop, Nut>,
            ) -> Rotation3 {
                inverse_rotation::<ICRS, $frame, Eph, Eop, Nut>(jd, ctx)
            }
        }
    };
}

impl_body_fixed_rotation!(MercuryFixed, crate::bodies::solar_system::Mercury);
impl_body_fixed_rotation!(VenusFixed, crate::bodies::solar_system::Venus);
impl_body_fixed_rotation!(MarsFixed, crate::bodies::solar_system::Mars);
impl_body_fixed_rotation!(MoonPrincipalAxes, crate::bodies::solar_system::Moon);
impl_body_fixed_rotation!(JupiterSystemIII, crate::bodies::solar_system::Jupiter);
impl_body_fixed_rotation!(SaturnFixed, crate::bodies::solar_system::Saturn);
impl_body_fixed_rotation!(UranusFixed, crate::bodies::solar_system::Uranus);
impl_body_fixed_rotation!(NeptuneFixed, crate::bodies::solar_system::Neptune);
impl_body_fixed_rotation!(PlutoFixed, crate::bodies::solar_system::Pluto);

impl_via_icrs_bidirectional!(EclipticMeanJ2000, MercuryFixed);
impl_via_icrs_bidirectional!(EclipticMeanJ2000, VenusFixed);
impl_via_icrs_bidirectional!(EclipticMeanJ2000, MarsFixed);
impl_via_icrs_bidirectional!(EclipticMeanJ2000, MoonPrincipalAxes);
impl_via_icrs_bidirectional!(EclipticMeanJ2000, JupiterSystemIII);
impl_via_icrs_bidirectional!(EclipticMeanJ2000, SaturnFixed);
impl_via_icrs_bidirectional!(EclipticMeanJ2000, UranusFixed);
impl_via_icrs_bidirectional!(EclipticMeanJ2000, NeptuneFixed);
impl_via_icrs_bidirectional!(EclipticMeanJ2000, PlutoFixed);

impl_via_icrs_bidirectional!(EME2000, MercuryFixed);
impl_via_icrs_bidirectional!(EME2000, VenusFixed);
impl_via_icrs_bidirectional!(EME2000, MarsFixed);
impl_via_icrs_bidirectional!(EME2000, MoonPrincipalAxes);
impl_via_icrs_bidirectional!(EME2000, JupiterSystemIII);
impl_via_icrs_bidirectional!(EME2000, SaturnFixed);
impl_via_icrs_bidirectional!(EME2000, UranusFixed);
impl_via_icrs_bidirectional!(EME2000, NeptuneFixed);
impl_via_icrs_bidirectional!(EME2000, PlutoFixed);