A direction on the celestial sphere, compile-time tagged by frame. More...

#include <siderust/coordinates/spherical.hpp>

Public Member Functions
	Direction ()
	Direction (qtty::Degree azimuth, qtty::Degree polar)
qtty::Degree	angular_separation (const Direction &other) const
	Angular separation between this direction and another.
template<typename Target>
std::enable_if_t< frames::has_frame_transform_v< F, Target >, Direction< Target > >	to_frame (const Time< TT, JD > &jd) const
	Transform to a different reference frame.
template<typename Target>
std::enable_if_t< frames::has_frame_transform_v< F, Target >, Direction< Target > >	to_frame_with (const Time< TT, JD > &jd, const AstroContext &ctx) const
	Transform to a different reference frame with an explicit context.
template<typename Target>
auto	to (const Time< TT, JD > &jd) const -> decltype(this->template to_frame< Target >(jd))
	Shorthand: .to<Target>(jd) (calls to_frame).
cartesian::Direction< F >	to_cartesian () const
	Convert this spherical direction to a Cartesian unit vector.
template<typename F_ = F>
std::enable_if_t< frames::has_horizontal_transform_v< F_ >, Direction< frames::Horizontal > >	to_horizontal (const Time< TT, JD > &jd, const Geodetic &observer) const
	Transform to the horizontal (alt-az) frame.
template<typename F_ = F>
std::enable_if_t< frames::has_horizontal_transform_v< F_ >, Direction< frames::Horizontal > >	to_horizontal_with (const Time< TT, JD > &jd, const Geodetic &observer, const AstroContext &ctx) const
	Transform to the horizontal frame with an explicit context.
template<typename F_ = F>
std::enable_if_t< frames::has_horizontal_transform_v< F_ >, Direction< frames::Horizontal > >	to_horizontal_precise (const Time< TT, JD > &jd_tt, const Time< UT1, JD > &jd_ut1, const Geodetic &observer) const
	High-precision horizontal transform with explicit TT and UT1 epochs.
RA / Dec (equatorial frames only)
template<typename F_ = F, std::enable_if_t< frames::has_ra_dec_v< F_ >, int > = 0>
qtty::Degree	ra () const
template<typename F_ = F, std::enable_if_t< frames::has_ra_dec_v< F_ >, int > = 0>
qtty::Degree	dec () const
Azimuth / Altitude (Horizontal frame only)
template<typename F_ = F, std::enable_if_t< frames::has_az_alt_v< F_ >, int > = 0>
qtty::Degree	az () const
template<typename F_ = F, std::enable_if_t< frames::has_az_alt_v< F_ >, int > = 0>
qtty::Degree	al () const
template<typename F_ = F, std::enable_if_t< frames::has_az_alt_v< F_ >, int > = 0>
qtty::Degree	alt () const
template<typename F_ = F, std::enable_if_t< frames::has_az_alt_v< F_ >, int > = 0>
qtty::Degree	altitude () const
Longitude / Latitude (lon/lat frames)
template<typename F_ = F, std::enable_if_t< frames::has_lon_lat_v< F_ >, int > = 0>
qtty::Degree	lon () const
template<typename F_ = F, std::enable_if_t< frames::has_lon_lat_v< F_ >, int > = 0>
qtty::Degree	lat () const
template<typename F_ = F, std::enable_if_t< frames::has_lon_lat_v< F_ >, int > = 0>
qtty::Degree	longitude () const
template<typename F_ = F, std::enable_if_t< frames::has_lon_lat_v< F_ >, int > = 0>
qtty::Degree	latitude () const

Static Public Member Functions
Frame info
static constexpr siderust_frame_t	frame_id ()
static constexpr const char *	frame_name ()

FFI interop
siderust_spherical_dir_t	to_c () const
static Direction	from_c (const siderust_spherical_dir_t &c)

Detailed Description

template<typename F>
struct siderust::spherical::Direction< F >

A direction on the celestial sphere, compile-time tagged by frame.

Mirrors Rust's affn::spherical::Direction<F>.

Template Parameters

F	Reference frame chapter content removed. Restore the original from \texttt{archived_worktree/tex/chapters/12-logging-audit.tex} if needed. tag (e.g. frames::ICRS).

Accessors

Access values through frame-appropriate getters:

Equatorial frames: ra(), dec()
Horizontal frame: az(), al() / alt()
Lon/lat frames: lon(), lat()

Definition at line 50 of file spherical.hpp.

Constructor & Destructor Documentation

◆ Direction() [1/2]

template<typename F>

siderust::spherical::Direction< F >::Direction ( )

inline

Definition at line 58 of file spherical.hpp.

Referenced by siderust::spherical::Direction< frames::EclipticMeanJ2000 >::from_c(), siderust::spherical::Direction< frames::EclipticMeanJ2000 >::to_frame(), and siderust::spherical::Direction< frames::EclipticMeanJ2000 >::to_frame_with().

◆ Direction() [2/2]

template<typename F>

siderust::spherical::Direction< F >::Direction	(	qtty::Degree	azimuth,
		qtty::Degree	polar )

inline

Definition at line 60 of file spherical.hpp.

Member Function Documentation

◆ al()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_az_alt_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::al ( ) const

inline

Definition at line 89 of file spherical.hpp.

◆ alt()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_az_alt_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::alt ( ) const

inline

Definition at line 94 of file spherical.hpp.

Referenced by siderust::spherical::operator<<().

◆ altitude()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_az_alt_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::altitude ( ) const

inline

Definition at line 99 of file spherical.hpp.

◆ angular_separation()

template<typename F>

qtty::Degree siderust::spherical::Direction< F >::angular_separation ( const Direction< F > & other ) const

inline

Angular separation between this direction and another.

Uses the Vincenty formula for numerical stability, even near 0° and 180°.

Parameters

other Direction in the same frame.

Returns: Angular separation in degrees.

Definition at line 144 of file spherical.hpp.

◆ az()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_az_alt_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::az ( ) const

inline

Definition at line 84 of file spherical.hpp.

Referenced by siderust::spherical::operator<<().

◆ dec()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_ra_dec_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::dec ( ) const

inline

Definition at line 76 of file spherical.hpp.

Referenced by siderust::Star::create(), and siderust::spherical::operator<<().

◆ frame_id()

template<typename F>

constexpr siderust_frame_t siderust::spherical::Direction< F >::frame_id ( )

inlinestaticconstexpr

Definition at line 64 of file spherical.hpp.

Referenced by siderust::spherical::Direction< frames::EclipticMeanJ2000 >::to_c().

◆ frame_name()

template<typename F>

constexpr const char * siderust::spherical::Direction< F >::frame_name ( )

inlinestaticconstexpr

Definition at line 65 of file spherical.hpp.

◆ from_c()

template<typename F>

Direction siderust::spherical::Direction< F >::from_c ( const siderust_spherical_dir_t & c )

inlinestatic

Definition at line 131 of file spherical.hpp.

Referenced by siderust::spherical::Direction< frames::EclipticMeanJ2000 >::to_frame(), siderust::spherical::Direction< frames::EclipticMeanJ2000 >::to_frame_with(), siderust::spherical::Direction< frames::EclipticMeanJ2000 >::to_horizontal(), siderust::spherical::Direction< frames::EclipticMeanJ2000 >::to_horizontal_precise(), and siderust::spherical::Direction< frames::EclipticMeanJ2000 >::to_horizontal_with().

◆ lat()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_lon_lat_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::lat ( ) const

inline

Definition at line 112 of file spherical.hpp.

Referenced by siderust::spherical::operator<<().

◆ latitude()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_lon_lat_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::latitude ( ) const

inline

Definition at line 122 of file spherical.hpp.

◆ lon()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_lon_lat_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::lon ( ) const

inline

Definition at line 107 of file spherical.hpp.

Referenced by siderust::spherical::operator<<().

◆ longitude()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_lon_lat_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::longitude ( ) const

inline

Definition at line 117 of file spherical.hpp.

◆ ra()

template<typename F>

template<typename F_ = F, std::enable_if_t< frames::has_ra_dec_v< F_ >, int > = 0>

qtty::Degree siderust::spherical::Direction< F >::ra ( ) const

inline

Definition at line 71 of file spherical.hpp.

Referenced by siderust::Star::create(), and siderust::spherical::operator<<().

◆ to()

template<typename F>

template<typename Target>

auto siderust::spherical::Direction< F >::to ( const Time< TT, JD > & jd ) const->decltype(this->templateto_frame< Target >(jd))

inline

Shorthand: .to<Target>(jd) (calls to_frame).

Definition at line 205 of file spherical.hpp.

◆ to_c()

template<typename F>

siderust_spherical_dir_t siderust::spherical::Direction< F >::to_c ( ) const

inline

Definition at line 129 of file spherical.hpp.

Referenced by siderust::icrs_altitude::altitude_at(), siderust::icrs_altitude::azimuth_at(), and siderust::Subject::icrs().

◆ to_cartesian()

template<typename F>

cartesian::Direction< F > siderust::spherical::Direction< F >::to_cartesian ( ) const

inline

Convert this spherical direction to a Cartesian unit vector.

Mirrors Rust's affn::spherical::Direction::to_cartesian(). The result is a frame-tagged unit vector in cartesian::Direction<F>.

Definition at line 215 of file spherical.hpp.

◆ to_frame()

template<typename F>

template<typename Target>

std::enable_if_t< frames::has_frame_transform_v< F, Target >, Direction< Target > > siderust::spherical::Direction< F >::to_frame ( const Time< TT, JD > & jd ) const

inline

Transform to a different reference frame.

Only enabled for frame pairs with a FrameRotationProvider in the FFI. Attempting an unsupported transform is a compile-time error.

Template Parameters

Target Destination frame tag.

Definition at line 169 of file spherical.hpp.

Referenced by siderust::spherical::Direction< frames::EclipticMeanJ2000 >::to().

◆ to_frame_with()

template<typename F>

template<typename Target>

std::enable_if_t< frames::has_frame_transform_v< F, Target >, Direction< Target > > siderust::spherical::Direction< F >::to_frame_with	(	const Time< TT, JD > &	jd,
		const AstroContext &	ctx ) const

inline

Transform to a different reference frame with an explicit context.

Definition at line 187 of file spherical.hpp.

◆ to_horizontal()

template<typename F>

template<typename F_ = F>

std::enable_if_t< frames::has_horizontal_transform_v< F_ >, Direction< frames::Horizontal > > siderust::spherical::Direction< F >::to_horizontal	(	const Time< TT, JD > &	jd,
		const Geodetic &	observer ) const

inline

Transform to the horizontal (alt-az) frame.

Definition at line 228 of file spherical.hpp.

◆ to_horizontal_precise()

template<typename F>

template<typename F_ = F>

std::enable_if_t< frames::has_horizontal_transform_v< F_ >, Direction< frames::Horizontal > > siderust::spherical::Direction< F >::to_horizontal_precise	(	const Time< TT, JD > &	jd_tt,
		const Time< UT1, JD > &	jd_ut1,
		const Geodetic &	observer ) const

inline

High-precision horizontal transform with explicit TT and UT1 epochs.

Use this overload when you have separately-computed TT and UT1 Julian Dates available (e.g. from a precise time-scale conversion) and want maximum accuracy without constructing an explicit AstroContext.

Parameters

jd_tt	Terrestrial Time (TT) Julian Date.
jd_ut1	Universal Time (UT1) Julian Date.
observer	Observer geodetic position.

Definition at line 266 of file spherical.hpp.

◆ to_horizontal_with()

template<typename F>

template<typename F_ = F>

std::enable_if_t< frames::has_horizontal_transform_v< F_ >, Direction< frames::Horizontal > > siderust::spherical::Direction< F >::to_horizontal_with	(	const Time< TT, JD > &	jd,
		const Geodetic &	observer,
		const AstroContext &	ctx ) const

inline

Transform to the horizontal frame with an explicit context.

Definition at line 242 of file spherical.hpp.

The documentation for this struct was generated from the following file:

spherical.hpp

Public Member Functions

Static Public Member Functions

FFI interop

Detailed Description

Constructor & Destructor Documentation

◆ Direction() [1/2]

◆ Direction() [2/2]

Member Function Documentation

◆ al()

◆ alt()

◆ altitude()

◆ angular_separation()

◆ az()

◆ dec()

◆ frame_id()

◆ frame_name()

◆ from_c()

◆ lat()

◆ latitude()

◆ lon()

◆ longitude()

◆ ra()

◆ to()

◆ to_c()

◆ to_cartesian()

◆ to_frame()

◆ to_frame_with()

◆ to_horizontal()

◆ to_horizontal_precise()

◆ to_horizontal_with()