Enum Horizon 

pub enum Horizon {
    SunriseSunset,
    CivilTwilight,
    NauticalTwilight,
    AstronomicalTwilight,
    Custom(f64),
}

Predefined elevation angles for sunrise/sunset calculations.

Corresponds to different twilight definitions for consistent sunrise, sunset, and twilight calculations.

Variants

SunriseSunset

Standard sunrise/sunset (sun’s upper limb touches horizon, accounting for refraction)

CivilTwilight

Civil twilight (sun is 6° below horizon)

NauticalTwilight

Nautical twilight (sun is 12° below horizon)

AstronomicalTwilight

Astronomical twilight (sun is 18° below horizon)

Custom(f64)

Custom elevation angle

Implementations

impl Horizon

pub const fn elevation_angle(&self) -> f64

Gets the elevation angle in degrees for this horizon definition.

Negative values indicate the sun is below the horizon.

pub fn custom(elevation_degrees: f64) -> Result<Self>

Creates a custom horizon with the specified elevation angle.

Errors

Returns InvalidElevationAngle if elevation is outside -90 to +90 degrees.

Trait Implementations

impl Clone for Horizon

fn clone(&self) -> Horizon

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Horizon

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for Horizon

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Horizon

fn eq(&self, other: &Horizon) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Horizon

impl Eq for Horizon

impl StructuralPartialEq for Horizon