venuss 0.0.2

Venus celestial simulation crate for the MilkyWay SolarSystem workspace
Documentation 
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum DaylightState {
    Day,
    Twilight,
    Night,
}

pub struct DayNightCycle {
    pub ls_deg: f64,
}
impl DayNightCycle {
    pub fn new(ls_deg: f64) -> Self {
        Self { ls_deg }
    }
    pub fn state_at(&self, lat_deg: f64, local_time_h: f64) -> DaylightState {
        let s =
            super::solar_position::SolarPosition::compute(self.ls_deg, local_time_h, lat_deg, 0.0);
        if s.elevation_deg > 0.0 {
            DaylightState::Day
        } else if s.elevation_deg > -12.0 {
            DaylightState::Twilight
        } else {
            DaylightState::Night
        }
    }
}