src/solar_system/orbit.rs


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use crate::solar_system::{Angle, BodyId, Kilometers, OrbitalBody, Percentage};
use crate::timeman::{Second};

pub struct StaticOrbit
{
    pub parent: Option<BodyId>,
    pub eccentricity: Percentage,
    pub inclination: Angle,
    pub long_asc_node: Angle,
    pub long_periapsis: Angle,
    pub mean_long: Angle,

    pub semi_major_axis: Kilometers,
}

impl StaticOrbit
{
    pub fn period(
        &self,
        this_body: &OrbitalBody)
        -> Second
    {
        ((self.semi_major_axis.powf(3.0) / this_body.sgp).sqrt() * std::f64::consts::TAU) as u64 
    }

    pub fn parent(&self) -> Option<BodyId> {
        self.parent
    }
}