earths 0.0.4

High-fidelity Earth simulation engine — orbit, atmosphere, geology, hydrology, biosphere, terrain, lighting, rendering, satellites, and temporal systems with full scientific coupling
Documentation 
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pub struct BathymetryData {
    pub resolutionarcsec: f64,
    pub data: Vec<f64>,
    pub rows: usize,
    pub cols: usize,
}
impl BathymetryData {
    pub fn global(resolutionarcsec: f64) -> Self {
        let effectiveres = resolutionarcsec.max(600.0);
        let rows = (180.0 * 3600.0 / effectiveres) as usize;
        let cols = (360.0 * 3600.0 / effectiveres) as usize;
        let mut data = vec![0.0; rows * cols];
        for r in 0..rows {
            for c in 0..cols {
                let lat = 90.0 - (r as f64 + 0.5) * effectiveres / 3600.0;
                let lon = -180.0 + (c as f64 + 0.5) * effectiveres / 3600.0;
                let elev = crate::terrain::heightmap::earthelevation(lat, lon);
                data[r * cols + c] = if elev < 0.0 { elev } else { 0.0 };
            }
        }
        Self {
            resolutionarcsec: effectiveres,
            data,
            rows,
            cols,
        }
    }
    pub fn sample(&self, latdeg: f64, londeg: f64) -> f64 {
        let latfrac = (latdeg + 90.0) / 180.0;
        let lonfrac = (londeg + 180.0) / 360.0;
        let row =
            ((1.0 - latfrac) * (self.rows - 1) as f64).clamp(0.0, (self.rows - 1) as f64) as usize;
        let col = (lonfrac * (self.cols - 1) as f64).clamp(0.0, (self.cols - 1) as f64) as usize;
        self.data.get(row * self.cols + col).copied().unwrap_or(0.0)
    }
    pub fn isocean(&self, latdeg: f64, londeg: f64) -> bool {
        self.sample(latdeg, londeg) < 0.0
    }
    pub fn oceanstats() -> OceanBasinStats {
        OceanBasinStats {
            avgdepthm: 3688.0,
            maxdepthm: 10994.0,
            totalvolumekm3: 1335000000.0,
            surfaceareakm2: 361132000.0,
        }
    }
}
pub struct OceanBasinStats {
    pub avgdepthm: f64,
    pub maxdepthm: f64,
    pub totalvolumekm3: f64,
    pub surfaceareakm2: f64,
}
pub struct OceanBasin {
    pub name: String,
    pub avgdepthm: f64,
    pub maxdepthm: f64,
    pub areakm2: f64,
}
impl OceanBasin {
    pub fn majorbasins() -> Vec<Self> {
        vec![
            Self {
                name: "Pacific".into(),
                avgdepthm: 4280.0,
                maxdepthm: 10994.0,
                areakm2: 165250000.0,
            },
            Self {
                name: "Atlantic".into(),
                avgdepthm: 3646.0,
                maxdepthm: 8376.0,
                areakm2: 106460000.0,
            },
            Self {
                name: "Indian".into(),
                avgdepthm: 3741.0,
                maxdepthm: 7906.0,
                areakm2: 70560000.0,
            },
            Self {
                name: "Southern".into(),
                avgdepthm: 3270.0,
                maxdepthm: 7236.0,
                areakm2: 21960000.0,
            },
            Self {
                name: "Arctic".into(),
                avgdepthm: 1205.0,
                maxdepthm: 5550.0,
                areakm2: 14060000.0,
            },
        ]
    }
}