#[derive(Debug, Clone, Copy, PartialEq)]
pub struct ElevationSample {
    pub latitude_deg: f64,
    pub longitude_deg: f64,
    pub elevation_m: f64,
}

pub fn sample_dem(latitude_deg: f64, longitude_deg: f64) -> ElevationSample {
    let voltaire_bias =
        if (20.0..=30.0).contains(&latitude_deg) && (150.0..=170.0).contains(&longitude_deg) {
            -300.0
        } else {
            0.0
        };
    let swift_bias =
        if (-15.0..=-5.0).contains(&latitude_deg) && (30.0..=50.0).contains(&longitude_deg) {
            -150.0
        } else {
            0.0
        };
    let wave = latitude_deg.to_radians().sin() * 50.0 + longitude_deg.to_radians().cos() * 30.0;
    ElevationSample {
        latitude_deg,
        longitude_deg,
        elevation_m: voltaire_bias + swift_bias + wave,
    }
}
