earths 0.0.1

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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use sciforge::hub::domain::geology::petrology::{
    differentiation_index, liquidus_temperature, mg_number, solidus_depression,
    total_alkali_silica, viscosity_arrhenius,
};
pub struct Magma {
    pub sio2_wt_percent: f64,
    pub na2o_wt_percent: f64,
    pub k2o_wt_percent: f64,
    pub mgo_wt_percent: f64,
    pub feo_wt_percent: f64,
    pub h2o_wt_percent: f64,
    pub temperature_c: f64,
}
impl Magma {
    pub fn basaltic() -> Self {
        Self {
            sio2_wt_percent: 49.0,
            na2o_wt_percent: 2.5,
            k2o_wt_percent: 0.5,
            mgo_wt_percent: 8.0,
            feo_wt_percent: 10.0,
            h2o_wt_percent: 1.0,
            temperature_c: 1200.0,
        }
    }
    pub fn andesitic() -> Self {
        Self {
            sio2_wt_percent: 58.0,
            na2o_wt_percent: 3.5,
            k2o_wt_percent: 1.5,
            mgo_wt_percent: 4.0,
            feo_wt_percent: 7.0,
            h2o_wt_percent: 3.0,
            temperature_c: 1000.0,
        }
    }
    pub fn rhyolitic() -> Self {
        Self {
            sio2_wt_percent: 72.0,
            na2o_wt_percent: 4.0,
            k2o_wt_percent: 4.0,
            mgo_wt_percent: 0.5,
            feo_wt_percent: 2.0,
            h2o_wt_percent: 5.0,
            temperature_c: 800.0,
        }
    }
    pub fn mg_number(&self) -> f64 {
        mg_number(self.mgo_wt_percent, self.feo_wt_percent)
    }
    pub fn total_alkali(&self) -> f64 {
        total_alkali_silica(
            self.na2o_wt_percent + self.k2o_wt_percent,
            self.sio2_wt_percent,
        )
    }
    pub fn liquidus_temp_c(&self) -> f64 {
        liquidus_temperature(self.sio2_wt_percent, self.h2o_wt_percent, 1000.0)
    }
    pub fn viscosity_pa_s(&self) -> f64 {
        let temp_k = self.temperature_c + crate::CELSIUS_TO_KELVIN;
        let a = crate::VISCOSITY_SHAW_A;
        let ea = crate::EA_VISCOSITY_MAGMA;
        viscosity_arrhenius(a, ea, temp_k)
    }
    pub fn solidus_depression_c(&self) -> f64 {
        solidus_depression(self.h2o_wt_percent, 1000.0, 1.0)
    }
    pub fn differentiation_idx(&self) -> f64 {
        differentiation_index(
            self.sio2_wt_percent,
            self.na2o_wt_percent,
            self.k2o_wt_percent,
            0.0,
        )
    }
}
pub fn volcanic_explosivity_index(ejecta_volume_km3: f64) -> u8 {
    if ejecta_volume_km3 < 1e-6 {
        0
    } else if ejecta_volume_km3 < 1e-4 {
        1
    } else if ejecta_volume_km3 < 1e-3 {
        2
    } else if ejecta_volume_km3 < 1e-2 {
        3
    } else if ejecta_volume_km3 < 0.1 {
        4
    } else if ejecta_volume_km3 < 1.0 {
        5
    } else if ejecta_volume_km3 < 10.0 {
        6
    } else if ejecta_volume_km3 < 100.0 {
        7
    } else {
        8
    }
}