marss 0.0.2

Mars celestial simulation crate for the MilkyWay SolarSystem workspace
Documentation 
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#[derive(Debug, Clone)]
pub struct PbrMaterial {
    pub albedo: [f32; 4],
    pub roughness: f32,
    pub metallic: f32,
    pub normal_strength: f32,
    pub emissive: [f32; 3],
}

pub fn regolith() -> PbrMaterial {
    PbrMaterial {
        albedo: [0.45, 0.22, 0.12, 1.0],
        roughness: 0.9,
        metallic: 0.0,
        normal_strength: 1.0,
        emissive: [0.0; 3],
    }
}

pub fn bright_dust() -> PbrMaterial {
    PbrMaterial {
        albedo: [0.55, 0.35, 0.15, 1.0],
        roughness: 0.95,
        metallic: 0.0,
        normal_strength: 0.5,
        emissive: [0.0; 3],
    }
}

pub fn dark_dune() -> PbrMaterial {
    PbrMaterial {
        albedo: [0.08, 0.06, 0.05, 1.0],
        roughness: 0.7,
        metallic: 0.05,
        normal_strength: 1.2,
        emissive: [0.0; 3],
    }
}

pub fn basalt() -> PbrMaterial {
    PbrMaterial {
        albedo: [0.12, 0.10, 0.09, 1.0],
        roughness: 0.6,
        metallic: 0.08,
        normal_strength: 1.5,
        emissive: [0.0; 3],
    }
}

pub fn water_ice() -> PbrMaterial {
    PbrMaterial {
        albedo: [0.80, 0.85, 0.90, 1.0],
        roughness: 0.3,
        metallic: 0.0,
        normal_strength: 0.3,
        emissive: [0.0; 3],
    }
}

pub fn co2_ice() -> PbrMaterial {
    PbrMaterial {
        albedo: [0.70, 0.72, 0.75, 1.0],
        roughness: 0.2,
        metallic: 0.0,
        normal_strength: 0.2,
        emissive: [0.0; 3],
    }
}

pub fn sulfate_salt() -> PbrMaterial {
    PbrMaterial {
        albedo: [0.60, 0.58, 0.45, 1.0],
        roughness: 0.8,
        metallic: 0.0,
        normal_strength: 0.8,
        emissive: [0.0; 3],
    }
}

pub fn volcanic_summit() -> PbrMaterial {
    PbrMaterial {
        albedo: [0.06, 0.05, 0.04, 1.0],
        roughness: 0.5,
        metallic: 0.1,
        normal_strength: 2.0,
        emissive: [0.002, 0.0005, 0.0],
    }
}