#[derive(Debug, Clone, Copy, PartialEq)]
pub struct PbrMaterial {
    pub albedo: [f32; 3],
    pub roughness: f32,
    pub metallic: f32,
}

impl PbrMaterial {
    pub fn dark_terrain() -> Self {
        Self {
            albedo: [0.20, 0.19, 0.18],
            roughness: 0.92,
            metallic: 0.0,
        }
    }
    pub fn icy_bright() -> Self {
        Self {
            albedo: [0.60, 0.63, 0.67],
            roughness: 0.40,
            metallic: 0.0,
        }
    }
    pub fn crater_floor() -> Self {
        Self {
            albedo: [0.30, 0.29, 0.28],
            roughness: 0.85,
            metallic: 0.01,
        }
    }
}
