Function veloren_voxygen::mesh::terrain::calc_light

fn calc_light<V: RectRasterableVol<Vox = Block> + ReadVol + Debug>(
    is_sunlight: bool,
    default_light: u8,
    bounds: Aabb<i32>,
    vol: &VolGrid2d<V>,
    lit_blocks: impl Iterator<Item = (Vec3<i32>, u8)>
) -> impl Fn(Vec3<i32>) -> f32 + 'static + Send + Sync