//! Draw two union-ed tori
use crater::{
    csg::{
        algebra::CSGAlgebra,
        marching_cubes::{marching_cubes, MarchingCubesParams},
        surfaces::{IntoSurface, Surface3D},
        transformations::RotateAbout,
    },
    utils::Parallel,
};

fn main() {
    let z_torus = -(Surface3D::Torus { r1: 1.0, r2: 2.0 }).into_surface();
    let y_torus = -(Surface3D::Torus { r1: 1.0, r2: 2.0 })
        .into_surface()
        .transform(RotateAbout(0, 2, std::f64::consts::FRAC_PI_2));
    // Run marching cubes to render this shape
    let resolution = 50;
    let params = MarchingCubesParams {
        region: z_torus | y_torus,
        bounds: ([-3.0, -3.0, -3.0], [3.0, 3.0, 3.0]),
        resolution: (resolution, resolution, resolution),
        algebra: CSGAlgebra::default(),
    };
    let mesh = marching_cubes::<Parallel>(params);
    let mut path_buf = std::path::PathBuf::from("./target/stl/");
    path_buf.push("tori");
    path_buf.set_extension("stl");
    std::fs::create_dir_all(&path_buf.parent().expect("Failed to get parent directory"))
        .expect("Failed to create directory");
    mesh.write_stl(path_buf.to_str().unwrap())
        .expect("Failed to write csg.stl");
}