lib.rs

use fj::core::{
    operations::{
        split::SplitFace, sweep::SweepFaceOfShell, update::UpdateSolid,
    },
    topology::Solid,
};

pub fn model(size: f64, split_pos: f64, core: &mut fj::core::Core) -> Solid {
    let cuboid = cuboid::model([size, size, size], core);

    cuboid.update_shell(
        cuboid.shells().only(),
        |shell, core| {
            let face = shell.faces().first();
            let cycle = face.region().exterior();

            let line = [
                (cycle.half_edges().nth(0).unwrap(), [split_pos]),
                (cycle.half_edges().nth(2).unwrap(), [split_pos]),
            ];

            let (shell, [face, _]) = shell.split_face(face, line, core);

            [shell
                .sweep_face_of_shell(face, [0., 0., size / 2.], core)
                .shell]
        },
        core,
    )
}