Function tri_degenerate

perro_source/render_stack/perro_meshlets/src/lib.rs:685–687

(tri: [u32; 3])

        .extend(scratch.edges.iter().map(|(&(a, b), info)| EdgeCandidate {
            a,
            b,
            count: info.count,
        }));
}

fn better_collapse(current: Option<Collapse>, candidate: Option<Collapse>) -> Option<Collapse> {