Function dist2_3

perro_source/render_stack/perro_meshlets/src/lib.rs:714–716

(a: [f32; 3], b: [f32; 3])

        return f64::INFINITY;
    };
    let Some(remove_v) = vertices.get(remove as usize) else {
        return f64::INFINITY;
    };
    let mut q = quadrics.get(keep as usize).copied().unwrap_or([0.0; 10]);
    let rq = quadrics.get(remove as usize).copied().unwrap_or([0.0; 10]);
    for (dst, src) in q.iter_mut().zip(rq.iter()) {