Function rand_vec

nodedb-codec/src/vector_quant/bbq.rs:312–326

(seed: u64, dim: usize)

    use super::*;

    fn rand_vec(seed: u64, dim: usize) -> Vec<f32> {
        // Simple deterministic LCG.
        let mut x = seed
            .wrapping_mul(6364136223846793005)
            .wrapping_add(1442695040888963407);
        (0..dim)
            .map(|_| {
                x = x
                    .wrapping_mul(6364136223846793005)
                    .wrapping_add(1442695040888963407);
                // Map to [-2, 2].
                ((x >> 33) as f32) / (u32::MAX as f32) * 4.0 - 2.0
            })
            .collect()
    }

    #[test]
    fn to_bytes_from_bytes_roundtrip() {