Function pseudo_jitter

crates/plotlars-plotters/src/render/boxplot.rs:547–550

Deterministic pseudo-random jitter from value index. Determinism matters so SVG output is byte-stable across runs (relied on by integration tests). `2654435761` is Knuth's multiplicative-hash constant (golden-ratio integer).

(index: usize, jitter_amount: f64)

/// SVG output is byte-stable across runs (relied on by integration tests).
/// `2654435761` is Knuth's multiplicative-hash constant (golden-ratio integer).
fn pseudo_jitter(index: usize, jitter_amount: f64) -> f64 {
    let hash = (index as u32).wrapping_mul(2654435761) as f64 / u32::MAX as f64;
    (hash - 0.5) * 2.0 * jitter_amount
}