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feat: multibrot exponent up to 20

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surv
2026-09-27 12:23:11 +02:00
parent 1bb3113581
commit 28ff2471b3
8 changed files with 96 additions and 46 deletions
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src/fractal/reference.rs
+7 -3
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@@ -564,13 +564,17 @@ mod tests {
fn f64_fast_path_matches_big() {
let bits_fast = F64_MAX_PRECISION;
let bits_big = F64_MAX_PRECISION + 64;
for kind in FractalKind::ALL {
let cases = FractalKind::ALL
.into_iter()
.map(|kind| (kind, 3))
.chain([(FractalKind::Multibrot, 20)]); // highest supported power
for (kind, power) in cases {
for julia in [false, true] {
for morph in [None, Some((FractalKind::Phoenix, 0.3))] {
let run = |bits: usize| {
let (a, b) = (big_from_f64(-0.3, bits), big_from_f64(0.2, bits));
let (jr, ji) = (big_from_f64(-0.4, bits), big_from_f64(0.55, bits));
let args = (60, bits, kind, 3, (0.1, -0.2), (0.9, 0.3), (2.3, 0.4));
let args = (60, bits, kind, power, (0.1, -0.2), (0.9, 0.3), (2.3, 0.4));
if julia {
compute_reference(
&a, &b, &jr, &ji, args.0, args.1, args.2, args.3, args.4, args.5,
@@ -583,7 +587,7 @@ mod tests {
)
}
};
let ctx = format!("{kind:?} julia={julia} morph={morph:?}");
let ctx = format!("{kind:?} power={power} julia={julia} morph={morph:?}");
let (fast, big) = (run(bits_fast), run(bits_big));
assert_eq!(fast.len(), big.len(), "{ctx}: length");
for (i, (f, b)) in fast.iter().zip(&big).enumerate() {