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M13.29: particle effects golden hashes 

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Brandon Thomas 2026-10-04 01:04:43 -04:00
parent d39c0e818c
commit b9f09869eb
1 changed files with 661 additions and 0 deletions
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//! Golden hashes of the CPU particle effects (M13.29).
//!
//! The sibling of `sim_golden.rs` for the particle systems and the per-pixel "particle" effects
//! that the GPU compositor draws from a shared per-frame plan: CC Particle World, CC Particle
//! Systems II, Particle Playground (cannon, grid, text, layer exploder, layer map, property
//! mappers, repel), CC Ball Action, CC Pixel Polly, CC Scatterize and Curl Noise. Same set-up,
//! hashing and re-pinning (`SIM_GOLDEN_PRINT=1`, `SIM_GOLDEN_OUT=<dir>`) as `sim_golden.rs`: any
//! change to the CPU output of these effects, however small, fails the test.
use effectcraft_effects::{Buf, EffectCtx, EffectEnv, EffectHost, LayerPixels, Params, apply, default_value, find};
use effectcraft_keyframe::Value;
use effectcraft_raster::Image;
const W: u32 = 64;
const H: u32 = 48;
/// Layer ids served by [`Host`]: a texture and a luminance map.
const TEX: u64 = 7;
const MAP: u64 = 8;
/// The effect's own layer: a colour ramp with a clear hole and a half-transparent band
/// (`hdr` makes part of it overbright).
fn layer(hdr: bool) -> Image {
let mut img = Image::new(W, H);
for y in 0..H {
for x in 0..W {
let (u, v) = (x as f32 / W as f32, y as f32 / H as f32);
let (dx, dy) = (x as f32 - 40.0, y as f32 - 20.0);
let a = if dx * dx + dy * dy < 64.0 {
0.0
} else if (30..36).contains(&y) {
0.45
} else {
1.0
};
let gain = if hdr && x < 20 { 1.6 } else { 1.0 };
let c = [u * gain, v * gain, (0.3 + 0.4 * (u * 9.0).sin().abs()) * gain];
img.set(x, y, [c[0] * a, c[1] * a, c[2] * a, a]);
}
}
img
}
/// Another layer: a checker texture (`TEX`) or a radial luminance map (`MAP`).
fn other(id: u64) -> Image {
let mut img = Image::new(W, H);
for y in 0..H {
for x in 0..W {
let p = if id == TEX {
let k = ((x / 8 + y / 8) % 2) as f32;
[0.9 * k + 0.1, 0.3 + 0.5 * (1.0 - k), 0.6, 1.0]
} else {
let d = ((x as f32 - 32.0).powi(2) + (y as f32 - 24.0).powi(2)).sqrt() / 40.0;
let l = (1.0 - d).clamp(0.0, 1.0);
[l, l, l, 1.0]
};
img.set(x, y, p);
}
}
img
}
struct Host;
impl EffectHost for Host {
fn layer(&self, id: u64, _: bool) -> Option<LayerPixels> {
let img = other(id);
Some(LayerPixels { buf: Buf { img, offset: [0.0; 2], scale: 1.0 }, size: [W as f64, H as f64] })
}
fn layer_at(&self, id: u64, comp_time: f64, _: bool) -> Option<LayerPixels> {
// A frame that changes with time (Particle Playground's Layer Map times).
let mut img = other(id);
let k = ((comp_time * 30.0).round() as i64).rem_euclid(5) as f32 * 0.15;
for p in img.data.iter_mut() {
p[0] = (p[0] + k).min(1.0) * p[3];
}
Some(LayerPixels { buf: Buf { img, offset: [0.0; 2], scale: 1.0 }, size: [W as f64, H as f64] })
}
fn audio(&self, _: u64, _: f64, _: usize, _: u32) -> Option<Vec<f32>> {
None
}
}
fn n(v: f64) -> Value {
Value::Scalar(v)
}
fn e(v: u32) -> Value {
Value::Enum(v)
}
fn l(id: u64) -> Value {
Value::Layer(Some(id))
}
type Set = Vec<(&'static str, Value)>;
fn b(v: bool) -> Value {
Value::Bool(v)
}
fn v2(x: f64, y: f64) -> Value {
Value::Vec2([x, y])
}
fn s(v: &str) -> Value {
Value::Str(v.into())
}
/// A Particle Playground grid (cannon off) plus `more`.
fn grid(more: Set) -> Set {
let mut g: Set = vec![
("cannonEnabled", b(false)),
("gridEnabled", b(true)),
("grid/gridPosition", v2(32.0, 20.0)),
("grid/gridWidth", n(40.0)),
("grid/gridHeight", n(20.0)),
("grid/particlesAcross", n(5.0)),
("grid/particlesDown", n(3.0)),
("grid/gridParticleRadius", n(3.0)),
("gravity/gravityForce", n(20.0)),
];
g.extend(more);
g
}
/// (effect id, parameter sets) — the first set of each is the defaults.
fn cases() -> Vec<(&'static str, Vec<Set>)> {
vec![
(
"ec.sim.ccparticleworld",
vec![
vec![],
vec![("birthRate", n(2.0)), ("particle/particleType", e(1)), ("particle/transferMode", e(2)), ("physics/animation", e(1))],
vec![("particle/particleType", e(4)), ("physics/animation", e(2)), ("particle/transferMode", e(1)), ("producer/radiusZ", n(0.3))],
vec![("particle/particleType", e(8)), ("physics/animation", e(5)), ("particle/transferMode", e(3)), ("particle/birthSize", n(0.4))],
vec![("particle/particleType", e(5)), ("physics/animation", e(8)), ("particle/sizeVariation", n(50.0)), ("physics/resistance", n(1.0))],
vec![("particle/particleType", e(3)), ("physics/animation", e(6)), ("particle/maxOpacity", n(100.0))],
vec![("particle/particleType", e(6)), ("physics/animation", e(4)), ("particle/deathSize", n(0.6))],
vec![("particle/particleType", e(7)), ("physics/animation", e(3))],
vec![("particle/particleType", e(2)), ("physics/animation", e(9))],
],
),
(
"ec.sim.ccparticlesystems2",
vec![
vec![],
vec![("particle/particleType", e(1)), ("particle/transferMode", e(2)), ("physics/animation", e(2)), ("birthRate", n(4.0))],
vec![("particle/particleType", e(5)), ("physics/animation", e(6)), ("particle/transferMode", e(1))],
vec![("particle/particleType", e(7)), ("particle/transferMode", e(3)), ("physics/animation", e(9)), ("producer/radiusX", n(10.0))],
vec![("particle/particleType", e(3)), ("physics/animation", e(4)), ("particle/sizeVariation", n(40.0))],
vec![("particle/particleType", e(4)), ("physics/animation", e(5)), ("physics/direction", n(60.0))],
],
),
(
"ec.sim.particleplayground",
vec![
vec![],
vec![
("cannon/cannonPosition", v2(20.0, 40.0)),
("cannon/particlesPerSecond", n(120.0)),
("cannon/velocity", n(80.0)),
("gravity/gravityForce", n(40.0)),
],
grid(vec![]),
grid(vec![("options/gridText", s("Ab C")), ("grid/gridParticleRadius", n(12.0)), ("options/autoOrientRotation", b(true))]),
vec![
("cannonEnabled", b(false)),
("exploderEnabled", b(true)),
("layerExploder/explodeLayer", l(TEX)),
("layerExploder/radiusOfNewParticles", n(3.0)),
],
grid(vec![
("layerMapEnabled", b(true)),
("layerMap/layerMapLayer", l(TEX)),
("layerMap/timeOffsetType", e(2)),
("layerMap/timeOffset", n(0.5)),
]),
grid(vec![
("mapperEnabled", b(true)),
("persistentPropertyMapper/useLayerAsMap", l(MAP)),
("persistentPropertyMapper/mapRedTo", e(8)),
("persistentPropertyMapper/redMin", n(-50.0)),
("persistentPropertyMapper/redMax", n(50.0)),
]),
grid(vec![
("ephemeralPropertyMapper/useLayerAsMap", l(MAP)),
("ephemeralPropertyMapper/mapRedTo", e(1)),
("ephemeralPropertyMapper/mapGreenTo", e(5)),
("ephemeralPropertyMapper/greenOperator", e(1)),
("ephemeralPropertyMapper/greenMax", n(4.0)),
]),
grid(vec![("repel/repelForce", n(5.0)), ("repel/repelForceRadius", n(12.0)), ("options/cannonText", s("xy")), ("cannonEnabled", b(true))]),
],
),
(
"ec.sim.ccballaction",
vec![
vec![],
vec![("scatter", n(20.0)), ("rotationAxis", e(6)), ("rotation", n(40.0)), ("twistProperty", e(3)), ("twistAngle", n(90.0))],
vec![("gridSpacing", n(2.0)), ("ballSize", n(80.0)), ("instabilityState", n(45.0)), ("twistProperty", e(2)), ("twistAngle", n(30.0))],
],
),
(
"ec.sim.ccpixelpolly",
vec![
vec![],
vec![("object", e(1)), ("gridSpacing", n(6.0))],
vec![("object", e(2)), ("spinning", n(90.0))],
vec![("object", e(3)), ("enableDepthSort", b(false)), ("gravity", n(2.0)), ("startTime", n(0.3))],
],
),
(
"ec.sim.ccscatterize",
vec![vec![], vec![("scatter", n(10.0))], vec![("rightTwist", n(60.0)), ("leftTwist", n(-30.0)), ("transferMode", e(1)), ("scatter", n(4.0))]],
),
(
"ec.noise.curlnoise",
vec![
vec![],
vec![("view", e(1))],
vec![
("edgeBehavior", e(1)),
("steps", n(8.0)),
("displacementAmount", n(60.0)),
("scale", n(20.0)),
("rotation", n(30.0)),
("evolution", n(90.0)),
],
],
),
]
}
/// Layer times, in order (the third seeks backwards).
const TIMES: [f64; 4] = [0.5, 1.5, 0.8, 2.2];
fn fnv(img: &Image) -> u64 {
let mut h = 0xcbf2_9ce4_8422_2325u64;
for b in [img.width, img.height].iter().flat_map(|v| v.to_le_bytes()) {
h = (h ^ b as u64).wrapping_mul(0x100_0000_01b3);
}
for p in &img.data {
for c in p {
for b in c.to_bits().to_le_bytes() {
h = (h ^ b as u64).wrapping_mul(0x100_0000_01b3);
}
}
}
h
}
fn render(id: &str, set: &Set, time: f64, bpc8: bool, half: bool) -> Image {
let spec = find(id).unwrap_or_else(|| panic!("no effect {id}"));
let size = [W as f64, H as f64];
let mut params = Params { values: spec.params.iter().map(|p| (p.id.to_string(), default_value(p, size))).collect() };
for (k, v) in set {
assert!(params.values.contains_key(*k), "{id}: unknown param {k}");
params.values.insert(k.to_string(), v.clone());
}
let mut img = layer(!bpc8);
if bpc8 {
img.clamp01();
img.quantize(255.0);
}
let mut buf = Buf { img, offset: [0.0; 2], scale: 1.0 };
if half {
// A half-resolution preview buffer padded by 3 px.
let (w2, h2) = (W / 2, H / 2);
let mut small = Image::new(w2, h2);
for y in 0..h2 {
for x in 0..w2 {
small.set(x, y, buf.img.sample_bilinear(x as f64 * 2.0 + 1.0, y as f64 * 2.0 + 1.0));
}
}
buf = Buf { img: small, offset: [0.0; 2], scale: 0.5 };
buf.pad(3);
}
let host = Host;
let env = EffectEnv { host: Some(&host), frame_rate: 30.0, comp_time: time, ..Default::default() };
let ctx = EffectCtx { params: &params, time, layer_size: size, seed: 1, adjustment: false, env };
let mut out = apply(spec, &ctx, buf).img;
if bpc8 {
out.clamp01();
out.quantize(255.0);
}
out
}
/// Every case's name and hash, in a fixed order.
fn hashes() -> Vec<(String, u64)> {
let out_dir = std::env::var_os("SIM_GOLDEN_OUT").map(std::path::PathBuf::from);
if let Some(d) = &out_dir {
std::fs::create_dir_all(d).unwrap();
}
let mut v = Vec::new();
for (id, sets) in cases() {
for (si, set) in sets.iter().enumerate() {
for (bpc8, half) in [(true, false), (false, false), (true, true)] {
if half && si > 0 {
continue;
}
for t in TIMES {
let img = render(id, set, t, bpc8, half);
let name = format!("{id}/{si}/{}{}/t{t}", if bpc8 { "8bpc" } else { "32bpc" }, if half { "/half" } else { "" });
if let Some(d) = &out_dir {
let bytes: Vec<u8> = img.data.iter().flat_map(|p| p.iter().flat_map(|c| c.to_le_bytes())).collect();
let file = format!("{}_{}x{}.f32", name.replace('/', "_"), img.width, img.height);
std::fs::write(d.join(file), bytes).unwrap();
}
v.push((name, fnv(&img)));
}
}
}
}
v
}
#[test]
fn particle_effects_golden_hashes() {
let got = hashes();
if std::env::var_os("SIM_GOLDEN_PRINT").is_some() {
for (name, h) in &got {
println!(" (\"{name}\", 0x{h:016x}),");
}
}
// Deterministic: a second pass (warm simulation caches) renders the same frames.
assert_eq!(got, hashes(), "particle effects render deterministically");
if cfg!(all(target_os = "macos", target_arch = "aarch64")) {
let bad: Vec<String> = got
.iter()
.zip(GOLDEN)
.filter(|((n, h), (gn, gh))| n != gn || h != gh)
.map(|((n, h), (_, gh))| format!("{n}: 0x{h:016x} (pinned 0x{gh:016x})"))
.collect();
assert_eq!(got.len(), GOLDEN.len(), "case count");
assert!(bad.is_empty(), "CPU output changed:\n{}", bad.join("\n"));
}
}
/// Pinned hashes (aarch64 macOS).
const GOLDEN: &[(&str, u64)] = &[
("ec.sim.ccparticleworld/0/8bpc/t0.5", 0x263d8f88e7ae651b),
("ec.sim.ccparticleworld/0/8bpc/t1.5", 0xb7697683e3cc6d43),
("ec.sim.ccparticleworld/0/8bpc/t0.8", 0xb5065326c8bd674a),
("ec.sim.ccparticleworld/0/8bpc/t2.2", 0x7f8eb5f2e8d38506),
("ec.sim.ccparticleworld/0/32bpc/t0.5", 0x6141abad89cd53ca),
("ec.sim.ccparticleworld/0/32bpc/t1.5", 0x2b5682e32bb3e916),
("ec.sim.ccparticleworld/0/32bpc/t0.8", 0xe6aaed9716d15c42),
("ec.sim.ccparticleworld/0/32bpc/t2.2", 0xa6e9a6f2acad94c0),
("ec.sim.ccparticleworld/0/8bpc/half/t0.5", 0xbb0b6803512a6b99),
("ec.sim.ccparticleworld/0/8bpc/half/t1.5", 0x70c578ea73992099),
("ec.sim.ccparticleworld/0/8bpc/half/t0.8", 0x2d26cb3f73a26b4f),
("ec.sim.ccparticleworld/0/8bpc/half/t2.2", 0x2b474438a48ee0e4),
("ec.sim.ccparticleworld/1/8bpc/t0.5", 0x294502dc827b0326),
("ec.sim.ccparticleworld/1/8bpc/t1.5", 0xf7874709f4012aaa),
("ec.sim.ccparticleworld/1/8bpc/t0.8", 0x87664ce9a05e67f9),
("ec.sim.ccparticleworld/1/8bpc/t2.2", 0x46e1b5162a0284f4),
("ec.sim.ccparticleworld/1/32bpc/t0.5", 0x02d8499e93133cb9),
("ec.sim.ccparticleworld/1/32bpc/t1.5", 0x97218172dec765c6),
("ec.sim.ccparticleworld/1/32bpc/t0.8", 0xee7da06e0b16e3b7),
("ec.sim.ccparticleworld/1/32bpc/t2.2", 0x6b9da0aa7d2a6abb),
("ec.sim.ccparticleworld/2/8bpc/t0.5", 0x71468ce82bba3cb2),
("ec.sim.ccparticleworld/2/8bpc/t1.5", 0x48595f55e8741a7e),
("ec.sim.ccparticleworld/2/8bpc/t0.8", 0x5ebc35e9eb02c8d7),
("ec.sim.ccparticleworld/2/8bpc/t2.2", 0xf9a0f63c72bd35f0),
("ec.sim.ccparticleworld/2/32bpc/t0.5", 0x757f80d45a2159b1),
("ec.sim.ccparticleworld/2/32bpc/t1.5", 0x7924f1cb9c8bf8c7),
("ec.sim.ccparticleworld/2/32bpc/t0.8", 0x22f507420a062c87),
("ec.sim.ccparticleworld/2/32bpc/t2.2", 0x41171121719a307a),
("ec.sim.ccparticleworld/3/8bpc/t0.5", 0xbca7e3d574cf5e37),
("ec.sim.ccparticleworld/3/8bpc/t1.5", 0x5c4347a6c70b48ec),
("ec.sim.ccparticleworld/3/8bpc/t0.8", 0xc79131dbaa8ff129),
("ec.sim.ccparticleworld/3/8bpc/t2.2", 0xc08d0c5e8f87189d),
("ec.sim.ccparticleworld/3/32bpc/t0.5", 0x36635fe45324f86d),
("ec.sim.ccparticleworld/3/32bpc/t1.5", 0xf9751b9225a373a4),
("ec.sim.ccparticleworld/3/32bpc/t0.8", 0xb6026343f72dfaeb),
("ec.sim.ccparticleworld/3/32bpc/t2.2", 0x2f0e149de9623753),
("ec.sim.ccparticleworld/4/8bpc/t0.5", 0xd53dad7a75976197),
("ec.sim.ccparticleworld/4/8bpc/t1.5", 0x2cd0f3cbed038289),
("ec.sim.ccparticleworld/4/8bpc/t0.8", 0x46c089373ed50088),
("ec.sim.ccparticleworld/4/8bpc/t2.2", 0xfb17c5c3ba44657c),
("ec.sim.ccparticleworld/4/32bpc/t0.5", 0x80b338b7bb9794b1),
("ec.sim.ccparticleworld/4/32bpc/t1.5", 0x86811f65519e9790),
("ec.sim.ccparticleworld/4/32bpc/t0.8", 0x6aad5efc09bc64ff),
("ec.sim.ccparticleworld/4/32bpc/t2.2", 0x9957090d6fc97293),
("ec.sim.ccparticleworld/5/8bpc/t0.5", 0x56f989c5d7fc1eeb),
("ec.sim.ccparticleworld/5/8bpc/t1.5", 0x128313333a936e16),
("ec.sim.ccparticleworld/5/8bpc/t0.8", 0xa0efb8bdc0157788),
("ec.sim.ccparticleworld/5/8bpc/t2.2", 0x4af31455e2fe2631),
("ec.sim.ccparticleworld/5/32bpc/t0.5", 0xf3057d8cf6540f4a),
("ec.sim.ccparticleworld/5/32bpc/t1.5", 0x28203947d78e5ee3),
("ec.sim.ccparticleworld/5/32bpc/t0.8", 0xa6d8a9a848443344),
("ec.sim.ccparticleworld/5/32bpc/t2.2", 0xade682a437a4cba1),
("ec.sim.ccparticleworld/6/8bpc/t0.5", 0xa65b30a36baee78a),
("ec.sim.ccparticleworld/6/8bpc/t1.5", 0xbf7e4675fec18c48),
("ec.sim.ccparticleworld/6/8bpc/t0.8", 0xf98c7d9af9d6c9e2),
("ec.sim.ccparticleworld/6/8bpc/t2.2", 0xdf090357b8e4f471),
("ec.sim.ccparticleworld/6/32bpc/t0.5", 0x1721a9f149c922de),
("ec.sim.ccparticleworld/6/32bpc/t1.5", 0xf378db3b55dff048),
("ec.sim.ccparticleworld/6/32bpc/t0.8", 0x72a5d8dc0ea744ad),
("ec.sim.ccparticleworld/6/32bpc/t2.2", 0xfbb8e14088bb51ef),
("ec.sim.ccparticleworld/7/8bpc/t0.5", 0xc56801146ef15811),
("ec.sim.ccparticleworld/7/8bpc/t1.5", 0x3ca9b694e5e55f82),
("ec.sim.ccparticleworld/7/8bpc/t0.8", 0x2d72c095e0be6f47),
("ec.sim.ccparticleworld/7/8bpc/t2.2", 0x135b14387e6ea480),
("ec.sim.ccparticleworld/7/32bpc/t0.5", 0xad79b2f2d63d0c45),
("ec.sim.ccparticleworld/7/32bpc/t1.5", 0x902c6b68c6ed615d),
("ec.sim.ccparticleworld/7/32bpc/t0.8", 0x45045d7931c23788),
("ec.sim.ccparticleworld/7/32bpc/t2.2", 0xd8f8883374a3784f),
("ec.sim.ccparticleworld/8/8bpc/t0.5", 0xb681fe6e20dccbf3),
("ec.sim.ccparticleworld/8/8bpc/t1.5", 0xfa78174cb4fa5cd4),
("ec.sim.ccparticleworld/8/8bpc/t0.8", 0xd4f486333d843f09),
("ec.sim.ccparticleworld/8/8bpc/t2.2", 0xbee37590ce17b8b4),
("ec.sim.ccparticleworld/8/32bpc/t0.5", 0xccf4339bc42c3c01),
("ec.sim.ccparticleworld/8/32bpc/t1.5", 0xc51a8ee4e3c4a826),
("ec.sim.ccparticleworld/8/32bpc/t0.8", 0xee3d66e0c4ffb0ec),
("ec.sim.ccparticleworld/8/32bpc/t2.2", 0x449fc6d506e837fb),
("ec.sim.ccparticlesystems2/0/8bpc/t0.5", 0x3edb24bfeab4b00a),
("ec.sim.ccparticlesystems2/0/8bpc/t1.5", 0x78cb639f211cbd5b),
("ec.sim.ccparticlesystems2/0/8bpc/t0.8", 0x634c71924e4c68f1),
("ec.sim.ccparticlesystems2/0/8bpc/t2.2", 0xe09d41dcb6286423),
("ec.sim.ccparticlesystems2/0/32bpc/t0.5", 0xacdb6aec643a9bba),
("ec.sim.ccparticlesystems2/0/32bpc/t1.5", 0x4c50991034336999),
("ec.sim.ccparticlesystems2/0/32bpc/t0.8", 0xaacc2ea722f2e9e3),
("ec.sim.ccparticlesystems2/0/32bpc/t2.2", 0x1a5f7fc66db90a83),
("ec.sim.ccparticlesystems2/0/8bpc/half/t0.5", 0x8c89f83a2829dba1),
("ec.sim.ccparticlesystems2/0/8bpc/half/t1.5", 0x9239cd8895757d17),
("ec.sim.ccparticlesystems2/0/8bpc/half/t0.8", 0x91a16fb0a382d8e1),
("ec.sim.ccparticlesystems2/0/8bpc/half/t2.2", 0xc86d8250fe1402c5),
("ec.sim.ccparticlesystems2/1/8bpc/t0.5", 0xabade8d131837f05),
("ec.sim.ccparticlesystems2/1/8bpc/t1.5", 0x6a3566257b9a0bad),
("ec.sim.ccparticlesystems2/1/8bpc/t0.8", 0xc1199f209bad5c33),
("ec.sim.ccparticlesystems2/1/8bpc/t2.2", 0xaf337959d8264a5f),
("ec.sim.ccparticlesystems2/1/32bpc/t0.5", 0xb1816c2e5562be88),
("ec.sim.ccparticlesystems2/1/32bpc/t1.5", 0x02413f0ec8284e39),
("ec.sim.ccparticlesystems2/1/32bpc/t0.8", 0xd9bc645b90055a9a),
("ec.sim.ccparticlesystems2/1/32bpc/t2.2", 0x2c788bb5816167a3),
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