Match registered fluid shape caches and query-dependent initialization

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Ludovic Marie committed 2026-10-07 02:03:42 +02:00
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commit c958b6f823
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"crates/horizon-world/src/worldgen/blue_ice.rs": "eedd77bdaff808330b864166d303378096daa5c7d235e925770b171c05109247",
"crates/horizon-world/src/worldgen/bonus_chest.rs": "05d0f63fbc7412f13ba1fa37a7238114b8f70bfff318beb2dece590482d49cc0",
"crates/horizon-world/src/worldgen/bulk_section.rs": "eecf61532d7793f853884c5a18a7f436a59835c7b13d3ec9075804511553c9ba",
"crates/horizon-world/src/worldgen/carver/canyon.rs": "509c4d5a9d689849e98e894ab14a9fbf82d10707d38e9cc688ded3c4778df3e2",
"crates/horizon-world/src/worldgen/carver/generation.rs": "a4498d0d1457536de3922a08e9c40ccce8d2ef9cc263801c15a412327513c098",
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"crates/horizon-world/src/worldgen/chorus_plant.rs": "29224c164ede919e280a65a68f155c873e2c8fd0aa7d7e244d8fa9e468760250",
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"crates/horizon-world/src/worldgen/decoration.rs": "75a79b20b21e133816e729f16e758be6165d0db18a64bfbd5fd3618325a2adf3",
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"crates/horizon-world/src/worldgen/feature_sort.rs": "3488a093dfe1321aaa29d8a30cfb115d8e666a81bf195514e87b170de626835c",
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"crates/horizon-world/src/worldgen/height_provider.rs": "368d4dc119854742a045c4a717679c921456da681fc5f71aa9b37102d6f33b47",
"crates/horizon-world/src/worldgen/material_condition/codec.rs": "09b909bc384472f76d163c8069ec6b507c7d5c6a028a36d5e0e3df20deff7b3b",
"crates/horizon-world/src/worldgen/material_condition/density.rs": "df9d0761e978e5010663ae8b44f2d6c1ecb4907331e333bdb6a2b487c1e107de",
"crates/horizon-world/src/worldgen/material_condition/library.rs": "a55534c5da97575a819af5a7dc0dbec9069993fa8b2619c6c9d5576946e683fa",
"crates/horizon-world/src/worldgen/material_condition/noise.rs": "ffb59cc6be2275d7a5621bf7d768527e74a8326ed7ad78618746711540921675",
"crates/horizon-world/src/worldgen/material_condition/rule.rs": "fed643352efbcb1f68f29b6241896617db889fc7c577a6247564e01922fec1fe",
"crates/horizon-world/src/worldgen/material_condition.rs": "d638dcb8cbcb5da20b3cb29602b0ae6a86c4fdf9d8c0fb725de8ec5fc108717e",
"crates/horizon-world/src/worldgen/material_extensions.rs": "ab806eb679d5116e1aebb64fca70e1499ae71f83c9507a8cb4c3201c2b1bf037",
"crates/horizon-world/src/worldgen/material_stage.rs": "698cbc786eff13c246e2bc2ea062401918cd4265899fbc3d53abc87e45a8e7a1",
"crates/horizon-world/src/worldgen/material_surface.rs": "5d37b90099df3d6da0845dab164e71469fb287019c2ee74bc6714f3b9d6d6d5b",
"crates/horizon-world/src/worldgen/ore_feature.rs": "83b89fd3be691c5412c0215b6abefdcaa44119a05aa41217e061970eb7e12ebd",
"crates/horizon-world/src/worldgen/placement/chain.rs": "9218399b4d3757f7bbc550d7729a7201f32a1c83a7030865e0c12aab8a80d116",
"crates/horizon-world/src/worldgen/placement/context.rs": "a278304795136677ad4b4933ea50c972b9729a1c671c03fa309c193e224b1fd6",
"crates/horizon-world/src/worldgen/placement/layer.rs": "a0f5ca776f33f9d4f72b8fdcd163426152e5e43cb4a7572fc1d4fc57bf965de1",
"crates/horizon-world/src/worldgen/placement.rs": "b0397e5818fae84358546193a95f84bcb0b5bffafce909e6fcb3386179ee8023",
"crates/horizon-world/src/worldgen/replace_blobs.rs": "bf3377d86d2570cd15288ba69dde64a2cf67c5bcbb9a31d0c23421964af74afa",
"crates/horizon-world/src/worldgen/router.rs": "2cee7cf15a0d2ada12be6b39d83e78177fd3033922e4f4cce87a64073cec2847",
"crates/horizon-world/src/worldgen/rule_test.rs": "d1662ec492489ebaa4b87e20f9a8c809dcf3a223a151211bd65ec241a63692fc",
"crates/horizon-world/src/worldgen/settings.rs": "a8fe87752e1982ef11cb67f8d80d8e3428b2c27db178044cb425ba803e689e59",
"crates/horizon-world/src/worldgen/simple_block.rs": "9ba1a88d5db4925f8c37366557887f776c805f9a6444781615b5dbaff52e92a4",
"crates/horizon-world/src/worldgen/snow_freeze.rs": "9040be3d5c7f8f0fd812d2df45e154bf8a9eeef038530b83fa4159d246eac35f",
"crates/horizon-world/src/worldgen/speleothem.rs": "c71651c1c97818a8a85863e14414d6139ea3bdeb897fa422043bcc1499d99aae",
"crates/horizon-world/src/worldgen/spike.rs": "eacf0d9d3d2bc3d4bcf62bc87555f90031138236a5bfef0eb5270204f7c2a4fc",
"crates/horizon-world/src/worldgen/spring.rs": "830849e9b89fcdf09e9b06fbefdcdebe3c8c3f82804f60b8bd5de04ba303cb62",
"crates/horizon-world/src/worldgen/state_provider/catalog.rs": "c8687e15a4887a9200c8d365857d801efaa8f90e669eee3e600a1db4905119eb",
"crates/horizon-world/src/worldgen/state_provider/noise.rs": "7ee369c2a032e5620cb9bdf9ee7adad1f70870fb0a27efb7b7c514d92f83491f",
"crates/horizon-world/src/worldgen/state_provider/properties.rs": "9909139aaca1dc4f743957257fadaa9d423d21fa401fa9abc050505f79365139",
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"crates/horizon-world/src/worldgen/tags.rs": "d35ded93fe6e95ea045cadcf4925e656dc34ef832b742179b9ad0cc49f902f31",
"crates/horizon-world/src/worldgen/terrain.rs": "fd1f2e0afc15daf66f484ea40a1f2b7013650bda0941b23c64c81ee9f79cb673",
"crates/horizon-world/src/worldgen/underwater_magma.rs": "7317e40af5ee5a9780f90ce358fa5d3e7f5b3d513b731df6ff97754d9c2a0154",
"crates/horizon-world/src/worldgen/value_provider.rs": "3358b563db8cb0bc8a9cfbbe2b8b3e70941cd2d37a0b519fbb6545f8d0dcbb69",
"crates/horizon-world/src/worldgen/vines.rs": "ee9b79b65012bd86a838241d2ef708680f7fe8eafc8aa656dae9cf2abf3c6418",
"crates/horizon-world/src/worldgen/weighted.rs": "839840aae25302933bbd97a81a2336330e2d03a0ad1684e1e16ac769ed408e6b",
"crates/horizon-world/src/worldgen/write_zone.rs": "8e17a179764d3f68c05882aef35f6810c28a0000f9a83e58bd6030660b76e64e",
"crates/horizon-world/src/worldgen.rs": "e8e9f099ee1fcec8eedce31805d676d3f89c18e84f494a147ffcbfee23d3d54f",
"crates/horizon-world/examples/fluid_shape_fixture.rs": "7187c803bfbc53bc9694c6f3dedacb8fcf9e43129b505ad6d6847273ecdbc400"
},
"fixtures_sha256": {
".local/rust-fluid-shape-parity/inputs.txt": "9585317fda212bee3f6acc7129447e1a7fd190be10584691bcc72f04351d8fb2",
".local/rust-fluid-shape-parity/fluid-states.json": "f888b2d7adf0ee194a08900e6df9909933734b5d8dab648dc3e866d70ef3b659"
},
"rust_output_sha256": "82e11af0b7abd2dd60e288e4af1d2c1becf910476600c199f4f0bb7eadb292d1",
"references": [
{
"side": "client",
"jar_sha256": "4508d006323f24fa02876310c192d739af56516eb259000ac50f0909a68c9a2d",
"output_sha256": "82e11af0b7abd2dd60e288e4af1d2c1becf910476600c199f4f0bb7eadb292d1",
"matched_output_lines": 387950
},
{
"side": "server",
"jar_sha256": "a362163eec5d1612d520772bc16e5b39c09e3b234fdc045f56bf544284ee8ae6",
"output_sha256": "82e11af0b7abd2dd60e288e4af1d2c1becf910476600c199f4f0bb7eadb292d1",
"matched_output_lines": 387950
}
],
"scope": "Actual registered FluidState.getShape and FlowingFluid first-query shape caches over every native fluid state. Compares ordered above-fluid queries, cached-state counts, shape geometry, canonical empty/full identities and aliases across repeated states. Sequences change above fluids, positions, failure points and query order; failed height reads do not populate a cache. Caches are reset between sequences and shared across world views within each sequence. Fluid propagation, entity immersion, registered world ray binding and full gameplay remain separate work."
}
@@ -0,0 +1,97 @@
use horizon_core::{
geometry::{Axis, VoxelShape},
position::BlockPos,
};
use horizon_world::{
fluid::{FluidHeightWorld, FluidState},
fluid_shape::FluidShapeCache,
};
use serde_json::Value;
use std::{
fs,
io::{self, Write},
path::Path,
};
struct World<'a> {
out: &'a mut dyn Write,
calls: i64,
fail: i64,
above: FluidState,
}
impl FluidHeightWorld for World<'_> {
type Error = io::Error;
fn fluid(&mut self, p: [i32; 3]) -> io::Result<FluidState> {
writeln!(self.out, "fluid {} {} {}", p[0], p[1], p[2])?;
let call = self.calls;
self.calls += 1;
if call == self.fail {
Err(io::Error::other("injected fluid height failure"))
} else {
Ok(self.above)
}
}
fn sturdy_down(&mut self, _: [i32; 3]) -> io::Result<bool> {
panic!("ray shape does not use camera immersion support")
}
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
let arg = std::env::args().nth(1).expect("private fixture directory");
let dir = Path::new(&arg);
let mut out = io::BufWriter::new(fs::File::create(dir.join("rust.txt"))?);
for line in fs::read_to_string(dir.join("inputs.txt"))?.lines() {
let f: Value = serde_json::from_str(line)?;
let mut cache = FluidShapeCache::default();
let mut identities = Vec::<VoxelShape>::new();
for op in f["ops"].as_array().unwrap() {
let state = FluidState::from_json(&op["state"].to_string())?;
let above = FluidState::from_json(&op["above"].to_string())?;
let p = &op["position"];
let p = BlockPos::new(
p[0].as_i64().unwrap() as i32,
p[1].as_i64().unwrap() as i32,
p[2].as_i64().unwrap() as i32,
);
let mut world = World {
out: &mut out,
calls: 0,
fail: op["fail"].as_i64().unwrap(),
above,
};
match cache.shape(&mut world, state, p) {
Ok(s) => {
let id = identities
.iter()
.position(|old| old.same_identity(&s))
.unwrap_or_else(|| {
identities.push(s.clone());
identities.len() - 1
});
writeln!(world.out, "identity {id}")?;
writeln!(
world.out,
"shape {} {} {}",
s.same_identity(&VoxelShape::empty()),
s.same_identity(&VoxelShape::block()),
s.boxes().len()
)?;
for b in s.boxes() {
writeln!(
world.out,
"box {:016x} {:016x} {:016x} {:016x} {:016x} {:016x}",
b.min(Axis::X).to_bits(),
b.min(Axis::Y).to_bits(),
b.min(Axis::Z).to_bits(),
b.max(Axis::X).to_bits(),
b.max(Axis::Y).to_bits(),
b.max(Axis::Z).to_bits()
)?;
}
}
Err(_) => writeln!(world.out, "error")?,
}
writeln!(world.out, "cached {}", cache.cached_states())?;
writeln!(world.out, "queries {}", world.calls)?;
}
}
Ok(())
}
+47
View File
@@ -0,0 +1,47 @@
//! Persistent pinned-fluid collision/ray shapes, including first-query caching.
use crate::fluid::{FluidHeightWorld, FluidKind, FluidState};
use horizon_core::{
geometry::{Aabb, Vec3, VoxelShape},
position::BlockPos,
};
/// Share this cache across world views using the same fluid registry, as native
/// registered Fluid instances retain their shape maps across world queries.
/// The pinned registry has no amount-nine state; amounts are zero through eight.
pub struct FluidShapeCache {
shapes: Vec<Option<VoxelShape>>,
}
impl Default for FluidShapeCache {
fn default() -> Self {
Self {
shapes: vec![None; 5 * 18],
}
}
}
impl FluidShapeCache {
pub fn cached_states(&self) -> usize {
self.shapes.iter().filter(|v| v.is_some()).count()
}
pub fn shape<W: FluidHeightWorld>(
&mut self,
world: &mut W,
state: FluidState,
position: BlockPos,
) -> Result<VoxelShape, W::Error> {
if state.kind() == FluidKind::Empty {
return Ok(VoxelShape::empty());
}
let index = state.kind() as usize * 18
+ usize::from(state.falling()) * 9
+ usize::from(state.amount());
if let Some(shape) = &self.shapes[index] {
return Ok(shape.clone());
}
let height = f64::from(state.height_at(world, [position.x, position.y, position.z])?);
// FluidState validates all amounts and height_at returns [0,1].
let shape = VoxelShape::from_box(Aabb::new(Vec3::ZERO, Vec3::new(1.0, height, 1.0)))
.expect("validated pinned fluid height");
self.shapes[index] = Some(shape.clone());
Ok(shape)
}
}
+1
View File
@@ -23,6 +23,7 @@ pub mod entity_move;
pub mod entity_obstruction;
pub mod fall_damage;
pub mod fluid;
pub mod fluid_shape;
pub mod ground_support;
pub mod heightmap;
pub mod liquid_collision;
+16
View File
@@ -772,3 +772,19 @@ failures. Targeted Clippy passes. Separate limit tests distinguish a miss from
nonfinite geometry, exhausted traversal budget and failed world reads. Shapes
and state predicates are controlled; registered shape binding, actual fluid
shape caching and full entity/world integration remain pending.
`FluidShapeCache` matches native registered-fluid shape caching. The first
successful lookup of a nonempty fluid state samples the fluid above and retains
its resulting shape across later positions/world views. Failed reads leave the
state uncached. Empty and full cube shapes preserve canonical identity; distinct
noncanonical cached shapes retain their own identities.
`python3 tools/test_fluid_shape_parity.py` runs every registered native fluid state
in changing query sequences. The
[fluid shape report](../benchmarks/rust-fluid-shape-2026-10-07/scoped-parity.json)
records **387,950 matching lines per JAR** across **5,181 sequences**, comparing
geometry, cache population, canonical/alias identities, query suppression and
failures. Targeted Clippy passes. The pinned registry has no amount-nine state;
unsupported custom fluid definitions are outside this module. Fluid propagation,
entity immersion and live world/ray integration remain pending.
@@ -0,0 +1,27 @@
package dev.horizonlab.parity;
import com.google.gson.*;
import com.mojang.serialization.JsonOps;
import java.io.*;
import java.lang.reflect.*;
import java.nio.file.*;
import java.util.*;
import net.minecraft.core.*;
import net.minecraft.world.level.*;
import net.minecraft.world.level.material.*;
import net.minecraft.world.phys.shapes.*;
/** Native registered fluid shapes over changing world snapshots and shared caches. */
public final class VanillaFluidShapeOracle {
static final class Stop extends RuntimeException {}
static FluidState state(JsonElement v){return FluidState.CODEC.parse(JsonOps.INSTANCE,v).getOrThrow();}
static void emit(PrintWriter out,VoxelShape shape,IdentityHashMap<VoxelShape,Integer> ids){out.println("identity "+ids.computeIfAbsent(shape,k->ids.size()));out.println("shape "+(shape==Shapes.empty())+" "+(shape==Shapes.block())+" "+shape.toAabbs().size());for(var b:shape.toAabbs())out.printf("box %016x %016x %016x %016x %016x %016x%n",Double.doubleToLongBits(b.minX),Double.doubleToLongBits(b.minY),Double.doubleToLongBits(b.minZ),Double.doubleToLongBits(b.maxX),Double.doubleToLongBits(b.maxY),Double.doubleToLongBits(b.maxZ));}
public static void main(String[] args)throws Exception {
net.minecraft.SharedConstants.tryDetectVersion();net.minecraft.server.Bootstrap.bootStrap();Path dir=Path.of(args[1]);var caches=FlowingFluid.class.getDeclaredField("shapes");caches.setAccessible(true);
if(args[0].equals("export")){var states=new JsonArray();for(var s:Fluid.FLUID_STATE_REGISTRY){if(s.getAmount()>8)throw new AssertionError("new fluid amount");states.add(FluidState.CODEC.encodeStart(JsonOps.INSTANCE,s).getOrThrow());}Files.writeString(dir.resolve("fluid-states.json"),states.toString());return;}
try(var out=new PrintWriter(Files.newBufferedWriter(dir.resolve(args[0]+".txt")));var lines=Files.lines(dir.resolve("inputs.txt"))){for(var line:(Iterable<String>)lines::iterator){
var f=JsonParser.parseString(line).getAsJsonObject();for(var fluid:List.of(Fluids.WATER,Fluids.FLOWING_WATER,Fluids.LAVA,Fluids.FLOWING_LAVA))((Map<?,?>)caches.get(fluid)).clear();
var identities=new IdentityHashMap<VoxelShape,Integer>();for(var value:f.getAsJsonArray("ops")){var op=value.getAsJsonObject();int[] calls={0};var s=state(op.get("state"));var above=state(op.get("above"));var p=op.getAsJsonArray("position");var position=new BlockPos(p.get(0).getAsInt(),p.get(1).getAsInt(),p.get(2).getAsInt());var world=(BlockGetter)Proxy.newProxyInstance(BlockGetter.class.getClassLoader(),new Class<?>[]{BlockGetter.class},(proxy,method,values)->{if(method.getName().equals("getFluidState")){var q=(BlockPos)values[0];out.println("fluid "+q.getX()+" "+q.getY()+" "+q.getZ());if(calls[0]++==op.get("fail").getAsInt())throw new Stop();return above;}throw new AssertionError(method);});
try{emit(out,s.getShape(world,position),identities);}catch(Stop e){out.println("error");}int count=0;for(var fluid:List.of(Fluids.WATER,Fluids.FLOWING_WATER,Fluids.LAVA,Fluids.FLOWING_LAVA))count+=((Map<?,?>)caches.get(fluid)).size();out.println("cached "+count);out.println("queries "+calls[0]);
}
}}
}
}
+64
View File
@@ -0,0 +1,64 @@
#!/usr/bin/env python3
"""Compare cached registered fluid shapes and lazy height queries with vanilla."""
import argparse
import json
import os
from pathlib import Path
import platform
import subprocess
import random
import struct
import math
try:
from . import lab, test_rust_parity as base
except ImportError:
import lab
import test_rust_parity as base
def corpus(states):
empty=next(s for s in states if s['id']=='minecraft:empty')
def op(state,above,p=(17,-64,-33),fail=-1):return dict(state=state,above=above,position=p,fail=fail)
for state in states:
for above in states:
for fail in [-1,0,1]:
yield dict(ops=[op(state,above,fail=fail),op(state,empty,p=(1,2,3),fail=0),op(state,above,p=(-1,-2,-3)),op(state,empty)])
for above in states:
for fail in [-1,0]:
yield dict(ops=[*[op(state,above,p=(2147483647,2147483647,-2147483648),fail=fail) for state in states],*[op(state,empty,p=(-2147483648,-2147483648,2147483647)) for state in reversed(states)],*[op(state,above,fail=0) for state in states]])
rng=random.Random(0x464c554944534850)
for _ in range(1000):yield dict(ops=[op(rng.choice(states),rng.choice(states),p=rng.choice([(17,-64,-33),(0,0,0),(2147483647,2147483647,-2147483648)]),fail=rng.choice([-1,-1,0,1])) for _ in range(rng.randrange(1,100))])
def main():
parser=argparse.ArgumentParser(description=__doc__);parser.add_argument('--prepare',action='store_true');args=parser.parse_args()
build=lab.LOCAL/'rust-fluid-shape-parity';build.mkdir(parents=True,exist_ok=True)
report_path=build/'report.json';report_path.unlink(missing_ok=True)
if args.prepare:lab.prepare()
lock,jars,libraries=base.verify_artifacts()
oracle=lab.ROOT/'mods/horizon/src/test/java/dev/horizonlab/parity/VanillaFluidShapeOracle.java'
sources=[oracle,Path(__file__),lab.ROOT/'tools/test_rust_parity.py',lab.ROOT/'tools/lab.py',lab.ROOT/'Cargo.toml',lab.ROOT/'Cargo.lock',lab.ROOT/'crates/horizon-core/Cargo.toml',lab.ROOT/'crates/horizon-world/Cargo.toml',*sorted((lab.ROOT/'crates/horizon-core/src').rglob('*.rs')),*sorted((lab.ROOT/'crates/horizon-world/src').rglob('*.rs')),lab.ROOT/'crates/horizon-world/examples/fluid_shape_fixture.rs']
tested_sources=base.source_hashes(sources)
classes=build/'classes';classes.mkdir(exist_ok=True)
def run(command,name):
with (build/(name+'.log')).open('w',encoding='utf-8') as log:base.run(list(map(str,command)),stdout=log,stderr=subprocess.STDOUT)
dependency_path=os.pathsep.join(map(str,libraries))
run(['javac','--release',lock['minecraft']['java_major'],'-proc:none','-cp',str(jars['server'])+os.pathsep+dependency_path,'-d',classes,oracle],'compile-java')
def java(side,mode,path):
run(['java','-Xmx512M','-cp',os.pathsep.join([str(classes),str(jars[side]),dependency_path]),'dev.horizonlab.parity.VanillaFluidShapeOracle',mode,path],side+'-'+mode)
java('server','export',build);states=json.loads((build/'fluid-states.json').read_text());fixtures=list(corpus(states));inputs=build/'inputs.txt';inputs.write_text(''.join(json.dumps(value,separators=(',',':'))+'\n' for value in fixtures),encoding='utf-8')
fixture_paths=[inputs,build/'fluid-states.json'];tested_fixtures=base.source_hashes(fixture_paths)
run(['cargo','build','--release','-p','horizon-world','--example','fluid_shape_fixture'],'compile-rust')
metadata=json.loads(subprocess.check_output(['cargo','metadata','--no-deps','--format-version','1'],cwd=lab.ROOT,text=True))
binary=Path(metadata['target_directory'])/'release/examples'/('fluid_shape_fixture.exe' if os.name=='nt' else 'fluid_shape_fixture')
run([binary,build],'rust');references=[]
for side,jar in jars.items():
java(side,side,build);reference=build/f'{side}.txt';matched=base.compare(reference,build/'rust.txt')
references.append({'side':side,'jar_sha256':lab.digest(jar,'sha256'),'output_sha256':lab.digest(reference,'sha256'),'matched_output_lines':matched})
print(f'{side}: {matched:,} fluid-shape output lines match Rust',flush=True)
base.ensure_sources_unchanged(sources,tested_sources);base.ensure_sources_unchanged(fixture_paths,tested_fixtures)
report={'schema':1,'minecraft':lock['minecraft']['version'],'manifest_sha1':lock['minecraft']['manifest_sha1'],'platform':platform.platform(),'java':subprocess.check_output(['java','--version'],text=True).splitlines()[0],'rustc':subprocess.check_output(['rustc','--version'],text=True).strip(),'fixtures':len(fixtures),'sources_sha256':tested_sources,'fixtures_sha256':tested_fixtures,'rust_output_sha256':lab.digest(build/'rust.txt','sha256'),'references':references,'scope':'Actual registered FluidState.getShape and FlowingFluid first-query shape caches over every native fluid state. Compares ordered above-fluid queries, cached-state counts, shape geometry, canonical empty/full identities and aliases across repeated states. Sequences change above fluids, positions, failure points and query order; failed height reads do not populate a cache. Caches are reset between sequences and shared across world views within each sequence. Fluid propagation, entity immersion, registered world ray binding and full gameplay remain separate work.'}
lab.write_json(report_path,report);print(f'Scoped fluid shape parity passed: {report_path}')
if __name__=='__main__':main()