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Connect generation-time destruction to resident region writes

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Ludovic Marie
2026-10-06 14:20:49 +02:00
parent 53ff11164e
commit 0a63903b91
7 changed files with 279 additions and 5 deletions
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benchmarks/rust-feature-region-destroy-2026-10-06/scoped-parity.json
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{
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"platform": "Linux-7.0.0-31-generic-x86_64-with-glibc2.43",
"java": "openjdk 25.0.4.1 2026-08-18",
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"crates/horizon-world/src/worldgen/feature_region.rs": "2ec6aa6231597388a16ccde4812ef69fa26a149e46b976c21a12dcfd7e981a96",
"crates/horizon-world/src/worldgen/feature_sort.rs": "3488a093dfe1321aaa29d8a30cfb115d8e666a81bf195514e87b170de626835c",
"crates/horizon-world/src/worldgen/fluid_predicate.rs": "64197c9e63bebf1ce04bc280bfe980bb6c1b9aa887ca5cded904aeb0d9ae6c46",
"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",
"crates/horizon-world/src/worldgen/state_provider.rs": "be29ada818826a90afe01ab60916360fdfc4cbde5af15c9359cd56b1f1f7b156",
"crates/horizon-world/src/worldgen/tags.rs": "d35ded93fe6e95ea045cadcf4925e656dc34ef832b742179b9ad0cc49f902f31",
"crates/horizon-world/src/worldgen/terrain.rs": "b8fb9fb80a66a851d916f07f15df1a40b6cc95b49e71aaec4d4b4107f13d9f9f",
"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.rs": "1dd9ccc9c555e29b52eb5eec591da98bbd9e68921196106d18793d993647592b",
"crates/horizon-world/examples/feature_region_fixture.rs": "b1272565bf7056b7976797e79167f1f4f43c8c7a03a594cc7b93936a4df804d8"
},
"fixtures_sha256": {
".local/rust-feature-region-parity/inputs.txt": "8660737853afa958450f3ec15679136379bd8f0b21b1198454982d6ea5424f7d",
".local/rust-feature-region-parity/tags.json": "36975358262568f32bf84778d63d9989a36e7394ed4796d70a34809a8f4a64f0",
".local/rust-feature-region-parity/fluid-tags.json": "f1e5eb6d22ea7effbb118a2282709cfdeef1bfae4516b775a55ad7a4df29d7d0",
".local/rust-feature-region-parity/facts-client.json": "1d24883ee807b0b71473f0bbf8ed548ddaf712148caeb3fcc7aa13ab973a97b0",
".local/rust-feature-region-parity/facts-server.json": "1d24883ee807b0b71473f0bbf8ed548ddaf712148caeb3fcc7aa13ab973a97b0"
},
"rust_output_sha256": "b63e8f2fc86c4d3d8d9d9c1a900dcb164444d93fb4ff71bebd902f92c1eb8d3f",
"references": [
{
"side": "client",
"jar_sha256": "4508d006323f24fa02876310c192d739af56516eb259000ac50f0909a68c9a2d",
"output_sha256": "b63e8f2fc86c4d3d8d9d9c1a900dcb164444d93fb4ff71bebd902f92c1eb8d3f",
"matched_output_lines": 29502523
},
{
"side": "server",
"jar_sha256": "a362163eec5d1612d520772bc16e5b39c09e3b234fdc045f56bf544284ee8ae6",
"output_sha256": "b63e8f2fc86c4d3d8d9d9c1a900dcb164444d93fb4ff71bebd902f92c1eb8d3f",
"matched_output_lines": 29502523
}
],
"scope": "Native FeaturePlacer and three basic block-writing features, a composed sequence of four configured fill layers, single-block replacements, scattered ore and water springs share a world proxy backed by nine actual ProtoChunks. Configured water, horizontal logs, air, out-of-height fills and ore/replacement rules test graph-to-region binding. Initial two-layer stone/dirt terrain, both pre-light heightmap groups, count/square/heightmap/layered modifier chains, repeated placements, direct and WorldgenRandom-wrapped random streams, missing-neighbor errors, rejected writes and injected partial failures are compared. Final complete raw sections, heightmap presence and packed words are compared alongside ordered feature writes, update flags, explicit height queries and subsequent random draws. Rust uses resident registry-backed chunks, lazy heightmap priming and a caller-supplied write callback; imported air/fluid facts and bundled block tags bind independently across authenticated JARs. The proxy supplies storage mutation and actual native default scheduleTick/createTick methods routed through WorldGenTickAccess into each ProtoChunk. Separate block/fluid queues, first-request deduplication, nondefault-state block identity, shared tick-order advancement on duplicates and missing-chunk errors, out-of-height requests and wrapped clock values are compared, including saved queue order and priorities. Active and inactive End podiums additionally exercise native WorldGenRegion.destroyBlock through a subclass transport overriding only block reads and writes; air short-circuit, rejected replacements and write failures retain the generation-time semantics. All block states are also written into resident chunks, queried through feature access, cleared and queried again; contained fluid identity/amount/falling/source/full flags, water-tag membership and every bundled block tag plus an absent tag are compared. Negative coordinates, chunk edges, outside-height and absent chunks are covered. Block/fluid query bindings are an immutable registry-checked shared snapshot. Actual WorldGenRegion construction, write-zone policy, POIs, block entities, postprocessing execution, lighting, block/fluid tick execution, complete feature registries and complete world generation remain outside this comparison."
}
crates/horizon-world/examples/feature_region_fixture.rs
+7 -1
View File
@@ -267,7 +267,13 @@ fn run(
registry.default_state("minecraft:air").unwrap(),
] {
region.set_block_worldgen(p, state)?;
let mut world = TerrainFeatureAccess::new(&mut region, ());
let mut world = TerrainFeatureAccess::new(
&mut region,
|_: &mut TerrainRegion<'_, Properties<'_>>,
_: [i32; 3],
_: BlockStateId,
_: i32| Ok::<_, RegionError>(false),
);
query_state(&mut world, p, tags, out)?;
}
}
crates/horizon-world/src/worldgen/feature_region.rs
+23 -1
View File
@@ -383,7 +383,29 @@ impl<'a, 'r, B: TerrainBlockStates, F> TerrainFeatureAccess<'a, 'r, B, F> {
Self { region, write }
}
}
impl<B: TerrainBlockStates, F> PlacementContext for TerrainFeatureAccess<'_, '_, B, F> {
impl<'r, B: TerrainBlockStates, F> PlacementContext for TerrainFeatureAccess<'_, 'r, B, F>
where
F: FnMut(&mut TerrainRegion<'r, B>, [i32; 3], BlockStateId, i32) -> Result<bool, RegionError>,
{
fn destroy_block_without_entity(
&mut self,
position: [i32; 3],
_drop_resources: bool,
) -> Result<bool, PlacementQueryError> {
// WorldGenRegion destruction is an air replacement through its write
// policy. It does not evaluate drops, unlike live-level destruction.
let chunk = self.region.chunk(position[0] >> 4, position[2] >> 4)?;
let state = chunk.block(position[0], position[1], position[2]);
if chunk.block_properties(state).is_air() {
return Ok(false);
}
let air = chunk
.registry()
.default_state("minecraft:air")
.expect("validated air state");
(self.write)(self.region, position, air, 3).map_err(Into::into)
}
fn fluid_state(
&mut self,
position: [i32; 3],
docs/rust-parity.md
+16
View File
@@ -781,3 +781,19 @@ defaults and boundaries; both random streams; rejected writes; partial failures;
repeated mutation; wrapped positions; and composition. Workspace tests and
all-target Clippy pass. Neighbor updates, falling behavior, fluid simulation,
larger clusters and complete cave generation remain pending.
## Generation-time destruction on resident chunks
Feature access now routes destruction through its supplied write callback using
air and update flags `3`. Air is an immediate false result. This follows
`WorldGenRegion.destroyBlock`, whose generation-time path does not evaluate drops;
live-level destruction remains separate work.
The [resident destruction comparison](../benchmarks/rust-feature-region-destroy-2026-10-06/scoped-parity.json)
matches **29,502,523 lines per reference JAR** across **192 fixtures**, adding
active/inactive End podiums to the resident feature corpus. The reference invokes
the actual WorldGenRegion method through a subclass that transports reads/writes
to the existing chunk fixture. Final sections, heightmaps, ticks, tag/fluid probes,
rejected writes and partial failures still agree. Workspace tests, all-target
Clippy and all 149 Python tests pass. Write-zone policy, POIs, block entities,
postprocessing execution, lighting and live-world effects remain pending.
mods/horizon/src/test/java/dev/horizonlab/parity/VanillaFeatureRegionOracle.java
+19
View File
@@ -25,6 +25,19 @@ import net.minecraft.world.level.levelgen.placement.*;
/** Native feature placement into resident ProtoChunks through a world transport. */
public final class VanillaFeatureRegionOracle {
// Execute the actual native destruction method with resident storage as its
// world transport; no ServerLevel constructor or copied destruction body.
private static final class NativeDestruction extends net.minecraft.server.level.WorldGenRegion {
WorldGenLevel world;
private NativeDestruction(){super(null,null,null,null);}
@Override public BlockState getBlockState(BlockPos p){return world.getBlockState(p);}
@Override public boolean setBlock(BlockPos p,BlockState state,int flags,int recursion){return world.setBlock(p,state,flags,recursion);}
}
private static NativeDestruction destruction(WorldGenLevel world)throws ReflectiveOperationException {
var field=sun.misc.Unsafe.class.getDeclaredField("theUnsafe");field.setAccessible(true);
var value=(NativeDestruction)((sun.misc.Unsafe)field.get(null)).allocateInstance(NativeDestruction.class);value.world=world;return value;
}
private static ProtoChunk chunk(Map<ChunkPos,ProtoChunk> chunks,int x,int z) {
var chunk=chunks.get(new ChunkPos(x>>4,z>>4));if(chunk==null)throw new IllegalArgumentException("missing region chunk");return chunk;
}
@@ -93,7 +106,12 @@ public final class VanillaFeatureRegionOracle {
var fluidTicks=new WorldGenTickAccess<Fluid>(p->chunk(chunks,p.getX(),p.getZ()).getFluidTicks());
long[] tickOrder={f.get("tick_order").getAsLong()};
int[] calls={0};int fail=f.get("fail").getAsInt(),reject=f.get("reject").getAsInt();
NativeDestruction[] destroyer={null};
var world=(WorldGenLevel)Proxy.newProxyInstance(WorldGenLevel.class.getClassLoader(),new Class<?>[]{WorldGenLevel.class},(proxy,method,values)->switch(method.getName()) {
case "destroyBlock"->{
if(method.isDefault())yield InvocationHandler.invokeDefault(proxy,method,values);
yield destroyer[0].destroyBlock((BlockPos)values[0],(Boolean)values[1],(net.minecraft.world.entity.Entity)values[2],(Integer)values[3]);
}
case "getBlockTicks"->blockTicks;
case "getFluidTicks"->fluidTicks;
case "getGameTime"->f.get("game_time").getAsLong();
@@ -118,6 +136,7 @@ public final class VanillaFeatureRegionOracle {
}
default->throw new AssertionError("unexpected world method "+method);
});
destroyer[0]=destruction(world);
var modifiers=new ArrayList<PlacementModifier>();for(var value:f.getAsJsonArray("placement"))modifiers.add(PlacementModifier.CODEC.parse(JsonOps.INSTANCE,value).getOrThrow());
var placer=new FeaturePlacer(world,generator);
for(int repeat=0;repeat<2;repeat++) {
tests/test_feature_region_parity.py
+2 -1
View File
@@ -12,7 +12,8 @@ class FeatureRegionCorpusTests(unittest.TestCase):
self.assertEqual(fixtures, list(regions.corpus(facts)))
self.assertEqual(sorted(i for f in fixtures for i in f['probe_states']), list(range(len(facts['states']))))
self.assertTrue(all(len(f['tick_commands']) == 77 for f in fixtures))
self.assertTrue(all(f['features'][-1]['type'] == 'spring_feature' for f in fixtures))
self.assertTrue(all(any(v['type'] == 'spring_feature' for v in f['features']) for f in fixtures))
self.assertTrue(all([v['active'] for v in f['features'] if v['type'] == 'end_podium'] == [False, True] for f in fixtures))
self.assertEqual({f['worldgen'] for f in fixtures}, {False, True})
self.assertEqual({f['legacy'] for f in fixtures}, {False, True})
self.assertEqual({f['stage'] for f in fixtures}, {'empty', 'terrain'})
tools/test_feature_region_parity.py
+2 -2
View File
@@ -28,7 +28,7 @@ def configured_features(*, include_springs=True):
def corpus(facts):
features=configured_features()
features=configured_features()+[{'type':'end_podium','active':active} for active in [False,True]]
get=lambda name:facts['defaults']['minecraft:'+name]
log_x=next(i for i,state in enumerate(facts['states']) if state[4]['id']=='minecraft:oak_log' and state[4].get('properties',{}).get('axis')=='x')
ticks=[]
@@ -108,7 +108,7 @@ def main():
"java":subprocess.check_output(["java","--version"],text=True).splitlines()[0],"rustc":subprocess.check_output(["rustc","--version"],text=True).strip(),
"block_states":len(facts["states"]),"direct_state_probes":sum(len(f["probe_states"]) for f in fixtures),"block_tag_files":len(tags),"fixtures":len(fixtures),"worldgen_random_modes":[False,True],"resident_chunks_per_fixture":9,"requested_placements":sum(len(f["features"])*2 for f in fixtures),"direct_tick_requests":sum(len(f["tick_commands"]) for f in fixtures),
"sources_sha256":tested_sources,"fixtures_sha256":tested_fixtures,"rust_output_sha256":lab.digest(build/"rust.txt","sha256"),"references":references,
"scope":"Native FeaturePlacer and three basic block-writing features, a composed sequence of four configured fill layers, single-block replacements, scattered ore and water springs share a world proxy backed by nine actual ProtoChunks. Configured water, horizontal logs, air, out-of-height fills and ore/replacement rules test graph-to-region binding. Initial two-layer stone/dirt terrain, both pre-light heightmap groups, count/square/heightmap/layered modifier chains, repeated placements, direct and WorldgenRandom-wrapped random streams, missing-neighbor errors, rejected writes and injected partial failures are compared. Final complete raw sections, heightmap presence and packed words are compared alongside ordered feature writes, update flags, explicit height queries and subsequent random draws. Rust uses resident registry-backed chunks, lazy heightmap priming and a caller-supplied write callback; imported air/fluid facts and bundled block tags bind independently across authenticated JARs. The proxy supplies storage mutation and actual native default scheduleTick/createTick methods routed through WorldGenTickAccess into each ProtoChunk. Separate block/fluid queues, first-request deduplication, nondefault-state block identity, shared tick-order advancement on duplicates and missing-chunk errors, out-of-height requests and wrapped clock values are compared, including saved queue order and priorities. All block states are also written into resident chunks, queried through feature access, cleared and queried again; contained fluid identity/amount/falling/source/full flags, water-tag membership and every bundled block tag plus an absent tag are compared. Negative coordinates, chunk edges, outside-height and absent chunks are covered. Block/fluid query bindings are an immutable registry-checked shared snapshot. Actual WorldGenRegion construction, write-zone policy, POIs, block entities, postprocessing execution, lighting, block/fluid tick execution, complete feature registries and complete world generation remain outside this comparison."}
"scope":"Native FeaturePlacer and three basic block-writing features, a composed sequence of four configured fill layers, single-block replacements, scattered ore and water springs share a world proxy backed by nine actual ProtoChunks. Configured water, horizontal logs, air, out-of-height fills and ore/replacement rules test graph-to-region binding. Initial two-layer stone/dirt terrain, both pre-light heightmap groups, count/square/heightmap/layered modifier chains, repeated placements, direct and WorldgenRandom-wrapped random streams, missing-neighbor errors, rejected writes and injected partial failures are compared. Final complete raw sections, heightmap presence and packed words are compared alongside ordered feature writes, update flags, explicit height queries and subsequent random draws. Rust uses resident registry-backed chunks, lazy heightmap priming and a caller-supplied write callback; imported air/fluid facts and bundled block tags bind independently across authenticated JARs. The proxy supplies storage mutation and actual native default scheduleTick/createTick methods routed through WorldGenTickAccess into each ProtoChunk. Separate block/fluid queues, first-request deduplication, nondefault-state block identity, shared tick-order advancement on duplicates and missing-chunk errors, out-of-height requests and wrapped clock values are compared, including saved queue order and priorities. Active and inactive End podiums additionally exercise native WorldGenRegion.destroyBlock through a subclass transport overriding only block reads and writes; air short-circuit, rejected replacements and write failures retain the generation-time semantics. All block states are also written into resident chunks, queried through feature access, cleared and queried again; contained fluid identity/amount/falling/source/full flags, water-tag membership and every bundled block tag plus an absent tag are compared. Negative coordinates, chunk edges, outside-height and absent chunks are covered. Block/fluid query bindings are an immutable registry-checked shared snapshot. Actual WorldGenRegion construction, write-zone policy, POIs, block entities, postprocessing execution, lighting, block/fluid tick execution, complete feature registries and complete world generation remain outside this comparison."}
lab.write_json(report_path,report);print(f"Scoped feature-region parity passed: {report_path}")