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Diffstat (limited to 'patches/server/1001-Optimise-general-POI-access.patch')
| -rw-r--r-- | patches/server/1001-Optimise-general-POI-access.patch | 1060 |
1 files changed, 1060 insertions, 0 deletions
diff --git a/patches/server/1001-Optimise-general-POI-access.patch b/patches/server/1001-Optimise-general-POI-access.patch new file mode 100644 index 0000000000..118734c246 --- /dev/null +++ b/patches/server/1001-Optimise-general-POI-access.patch @@ -0,0 +1,1060 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: Spottedleaf <[email protected]> +Date: Sun, 31 Jan 2021 02:29:24 -0800 +Subject: [PATCH] Optimise general POI access + +There are a couple of problems with mojang's POI code. +Firstly, it's all streams. Unsurprisingly, stacking +streams on top of each other is horrible for performance +and ultimately took up half of a villager's tick! + +Secondly, sometime's the search radius is large and there are +a significant number of poi entries per chunk section. Even +removing streams at this point doesn't help much. The only solution +is to start at the search point and iterate outwards. This +type of approach shows massive gains for portals, simply because +we can avoid sync loading a large area of chunks. I also tested +a massive farm I found in JellySquid's discord, which showed +to benefit significantly simply because the farm had so many +portal blocks that searching through them all was very slow. + +Great care has been taken so that behavior remains identical to +vanilla, however I cannot account for oddball Stream API +implementations, if they even exist (streams can technically +be loose with iteration order in a sorted stream given its +source stream is not tagged with ordered, and mojang does not +tag the source stream as ordered). However in my testing on openjdk +there showed no difference, as expected. + +This patch also specifically optimises other areas of code to +use PoiAccess. For example, some villager AI and portaling code +had to be specifically modified. + +diff --git a/src/main/java/io/papermc/paper/util/PoiAccess.java b/src/main/java/io/papermc/paper/util/PoiAccess.java +new file mode 100644 +index 0000000000000000000000000000000000000000..69be1761b3b5ba7b496c1c10a4db897e6212d671 +--- /dev/null ++++ b/src/main/java/io/papermc/paper/util/PoiAccess.java +@@ -0,0 +1,804 @@ ++package io.papermc.paper.util; ++ ++import com.mojang.datafixers.util.Pair; ++import it.unimi.dsi.fastutil.doubles.Double2ObjectMap; ++import it.unimi.dsi.fastutil.doubles.Double2ObjectRBTreeMap; ++import it.unimi.dsi.fastutil.longs.LongArrayFIFOQueue; ++import it.unimi.dsi.fastutil.longs.LongOpenHashSet; ++import java.util.function.BiPredicate; ++import net.minecraft.core.BlockPos; ++import net.minecraft.core.Holder; ++import net.minecraft.util.Mth; ++import net.minecraft.world.entity.ai.village.poi.PoiManager; ++import net.minecraft.world.entity.ai.village.poi.PoiRecord; ++import net.minecraft.world.entity.ai.village.poi.PoiSection; ++import net.minecraft.world.entity.ai.village.poi.PoiType; ++import java.util.ArrayList; ++import java.util.HashSet; ++import java.util.Iterator; ++import java.util.List; ++import java.util.Map; ++import java.util.Optional; ++import java.util.Set; ++import java.util.function.Predicate; ++ ++/** ++ * Provides optimised access to POI data. All returned values will be identical to vanilla. ++ */ ++public final class PoiAccess { ++ ++ protected static double clamp(final double val, final double min, final double max) { ++ return (val < min ? min : (val > max ? max : val)); ++ } ++ ++ protected static double getSmallestDistanceSquared(final double boxMinX, final double boxMinY, final double boxMinZ, ++ final double boxMaxX, final double boxMaxY, final double boxMaxZ, ++ ++ final double circleX, final double circleY, final double circleZ) { ++ // is the circle center inside the box? ++ if (circleX >= boxMinX && circleX <= boxMaxX && circleY >= boxMinY && circleY <= boxMaxY && circleZ >= boxMinZ && circleZ <= boxMaxZ) { ++ return 0.0; ++ } ++ ++ final double boxWidthX = (boxMaxX - boxMinX) / 2.0; ++ final double boxWidthY = (boxMaxY - boxMinY) / 2.0; ++ final double boxWidthZ = (boxMaxZ - boxMinZ) / 2.0; ++ ++ final double boxCenterX = (boxMinX + boxMaxX) / 2.0; ++ final double boxCenterY = (boxMinY + boxMaxY) / 2.0; ++ final double boxCenterZ = (boxMinZ + boxMaxZ) / 2.0; ++ ++ double centerDiffX = circleX - boxCenterX; ++ double centerDiffY = circleY - boxCenterY; ++ double centerDiffZ = circleZ - boxCenterZ; ++ ++ centerDiffX = circleX - (clamp(centerDiffX, -boxWidthX, boxWidthX) + boxCenterX); ++ centerDiffY = circleY - (clamp(centerDiffY, -boxWidthY, boxWidthY) + boxCenterY); ++ centerDiffZ = circleZ - (clamp(centerDiffZ, -boxWidthZ, boxWidthZ) + boxCenterZ); ++ ++ return (centerDiffX * centerDiffX) + (centerDiffY * centerDiffY) + (centerDiffZ * centerDiffZ); ++ } ++ ++ ++ // key is: ++ // upper 32 bits: ++ // upper 16 bits: max y section ++ // lower 16 bits: min y section ++ // lower 32 bits: ++ // upper 16 bits: section ++ // lower 16 bits: radius ++ protected static long getKey(final int minSection, final int maxSection, final int section, final int radius) { ++ return ( ++ (maxSection & 0xFFFFL) << (64 - 16) ++ | (minSection & 0xFFFFL) << (64 - 32) ++ | (section & 0xFFFFL) << (64 - 48) ++ | (radius & 0xFFFFL) << (64 - 64) ++ ); ++ } ++ ++ // only includes x/z axis ++ // finds the closest poi data by distance. ++ public static BlockPos findClosestPoiDataPosition(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load) { ++ final PoiRecord ret = findClosestPoiDataRecord( ++ poiStorage, villagePlaceType, positionPredicate, sourcePosition, range, maxDistanceSquared, occupancy, load ++ ); ++ ++ return ret == null ? null : ret.getPos(); ++ } ++ ++ // only includes x/z axis ++ // finds the closest poi data by distance. ++ public static Pair<Holder<PoiType>, BlockPos> findClosestPoiDataTypeAndPosition(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load) { ++ final PoiRecord ret = findClosestPoiDataRecord( ++ poiStorage, villagePlaceType, positionPredicate, sourcePosition, range, maxDistanceSquared, occupancy, load ++ ); ++ ++ return ret == null ? null : Pair.of(ret.getPoiType(), ret.getPos()); ++ } ++ ++ // only includes x/z axis ++ // finds the closest poi data by distance. if multiple match the same distance, then they all are returned. ++ public static void findClosestPoiDataPositions(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load, ++ final Set<BlockPos> ret) { ++ final Set<BlockPos> positions = new HashSet<>(); ++ // pos predicate is last thing that runs before adding to ret. ++ final Predicate<BlockPos> newPredicate = (final BlockPos pos) -> { ++ if (positionPredicate != null && !positionPredicate.test(pos)) { ++ return false; ++ } ++ return positions.add(pos.immutable()); ++ }; ++ ++ final List<PoiRecord> toConvert = new ArrayList<>(); ++ findClosestPoiDataRecords( ++ poiStorage, villagePlaceType, newPredicate, sourcePosition, range, maxDistanceSquared, occupancy, load, toConvert ++ ); ++ ++ for (final PoiRecord record : toConvert) { ++ ret.add(record.getPos()); ++ } ++ } ++ ++ // only includes x/z axis ++ // finds the closest poi data by distance. ++ public static PoiRecord findClosestPoiDataRecord(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load) { ++ final List<PoiRecord> ret = new ArrayList<>(); ++ findClosestPoiDataRecords( ++ poiStorage, villagePlaceType, positionPredicate, sourcePosition, range, maxDistanceSquared, occupancy, load, ret ++ ); ++ return ret.isEmpty() ? null : ret.get(0); ++ } ++ ++ // only includes x/z axis ++ // finds the closest poi data by distance. ++ public static PoiRecord findClosestPoiDataRecord(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final BiPredicate<Holder<PoiType>, BlockPos> predicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load) { ++ final List<PoiRecord> ret = new ArrayList<>(); ++ findClosestPoiDataRecords( ++ poiStorage, villagePlaceType, predicate, sourcePosition, range, maxDistanceSquared, occupancy, load, ret ++ ); ++ return ret.isEmpty() ? null : ret.get(0); ++ } ++ ++ // only includes x/z axis ++ // finds the closest poi data by distance. if multiple match the same distance, then they all are returned. ++ public static void findClosestPoiDataRecords(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load, ++ final List<PoiRecord> ret) { ++ final BiPredicate<Holder<PoiType>, BlockPos> predicate = positionPredicate != null ? (type, pos) -> positionPredicate.test(pos) : null; ++ findClosestPoiDataRecords(poiStorage, villagePlaceType, predicate, sourcePosition, range, maxDistanceSquared, occupancy, load, ret); ++ } ++ ++ public static void findClosestPoiDataRecords(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final BiPredicate<Holder<PoiType>, BlockPos> predicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load, ++ final List<PoiRecord> ret) { ++ final Predicate<? super PoiRecord> occupancyFilter = occupancy.getTest(); ++ ++ final List<PoiRecord> closestRecords = new ArrayList<>(); ++ double closestDistanceSquared = maxDistanceSquared; ++ ++ final int lowerX = Mth.floor(sourcePosition.getX() - range) >> 4; ++ final int lowerY = WorldUtil.getMinSection(poiStorage.world); ++ final int lowerZ = Mth.floor(sourcePosition.getZ() - range) >> 4; ++ final int upperX = Mth.floor(sourcePosition.getX() + range) >> 4; ++ final int upperY = WorldUtil.getMaxSection(poiStorage.world); ++ final int upperZ = Mth.floor(sourcePosition.getZ() + range) >> 4; ++ ++ final int centerX = sourcePosition.getX() >> 4; ++ final int centerY = Mth.clamp(sourcePosition.getY() >> 4, lowerY, upperY); ++ final int centerZ = sourcePosition.getZ() >> 4; ++ final long centerKey = CoordinateUtils.getChunkSectionKey(centerX, centerY, centerZ); ++ ++ final LongArrayFIFOQueue queue = new LongArrayFIFOQueue(); ++ final LongOpenHashSet seen = new LongOpenHashSet(); ++ seen.add(centerKey); ++ queue.enqueue(centerKey); ++ ++ while (!queue.isEmpty()) { ++ final long key = queue.dequeueLong(); ++ final int sectionX = CoordinateUtils.getChunkSectionX(key); ++ final int sectionY = CoordinateUtils.getChunkSectionY(key); ++ final int sectionZ = CoordinateUtils.getChunkSectionZ(key); ++ ++ if (sectionX < lowerX || sectionX > upperX || sectionY < lowerY || sectionY > upperY || sectionZ < lowerZ || sectionZ > upperZ) { ++ // out of bound chunk ++ continue; ++ } ++ ++ final double sectionDistanceSquared = getSmallestDistanceSquared( ++ (sectionX << 4) + 0.5, ++ (sectionY << 4) + 0.5, ++ (sectionZ << 4) + 0.5, ++ (sectionX << 4) + 15.5, ++ (sectionY << 4) + 15.5, ++ (sectionZ << 4) + 15.5, ++ (double)sourcePosition.getX(), (double)sourcePosition.getY(), (double)sourcePosition.getZ() ++ ); ++ if (sectionDistanceSquared > closestDistanceSquared) { ++ continue; ++ } ++ ++ // queue all neighbours ++ for (int dz = -1; dz <= 1; ++dz) { ++ for (int dx = -1; dx <= 1; ++dx) { ++ for (int dy = -1; dy <= 1; ++dy) { ++ // -1 and 1 have the 1st bit set. so just add up the first bits, and it will tell us how many ++ // values are set. we only care about cardinal neighbours, so, we only care if one value is set ++ if ((dx & 1) + (dy & 1) + (dz & 1) != 1) { ++ continue; ++ } ++ ++ final int neighbourX = sectionX + dx; ++ final int neighbourY = sectionY + dy; ++ final int neighbourZ = sectionZ + dz; ++ ++ final long neighbourKey = CoordinateUtils.getChunkSectionKey(neighbourX, neighbourY, neighbourZ); ++ if (seen.add(neighbourKey)) { ++ queue.enqueue(neighbourKey); ++ } ++ } ++ } ++ } ++ ++ final Optional<PoiSection> poiSectionOptional = load ? poiStorage.getOrLoad(key) : poiStorage.get(key); ++ ++ if (poiSectionOptional == null || !poiSectionOptional.isPresent()) { ++ continue; ++ } ++ ++ final PoiSection poiSection = poiSectionOptional.get(); ++ ++ final Map<Holder<PoiType>, Set<PoiRecord>> sectionData = poiSection.getData(); ++ if (sectionData.isEmpty()) { ++ continue; ++ } ++ ++ // now we search the section data ++ for (final Map.Entry<Holder<PoiType>, Set<PoiRecord>> entry : sectionData.entrySet()) { ++ if (!villagePlaceType.test(entry.getKey())) { ++ // filter out by poi type ++ continue; ++ } ++ ++ // now we can look at the poi data ++ for (final PoiRecord poiData : entry.getValue()) { ++ if (!occupancyFilter.test(poiData)) { ++ // filter by occupancy ++ continue; ++ } ++ ++ final BlockPos poiPosition = poiData.getPos(); ++ ++ if (Math.abs(poiPosition.getX() - sourcePosition.getX()) > range ++ || Math.abs(poiPosition.getZ() - sourcePosition.getZ()) > range) { ++ // out of range for square radius ++ continue; ++ } ++ ++ // it's important that it's poiPosition.distSqr(source) : the value actually is different IF the values are swapped! ++ final double dataRange = poiPosition.distSqr(sourcePosition); ++ ++ if (dataRange > closestDistanceSquared) { ++ // out of range for distance check ++ continue; ++ } ++ ++ if (predicate != null && !predicate.test(poiData.getPoiType(), poiPosition)) { ++ // filter by position ++ continue; ++ } ++ ++ if (dataRange < closestDistanceSquared) { ++ closestRecords.clear(); ++ closestDistanceSquared = dataRange; ++ } ++ closestRecords.add(poiData); ++ } ++ } ++ } ++ ++ // uh oh! we might have multiple records that match the distance sorting! ++ // we need to re-order our results by the way vanilla would have iterated over them. ++ closestRecords.sort((record1, record2) -> { ++ // vanilla iterates the same way we do for data inside sections, so we know the ordering inside a section ++ // is fine and should be preserved (this sort is stable so we're good there) ++ // but they iterate sections by x then by z (like the following) ++ // for (int x = -dx; x <= dx; ++x) ++ // for (int z = -dz; z <= dz; ++z) ++ // .... ++ // so we need to reorder such that records with lower chunk z, then lower chunk x come first ++ final BlockPos pos1 = record1.getPos(); ++ final BlockPos pos2 = record2.getPos(); ++ ++ final int cx1 = pos1.getX() >> 4; ++ final int cz1 = pos1.getZ() >> 4; ++ ++ final int cx2 = pos2.getX() >> 4; ++ final int cz2 = pos2.getZ() >> 4; ++ ++ if (cz2 != cz1) { ++ // want smaller z ++ return Integer.compare(cz1, cz2); ++ } ++ ++ if (cx2 != cx1) { ++ // want smaller x ++ return Integer.compare(cx1, cx2); ++ } ++ ++ // same chunk ++ // once vanilla has the chunk, it will iterate from all of the chunk sections starting from smaller y ++ // so now we just compare section y, wanting smaller y ++ ++ return Integer.compare(pos1.getY() >> 4, pos2.getY() >> 4); ++ }); ++ ++ // now we match perfectly what vanilla would have outputted, without having to search the whole radius (hopefully). ++ ret.addAll(closestRecords); ++ } ++ ++ // finds the closest poi entry pos. ++ public static BlockPos findNearestPoiPosition(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load) { ++ final PoiRecord ret = findNearestPoiRecord( ++ poiStorage, villagePlaceType, positionPredicate, sourcePosition, range, maxDistanceSquared, occupancy, load ++ ); ++ return ret == null ? null : ret.getPos(); ++ } ++ ++ // finds the closest `max` poi entry positions. ++ public static void findNearestPoiPositions(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load, ++ final int max, ++ final List<Pair<Holder<PoiType>, BlockPos>> ret) { ++ final Set<BlockPos> positions = new HashSet<>(); ++ // pos predicate is last thing that runs before adding to ret. ++ final Predicate<BlockPos> newPredicate = (final BlockPos pos) -> { ++ if (positionPredicate != null && !positionPredicate.test(pos)) { ++ return false; ++ } ++ return positions.add(pos.immutable()); ++ }; ++ ++ final List<PoiRecord> toConvert = new ArrayList<>(); ++ findNearestPoiRecords( ++ poiStorage, villagePlaceType, newPredicate, sourcePosition, range, maxDistanceSquared, occupancy, load, max, toConvert ++ ); ++ ++ for (final PoiRecord record : toConvert) { ++ ret.add(Pair.of(record.getPoiType(), record.getPos())); ++ } ++ } ++ ++ // finds the closest poi entry. ++ public static PoiRecord findNearestPoiRecord(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load) { ++ final List<PoiRecord> ret = new ArrayList<>(); ++ findNearestPoiRecords( ++ poiStorage, villagePlaceType, positionPredicate, sourcePosition, range, maxDistanceSquared, occupancy, load, ++ 1, ret ++ ); ++ return ret.isEmpty() ? null : ret.get(0); ++ } ++ ++ // finds the closest `max` poi entries. ++ public static void findNearestPoiRecords(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ // position predicate must not modify chunk POI ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final double maxDistanceSquared, ++ final PoiManager.Occupancy occupancy, ++ final boolean load, ++ final int max, ++ final List<PoiRecord> ret) { ++ final Predicate<? super PoiRecord> occupancyFilter = occupancy.getTest(); ++ ++ final Double2ObjectRBTreeMap<List<PoiRecord>> closestRecords = new Double2ObjectRBTreeMap<>(); ++ int totalRecords = 0; ++ double furthestDistanceSquared = maxDistanceSquared; ++ ++ final int lowerX = Mth.floor(sourcePosition.getX() - range) >> 4; ++ final int lowerY = WorldUtil.getMinSection(poiStorage.world); ++ final int lowerZ = Mth.floor(sourcePosition.getZ() - range) >> 4; ++ final int upperX = Mth.floor(sourcePosition.getX() + range) >> 4; ++ final int upperY = WorldUtil.getMaxSection(poiStorage.world); ++ final int upperZ = Mth.floor(sourcePosition.getZ() + range) >> 4; ++ ++ final int centerX = sourcePosition.getX() >> 4; ++ final int centerY = Mth.clamp(sourcePosition.getY() >> 4, lowerY, upperY); ++ final int centerZ = sourcePosition.getZ() >> 4; ++ final long centerKey = CoordinateUtils.getChunkSectionKey(centerX, centerY, centerZ); ++ ++ final LongArrayFIFOQueue queue = new LongArrayFIFOQueue(); ++ final LongOpenHashSet seen = new LongOpenHashSet(); ++ seen.add(centerKey); ++ queue.enqueue(centerKey); ++ ++ while (!queue.isEmpty()) { ++ final long key = queue.dequeueLong(); ++ final int sectionX = CoordinateUtils.getChunkSectionX(key); ++ final int sectionY = CoordinateUtils.getChunkSectionY(key); ++ final int sectionZ = CoordinateUtils.getChunkSectionZ(key); ++ ++ if (sectionX < lowerX || sectionX > upperX || sectionY < lowerY || sectionY > upperY || sectionZ < lowerZ || sectionZ > upperZ) { ++ // out of bound chunk ++ continue; ++ } ++ ++ final double sectionDistanceSquared = getSmallestDistanceSquared( ++ (sectionX << 4) + 0.5, ++ (sectionY << 4) + 0.5, ++ (sectionZ << 4) + 0.5, ++ (sectionX << 4) + 15.5, ++ (sectionY << 4) + 15.5, ++ (sectionZ << 4) + 15.5, ++ (double) sourcePosition.getX(), (double) sourcePosition.getY(), (double) sourcePosition.getZ() ++ ); ++ ++ if (sectionDistanceSquared > (totalRecords >= max ? furthestDistanceSquared : maxDistanceSquared)) { ++ continue; ++ } ++ ++ // queue all neighbours ++ for (int dz = -1; dz <= 1; ++dz) { ++ for (int dx = -1; dx <= 1; ++dx) { ++ for (int dy = -1; dy <= 1; ++dy) { ++ // -1 and 1 have the 1st bit set. so just add up the first bits, and it will tell us how many ++ // values are set. we only care about cardinal neighbours, so, we only care if one value is set ++ if ((dx & 1) + (dy & 1) + (dz & 1) != 1) { ++ continue; ++ } ++ ++ final int neighbourX = sectionX + dx; ++ final int neighbourY = sectionY + dy; ++ final int neighbourZ = sectionZ + dz; ++ ++ final long neighbourKey = CoordinateUtils.getChunkSectionKey(neighbourX, neighbourY, neighbourZ); ++ if (seen.add(neighbourKey)) { ++ queue.enqueue(neighbourKey); ++ } ++ } ++ } ++ } ++ ++ final Optional<PoiSection> poiSectionOptional = load ? poiStorage.getOrLoad(key) : poiStorage.get(key); ++ ++ if (poiSectionOptional == null || !poiSectionOptional.isPresent()) { ++ continue; ++ } ++ ++ final PoiSection poiSection = poiSectionOptional.get(); ++ ++ final Map<Holder<PoiType>, Set<PoiRecord>> sectionData = poiSection.getData(); ++ if (sectionData.isEmpty()) { ++ continue; ++ } ++ ++ // now we search the section data ++ for (final Map.Entry<Holder<PoiType>, Set<PoiRecord>> entry : sectionData.entrySet()) { ++ if (!villagePlaceType.test(entry.getKey())) { ++ // filter out by poi type ++ continue; ++ } ++ ++ // now we can look at the poi data ++ for (final PoiRecord poiData : entry.getValue()) { ++ if (!occupancyFilter.test(poiData)) { ++ // filter by occupancy ++ continue; ++ } ++ ++ final BlockPos poiPosition = poiData.getPos(); ++ ++ if (Math.abs(poiPosition.getX() - sourcePosition.getX()) > range ++ || Math.abs(poiPosition.getZ() - sourcePosition.getZ()) > range) { ++ // out of range for square radius ++ continue; ++ } ++ ++ // it's important that it's poiPosition.distSqr(source) : the value actually is different IF the values are swapped! ++ final double dataRange = poiPosition.distSqr(sourcePosition); ++ ++ if (dataRange > maxDistanceSquared) { ++ // out of range for distance check ++ continue; ++ } ++ ++ if (dataRange > furthestDistanceSquared && totalRecords >= max) { ++ // out of range for distance check ++ continue; ++ } ++ ++ if (positionPredicate != null && !positionPredicate.test(poiPosition)) { ++ // filter by position ++ continue; ++ } ++ ++ if (dataRange > furthestDistanceSquared) { ++ // we know totalRecords < max, so this entry is now our furthest ++ furthestDistanceSquared = dataRange; ++ } ++ ++ closestRecords.computeIfAbsent(dataRange, (final double unused) -> { ++ return new ArrayList<>(); ++ }).add(poiData); ++ ++ if (++totalRecords >= max) { ++ if (closestRecords.size() >= 2) { ++ int entriesInClosest = 0; ++ final Iterator<Double2ObjectMap.Entry<List<PoiRecord>>> iterator = closestRecords.double2ObjectEntrySet().iterator(); ++ double nextFurthestDistanceSquared = 0.0; ++ ++ for (int i = 0, len = closestRecords.size() - 1; i < len; ++i) { ++ final Double2ObjectMap.Entry<List<PoiRecord>> recordEntry = iterator.next(); ++ entriesInClosest += recordEntry.getValue().size(); ++ nextFurthestDistanceSquared = recordEntry.getDoubleKey(); ++ } ++ ++ if (entriesInClosest >= max) { ++ // the last set of entries at range wont even be considered for sure... nuke em ++ final Double2ObjectMap.Entry<List<PoiRecord>> recordEntry = iterator.next(); ++ totalRecords -= recordEntry.getValue().size(); ++ iterator.remove(); ++ ++ furthestDistanceSquared = nextFurthestDistanceSquared; ++ } ++ } ++ } ++ } ++ } ++ } ++ ++ final List<PoiRecord> closestRecordsUnsorted = new ArrayList<>(); ++ ++ // we're done here, so now just flatten the map and sort it. ++ ++ for (final List<PoiRecord> records : closestRecords.values()) { ++ closestRecordsUnsorted.addAll(records); ++ } ++ ++ // uh oh! we might have multiple records that match the distance sorting! ++ // we need to re-order our results by the way vanilla would have iterated over them. ++ closestRecordsUnsorted.sort((record1, record2) -> { ++ // vanilla iterates the same way we do for data inside sections, so we know the ordering inside a section ++ // is fine and should be preserved (this sort is stable so we're good there) ++ // but they iterate sections by x then by z (like the following) ++ // for (int x = -dx; x <= dx; ++x) ++ // for (int z = -dz; z <= dz; ++z) ++ // .... ++ // so we need to reorder such that records with lower chunk z, then lower chunk x come first ++ final BlockPos pos1 = record1.getPos(); ++ final BlockPos pos2 = record2.getPos(); ++ ++ final int cx1 = pos1.getX() >> 4; ++ final int cz1 = pos1.getZ() >> 4; ++ ++ final int cx2 = pos2.getX() >> 4; ++ final int cz2 = pos2.getZ() >> 4; ++ ++ if (cz2 != cz1) { ++ // want smaller z ++ return Integer.compare(cz1, cz2); ++ } ++ ++ if (cx2 != cx1) { ++ // want smaller x ++ return Integer.compare(cx1, cx2); ++ } ++ ++ // same chunk ++ // once vanilla has the chunk, it will iterate from all of the chunk sections starting from smaller y ++ // so now we just compare section y, wanting smaller section y ++ ++ return Integer.compare(pos1.getY() >> 4, pos2.getY() >> 4); ++ }); ++ ++ // trim out any entries exceeding our maximum ++ for (int i = closestRecordsUnsorted.size() - 1; i >= max; --i) { ++ closestRecordsUnsorted.remove(i); ++ } ++ ++ // now we match perfectly what vanilla would have outputted, without having to search the whole radius (hopefully). ++ ret.addAll(closestRecordsUnsorted); ++ } ++ ++ public static BlockPos findAnyPoiPosition(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final PoiManager.Occupancy occupancy, ++ final boolean load) { ++ final PoiRecord ret = findAnyPoiRecord( ++ poiStorage, villagePlaceType, positionPredicate, sourcePosition, range, occupancy, load ++ ); ++ ++ return ret == null ? null : ret.getPos(); ++ } ++ ++ public static void findAnyPoiPositions(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final PoiManager.Occupancy occupancy, ++ final boolean load, ++ final int max, ++ final List<Pair<Holder<PoiType>, BlockPos>> ret) { ++ final Set<BlockPos> positions = new HashSet<>(); ++ // pos predicate is last thing that runs before adding to ret. ++ final Predicate<BlockPos> newPredicate = (final BlockPos pos) -> { ++ if (positionPredicate != null && !positionPredicate.test(pos)) { ++ return false; ++ } ++ return positions.add(pos.immutable()); ++ }; ++ ++ final List<PoiRecord> toConvert = new ArrayList<>(); ++ findAnyPoiRecords( ++ poiStorage, villagePlaceType, newPredicate, sourcePosition, range, occupancy, load, max, toConvert ++ ); ++ ++ for (final PoiRecord record : toConvert) { ++ ret.add(Pair.of(record.getPoiType(), record.getPos())); ++ } ++ } ++ ++ public static PoiRecord findAnyPoiRecord(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final PoiManager.Occupancy occupancy, ++ final boolean load) { ++ final List<PoiRecord> ret = new ArrayList<>(); ++ findAnyPoiRecords(poiStorage, villagePlaceType, positionPredicate, sourcePosition, range, occupancy, load, 1, ret); ++ return ret.isEmpty() ? null : ret.get(0); ++ } ++ ++ public static void findAnyPoiRecords(final PoiManager poiStorage, ++ final Predicate<Holder<PoiType>> villagePlaceType, ++ final Predicate<BlockPos> positionPredicate, ++ final BlockPos sourcePosition, ++ final int range, // distance on x y z axis ++ final PoiManager.Occupancy occupancy, ++ final boolean load, ++ final int max, ++ final List<PoiRecord> ret) { ++ // the biggest issue with the original mojang implementation is that they chain so many streams together ++ // the amount of streams chained just rolls performance, even if nothing is iterated over ++ final Predicate<? super PoiRecord> occupancyFilter = occupancy.getTest(); ++ final double rangeSquared = range * range; ++ ++ int added = 0; ++ ++ // First up, we need to iterate the chunks ++ // all the values here are in chunk sections ++ final int lowerX = Mth.floor(sourcePosition.getX() - range) >> 4; ++ final int lowerY = Math.max(WorldUtil.getMinSection(poiStorage.world), Mth.floor(sourcePosition.getY() - range) >> 4); ++ final int lowerZ = Mth.floor(sourcePosition.getZ() - range) >> 4; ++ final int upperX = Mth.floor(sourcePosition.getX() + range) >> 4; ++ final int upperY = Math.min(WorldUtil.getMaxSection(poiStorage.world), Mth.floor(sourcePosition.getY() + range) >> 4); ++ final int upperZ = Mth.floor(sourcePosition.getZ() + range) >> 4; ++ ++ // Vanilla iterates by x until max is reached then increases z ++ // vanilla also searches by increasing Y section value ++ for (int currZ = lowerZ; currZ <= upperZ; ++currZ) { ++ for (int currX = lowerX; currX <= upperX; ++currX) { ++ for (int currY = lowerY; currY <= upperY; ++currY) { // vanilla searches the entire chunk because they're actually stupid. just search the sections we need ++ final Optional<PoiSection> poiSectionOptional = load ? poiStorage.getOrLoad(CoordinateUtils.getChunkSectionKey(currX, currY, currZ)) : ++ poiStorage.get(CoordinateUtils.getChunkSectionKey(currX, currY, currZ)); ++ final PoiSection poiSection = poiSectionOptional == null ? null : poiSectionOptional.orElse(null); ++ if (poiSection == null) { ++ continue; ++ } ++ ++ final Map<Holder<PoiType>, Set<PoiRecord>> sectionData = poiSection.getData(); ++ if (sectionData.isEmpty()) { ++ continue; ++ } ++ ++ // now we search the section data ++ for (final Map.Entry<Holder<PoiType>, Set<PoiRecord>> entry : sectionData.entrySet()) { ++ if (!villagePlaceType.test(entry.getKey())) { ++ // filter out by poi type ++ continue; ++ } ++ ++ // now we can look at the poi data ++ for (final PoiRecord poiData : entry.getValue()) { ++ if (!occupancyFilter.test(poiData)) { ++ // filter by occupancy ++ continue; ++ } ++ ++ final BlockPos poiPosition = poiData.getPos(); ++ ++ if (Math.abs(poiPosition.getX() - sourcePosition.getX()) > range ++ || Math.abs(poiPosition.getZ() - sourcePosition.getZ()) > range) { ++ // out of range for square radius ++ continue; ++ } ++ ++ if (poiPosition.distSqr(sourcePosition) > rangeSquared) { ++ // out of range for distance check ++ continue; ++ } ++ ++ if (positionPredicate != null && !positionPredicate.test(poiPosition)) { ++ // filter by position ++ continue; ++ } ++ ++ // found one! ++ ret.add(poiData); ++ if (++added >= max) { ++ return; ++ } ++ } ++ } ++ } ++ } ++ } ++ } ++ ++ private PoiAccess() { ++ throw new RuntimeException(); ++ } ++} +diff --git a/src/main/java/net/minecraft/world/entity/ai/behavior/AcquirePoi.java b/src/main/java/net/minecraft/world/entity/ai/behavior/AcquirePoi.java +index e8aa27547e3fa1a42720889c7038d4fb0273e7b5..e1b6fe9ecda25f86431baf414f1bfd3a26a8b2bd 100644 +--- a/src/main/java/net/minecraft/world/entity/ai/behavior/AcquirePoi.java ++++ b/src/main/java/net/minecraft/world/entity/ai/behavior/AcquirePoi.java +@@ -71,11 +71,11 @@ public class AcquirePoi { + return true; + } + }; +- Set<Pair<Holder<PoiType>, BlockPos>> set = poiManager.findAllClosestFirstWithType( +- poiPredicate, predicate2, entity.blockPosition(), 48, PoiManager.Occupancy.HAS_SPACE +- ) +- .limit(5L) +- .collect(Collectors.toSet()); ++ // Paper start - optimise POI access ++ java.util.List<Pair<Holder<PoiType>, BlockPos>> poiposes = new java.util.ArrayList<>(); ++ io.papermc.paper.util.PoiAccess.findNearestPoiPositions(poiManager, poiPredicate, predicate2, entity.blockPosition(), 48, 48*48, PoiManager.Occupancy.HAS_SPACE, false, 5, poiposes); ++ Set<Pair<Holder<PoiType>, BlockPos>> set = new java.util.HashSet<>(poiposes); ++ // Paper end - optimise POI access + Path path = findPathToPois(entity, set); + if (path != null && path.canReach()) { + BlockPos blockPos = path.getTarget(); +diff --git a/src/main/java/net/minecraft/world/entity/ai/sensing/NearestBedSensor.java b/src/main/java/net/minecraft/world/entity/ai/sensing/NearestBedSensor.java +index d5a549f08b98c80a5cf0eef02cb8a389c32dfecb..92731b6b593289e9f583c9b705b219e81fcd8e73 100644 +--- a/src/main/java/net/minecraft/world/entity/ai/sensing/NearestBedSensor.java ++++ b/src/main/java/net/minecraft/world/entity/ai/sensing/NearestBedSensor.java +@@ -53,11 +53,12 @@ public class NearestBedSensor extends Sensor<Mob> { + return true; + } + }; +- Set<Pair<Holder<PoiType>, BlockPos>> set = poiManager.findAllWithType( +- holder -> holder.is(PoiTypes.HOME), predicate, entity.blockPosition(), 48, PoiManager.Occupancy.ANY +- ) +- .collect(Collectors.toSet()); +- Path path = AcquirePoi.findPathToPois(entity, set); ++ // Paper start - optimise POI access ++ java.util.List<Pair<Holder<PoiType>, BlockPos>> poiposes = new java.util.ArrayList<>(); ++ // don't ask me why it's unbounded. ask mojang. ++ io.papermc.paper.util.PoiAccess.findAnyPoiPositions(poiManager, type -> type.is(PoiTypes.HOME), predicate, entity.blockPosition(), 48, PoiManager.Occupancy.ANY, false, Integer.MAX_VALUE, poiposes); ++ Path path = AcquirePoi.findPathToPois(entity, new java.util.HashSet<>(poiposes)); ++ // Paper end - optimise POI access + if (path != null && path.canReach()) { + BlockPos blockPos = path.getTarget(); + Optional<Holder<PoiType>> optional = poiManager.getType(blockPos); +diff --git a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java +index 7b52b0507cbda76aee1db954641f397bef51f94d..c6f193339fdcbcc938d4eafdcad0b112cf1698d5 100644 +--- a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java ++++ b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java +@@ -138,36 +138,45 @@ public class PoiManager extends SectionStorage<PoiSection> { + public Optional<BlockPos> find( + Predicate<Holder<PoiType>> typePredicate, Predicate<BlockPos> posPredicate, BlockPos pos, int radius, PoiManager.Occupancy occupationStatus + ) { +- return this.findAll(typePredicate, posPredicate, pos, radius, occupationStatus).findFirst(); ++ // Paper start - re-route to faster logic ++ BlockPos ret = io.papermc.paper.util.PoiAccess.findAnyPoiPosition(this, typePredicate, posPredicate, pos, radius, occupationStatus, false); ++ return Optional.ofNullable(ret); ++ // Paper end + } + + public Optional<BlockPos> findClosest(Predicate<Holder<PoiType>> typePredicate, BlockPos pos, int radius, PoiManager.Occupancy occupationStatus) { +- return this.getInRange(typePredicate, pos, radius, occupationStatus) +- .map(PoiRecord::getPos) +- .min(Comparator.comparingDouble(blockPos2 -> blockPos2.distSqr(pos))); ++ // Paper start - re-route to faster logic ++ BlockPos ret = io.papermc.paper.util.PoiAccess.findClosestPoiDataPosition(this, typePredicate, null, pos, radius, radius * radius, occupationStatus, false); ++ return Optional.ofNullable(ret); ++ // Paper end - re-route to faster logic + } + + public Optional<Pair<Holder<PoiType>, BlockPos>> findClosestWithType( + Predicate<Holder<PoiType>> typePredicate, BlockPos pos, int radius, PoiManager.Occupancy occupationStatus + ) { +- return this.getInRange(typePredicate, pos, radius, occupationStatus) +- .min(Comparator.comparingDouble(poi -> poi.getPos().distSqr(pos))) +- .map(poi -> Pair.of(poi.getPoiType(), poi.getPos())); ++ // Paper start - re-route to faster logic ++ return Optional.ofNullable(io.papermc.paper.util.PoiAccess.findClosestPoiDataTypeAndPosition( ++ this, typePredicate, null, pos, radius, radius * radius, occupationStatus, false ++ )); ++ // Paper end - re-route to faster logic + } + + public Optional<BlockPos> findClosest( + Predicate<Holder<PoiType>> typePredicate, Predicate<BlockPos> posPredicate, BlockPos pos, int radius, PoiManager.Occupancy occupationStatus + ) { +- return this.getInRange(typePredicate, pos, radius, occupationStatus) +- .map(PoiRecord::getPos) +- .filter(posPredicate) +- .min(Comparator.comparingDouble(blockPos2 -> blockPos2.distSqr(pos))); ++ // Paper start - re-route to faster logic ++ BlockPos ret = io.papermc.paper.util.PoiAccess.findClosestPoiDataPosition(this, typePredicate, posPredicate, pos, radius, radius * radius, occupationStatus, false); ++ return Optional.ofNullable(ret); ++ // Paper end - re-route to faster logic + } + + public Optional<BlockPos> take(Predicate<Holder<PoiType>> typePredicate, BiPredicate<Holder<PoiType>, BlockPos> biPredicate, BlockPos pos, int radius) { +- return this.getInRange(typePredicate, pos, radius, PoiManager.Occupancy.HAS_SPACE) +- .filter(poi -> biPredicate.test(poi.getPoiType(), poi.getPos())) +- .findFirst() ++ // Paper start - re-route to faster logic ++ final @javax.annotation.Nullable PoiRecord closest = io.papermc.paper.util.PoiAccess.findClosestPoiDataRecord( ++ this, typePredicate, biPredicate, pos, radius, radius * radius, Occupancy.HAS_SPACE, false ++ ); ++ return Optional.ofNullable(closest) ++ // Paper end - re-route to faster logic + .map(poi -> { + poi.acquireTicket(); + return poi.getPos(); +@@ -182,8 +191,21 @@ public class PoiManager extends SectionStorage<PoiSection> { + int radius, + RandomSource random + ) { +- List<PoiRecord> list = Util.toShuffledList(this.getInRange(typePredicate, pos, radius, occupationStatus), random); +- return list.stream().filter(poi -> positionPredicate.test(poi.getPos())).findFirst().map(PoiRecord::getPos); ++ // Paper start - re-route to faster logic ++ List<PoiRecord> list = new java.util.ArrayList<>(); ++ io.papermc.paper.util.PoiAccess.findAnyPoiRecords( ++ this, typePredicate, positionPredicate, pos, radius, occupationStatus, false, Integer.MAX_VALUE, list ++ ); ++ ++ // the old method shuffled the list and then tried to find the first element in it that ++ // matched positionPredicate, however we moved positionPredicate into the poi search. This means we can avoid a ++ // shuffle entirely, and just pick a random element from list ++ if (list.isEmpty()) { ++ return Optional.empty(); ++ } ++ ++ return Optional.of(list.get(random.nextInt(list.size())).getPos()); ++ // Paper end - re-route to faster logic + } + + public boolean release(BlockPos pos) { +diff --git a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java +index 5b7deae326228e482b218aeebd857a59b7434eaf..4ee7d75c56d9f9ff3607276857dde84410ba3f2a 100644 +--- a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java ++++ b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java +@@ -26,7 +26,7 @@ import org.slf4j.Logger; + public class PoiSection { + private static final Logger LOGGER = LogUtils.getLogger(); + private final Short2ObjectMap<PoiRecord> records = new Short2ObjectOpenHashMap<>(); +- private final Map<Holder<PoiType>, Set<PoiRecord>> byType = Maps.newHashMap(); ++ private final Map<Holder<PoiType>, Set<PoiRecord>> byType = Maps.newHashMap(); public final Map<Holder<PoiType>, Set<PoiRecord>> getData() { return this.byType; } // Paper - public accessor + private final Runnable setDirty; + private boolean isValid; + public final Optional<PoiSection> noAllocateOptional = Optional.of(this); // Paper - rewrite chunk system +diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java +index 883fbe5c81e3be27007a1a0489f80ba1863e5a04..a4a919d8373f1535e336de7e648d41a07efb1cba 100644 +--- a/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java ++++ b/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java +@@ -74,11 +74,11 @@ public class SectionStorage<R> extends RegionFileStorage implements AutoCloseabl + } + + @Nullable +- protected Optional<R> get(long pos) { ++ public Optional<R> get(long pos) { // Paper - public + return this.storage.get(pos); + } + +- protected Optional<R> getOrLoad(long pos) { ++ public Optional<R> getOrLoad(long pos) { // Paper - public + if (this.outsideStoredRange(pos)) { + return Optional.empty(); + } else { +diff --git a/src/main/java/net/minecraft/world/level/portal/PortalForcer.java b/src/main/java/net/minecraft/world/level/portal/PortalForcer.java +index a61959700d5e00739a79eaa617ac383160335f26..2407d93c11b806701fc7d192f39d535128281e80 100644 +--- a/src/main/java/net/minecraft/world/level/portal/PortalForcer.java ++++ b/src/main/java/net/minecraft/world/level/portal/PortalForcer.java +@@ -51,18 +51,39 @@ public class PortalForcer { + // int i = flag ? 16 : 128; + // CraftBukkit end + +- villageplace.ensureLoadedAndValid(this.level, blockposition, i); +- Optional<PoiRecord> optional = villageplace.getInSquare((holder) -> { +- return holder.is(PoiTypes.NETHER_PORTAL); +- }, blockposition, i, PoiManager.Occupancy.ANY).filter((villageplacerecord) -> { +- return worldborder.isWithinBounds(villageplacerecord.getPos()) && !(this.level.getTypeKey() == net.minecraft.world.level.dimension.LevelStem.NETHER && this.level.paperConfig().environment.netherCeilingVoidDamageHeight.test(v -> villageplacerecord.getPos().getY() >= v)); // Paper - Configurable nether ceiling damage +- }).sorted(Comparator.comparingDouble((PoiRecord villageplacerecord) -> { // CraftBukkit - decompile error +- return villageplacerecord.getPos().distSqr(blockposition); +- }).thenComparingInt((villageplacerecord) -> { +- return villageplacerecord.getPos().getY(); +- })).filter((villageplacerecord) -> { +- return this.level.getBlockState(villageplacerecord.getPos()).hasProperty(BlockStateProperties.HORIZONTAL_AXIS); +- }).findFirst(); ++ // Paper start - optimise portals ++ Optional<PoiRecord> optional; ++ java.util.List<PoiRecord> records = new java.util.ArrayList<>(); ++ io.papermc.paper.util.PoiAccess.findClosestPoiDataRecords( ++ villageplace, ++ type -> type.is(PoiTypes.NETHER_PORTAL), ++ (BlockPos pos) -> { ++ net.minecraft.world.level.chunk.ChunkAccess lowest = this.level.getChunk(pos.getX() >> 4, pos.getZ() >> 4, net.minecraft.world.level.chunk.status.ChunkStatus.EMPTY); ++ if (!lowest.getStatus().isOrAfter(net.minecraft.world.level.chunk.status.ChunkStatus.FULL) ++ && (lowest.getBelowZeroRetrogen() == null || !lowest.getBelowZeroRetrogen().targetStatus().isOrAfter(net.minecraft.world.level.chunk.status.ChunkStatus.SPAWN))) { ++ // why would we generate the chunk? ++ return false; ++ } ++ if (!worldborder.isWithinBounds(pos) || (this.level.getTypeKey() == net.minecraft.world.level.dimension.LevelStem.NETHER && this.level.paperConfig().environment.netherCeilingVoidDamageHeight.test(v -> pos.getY() >= v))) { // Paper - Configurable nether ceiling damage ++ return false; ++ } ++ return lowest.getBlockState(pos).hasProperty(BlockStateProperties.HORIZONTAL_AXIS); ++ }, ++ blockposition, i, Double.MAX_VALUE, PoiManager.Occupancy.ANY, true, records ++ ); ++ ++ // this gets us most of the way there, but we bias towards lower y values. ++ PoiRecord lowestYRecord = null; ++ for (PoiRecord record : records) { ++ if (lowestYRecord == null) { ++ lowestYRecord = record; ++ } else if (lowestYRecord.getPos().getY() > record.getPos().getY()) { ++ lowestYRecord = record; ++ } ++ } ++ // now we're done ++ optional = Optional.ofNullable(lowestYRecord); ++ // Paper end - optimise portals + + return optional.map((villageplacerecord) -> { + BlockPos blockposition1 = villageplacerecord.getPos(); |