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c5a10665b8
Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
90 lines
5.1 KiB
Diff
90 lines
5.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Mariell Hoversholm <proximyst@proximyst.com>
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Date: Sun, 24 Oct 2021 16:20:31 -0400
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Subject: [PATCH] Add Raw Byte Entity Serialization
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== AT ==
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public net.minecraft.world.entity.Entity setLevel(Lnet/minecraft/world/level/Level;)V
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diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
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index 836356ecb3c91fd7886ac9ae83f1cc835469e198..f21bf6c8bbf30c59f1588c2105dbd7f80c07a0f1 100644
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--- a/src/main/java/net/minecraft/world/entity/Entity.java
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+++ b/src/main/java/net/minecraft/world/entity/Entity.java
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@@ -2144,6 +2144,15 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
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}
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}
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+ // Paper start - Entity serialization api
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+ public boolean serializeEntity(CompoundTag compound) {
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+ List<Entity> pass = new java.util.ArrayList<>(this.getPassengers());
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+ this.passengers = ImmutableList.of();
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+ boolean result = save(compound);
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+ this.passengers = ImmutableList.copyOf(pass);
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+ return result;
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+ }
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+ // Paper end - Entity serialization api
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public boolean save(CompoundTag nbt) {
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return this.isPassenger() ? false : this.saveAsPassenger(nbt);
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
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index 7c04eb9e7eb5ff728465b46e3739eb2598ef1204..6fab713531665298d3b03e7960a17ecb1471a6d7 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
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@@ -1087,6 +1087,18 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
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}
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// Paper end - tracked players API
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+ // Paper start - raw entity serialization API
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+ @Override
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+ public boolean spawnAt(Location location, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason reason) {
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+ Preconditions.checkNotNull(location, "location cannot be null");
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+ Preconditions.checkNotNull(reason, "reason cannot be null");
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+ this.entity.setLevel(((CraftWorld) location.getWorld()).getHandle());
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+ this.entity.setPos(location.getX(), location.getY(), location.getZ());
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+ this.entity.setRot(location.getYaw(), location.getPitch());
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+ return !this.entity.valid && this.entity.level().addFreshEntity(this.entity, reason);
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+ }
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+ // Paper end - raw entity serialization API
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+
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// Paper start - missing entity api
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@Override
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public boolean isInvisible() { // Paper - moved up from LivingEntity
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diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
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index 95a6f26f75efda7db41db9091107502e8d4e0453..0e849b49329054005c20a5773de2ff15bf3f6e5d 100644
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--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
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+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
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@@ -488,7 +488,33 @@ public final class CraftMagicNumbers implements UnsafeValues {
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return CraftItemStack.asCraftMirror(net.minecraft.world.item.ItemStack.parse(MinecraftServer.getServer().registryAccess(), compound).orElseThrow());
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}
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- private byte[] serializeNbtToBytes(CompoundTag compound) {
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+ @Override
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+ public byte[] serializeEntity(org.bukkit.entity.Entity entity) {
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+ Preconditions.checkNotNull(entity, "null cannot be serialized");
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+ Preconditions.checkArgument(entity instanceof org.bukkit.craftbukkit.entity.CraftEntity, "only CraftEntities can be serialized");
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+
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+ net.minecraft.nbt.CompoundTag compound = new net.minecraft.nbt.CompoundTag();
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+ ((org.bukkit.craftbukkit.entity.CraftEntity) entity).getHandle().serializeEntity(compound);
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+ return serializeNbtToBytes(compound);
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+ }
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+
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+ @Override
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+ public org.bukkit.entity.Entity deserializeEntity(byte[] data, org.bukkit.World world, boolean preserveUUID) {
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+ Preconditions.checkNotNull(data, "null cannot be deserialized");
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+ Preconditions.checkArgument(data.length > 0, "cannot deserialize nothing");
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+
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+ net.minecraft.nbt.CompoundTag compound = deserializeNbtFromBytes(data);
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+ int dataVersion = compound.getInt("DataVersion");
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+ compound = (net.minecraft.nbt.CompoundTag) MinecraftServer.getServer().fixerUpper.update(References.ENTITY, new Dynamic<>(NbtOps.INSTANCE, compound), dataVersion, this.getDataVersion()).getValue();
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+ if (!preserveUUID) {
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+ // Generate a new UUID so we don't have to worry about deserializing the same entity twice
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+ compound.remove("UUID");
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+ }
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+ return net.minecraft.world.entity.EntityType.create(compound, ((org.bukkit.craftbukkit.CraftWorld) world).getHandle())
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+ .orElseThrow(() -> new IllegalArgumentException("An ID was not found for the data. Did you downgrade?")).getBukkitEntity();
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+ }
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+
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+ private byte[] serializeNbtToBytes(net.minecraft.nbt.CompoundTag compound) {
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compound.putInt("DataVersion", getDataVersion());
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java.io.ByteArrayOutputStream outputStream = new java.io.ByteArrayOutputStream();
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try {
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