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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.
119 lines
8.0 KiB
Diff
119 lines
8.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sun, 28 Jun 2020 03:59:10 -0400
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Subject: [PATCH] Fix Per World Difficulty / Remembering Difficulty
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Fixes per world difficulty with /difficulty command and also
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makes it so that the server keeps the last difficulty used instead
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of restoring the server.properties every single load.
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index 0370d26bd1e1d2fe1d640b052aca8a9c05dcb9dc..dd5f74fe4c8ca81b1d1102805ea8acb9087ba91e 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -836,7 +836,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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worldloadlistener.stop();
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// CraftBukkit start
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// this.updateMobSpawningFlags();
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- worldserver.setSpawnSettings(this.isSpawningMonsters(), this.isSpawningAnimals());
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+ worldserver.setSpawnSettings(worldserver.serverLevelData.getDifficulty() != Difficulty.PEACEFUL && ((DedicatedServer) this).settings.getProperties().spawnMonsters, this.isSpawningAnimals()); // Paper - per level difficulty (from setDifficulty(ServerLevel, Difficulty, boolean))
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this.forceTicks = false;
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// CraftBukkit end
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@@ -1846,11 +1846,14 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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}
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}
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- public void setDifficulty(Difficulty difficulty, boolean forceUpdate) {
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- if (forceUpdate || !this.worldData.isDifficultyLocked()) {
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- this.worldData.setDifficulty(this.worldData.isHardcore() ? Difficulty.HARD : difficulty);
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- this.updateMobSpawningFlags();
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- this.getPlayerList().getPlayers().forEach(this::sendDifficultyUpdate);
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+ // Paper start - per level difficulty
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+ public void setDifficulty(ServerLevel level, Difficulty difficulty, boolean forceUpdate) {
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+ PrimaryLevelData worldData = level.serverLevelData;
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+ if (forceUpdate || !worldData.isDifficultyLocked()) {
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+ worldData.setDifficulty(worldData.isHardcore() ? Difficulty.HARD : difficulty);
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+ level.setSpawnSettings(worldData.getDifficulty() != Difficulty.PEACEFUL && ((DedicatedServer) this).settings.getProperties().spawnMonsters, this.isSpawningAnimals());
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+ // this.getPlayerList().getPlayers().forEach(this::sendDifficultyUpdate);
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+ // Paper end - per level difficulty
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}
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}
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@@ -1864,7 +1867,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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while (iterator.hasNext()) {
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ServerLevel worldserver = (ServerLevel) iterator.next();
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- worldserver.setSpawnSettings(this.isSpawningMonsters(), this.isSpawningAnimals());
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+ worldserver.setSpawnSettings(worldserver.serverLevelData.getDifficulty() != Difficulty.PEACEFUL && ((DedicatedServer) this).settings.getProperties().spawnMonsters, this.isSpawningAnimals()); // Paper - per level difficulty (from setDifficulty(ServerLevel, Difficulty, boolean))
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}
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}
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diff --git a/src/main/java/net/minecraft/server/commands/DifficultyCommand.java b/src/main/java/net/minecraft/server/commands/DifficultyCommand.java
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index 997a96a21440ae72696d68f8031ece4ba487d3ef..3d8584929cee000ae7df10c5bd94f35820e70294 100644
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--- a/src/main/java/net/minecraft/server/commands/DifficultyCommand.java
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+++ b/src/main/java/net/minecraft/server/commands/DifficultyCommand.java
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@@ -49,7 +49,7 @@ public class DifficultyCommand {
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if (worldServer.getDifficulty() == difficulty) { // CraftBukkit
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throw DifficultyCommand.ERROR_ALREADY_DIFFICULT.create(difficulty.getKey());
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} else {
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- worldServer.serverLevelData.setDifficulty(difficulty); // CraftBukkit
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+ minecraftserver.setDifficulty(worldServer, difficulty, true); // Paper - per level difficulty; don't skip other difficulty-changing logic (fix upstream's fix)
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source.sendSuccess(() -> {
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return Component.translatable("commands.difficulty.success", difficulty.getDisplayName());
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}, true);
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diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
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index d6dc8c983d26ce89f17a990be4284fdc78ad164b..2b1d7a2360a9ee7bca9d93a2dc8c61d1648a8348 100644
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--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
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+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
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@@ -350,7 +350,7 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
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@Override
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public void forceDifficulty() {
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- this.setDifficulty(this.getProperties().difficulty, true);
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+ // this.setDifficulty(this.getProperties().difficulty, true); // Paper - per level difficulty; Don't overwrite level.dat's difficulty, keep current
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}
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@Override
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index e242ca5ec8c50bfd81b8ab1429e6e4e441025a75..d2eb8c619905d87a38820a4c1179ad93093c0ac3 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -3259,7 +3259,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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public void handleChangeDifficulty(ServerboundChangeDifficultyPacket packet) {
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PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
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if (this.player.hasPermissions(2) || this.isSingleplayerOwner()) {
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- this.server.setDifficulty(packet.getDifficulty(), false);
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+ // this.server.setDifficulty(packet.getDifficulty(), false); // Paper - per level difficulty; don't allow clients to change this
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}
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index 610661dec58b9170d2eb2093c7fab81585ff9a2c..89c4763b990ca9e801ee16c4a50e806740d061d9 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -996,8 +996,8 @@ public final class CraftServer implements Server {
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org.spigotmc.SpigotConfig.init((File) this.console.options.valueOf("spigot-settings")); // Spigot
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this.console.paperConfigurations.reloadConfigs(this.console);
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for (ServerLevel world : this.console.getAllLevels()) {
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- world.serverLevelData.setDifficulty(config.difficulty);
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- world.setSpawnSettings(config.spawnMonsters, config.spawnAnimals);
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+ // world.serverLevelData.setDifficulty(config.difficulty); // Paper - per level difficulty
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+ world.setSpawnSettings(world.serverLevelData.getDifficulty() != Difficulty.PEACEFUL && config.spawnMonsters, config.spawnAnimals); // Paper - per level difficulty (from MinecraftServer#setDifficulty(ServerLevel, Difficulty, boolean))
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for (SpawnCategory spawnCategory : SpawnCategory.values()) {
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if (CraftSpawnCategory.isValidForLimits(spawnCategory)) {
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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index 20bb365b188c7081123db87186f0e1a999758817..a381688de78f5a78980b660f9765f839413a6c65 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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@@ -1165,7 +1165,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public void setDifficulty(Difficulty difficulty) {
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- this.getHandle().serverLevelData.setDifficulty(net.minecraft.world.Difficulty.byId(difficulty.getValue()));
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+ this.getHandle().getServer().setDifficulty(this.getHandle(), net.minecraft.world.Difficulty.byId(difficulty.getValue()), true); // Paper - per level difficulty; don't skip other difficulty-changing logic
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}
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@Override
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