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https://github.com/PaperMC/Paper.git
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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.
156 lines
7.8 KiB
Diff
156 lines
7.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Noah van der Aa <ndvdaa@gmail.com>
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Date: Wed, 15 Sep 2021 20:44:22 +0200
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Subject: [PATCH] Friction API
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diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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index f662a791e8cb045903a0de29778e5f30892fb766..2bb61084b628582ded44926d7697ee26d0bb1e8e 100644
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--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
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@@ -285,6 +285,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
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public boolean bukkitPickUpLoot;
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public org.bukkit.craftbukkit.entity.CraftLivingEntity getBukkitLivingEntity() { return (org.bukkit.craftbukkit.entity.CraftLivingEntity) super.getBukkitEntity(); } // Paper
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public boolean silentDeath = false; // Paper - mark entity as dying silently for cancellable death event
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+ public net.kyori.adventure.util.TriState frictionState = net.kyori.adventure.util.TriState.NOT_SET; // Paper - Friction API
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@Override
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public float getBukkitYaw() {
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@@ -706,7 +707,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
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}
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public boolean shouldDiscardFriction() {
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- return this.discardFriction;
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+ return !this.frictionState.toBooleanOrElse(!this.discardFriction); // Paper - Friction API
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}
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public void setDiscardFriction(boolean noDrag) {
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@@ -774,6 +775,11 @@ public abstract class LivingEntity extends Entity implements Attackable {
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@Override
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public void addAdditionalSaveData(CompoundTag nbt) {
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+ // Paper start - Friction API
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+ if (this.frictionState != net.kyori.adventure.util.TriState.NOT_SET) {
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+ nbt.putString("Paper.FrictionState", this.frictionState.toString());
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+ }
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+ // Paper end - Friction API
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nbt.putFloat("Health", this.getHealth());
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nbt.putShort("HurtTime", (short) this.hurtTime);
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nbt.putInt("HurtByTimestamp", this.lastHurtByMobTimestamp);
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@@ -817,6 +823,16 @@ public abstract class LivingEntity extends Entity implements Attackable {
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}
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this.internalSetAbsorptionAmount(absorptionAmount);
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// Paper end - Check for NaN
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+ // Paper start - Friction API
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+ if (nbt.contains("Paper.FrictionState")) {
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+ String fs = nbt.getString("Paper.FrictionState");
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+ try {
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+ frictionState = net.kyori.adventure.util.TriState.valueOf(fs);
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+ } catch (Exception ignored) {
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+ LOGGER.error("Unknown friction state " + fs + " for " + this);
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+ }
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+ }
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+ // Paper end - Friction API
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if (nbt.contains("attributes", 9) && this.level() != null && !this.level().isClientSide) {
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this.getAttributes().load(nbt.getList("attributes", 10));
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}
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diff --git a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
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index 446c319524183d6a1b4d0e6f0613a8db690677da..cbfb07bdf8d5e2e5a462835184be2d47e59d506c 100644
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--- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
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+++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
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@@ -63,6 +63,7 @@ public class ItemEntity extends Entity implements TraceableEntity {
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private int lastTick = MinecraftServer.currentTick - 1; // CraftBukkit
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public boolean canMobPickup = true; // Paper - Item#canEntityPickup
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private int despawnRate = -1; // Paper - Alternative item-despawn-rate
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+ public net.kyori.adventure.util.TriState frictionState = net.kyori.adventure.util.TriState.NOT_SET; // Paper - Friction API
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public ItemEntity(EntityType<? extends ItemEntity> type, Level world) {
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super(type, world);
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@@ -185,7 +186,11 @@ public class ItemEntity extends Entity implements TraceableEntity {
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this.move(MoverType.SELF, this.getDeltaMovement());
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float f = 0.98F;
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- if (this.onGround()) {
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+ // Paper start - Friction API
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+ if (frictionState == net.kyori.adventure.util.TriState.FALSE) {
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+ f = 1F;
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+ } else if (this.onGround()) {
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+ // Paper end - Friction API
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f = this.level().getBlockState(this.getBlockPosBelowThatAffectsMyMovement()).getBlock().getFriction() * 0.98F;
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}
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@@ -393,6 +398,11 @@ public class ItemEntity extends Entity implements TraceableEntity {
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@Override
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public void addAdditionalSaveData(CompoundTag nbt) {
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+ // Paper start - Friction API
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+ if (this.frictionState != net.kyori.adventure.util.TriState.NOT_SET) {
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+ nbt.putString("Paper.FrictionState", this.frictionState.toString());
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+ }
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+ // Paper end - Friction API
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nbt.putShort("Health", (short) this.health);
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nbt.putShort("Age", (short) this.age);
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nbt.putShort("PickupDelay", (short) this.pickupDelay);
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@@ -435,6 +445,17 @@ public class ItemEntity extends Entity implements TraceableEntity {
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this.setItem(ItemStack.EMPTY);
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}
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+ // Paper start - Friction API
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+ if (nbt.contains("Paper.FrictionState")) {
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+ String fs = nbt.getString("Paper.FrictionState");
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+ try {
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+ frictionState = net.kyori.adventure.util.TriState.valueOf(fs);
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+ } catch (Exception ignored) {
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+ com.mojang.logging.LogUtils.getLogger().error("Unknown friction state " + fs + " for " + this);
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+ }
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+ }
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+ // Paper end - Friction API
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+
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if (this.getItem().isEmpty()) {
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this.discard(null); // CraftBukkit - add Bukkit remove cause
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java
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index 1a291dd8a287db30e71dcb315599fc4b038764c4..30d62ee4d5cd2ddacb8783b5bbbf475d592b3e02 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java
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@@ -99,6 +99,18 @@ public class CraftItem extends CraftEntity implements Item {
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this.getHandle().age = willAge ? 0 : NO_AGE_TIME;
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}
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+ @org.jetbrains.annotations.NotNull
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+ @Override
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+ public net.kyori.adventure.util.TriState getFrictionState() {
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+ return this.getHandle().frictionState;
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+ }
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+
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+ @Override
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+ public void setFrictionState(@org.jetbrains.annotations.NotNull net.kyori.adventure.util.TriState state) {
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+ java.util.Objects.requireNonNull(state, "state may not be null");
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+ this.getHandle().frictionState = state;
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+ }
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+
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@Override
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public int getHealth() {
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return this.getHandle().health;
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diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
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index 9134ce983f5c798e2925348ac9d3b8570965d415..89b66fd33cdeab03a6b208f9c59df767787a42bf 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
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@@ -1155,4 +1155,17 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
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nmsStack.hurtAndBreak(amount, this.getHandle(), slot, true);
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}
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// Paper end - ItemStack damage API
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+ // Paper start - friction API
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+ @org.jetbrains.annotations.NotNull
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+ @Override
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+ public net.kyori.adventure.util.TriState getFrictionState() {
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+ return this.getHandle().frictionState;
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+ }
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+
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+ @Override
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+ public void setFrictionState(@org.jetbrains.annotations.NotNull net.kyori.adventure.util.TriState state) {
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+ java.util.Objects.requireNonNull(state, "state may not be null");
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+ this.getHandle().frictionState = state;
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+ }
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+ // Paper end - friction API
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}
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