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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.
114 lines
6.2 KiB
Diff
114 lines
6.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: BillyGalbreath <Blake.Galbreath@GMail.com>
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Date: Fri, 10 Nov 2017 23:03:12 -0500
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Subject: [PATCH] ExperienceOrb merging/stacking API and fixes
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Adds an option for maximum exp value when merging orbs
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Adds ExperienceOrbMergeEvent
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Fired when the server is about to merge 2 experience orbs
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as entities. Plugins can cancel it if they want to ensure experience orbs do not lose important
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metadata such as spawn reason, or conditionally move data from source to target.
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Fixes an issue where the stacked count was not taking into account
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for mending repairs and when merging with spigot's merge-on-spawn
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logic
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== AT ==
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public net.minecraft.world.entity.ExperienceOrb count
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Co-authored-by: Aikar <aikar@aikar.co>
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Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
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diff --git a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
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index 0916e24271d07ad5db51c5bc68791722b0f69c2b..a758b2456acac23095fe4619ae10300a034cb460 100644
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--- a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
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+++ b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
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@@ -244,6 +244,7 @@ public class ExperienceOrb extends Entity {
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}
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private static boolean tryMergeToExisting(ServerLevel world, Vec3 pos, int amount) {
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+ // Paper - TODO some other event for this kind of merge
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AABB axisalignedbb = AABB.ofSize(pos, 1.0D, 1.0D, 1.0D);
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int j = world.getRandom().nextInt(40);
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List<ExperienceOrb> list = world.getEntities(EntityTypeTest.forClass(ExperienceOrb.class), axisalignedbb, (entityexperienceorb) -> {
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@@ -270,6 +271,11 @@ public class ExperienceOrb extends Entity {
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}
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private void merge(ExperienceOrb other) {
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+ // Paper start - call orb merge event
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+ if (!new com.destroystokyo.paper.event.entity.ExperienceOrbMergeEvent((org.bukkit.entity.ExperienceOrb) this.getBukkitEntity(), (org.bukkit.entity.ExperienceOrb) other.getBukkitEntity()).callEvent()) {
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+ return;
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+ }
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+ // Paper end - call orb merge event
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this.count += other.count;
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this.age = Math.min(this.age, other.age);
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other.discard(EntityRemoveEvent.Cause.MERGE); // CraftBukkit - add Bukkit remove cause
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@@ -360,7 +366,7 @@ public class ExperienceOrb extends Entity {
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int l = amount - k * amount / j;
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if (l > 0) {
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- this.value = l; // CraftBukkit - update exp value of orb for PlayerItemMendEvent calls
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+ // this.value = l; // CraftBukkit - update exp value of orb for PlayerItemMendEvent calls // Paper - the value field should not be mutated here because it doesn't take "count" into account
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return this.repairPlayerItems(player, l);
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}
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java
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index 5a7d314ec0562e472f5dc45924a7b24841cff126..650e4a01cecc4cc08e7ff9ebcc4c367084351f21 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java
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@@ -18,6 +18,18 @@ public class CraftExperienceOrb extends CraftEntity implements ExperienceOrb {
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this.getHandle().value = value;
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}
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+ // Paper start - expose count
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+ @Override
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+ public int getCount() {
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+ return this.getHandle().count;
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+ }
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+
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+ @Override
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+ public void setCount(final int count) {
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+ this.getHandle().count = count;
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+ }
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+ // Paper end
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+
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// Paper start
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public java.util.UUID getTriggerEntityId() {
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return getHandle().triggerEntityId;
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diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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index 26f8a8cb18205bfb9fe9dc557097946987ddcb18..f3ec3d14e66b9c1dff32088d4aef57e21265048c 100644
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--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
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@@ -714,15 +714,29 @@ public class CraftEventFactory {
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if (entity instanceof net.minecraft.world.entity.ExperienceOrb xp) {
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double radius = world.spigotConfig.expMerge;
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if (radius > 0) {
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+ // Paper start - Maximum exp value when merging; Whole section has been tweaked, see comments for specifics
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+ final long maxValue = world.paperConfig().entities.behavior.experienceMergeMaxValue;
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+ final boolean mergeUnconditionally = maxValue <= 0;
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+ if (mergeUnconditionally || xp.value < maxValue) { // Paper - Skip iteration if unnecessary
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+
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List<Entity> entities = world.getEntities(entity, entity.getBoundingBox().inflate(radius, radius, radius));
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for (Entity e : entities) {
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if (e instanceof net.minecraft.world.entity.ExperienceOrb loopItem) {
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- if (!loopItem.isRemoved()) {
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+ // Paper start
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+ if (!loopItem.isRemoved() && xp.count == loopItem.count && (mergeUnconditionally || loopItem.value < maxValue) && new com.destroystokyo.paper.event.entity.ExperienceOrbMergeEvent((org.bukkit.entity.ExperienceOrb) entity.getBukkitEntity(), (org.bukkit.entity.ExperienceOrb) loopItem.getBukkitEntity()).callEvent()) { // Paper - ExperienceOrbMergeEvent
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+ long newTotal = (long)xp.value + (long)loopItem.value;
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+ if ((int) newTotal < 0) continue; // Overflow
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+ if (!mergeUnconditionally && newTotal > maxValue) {
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+ loopItem.value = (int) (newTotal - maxValue);
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+ xp.value = (int) maxValue;
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+ } else {
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xp.value += loopItem.value;
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loopItem.discard(null); // Add Bukkit remove cause
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+ } // Paper end - Maximum exp value when merging
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}
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}
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}
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+ } // Paper end - End iteration skip check - All tweaking ends here
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}
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}
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// Spigot end
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