From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: BillyGalbreath Date: Fri, 10 Nov 2017 23:03:12 -0500 Subject: [PATCH] ExperienceOrb merging/stacking API and fixes Adds an option for maximum exp value when merging orbs Adds ExperienceOrbMergeEvent Fired when the server is about to merge 2 experience orbs as entities. Plugins can cancel it if they want to ensure experience orbs do not lose important metadata such as spawn reason, or conditionally move data from source to target. Fixes an issue where the stacked count was not taking into account for mending repairs and when merging with spigot's merge-on-spawn logic == AT == public net.minecraft.world.entity.ExperienceOrb count Co-authored-by: Aikar Co-authored-by: Jake Potrebic diff --git a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java index 9d9e3daebc5da0af627c3d3cdb50029aacbc587b..3a7af27bb1ce0cbe56bd3760cd400083daf98d4c 100644 --- a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java +++ b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java @@ -245,6 +245,7 @@ public class ExperienceOrb extends Entity { } private static boolean tryMergeToExisting(ServerLevel world, Vec3 pos, int amount) { + // Paper - TODO some other event for this kind of merge AABB axisalignedbb = AABB.ofSize(pos, 1.0D, 1.0D, 1.0D); int j = world.getRandom().nextInt(40); List list = world.getEntities(EntityTypeTest.forClass(ExperienceOrb.class), axisalignedbb, (entityexperienceorb) -> { @@ -271,6 +272,11 @@ public class ExperienceOrb extends Entity { } private void merge(ExperienceOrb other) { + // Paper start - call orb merge event + if (!new com.destroystokyo.paper.event.entity.ExperienceOrbMergeEvent((org.bukkit.entity.ExperienceOrb) this.getBukkitEntity(), (org.bukkit.entity.ExperienceOrb) other.getBukkitEntity()).callEvent()) { + return; + } + // Paper end - call orb merge event this.count += other.count; this.age = Math.min(this.age, other.age); other.discard(EntityRemoveEvent.Cause.MERGE); // CraftBukkit - add Bukkit remove cause @@ -364,7 +370,7 @@ public class ExperienceOrb extends Entity { int l = amount - k * amount / j; if (l > 0) { - this.value = l; // CraftBukkit - update exp value of orb for PlayerItemMendEvent calls + // 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 return this.repairPlayerItems(player, l); } } diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java index 5a7d314ec0562e472f5dc45924a7b24841cff126..650e4a01cecc4cc08e7ff9ebcc4c367084351f21 100644 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java @@ -18,6 +18,18 @@ public class CraftExperienceOrb extends CraftEntity implements ExperienceOrb { this.getHandle().value = value; } + // Paper start - expose count + @Override + public int getCount() { + return this.getHandle().count; + } + + @Override + public void setCount(final int count) { + this.getHandle().count = count; + } + // Paper end + // Paper start public java.util.UUID getTriggerEntityId() { return getHandle().triggerEntityId; diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java index 6b094f8bdf1f25d5c2e108eb88d95aed4a41f6f3..cb708c5ce9e81005d638f03e398e7f0f2b9f7521 100644 --- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java +++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java @@ -712,15 +712,29 @@ public class CraftEventFactory { if (entity instanceof net.minecraft.world.entity.ExperienceOrb xp) { double radius = world.spigotConfig.expMerge; if (radius > 0) { + // Paper start - Maximum exp value when merging; Whole section has been tweaked, see comments for specifics + final long maxValue = world.paperConfig().entities.behavior.experienceMergeMaxValue; + final boolean mergeUnconditionally = maxValue <= 0; + if (mergeUnconditionally || xp.value < maxValue) { // Paper - Skip iteration if unnecessary + List entities = world.getEntities(entity, entity.getBoundingBox().inflate(radius, radius, radius)); for (Entity e : entities) { if (e instanceof net.minecraft.world.entity.ExperienceOrb loopItem) { - if (!loopItem.isRemoved()) { + // Paper start + 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 + long newTotal = (long)xp.value + (long)loopItem.value; + if ((int) newTotal < 0) continue; // Overflow + if (!mergeUnconditionally && newTotal > maxValue) { + loopItem.value = (int) (newTotal - maxValue); + xp.value = (int) maxValue; + } else { xp.value += loopItem.value; loopItem.discard(null); // Add Bukkit remove cause + } // Paper end - Maximum exp value when merging } } } + } // Paper end - End iteration skip check - All tweaking ends here } } // Spigot end