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-rw-r--r--patches/server/0410-Fix-Entity-Teleportation-and-cancel-velocity-if-tele.patch107
1 files changed, 107 insertions, 0 deletions
diff --git a/patches/server/0410-Fix-Entity-Teleportation-and-cancel-velocity-if-tele.patch b/patches/server/0410-Fix-Entity-Teleportation-and-cancel-velocity-if-tele.patch
new file mode 100644
index 0000000000..fe536a1eab
--- /dev/null
+++ b/patches/server/0410-Fix-Entity-Teleportation-and-cancel-velocity-if-tele.patch
@@ -0,0 +1,107 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <[email protected]>
+Date: Tue, 25 Aug 2020 20:45:36 -0400
+Subject: [PATCH] Fix Entity Teleportation and cancel velocity if teleported
+
+Uses correct setPositionRotation for Entity teleporting instead of setLocation
+as this is how Vanilla teleports entities.
+
+Cancel any pending motion when teleported.
+
+diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+index 762998180eb7b10151f390ee79690c68d66622f2..d97b1040ecec1d30fdd1bf309a8215955642fb93 100644
+--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
++++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+@@ -679,7 +679,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
+ return;
+ }
+
+- this.player.absMoveTo(this.awaitingPositionFromClient.x, this.awaitingPositionFromClient.y, this.awaitingPositionFromClient.z, this.player.getYRot(), this.player.getXRot());
++ this.player.moveTo(this.awaitingPositionFromClient.x, this.awaitingPositionFromClient.y, this.awaitingPositionFromClient.z, this.player.getYRot(), this.player.getXRot()); // Paper - Fix Entity Teleportation and cancel velocity if teleported
+ this.lastGoodX = this.awaitingPositionFromClient.x;
+ this.lastGoodY = this.awaitingPositionFromClient.y;
+ this.lastGoodZ = this.awaitingPositionFromClient.z;
+@@ -1595,7 +1595,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
+ // CraftBukkit end
+
+ this.awaitingTeleportTime = this.tickCount;
+- this.player.absMoveTo(d0, d1, d2, f, f1);
++ this.player.moveTo(d0, d1, d2, f, f1); // Paper - Fix Entity Teleportation and cancel velocity if teleported
+ this.player.connection.send(new ClientboundPlayerPositionPacket(d0 - d3, d1 - d4, d2 - d5, f - f2, f1 - f3, set, this.awaitingTeleport));
+ }
+
+diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
+index be990f12c61a6079fafbfd3d05ae1ae352d6229d..335962dfe50d8d691a2a1fc6224950641e2b5a2b 100644
+--- a/src/main/java/net/minecraft/world/entity/Entity.java
++++ b/src/main/java/net/minecraft/world/entity/Entity.java
+@@ -171,6 +171,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
+
+ // CraftBukkit start
+ private static final int CURRENT_LEVEL = 2;
++ public boolean preserveMotion = true; // Paper - Fix Entity Teleportation and cancel velocity if teleported; keep initial motion on first setPositionRotation
+ static boolean isLevelAtLeast(CompoundTag tag, int level) {
+ return tag.contains("Bukkit.updateLevel") && tag.getInt("Bukkit.updateLevel") >= level;
+ }
+@@ -1874,6 +1875,13 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
+ }
+
+ public void moveTo(double x, double y, double z, float yaw, float pitch) {
++ // Paper start - Fix Entity Teleportation and cancel velocity if teleported
++ if (!preserveMotion) {
++ this.deltaMovement = Vec3.ZERO;
++ } else {
++ this.preserveMotion = false;
++ }
++ // Paper end - Fix Entity Teleportation and cancel velocity if teleported
+ this.setPosRaw(x, y, z);
+ this.setYRot(yaw);
+ this.setXRot(pitch);
+diff --git a/src/main/java/net/minecraft/world/entity/boss/enderdragon/phases/DragonStrafePlayerPhase.java b/src/main/java/net/minecraft/world/entity/boss/enderdragon/phases/DragonStrafePlayerPhase.java
+index a28e6b6a50cfd9191732ad2e4aca5f639a1fae75..244e328c6f67cfa543ee283715bb3b89dbaa0f0c 100644
+--- a/src/main/java/net/minecraft/world/entity/boss/enderdragon/phases/DragonStrafePlayerPhase.java
++++ b/src/main/java/net/minecraft/world/entity/boss/enderdragon/phases/DragonStrafePlayerPhase.java
+@@ -78,6 +78,7 @@ public class DragonStrafePlayerPhase extends AbstractDragonPhaseInstance {
+ }
+
+ DragonFireball dragonFireball = new DragonFireball(this.dragon.level(), this.dragon, vec34.normalize());
++ dragonFireball.preserveMotion = true; // Paper - Fix Entity Teleportation and cancel velocity if teleported
+ dragonFireball.moveTo(o, p, q, 0.0F, 0.0F);
+ if (new com.destroystokyo.paper.event.entity.EnderDragonShootFireballEvent((org.bukkit.entity.EnderDragon) dragon.getBukkitEntity(), (org.bukkit.entity.DragonFireball) dragonFireball.getBukkitEntity()).callEvent()) // Paper - EnderDragon Events
+ this.dragon.level().addFreshEntity(dragonFireball);
+diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java
+index b90127f9f805fdb5bb43a4b8ad2b10499b0b6b78..8efc06d29c62fa2be8515ed3359d52a6d4b807d2 100644
+--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
++++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
+@@ -164,6 +164,7 @@ public abstract class BaseSpawner {
+ return;
+ }
+
++ entity.preserveMotion = true; // Paper - Fix Entity Teleportation and cancel velocity if teleported; preserve entity motion from tag
+ entity.moveTo(entity.getX(), entity.getY(), entity.getZ(), randomsource.nextFloat() * 360.0F, 0.0F);
+ if (entity instanceof Mob) {
+ Mob entityinsentient = (Mob) entity;
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+index 34321f095e12ea0cca34ff1ec00819c6350205a8..5f5788a502642463091fb76e98703aaec7a86836 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+@@ -240,7 +240,7 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
+ }
+
+ // entity.setLocation() throws no event, and so cannot be cancelled
+- this.entity.absMoveTo(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
++ entity.moveTo(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch()); // Paper - use proper moveTo, as per vanilla teleporting
+ // SPIGOT-619: Force sync head rotation also
+ this.entity.setYHeadRot(location.getYaw());
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+index 344ef786330d1247fdfb56ef04be130c9ffb7d8f..af5aab1755f80222a249b1cc7da595af78dccbbd 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+@@ -590,6 +590,7 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
+ }
+
+ ((AbstractHurtingProjectile) launch).projectileSource = this;
++ launch.preserveMotion = true; // Paper - Fix Entity Teleportation and cancel velocity if teleported
+ launch.moveTo(location.getX(), location.getY(), location.getZ(), location.getYaw(), location.getPitch());
+ } else if (LlamaSpit.class.isAssignableFrom(projectile)) {
+ Location location = this.getEyeLocation();