PaperMC/patches/server/0499-Fix-Entity-Teleportation-and-cancel-velocity-if-tele.patch
Jake Potrebic 1c5f8b0fce
Updated Upstream (Bukkit/CraftBukkit) (#7604)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
33a2b476 PR-734: Make PlayerInventory#getItem Nullable

CraftBukkit Changes:
953d3ddc SPIGOT-3034: PlayerKickEvent.setLeaveMessage(String) doesn't actually do anything
2c47af0c SPIGOT-6963: CraftMetaBlockState#getBlockState applied TileEntity ids without the minecraft namespace prefix.
2022-03-16 16:57:51 +01:00

83 lines
5.3 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
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 82ef4b4f99216eee00c867565d55e133bf7d8bcb..9d073564faa0f8dbd46ea6f9590a8260368fcbb0 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -689,7 +689,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
public void handleAcceptTeleportPacket(ServerboundAcceptTeleportationPacket packet) {
PacketUtils.ensureRunningOnSameThread(packet, this, this.player.getLevel());
if (packet.getId() == this.awaitingTeleport && this.awaitingPositionFromClient != null) { // CraftBukkit
- 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 - use proper setPositionRotation for teleportation
this.lastGoodX = this.awaitingPositionFromClient.x;
this.lastGoodY = this.awaitingPositionFromClient.y;
this.lastGoodZ = this.awaitingPositionFromClient.z;
@@ -1573,7 +1573,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
// CraftBukkit end
this.awaitingTeleportTime = this.tickCount;
- this.player.absMoveTo(d0, d1, d2, f, f1);
+ this.player.moveTo(d0, d1, d2, f, f1); // Paper - use proper setPositionRotation for teleportation
this.player.connection.send(new ClientboundPlayerPositionPacket(d0 - d3, d1 - d4, d2 - d5, f - f2, f1 - f3, set, this.awaitingTeleport, flag));
}
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 2df33172415c8da39b9f299027cd86d2ce7c6890..bd285a7d84c934ec094099810eac1f03c09118e3 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -154,6 +154,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
// CraftBukkit start
private static final int CURRENT_LEVEL = 2;
+ public boolean preserveMotion = true; // Paper - keep initial motion on first setPositionRotation
static boolean isLevelAtLeast(CompoundTag tag, int level) {
return tag.contains("Bukkit.updateLevel") && tag.getInt("Bukkit.updateLevel") >= level;
}
@@ -1567,6 +1568,13 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
}
public void moveTo(double x, double y, double z, float yaw, float pitch) {
+ // Paper - cancel entity velocity if teleported
+ if (!preserveMotion) {
+ this.deltaMovement = Vec3.ZERO;
+ } else {
+ this.preserveMotion = false;
+ }
+ // Paper end
this.setPosRaw(x, y, z);
this.setYRot(yaw);
this.setXRot(pitch);
diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java
index 70e1f9bd9e4711aaf45ff8b7214726de646997ab..4bfebbb2e87464cd47a38a5da6275b2c662fa052 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -161,6 +161,7 @@ public abstract class BaseSpawner {
return;
}
+ entity.preserveMotion = true; // Paper - preserve entity motion from tag
entity.moveTo(entity.getX(), entity.getY(), entity.getZ(), world.random.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 1f2503748e0534d48db558d09997683d563b649c..8ec7cd4ea41c28c1f730df649b7cf73d57d60b55 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java
@@ -579,7 +579,7 @@ 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 setPosition, as per vanilla teleporting
// SPIGOT-619: Force sync head rotation also
this.entity.setYHeadRot(location.getYaw());