Slice: Add Smooth Teleports

patches/api/0011-Slice-Smooth-Teleports.patch

@@ -0,0 +1,32 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Cryptite <cryptite@gmail.com>
+Date: Sat, 13 Aug 2022 08:58:21 -0500
+Subject: [PATCH] Slice: Smooth Teleports
+
+Original license: MIT
+Original project: https://github.com/Cryptite/Slice
+
+diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
+index 17683d888d6aa55dcedaca59951aad011af006ed..119b97dab3c3477741191a8afdc3b72a0d9bd085 100644
+--- a/src/main/java/org/bukkit/entity/Player.java
++++ b/src/main/java/org/bukkit/entity/Player.java
+@@ -2809,6 +2809,19 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
+     String getClientBrandName();
+     // Paper end
+ 
++    /**
++     * This abuses some of how Minecraft works and allows teleporting a player to another world without
++     * triggering typical respawn packets. All of natural state of chunk resends, entity adds/removes, etc still
++     * happen but the visual "refresh" of a world change is hidden. Depending on the destination location/world,
++     * this can act as a "smooth teleport" to a world if the new world is very similar looking to the old one.
++     *
++     * @param location New location to teleport this Player to
++     */
++    // Slice start
++    @org.jetbrains.annotations.ApiStatus.Experimental
++    void teleportWithoutRespawn(Location location);
++    // Slice end
++
+     // Paper start - Teleport API
+     /**
+      * Sets the player's rotation.

patches/server/0041-Slice-Smooth-Teleports.patch

@@ -0,0 +1,59 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Cryptite <cryptite@gmail.com>
+Date: Sat, 13 Aug 2022 08:58:14 -0500
+Subject: [PATCH] Slice: Smooth Teleports
+
+Original license: MIT
+Original project: https://github.com/Cryptite/Slice
+
+diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+index b5aaddaf2ef9e7639cbdc682d06330945be3c432..b157f887092b4ca9642548eadd9a633bb74ec14d 100644
+--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
++++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+@@ -268,6 +268,7 @@ public class ServerPlayer extends Player {
+     public final com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> cachedSingleHashSet; // Paper
+     public PlayerNaturallySpawnCreaturesEvent playerNaturallySpawnedEvent; // Paper
+     public org.bukkit.event.player.PlayerQuitEvent.QuitReason quitReason = null; // Paper - there are a lot of changes to do if we change all methods leading to the event
++    public boolean smoothWorldTeleport; // Slice
+     private boolean tpsBar = false; // Purpur
+     private boolean compassBar = false; // Purpur
+     private boolean ramBar = false; // Purpur
+diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
+index c0278a87a77d14c7598e6d431b63bbd5c7d863af..54d9b2c1dcab93b37c02aeda146aef088f20dff0 100644
+--- a/src/main/java/net/minecraft/server/players/PlayerList.java
++++ b/src/main/java/net/minecraft/server/players/PlayerList.java
+@@ -901,12 +901,12 @@ public abstract class PlayerList {
+         int i = flag ? 1 : 0;
+         // CraftBukkit start
+         LevelData worlddata = worldserver1.getLevelData();
+-        entityplayer1.connection.send(new ClientboundRespawnPacket(worldserver1.dimensionTypeId(), worldserver1.dimension(), BiomeManager.obfuscateSeed(worldserver1.getSeed()), entityplayer1.gameMode.getGameModeForPlayer(), entityplayer1.gameMode.getPreviousGameModeForPlayer(), worldserver1.isDebug(), worldserver1.isFlat(), (byte) i, entityplayer1.getLastDeathLocation()));
++        if (!entityplayer.smoothWorldTeleport) entityplayer1.connection.send(new ClientboundRespawnPacket(worldserver1.dimensionTypeId(), worldserver1.dimension(), BiomeManager.obfuscateSeed(worldserver1.getSeed()), entityplayer1.gameMode.getGameModeForPlayer(), entityplayer1.gameMode.getPreviousGameModeForPlayer(), worldserver1.isDebug(), worldserver1.isFlat(), (byte) i, entityplayer1.getLastDeathLocation()));
+         entityplayer1.connection.send(new ClientboundSetChunkCacheRadiusPacket(worldserver1.getChunkSource().chunkMap.playerChunkManager.getTargetSendDistance())); // Spigot // Paper - replace old player chunk management
+         entityplayer1.connection.send(new ClientboundSetSimulationDistancePacket(worldserver1.getChunkSource().chunkMap.playerChunkManager.getTargetTickViewDistance())); // Spigot // Paper - replace old player chunk management
+         entityplayer1.spawnIn(worldserver1);
+         entityplayer1.unsetRemoved();
+-        entityplayer1.connection.teleport(new Location(worldserver1.getWorld(), entityplayer1.getX(), entityplayer1.getY(), entityplayer1.getZ(), entityplayer1.getYRot(), entityplayer1.getXRot()));
++        if (!entityplayer.smoothWorldTeleport) entityplayer1.connection.teleport(new Location(worldserver1.getWorld(), entityplayer1.getX(), entityplayer1.getY(), entityplayer1.getZ(), entityplayer1.getYRot(), entityplayer1.getXRot()));
+         entityplayer1.setShiftKeyDown(false);
+ 
+         // entityplayer1.connection.teleport(entityplayer1.getX(), entityplayer1.getY(), entityplayer1.getZ(), entityplayer1.getYRot(), entityplayer1.getXRot());
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+index 472d9281199cb9cd8edafc6d2309e5e296a014cd..3ef7fec22de7727b8627802e305aa68340798e70 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+@@ -1192,6 +1192,15 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
+         // Paper end
+     }
+ 
++    // Slice start
++    public void teleportWithoutRespawn(Location location) {
++        ServerPlayer serverPlayer = getHandle();
++        serverPlayer.smoothWorldTeleport = true;
++        teleport(location);
++        serverPlayer.smoothWorldTeleport = false;
++    }
++    // Slice end
++
+     @Override
+     public boolean teleport(Location location, PlayerTeleportEvent.TeleportCause cause) {
+         // Paper start - Teleport API