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

Co-authored-by: HaHaWTH <102713261+HaHaWTH@users.noreply.github.com>

diff --git a/net/minecraft/server/level/ServerPlayer.java b/net/minecraft/server/level/ServerPlayer.java
index 668c173dc69b4ab77d91666dc2059f2b9afd7ee7..d44c3baa2ef30d5cd4c46e491ff9198fa558513c 100644
--- a/net/minecraft/server/level/ServerPlayer.java
+++ b/net/minecraft/server/level/ServerPlayer.java
@@ -403,6 +403,7 @@ public class ServerPlayer extends Player implements ca.spottedleaf.moonrise.patc
     private boolean tpsBar = false; // Purpur - Implement TPSBar
     private boolean compassBar = false; // Purpur - Add compass command
     private boolean ramBar = false; // Purpur - Implement rambar commands
+    public boolean smoothWorldTeleport; // Slice
 
     // Paper start - rewrite chunk system
     private ca.spottedleaf.moonrise.patches.chunk_system.player.RegionizedPlayerChunkLoader.PlayerChunkLoaderData chunkLoader;
diff --git a/net/minecraft/server/players/PlayerList.java b/net/minecraft/server/players/PlayerList.java
index 13edcfd9debc68167a3ea45699229d525d931f68..9a2f2dc1eb471776de6049590cb16e8a061aa24e 100644
--- a/net/minecraft/server/players/PlayerList.java
+++ b/net/minecraft/server/players/PlayerList.java
@@ -798,11 +798,11 @@ public abstract class PlayerList {
         byte b = (byte)(keepInventory ? 1 : 0);
         ServerLevel serverLevel = serverPlayer.serverLevel();
         LevelData levelData = serverLevel.getLevelData();
-        serverPlayer.connection.send(new ClientboundRespawnPacket(serverPlayer.createCommonSpawnInfo(serverLevel), b));
+        if (!serverPlayer.smoothWorldTeleport || !isSameLogicalHeight((ServerLevel) fromWorld, level)) serverPlayer.connection.send(new ClientboundRespawnPacket(serverPlayer.createCommonSpawnInfo(serverLevel), b)); // Leaf - Slice
         // serverPlayer.connection.teleport(serverPlayer.getX(), serverPlayer.getY(), serverPlayer.getZ(), serverPlayer.getYRot(), serverPlayer.getXRot());
         serverPlayer.connection.send(new ClientboundSetChunkCacheRadiusPacket(serverLevel.spigotConfig.viewDistance)); // Spigot
         serverPlayer.connection.send(new ClientboundSetSimulationDistancePacket(serverLevel.spigotConfig.simulationDistance)); // Spigot
-        serverPlayer.connection.teleport(org.bukkit.craftbukkit.util.CraftLocation.toBukkit(serverPlayer.position(), serverLevel.getWorld(), serverPlayer.getYRot(), serverPlayer.getXRot())); // CraftBukkit
+        if (!serverPlayer.smoothWorldTeleport || !isSameLogicalHeight((ServerLevel) fromWorld, level)) serverPlayer.connection.teleport(org.bukkit.craftbukkit.util.CraftLocation.toBukkit(serverPlayer.position(), serverLevel.getWorld(), serverPlayer.getYRot(), serverPlayer.getXRot())); // CraftBukkit // Leaf - Slice
         serverPlayer.connection.send(new ClientboundSetDefaultSpawnPositionPacket(level.getSharedSpawnPos(), level.getSharedSpawnAngle()));
         serverPlayer.connection.send(new ClientboundChangeDifficultyPacket(levelData.getDifficulty(), levelData.isDifficultyLocked()));
         serverPlayer.connection
@@ -876,6 +876,8 @@ public abstract class PlayerList {
         return serverPlayer;
     }
 
+    public static boolean isSameLogicalHeight(ServerLevel fromLevel, ServerLevel toLevel) { return fromLevel.getLogicalHeight() == toLevel.getLogicalHeight(); } // Leaf - Slice - Check world height before smooth teleport
+
     public void sendActivePlayerEffects(ServerPlayer player) {
         this.sendActiveEffects(player, player.connection);
     }