From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Dreeam <61569423+Dreeam-qwq@users.noreply.github.com>
Date: Mon, 11 Sep 2023 15:47:19 -0400
Subject: [PATCH] Reduce canSee work

Credit by: Martijn Muijsers <martijnmuijsers@live.nl>, MachineBreaker<machinebreaker>

diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index ed2bfe717406741583b9c261c6ba18cd4a47f67b..1916e5f1d6bc4c2b14a138a46477adea939caf81 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -383,11 +383,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
         for (int i = 0, len = entities.size(); i < len; ++i) {
             Entity entity = entities.get(i);
 
-            if (checkCanSee && source instanceof net.minecraft.server.level.ServerPlayer && entity instanceof net.minecraft.server.level.ServerPlayer
-                && !((net.minecraft.server.level.ServerPlayer) source).getBukkitEntity().canSee(((net.minecraft.server.level.ServerPlayer) entity).getBukkitEntity())) {
-                continue;
-            }
-
+            // Leaf - move up
             // !entity1.dead && entity1.i && (entity == null || !entity1.x(entity));
             // elide the last check since vanilla calls with entity = null
             // only we care about the source for the canSee check
@@ -395,6 +391,11 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
                 continue;
             }
 
+            if (checkCanSee && source instanceof net.minecraft.server.level.ServerPlayer && entity instanceof net.minecraft.server.level.ServerPlayer
+                && !((net.minecraft.server.level.ServerPlayer) source).getBukkitEntity().canSee(((net.minecraft.server.level.ServerPlayer) entity).getBukkitEntity())) {
+                continue;
+            }
+
             if (net.minecraft.world.phys.shapes.Shapes.joinIsNotEmpty(voxelshape, net.minecraft.world.phys.shapes.Shapes.create(entity.getBoundingBox()), net.minecraft.world.phys.shapes.BooleanOp.AND)) {
                 return false;
             }
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 57d3b887b606800d0d1e12b46ae793c50f09bee3..af472e1532000a764eb7464a1661fbcce561a8e5 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -580,12 +580,14 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         this.getHandle().connection.send(packet);
     }
 
+    // Leaf - TODO
     @Override
     public boolean equals(Object obj) {
         if (!(obj instanceof OfflinePlayer)) {
             return false;
         }
         OfflinePlayer other = (OfflinePlayer) obj;
+        if (this == obj) return true; // Leaf
         if ((this.getUniqueId() == null) || (other.getUniqueId() == null)) {
             return false;
         }
@@ -2102,6 +2104,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         return this.canSee((org.bukkit.entity.Entity) player);
     }
 
+    // Leaf - TODO
     @Override
     public boolean canSee(org.bukkit.entity.Entity entity) {
         return this.equals(entity) || entity.isVisibleByDefault() ^ this.invertedVisibilityEntities.containsKey(entity.getUniqueId()); // SPIGOT-7312: Can always see self