From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Wed, 23 Nov 2022 20:40:40 +0100
Subject: [PATCH] Cache on climbable check

License: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
Gale - https://galemc.org

This patch is based on the following patch:
"Cache climbing check for activation"
By: Paul Sauve <paul@technove.co>
As part of: Airplane (https://github.com/TECHNOVE/Airplane)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)

* Airplane copyright *

Airplane
Copyright (C) 2020 Technove LLC

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.

diff --git a/io/papermc/paper/entity/activation/ActivationRange.java b/io/papermc/paper/entity/activation/ActivationRange.java
index ae2bb9a73106febfe5f0d090abd4252bbb5fd27e..eee9c41e40402e52b73f34a734b4cbdeb6cfbc22 100644
--- a/io/papermc/paper/entity/activation/ActivationRange.java
+++ b/io/papermc/paper/entity/activation/ActivationRange.java
@@ -221,7 +221,7 @@ public final class ActivationRange {
         }
         // special cases.
         if (entity instanceof final LivingEntity living) {
-            if (living.onClimbable() || living.jumping || living.hurtTime > 0 || !living.activeEffects.isEmpty() || living.isFreezing()) {
+            if (living.onClimbableCached() || living.jumping || living.hurtTime > 0 || !living.activeEffects.isEmpty() || living.isFreezing()) { // Gale - Airplane - cache on climbable check - use cached
                 return 1;
             }
             if (entity instanceof final Mob mob && mob.getTarget() != null) {
diff --git a/net/minecraft/world/entity/LivingEntity.java b/net/minecraft/world/entity/LivingEntity.java
index 97431aa47b5425578bf14b992596962c64c87f35..e174c7b8c637e6983cf0778e6956d8d11e9cd7d1 100644
--- a/net/minecraft/world/entity/LivingEntity.java
+++ b/net/minecraft/world/entity/LivingEntity.java
@@ -2115,6 +2115,21 @@ public abstract class LivingEntity extends Entity implements Attackable, Waypoin
         return this.lastClimbablePos;
     }
 
+
+    // Gale start - Airplane - cache on climbable check
+    private boolean cachedOnClimbable = false;
+    private BlockPos lastClimbingPosition = null;
+
+    public boolean onClimbableCached() {
+        if (!this.blockPosition().equals(this.lastClimbingPosition)) {
+            this.cachedOnClimbable = this.onClimbable();
+            this.lastClimbingPosition = this.blockPosition();
+        }
+
+        return this.cachedOnClimbable;
+    }
+    // Gale end - Airplane - cache on climbable check
+
     public boolean onClimbable() {
         if (this.isSpectator()) {
             return false;