From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MartijnMuijsers <martijnmuijsers@live.nl>
Date: Thu, 24 Nov 2022 10:31:38 +0100
Subject: [PATCH] Reduce in wall checks

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

This patch is based on the following patch:
"Optimize suffocation"
By: Kevin Raneri <kevin.raneri@gmail.com>
As part of: Pufferfish (https://github.com/pufferfish-gg/Pufferfish)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)

* Pufferfish description *

The isInWall check to determine suffocation is quite expensive, and
often is completely unnecessary to check. We do two things here to
improve this:

1. We only check for suffocation once per 20 ticks. The maximum
no-damage ticks value means that this change should be extremely
difficult, if not impossible, for players to notice.

2. We additionally execute a check to see if the player can even take
damage in the first place. This check doesn't improve performance much
but is so much cheaper than the suffocation check that it's worth
keeping it.

diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index e1614462ba2f186db2b9febcc86afc270754199c..d8ee1536244ab780bc0c5d4e1a72dad4a12328f1 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -399,7 +399,10 @@ public abstract class LivingEntity extends Entity {
         if (this.isAlive()) {
             boolean flag = this instanceof net.minecraft.world.entity.player.Player;
 
-            if (this.isInWall()) {
+            // Gale start - Pufferfish - reduce in wall checks
+            long checkStuckInWallInterval = this.level.galeConfig().smallOptimizations.reducedIntervals.checkStuckInWall;
+            if ((checkStuckInWallInterval <= 1 || (tickCount % checkStuckInWallInterval == 0 && couldPossiblyBeHurt(1.0F))) && this.isInWall()) {
+                // Gale end - Pufferfish - reduce in wall checks
                 this.hurt(DamageSource.IN_WALL, 1.0F);
             } else if (flag && !this.level.getWorldBorder().isWithinBounds(this.getBoundingBox())) {
                 double d0 = this.level.getWorldBorder().getDistanceToBorder(this) + this.level.getWorldBorder().getDamageSafeZone();
@@ -1313,6 +1316,15 @@ public abstract class LivingEntity extends Entity {
         return this.getHealth() <= 0.0F;
     }
 
+    // Gale start - Pufferfish - reduce in wall checks
+    public boolean couldPossiblyBeHurt(float amount) {
+        if ((float) this.invulnerableTime > (float) this.invulnerableDuration / 2.0F && amount <= this.lastHurt) {
+            return false;
+        }
+        return true;
+    }
+    // Gale end - Pufferfish - reduce in wall checks
+
     @Override
     public boolean hurt(DamageSource source, float amount) {
         if (this.isInvulnerableTo(source)) {
diff --git a/src/main/java/org/galemc/gale/configuration/GaleWorldConfiguration.java b/src/main/java/org/galemc/gale/configuration/GaleWorldConfiguration.java
index a80748f108c4973e1a3df7e0ff0e11160c91adb9..e6df3b765627d5aa800b1b697d1cfa96a676fe8e 100644
--- a/src/main/java/org/galemc/gale/configuration/GaleWorldConfiguration.java
+++ b/src/main/java/org/galemc/gale/configuration/GaleWorldConfiguration.java
@@ -101,6 +101,21 @@ public class GaleWorldConfiguration extends ConfigurationPart {
             public int acquirePoiForStuckEntity = 200;
             // Gale end - Airplane - reduce acquire POI for stuck entities
 
+            // Gale start - Pufferfish - reduce in wall checks
+            /**
+             * Interval at which to check whether an entity is stuck in a wall, to deal suffocation damage.
+             * Since after dealing damage, there is an interval (this may change in the future, but approximately
+             * 1 second) at which entities cannot take repeated damage, delaying the suffocation check by less is
+             * almost unnoticeable.
+             * Any value <= 0 behaves like 1.
+             * <ul>
+             *     <li><i>Default</i>: 10 (twice per second)</li>
+             *     <li><i>Vanilla</i>: 1</li>
+             * </ul>
+             */
+            public int checkStuckInWall = 10;
+            // Gale end - Pufferfish - reduce in wall checks
+
         }
 
     }