Fix wrong entity behavior in fluid caused by inconsistent fluid count

patches/server/0135-Fix-wrong-entity-behavior-in-fluid-caused-by-inconsi.patch

@@ -0,0 +1,24 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Dreeam <[email protected]>
+Date: Fri, 8 Nov 2024 23:38:51 -0500
+Subject: [PATCH] Fix wrong entity behavior in fluid caused by inconsistent
+ fluid count
+
+Revert Gale (Airplane)'s `no entity fluid lookup if no fluid`, to fix
+wrong entity behavior on water.
+This issue caused by inconsistent fluid count, because of a condition change
+in LevelChunkSection#setBlockState, introduced by Moonrise's block count optimisation
+
+diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
+index 976d72b611011cccf4b4efadc9772ce1c68ef5ee..1309fa679b4e73645fac6ae04044709915092574 100644
+--- a/src/main/java/net/minecraft/world/entity/Entity.java
++++ b/src/main/java/net/minecraft/world/entity/Entity.java
+@@ -4797,7 +4797,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
+                     for (int currY = minYIterate; currY < maxYIterate; ++currY) {
+                         net.minecraft.world.level.chunk.LevelChunkSection section = sections[(currY >> 4) - minSection];
+
+-                        if (section == null || section.hasOnlyAir() || section.fluidStateCount == 0) { // if no fluids, nothing in this section
++                        if (section == null || section.hasOnlyAir()) { // Leaf - Fix wrong entity behavior in fluid caused by inconsistent fluid count
+                             // empty
+                             // skip to next section
+                             currY = (currY & ~(15)) + 15; // increment by 15: iterator loop increments by the extra one