From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Samsuik <40902469+Samsuik@users.noreply.github.com>
Date: Sat, 2 Dec 2023 15:14:15 +0000
Subject: [PATCH] Add option for legacy lava block formation


diff --git a/src/main/java/net/minecraft/world/level/block/LiquidBlock.java b/src/main/java/net/minecraft/world/level/block/LiquidBlock.java
index 2fe44dae063eb0cd7d4813fb6b2937830d432e51..aaac136acbef15a1925b4b6e8da7bfc4f75360de 100644
--- a/src/main/java/net/minecraft/world/level/block/LiquidBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/LiquidBlock.java
@@ -199,7 +199,15 @@ public class LiquidBlock extends Block implements BucketPickup {
                     if (fluidState.isSource()) {
                         block = Blocks.OBSIDIAN;
                     } else {
-                        final me.samsuik.sakura.physics.PhysicsVersion physics = world.localConfig().config(pos).physicsVersion;
+                        // Sakura start - legacy block formation
+                        final me.samsuik.sakura.physics.PhysicsVersion physics;
+
+                        if (world.sakuraConfig().environment.blockGeneration.legacyBlockFormation) {
+                            physics = me.samsuik.sakura.physics.PhysicsVersion.v1_12;
+                        } else {
+                            physics = world.localConfig().config(pos).physicsVersion;
+                        }
+                        // Sakura end
 
                         // SANITY: In legacy a patch by paper removes the fluid level condition from vanilla.
                         if (physics.afterOrEqual(1_16_0) || physics.isLegacy()
diff --git a/src/main/java/net/minecraft/world/level/material/LavaFluid.java b/src/main/java/net/minecraft/world/level/material/LavaFluid.java
index cae1adf85ff35947a9747a21ff887a2ec0a4367a..56dcba3560fb13be9d13b400aea681de98ca800d 100644
--- a/src/main/java/net/minecraft/world/level/material/LavaFluid.java
+++ b/src/main/java/net/minecraft/world/level/material/LavaFluid.java
@@ -177,7 +177,7 @@ public abstract class LavaFluid extends FlowingFluid {
     public boolean canBeReplacedWith(FluidState state, BlockGetter world, BlockPos pos, Fluid fluid, Direction direction) {
         // Sakura start
         return state.getHeight(world, pos) >= 0.44444445F && fluid.is(FluidTags.WATER)
-            && world instanceof Level level && level.localConfig().config(pos).physicsVersion.afterOrEqual(1_13_0);
+            && world instanceof Level level && !level.sakuraConfig().environment.blockGeneration.legacyBlockFormation && level.localConfig().config(pos).physicsVersion.afterOrEqual(1_13_0);
         // Sakura end
     }
 
diff --git a/src/main/java/net/minecraft/world/level/material/WaterFluid.java b/src/main/java/net/minecraft/world/level/material/WaterFluid.java
index 521b8084e490d5f3ecacd1d7368dddee22647aa9..7987b45130e2eeba1dca4bc8bba9efe0cd8b209c 100644
--- a/src/main/java/net/minecraft/world/level/material/WaterFluid.java
+++ b/src/main/java/net/minecraft/world/level/material/WaterFluid.java
@@ -106,7 +106,7 @@ public abstract class WaterFluid extends FlowingFluid {
     public boolean canBeReplacedWith(FluidState state, BlockGetter world, BlockPos pos, Fluid fluid, Direction direction) {
         // Sakura start
         return direction == Direction.DOWN && !fluid.is(FluidTags.WATER)
-            || fluid.is(FluidTags.LAVA) && world instanceof Level level && level.localConfig().config(pos).physicsVersion.before(1_13_0);
+            || fluid.is(FluidTags.LAVA) && world instanceof Level level && (level.sakuraConfig().environment.blockGeneration.legacyBlockFormation || level.localConfig().config(pos).physicsVersion.before(1_13_0));
         // Sakura end
     }