From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <Blake.Galbreath@GMail.com>
Date: Wed, 8 Jun 2022 15:19:41 -0400
Subject: [PATCH] Add config for snow on blue ice


diff --git a/net/minecraft/world/level/block/SnowLayerBlock.java b/net/minecraft/world/level/block/SnowLayerBlock.java
index 9908a0b5b1fec5f9de518a733f7abbbff7e1a9f9..0ad444cf7f798f63e9140a42c5d5d8cab0fcf14f 100644
--- a/net/minecraft/world/level/block/SnowLayerBlock.java
+++ b/net/minecraft/world/level/block/SnowLayerBlock.java
@@ -88,6 +88,12 @@ public class SnowLayerBlock extends Block {
     protected boolean canSurvive(BlockState state, LevelReader world, BlockPos pos) {
         BlockState iblockdata1 = world.getBlockState(pos.below());
 
+        // Purpur start
+        if (iblockdata1.is(Blocks.BLUE_ICE) && !world.getWorldBorder().world.purpurConfig.snowOnBlueIce) {
+            return false;
+        }
+        // Purpur end
+
         return iblockdata1.is(BlockTags.SNOW_LAYER_CANNOT_SURVIVE_ON) ? false : (iblockdata1.is(BlockTags.SNOW_LAYER_CAN_SURVIVE_ON) ? true : Block.isFaceFull(iblockdata1.getCollisionShape(world, pos.below()), Direction.UP) || iblockdata1.is((Block) this) && (Integer) iblockdata1.getValue(SnowLayerBlock.LAYERS) == 8);
     }
 
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index 18ea922e71dc9de3e9eccac2d30c5f2776928a0b..cbf26d5f0a3d615883b17c65709d078c72c46bbf 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -975,9 +975,11 @@ public class PurpurWorldConfig {
 
     public boolean mobsSpawnOnPackedIce = true;
     public boolean mobsSpawnOnBlueIce = true;
+    public boolean snowOnBlueIce = true;
     private void iceSettings() {
         mobsSpawnOnPackedIce = getBoolean("blocks.packed_ice.allow-mob-spawns", mobsSpawnOnPackedIce);
         mobsSpawnOnBlueIce = getBoolean("blocks.blue_ice.allow-mob-spawns", mobsSpawnOnBlueIce);
+        snowOnBlueIce = getBoolean("blocks.blue_ice.allow-snow-formation", snowOnBlueIce);
     }
 
     public int lavaInfiniteRequiredSources = 2;