From bbf42d1af052415601e173e20edc66504638911b Mon Sep 17 00:00:00 2001
From: Julian Krings <juliankrings6@gmail.com>
Date: Sat, 17 Aug 2024 15:23:23 +0200
Subject: [PATCH] fix headless chunk offset

---
 .../volmit/iris/core/nms/v1_20_R3/Headless.java | 17 +++++++----------
 .../core/nms/v1_20_R3/mca/MCATerrainChunk.java  |  9 ---------
 2 files changed, 7 insertions(+), 19 deletions(-)

diff --git a/nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/Headless.java b/nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/Headless.java
index ab8706256..71572d0a1 100644
--- a/nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/Headless.java
+++ b/nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/Headless.java
@@ -40,6 +40,7 @@ import com.volmit.iris.util.mantle.MantleFlag;
 import com.volmit.iris.util.math.RNG;
 import com.volmit.iris.util.parallel.MultiBurst;
 import com.volmit.iris.util.scheduling.PrecisionStopwatch;
+import lombok.Getter;
 import net.minecraft.core.Holder;
 import net.minecraft.core.QuartPos;
 import net.minecraft.nbt.CompoundTag;
@@ -68,6 +69,8 @@ public class Headless implements IHeadless, LevelHeightAccessor {
     private final KMap<String, Holder<Biome>> customBiomes = new KMap<>();
     private final KMap<org.bukkit.block.Biome, Holder<Biome>> minecraftBiomes = new KMap<>();
     private final RNG BIOME_RNG;
+    private final @Getter int minBuildHeight;
+    private final @Getter int height;
     private boolean closed = false;
 
     public Headless(NMSBinding binding, Engine engine) {
@@ -75,6 +78,8 @@ public class Headless implements IHeadless, LevelHeightAccessor {
         this.engine = engine;
         this.storage = new RegionFileStorage(new File(engine.getWorld().worldFolder(), "region").toPath(), true);
         this.BIOME_RNG = new RNG(engine.getSeedManager().getBiome());
+        this.minBuildHeight = engine.getDimension().getMinHeight();
+        this.height = engine.getDimension().getMaxHeight() - minBuildHeight;
         engine.getWorld().headless(this);
 
         var dimKey = engine.getDimension().getLoadKey();
@@ -107,6 +112,8 @@ public class Headless implements IHeadless, LevelHeightAccessor {
     @Override
     public boolean exists(int x, int z) {
         if (closed) return false;
+        if (engine.getWorld().hasRealWorld() && engine.getWorld().realWorld().isChunkLoaded(x, z))
+            return true;
         try {
             CompoundTag tag = storage.read(new ChunkPos(x, z));
             return tag != null && !"empty".equals(tag.getString("Status"));
@@ -270,14 +277,4 @@ public class Headless implements IHeadless, LevelHeightAccessor {
             minecraftBiomes.clear();
         }
     }
-
-    @Override
-    public int getHeight() {
-        return engine.getHeight();
-    }
-
-    @Override
-    public int getMinBuildHeight() {
-        return engine.getMinHeight();
-    }
 }
diff --git a/nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/mca/MCATerrainChunk.java b/nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/mca/MCATerrainChunk.java
index 8c6adc3f4..55a5c8fca 100644
--- a/nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/mca/MCATerrainChunk.java
+++ b/nms/v1_20_R3/src/main/java/com/volmit/iris/core/nms/v1_20_R3/mca/MCATerrainChunk.java
@@ -60,8 +60,6 @@ public record MCATerrainChunk(ChunkAccess chunk) implements TerrainChunk {
 
     @Override
     public void setBiome(int x, int y, int z, Biome bio) {
-        if (y < 0) return;
-        y += getMinHeight();
         if (y > getMaxHeight()) return;
         chunk.setBiome(x & 15, y, z & 15, CraftBiome.bukkitToMinecraftHolder(bio));
     }
@@ -82,10 +80,6 @@ public record MCATerrainChunk(ChunkAccess chunk) implements TerrainChunk {
 
     @Override
     public void setBlock(int x, int y, int z, BlockData blockData) {
-        if (y < 0) return;
-        y += getMinHeight();
-        if (y > getMaxHeight()) return;
-
         if (blockData == null) {
             Iris.error("NULL BD");
         }
@@ -97,9 +91,6 @@ public record MCATerrainChunk(ChunkAccess chunk) implements TerrainChunk {
     }
 
     private BlockState getBlockState(int x, int y, int z) {
-        if (y < 0) {
-            y = 0;
-        }
         y += getMinHeight();
         if (y > getMaxHeight()) {
             y = getMaxHeight();