From d06657e2ffcfb8d486a525333524ff0fdf00b957 Mon Sep 17 00:00:00 2001
From: Daniel Mills <danielmillst@gmail.com>
Date: Thu, 22 Jul 2021 20:49:00 -0400
Subject: [PATCH] Zero write detection?

---
 .../volmit/iris/engine/data/mca/Chunk.java    | 14 +++++++++++++
 .../volmit/iris/engine/data/mca/Section.java  | 13 ++++++++++++
 .../framework/EngineCompositeGenerator.java   |  6 ++++++
 .../iris/engine/lighting/LightingCube.java    |  1 +
 .../volmit/iris/util/data/NibbleArray.java    | 21 ++++++++++---------
 5 files changed, 45 insertions(+), 10 deletions(-)

diff --git a/src/main/java/com/volmit/iris/engine/data/mca/Chunk.java b/src/main/java/com/volmit/iris/engine/data/mca/Chunk.java
index 5574c9fbe..52684ddc4 100644
--- a/src/main/java/com/volmit/iris/engine/data/mca/Chunk.java
+++ b/src/main/java/com/volmit/iris/engine/data/mca/Chunk.java
@@ -32,6 +32,7 @@ import static com.volmit.iris.engine.data.mca.LoadFlags.*;
 
 public class Chunk {
 
+    public transient int writes = 0;
     public static final int DEFAULT_DATA_VERSION = 1628;
 
     private boolean partial;
@@ -327,6 +328,7 @@ public class Chunk {
             sections.set(sectionIndex, section);
         }
         section.setBlockStateAt(blockX, blockY, blockZ, state, cleanup);
+        writes++;
     }
 
     /**
@@ -689,4 +691,16 @@ public class Chunk {
     public int sectionCount() {
         return sections.length();
     }
+
+    public void runLighting() {
+        for(int s = 15; s >= 0; s--)
+        {
+            Section section = getSection(s);
+
+            if(section != null)
+            {
+                section.runLighting();
+            }
+        }
+    }
 }
diff --git a/src/main/java/com/volmit/iris/engine/data/mca/Section.java b/src/main/java/com/volmit/iris/engine/data/mca/Section.java
index 89c3750d1..b8c4924e0 100644
--- a/src/main/java/com/volmit/iris/engine/data/mca/Section.java
+++ b/src/main/java/com/volmit/iris/engine/data/mca/Section.java
@@ -107,6 +107,19 @@ public class Section {
         return null;
     }
 
+    public void runLighting() {
+        for(int x = 1; x < 14; x++)
+        {
+            for(int z = 1; z < 14; z++)
+            {
+                for(int y = 0; y < 16; y++)
+                {
+
+                }
+            }
+        }
+    }
+
     @SuppressWarnings("ClassCanBeRecord")
     private static class PaletteIndex {
 
diff --git a/src/main/java/com/volmit/iris/engine/framework/EngineCompositeGenerator.java b/src/main/java/com/volmit/iris/engine/framework/EngineCompositeGenerator.java
index 2ac6d4a9c..a80acc634 100644
--- a/src/main/java/com/volmit/iris/engine/framework/EngineCompositeGenerator.java
+++ b/src/main/java/com/volmit/iris/engine/framework/EngineCompositeGenerator.java
@@ -34,6 +34,7 @@ import com.volmit.iris.engine.data.mca.NBTWorld;
 import com.volmit.iris.engine.data.nbt.tag.CompoundTag;
 import com.volmit.iris.engine.headless.HeadlessGenerator;
 import com.volmit.iris.engine.hunk.Hunk;
+import com.volmit.iris.engine.lighting.LightingChunk;
 import com.volmit.iris.engine.object.IrisBiome;
 import com.volmit.iris.engine.object.IrisDimension;
 import com.volmit.iris.engine.object.IrisPosition;
@@ -546,6 +547,11 @@ public class EngineCompositeGenerator extends ChunkGenerator implements IrisAcce
                     .injector((xx, yy, zz, biomeBase) -> chunk.setBiomeAt(ox + xx, yy, oz + zz,
                             INMS.get().getTrueBiomeBaseId(biomeBase)))
                     .build()).run();
+
+            if(chunk.writes == 0)
+            {
+                Iris.error("Chunk " + x + " " + z + " has 0 writes?");
+            }
         }
 
         catch(Throwable e)
diff --git a/src/main/java/com/volmit/iris/engine/lighting/LightingCube.java b/src/main/java/com/volmit/iris/engine/lighting/LightingCube.java
index 5dc25d054..7434baf78 100644
--- a/src/main/java/com/volmit/iris/engine/lighting/LightingCube.java
+++ b/src/main/java/com/volmit/iris/engine/lighting/LightingCube.java
@@ -24,6 +24,7 @@ import com.bergerkiller.bukkit.common.wrappers.BlockData;
 import com.bergerkiller.bukkit.common.wrappers.ChunkSection;
 import com.bergerkiller.generated.net.minecraft.server.NibbleArrayHandle;
 import com.volmit.iris.Iris;
+import com.volmit.iris.util.data.NibbleArray;
 
 import java.util.concurrent.CompletableFuture;
 
diff --git a/src/main/java/com/volmit/iris/util/data/NibbleArray.java b/src/main/java/com/volmit/iris/util/data/NibbleArray.java
index a33f80f1a..52da2e825 100644
--- a/src/main/java/com/volmit/iris/util/data/NibbleArray.java
+++ b/src/main/java/com/volmit/iris/util/data/NibbleArray.java
@@ -100,21 +100,22 @@ public class NibbleArray implements Writable {
         }
     }
 
-    public byte getAsync(int index) {
-        int bitIndex = index * depth;
-        int byteIndex = bitIndex >> 3;
-        int bitInByte = bitIndex & 7;
-        int value = data[byteIndex] >> bitInByte;
+    public byte get(int x, int y, int z)
+    {
+        return get(index(x,y,z));
+    }
 
-        if (bitInByte + depth > 8) {
-            value |= data[byteIndex + 1] << bitInByte;
-        }
-
-        return (byte) (value & mask);
+    public int index(int x, int y, int z) {
+        return y << 8 | z << 4 | x;
     }
 
     private transient int bitIndex, byteIndex, bitInByte;
 
+    public void set(int x, int y, int z, int nibble)
+    {
+        set(index(x,y,z), nibble);
+    }
+
     public void set(int index, int nibble) {
         set(index, (byte) nibble);
     }