fix weird black spots in the world

Author: FalsePattern

src/main/java/com/falsepattern/lumi/internal/ArrayHelper.java

@@ -26,8 +26,17 @@
 
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import net.minecraft.world.chunk.NibbleArray;
 
 public class ArrayHelper {
+    public static boolean isEmpty(@Nullable NibbleArray arr) {
+        if (arr == null) {
+            return true;
+        }
+        return isZero(arr.data);
+    }
     @Contract(pure = true)
     public static boolean isZero(byte @NotNull [] arr) {
         for (int i = 0; i < arr.length; i++) {

src/main/java/com/falsepattern/lumi/internal/mixin/mixins/common/ExtendedBlockStorageMixin.java

@@ -24,6 +24,7 @@
 
 package com.falsepattern.lumi.internal.mixin.mixins.common;
 
+import com.falsepattern.lumi.internal.ArrayHelper;
 import lombok.val;
 import net.minecraft.world.EnumSkyBlock;
 import net.minecraft.world.chunk.NibbleArray;
@@ -189,26 +190,12 @@ public boolean isEmpty() {
             return false;
 
         if (lumi$isDirty) {
-            val blockLightEqual = lumi$checkLightArrayEqual(blocklightArray, EnumSkyBlock.Block);
-            val skyLightEqual = lumi$checkLightArrayEqual(skylightArray, EnumSkyBlock.Sky);
-            lumi$isTrivial = blockLightEqual && skyLightEqual;
+            val blockLightEmpty = ArrayHelper.isEmpty(blocklightArray);
+            val skyLightEmpty = ArrayHelper.isEmpty(skylightArray);
+            lumi$isTrivial = blockLightEmpty && skyLightEmpty;
             lumi$isDirty = false;
         }
 
         return lumi$isTrivial;
     }
-
-    @Unique
-    private boolean lumi$checkLightArrayEqual(NibbleArray storage, EnumSkyBlock baseLightType) {
-        if (storage == null)
-            return true;
-
-        val expectedValue = (byte) baseLightType.defaultLightValue;
-        val data = storage.data;
-        for (val value : data)
-            if (value != expectedValue)
-                return false;
-
-        return true;
-    }
 }