перемещение NibbleArray в Core

core/src/main/java/mc/core/utils/NibbleArray.java

@@ -0,0 +1,65 @@
+package mc.core.utils;
+
+import lombok.RequiredArgsConstructor;
+import mc.core.world.block.BlockLocation;
+
+/**
+ * Сжатый массив значений 0-15
+ */
+@RequiredArgsConstructor
+public class NibbleArray {
+    private final byte[] data;
+
+    public NibbleArray(int capacity) {
+        this.data = new byte[capacity];
+    }
+
+    public NibbleArray() {
+        this.data = new byte[2048];
+    }
+
+    private int coordsToIndex(int x, int y, int z) {
+        return y << 8 | z << 4 | x;
+    }
+
+    private int nibbleIndex(int index) {
+        return index >> 1;
+    }
+
+    private boolean isLowerNibble(int index) {
+        return (index & 1) == 0;
+    }
+
+    public int get(BlockLocation location) {
+        return get(location.getX(), location.getY(), location.getZ());
+    }
+
+    public int get(int x, int y, int z) {
+        final int idx = coordsToIndex(x, y, z);
+
+        final int ni = nibbleIndex(idx);
+        return isLowerNibble(idx) ? this.data[ni] & 0x0F : this.data[ni] >> 4 & 0x0F;
+    }
+
+    public void set(BlockLocation location, int value) {
+        set(location.getX(), location.getY(), location.getZ(), value);
+    }
+
+    public void set(int x, int y, int z, int value) {
+        if      (value <  0) value =  0;
+        else if (value > 15) value = 15;
+
+        final int idx = coordsToIndex(x, y, z);
+        final int ni = nibbleIndex(idx);
+
+        if (isLowerNibble(idx)) {
+            this.data[ni] = (byte)(value);
+        } else {
+            this.data[ni] = (byte)(this.data[ni] | value << 4);
+        }
+    }
+
+    public byte[] getRawData() {
+        return data;
+    }
+}