добавлены методы (де)комперессии для XYZ координат

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

@@ -20,4 +20,23 @@ public class CompactedCoords {
                 (int)(short) (compactValue | 0xFFFF0000)
         };
     }
+
+    private static int floor_double(double value) {
+        int i = (int)value;
+        return value < (double)i ? i - 1 : i;
+    }
+
+    public static long compressXYZ(double x, double y, double z) {
+        return ((floor_double(x) & 0x3FFFFFF) << 38)
+                | ((floor_double(y) & 0xFFF) << 26)
+                | (floor_double(z) & 0x3FFFFFF);
+    }
+
+    public static double[] uncompressXYZ(long compactValue) {
+        return new double[]{
+                compactValue >> 38,
+                (compactValue >> 26) & 0x0FFF,
+                compactValue << 38 >> 38 // is normal?
+        };
+    }
 }