it is done

core/src/mindustry/world/Pos.java

@@ -0,0 +1,21 @@
+package mindustry.world;
+
+/** Methods for a packed position 'struct', contained in an int. */
+public class Pos{
+    public static final int invalid = get(-1, -1);
+
+    /** Returns packed position from an x/y position. The values must be within short limits. */
+    public static int get(int x, int y){
+        return (((short)x) << 16) | (((short)y) & 0xFFFF);
+    }
+
+    /** Returns the x component of a position. */
+    public static short x(int pos){
+        return (short)(pos >>> 16);
+    }
+
+    /** Returns the y component of a position. */
+    public static short y(int pos){
+        return (short)(pos & 0xFFFF);
+    }
+}