Fixed: reverse().

src/main/java/pl/wat/ms4ds/terrain/GeomUtils.java

@@ -859,7 +859,9 @@ public class GeomUtils {
         int mid = vertices.length / 2;
         int last = vertices.length - 1;
         for (int i = 0; i < mid; i++) {
+            Coord.Grid swap = vertices[i];
             vertices[i] = vertices[last - i];
+            vertices[last - i] = swap;
         }
         return vertices;
     }
@@ -871,8 +873,7 @@ public class GeomUtils {
     public static Coord.Grid srodekOdcinka(int x1, int y1, int x2, int y2) {
         int xsr = (x1 + x2) / 2;
         int ysr = (y1 + y2) / 2;
-        Coord.Grid srodek = new Coord.Grid(xsr, ysr);
+        return new Coord.Grid(xsr, ysr);
-        return srodek;
     }
 
     /**
@@ -916,6 +917,9 @@ public class GeomUtils {
     // =====================================================================
 
     public static void main(String[] args) {
+        Coord.Grid[] tab = {new Coord.Grid(0, 0), new Coord.Grid(1, 1), new Coord.Grid(2, 2), new Coord.Grid(4, 4), new Coord.Grid(5, 5)};
+
+        tab = reverse(tab);
         int se = sector(0, 0);
         int sek = sector(0, 9);
         sek = sector(2, 6);