Magic Cube

      int newVector = rnd.nextInt(NUM_AXIS-1);

      // All three axis must be present among every four consecutive rotations.

      // Otherwise in case of odd-sized cubes we can get four consecutive rotations

      // that collapse to a NOP

      // (X,midLayer,180)->(Y,midLayer,180)->(X,midLayer,180)->(Y,midLayer,180) = NOP

      if( curr>=3 && scramble[curr-1][0]==scramble[curr-3][0] )

        {

        for( int ax=0; ax<NUM_AXIS; ax++)

          {

          if( scramble[curr-1][0]!=ax && scramble[curr-2][0]!=ax )

            {

            scramble[curr][0] = ax;

            break;

            }

          }

        }