More work on rotate method.

gprMax/cmds_geometry/fractal_box.py

@@ -53,6 +53,13 @@ class FractalBox(UserObjectGeometry):
         super().__init__(**kwargs)
         self.hash = '#fractal_box'
 
+    def rotate(self, axis, angle, origin=None):
+        pts = np.array([self.kwargs['p1'], self.kwargs['p2']])
+        rotation = UserObjectGeometry.rotate_2point_object
+        rot_pts = rotation(self, pts, axis, angle, origin)
+        self.kwargs['p1'] = tuple(rot_pts[0, :])
+        self.kwargs['p2'] = tuple(rot_pts[1, :])
+        
     def create(self, grid, uip):
         try:
             p1 = self.kwargs['p1']