Merge pull request andyzeng#18 from kevinzakka/python2-fix

added backwards compatibility for python2

Author: andyzeng

fusion.py

@@ -343,7 +343,7 @@ def rigid_transform(xyz, transform):
   """Applies a rigid transform to an (N, 3) pointcloud.
   """
   xyz_h = np.hstack([xyz, np.ones((len(xyz), 1), dtype=np.float32)])
-  xyz_t_h = (transform @ xyz_h.T).T
+  xyz_t_h = np.dot(transform, xyz_h.T).T
   return xyz_t_h[:, :3]