I'm having a problem generating streamlines. I'm following the
cookbook script and it works fine for the IsolatedGalaxy dataset,
but not for my own data (also Enzo). The error I'm getting is the
following:
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-20-d3a0fa7307d4> in <module>()
5 pos = c+pos_dx
6
----> 7 streamlines = Streamlines(pf,pos,'x-velocity', 'y-velocity', 'z-velocity', length=1.0
)
8 #streamlines = Streamlines(pf,pos,'x-velocity', 'y-velocity', 'z-velocity', length=pf.domain_width[0])
9 streamlines.integrate_through_volume()
/data/users/borm/YT/yt-x86_64/src/yt-hg/yt/visualization/streamlines.pyc in __init__(self, pf, positions, xfield, yfield, zfield, volume, dx, length, direction, get_magnitude)
102 volume = AMRKDTree(self.pf, fields=[self.xfield,self.yfield,self.zfield],
103 log_fields=[False,False,False])
--> 104 volume.join_parallel_trees()
105 self.volume = volume
106 if dx is None:
/data/users/borm/YT/yt-x86_64/src/yt-hg/yt/utilities/amr_kdtree/amr_kdtree.pyc in join_parallel_trees(self)
456 nid = np.array(nid)
457 new_tree = self.rebuild_tree_from_array(nid, pid, lid,
--> 458 rid, les, res, gid, splitdims, splitposs)
459
460 def get_node_arrays(self):
/data/users/borm/YT/yt-x86_64/src/yt-hg/yt/utilities/amr_kdtree/amr_kdtree.pyc in rebuild_tree_from_array(self, nids, pids, lids, rids, les, res, gids, splitdims, splitposs)
505 N = nids.shape[0]
506 for i in xrange(N):
--> 507 n = self.get_node(nids[i])
508 n.set_left_edge(les[i])
509 n.set_right_edge(res[i])
/data/users/borm/YT/yt-x86_64/src/yt-hg/yt/utilities/amr_kdtree/amr_kdtree.pyc in get_node(self, nodeid)
212 for depth in range(1,len(path)):
213 if path[depth] == '0':
--> 214 temp = temp.left
215 else:
216 temp = temp.right
AttributeError: 'NoneType' object has no attribute 'left'
I'm using yt 2.6, but I've also tried with yt 3.1 and I get the same
error there (only it takes much, much longer before it crashes?) My
datasets do not have particles, not sure if that may be relevant.