[vtkusers] Streamlines in unstructured grids

[Cook, Christopher B]

vtkusers:
I have an unstructured grid that contains two stacked hexahedrons that then join
into a single larger hexahedron (2 faces into 1 face). When I try to project
streamlines from the two hexs into the one, the streamlines stop at the face
boundary. Do I need to have a special boundary cell between the two? One
solution is to split the larger single cell into pyramids and align the faces,
but if I could avoid this added complexity, I would like to do so. I also found
that if a streamline intersects the vertex, now in the center of the bigger
cell, that also stops the streamline.

Thanks in advance,
Chris
	
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Christopher B. Cook
Pacific Northwest National Laboratory 
email: chris.cook at pnl.gov