[Paraview] Trouble making stream traces

[David C Thompson]

> Thanks for putting me on the right track.  I am outputting quadratic
> triangles from the code, but my code actually has quadratic
> quadrilaterals (the vtk format doesn't have a 9-noded quad), so I'm sure
> I've made some mistake in that connectivity code.  I didn't have this
> problem when I output 4 linear quads.
There is a 9-node quad, thanks to Soeren Gebbert:
http://www.vtk.org/doc/nightly/html/classvtkBiQuadraticQuad.html

	David