2D Stream Tracer does not follow glyphs

[Kbhansson (Kaelan)]

I’ve got some 2D rectilinear data, see attached (1.6 MB).

There are a couple variables in here concerning the gradient of some function. I’d like to make stream traces of this gradient function. In the attache data I am using the grad_norm variable for everything. Now, I can use the surface LIC and the Glyph filter in Paraview to get something that looks correct, but the stream traces seem to be using other data, and I am not sure where that data is coming from. (The stream lines are the gaussian points)

Does anyone have an idea what is happening?

(For reference, I get the same result in PyVista, so this is likely a VTK bug/issue/user error)

Running on the March 25th nightly build.

[Kenneth_Moreland]

It looks like there is a bug with stream tracing data with “pixel” type of cells (which come from 2D uniform and rectilinear data).

You should be able to work around the bug by first running the Extract Surface filter to convert the pixel cells to quad cells.

[Kbhansson (Kaelan)]

Cool, many thanks.

Should create an issue anywhere in the VTK repo?