The Construct trick doesn't help here. When you send a list of values
to 'origin', you get a line of connected points.
Streamline requires a volumetric field to interpolate through.
I'm not sure why your original field isn't working, unless you don't
have volumetric elements (like tets, probably, if it's unstructured).
On Mar 10, 2006, at 9:47 AM, Thomas Geenen wrote:
Hi all,
it seems to be a bit quit in the forum....
I got a very basic question.
I try to get streamlines working for me and up till now it doesn't.
I got a 3D velocity field on an unstructured grid. I create glyph's
for it and
display it. so far so good. next I want to add streamlines so I
pass the same
data that I pass to autoglyph to streamlines. This results in an error
message saying that streamlines expects a 3D floating point vector
field. So
I make an explicit vector field by extracting th positions from the
field and
passing it to the origin part of a construct block. next I extract
the data
part and compute the velocity vectors explicitly again by computing
[a.0,
a.1, a.2] extract the data part and pass it to the data part of the
construct
block. However streamlines still complains about the field not
being a 3D
vector field. What else do I have to do to make streamlines happy??
tia
Thomas
