yes that puzzled me also. about the volumes, my dx files has this to say about
it
objects "elements"
class array
type int
rank 1
shape 8
items 34560
attribute "element type" string"cubes"
data follows
so unstructured cubes
how do i do a construct like trick to create volumes.
Maybe autogrid?
Thomas
On Saturday 11 March 2006 01:38, Chris Pelkie wrote:
> 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
