Very little. It must be a valid velocity field - eg. have 3-D positions, elements (cubes or tets), and vectors, or 2-D positions, elements (triangles or quads) and vectors. If so, you can simply send it in to the first input of Streamline. Without any other specifications, the streamline will start at the centerpoint of the vector field and proceed from there. Pass its result into Image. For more info, you could first pass the result of streamline through AutoColor and it'll get the default color map indicating the magnitude of the velocity at each point along the streamline. Collecting the output of streamline with maybe ShowBox of the vector field before Image might be better. Pass the Streamline through Tube or, if the curl of the vector field is interesting, Ribbon would also be good. You can specify a non-default starting point several ways, such as a vector interactor or a Probe. Past this, the options become endless.
Greg
"Frederick R. Phelan Jr."
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Streamline Module
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07/03/2002 09:31 AM
Please respond to
opendx-users
Simple question . . . if I have some 3-D velocity data, what kind of
manipulation do I need to do to send it through the streamline module and
view the streamlines? Assume simple grid.
Thanks.
Frederick R. Phelan Jr., Ph.D.
Multiphase Materials Group
Polymers Division
National Institute of Standards and Technology
NIST, Bldg. 224/Rm. B108
100 Bureau Dr., STOP 8543
Gaithersburg, MD 20899-8543
301.975.6761 (VOX)
301.975.4932 (FAX)
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http://www.nist.gov/frederick_phelan
