[vtkusers] Scalar field data on polydata

Bill Lorensen wlorens1 at nycap.rr.com
Sat Mar 2 14:11:52 EST 2002


Nils,
There was an example in vtk3.x, combColorIso.tcl that generated an isosurface and then sampled another grid with the extracted isosurface.

If you can't find it, let me know and I send it to you,

Bill

At 06:26 PM 3/2/02 +0100, Nils H. Busch wrote:
>Hi,
>
>I would like to display/map  scalar data onto a polydata
>surface(generated from vtkMarchingCubes).
>I am reading in a vtkStructuredPoint set, extract the isosurface with
>vtkMarchingCubes and write the vtkPolyData to file. Now, I would like to
>read in another vtkStructuredPoint set and map that onto the polydata
>surface (probably needs to be tri-linearly interpolated ).
>I am not quite sure, where I should add this extra scalar field in my
>pipeline.
>Can I add a second scalar data set within vtkMarchingCubes, can I
>somehow project the scalar data onto the output polydata  or do I need
>to traverse the inner data structures of the respective vtk data sets
>and set some associated data array ?
>
>This has probably been done before, but I could not find any examples.
>Any references or hints greatky appreciated.
>
>--
>    Nils H. Busch
>    Max-Planck-Institute of Cognitive Neuroscience
>    phone:  ++49 (341) 9940-335 fax:  ++49 (341) 9940-204
>    e-mail: nilsb at cns.mpg.de
>
>
>
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