Linear Extrusion question

[Lisa S. Avila]

Hello Joseph,

Did you tell the mapper what the scalar range of your data is?

Lisa

At 06:08 PM 3/6/00 -0800, Joseph Toman wrote:


>I hope this is simple, and I'm just not doing something right. I need to
>extrude polygons in a vtkPolyData into volumes, and then paint the resultant
>cells (strips) according to a color table. Everything I've tried so far,
>which has been variations on this:
>
>...
>vtkScalars colors
>...
>vtkPolyData polydata
>   polydata SetPoints points
>   polydata SetPolys polys
>   [polydata GetCellData] SetScalars colors
>...
>
>vtkLinearExtrusionFilter extrude
>   extrude SetInput polydata
>[[extrude GetOutput] GetCellData] SetScalars colors
>
>
>has yielded white, white or white, which isn't even the color of the
>original polygon. Where in this should I be trying to set the scalar
>data for the extruded triangle strip data, or would I just be better
>off building the faces explicitly? I know the second option works, I'm
>just looking for a shortcut in using the extrusion filter.
>
>                                                 J. Toman
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