[vtkusers] Why are ther extra panels

[Jim Peterson]

Marc Jaspar wrote:
> I am extruding a structural shape (a W21x101 as an example) and, there 
> are extra triangular end panels displayed.
> I have capping on and off (as well) and they still show up.
> If I zoom in, the extra panels disappear.  Why?
> Other than that, it works fine.
>
Marc,
excuse my ignorance, but what kind of algorithm are you using to 
"extrude a structural shape"? and where would I find W21x101 as an 
example of such a shape? Also, what version of vtk are you using, on 
what platform using what language?

Thanks,
Jim