[vtkusers] Creating a simple triangle that can later be extruded using vtkLinearExtrusionfilter

[Elvis DOWSON]

Hi ,
        I'm trying to learn how to extrude polygons using
vtkLinearExtrusionFilter.

I took a look at the Build unstructured grid example, which builds a solid
triangle in 3D space. However, it
- seems to be a complicated method to create a simple triangle
- the vtkLinearExtrusionFilter does not accept objects of type
vtkUnstructuredGrid as its input.

( I have attached a TCl example that builds a simple triangle using an
unstructured grid, just for reference. )

Could someone please tell me how I can create a simple triangle in 3D space
and feed it to vtkLinearExtrusionFilter to extrude the triangle ?

Thanks !

Elvis John DOWSON
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