[vtkusers] triangle strip and normals in vtk file

[John Biddiscombe]

> 1.  How can you specify a valid normal for a point - in a triangle strip
> it will be (posibly, unless coplanar) 2 different values depending on
> which triangle is associated with the node?

Unles I'm mitaken its the average of all the face normals that use the
point.

> 2. why do you need normals at all, aren't they implied by the winding
> order of the triangle strip?

???

JB