[vtkusers] CW and CCW filtering

[David.Pont at ensisjv.com]

"Meisam Aliroteh" <meisam.aliroteh at gmail.com> wrote on 08/05/2007 09:31:58:

> Hi everyone,
>
> I was wondering if there is a vtk filter that can fix cell
> orientations. I have OBJ models that I load using vtkOBJReader, but
> the cell orientations are mixed. Some of the triangular faces are
> clockwise and some are counter-clockwise. I need a way to unify the
> orientation of all cells such that they all face clock-wise or
> counter-clockwise. By the way, my models are always built up of
> triangular patches (no strips or quads).
>
> Does anyone know how to do this ? !

vtkPolyDataNormals should do it.

  regards, Dave P

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