[vtkusers] Problem using vtkAppendPolyData with vtkPolyDataToImageStencil

[David Netherway]

Hello, David,

Thanks.

David.

----- Original Message -----
From: "David Gobbi" <dgobbi at irus.rri.ca>
To: "David Netherway" <david.netherway at adelaide.edu.au>
Cc: "vtkusers" <vtkusers at public.kitware.com>
Sent: Wednesday, 15 May, 2002 1:59 PM
Subject: Re: [vtkusers] Problem using vtkAppendPolyData with
vtkPolyDataToImageStencil


> Hi David,
>
> The vtkPolyDataToImageStencil is only meant to work with closed,
> non-intersecting surfaces.  And even then there are roundoff errors
> in the code that can cause it to fail in certain situations.
>
>  - David
>
> On Wed, 15 May 2002, David Netherway wrote:
>
> > I made minor modifications to TestImageStencilWithPolyData.tcl to use an
> > appended polydata of two spheres. The blanked out region in the image
did
> > not match the expected union of the two spheres. See attached code. Is
> > vtkPolyDataToImageStencil supposed to work with appended data or should
one
> > have a pipeline processing each polydata at a time?
> >
> > I am using the CVS vtk4 download of 2 hous ago.
> >
> > Thanks, David
> >
> >
>