[vtkusers] Re: Extract vertices from polydata

[John Platt]

Hi Goodwin,

Thanks for your idea. The polydata contains both lines and vertices. I
would like to extract the vertices for glyphing. I had a look at
vtkMaskPolyData but it appears you can't select a cell type. For VTK 4.4
I wrote a filter vtkProgrammableExtractCells to do this but in moving up
to 5 I'm trying to avoid the 'specials'.

Thanks again for your interest.

John.

-----Original Message-----
From: vtkusers-bounces+jcplatt=dsl.pipex.com at vtk.org
[mailto:vtkusers-bounces+jcplatt=dsl.pipex.com at vtk.org] On Behalf Of
Goodwin Lawlor
Sent: 22 January 2008 00:35
To: vtkusers at public.kitware.com
Subject: [vtkusers] Re: Extract vertices from polydata

John Platt wrote:
> Hi,  
> 
> Is there a filter to extract all the vertices (or other cell type)
from 
> vtkPolyData without resorting to Id lists or scalar data?

Hi John,

Have a look at vtkMaskPoints and its GenerateVerticesOn method. Set the 
OnRatio var to 1...

hth

Goodwin

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