[vtkusers] Converting vtkPolyData to vtkStructuredPoints

[Bryn Lloyd]

Hi,

vtkDataSetToDataSetFilter is abstract, so you cannot create an instance 
of it:
http://www.vtk.org/doc/nightly/html/classvtkDataSetToDataSetFilter.html

Anyway, converting polydata to an image or similar is something that has 
been posted dozens of times on the mailing list. Is the polydata a 
surface? Is the surface closed? Usually you need to detect inside from 
outside (and distance) and sample your image/structured points like 
this. Search the archives...

/Bryn






Dimitris Perperidis wrote:
> Hi,
> 
> I am very new with VTK. I want to convert vtkPolyData to 
> vtkStructurePoints. I have written the following code (which I am not 
> sure will do the trick).
> vtkPolyData* input;
> vtkPolyDataReader* reader;
> vtkStructuredPoints* output_sd;
> vtkDataSetToDataSetFilter* filter;
> 
> input = vtkPolyData::New();
> reader = vtkPolyDataReader::New();
> filter = vtkDataSetToDataSetFilter::New();
> 
> reader->SetFileName(argv[1]);
> reader->Modified();
> 
> 
> input = reader->GetOutput();
> input->Modified();
> input->Update();
> 
> filter->SetInput(input);
> 
> filter->Modified();
> filter->Update();
> 
> output_sd = filter->GetStructuredPointsOutput();
> output_sd->Modified()
> 
> <http://davis.lbl.gov/Manuals/VTK-4.5/classvtkDataSetToDataSetFilter.html#a5>i 
> get the following compiling error:
> 44: error: invalid conversion from ‘vtkAlgorithm*’ to 
> ‘vtkDataSetToDataSetFilter*’ in the statement filter = 
> vtkDataSetToDataSetFilter::New();
> 
> 
> Any hints on the error and if I am in the right path will be greatly 
> appreciated.
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-- 
-------------------------------------------------
Bryn Lloyd
Computer Vision Laboratory
ETH Zürich, Sternwartstrasse 7
CH - 8092 Zürich, Switzerland
Tel: +41 44 63 26668
Fax: +41 44 63 21199
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