[vtkusers] Smoothing

[Ted Vu]

Hi Malcolm
Thanks kindly for your help
Have you by any chance used this class before?

What I did was I set the input of vtkCellDataToPointData class to the 
PolyData which contained the cells that I was color mapping originally.  
Then I get the new output using the vtkCellDataToPolyData class object  as 
follows:

CellToPointData->SetInput(SetOfQuadCells);
NewPolyDataCellsUsingPointData = CellToPointData->GetPolyDataOutput();

But this seems to not associate any scalar data at all because i just get a 
white parallellogram. I also  removed the line where it says 
Mapper->SetScalarModeToUseCellData (but with or without this, it still gives 
the same output)

I also tried with and without 'PassCellDataOn();'

is there anything else i'm overlooking?
thanks so much


>From: "Malcolm Drummond" <malcolm at geovision.co.za>
>To: "Ted Vu" <lost_bits1110 at hotmail.com>
>Subject: Re: [vtkusers] Smoothing
>Date: Wed, 25 Feb 2004 18:57:23 +0200
>
>Hi Ted
>
>I assume you're using cell-data. You can get a blended effect by using
>point-data instead. vtkCellDataToPointData will do the conversion for you.
>
>HTH
>Malcolm
>
>----- Original Message -----
>From: "Ted Vu" <lost_bits1110 at hotmail.com>
>To: <vtkusers at vtk.org>
>Sent: Wednesday, February 25, 2004 5:48 PM
>Subject: [vtkusers] Smoothing
>
>
> > Good morning
> >
> > I have a vtkPolyData (one big parallelogram) which consists of many
> > parallelograms (I got this from vtkPlaneSource) and I have color coded
>each
> > of the cells to some color corresponding to a scalar
> >
> > But this looks very 'pixelated'
> > I cannot increase teh number of cells/resolution (i.e the number of
>smaller
> > parallelograms in my big parallelogram) becaus this significantly 
>reduces
> > speed etc..
> >
> > So I tried using vtkSmoothPolyDataFilter by doing teh following:
> >
> >        Smoother = vtkSmoothPolyDataFilter::New();
> > Smoother->SetNumberOfIterations(100);
> > Smoother->FeatureEdgeSmoothingOn();
> > Smoother->SetInput(myPolyData->GetOutput());
> >
> > but this makes absolutely no difference
> >
> > I also treid teh same with Smoother =
>vtkWindowedSincPolyDataFilter::New();
> >
> > So how can I sort of 'blur' all these parallelograms so it doesnt look 
>so
> > pixelated?
> >
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