[vtkusers] vtkPlaneSource

[lisa hughes]

THANK YOU!
IT WORKED
!

Merci beaucoup!!
J'adore Montreal!

Lisa!!



>From: Simon DROUIN <sdrouin at bic.mni.mcgill.ca>
>To: lisa hughes <lost_bits1110 at hotmail.com>
>CC: vtkusers at vtk.org
>Subject: Re: [vtkusers] vtkPlaneSource
>Date: Fri, 20 Feb 2004 20:35:21 -0500
>
>Call:
>
>SetOfQuadCells->Update()
>
>before trying to get the number of cells. vtk applies a "lazy update"
>policy. This means that classes like vtkPlaneSource don't actually build
>the geometry until the pipeline they are part of is updated.
>
>-Simon
>
>
>On Sat, 21 Feb 2004, lisa hughes wrote:
>
> > Hello,
> > I have created a vtkPlaneSource object and want to access the quad cells
> > created by the plane source
> > But first i need to know the number of cells created
> > Isnt this just the XResolution times YResolution?? so in my case I 
>should
> > get 900 cells?  But the following code outputs 0 cells!! what is wrong 
>with
> > what im' doing?  Thanks,
> > Lisa
> >
> > vtkPlaneSource *ColorBlock = vtkPlaneSource::New();
> > ColorBlock->SetOrigin(0,0,0);
> > ColorBlock->SetPoint1(5,0.5,0);
> > ColorBlock->SetPoint2(0,5,0);
> > ColorBlock->SetResolution(30,30);
> > ColorBlock->SetNormal(0,1,0);
> >
> >
> > vtkPolyData *SetOfQuadCells = vtkPolyData::New();
> > SetOfQuadCells = ColorBlock->GetOutput();
> > cout<<SetOfQuadCells->GetNumberOfCells();
> >
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