[vtkusers] Re: Re: vtkProgrammableGlyphFilter problem

[reyes mauricio]

  Hi,
       The problem still persists after trying what you recommend me Malcolm 
(add a translation to the transform filter). I only get one single sphere as 
output of vtkProgrammableGlyphFilter.
        Does the vtkProgrammableGlyphFilter duplicate the source data at 
each point by itself, or do I have to perform that task?

   thanks in advance,
     Mauricio

>
>Hi
>
>You need to add a translation to your transform - by the point's x,y,z.
>Currently you're just scaling by the same amount every time at the origin,
>so it looks like one glyph.
>
>HTH
>Malcolm
>
>----- Original Message -----
>From: "reyes mauricio" <mreyesa at hotmail.com>
>To: <vtkusers at vtk.org>
>Sent: Monday, January 31, 2005 6:36 PM
>Subject: [vtkusers] vtkProgrammableGlyphFilter problem
>
>
> > Hi VTK Users,
> >
> >     I'm using vtkProgrammableGlyphFilter to manipulate individually (via
> > setGlyphMethod) scaling and orientation of spheres.
> >
> >    I cannot make the filter to work, it only gives me one single sphere 
>as
> > output
> >
> >   ( vtkGlyph3D works well wit the input data I pass. It copy the sphere 
>at
> > different positions, but I need to scale them and orient them
>differently )
> >
> > Thanks in advance,
> >    Mauricio
> >
> > this is part of my code:
> >
> >
> > // ********* part of code ************
> >
> >     vtkSphereSource *sphere=vtkSphereSource::New();
> >     vtkProgrammableGlyphFilter 
>*pfilter=vtkProgrammableGlyphFilter::New();
> >     pfilter->SetSource(sphere->GetOutput());
> >     pfilter->SetInput(pd);       <-------- pd (vtkPolyData)
> >     pfilter->SetGlyphMethod(func,(void *)pfilter);
> >
> >    vtkPolyDataMapper *glyphMapper=vtkPolyDataMapper::New();
> >    glyphMapper->SetInput(pfilter->GetOutput());
> >
> >    vtkActor *glyphActor=vtkActor::New();
> >    glyphActor->SetMapper(glyphMapper);
> >
> > for the moment the function passed to SetGlyphMethod just scales:
> >
> > void static func(void *arg)
> > {
> >    vtkProgrammableGlyphFilter *pfilter=(vtkProgrammableGlyphFilter*)arg;
> >
> >   //float point[3];
> >   //pfilter->GetPoint(point);
> >
> >   vtkTransform *tr=vtkTransform::New();
> >    tr->Scale(4,1,1); // testing
> >
> >    vtkTransformPolyDataFilter *pdf=vtkTransformPolyDataFilter::New();
> >    pdf->SetInput(pfilter->GetSource());
> >    pdf->SetTransform(tr);
> >
> >    tr->Delete();
> >    pdf->Delete();
> >
> > }

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