[vtkusers] How to use 'vtkCurvatures' class?
Amy Squillacote
ahs at cfdrc.com
Mon Oct 20 14:14:39 EDT 2008
vtkUnstructuredGridToPolyDataFilter is an abstract class; you can't
instantiate it. Instead, do one of the two things I described in my
previous email after the vtkThresholdFilter.
1) vtkGeometryFilter *geom = vtkGeometryFilter::New();
geom->SetInput(thresh->GetOutput());
maxMapper->SetInput(geom->GetOutput());
2) Replace vtkPolyDataMapper with vtkDataSetMapper, as shown below.
vtkDataSetMapper *mapper = vtkDataSetMapper::New();
mapper->SetInput(thresh->GetOutput());
actor->SetMapper(mapper);
- Amy
B. C. wrote:
> Hi,
> I used this:
>
> vtkCurvatures *curve = vtkCurvatures::New();
> curve->SetInput(cleaner->GetOutput());
> curve->SetCurvatureTypeToMaximum();
> curve->Update();
>
> vtkThreshold *thresh = vtkThreshold::New();
> thresh->SetInput(curve->GetOutput());
> thresh->ThresholdByUpper(0.5);
>
> vtkUnstructuredGridToPolyDataFilter *filtre;
> filtre->SetInput(thresh->GetOutput());
>
> vtkPolyDataMapper *maxMapper = vtkPolyDataMapper::New();
> maxMapper->SetInput(filtre->GetOutput());
>
> but, that does not work. The bug generated is in this line:
> filtre->SetInput(thresh->GetOutput());
>
> I don't know how to do!!!!
>
>
> --- En date de : *Lun 20.10.08, Amy Squillacote /<ahs at cfdrc.com>/* a
> écrit :
>
> De: Amy Squillacote <ahs at cfdrc.com>
> Objet: Re: [vtkusers] How to use 'vtkCurvatures' class?
> À: butterfly.1688 at yahoo.fr
> Cc: vtkusers at vtk.org
> Date: Lundi 20 Octobre 2008, 13h03
>
> Add a vtkGeometryFilter between vtkThreshold and vtkPolyDataMapper OR
> use a vtkDataSetMapper instead of the vtkPolyDataMapper (in which case
> vtkGeometryFilter is unneeded).
>
> - Amy
>
> B. C. wrote:
> > Hi Amy,
> > when i do what you told me, i have this error:
> > error C2664: 'SetInput' : cannot convert parameter 1 from
> 'class
> > vtkUnstructuredGrid *' to 'class vtkPolyData'
> > for the code line
> 'maxMapper->SetInput(thresh->GetOutput());'
> > It should be something else to add before this. Can you help me?
> >
> >
> > --- En date de : *Ven 17.10.08, Amy Squillacote /<ahs at cfdrc.com>/* a
>
> > écrit :
> >
> > De: Amy Squillacote <ahs at cfdrc.com>
> > Objet: Re: [vtkusers] How to use 'vtkCurvatures' class?
> > À: butterfly.1688 at yahoo.fr
> > Cc: vtkusers at vtk.org
> > Date: Vendredi 17 Octobre 2008, 20h12
> >
> > Put the vtkThreshold code after you set up vtkCurvatures (just below
> > your call to curve->Update()). Then change the input to maxMapper
> from
> > "curve->GetOutput()" to
> "thresh->GetOutput()".
> >
> > - Amy
> >
> > B. C. wrote:
> > > Thank you Amy.
> > > I post you the code i used:
> > >
> > > vtkCurvatures *curve = vtkCurvatures::New();
> > > curve->SetInput(cleaner->GetOutput());
> > > curve->SetCurvatureTypeToMaximum();
> > > curve->Update();
> > >
> > > vtkPolyDataMapper *maxMapper = vtkPolyDataMapper::New();
> > > maxMapper->SetInput(curve->GetOutput());
> > >
> > > vtkActor *maxCurve = vtkActor::New();
> > > maxCurve->SetMapper(maxMapper);
> > > maxCurve->SetPosition(0.0,0.0,0.0);
> > > myRender->AddActor(maxCurve);
> > > myRenderWindow->Render();
> > >
> > > Please, tell me where to add the code you sent to me to display
> the
> > > maximum curvatures>0.5
> > >
> > > Thank you for your help!!!
> > >
> > >
> > > --- En date de : *Ven 17.10.08, Amy Squillacote
> /<ahs at cfdrc.com>/* a
> >
> > > écrit :
> > >
> > > De: Amy Squillacote <ahs at cfdrc.com>
> > > Objet: Re: [vtkusers] How to use 'vtkCurvatures'
> class?
> > > À: butterfly.1688 at yahoo.fr
> > > Cc: vtkusers at vtk.org
> > > Date: Vendredi 17 Octobre 2008, 19h41
> > >
> > > You'll want to use vtkCurvatures with curvature type set
> to
> > maximum.
> > > Then pass the output of that filter to a vtkThreshold, using
> the
> > > ThresholdByUpper method to indicate the values to keep.
> Example c++
> > code
> > > is shown below.
> > >
> > > vtkCurvatures *curv = vtkCurvatures::New();
> > > curv->SetCurvatureTypeToMaximum();
> > >
> > > vtkThreshold *thresh = vtkThreshold::New();
> > > thresh->SetInputConnection(curv->GetOutputPort());
> > > thresh->ThresholdByUpper(0.5); // using the example value
> you
> > provided.
> > >
> > > Online documentation for vtkCurvatures is here:
> > > http://www.vtk.org/doc/nightly/html/classvtkCurvatures.html.
> > > Online documentation for vtkThreshold is here:
> > > http://www.vtk.org/doc/nightly/html/classvtkThreshold.html.
> > >
> > > - Amy
> > >
> > > B. C. wrote:
> > > > Please, i need your help to finish my work!!!
> > > > I use 'vtkCurvatures' to compute curvatures at
> each point
> > of my
> > > > polydata structure.
> > > > I want to save only the Maximum curvatures and display
> only those
> >
> > > > which are > some_value (0.5 for example).
> > > > Can someone tell me how to do this?
> > > > Please heeeeeeeeelp!!!
> > > >
> > > >
> > > > __________________________________________________
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> >
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> > >
> > > --
> > > Amy Squillacote Phone: (256) 726-4839
> > > Computer Scientist Fax: (256) 726-4806
> > > CFD Research Corporation Web: http://www.cfdrc.com
> > > 215 Wynn Drive, Suite 501
> > > Huntsville, AL 35805
> > >
> > >
> > >
> > >
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > En finir avec le spam? Yahoo! Mail vous offre la meilleure
> protection
> > > possible contre les messages non sollicités
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> >
> > --
> > Amy Squillacote Phone: (256) 726-4839
> > Computer Scientist Fax: (256) 726-4806
> > CFD Research Corporation Web: http://www.cfdrc.com
> > 215 Wynn Drive, Suite 501
> > Huntsville, AL 35805
> >
> >
> >
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > En finir avec le spam? Yahoo! Mail vous offre la meilleure protection
> > possible contre les messages non sollicités
> > http://mail.yahoo.fr Yahoo! Mail
>
> --
> Amy Squillacote Phone: (256) 726-4839
> Computer Scientist Fax: (256) 726-4806
> CFD Research Corporation Web: http://www.cfdrc.com
> 215 Wynn Drive, Suite 501
> Huntsville, AL 35805
>
>
>
>
>
> __________________________________________________
> Do You Yahoo!?
> En finir avec le spam? Yahoo! Mail vous offre la meilleure protection
> possible contre les messages non sollicités
> http://mail.yahoo.fr Yahoo! Mail
--
Amy Squillacote Phone: (256) 726-4839
Computer Scientist Fax: (256) 726-4806
CFD Research Corporation Web: http://www.cfdrc.com
215 Wynn Drive, Suite 501
Huntsville, AL 35805
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