[vtkusers] How to use 'vtkCurvatures' class?

[B. C.]

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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-- 
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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