[vtkusers] How can i view the edges inside an UnstructuredGrid?

[Yasser Bashir]

Hi Longfei,
 
I need to understand a few things about your code before i can help you.  What is the input image type.  Is your image binary?  i.e. are there only two kinds of voxel values in the image?
 
Is the output of the connector filter a 3D Image?  Have you verified the output of the connector filter to be correct.
 
I think once you answer these questions, you will know the solution yourself.  in either case let me know how it goes.
 
Yasser

Longfei Cong <lfcong at nlpr.ia.ac.cn> wrote:

Hi Yasser Bashir£¬

 Thank a millon for your help .

I used vtkClipVolume filter to genrerate a tetrahedral mesh .but there some problems.I seem that there are no meshs generated.

 clip->SetInput(connector->GetOutput()); 

clip->SetValue(200);

 clip->Update();
cout<<clip->GetClippedOutput();

The output in the screen is in the accessory. the code is code.exe.

Wish you can help me.

Best regards

 

  
 
Hi Longfei,
 
You can use the vtkClipVolume filter to genrerate a tetrahedral mesh from an image in voxel space.  The output will be an unstructuredgrid with tetrahedral cells.
 

vtkImageData* image = importer->GetOutput();

//VTK convert image to unstructured grid i.e. tetrahedrons.

cout << "\nClipping Volume"; 

clip = vtkClipVolume::New();

clip->SetInput(image); 

clip->SetValue(0);

clip->Update();

 

 

If this doesnt work for you, try vtkDelaunay3D.

 

Hope this helps.

 

Yasser.

 

-----Original Message-----
From: Longfei Cong [mailto:lfcong at nlpr.ia.ac.cn] 
Sent: Thursday, March 04, 2004 12:54 AM
To: Yasser Bashir
Subject: Re: [vtkusers] How can i view the edges inside an UnstructuredGrid?



Hi Yasser Bashir£¬

 I am a beginer of VTk. Could you please help me with tetrahedral mesh generation and give some example about tetrahedral mesh generation. Thanks a lot!
 Best regards!
Hi,
 
Does any one know a way to display edges inside an unstrucutred grid when viewing it in the wireframe mode?
 
I know i can extract edges and make them display separately but that makes the scene very heavy.. 
 
Any help will be greatly appreciated.

Yasser



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> ATTACHMENT part 2 application/octet-stream name=out.bmp


> ATTACHMENT part 3 application/octet-stream name=code.exe


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