[vtkusers] duplicated vertex in marching cubes?

[Dominik Szczerba]

I will probably irritate Bill by repeating again that yes, I do 
(non-reproducibly :() use to get duplicate points from MC. To ensure 
robust results try to simply merge the duplicate points.

Bill Lorensen wrote:
> Please provide a small, complete example. MC should not generate
> duplicate points or vertices. What is the datatype of your scalars?
> 
> On Wed, Nov 11, 2009 at 10:20 AM, lucas Grijander
> <dev_crisalix at hotmail.com> wrote:
>> Hi all!
>> I am using vtkMarchingCubes to calculate a 3D mesh of a volume I have. Fist
>> I initialize the filter with:
>> vtkMarchingCubes* iso = vtkMarchingCubes::New();
>> iso->SetInput(object);
>> iso->SetValue(0,1); // Surface #0, iso-value=1
>> iso->Update();
>> then I fill the vtkStructuredPoints.
>> The problem I have is, as you can see in the pictures, when you have a close
>> look to the trianbles (screen2) you can see duplicated triangles and vertex,
>> and this is a huge problem for my application... I supposed vtkMarchingCubes
>> should generate a single surface mesh... I don't know if that's the reason,
>> but when I fill the vtkStructuredPoints I use
>> scalars->InsertValue(cnt, 0) ; and scalars->InsertValue(cnt, 128) ;
>> I took all these from an example, I still don't know what you have to set as
>> values, either 1 or 128... in addition the result change with this number
>> and I'm not sure why.
>> What should I use as values? and also why I have this "double" triangles
>> mesh?
>> thanks!
>> Jaime.
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