[vtk-developers] Surface

[Bill Lorensen]

Paulo,

To summarize:
vtkMarchingCubes -> vtkTriangleFilter -> vtkDecimatePro ( for each piece).
vtkCleanPolydata -> vtkWindowedSincPolyDataFilter ->vtkPolydataNormals
-> vtkStripper (after joining all pieces).
and for vtkDecimatePro use these options:
BoundaryVertexDeletionOff()
SplittingOff().
and for efficiency, vtkMarchingCubes should use these:
ComputeScalarsOff()
ComputeGradientsOff()
ComputeNormalsOff()

I suggest you submit an article to the VTK Journal:
http://www.midasjournal.org/?journal=35

Others will benefit from your experience. You could describe your
inital approach and how the suggestions helped to create a success.

Bill


On Thu, Feb 24, 2011 at 1:24 PM, totonixsame at gmail.com
<totonixsame at gmail.com> wrote:
> On Thu, Feb 24, 2011 at 3:09 PM, Bill Lorensen <bill.lorensen at gmail.com> wrote:
>> Paulo,
>>
>> I would run the vtkWindowedSincPolyDataFilter on the final result.
>>
>> Can you summarize what changes you made?
>>
>> Bill
>
> Hi Bill,
>
> We used the following pipeline in each vtkimagedata piece: vtkMarching
> -> vtkTriangleFilter -> vtkDecimatePro ->
> vtkWindowedSincPolyDataFilter. And after joining all pieces we used:
> vtkCleanPolydata -> vtkPolydataNormals -> vtkStripper
>
> But in the junctions there are some holes [1].
>
> Then I tried using vtkWindowedSincPolyDataFilter after joining all
> pieces. So the pipeline becomes:
>
> vtkMarching -> vtkTriangleFilter -> vtkDecimatePro ( for each piece).
>
> vtkCleanPolydata -> vtkWindowedSincPolyDataFilter ->
> vtkPolydataNormals -> vtkStripper (after joining all pieces).
>
> Ah, vtkDecimatePro is used with that parameters you suggested.
>
> Thanks!
>
> Thiago Franco de Moraes.
>
> [1] - http://i.imgur.com/6fa9t.png (Those blue lines are holes)
>