[vtkusers] vtkPolyData exported to OpenInventor

[Mathieu Malaterre]

Laurent,

	Please move vtkTriangleFilter at the end your pipeline.
	vtkIVWriter is written to take only triangles into account and not
*triangle strips*.

	So your filter should be:

  vtkContourFilter -> vtkDecimatePro ->
  vtkSmoothPolyDataFilter -> vtkPolyDataNormals -> vtkStripper ->
  vtkCleanPolyData -> vtkTriangleFilter -> vtkIVWriter


	Next time you should proceed step by step. For example, with your old
pipeline:

  vtkContourFilter -> vtkTriangleFilter -> vtkDecimatePro ->
  vtkSmoothPolyDataFilter -> vtkPolyDataNormals -> vtkStripper ->
vtkPolyDataWriter

*then* write a simple python script:

r = vtkPolyDataReader
w = vtkIVWriter

you'll see your file will be buggy.
Then try:

r = vtkPolyDataReader
clean = vtkCleanPolyData
w = vtkIVWriter

in order to remove all degenerate cells

r = vtkPolyDataReader
clean = vtkCleanPolyData
tf = vtkTriangleFilter
w = vtkIVWriter

in order to: first remove degenerate cells, *then* turn strips into
triangle (and not the contrary!)

HTH
mathieu

imho wrote:
> Hi all,
> 
> I have a vtkPolyData with these filters :
> vtkContourFilter -> vtkTriangleFilter -> vtkDecimatePro ->
> vtkSmoothPolyDataFilter -> vtkPolyDataNormals -> vtkStripper ->
> vtkCleanPolyData
> 
> I can export it to a OpenInventor (iv) file with the vtkIVWriter.
> I have updated my vtk version with the nightly release to fix some bugs
> in these class.
> 
> I'd like to use the MESH program http://mesh.epfl.ch/ to compute
> differences between two meshes.
> 
> This program said that my poly is: "empty (no faces)"
> 
> What can I do to fix this?
> Wich filter should I add in my pipeline to have faces?
> 
> Thanks
> 
> imho
> 
> 
> 
> 
> 
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-- 
Mathieu Malaterre
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