[vtkusers] vtkDelaunay2D example

[Dominik Szczerba]

Well I just compiled and run the code you posted. There is nothing I can
send you. On execution it says:

input numPts= 16
output numPts= 16
output numCells= 18
output numPolys= 18
output numLines= 0
output numVerts= 0
Triangulation has 4 unconnected points
ERROR: Triangulation has 4 unconnected points

I did not debug any further (the thing is purely ambitional for me)

- Dominik

Sylvain Jaume wrote:
> Hi Dominik,
> 
> TestDelaunay2D passed on every tested platforms on the dashboard:
> http://www.vtk.org/Testing/Dashboard/20070826-0300-Nightly/TestDetail/__Graphics_Testing_Cxx_TestDelaunay2D.html
> 
> 
> Do you a have a test case that fails with vtkDelaunay2D? If yes, could
> you send your data to me and I will try to reproduce your case.
> 
> Sincerely,
> Sylvain
> 
> 
> Dominik Szczerba wrote:
>> I tried the Delaunay example out of curiosity (I use the great qhull for
>> years) and I am sorry to report it does not work (at least the test
>> itself says the test is not passed). My experience with the VTK 3-D
>> Delaunay has not been a very succesful one either.
>>
>> I have worked out how to use qhull in C++ (qhull is a very special
>> programming style...) and tested it extensively for a few years. I would
>> be ready to share my experience, unfortunately I have no time to
>> implement it as a VTK algorithm. Anyone to collaborate?
>>
>> - Dominik
>>
>> Sylvain Jaume wrote:
>>> Hi Daniela,
>>>
>>> Example of vtkDelaunay2D can be found here:
>>> http://public.kitware.com/cgi-bin/viewcvs.cgi/*checkout*/Graphics/Testing/Cxx/TestDelaunay2D.cxx?root=VTK&content-type=text/plain
>>>
>>>
>>>
>>> The output is a vtkPolyData. So you need vtkPolyDataMapper, not
>>> vtkDataSetMapper.
>>>
>>> HTH,
>>> Sylvain
>>>
>>> Daniela Castelluccia wrote:
>>>>  Hi Sylvain,
>>>> I'm trying with vtkDelaunay2D ( which makes triangles ) usign the
>>>> BoundaryTriangulation method:
>>>>
>>>> vtkFeatureEdges feature
>>>> feature SetInput originalPolydata
>>>> feature BoundaryEdgesOn
>>>> feature FeatureEdgesOff
>>>> feature NonManifoldEdgesOff
>>>> feature ManifoldEdgesOff
>>>>
>>>>
>>>> vtkDelaunay2D del
>>>> #vtkDelaunay3D del
>>>>     del SetInput [feature GetOutput]
>>>>     del BoundingTriangulationOn
>>>>     del SetTolerance 0.001
>>>>     del SetAlpha10.0
>>>>
>>>> vtkDataSetMapper map
>>>>     map SetInput [del GetOutput]
>>>>  
>>>> vtkActor triangulation
>>>>     triangulation SetMapper map
>>>>     [triangulation GetProperty] SetColor 1.0 0.49 0.25
>>>>  
>>>> #vtkPolyDataMapper mapper
>>>> #mapper SetInput originalPolydata
>>>> #vtkActor original
>>>> #    original SetMapper mapper
>>>> #   [original GetProperty] SetColor 1.0 0.0 0.0
>>>>
>>>> vtkRenderer ren1
>>>> vtkRenderWindow renWin
>>>>     renWin AddRenderer ren1
>>>> vtkRenderWindowInteractor iren
>>>>     iren SetRenderWindow renWin
>>>>
>>>>
>>>> ren1 AddActor triangulation
>>>> #ren1 AddActor original
>>>> ren1 SetBackground 1 1 1
>>>> renWin SetSize 900 900
>>>> renWin Render
>>>>
>>>> wm withdraw .
>>>>
>>>>
>>>> How can I set the right parameters for Delaunay trinagulation?
>>>> Have you some examples?
>>>>  
>>>>
>>>>
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-- 
Dominik Szczerba, Ph.D.
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi