[Paraview] Tin creation from Vrml PointSet Cloud

[Roberto Angeletti]

MessageAxel,

after ParaView 1.6 installation, I miss vtkDelaunay2D and 3D filters.
I have copied the "Extensions" dir from old 1.4 dir, and I set again the
PV_INTERFACE_PATH.

...I obtained the Delaunay items in Filters menu, but they are grey (inactive).

I wronged something ?
Do you have tested Delaunay on 1.6, also ?


Very Best Regards (and thank you in advance for help)

Roberto Angeletti
  ----- Original Message ----- 
  From: Axel Steuwer 
  To: 'Roberto Angeletti' 
  Cc: paraview at paraview.org 
  Sent: Friday, June 25, 2004 1:29 PM
  Subject: [Paraview] Tin creation from Vrml PointSet Cloud


  Hi,

  I may be able to help you a little bit. First, you have to let paraview know that 
  you want to use the vtkDelaunay2D or 3D filter. This is done permanently (there are 
  some instances in the mailing list where people talk about this) for example 
  by creating a xml-file with the content (below) in a directory called e.g. "extensions"
  in your paraview installation directory. Then you have to point the environment
  variable PV_INTERFACE_PATH to that file location. If you only want to use this
  filter sporadically, then I think it is enough to "import package" the xml-file.
  This should make the filter available in paraview (given the right data format, I think).
  I am not sure what the structure of your VRML point cloud is, I use polydata such as this example

  # vtk DataFile Version 2.0
  Example data
  ASCII 
  DATASET POLYDATA
  POINTS 1000 float
  11.71441 -0.29446 -0.06840
  11.51223 -0.26540 -0.00054
  11.31058 -0.24298 0.00603
  11.10758 -0.28167 0.00724
  10.90453 -0.27109 0.00207
  .....


  and it works fine for me. If you consult the vtk description of the Delaunay filter, that might help.
  You can then play around with the parameters in the usual way.
  Alternatively, I sometimes use MayaVi, where you simply enter vtkDelaunay2D in the 
  UserDefined Filter window pop-up. Worth trying. 

  Hope that helps.

  Axel

  ------------------------------------------------------------------------------put this in your xml file------------------------
  <ModuleInterfaces>
  <Module name="Delaunay3D" root_name="Delaunay3D" module_type="Filter">
    <Filter class="vtkDelaunay3D">
       <Input name="Input" class="vtkPointSet"/>
    </Filter>
    <InputMenu label="Input" help="Delaunay Triangulation"/>
    <VectorEntry variable="Tolerance" trace_name="Tolerance" type="float" help="The tolerance" default_value="0.001" data_range="0. 10.0"/>
    <VectorEntry variable="Alpha" trace_name="Alpha" type="float" help="The Alpha value" default_value="2.0" data_range="0. 10.0"/>
    <VectorEntry variable="Offset" trace_name="Offset" type="float" help="The Offset value" default_value="2.5" data_range="0. 10.0"/>
    <LabeledToggle variable="BoundingTriangulation" trace_name="BoundingTriangulation" help="controls whether bounding 
    triangulation points (and associated triangles) are included in the output" default_value="0"/>
  </Module>
  <Module name="Delaunay2D" root_name="Delaunay2D" module_type="Filter">
    <Filter class="vtkDelaunay2D">
       <Input name="Input" class="vtkPointSet"/>
    </Filter>
    <InputMenu label="Input" help="Delaunay Triangulation"/>
    <VectorEntry variable="Tolerance" trace_name="Tolerance" type="float" help="The tolerance" default_value="0.001" data_range="0. 10.0"/>
    <VectorEntry variable="Alpha" trace_name="Alpha" type="float" help="The Alpha value" default_value="2.0" data_range="0. 10.0"/>
    <VectorEntry variable="Offset" trace_name="Offset" type="float" help="The Offset value" default_value="2.5" data_range="0. 10.0"/>
    <LabeledToggle variable="BoundingTriangulation" trace_name="BoundingTriangulation" help="controls whether bounding 
    triangulation points (and associated triangles) are included in the output" default_value="0"/>
  </Module>
  </ModuleInterfaces>

  --------------------------------------------------------------------------------------------------------------------------------------


    -----Original Message-----
    From: paraview-bounces at paraview.org [mailto:paraview-bounces at paraview.org] On Behalf Of Roberto Angeletti
    Sent: 25 June 2004 13:02
    To: paraview at paraview.org
    Subject: [Paraview] Tin creation from Vrml PointSet Cloud


    I need to perform a Delaunay triangulation on my Vrml PointSet Cloud Data,
    to obtain a Tin surface.
    What are the steps to do this with ParaView ?

    Best Regards

    Roberto Angeletti
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