[vtkusers] Getting the mesh information from a vtkPolyData

[Wendel Silva]

Hello everyone,

I have a vtkPolyData and I wanna to get its mesh. From the instance I have,
Im able to get the normals, texture coordinates and the index of the
triangles but, Im not able to get the vertices.
The TCoord and Normals I found inside the PointData. The vectors in the
PointData is None. Inside the GetPolygons I was only able to get the index
of the triangles.


My code is currently simple (python):

cylinder = vtk.vtkCylinderSource()
> ...
> triangulate = vtk.vtkTriangleFilter()
> triangulate.SetInputConnection(cylinder.GetOutputPort(0))
> triangulate.Update()
> polydata = triangulate.GetOutput(0)
>


Im also calling the methods Render() and Initialize() of the
vtkRenderWindowInteractor before getting the information from the polydata.
The window with my visualization shows me my code isnt wrong. How can I get
the vertices of the Cylinder(PolyData)?

Thanks

Wendel B Silva



ps.: When I print the PolyData I get the following information:
>
> vtkPolyData (0x2d46000)
>   Debug: Off
>   Modified Time: 1509
>   Reference Count: 2
>   Registered Events: (none)
>   Source: (none)
>   Information: 0x2d433f0
>   Data Released: False
>   Global Release Data: Off
>   UpdateTime: 1510
>   Release Data: Off
>   UpdateExtent: Not Initialized
>   Update Number Of Pieces: 1
>   Update Piece: 0
>   Update Ghost Level: 0
>   MaximumNumberOfPieces: 1
>   RequestExactExtent: Off
>    Field Data:
>     Debug: Off
>     Modified Time: 1374
>     Reference Count: 1
>     Registered Events: (none)
>     Number Of Arrays: 0
>     Number Of Components: 0
>     Number Of Tuples: 0
>   Number Of Points: 20
>   Number Of Cells: 16
>   Cell Data:
>     Debug: Off
>     Modified Time: 1382
>     Reference Count: 1
>     Registered Events: (none)
>     Number Of Arrays: 0
>     Number Of Components: 0
>     Number Of Tuples: 0
>     Copy Tuple Flags: ( 1 1 1 1 1 0 1 1 )
>     Interpolate Flags: ( 1 1 1 1 1 0 0 1 )
>     Pass Through Flags: ( 1 1 1 1 1 1 1 1 )
>     Scalars: (none)
>     Vectors: (none)
>     Normals: (none)
>     TCoords: (none)
>     Tensors: (none)
>     GlobalIds: (none)
>     PedigreeIds: (none)
>     EdgeFlag: (none)
>   Point Data:
>     Debug: Off
>     Modified Time: 1509
>     Reference Count: 2
>     Registered Events: (none)
>     Number Of Arrays: 2
>     Array 0 name = Normals
>     Array 1 name = TCoords
>     Number Of Components: 5
>     Number Of Tuples: 20
>     Copy Tuple Flags: ( 1 1 1 1 1 0 1 1 )
>     Interpolate Flags: ( 1 1 1 1 1 0 0 1 )
>     Pass Through Flags: ( 1 1 1 1 1 1 1 1 )
>     Scalars: (none)
>     Vectors: (none)
>     Normals:
>       Debug: Off
>       Modified Time: 1346
>       Reference Count: 2
>       Registered Events: (none)
>       Name: Normals
>       Data type: float
>       Size: 60
>       MaxId: 59
>       NumberOfComponents: 3
>       Information: 0
>       Name: Normals
>       Number Of Components: 3
>       Number Of Tuples: 20
>       Size: 60
>       MaxId: 59
>       LookupTable: (none)
>       Array: 0x2d47fe0
>   Bounds:
>     Xmin,Xmax: (-0.161803, 0.2)
>     Ymin,Ymax: (-0.2, 0.2)
>     Zmin,Zmax: (-0.190211, 0.190211)
>   Compute Time: 1540
>   Number Of Points: 20
>   Point Coordinates: 0x2d47720
>   Locator: 0
>   Number Of Vertices: 0
>   Number Of Lines: 0
>   Number Of Polygons: 16
>   Number Of Triangle Strips: 0
>   Number Of Pieces: 1
>   Piece: 0
>   Ghost Level: 0
>
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