vtkMaskPoints bug?

[Gala'Vi and Liss @ Mainframe Country]

Hi,

I think there is a bug in vtkMaskPoints filter. It is supposed to do the
downsampling of a point set. It downsamples, all right, however it doesn't
produce any polydata. Here is the output of the vtkMaskPoints filter with
print self function.

 Debug: Off
 No Delete Method
 Modified Time: 1543
 Reference Count: 1
 Source: 0x1098b440
 Release Data: Off
 Data Released: False
 Global Release Data: Off
 Field Data:
   Debug: Off
   No Delete Method
   Modified Time: 1408
   Reference Count: 1
   Number Of Arrays: 0
   Number Of Components: 0
   Number Of Tuples: 0
 Number Of Points: 2868
 Number Of Cells: 0
 Cell Data:
   Debug: Off
   No Delete Method
   Modified Time: 1411
   Reference Count: 1
   Scalars: (none)
   Vectors: (none)
   Normals: (none)
   Texture Coordinates: (none)
   Tensors: (none)
   FieldData: (none)
   Copy Scalars: On
   Copy Vectors: On
   Copy Normals: On
   Copy Texture Coordinates: On
   Copy Tensors: On
   Copy FieldData: On
 Point Data:
   Debug: Off
   No Delete Method
   Modified Time: 1540
   Reference Count: 1
   Scalars:
     Debug: Off
     No Delete Method
     Modified Time: 1538
     Reference Count: 1
     Data: 0x1096f408
     Number Of Scalars: 2868
     Range: (-0.162383, 0.15367)
     LookupTable: (none)
     Number Of Components: 1
     Active Component: 0
   Vectors: (none)
   Normals: (none)
   Texture Coordinates: (none)
   Tensors: (none)
   FieldData: (none)
   Copy Scalars: On
   Copy Vectors: On
   Copy Normals: On
   Copy Texture Coordinates: On
   Copy Tensors: On
   Copy FieldData: On
 Bounds: 
   Xmin,Xmax: (0.307017, 0.780433)
   Ymin,Ymax: (0.313161, 0.712686)
   Zmin,Zmax: (0.318921, 0.683928)
 Compute Time: 1546
 Release Data: Off
 Number Of Points: 2868
 Point Coordinates: 0x1096f318
 Locator: 0x0
 Number Of Vertices: 0
 Number Of Lines: 0
 Number Of Polygons: 0
 Number Of Triangle Strips: 0

If you take the output of this filter and feed it through
another dataset to polydata filter then everything is o'k and you see your
output on the screen. I'm working with star formation particle clouds.

I can live with feeding the output to another filter before mapping,
however wouldn't this seem logical that if vtkMaskPoints is a dataset to
polydata and not a dataset to dataset filter, then it should produce some
decent polydata as the output. 





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