[vtkusers] Wrong/Strange result from vtkImplicitPolyDataDistance + vtkSampleFunction

[Jorge Perez]

http://vtk.org/Bug/view.php?id=15003

Attached is a test code (Bug_ImplicitPolyDataDistance_01.tcl) to reproduce
a bug with a combination of vtkImplicitPolyDataDistance + vtkSampleFunction.

In this test a triangle mesh of only one connected component is set as
input to vtkImplicitPolyDataDistance then an implicit function is sampled
with vtkSampleFunction. The result is contoured with vtkImageMarchingCubes
and the vtkPolyData resulting from this last step shows more than one
connected component. The original component is reconstructed well but other
wrong components appear.

Attached is also the snapshot of the result.

The input mesh fix_mesh.vtk used in the test can be downloaded from
https://www.dropbox.com/s/x3iwjvyl56sxvs3/fix_mesh.vtk?dl=0

The test has been executed on release 6.1.

Any suggestion about how to fix that? Could it be due to wrong in the test
code?

best regards,

Jorge
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