[vtkusers] filling a polygonal shape.

[lydia many]

Dear All
I have the following problem.
I have a image (vtkImageData) and I want to fill a plygonal shape inside the 
image by white color.
I searched for a filter in vtk but didn't find. I just found Fill triangle 
method in vtkImagesourceCanevas but in this case It dosn't fit to my needs
Can any one help??

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