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<P>Hi.</P>
<P>I'm working with the following classes:</P>
<P>vtkContourFilter, vtkCleanPolyData, vtkPolyDataConnectivityFilter, vtkPolyData and vtkStripper</P>
<P>to variate the size and form of some contours over an image. </P>
<P>The contours can be modified manually (by user interaction through a slider) or automaticaaly (from code, after executing a particular algorithm). </P>
<P>When I see the results of this modification (using vtkPolyDataMapper and vtkActor), they seem right. But when I extract the points to verify they don't correspond to what I'm visualizing. The weirdest is that this only happens when the modification is done form code. If it is done manually points from PolyData correspond to visualization. </P>
<P>What could this be?</P>
<P>Thanks in advance.</P>
<P><BR>Maria Alejandra Zuluaga V. </P>
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