[vtkusers] pipeline advice needed to model unstructured pressure data

[Paul Tait]

Hi

I'm designing a VTK app to display pressure data over time in oil wells

The data I have for each point is  x,y,z  and also for each point an array
of pressure data at monthly intervals over several years. The xyz data is
unstructured.

I'm thinking of displaying the wells as tubes and having a flat plane which
is colored according to pressure. I'd like to be able to use the keyboard or
mouse to cycle between the various periods to allow the user to see how the
pressure changes over time.

I'm currently trying to get the following filter to work

vtkPolyData -> vtkShepardMethod -> vtkImageToPolyDataFilter ->
vtkBandedPolyDataContourFilter -> vtkPolyDataMapper

I'm having difficulty understanding the vtkImageToPolyDataFilter step

Am I even in the right ball park

Please be harsh if necessary

Thanks Paul Tait