[vtk-developers] vtkGreedyTerrainDecimation; How to ignore a given input value

[jan kolar]

Hello, I would like to alter vtkGreedyTerrainDecimation class so that a
given value from the input raster DTM is omitted, i.e. never injected into
the triangulation / decimation process. I assume it could be as simple as
adding a single 'if' condition statement at the right place in the code.
Where the change should be made? Could anybody help me with this?  --Jan