[vtkusers] surface expansion

[David Gobbi]

I don't know of any example that does specifically what you want.
But the pipeline would go something like this:

1) use vtkPolyDataNormals to compute normals at each point.

2) feed the output of vtkPolyDataNormals into vtkWarpVector.

3) tell vtkWarpVector to use the normals, and give it a scale factor:

warp.SetInputConnection(norms.GetOutputPort())

warp.SetInputArrayToProcess(0, 0, 0,
  vtkDataObject.FIELD_ASSOCIATION_POINTS,
  vtkDataSetAttributes.NORMALS)

warp.SetScaleFactor(5.0)

I've never actually tried this, but in theory, it should work.

 - David
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