[vtkusers] Deleting pts, local triangulation?

[Terence Lim]

Hi Folks,

Is it possible to:

a) pick a point throught the opengl window,delete it from the mesh and have
then update the display to show the resultant mesh?

b) triangulate "locally", that is, if I had a mesh of 100,000 + pts and I
removed/added a point, is there a way in which I can re-triangulate only the
affected regions? or would I have to retriangulate the entire set of points?
If so, how do I implement this?

I am using Delaunay2D within the following pipeline:
vtkPoints->vtkPolyData->vtkDelaunay2D->vtkPolyDataMapper->vtkActor...

Any input on these matters would be greatly appreciated.

-Terence