[vtkusers] Render a network

[Gib Bogle]

I'm thinking about using VTK to display and edit a 3D network, i.e. a collection 
of nodes and links.  Think of it as a 3D pipe network, in which pipe diameters 
vary (in fact it's a vascular network).  I am most interested in visualizing 
network connectivity, therefore showing the diameters is desirable but not 
essential.  The obvious way to represent a link is as a cylinder, but the number 
of links in this network could make the interactor run slowly.  A wireframe 
representation, on the other hand, is probably too minimal.  I would want to be 
able to pick links to remove, and also to create links.

I'd be interested to hear of any experience others have had with something like 
this.  Some code would be great, of course.  :-)

Gib