That's pretty much what it does. (hence the eager anticipation of UpdateSubGraph()!)
However, 3000 points? thats nutso, are you making a film!?
If you post a bit more information about what you are trying to do we might be able to come up…
As far as i can tell, cameras don't have a byFunction update method (which is odd)
In order for a camera to be of any use to you though, you'd need to have an UpdateGraph() call in there, so you'd need to do it as a script transaction. (for the…