[Algorithms] Smooth movement of camera along a path

[Mark W. <mwi...@cy...>]

I'm trying to write a fly-by sequence (similar to the Unreal
intro) for my 3d engine.  Can anyone tell me how to smoothly
move the camera along a set of predefined 3d points?
Ideally,  I would like a system where I manually move the
camera around the environment and record keyframes at
certain positions/orientations.  Then I would like the
system to automatically move the camera along a path
interpolated from these keyframes.  I'm guessing I need some
sort of spline or other curve to do the job?

-Mark