C++ library for "gridding"

[Rob Agar]

hi,

I have some elevation data in the form of a list of sampled points that 
I would like to convert into a regular grid.  Rather than writing my own 
code for doing this, I was wondering if there is a C++ library for doing 
this kind of transformation?  (eg does OGR do this?)

The data is comma separated longitude, latitude and elevation.

Any advice, pointers, links to tutorials etc much appreciated - I'm new 
to GIS, and the learning curve is steep!

cheers,
Rob