CGAL users discussion list

Hi,

I'm trying to find arrangements of great arcs on the surface of the
sphere.  I'd like to use the 2D arrangements package to solve this, but
I'm not sure what's the right way to go about it.  At first I thought
I'd map a hemisphere to a plane, treating the z-coordinate as the
homogeneous coordinate, but for that I need lines, not line segments.

The only other thing I can think of is projecting the great arcs on one
hemisphere onto a plane, resulting in conic arcs.  But it seems to me
that this is more work and less elegant than the other solution.

So, I guess my questions are:
1. Is there an easy way to use the 2D arrangements package to get the
arrangements of lines (not segments) on the plane?

2. If the answer to 1 is no, is there another easy way to solve the
problem?

CGAL and computational geometry in general are very new to me, so please
let me know if I'm missing something obvious.

Thanks,

Anye Li