CGAL users discussion list

If I understand the question, then it boild down to how ro export and  
import numbers represented with the number type you are using, and  
that, of course, depends on the number type. Gmpq supports exposrting  
to and importing from an io-stream.

Quoting "Ben Supnik" 
<>:

> Hi Y'all,
>
> Does anyone have any advice on how to safely persist arrangements?   
> My arrangement is based on an exact number type and the combination  
> of a rather ugly pile of curves...it is very possible that some of  
> the intersections required to form the topologically correct map  
> cannot be represented with raw 64-bit floats.
>
> How can I write an arrangement out to disk such that I can both read  
> it back without redoing the intersection calculations and be sure  
> that it is topologically correct?
>
> thanks
> Ben
>
>
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