CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 02/07/2012 06:47 PM, AdamMiller wrote:
> Hi
>
> is there any way I can make a point_3 or vector_3 from circular_arc_point_3?
> I cannot just use the access functions as they return a Root_of_2<NT>, which
> I can't use in the point or vector constructors.
Coordinates of Circular_arc_point_3 are algebraic numbers of degree 2,
so they don't fit exactly inside a Point_3 (which coordinates are 
rational numbers).

You get get an approximation by using the function CGAL::to_double on 
each coordinates.

Sebastien.

> thanks and regards,
>
> Adam Miller
>
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