CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

You can compute the intersection of 4 spheres centered at your 4 points 
with radius being the distance to the points you are looking for.
Note that in general you have two such points (in degenerate cases you
can have a sphere, a circle or a single point).

You'll need to use the Spherical_kernel_3.

Have a look at:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Circular_kernel_3_ref/FunctionObjectConcept_SphericalKernel--Intersect_3.html#Cross_link_anchor_902
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Circular_kernel_3_ref/Class_Exact_spherical_kernel_3.html#Cross_link_anchor_863

Sebastien.

On 02/03/2012 08:54 AM, Adam wrote:
> Hello All !!!
>
> I’m new here and I lack knowledge so please bear with me.
> I have a problem. I have to calculate position of point in space having
> distance from 4 known points.
> Is it possible to calculate this position in use of CGAL library?
> If not, may be some knowledgeable users can point me in the right direction.
>
>
> Regards,
> Adam
>
>
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