CGAL users discussion list

[mriem <>]

Hello

I was looking into the CGAL intersections utilities at 

http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Kernel_23_ref/Function_intersection.html

and I could not find a segment_3 sphere intersection.

I have tried to implement the example code from that page


#include <CGAL/intersections.h>

void foo(CGAL::Segment_2<Kernel> seg, CGAL::Line_2<Kernel> line)
{
    CGAL::Object result = CGAL::intersection(seg, line);
    if (const CGAL::Point_2<Kernel> *ipoint =
CGAL::object_cast<CGAL::Point_2&lt;Kernel> >(&result)) {
        // handle the point intersection case with *ipoint.
    } else
        if (const CGAL::Segment_2<Kernel> *iseg =
CGAL::object_cast<CGAL::Segment_2&lt;Kernel> >(&result)) {
            // handle the segment intersection case with *iseg.
        } else {
            // handle the no intersection case.
        }
}

changing function arguments 

seg to type 

CGAL::Segment_3<Kernel> 

and line to 
CGAL::Sphere_3<Kernel> 

but the linker complains there is no such specialization for that templated
function.

Can I do segment_3 to sphere intersection?

Thank you very much.

Miguel Oliveira

PS: in fact, for this particular case, I only needed a do_intersect
functionality, but I think that if a do_intersect exists, so will the
intersect.





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