CGAL users discussion list

[msmith81 <>]

thanks! It appears that functors are just what I was looking for... but I am
too much of a newb to get them to work  I've never used functors before -
can someone with more c++ experience tell me what I am missing? I found 
this source
<http://www.stanford.edu/class/cs106l/course-reader/Ch13_Functors.pdf>   and
wrote a functor as:

class SphereFunction {
public:
        explicit SphereFunction(const FT sr) : squaredRadius(sr) {}
FT operator() (const Point& p)
        { return CGAL::squared_distance(p, 
Point(CGAL::ORIGIN))-squaredRadius; }
private:
        const FT squaredRadius;
};

I then tried calling this in the code as:

FT radius = 10.0;
SphereFunction sphere_function(radius*radius);
Mesh_domain domain(sphere_function, K::Sphere_3(CGAL::ORIGIN,
(radius*radius*2.0)));

but it doesn't compile because "cannot convert parameter 1 from
'SphereFunction' to 'Function (__cdecl &)' "
I suspect that the problem has a lot to do with these two typedef lines: 

typedef FT (Function)(const Point&);
typedef CGAL::Implicit_mesh_domain_3<Function,K> Mesh_domain;
        
but with my limited c++ knowledge, I just have no idea what to modify or how
to modify it. Can someone please help?



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