CGAL users discussion list

[Nico Schlömer <>]

Hi everyone,

I'd like to put a custom function into a Function_vector without the FT_to_point_function_wrapper. (Can't use it because I it needs a function pointer and I only have a function pointer to a member function, which is different [1].) Unfortunately, I'm getting tangled up between all the typedefs. I tried

```

template <typename FT, typename P>

class Function: public std::unary_function<P, FT>

{

  typedef P Point;

}

template <typename FT, typename P>

class MySphere: public MyFun

{

public:

  FT operator()(P p) const

  {

    return p.x()*p.x() + p.y()*p.y() + p.z()*p.z() - 1.0;

  }

};

```

with

```

typedef CGAL::Implicit_multi_domain_to_labeling_function_wrapper<Function>

                                                        Function_wrapper;

typedef Function_wrapper::Function_vector Function_vector;

```

and

```

  // Define functions

  MySphere<K::FT, K::Point_3> f1;

  Function_vector v;

  v.push_back(f1);

```

but this only gets me tons of errors, virtually impossible to debug. Any hints here?

Cheers,

Nico

[1] https://isocpp.org/wiki/faq/pointers-to-members#fnptr-vs-memfnptr-types