CGAL users discussion list

[Mahmood NT <>]

Hi,
I have the following definitions for a polygon.
typedef Traits_                                         Traits_2;

 typedef typename Traits_2::Rat_kernel      Rat_kernel;

typedef typename Rat_kernel::Point_2       Rat_point_2;
typedef Polygon_2<Rat_kernel>                Rat_polygon_2;
std::list<Rat_point_2>                              vertices;

In a loop I will push back the points like this:
vertices.push_back (Rat_point_2 (x, y));

Then I define polygon:
Rat_polygon_2        pgn (vertices.begin(), vertices.end());

Now, when I want to use "CGAL::bounded_side_2" I get compilation error:
CGAL::bounded_side_2( vertices.begin(), vertices.end(), Rat_point_2 (1, 2), 
Rat_point_2() );

Why?  I have to say, I use CGAL 3.2. Does it matter?
I am looking for something like: "CGAL::bounded_side_2( pgn, Rat_point_2 (1, 
2) );" Is it possible?

the error message is:
include/CGAL/Polygon_2_algorithms.C: In function `CGAL::Bounded_side 
   CGAL::bounded_side_2(ForwardIterator, ForwardIterator, const Point&, const 
Traits&) [with ForwardIterator =
   std::_List_iterator<CGAL::Point_2<CGAL::Simple_cartesian<Rational> >, 
   CGAL::Point_2<CGAL::Simple_cartesian<Rational> >&, 
CGAL::Point_2<CGAL::Simple_cartesian<Rational>
   >*>, Point = Rat_point_2, Traits = Rat_point_2]':

VVc_demo.cpp:607:   instantiated from here
.../CGAL-3.2/include/CGAL/Polygon_2_algorithms.C:300: error: no type
   named `Compare_x_2' in `class Rat_point_2'
.../CGAL-3.2/include/CGAL/Polygon_2_algorithms.C:301: error: no type
   named `Compare_y_2' in `class Rat_point_2'
.../CGAL-3.2/include/CGAL/Polygon_2_algorithms.C:302: error: no type
   named `Orientation_2' in `class Rat_point_2'
VVc_demo.cpp:607:   instantiated from here
.../CGAL-3.2/include/CGAL/Polygon_2_algorithms.C:304: error: `
   compare_y_2' undeclared (first use this function)
.../CGAL-3.2/include/CGAL/Polygon_2_algorithms.C:304: error: (Each
   undeclared identifier is reported only once for each function it appears
   in.)
.../CGAL-3.2/include/CGAL/Polygon_2_algorithms.C:317: error: `
   compare_x_2' undeclared (first use this function)


Thanks,

Mahmood NT






      
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