CGAL users discussion list

["[cristo]" <>]

Hello all,

While trying to understand how the 2D and 3D Kernel works I found that Point_2 and Point_3 clases do not allow to modify its coordinates, so if I want to move a Point I would have to do something like:

  typedef CGAL::Cartesian<double>   K;
  typedef K::Point_2              Point_2;
  typedef K::Vector_2              Vector_2;

  Point_2  my_Point(0,0);
  Vector_2 d(1,2);

 
my_point = my_point + d;

According to the documentation, + and - operators return a Point obtained by translating the point my_point by the vector d. Regarding this behaviour I have the following questions:


 - Each time the +,- operators are used a new Point is created?
 - Searching through cgal's source code I couldn't find the implementation of this operators, but I found that some clases have what the comments on the code itself calls a "reference count" to "reduce time when making copies". How does this work?

Thanks in advance