CGAL users discussion list

[Tomislav Maric <>]

Hi everyone,

I tried to inherit simply from the CGAL::Cartesian kernel and provide 
the functors that the Concept requires, instead of using filtered kernel 
(I don't get how this works, but I'm reading through it). Still, even 
after providing the functors, I get the same error again, when I'm 
trying to read the Polyhedron_3 from an .off file. Everything else 
works. The problematic Kernel_23 modified example is attached.

The OFF file scanner obviously expects a type R defined within the Point 
P. I don't see how I can provide this in any way from outside of the 
Point class. It's not trying to access R through a proxy, like a trait 
class, it asks for R directly.

Q1:

Does this mean that if I want to use my Point class, I need to write a 
specialization of the

template < class Point> inline
Point&
file_scan_vertex( File_scanner_OFF& scanner, Point& p)

for my Point? Is this the proper solution for this problem?


Q2:

Why are the point coordinates constructed using the RT  (Ring Type)?

p = Point( RT(x), RT(y), RT(z));

(it's the same for the homogeneous representation)


Thanks for the help!

Best regards,
Tomislav

Attachment: Kernel_23.tgz
Description: application/compressed-tar