CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

I know it is not user friendly at all, but you really need to follow
what is described here:

http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Kernel_23/Chapter_main.html#Section_11.5

Your inheritance is not correct.

Sebastien.

On 05/09/2012 12:30 AM, Tomislav Maric wrote:
> 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