CGAL users discussion list

[Michael Balzer <>]

Hello,

i want to extract the Apollonius diagram from the Apollonius graph by 
using the function "draw_dual( Stream &str )" with a custom stream class.

When i implement the stream class with the required stream operators for 
 Segment_2, Line_2, and Ray_2, I get the following compiler error using 
MSVC (sorry for having german compiler messages, but I hope you get it 
anyway):



/////////////////////////////////////////////////////////////
C:\Programme\CGAL-3.3\include\CGAL\Hyperbola_segment_2.h(141) : error 
C2784: 'CGAL::Root_of_2<RT> CGAL::operator /(const CGAL::Root_of_2<RT> 
&,const CGAL::Root_of_2<RT> &)': Vorlagenargument für 'const 
CGAL::Root_of_2<RT_> &' von 'CGAL::Hyperbola_segment_2<Gt>::FT' konnte 
nicht hergeleitet werden
        with
        [
            Gt=CGAL::Agt2<CGAL::Cartesian<CGAL::MP_Float>>
        ]
        C:\Programme\CGAL-3.3\include\CGAL\Root_of_2.h(1307): Siehe 
Deklaration von 'CGAL::operator`/''
        C:\Programme\CGAL-3.3\include\CGAL\Hyperbola_segment_2.h(88): 
Bei der Kompilierung der Memberfunktion 'void 
CGAL::Hyperbola_segment_2<Gt>::generate_points(std::vector<_Ty> &) 
const' der Klassenvorlage
        with
        [
            Gt=CGAL::Agt2<CGAL::Cartesian<CGAL::MP_Float>>,

_Ty=CGAL::Hyperbola_2<CGAL::Agt2<CGAL::Cartesian<CGAL::MP_Float>>>::Point_2
        ]
        C:\Programme\CGAL-3.3\include\CGAL\Apollonius_graph_2.h(608): 
Siehe Verweis auf Instanziierung der kompilierten Klassenvorlage 
'CGAL::Hyperbola_segment_2<Gt>'
        with
        [
            Gt=CGAL::Agt2<CGAL::Cartesian<CGAL::MP_Float>>
        ]
        apolloniusgraph.cpp(24): Siehe Verweis auf Instanziierung der 
kompilierten Funktionsvorlage 'Stream 
&CGAL::Ag2<Gt>::draw_dual<Stream>(Stream &) const'
        with
        [
            Stream=Stream,
            Gt=CGAL::Agt2<CGAL::Cartesian<CGAL::MP_Float>>
        ]
/////////////////////////////////////////////////////////////


Now I'm not sure what I may have done wrong. The other parts of the code 
which use the same typedefs et cetera are working fine.

When I examine the code in "Apollonius_graph_2.h", which defines the 
function "draw_dual(...)", I notice that additionally Hyperbola_2, 
Hyperbola_segment_2, and Hyperbola_ray_2 try to access the stream. But 
defining additional stream operators for these primitives doesn't help.

Has someone an idea for this issue?


Thanks,
Michael :)