CGAL users discussion list

["avanindra" <>]

I am putting some more information here:

Here is the call stack:

msvcr80d.dll!strlen(unsigned char * buf=0x0013ea98)  Line 81    Asm


msvcp80d.dll!std::basic_string<char,std::char_traits<char>,std::allocator<ch
ar> >::assign(const char * _Ptr=0x00000000)  Line 1042 + 0x9 bytes      C++
        
        
msvcp80d.dll!std::basic_string<char,std::char_traits<char>,std::allocator<ch
ar> >::basic_string<char,std::char_traits<char>,std::allocator<char> >(const
char * _Ptr=0x00000000)  Line 644       C++
        
        
DirectXDisplay.exe!CGAL::precondition_fail(const char * expr=0x004b8f44,
const char * file=0x004b8f70, int line=1406, const char * msg=0x00000000)
Line 138 + 0x17 bytes   C++
        
        
DirectXDisplay.exe!CGAL::DT3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<do
uble>
>,CGAL::TDS3<CGAL::TH_vb3<CGAL::T_vb3<CGAL::Filtered_kernel<CGAL::Simple_car
tesian<double> >,CGAL::TDS_vb3<void> >
>,CGAL::T_cb3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>
>,CGAL::TDS_cb3<void> > >
>::dual(CGAL::TDS3<CGAL::TH_vb3<CGAL::T_vb3<CGAL::Filtered_kernel<CGAL::Simp
le_cartesian<double> >,CGAL::TDS_vb3<void> >
>,CGAL::T_cb3<CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>
>,CGAL::TDS_cb3<void> > >::Cell_handle c={...})  Line 1406 + 0x33 bytes C++
        
        
DirectXDisplay.exe!SurfaceMesher_3::voronoiFilterMesher(char *
file_name=0x004b4bb0)  Line 202 + 0x27 bytes    C++
        
        
DirectXDisplay.exe!WinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ *
hPreviousInstance=0x00000000, char * lpcmdline=0x00161f51, int nCmdShow=1)
Line 259        C++
        
        
DirectXDisplay.exe!__tmainCRTStartup()  Line 578 + 0x35 bytes   C
        
        
DirectXDisplay.exe!WinMainCRTStartup()  Line 403        C




For the precondition_fail function, I checked the local value of the
parameters. For the last parameter const char* msg, the value is
0x00000000<Bad Ptr>.



-----Original Message-----
From: 

 
[mailto:]
 
Sent: Sunday, February 15, 2009 10:46 PM
To: 

Subject: [cgal-discuss] 0xC0000005: Access violation reading location

Hi,

I was trying to output the triangles generated through delaunay triangulator
in
DirectX. 

When I run the triangulation code as a console application, it runs fine and
but when I call the same code in DirectX c++, I get run time exception,

First-chance exception at 0x004ffb10 (msvcr80d.dll) in DirectXDisplay.exe:
0xC0000005: Access violation reading location 0x00000000.

The strange thing is exception is occuring  in the Delaunay triangulator,
while
evaluating the triangulation from list of Points. i.e. inside

Dt(P.begin(),P.end);

in above statement P is list of points.

I am currently using VS2005 and DirectX9 on Windows XP. 

Do I need to change any project setting while calling any method of CGAL in
directX code?

Please point out where am I doing the mistake.

Thanks
Avanindra 
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