CGAL users discussion list

[Thomas Holzmann <>]

On 01/04/2017 01:02 PM, Laurent Rineau (CGAL/GeometryFactory) wrote:
> Why do you think that precondition violation is related to the small code
> excerpt you show us?
I think it's related to that small code because before that the 
triangulation validity is checked. And when my debugger stepped over 
this area, the error appeared. However, as my debugger now does very 
weird things, I'm not sure about that anymore.
> That exception was triggered because there was a logic error in your code.
> Those checks are only applied if the macros CGAL_NDEBUG and NDEBUG are not
> defined. That is not related to the optimizations flags -O0, or -O3.
Ok, then it's strange that this error just happened with -O0 for me...
> Probably, the way you created the triangulation, or the way your split those
> cells invalidated invariant of the triangulation and make it invalid. You can
> check the value of `tr.is_valid(true)`, to be sure.
I didn't split anything before that error, and checked validity with 
is_valid(true).

However, I currently think that this error is not directly related to 
CGAL. So I'll continue debugging :-)

Thanks for the quick answer!

Thoams

--
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Dipl.-Ing. Thomas Holzmann
TU Graz - Institut fuer Maschinelles Sehen und Darstellen
Graz University of Technology - Institute for Computer Graphics & Vision
Inffeldgasse 16/II, 8010 Graz, Austria

http://www.icg.tugraz.at/
phone: +43 316 873 5091
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