CGAL users discussion list

[Johan Verbert <>]

Hello Fernando,

The speed issue was compared to Cgal 3.3 compiled with the previous 
version of Visual Studio Express (2007 i think).
And in release mode everything, even a simple rectangle failed.

_SECURE_SCL=0 was defined everywhere  but _HAS_ITERATOR_DEBUGGING=0 not

Adding _HAS_ITERATOR_DEBUGGING=0 when compiling CGAL and the demo fixed 
everything!
I feel a little stupid now :)

thanks alot for the help!
Johan

Fernando Cacciola schreef:
> Hi Johan,
>
> > Hello All,
> >
> > I followed the instructions on
> > (http://acg.cs.tau.ac.il/cgal-at-tau/installing-cgal-and-related-programs-on-windows) 
> >
> > for using Cgal (3.3.1) with Visual Studio Express 2008 using boost
> > 1.35.00.  And it seems to work fine.
> >
> > However, if i compile and debug for example the straight skeleton demo
> > program, it seems a lot slower than it was previously.
> "Previously" is what compiler, cgal version, etc?
>
> > It takes more
> > than two minutes to calculate the inner skeleton for the complex5
> > polygon (Vista, Core2Duo 
> > ,
> >  2gig ram).
> I suppose you are using checked iterators and the secure scl right?
> Try defining _SECURE_SCL=0 and _HAS_ITERATOR_DEBUGGING=0, making sure 
> to do the same when building CGAL itself.
>
> > If I compile and run
> > in release mode it doesnt even want to calculate any skeleton.
> > ("Straight skeleton construction failed")
> *any* skeleton no matter which one, like within a simple rectangle?
>
> HTH
>
> Fernando Cacciola
> GeometryFactory


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