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[Panagiotis Foteinos <>]

I am using the  CGAL::Filtered_kernel<CGAL::Cartesian<double> > kernel.

On Fri, Aug 28, 2009 at 5:27 PM, Ben Supnik <> wrote:

What Kernel are you using?

Panagiotis Foteinos wrote:

Hello everybody.

I observed something strange.

If a triangle t(p, q, r) is close to a degenerate one with the value, however, of the predicate t.is_degenerate() always being FALSE, then during the calculation of CGAL::squared_radius(p, q, r), the assertion:

********************************************************************************************
  terminate called after throwing an instance of 'CGAL::Assertion_exception'
 what():  CGAL ERROR: assertion violation!
Expr: ! CGAL_NTS is_zero(den)
File: /scratch/local/CGAL-3.4/include/CGAL/constructions/kernel_ftC2.h
Line: 60
********************************************************************************************

is trigerred, and the calculation fails.

Unfortunately, this error is difficult to be reproduced, but sometimes it happens.


Is this behavior expected? Is it relevant to the fact that the triangle is almost degenerate?


Thank you,
Panagiotis

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