CGAL users discussion list

[Tapadi <>]

Hi,

Have you checked all conversions between inexact values (like double) and
exact values (like CGAL::gmpq)?

In particular, you should check that when you're importing inexact geometric
data from files, you must convert them into exact representation and then
only use this exact representation. Convert them back in inexact
representation *only* for display / export purposes.

I've already done this kind of mistake:

My_inexact_structure a = import_from_file("...")
CGAL::Exact_structure b = convert_to_exact(a)
CGAL::Exact_structure c = CGAL::apply_some_algorithm(b)
My_inexact_structure d = convert_to_inexact(c)
display(d)
CGAL::Exact_structure e = convert_to_exact(d) // Gives cgal assertion
violation or some indesirable stuff

I hope this advice to be helpful for solving your problem.
Regards,

Hugo Loi
PhD student at Inria - Maverick team



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