CGAL users discussion list

[Biswajit Biswas <>]

Sir   Fabri ;

I have a  query to you. Could you give me, a little clue that what is the basic difference between the  Simple_cartesian<double> kernel and Exact_predicates_inexact_constructions_kernel ? Who is better and why? I have seen that your comments are very helpful to learn not only coding but also the theory of computational geometry. It is my own opinion.

Thank you

Biswajit, Ph.D. student

Dept. CSE, Calcutta University, India.

On Mon, Jan 29, 2018 at 11:11 PM, Andreas Fabri <> wrote:

Hello,

When you use Simple_cartesian<double> or Exact_predicates_inexact_constructions_kernel there is no problem.

If you use Exact_predicates_exact_constructions_kernel you
have a problem, if a constructed point is in more than
one mesh.

Andreas

On 1/29/2018 6:34 PM, Riedel, Torge wrote:

HI Sebastian,

ok, this sounds like a limitation. Is Surface_Mesh a kernel without filtered constructions and reference counting?
Or maybe I misunderstood you.

Best regards
Torge

-----Ursprüngliche Nachricht-----
Von: [mailto:] Im
Auftrag von Sebastien Loriot (GeometryFactory)
Gesendet: Montag, 29. Januar 2018 17:57
An:
Betreff: Re: [cgal-discuss] Multithreading support

If you use a kernel without filtered constructions or reference counting, then
you shouldn't have a problem provided mesh A and mesh B are different.

Sebastien.

On 01/29/2018 05:47 PM, Riedel, Torge wrote:

Hi,

one more question: Is CGAL multithreading safe? To be more precise:
Can I operate in one thread on mesh A and operate in another thread on
mesh B? Sure I will need sync-objects when operating on the same mesh.
But is it safe to operate on different objects without any problems in
different threads?

Thank you very much.

Torge


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CENIT AG, Industriestrasse 52-54, 70565 Stuttgart, Tel.: +49 711 7825-30, Fax: +49 711 7825-4000, Internet: www.cenit.com
Geschaeftsstellen: Berlin, Frankfurt, Hamburg, Hannover, Muenchen, Oelsnitz, Ratingen, Saarbruecken
Vorstandsmitglieder: Kurt Bengel, Matthias Schmidt
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Chief Officer, GeometryFactory
Editor, The CGAL Project

phone: +33.492.954.912    skype: andreas.fabri

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thanks and regards 

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