CGAL users discussion list

[Yoann LE BARS <>]

Hello everybody out there!

        Thank you for your answer, Chris, and my apologies to have sent this
message to you alone rather to the list. I repost it.

Le 13/11/2018 à 17:31, Chris Marsh a écrit :
> I've never used the Qt functionality of CGAL, but I think you need to
> use just CGAL::draw(tri), as per
> https://doc.cgal.org/latest/Triangulation_2/Triangulation_2_2draw_triangulation_2_8cpp-example.html

        Well, it turned out CGAL version on Ubuntu has not been compiled with
“draw”. As it is one of the systems I have to support, I cannot use it.
Anyway, I am working on an application with an interface made with Qt,
therefore the visualisation should be embedded in the interface and I
have to use Qt. As a consequence, “draw” is not a good option in my case.

> I'm on MacOS and my Qt library through brew causes me nothing but
> problems, so it might be related to that.

        This is not the question, but I do not really understand why mac 
people
tend to prefer Homebrew to Macport. My tests show you have better
control with Macport, it is more coherent with a Unix system and you can
solve things more easily and more efficiently when something goes wrong.
Also, there are much more applications available in Macports.

        Anyway …

> Everything I've read over the years suggests the viz in cgal is for
> quick and dirty visualization.
> e.g.,
> http://cgal-discuss.949826.n4.nabble.com/Tutorial-for-visualisation-in-CGAL-using-QT-td4656057.html

        Then, it turns out I should use CGAL only for mesh manipulation and
computation, then something else for visualisation.

> Depending on what your needs are, you might want to consider writing to
> a format that is easily visualized in another software. If you're
> interested in visualizing simulation output, might I suggest writing to
> a Paraview (paraview.org <http://paraview.org>) format (vtu)? This
> approach has treated me very well. It's pretty straightforward format to
> write to (VTK library does the hard part), and Paraview is immensely
> useful for visualizing simulation outputs  and exploring a mesh. I can
> send you a paraview file that is an exported CGAL mesh if you're interested.

        Using Paraview does not seem a good option to me, as I need to do
several treatments either on my meshes or using my meshes.

        Paraview uses Vtk library, which can be embedded in Qt applications. 
It
may be a good way to do visualisation I need to do.

        However, I am interested in the code you use for visualisation with
Paraview.

        Moreover, I am interested on any information to use CGAL with Vtk.

        Best regards.

-- 
Yoann LE BARS
http://le-bars.net/yoann/
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