CGAL users discussion list

[Efi Fogel <>]

Hi Ronald,

There is no immediate way to handle all three types at the same time.

You need to define an appropriate instance of the Arrangement_2<Geom_traits, Dcel=...> class template.

There is no immediate geometry traits that handle all 3 types at the same.

You can use the Arr_algebraic_segment_traits_2 geometry traits class. Essentially, this traits class handles all algebraic curves. However, defining the input curves you are interested in may not be intuitive. Secondly, while Arr_algebraic_segment_traits_2 was designed and implemented to achieve maximum efficiency, a traits class that is dedicated to handle bounded degree algebraic curves like those you are interested in could be more efficient. You are welcome to implement such a traits class on your own. In addition to the online help, you will find our book, entitled CGAL Arrangements and Their Applications, a good source of information. If you are considering purchasing a commercial license, directly consulting GeometryFactory can be useful.

BW, if, for example, you are willing to approximate circles with cubic Bézier curves, you can use the Arr_Bezier_curve_traits_2 geometry traits, but again, this may be not intuitive or even desired.

Best,

Efi

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On Thu, Oct 8, 2015 at 3:25 PM, Ronald Paloschi <> wrote:

Hi,

In our company, we are experiencing around with CGAL, it is such an amazing library!

I need some advice that I think you fellows can give me.

First, context: We have a legacy CAD system with an in-house geometric library. We would like to start experiencing with cgal to replace this library.

Our model has 3 main types of geometries (Line segments, Arcs and Bezier curves).

It was really easy to move around and start using things.

Now I have a new challenge: Intersections. The Arrangements package seems the way to go, I'm still studying it.

My question: How can I setup an Arrangement that is able to manage those 3 types together (if possible)?

Thanks in advance!