CGAL users discussion list

[Pierre Alliez <>]

hi Ashwin,

the API is not yet complete mostly for lack of time - but as this is an 
open source project you can contribute at any time by submitting the 
missing functions together with their unitary tests.

we are working on completing these functions in CGAL but this will not 
be for the next release.
in the meantimg I can send  you the current missing functions that we 
have for triangles.

best,


Pierre Alliez
INRIA Sophia Antipolis - Mediterranee 
Project-team GEOMETRICA 
http://www-sop.inria.fr/members/Pierre.Alliez/
Tel: +33 4 92 38 76 77
Fax: +33 4 97 15 53 95



Ashwin Nanjappa a écrit :
> Hi,
>
> Recently I had to write some code to find the intersection of a
> Triangle_3 and Segment_3. I noticed that I could do a
> CGAL::do_intersect() [1] of these to find *if* there is any
> intersection. But, I *cannot* do a CGAL::intersection() [2] of these
> objects to obtain the intersection object. What is the reason for this
> API design?
>
> Currently, I get around this by:
> (1) Getting the Plane_3 of the triangle using Triangle_3::supporting_plane()
> (2) CGAL::intersection of the Plane_3 and the Segment_3 to get the
> intersection object.
> (3) Checking if the intersection CGALObject thus obtained lies on the
> Triangle_3.
>
> Is there a better way to do this?
>
> [1] 
> <http://www.cgal.org/Manual/3.4/doc_html/cgal_manual/Kernel_23_ref/Function_do_intersect.html>
> [2] 
> <http://www.cgal.org/Manual/3.4/doc_html/cgal_manual/Kernel_23_ref/Function_intersection.html>
>
> Regards,
> ~ash
>