CGAL users discussion list

[Ashwin Nanjappa <>]

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