CGAL users discussion list

[Andreas Fabri <>]

On 09/09/2010 03:41, pascal8361 wrote:
> Hello
>
> I did some drawing like in the Delaunay triangulation demo.
>
> painterostream<<  Segment(...);
> than I draw the vertices ....
>
> that is working out quite well ...
>
> know I want to go on and select one of my edges with the mouse cursor, after
> selecting I need the two points incident to the edge ...
>
> that should not be to hard but I don't find a way - thanks for help
>
> best
> Pascal

Hi Pascal,

If you want to do it in the spirit of the current GraphicsView based
demos you should have a look at the file
demo/Triangulation_2/TriangulationCircumcircle.h
and how it is integrated in the demo Delaunay_triangulation_2.cpp

The idea is that the class gets mouse move events, performs a
point location in the triangulation.  Instead of computing the
circumcircle of a face you could check which of the three edges
of the face is closest.

hope this helps,

andreas