CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

On 05/17/2013 09:58 AM, ChaoM wrote:
> Hi Sebastien:
>       I meet a newly problem. I use Delaunay Triangulation ,so I get the
> Delaunay "dt", and push "dt" to ".off" format files. Then I use your given
> code !

The problem comes probably from how you created the off file.

You should generate a polyhedron from the convex hull of your points.
See the examples of this chapter:
www.cgal.org/Manual/latest/doc_html/cgal_manual/Convex_hull_3/Chapter_main.html

Then construct nef from the polyhedron and it should be working.

Sebastien.

> But there exits an error about "CGAL::OFF_to_nef"  I think the problem is
> mainly caused by these reasons:
>
> 1, In the manual ,the convertion is between polyhedron and Nef_polyhedron,
> so My code firstly use Delaunay to triangulate some points, and store " dt "
> into the .off format ,not the polyhedron.
>
> 2, I saw the .off webpage and the "OFF_to_nef.h" , the error is about
> searching the index,for my code store the "dt",so the index of dt  is not
> meet the "OFF_to_nef.h" request!
>
> I try to take all the left ,right and intersected points together! And use
> Delaunay to triangulate them, but as you see in the picture ,the result
> doesn't meet my goal!  There exits other lines between two half spheres.  So
> I choose to use the Boolean Operation ,and use the structure of Nef
> polyhedron!
> Would you help me to solve the problem? Or should I show more detail codes?
>
>
> Thank you !
>
>
>
>
>
> --
> View this message in context: 
> http://cgal-discuss.949826.n4.nabble.com/Nef-polygon-tp4657453p4657480.html
> Sent from the cgal-discuss mailing list archive at Nabble.com.