CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Hello,

An alternative is to use the Polyhedron itself and the member function 
create_center_vertex as documented here:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Polyhedron_ref/Class_Polyhedron_3.html#Function_Halfedge_handle_create_center_vertex6_Halfedge_handle_h9;

Then to update the new point coordinates use the vertex member function 
Point& point().

ex:

Halfedge_handle h=P.create_center_vertex(what_ever_halfedge);
h->vertex()->point()=Point_3(1,2,3);

S.


Kwangtaek Kim wrote:
> Hello,
>
> I like to add arbitrary points into each triangle and then store vertex 
> normals directly to the points. Could you let me know how to do it in 
> the source code below when I use 
> Enriched_polyhedron_incremental_builder_3<HDS> builder?
>
>  
>
>  
>
>    builder B(hds,true);
>
>   
>
>  Polyhedron::Halfedge_iterator pHalfedge;
>
>     for(pHalfedge = m_pMesh->halfedges_begin();
>
>         pHalfedge != m_pMesh->halfedges_end();
>
>         pHalfedge++)
>
>     {
>
>                 const Point& p1 = pHalfedge->vertex()->point();
>
>                 const Point& p2 = pHalfedge->opposite()->vertex()->point();
>
>                
>
> // division of  each edge
>
>                 Point point1 = 
> Point(0.2f*(p1.x()+p2.x()),0.2f*(p1.y()+p2.y()),0.2f*(p1.z()+p2.z()));
>
>                 B.add_vertex(point1);
>
>                 index++;
>
>                 Point point2 = 
> Point(0.4f*(p1.x()+p2.x()),0.4f*(p1.y()+p2.y()),0.4f*(p1.z()+p2.z()));
>
>                 B.add_vertex(point2);
>
>                 index++;
>
>                
>
> // insert vertex normals to the new points. How?            
>
>                                
>
>     }
>
>  
>
> Thank you.
>
>  
>
> Samuel Kim