CGAL users discussion list

["Brown, James 2" <>]

Thanks, C3T3_helpers.h gives some insight.

> Moving a vertex implies :
> - removing the old vertex : the new cells are the ones that triangulate the 
> cavity formed by removing it
> - inserting the position to a new vertex : the new cells are the cells 
> incident to the new vertex
>
> These groups of cells are not the same, and a union of them has to be done.
> C3T3_helpers.h contains everything you need.

Removal makes sense to me; removed cells are the union of the incident cells 
of the old vertex along with the conflict cells of the new vertex in the old 
triangulation.
New cells are not so clear to me, how do I get the cells of the filled 
cavity? The helpers have outdated cells, which are the conflict zone of the 
old point in the new triangulation, is this the cavity triangulation? If this 
is the case then would the new cells just be the union of the outdated cells 
and the incident cells of the new vertex?

Thanks,
James