CGAL users discussion list

["Yin Xuetao" <>]

Dear Developers of CGAL:

 

The following code was from the Is_Collapsable() in Edge_collapse_impl.h of Edge_collapse package, it is used to determine whether an edge is collapsable or not. However, i am a little confused because i thought this piece of code basically mark every border edge as unremovable as far as i am concerned.

Thanks!

 

//////////////////////////////////////////////////////////

if ( rR )
  {
    if ( aProfile.is_v0_v1_a_border() )
    {
      if ( Is_open_triangle(aProfile.v0_v1()) )
      {
        rR = false ;
        CGAL_ECMS_TRACE(3,"  p-q belongs to an open triangle. NON-COLLAPSABLE edge." ) ;
      }
    }
    else if ( aProfile.is_v1_v0_a_border() )
    {
      if ( Is_open_triangle(aProfile.v1_v0()) )
      {
        rR = false ;
        CGAL_ECMS_TRACE(3,"  p-q belongs to an open triangle. NON-COLLAPSABLE edge." ) ;
      }
    }

 

//////////////////////////////////////////////////

On Jan 4, 2008 1:51 AM, Yin Xuetao <> wrote:

Hi, All,
I have been using Edge Collapse recently, however, it seems that it does not touch boundary edges at all.
Anybody has any idea about this issue? Thanks!

Happy New Year!
--
Xuetao Yin
(Shu-e-tao)

-- 
Xuetao Yin
(Shu-e-tao)