title: when I use CGAL LSCM，there are some overlaps
body: <p><a href="https://i.stack.imgur.com/4cueR.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>when I use CGAL LSCM，I find there are some overlaps.
  there are some descriptions in CGAL doc.
  But I still want to use CGAL LSCM  to achieve Mesh Parameterization，so what can I do to solve the problem.</p>
  <p><a href="https://i.stack.imgur.com/a92DM.png" rel="nofollow noreferrer">enter image description here</a></p>