title: Graphical link moving algorithm
body: <p>In order to develop a SVG drawing software, I would like to know if there is some algorithms to perform a moving of angular link between two rectangle. Angular link means a not linear link between two graphical objects, with a 90° angle.</p>
  
  <p>Visual paradigm and others modelisation software perform nice moving of this type of link but I don't know how.</p>
  
  <p>Thanks for your help</p>