How to display in real time the curve linked to moving geometrical objects like shown in this video (0:45) ?
http://link.brightcove.com/services/player/bcpid1198972958001?bckey=AQ~~,AAABDi-Jgtk~,SFQb4J3Cm1hDhskzjdtQ1Hy-2bmFZ__3&bctid=2480062134001
Edited: 15 Sept 2013, 2:31 p.m.