+** \brief Waypoint is used to handle variations along the time of the ValueNodes
+*
+* The Waypoint is a child of a ValueNode (or any of inherited) and it describes the
+* Interpolation type (before and after), the ValueNode (usually waypoints are constant
+* but in fact they can be animated) and the time where the waypoint is.
+* \see Waypoint::get_value(), Waypoint::get_value(const Time &t)