- UM_FULL, /**< [TODO] */
- UM_LAZY, /**< [TODO] */
+ UM_FULL, /**< Full update mechanism: the remaining time of every action is recomputed at each step */
+ UM_LAZY, /**< Lazy update mechanism: only the modified actions get recomputed.
+ It may be slower than full if your system is tightly coupled to the point where every action
+ gets recomputed anyway. In that case, you'd better not try to be cleaver with lazy and go for
+ a simple full update. */