Hi,
I'm struggling to find any information regarding how an FMC/FMS/FMGC (I think that is most types covered

) handles continuous climbs/descents.
The only time I've seen this is on RNAV departures/arrivals, and I wondered whether this particular way of flying was specific to RNAV procedures, and whether the flight management system can be persuaded to fly this way with pilot-entered waypoints (for example)?
e.g. suppose the aircraft is approaching a waypoint with the constraint CROSSING AT 8000 ft, yet the aircraft has the performance to be at 8000 ft 5 nm before the waypoint. On an RNAV departure I have seen the aircraft fly a path that will ensure it passes the waypoint at 8000 ft, but at a shallower climb angle than it is otherwise capable of. Is this standard for any type of waypoint, or only RNAV procedures?
ECAM Actions.