Adds a `DEATH_ROLL` status to specifically cover the state after ships have been destroyed but before they exit. I've also audited all code that interacts with the ship registry to use the correct state with this new state taken into consideration.
This fixes access to exploding ships that was broken when the ship registry framework was introduced. In particular, the `when destroyed X beam-lock-all X` QoL feature now works again.
When only one AI class performs autoscaling, the math formulas which use autoscaling will become meaningless (e.g. in `ai_maybe_launch_cmeasure()`) or will cause divide-by-zero errors (e.g. in `ai_manage_shield()`). And autoscaling is not very useful outside of the specific ways that Volition used it. So this adds some warnings and disables single-occurrence autoscaling.
Fixes#5474.
Many values in `ai.tbl` can be inserted as overrides for their equivalent `Ai_profiles.tbl` values. (They are all optional and if not set for an AI class, the values in AI Profiles will be used.)
This is particularly useful for making very specific AI classes that still follow the main AI profiles table with easy to change values.
This PR adds `$firing requires exact los:` as an optional override to set in `ai.tbl`. This particular override is very useful, since it can be set to off by default in the `ai_profiles.tbl` for performance, but then set to on for some select AI classes within `ai.tbl`, and those AI classes can be easily changed on the fly in a mission.
This initializes `mc_info` to the correct values when it is constructed, removing the need for `mc_info_init`.
This PR also fixes a group of incorrectly inverted assignments in beam.cpp.
Follow-up to #5040. This extends the checks to most iterations over `obj_used_list` in FSO. There are a few exceptions such as `waypoint_add` and `waypoint_remove`, plus a few others. And none of the object iterations in FRED have the guard because FRED does not use the same object life cycle as FSO.
When iterating through `Ship_obj_list`, check the `Should_be_dead` flag before using the object. This fixes#4990 and adds defense-in-depth checks to guard against similar errors elsewhere.
I considered moving the `Ship_obj_list` removal from `obj_delete` to `ship_cleanup`, but decided it would be prudent to avoid fundamental changes to lifecycle management.
Whether a ship is a support ship or its target, and whether it is destroyed or vanished, its repair/rearm mode should be cleaned up in a consistent way. This fixes a bug in Series Resurrecta where calling `ship-vanish` on a support ship put things into a broken state.
In the submodel reorganization in commit 575c050da4, subobject movement was moved out of the AI pipeline, which inadvertently removed the play-dead check that prevents subsystem movement. This broke a few missions such as Scroll's 'Thor's Hammer'. This PR restores the check.
Fixes#4933.
PR #4516 did not cover all of the autoscaled AI class attributes, since a few of them were labeled differently. This adds checks to grab the correct autoscale index for the remaining cases:
```
$Afterburner Use Factor:
$Shockwave Evade Chances Per Second:
$Get Away Chance:
$Secondary Range Multiplier:
```
Fortunately, Sushi's investigation was pretty thorough. Between these remaining cases and @EatThePath's autoscaling review, this PR should cover the complete set of autoscaling situations.
Fixes#4922.
Adds gravity! Applies on a per-mission basis, and weapons, ships, debris, and asteroids now have a configurable "gravity const" which multiplies the effect of gravity on them, by default everything except debris is 0 (meaning no effect even when the mission has gravity). AI and the lead indicator will also lead for ballistic trajectories as well, given a gravity-affected weapon. No FRED support or gravity direction control yet, to come in later PRs.
* Enable clients to move turrets
This allows clients to user server data to move turrets according to the timing and target data on the server. Uses a small packet to do so.
This adds an AI profiles flag that filters autoscaling so that only the index and number of autoscaled classes are considered, not the index and number of all AI classes.
Fixes#4516.
Tyler Blount