We have debug commands for sexps, so here are a few for scripts. These will be very useful for script developers to perform diagnostics and troubleshooting.
Two updates to the energy transfer system.
1. Previously, for fighters missing a system (e.g. shields), the energy would be treated as if all energy from that system was routed to the other systems. So, for example, a fighter's typical speed would be faster without shields than with shields. A new AI profile flag now treats the other systems as if the energy had not been transferred.
2. At some point in development, Volition intended the `$Power Output` ships.tbl field to affect ETS. A new AI profile flag now treats the power output as a factor of energy applied to energy systems.
Return the current supernova stage. This sexp, in conjunction with mission cutscene editor, makes it possible to reproduce the FreeSpace 2 end-of-campaign cutscene behavior purely in FRED. The resulting cutscene section looks like this:
```
$Campaign End Cutscene: endpart1.mve
+formula: ( true )
$Campaign End Cutscene: endprt2a.mve
+formula: ( < ( get-supernova-stage ) 3 )
$Campaign End Cutscene: endprt2b.mve
+formula: ( >= ( get-supernova-stage ) 3 )
```
Also add a new status subcategory and fix newline behavior when saving the cutscene section.
Fixes#6657.
* base working version
* localization and minor tweaks
* add retail UI controls
* Add way to hide gauges from Config view
* convert hud config from index matching to id matching
* clang
Copy existing code from change-ship-alt-name into new sexp
change-ship-display-name and likewise from OP_SHIP_CHANGE_ALT_NAME to
new OP_SHIP_CHANGE_DISPLAY_NAME. Create new blank function
"sexp_ship_change_alt_name_or_callsign" and a function for multi too.
Remove the `n_quadrants` field because it is entirely redundant to the size of `shield_quadrant`. Also, be more rigorous about the difference between `shield_get_quad(i)` (which can fluctuate) and `shield_quadrant[i]` (which gives the exact quadrant strength). Finally add some C++ casts and move some checks to better places.
Allow `stringcost()` to use a specified function to check equality, and provide both case-sensitive and case-insensitive sample functions. Use case-insensitive checks for sexp operator lookup.
Make `SCP_vector`, `SCP_list`, `SCP_set`, and `SCP_multiset` subclasses of their STL counterparts. This allows helper functions to be added to each, including the `contains()` function which is not available until C++20. (This has minor effects on other parts of the codebase that treated `SCP_` and `std::` as synonyms.) Since there is now a nontrivial amount of code that needs to be in a .cpp file, create vmallocator.cpp.
Note that `SCP_string` truncation has been refactored to use length rather than C-string size to be consistent with other `std::basic_string` functions.
Also, remove some enum class hashing code which is no longer necessary now that the codebase is at C++17.
Any NaN encountered in the evaluation of functional-if-then-else should be isolated to the branch on which it occurs. Fixes#6536.
Also improve some help text for clarity.
There is a rather large design flaw in FreeSpace debriefings... debriefing SEXPs can refer to in-mission ship data, while all ships (and all objects) are deleted as soon as the mission completes. Specifically, `obj_delete()` is called which sets all objects to `OBJ_NONE` and marks them as freed, although the data still exists in the various arrays. This is the use-after-free problem, but applied to the in-game object system, rather than memory accessed by pointers.
It's probably best to defer fixes to an as-needed basis. As for hitpoint SEXPs, this change updates them to use the object and ship references from the ship registry, since the ship registry is not cleared by the time the debriefing is loaded. (Using `objp->instance` and `shipp->objnum` at this point would be problematic.) Since subsystems are also cleared at this point, this also updates the warning messages in those functions.
Fixes an Assert seen in debug mode in Inferno.
When a mission is loaded in FRED the "immobile" flag is migrated to "don't-change-position" and "don't-change-orientation". So, notify the FREDder that this is happening, and add checks to the "potential issues" checker to guard against mixing the old and new flags.
Follow-up to #6304. Resolves#6489.
Due to broken node iteration, the `sexp_ship_deal_with_subsystem_flag()` function incorrectly treated the first sexp node as a subsystem, but previous versions of the function would fail silently and ignore it, and subsequent nodes would work as expected. With the new `process_ship_subsystems()` function, this error is properly flagged (and the incorrect node is again bypassed). So, fix the error by fixing the node iteration.
Follow-up to #6221.
1. Allow the goal priority to be an evaluated number, not just a literal number. This allows the goal priority to be obtained from operators or calculations.
2. Since the priority can now be evaluated, it can be NaN. In that case, default to the max priority.
3. Consolidate `CDR(CDR(...))` to `CDDR()` in the aigoal implementation
4. Clarify that `remove-goal` removes the first goal of a given type and priority, not necessarily the first fully matching goal.
5. Enhance `remove-goal` to remove all goals matching the constraints, not just the first goal.
6. Allow `remove-goal` to disregard priority when checking for matching goals.
Many SEXP operators that work on subsystems use very similar code. This new function allows the operator implementations to be streamlined and makes future modifications easier. For example, the `change-ai-class` operator now works with names such as `<all turrets>` as well as specific subsystems.
1. Don't set the `can_use_for_bank` flag to FALSE if the bank is primary but the weapon is secondary, or vice versa
2. Make sure to only restrict the weapons by bank if the ship has per-bank restrictions
In support of this, add `is_primary()` and `is_secondary()` helper functions to `weapon_info` and use them in logical places.
Follow-up to #6434. Fixes a few subtle bugs from that PR.
This adds a sexp to allow any boolean condition, or series of conditions, to be evaluated not only instantaneously, but also for a period of time. For example, this can be used with `is-facing` to check if a ship has been facing another ship for a specified duration. Previously this had to be done through scripting or through a group of sexps.
Implements #5754.
When a player tries to skip a mission during a campaign, all goals and events are marked true. Thus it's possible for the campaign condition to unexpectedly *not* evaluate to the next mission (e.g. `if is-previous-goal-false` or `is-previous-event-false` is used without the optional argument). So add a failsafe check, with a warning, to handle this case. Also update the documentation to clarify that the optional argument is checked for the mission-skipped case.
Fixes an endless skip-to-the-same-mission loop discovered by ShivanSlayer in Shrouding the Light.
Goober5000