The old code didn't honor command abortion at the following prompts:
* arm third argument
* deliver fourth argument (also simplify)
* fire third argument
* fly and recon prompt for carrier to land on: pln_onewaymission()
treated abort like empty input, which made planes attempt landing in
the sector.
* lmine second argument
* order d fourth argument
* power c nat(s) argument
* range second argument
* sail second argument
* shutdown both arguments (first one was broken in commit 84cfd670,
v4.3.10, second one never worked).
* tend third argument
Commit 7ca4f412 (v4.3.12) marked planes flying a sortie with
PLN_LAUNCHED, and made pln_arm() reject planes with that flag set.
This was designed to reject escorts that were already flying as
bombers. It didn't work, because the test for PLN_LAUNCHED used a
stale copy of the plane created by pln_sel(). Fix by getting a fresh
copy.
The bug always existed, but the botched fix in commit 7ca4f412 made it
worse. Before, ac_encounter() dropped escorts that were also bombers,
so the bug merely wasted plane fuel. After, such planes were
effectively duplicated, and damage to one of them, usually the bomber,
was wiped out. Abusable.
The values in these columns were computed by count_sect_units() and
count_sect_planes(), which included land units and planes in the count
that aren't shown by prunits() and prplanes(), namely own and embarked
units. Confusing. Moreover, count_sect_planes() and prunits() rolled
dice separately for spy units. This could leak the presence of spies
even when prunits() didn't show them.
All fixable, but not worth the trouble; just remove the counts.
Commit 7ca4f412 fixed tracking of planes flying a sortie by marking
them with flag PLN_LAUNCHED. It failed to write SAMs and planes
flying missions back to the plane file, in sam_intercept() and
mission_pln_arm(). The only known problem with that is fairly
harmless: when the mission damages planes on the ground, the planes
flying it get damaged as if they were still sitting in their bases,
but the damage gets wiped out when they land.
The same issue applies to missiles. So they need to be tracked as
well. Do that in msl_hit().
While there, remove a few redundant PLN_LAUNCHED sanity checks.
Planes normally sit in their base (sector or carrier), where they can
be spied, damaged, captured, loaded, unloaded, upgraded and so forth.
All this must not be possible while they fly. There are two kinds of
flying planes: satellites in orbit, and planes flying a sortie.
Satellites in orbit have always been marked with flag PLN_LAUNCHED.
Works. What didn't work was tracking planes flying a sortie.
If you look at one sortie in isolation, up to three groups of planes
can be flying at any point of time: the primary group, which carries
out the sortie's mission (bomb, transport, ...), their escorts, and a
group of hostile planes flying interception or air defense.
The old code attempted to track these planes by passing those groups
to the places that need to know whether a plane is flying. This was
complex and incomplete, and broke down completely for the pin-bombing
command.
It was complex, because the plane code needs to keep track of all the
call chains that can lead to a place that needs to know whether a
plane flies, and pass the groups down the call chains. This leads to
a rather ugly passing of plane groups all over the place.
It was incomplete, because it generally failed to pass the escorts.
And the whole scheme broke down for the pin-bombing command. That's
because pin-bombing asks the player for targets while his planes are
loitering above the target sector. This yields the processor and lets
other code run. Which does not get the flying planes passed.
The new code marks planes and SAMs (but not other missiles) flying a
sortie with flag PLN_LAUNCHED (the previous commit laid the groundwork
for that), and does away with passing around groups of flying planes.
This fixes the following bugs:
* Many commands could interact with foreign planes flying for a
pin-bombing command as if they were sitting in their base. This
includes spying, damaging, capturing, loading, or upgrading them,
and even getting intercepted by them. Any changes to those planes
were wiped out when they landed. Abusable.
* The bomb command could bomb its own escorts, directly (pin-bomb
planes) or through collateral damage, strategic sector damage,
collapsing bridges or nuke damage. The damage to the escorts was
wiped out when they landed.
* If you asked for a plane to fly both in the primary group and the
escort group, you got charged fuel for two sorties instead of one.
* pln_put1() and pln_put() now recognize planes that didn't take off,
and refrain from making them land. Intercept (since commit
c64e2149) and air defense can do that. Making them land had no
ill-effects, but it was still wrong.
There's one new problem: if PLN_LAUNCHED doesn't get reset properly,
due to game crash during flight or some other bug, the plane gets
stuck in the air. Catch and fix that on game start in ef_verify().
Use new pln_is_in_orbit() when we want to test for orbit specifically,
and test PLN_LAUNCHED when we want to test whether the plane not
sitting in the sector (because it is flying). This distinction is
pointless at this time, because the only way PLN_LAUNCHED gets set is
when a satellite goes into orbit. It will become useful in a later
commit, which will use PLN_LAUNCHED to mark flying planes.
Use it in pln_put() and ac_planedamage().
This changes ac_planedamage() to deal with a destroyed airbase.
Before, aborted planes happily landed there. This bug could not
actually bite, because the code neither yields nor does damage to
potential airbases between checking the landing airbase before takeoff
and aborting planes in ac_planedamage().
It changes pln_put() to cope with dead planes. Before, it made them
land as if they lived, fortunately without ill effects (complaints
about not being able to land were suppressed for dead planes).
ac_planedamage() removes dead planes, but pinflak_planedamage()
doesn't, and these end up in pln_put(). pinflak_planedamage() no
longer has to take shot down planes off their carriers, because
pln_put() now takes care of that.
New pln_att(), pln_def(), pln_acc(), pln_range_max(), pln_load()
replace the struct plnstr members with the same names.
Make plane selectors att and def virtual.
The macros defining unit stat development in tech are somewhat
inconvenient to use. Define more convenient functions, and hide away
the macros near the function definitions.
(carriersatxy, pln_onewaymission): Pass zero. No functional change.
(pln_airbase_ok): Pass whether the plane is a missile. This fixes
non-x-light missiles on ships without capability M_FLY. Broken in
rev. 1.76. Launch and interdict weren't affected. Air defense was,
but the stock game has only x-light SAMs.
(pln_onewaymission): Use it. No functional change.
(pln_airbase_ok): Use it to enforce capabilities. Before, a plane
could fly once it got on the ship. Because ships can load only planes
that can fly from them, this has no effect other than make that sanity
check redundant; remove it.
(pln_airbase_ok): Update land unit case to keep it similar to the ship
case.
Check player->cnum only when noisy. Update existing caller to pass 1.
No functional change.
(mission_pln_airbase_ok): Remove, use pln_airbase_ok() instead. No
functional change.
last, so when it was (no longer) allied, attempting to fly off it let
you test the conditions checked before that. Check owner first.
(mission_pln_airbase_ok): Matching change, to avoid diverging from
pln_airbase_ok().
bad. Before, the plane was destroyed, and the player got a message.
(pln_airbase_ok, mission_pln_airbase_ok): Oops when plane's base
sector is bad.
(pln_airbase_ok): Oops when the player doesn't own the plane. Before,
this was checked only for planes on carriers, and the plane was
destroyed, and the player got a misleading message.
more so: additionally, any of P_E, P_K, P_L satisfied any subset of
P_E, P_K, P_L. Chainsaw fixed this one in plnsub.c, but not here.
Remove, use the fixed pln_wanted() instead.
(pln_wanted): External linkage.
buggy: any P_E, P_L, P_K in wantflags were ignored when the plane
lacked P_ESC. The bug bit only when non-escort interceptors escorted
a one-way mission to a carrier. pln_oneway_to_carrier_ok() then could
not fit the plane on the carrier, and the command failed complaining
about lack of room on the carrier. Broken since Chainsaw added
escorts, abusable before 4.2.17 catched it. Also change behavior when
only one of P_F and P_ESC is in wantflags: new version requires that
flag, while old version treats it as if both flags were in wantflags:
a plane having either is okay. Current code never passes such
wantflags.
ships, so that order of loading no longer matters: choppers can use
chopper or plane slots, x-lights can use x-light or plane slots, light
planes can use plane slots. However, plane slots require M_FLY or
M_MSL to hold missiles or x-lights, and M_FLY to hold anything else.
Choppers and x-lights can now use plane slots even when not light.
X-light choppers, which don't exist in the stock game, can no longer
use x-light slots.
(fit_plane_on_ship, fit_plane_on_land): New.
(pln_oneway_to_carrier_ok, put_plane_on_ship, count_planes)
(put_plane_on_land, count_land_planes): Use them. No functional
change.
(fit_plane_off_ship, fit_plane_off_land): New.
(take_plane_off_ship, take_plane_off_land): Use them. This oopses
when the carriers plane counter underflows.
(take_plane_off_ship): Document that carrier's plane counters may be
screwed up.
(take_plane_off_ship, take_plane_off_land): Oops when the plane isn't
on the carrier.
(take_plane_off_ship, take_plane_off_land): Don't fail when the plane
to be taken off can't go on this type of carrier, just take it off.
No error condition left, so return void. Callers couldn't do anything
useful with the status anyway, and most didn't bother. Change those
that did.
other. Ensure headers in include/ can be included in any order
(except for econfig-spec.h, which is special). New header types.h to
help avoid inclusion cycles. Sort include directives. Remove some
superflous includes.
(pln_mobcost): Don't round cost computation intermediate values.
(pln_mobcost): Don't limit cost to current mobility + 32. No
airworthy plane can possibly use more than 55 mobility in one sortie,
and mobility going that much negative is fine.
airburst. Leave taking nuke off the plane to caller. Use coord for
coordinate parameters.
(pln_damage): Take nuke off the plane.
(detonate): Destroy the nuke. This is required since arming doesn't
remove nukes from the nuke file anymore (arm.c rev. 1.15).
