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Rear-fire + look views (task #68): the pod's rear arsenal reconstructed

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The user's tip ("some mechs actually do fire backward") checks out end to
end.  Binary ground truth [T1]:
- weapon+0x334 (attr 0x1B "RearFiring"): the ctor tests the MOUNT SEGMENT's
  page name for the marker 'b' (@0x511aa2, part_013.c:6913-6930) -- the back
  gun ports sitelbgunport/siterbgunport.  The old reading ("EXT in the
  weapon model name") was a double misread (wrong string, wrong name).
- mech+0x410 (attr id 50 "RearFiring"; the old `stateFlags` label): the ctor
  ORs every weapon's flag (part_012.c:10220) -- "carries a rear arsenal".
- The mapper's five-state LOOK machine (part_013.c:396-459): on a state
  change it re-aims the eyepoint (mech+0x360 = EyepointRotation -- consumed
  by DPLEyeRenderable, already live in the port) and re-arms each weapon's
  viewFireEnable(+0x3E0): FORWARD view = the non-rear weapons, LOOK-BACK
  (yaw pi + lookBackAngle pitch) = the REAR-mounted ones, side/down = none.
  +0x3E0 is the same flag the emitter's Loaded->Firing gate reads (the old
  `useConfiguredPip` label) -- pips and fire permission both follow the view.

Port: rearFiring derived from the mount segment name (BTWeaponMountIsRear);
mech rearFiring ORed in the roster pass (the old SubProxy::IsDerivedFrom
stub returned 0 -- that loop never ran; now bridged through
BTWeaponIsRearFiring, which also fixes the weaponRoster fill); the look
commit is LIVE (BTCommitLookState: eyepoint EulerAngles from the authored
per-mech look angles -- now real members, were Wword scratch parks -- +
per-weapon view enables); MissileLauncher/ProjectileWeapon FireWeapon gate
on viewFireEnable like the emitter; RearFiring attrs (mech + weapon) bind
real members.  Keyboard: HOLD 'V' = the pod's rear-view button.

Live-verified on the default blackhawk: ERMLaser_2 -> siterbgunport rear=1,
ERMLaser_3 -> sitelbgunport rear=1, PPCs/SRMs/torso mounts forward -- the
blackhawk authors TWO REAR LASERS (owens also has back ports).  [rearfire]
trace under BT_PROJ_LOG.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-16 17:10:40 -05:00
co-authored by Claude Opus 4.8
parent ab6ea83e3b
commit 38febae36b
10 changed files with 195 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files
game/reconstructed/mech.cpp
+18 -11
View File
@@ -731,7 +731,7 @@ const Mech::IndexEntry
ATTRIBUTE_ENTRY(Mech, RadarRange, radarRange), // 0x2f (radar scale)
ATTRIBUTE_ENTRY(Mech, RadarLinearPosition, radarLinearPosition), // 0x30 (Point3D* -> localOrigin)
ATTRIBUTE_ENTRY(Mech, RadarAngularPosition, radarAngularPosition),// 0x31 (Quaternion* -> localOrigin)
ATTRIBUTE_ENTRY(Mech, RearFiring, attrPad), // 0x32
ATTRIBUTE_ENTRY(Mech, RearFiring, rearFiring), // 0x32 (task #68: binary id 50 @0x410)
ATTRIBUTE_ENTRY(Mech, RequestDuckAnimation, attrPad), // 0x33
ATTRIBUTE_ENTRY(Mech, UnstablePercentage, unstablePercentage), // 0x34 (task #66: the instability alarm; binary id 52 @0x3F0)
ATTRIBUTE_ENTRY(Mech, SuperStop, attrPad), // 0x35
@@ -853,7 +853,7 @@ Mech::Mech(
mechNameFilter.Initialize(); // FUN_00435a7c(this+0xdb)
masterAlarm = AlarmIndicator(0x21); // FUN_0041b9ec(this+0xe7,0x21)
stateFlags = 0; // Wword(0xff)
rearFiring = 0; // (task #68) ORed from the weapons below
// (F7 correction) the binary's 0x400 = FLT_MAX init is DistanceToMissile's
// "no missile" far default (attr id 56), NOT a maxSpeed -- the old member
// is retired; distanceToMissile (init below) owns the slot's meaning.
@@ -1329,11 +1329,17 @@ Mech::Mech(
}
for (int id = 2; id < subsystemCount; ++id) // weapon roster (0x511830 = MechWeapon)
{
SubProxy *s = (SubProxy *)subsystemArray[id];
if (s != 0 && s->IsDerivedFrom(0x511830))
// (task #68) REAL derivation test via the mechweap bridge -- the old
// SubProxy::IsDerivedFrom stub returned 0, so this loop never ran
// (empty weaponRoster, no capability OR).
extern int BTWeaponIsRearFiring(Subsystem *sub); // -1 = not a weapon
int rf = BTWeaponIsRearFiring(subsystemArray[id]);
if (rf >= 0)
{
weaponRoster.Add((Subsystem *)s);
stateFlags |= s->capabilityFlags; // |= *(s+0x334) -> Wword(0x104)
weaponRoster.Add(subsystemArray[id]);
// mech.RearFiring |= weapon.rearFiring (binary ctor
// @part_012.c:10220: mech[0x104] |= *(weapon+0x334))
rearFiring |= rf;
}
}
for (int id = 2; id < subsystemCount; ++id) // damageable roster
@@ -1403,11 +1409,12 @@ Mech::Mech(
unstableHighVelocityEffect = model->unstableHighVelocityEffect;
unstableStopedTurnEffect = model->unstableStopedTurnEffect;
// Angle fields converted from degrees to radians.
Wword(0x159) = (int)(model->lookLeftAngle * DegreesToRadians); // +0x50
Wword(0x15a) = (int)(model->lookRightAngle * DegreesToRadians); // +0x54
Wword(0x15b) = (int)(model->lookFrontAngle * DegreesToRadians); // +0x58
Wword(0x15c) = (int)(model->lookBackAngle * DegreesToRadians); // +0x5c
// Angle fields converted from degrees to radians. (task #68: REAL members
// now -- the look-state commit consumes them; were Wword scratch parks.)
lookLeftAngle = model->lookLeftAngle * DegreesToRadians; // +0x50 -> @0x564
lookRightAngle = model->lookRightAngle * DegreesToRadians; // +0x54 -> @0x568
lookFrontAngle = model->lookFrontAngle * DegreesToRadians; // +0x58 -> @0x56C
lookBackAngle = model->lookBackAngle * DegreesToRadians; // +0x5c -> @0x570
// The update-record deadbands (task #3; the struct is now the verified
// 200-byte overlay, so the named fields ARE the raw offsets).
updateTurnAngleDeadband = model->updateTurnDegreeDiffrence * DegreesToRadians; // @0x770