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Factor out common ship gun fire code into shp_fire()

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This takes care of a number of bugs / inconsistencies:

* Ships with zero firing range could return fire and fire support, but
  not fire actively or interdict.  Fix by testing for gun limit
  instead in multifire() and mission().  No ships in the stock game
  are affected.

* Required gun crew was inconsistent: multifire() let N military fire
  max(1,floor(N/2)) guns for active fire.  Ditto perform_mission() for
  interdiction.  quiet_bigdef() let them fire N guns for returning gun
  fire.  Ditto sd() for firing support and firing at boarding parties.
  fire_dchrg() let them fire floor(N/2) for returning fire to
  torpedoes.  Unify to let N military fire floor((N+1)/2) guns.

* Shell use was inconsistent: sd() and perform_mission() used one
  shell per gun, everything else one per two guns.  Unify to one shell
  per two guns.

* Shell resupply bugs: multifire() got two shells regardless of actual
  ammo use.  quiet_bigdef() got one shell (but use_ammo() uses only
  one, which is a bug).  sd() and perform_mission() resupplied before
  checking all other requirements and could thus get more shells than
  actually needed.
This commit is contained in:
Markus Armbruster 2008-03-02 11:59:56 +01:00
parent a3ad623b2a
commit 22c6fd8bf6
7 changed files with 65 additions and 109 deletions
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24
src/lib/commands/torp.c
View file

@ -319,30 +319,12 @@ static void
fire_dchrg(struct shpstr *sp, struct shpstr *targ, int ntargets)
{
int dam;
int shells;
int gun;
double guneff;
if ((mchr[(int)targ->shp_type].m_flags & M_SUB) == 0) {
shells = sp->shp_item[I_SHELL];
gun = sp->shp_item[I_GUN];
gun = MIN(gun, sp->shp_glim);
gun = MIN(gun, sp->shp_item[I_MILIT] / 2);
shells += supply_commod(sp->shp_own, sp->shp_x, sp->shp_y,
I_SHELL, (gun + 1) / 2 - shells);
gun = MIN(gun, shells * 2);
if (gun == 0)
return;
/* ok, all set.. now, we shoot */
shells -= ldround(gun / 2.0, 1);
sp->shp_item[I_SHELL] = shells;
dam = shp_fire(sp);
putship(sp->shp_uid, sp);
guneff = seagun(sp->shp_effic, gun);
dam = (int)guneff;
if (dam < 0)
return;
if (ntargets > 2)
dam /= ntargets / 2;