/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2008, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Copyright (C) 1986-2009, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure
*
* This program is free software; you can redistribute it and/or modify
* landgun.c: Fire weapons
*
* Known contributors to this file:
- * Markus Armbruster, 2006-2008
+ * Markus Armbruster, 2006-2009
*/
#include <config.h>
#include "sect.h"
#include "ship.h"
-double
+static double
fortgun(int effic, int guns)
{
double d;
return d;
}
-double
+static double
seagun(int effic, int guns)
{
double d;
return d;
}
-double
+static double
landunitgun(int effic, int guns)
{
double d;
fort_fire(struct sctstr *sp)
{
int guns = sp->sct_item[I_GUN];
- int shells;
if (sp->sct_type != SCT_FORTR || sp->sct_effic < FORTEFF)
return -1;
if (sp->sct_item[I_MILIT] < 5 || guns == 0)
return -1;
- shells = sp->sct_item[I_SHELL];
- shells += supply_commod(sp->sct_own, sp->sct_x, sp->sct_y,
- I_SHELL, 1 - shells);
- if (shells == 0)
+ if (!sct_supply(sp, I_SHELL, 1))
return -1;
- sp->sct_item[I_SHELL] = shells - 1;
+ sp->sct_item[I_SHELL]--;
return (int)fortgun(sp->sct_effic, guns);
}
int
shp_fire(struct shpstr *sp)
{
- int guns, shells;
+ int guns;
if (sp->shp_effic < 60)
return -1;
guns = MIN(guns, (sp->shp_item[I_MILIT] + 1) / 2);
if (guns == 0)
return -1;
- shells = sp->shp_item[I_SHELL];
- shells += supply_commod(sp->shp_own, sp->shp_x, sp->shp_y,
- I_SHELL, (guns + 1) / 2 - shells);
- guns = MIN(guns, shells * 2);
+ shp_supply(sp, I_SHELL, (guns + 1) / 2);
+ guns = MIN(guns, sp->shp_item[I_SHELL] * 2);
if (guns == 0)
return -1;
- sp->shp_item[I_SHELL] = shells - (guns + 1) / 2;
+ sp->shp_item[I_SHELL] -= (guns + 1) / 2;
return (int)seagun(sp->shp_effic, guns);
}
int
shp_dchrg(struct shpstr *sp)
{
- int shells, dchrgs;
+ int dchrgs;
if (sp->shp_effic < 60 || (mchr[sp->shp_type].m_flags & M_DCH) == 0)
return -1;
if (sp->shp_item[I_MILIT] == 0)
return -1;
- shells = sp->shp_item[I_SHELL];
- shells += supply_commod(sp->shp_own, sp->shp_x, sp->shp_y,
- I_SHELL, 2 - shells);
- if (shells == 0)
- return -1;
- dchrgs = MIN(2, shells);
- sp->shp_item[I_SHELL] = shells - dchrgs;
+ shp_supply(sp, I_SHELL, 2);
+ dchrgs = MIN(2, sp->shp_item[I_SHELL]);
+ if (dchrgs == 0)
+ return -1;
+ sp->shp_item[I_SHELL] -= dchrgs;
return (int)seagun(sp->shp_effic, 2 * dchrgs - 1);
}
int
shp_torp(struct shpstr *sp, int usemob)
{
- int shells;
-
if (sp->shp_effic < 60 || (mchr[sp->shp_type].m_flags & M_TORP) == 0)
return -1;
if (sp->shp_item[I_MILIT] == 0 || sp->shp_item[I_GUN] == 0)
return -1;
if (usemob && sp->shp_mobil <= 0)
return -1;
- shells = sp->shp_item[I_SHELL];
- shells += supply_commod(sp->shp_own, sp->shp_x, sp->shp_y,
- I_SHELL, SHP_TORP_SHELLS - shells);
- if (shells < SHP_TORP_SHELLS)
- return -1;
- sp->shp_item[I_SHELL] = shells - SHP_TORP_SHELLS;
+ if (!shp_supply(sp, I_SHELL, SHP_TORP_SHELLS))
+ return -1;
+ sp->shp_item[I_SHELL] -= SHP_TORP_SHELLS;
if (usemob)
sp->shp_mobil -= (int)shp_mobcost(sp) / 2.0;
return TORP_DAMAGE();
ammo = lchr[lp->lnd_type].l_ammo;
if (CANT_HAPPEN(ammo == 0))
ammo = 1;
+ lnd_supply(lp, I_SHELL, ammo);
shells = lp->lnd_item[I_SHELL];
- shells += supply_commod(lp->lnd_own, lp->lnd_x, lp->lnd_y,
- I_SHELL, ammo - shells);
if (shells == 0)
return -1;
d = landunitgun(lp->lnd_effic, guns);
d *= (double)shells / (double)ammo;
ammo = shells;
}
- lp->lnd_item[I_SHELL] = shells - ammo;
+ lp->lnd_item[I_SHELL] -= ammo;
return d;
}
+/*
+ * Sabotage with land unit LP.
+ * Use ammo.
+ * Return damage if the land unit sabotages, else -1.
+ */
+int
+lnd_sabo(struct lndstr *lp, short item[])
+{
+ int dam;
+
+ if (lp->lnd_ship >= 0 || lp->lnd_land >= 0)
+ return -1;
+ if (!(lchr[lp->lnd_type].l_flags & L_SPY))
+ return -1;
+ if (!lp->lnd_item[I_SHELL])
+ return -1;
+ lp->lnd_item[I_SHELL]--;
+ dam = fortgun(3 * lp->lnd_effic, 7);
+ if (item[I_SHELL] > 20)
+ dam += seagun(lp->lnd_effic, random() % (item[I_SHELL] / 10));
+ if (item[I_PETROL] > 100)
+ dam += seagun(lp->lnd_effic, random() % (item[I_PETROL] / 50));
+ return dam;
+}
+
/*
* Return number of guns ship SP can fire.
*/
return -1.0;
rng = effrange(14.0 * fire_range_factor, np->nat_level[NAT_TLEV]);
- if (sp->sct_effic > 59)
+ if (sp->sct_effic >= 60)
rng++;
return rng;
}