/*
* 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
* ---
*
* mission.c: Mission subroutines for planes/ships/units
- *
+ *
* Known contributors to this file:
* Ken Stevens, 1995
* Steve McClure, 1996-2000
+ * Markus Armbruster, 2003-2009
*/
#include <config.h>
static void divide(struct emp_qelem *, struct emp_qelem *, coord, coord);
static int dosupport(struct genlist *, coord, coord, natid, natid);
static int find_airport(struct emp_qelem *, coord, coord);
-static int mission_pln_arm(struct emp_qelem *, coord, coord, int,
- int, struct ichrstr *, int, int);
+static void mission_pln_arm(struct emp_qelem *, coord, coord, int,
+ int, struct ichrstr *, int);
static void mission_pln_sel(struct emp_qelem *, int, int, int);
static int perform_mission(coord, coord, natid, struct emp_qelem *, int,
char *, int);
struct genlist *glp;
struct empobj *gp;
union empobj_storage item;
- int dist;
- int radius;
int relat;
struct sctstr sect;
} else if (relat > HOSTILE)
continue;
- dist = mapdist(x, y, gp->opx, gp->opy);
-
- radius = gp->radius;
- if (mission != MI_RESERVE) /* XXX */
- oprange(gp, &radius);
-
- if (dist > radius)
- continue;
-
- /* Ok, it is within the operations range. */
- /* Now check from where the object actually is */
- dist = mapdist(x, y, gp->x, gp->y);
- radius = 999;
- oprange(gp, &radius);
- if (dist > radius)
+ if (!in_oparea(gp, x, y))
continue;
- /* Ok, the object can get to where the x,y is */
if (opt_SLOW_WAR) {
if (mission != MI_AIR_DEFENSE) {
struct nstr_item ni;
struct plist *plp;
struct plnstr plane;
- int dist;
snxtitem_all(&ni, EF_PLANE);
while (nxtitem(&ni, &plane)) {
if (plane.pln_own != cn)
continue;
-
if (plane.pln_mission != MI_ESCORT)
continue;
-
- dist = mapdist(x, y, plane.pln_x, plane.pln_y);
- if (dist > plane.pln_range / 2)
+ if (!in_oparea((struct empobj *)&plane, x, y))
continue;
-
plp = malloc(sizeof(struct plist));
memset(plp, 0, sizeof(struct plist));
plp->pcp = &plchr[(int)plane.pln_type];
struct sctstr sect;
struct mchrstr *mcp;
struct plchrstr *pcp;
- int dam = 0, dam2, mission_flags;
+ int dam = 0, dam2;
natid plane_owner = 0;
int md, range, air_dam = 0;
double hitchance, vrange;
/* Split off the escorts at this base into e */
divide(&escorts, &e, air->x, air->y);
- mission_flags = 0;
- mission_flags |= P_X; /* stealth (shhh) */
- mission_flags |= P_H; /* gets turned off if not all choppers */
-
- mission_flags = mission_pln_arm(&b, air->x, air->y, 2 * md, 'p', 0,
- 0, mission_flags);
+ mission_pln_arm(&b, air->x, air->y, 2 * md, 'p', 0, 0);
if (QEMPTY(&b))
continue;
- mission_flags = mission_pln_arm(&e, air->x, air->y, 2 * md, 'p', 0,
- P_F | P_ESC, mission_flags);
+ mission_pln_arm(&e, air->x, air->y, 2 * md, 'p', 0, P_F | P_ESC);
pp = BestAirPath(buf, air->x, air->y, x, y);
if (CANT_HAPPEN(!pp))
xyas(x, y, air->own));
}
- ac_encounter(&b, &e, air->x, air->y, pp, mission_flags, 0);
+ ac_encounter(&b, &e, air->x, air->y, pp, 0);
if (!QEMPTY(&b))
air_dam +=
return "a mysterious";
}
-void
-show_mission(int type, struct nstr_item *np)
-{
- int first = 1, radius;
- union empobj_storage item;
- struct empobj *gp;
- struct sctstr sect;
-
- while (nxtitem(np, &item)) {
- gp = (struct empobj *)&item;
- if (!player->owner || gp->own == 0)
- continue;
-
- if (first) {
- pr("Thing x,y op-sect rad mission\n");
- first = 0;
- }
- pr("%-25s", obj_nameof(gp));
- prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
- switch (gp->mission) {
- case MI_INTERDICT:
- case MI_SUPPORT:
- case MI_AIR_DEFENSE:
- case MI_DSUPPORT:
- case MI_OSUPPORT:
- radius = gp->radius;
- oprange(gp, &radius);
- prxy(" %3d,%-3d", gp->opx, gp->opy, player->cnum);
- pr(" %4d", radius);
- break;
- case MI_RESERVE:
- radius = item.land.lnd_rad_max;
-
- if (radius) {
- radius += 2;
- getsect(gp->x, gp->y, §);
- if ((sect.sct_type == SCT_HEADQ) && (sect.sct_effic >= 60))
- radius++;
- }
- prxy(" %3d,%-3d", gp->x, gp->y, player->cnum);
- pr(" %4d", radius);
- break;
- case MI_ESCORT:
- pr(" ");
- pr(" %4d", item.plane.pln_range / 2);
- break;
- default:
- CANT_REACH();
- /* fall through */
- case MI_NONE:
- pr(" ");
- }
- if (gp->mission)
- pr(" is on %s mission\n", mission_name(gp->mission));
- else
- pr(" has no mission.\n");
- }
-}
-
+/*
+ * Maximum distance GP can perform its mission.
+ * Note: this has nothing to do with the radius of the op-area.
+ * oprange() governs where the unit *can* strike, the op-area governs
+ * where the player wants it to strike.
+ */
int
-oprange(struct empobj *gp, int *radius)
+oprange(struct empobj *gp)
{
- int range;
-
switch (gp->ef_type) {
case EF_SHIP:
- range = ldround(shp_fire_range((struct shpstr *)gp), 1);
- break;
+ return ldround(shp_fire_range((struct shpstr *)gp), 1);
case EF_LAND:
- range = ldround(lnd_fire_range((struct lndstr *)gp), 1);
- break;
+ if (gp->mission == MI_RESERVE)
+ return lnd_reaction_range((struct lndstr *)gp);
+ return ldround(lnd_fire_range((struct lndstr *)gp), 1);
case EF_PLANE:
/* missiles go one way, so we can use all the range */
if (plchr[(int)gp->type].pl_flags & P_M)
- range = ((struct plnstr *)gp)->pln_range;
- else
- range = ((struct plnstr *)gp)->pln_range / 2;
- break;
- default:
- CANT_REACH();
- range = -1;
+ return ((struct plnstr *)gp)->pln_range;
+ return ((struct plnstr *)gp)->pln_range / 2;
}
+ CANT_REACH();
+ return -1;
+}
- if (*radius > range)
- *radius = range;
-
- return range;
+/*
+ * Does GP's mission op area cover X,Y?
+ */
+int
+in_oparea(struct empobj *gp, coord x, coord y)
+{
+ return mapdist(x, y, gp->opx, gp->opy) <= gp->radius
+ && mapdist(x, y, gp->x, gp->y) <= oprange(gp);
}
/*
free(qp);
continue;
}
-
+
if (pcp->pl_flags & P_A) {
if (roll(100) > pln_identchance(pp, hardtarget, EF_SHIP)) {
emp_remque(qp);
/*
* Arm only the planes at x,y
*/
-static int
+static void
mission_pln_arm(struct emp_qelem *list, coord x, coord y, int dist,
- int mission, struct ichrstr *ip, int flags,
- int mission_flags)
+ int mission, struct ichrstr *ip, int flags)
{
struct emp_qelem *qp;
struct emp_qelem *next;
free(qp);
continue;
}
- if (flags & (P_S | P_I)) {
- if (plp->pcp->pl_flags & P_S)
- mission_flags |= P_S;
- if (plp->pcp->pl_flags & P_I)
- mission_flags |= P_I;
- }
- if (!(plp->pcp->pl_flags & P_H))
- /* no stealth on this mission */
- mission_flags &= ~P_H;
- if (!(plp->pcp->pl_flags & P_X))
- /* no stealth on this mission */
- mission_flags &= ~P_X;
- if (!(plp->pcp->pl_flags & P_A)) {
- /* no asw on this mission */
- mission_flags &= ~P_A;
- }
- if (!(plp->pcp->pl_flags & P_MINE)) {
- /* no asw on this mission */
- mission_flags &= ~P_MINE;
- }
pp->pln_flags |= PLN_LAUNCHED;
pp->pln_mobil -= pln_mobcost(dist, pp, flags);
putplane(pp->pln_uid, pp);
}
- return mission_flags;
}
int
if (itype != I_NONE && needed <= 0)
return -1;
if (itype != I_NONE) {
- if (itype == I_SHELL && item[itype] < needed)
- item[itype] += supply_commod(plp->plane.pln_own,
- plp->plane.pln_x,
- plp->plane.pln_y,
- I_SHELL, needed);
+ if (itype == I_SHELL && item[itype] < needed) {
+ if (pp->pln_ship >= 0)
+ shp_supply(&ship, I_SHELL, needed);
+ else if (pp->pln_land >= 0)
+ lnd_supply(&land, I_SHELL, needed);
+ else
+ sct_supply(§, I_SHELL, needed);
+ }
if (item[itype] < needed)
return -1;
item[itype] -= needed;
return dam;
}
-
-/*
- * Check to see if anyone hostile to the victim
- * is running an air defense mission on this
- * sector. If so, do air combat
- */
-int
-air_defense(coord x, coord y, natid victim, struct emp_qelem *bomb_list,
- struct emp_qelem *esc_list)
-{
- int dam = 0, cn;
- int mission_flags, combat = 0, rel, dist, z;
- struct emp_qelem *qp, interceptors, airp, i, empty, *next;
- struct plist *plp;
- struct genlist *glp;
- struct empobj *gp;
- struct genlist mi[MAXNOC];
- char buf[512];
- char *path;
- int count;
- int tcount;
-
- count = 0;
- for (qp = bomb_list->q_forw; qp != bomb_list; qp = qp->q_forw)
- count++;
- for (qp = esc_list->q_forw; qp != esc_list; qp = qp->q_forw)
- count++;
-
- memset(mi, 0, sizeof(mi));
- for (z = 1; z < MAXNOC; z++)
- emp_initque((struct emp_qelem *)&mi[z]);
-
- build_mission_list_type(mi, x, y, MI_AIR_DEFENSE, EF_PLANE, victim);
-
- for (cn = 1; cn < MAXNOC; cn++) {
- /* Check our relations */
- rel = getrel(getnatp(cn), victim);
-
- if (rel > HOSTILE)
- continue;
-
- if (QEMPTY(&mi[cn].queue))
- continue;
-
- /* Ok, make a list of all the interceptors. Note that this *copies* the
- * list from the mission creation. This list must be deleted later. */
- emp_initque(&interceptors);
- for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
- next = qp->q_forw;
- glp = (struct genlist *)qp;
- gp = glp->thing;
- if (CANT_HAPPEN(gp->ef_type != EF_PLANE))
- break;
-
- dist = mapdist(x, y, gp->x, gp->y);
-
- plp = malloc(sizeof(struct plist));
- memset(plp, 0, sizeof(struct plist));
- plp->pcp = glp->cp;
- memcpy(&plp->plane, glp->thing, sizeof(struct plnstr));
-
- /* missiles go one way, so we can use all the range */
- if (!(plp->pcp->pl_flags & P_M))
- dist *= 2;
- /* If it's out of range, free it and continue on */
- if (dist > plp->plane.pln_range) {
- free(plp);
- continue;
- }
- emp_insque(&plp->queue, &interceptors);
- }
-
- /* Remove those who cannot go */
- mission_pln_sel(&interceptors, P_F, 0, SECT_HARDTARGET);
-
- if (QEMPTY(&interceptors))
- continue;
-
- /* Now, delete all the extras, but delete the first ones, not the last ones, so
- * that the higher numbered planes go into battle (they should be the better ones
- * at fighting, if all went well.) */
- tcount = 0;
- for (qp = interceptors.q_forw; qp != (&interceptors);
- qp = qp->q_forw)
- tcount++;
- tcount -= count * 2;
- /* Just in case there are more incoming than we have */
- if (tcount < 0)
- tcount = 0;
- for (qp = interceptors.q_forw; qp != (&interceptors); qp = next) {
- next = qp->q_forw;
- if (tcount) {
- tcount--;
- /* Free it up and continue */
- emp_remque(qp);
- glp = (struct genlist *)qp;
- free(glp);
- }
- }
-
- /* Now, make a list of all the airports these planes are coming from */
- emp_initque(&airp);
- for (qp = interceptors.q_forw; qp != (&interceptors);
- qp = qp->q_forw) {
- plp = (struct plist *)qp;
- if (!find_airport(&airp, plp->plane.pln_x, plp->plane.pln_y))
- add_airport(&airp, plp->plane.pln_x, plp->plane.pln_y);
- }
-
- /* Now, fly them out one airport at a time */
- for (qp = airp.q_forw; qp != (&airp); qp = qp->q_forw) {
- struct airport *air;
-
- air = (struct airport *)qp;
- dist = mapdist(x, y, air->x, air->y);
-
- emp_initque(&i);
-
- /* Split off the interceptors at this base into i */
- divide(&interceptors, &i, air->x, air->y);
-
- mission_flags = 0;
- mission_flags |= P_X; /* stealth (shhh) */
- /* gets turned off if not all choppers */
- mission_flags |= P_H;
- sam_intercept(bomb_list, &i, cn, victim, x, y, 0);
- sam_intercept(esc_list, &i, cn, victim, x, y, 1);
-
- /* Did we run out of interceptors? */
- if (QEMPTY(&i))
- continue;
- /* Did we run out of bombers? */
- if (QEMPTY(bomb_list)) {
- /* Yes, so we have to put the rest of the interceptors back, and
- then continue, or we leak memory */
- pln_put(&i);
- continue;
- }
- mission_flags =
- mission_pln_arm(&i, air->x, air->y, 2 * dist, 0, 0, P_F,
- mission_flags);
-
- /* Did we run out of interceptors? */
- if (QEMPTY(&i))
- continue;
- /* Did we run out of bombers? */
- if (QEMPTY(bomb_list)) {
- /* Yes, so we have to put the rest of the interceptors back, and
- then continue, or we leak memory */
- pln_put(&i);
- continue;
- }
-
- path = BestAirPath(buf, air->x, air->y, x, y);
- if (CANT_HAPPEN(!path)) {
- pln_put(&i);
- continue;
- }
- wu(0, cn, "Flying %s mission from %s to %s\n",
- mission_name(MI_AIR_DEFENSE),
- xyas(air->x, air->y, cn),
- xyas(x, y, cn));
- if (air->own && (air->own != cn)) {
- wu(0, air->own, "%s is flying %s mission from %s to %s\n",
- cname(cn), mission_name(MI_AIR_DEFENSE),
- xyas(air->x, air->y, air->own),
- xyas(x, y, air->own));
- }
-
- /* Now, fly the planes to the sector */
- emp_initque(&empty);
- ac_encounter(&i, &empty, air->x, air->y,
- path, mission_flags, 1);
-
- /* If none made it, continue */
- if (QEMPTY(&i))
- continue;
-
- /* Some made it, so now they get to try to fight. */
- /* Intercept the escorts first */
- combat = 0;
- if (!QEMPTY(esc_list)) {
- mpr(victim, "%s air defense planes intercept!\n",
- cname(cn));
- ac_combat_headers(victim, cn);
- ac_airtoair(esc_list, &i);
- combat = 1;
- }
- /* Now intercept the bombers */
- if (!QEMPTY(bomb_list)) {
- if (!combat) {
- mpr(victim, "%s air defense planes intercept!\n",
- cname(cn));
- ac_combat_headers(victim, cn);
- }
- ac_airtoair(bomb_list, &i);
- PR(cn, "\n");
- PR(victim, "\n");
- }
-
- pln_put(&i);
- }
- if (CANT_HAPPEN(!QEMPTY(&interceptors)))
- pln_put(&interceptors);
- }
-
- /* We have to free all of these, if they are still there, otherwise they get
- lost and we leak memory all over the place. */
- for (cn = 1; cn < MAXNOC; cn++) {
- /* free up all this memory if it's still there */
- for (qp = mi[cn].queue.q_forw; qp != (&mi[cn].queue); qp = next) {
- next = qp->q_forw;
- glp = (struct genlist *)qp;
- free(glp->thing);
- free(glp);
- }
- }
-
- return dam;
-}
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