376 lines
10 KiB
C
376 lines
10 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2009, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See files README, COPYING and CREDITS in the root of the source
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* tree for related information and legal notices. It is expected
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* that future projects/authors will amend these files as needed.
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*
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* ---
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*
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* laun.c: Launch missiles from land or sea
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*
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* Known contributors to this file:
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* Dave Pare, 1986
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* Ken Stevens, 1995
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* Steve McClure, 1998-2000
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* Markus Armbruster, 2005-2008
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*/
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#include <config.h>
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#include "commands.h"
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#include "damage.h"
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#include "mission.h"
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#include "news.h"
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#include "nuke.h"
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#include "optlist.h"
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#include "path.h"
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#include "plane.h"
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#include "ship.h"
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static int launch_as(struct plnstr *pp);
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static int launch_missile(struct plnstr *pp, int sublaunch);
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static int launch_sat(struct plnstr *pp, int sublaunch);
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/*
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* laun <PLANES>
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*/
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int
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laun(void)
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{
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struct nstr_item nstr;
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struct plnstr plane;
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struct shpstr ship;
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int sublaunch;
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struct plchrstr *pcp;
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int retval, gone;
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if (!snxtitem(&nstr, EF_PLANE, player->argp[1], NULL))
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return RET_SYN;
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while (nxtitem(&nstr, &plane)) {
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if (plane.pln_own != player->cnum)
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continue;
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pcp = &plchr[(int)plane.pln_type];
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if ((pcp->pl_flags & (P_M | P_O)) == 0) {
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pr("%s isn't a missile!\n", prplane(&plane));
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continue;
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}
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if (pcp->pl_flags & P_F) {
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pr("%s is a surface-to-air missile!\n", prplane(&plane));
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continue;
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}
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if (pcp->pl_flags & P_N) {
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pr("%s is an anti-ballistic-missile missile!\n",
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prplane(&plane));
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continue;
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}
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if (pln_is_in_orbit(&plane)) {
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pr("%s already in orbit!\n", prplane(&plane));
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continue;
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}
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if (opt_MARKET) {
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if (ontradingblock(EF_PLANE, &plane)) {
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pr("plane #%d inelligible - it's for sale.\n",
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plane.pln_uid);
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continue;
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}
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}
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if (plane.pln_effic < 40) {
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pr("%s is damaged (%d%%)\n", prplane(&plane), plane.pln_effic);
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continue;
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}
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if (!pln_airbase_ok(&plane, 1, 1))
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continue;
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sublaunch = 0;
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if (plane.pln_ship >= 0) {
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getship(plane.pln_ship, &ship);
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if (mchr[(int)ship.shp_type].m_flags & M_SUB)
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sublaunch = 1;
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}
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pr("%s at %s; range %d, eff %d%%\n", prplane(&plane),
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xyas(plane.pln_x, plane.pln_y, player->cnum),
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plane.pln_range, plane.pln_effic);
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if (!(pcp->pl_flags & P_O)) {
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retval = launch_missile(&plane, sublaunch);
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gone = 1;
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} else if ((pcp->pl_flags & (P_M | P_O)) == (P_M | P_O)) {
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retval = launch_as(&plane);
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gone = 1;
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} else { /* satellites */
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retval = launch_sat(&plane, sublaunch);
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gone = !(plane.pln_flags & PLN_LAUNCHED);
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}
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if (retval != RET_OK)
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return retval;
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if (gone) {
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plane.pln_effic = 0;
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putplane(plane.pln_uid, &plane);
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}
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}
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return RET_OK;
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}
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/*
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* Launch anti-sat weapon PP.
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* Return RET_OK if launched (even when missile explodes),
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* else RET_SYN or RET_FAIL.
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*/
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static int
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launch_as(struct plnstr *pp)
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{
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char *cp, buf[1024];
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struct plnstr plane;
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cp = getstarg(player->argp[2], "Target satellite? ", buf);
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if (!check_plane_ok(pp))
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return RET_FAIL;
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if (!cp || !*cp)
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return RET_SYN;
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if (!getplane(atoi(cp), &plane) || !plane.pln_own
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|| !pln_is_in_orbit(&plane)) {
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pr("No such satellite exists!\n");
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return RET_FAIL;
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/* Can be abused to find satellite ids. Tolerable. */
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}
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if (mapdist(pp->pln_x, pp->pln_y, plane.pln_x, plane.pln_y)
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> pp->pln_range) {
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pr("Range too great!\n");
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return RET_FAIL;
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}
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if (msl_equip(pp, 'i') < 0)
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return RET_FAIL;
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if (msl_hit(pp, pln_def(&plane), EF_PLANE, N_SAT_KILL, N_SAT_KILL,
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prplane(&plane), plane.pln_x, plane.pln_y, plane.pln_own)) {
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pr("Satellite shot down\n");
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mpr(plane.pln_own, "%s anti-sat destroyed %s over %s\n",
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cname(player->cnum), prplane(&plane),
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xyas(plane.pln_x, plane.pln_y, plane.pln_own));
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plane.pln_effic = 0;
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putplane(plane.pln_uid, &plane);
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}
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return RET_OK;
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}
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/*
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* Launch missile PP.
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* If SUBLAUNCH, it's sub-launched.
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* Return RET_OK if launched (even when missile explodes),
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* else RET_SYN or RET_FAIL.
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*/
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static int
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launch_missile(struct plnstr *pp, int sublaunch)
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{
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struct plchrstr *pcp = plchr + pp->pln_type;
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coord sx, sy;
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int n, dam;
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char *cp;
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struct mchrstr *mcp;
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struct shpstr target_ship;
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struct sctstr sect;
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int rel;
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struct natstr *natp;
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struct nukstr nuke;
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char buf[1024];
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if (pcp->pl_flags & P_MAR)
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cp = getstarg(player->argp[2], "Target ship? ", buf);
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else
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cp = getstarg(player->argp[2], "Target sector? ", buf);
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if (!cp || !*cp)
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return RET_SYN;
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if (!check_plane_ok(pp))
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return RET_FAIL;
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if (sarg_type(cp) == NS_LIST) {
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if (!(pcp->pl_flags & P_MAR)) {
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pr("Missile not designed to attack ships!\n");
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return RET_FAIL;
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}
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n = atoi(cp);
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if ((n < 0) || !getship(n, &target_ship) ||
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!target_ship.shp_own) {
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pr("Bad ship number!\n");
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return RET_FAIL;
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}
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sx = target_ship.shp_x;
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sy = target_ship.shp_y;
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mcp = &mchr[(int)target_ship.shp_type];
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if (mcp->m_flags & M_SUB) {
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pr("Bad ship number!\n");
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return RET_FAIL;
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}
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} else if (!sarg_xy(cp, &sx, &sy)) {
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pr("Not a sector!\n");
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return RET_FAIL;
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} else {
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if (pcp->pl_flags & P_MAR) {
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pr("Missile designed to attack ships!\n");
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return RET_FAIL;
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}
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}
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if (mapdist(pp->pln_x, pp->pln_y, sx, sy) > pp->pln_range) {
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pr("Range too great; try again!\n");
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return RET_FAIL;
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}
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if (!(pcp->pl_flags & P_MAR)) {
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if (msl_equip(pp, 's') < 0)
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return RET_FAIL;
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getsect(sx, sy, §);
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if (opt_SLOW_WAR) {
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natp = getnatp(player->cnum);
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rel = getrel(natp, sect.sct_own);
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if ((rel != AT_WAR) && (sect.sct_own != player->cnum) &&
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(sect.sct_own) && (sect.sct_oldown != player->cnum)) {
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pr("You are not at war with the player->owner of the target sector!\n");
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pr_beep();
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pr("Kaboom!!!\n");
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pr("Missile monitoring officer destroys RV before detonation.\n");
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return RET_OK;
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}
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}
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if (!msl_hit(pp, SECT_HARDTARGET, EF_SECTOR, N_SCT_MISS,
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N_SCT_SMISS, "sector", sx, sy, sect.sct_own)) {
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#if 0
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/*
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* FIXME want collateral damage on miss, but we get here
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* too when launch fails or missile is intercepted
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*/
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dam = pln_damage(pp, 's', 0);
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collateral_damage(sect.sct_x, sect.sct_y, dam, 0);
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#endif
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return RET_OK;
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}
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if (getnuke(nuk_on_plane(pp), &nuke))
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detonate(&nuke, sx, sy, pp->pln_flags & PLN_AIRBURST);
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else {
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dam = pln_damage(pp, 's', 1);
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pr("did %d damage in %s\n", PERCENT_DAMAGE(dam),
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xyas(sx, sy, player->cnum));
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if (sect.sct_own != 0) {
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if (sublaunch)
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wu(0, sect.sct_own,
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"Sub missile attack did %d damage in %s\n",
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dam, xyas(sx, sy, sect.sct_own));
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else
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wu(0, sect.sct_own,
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"%s missile attack did %d damage in %s\n",
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cname(player->cnum), dam,
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xyas(sx, sy, sect.sct_own));
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}
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sectdamage(§, dam);
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putsect(§);
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}
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} else {
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if (msl_equip(pp, 'p') < 0)
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return RET_FAIL;
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if (!msl_hit(pp, shp_hardtarget(&target_ship), EF_SHIP,
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N_SHP_MISS, N_SHP_SMISS, prship(&target_ship),
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target_ship.shp_x, target_ship.shp_y,
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target_ship.shp_own)) {
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pr("splash\n");
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#if 0 /* FIXME see above */
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dam = pln_damage(pp, 'p', 0);
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collateral_damage(target_ship.shp_x, target_ship.shp_y, dam, 0);
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#endif
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return RET_OK;
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}
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dam = pln_damage(pp, 'p', 1);
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check_retreat_and_do_shipdamage(&target_ship, dam);
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putship(target_ship.shp_uid, &target_ship);
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getship(target_ship.shp_uid, &target_ship);
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if (!target_ship.shp_own)
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pr("%s sunk!\n", prship(&target_ship));
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}
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return RET_OK;
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}
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/*
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* Launch a satellite.
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* Return RET_OK if launched (even when satellite fails),
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* else RET_SYN or RET_FAIL.
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*/
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static int
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launch_sat(struct plnstr *pp, int sublaunch)
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{
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struct plchrstr *pcp = plchr + pp->pln_type;
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coord sx, sy;
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int i;
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int dist;
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int dir;
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char *cp;
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char *p;
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char buf[1024];
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pr("\n");
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cp = getstarg(player->argp[2], "Target sector? ", buf);
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if (!check_plane_ok(pp))
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return RET_FAIL;
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if (!cp || !*cp)
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return RET_SYN;
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if (!sarg_xy(cp, &sx, &sy)) {
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pr("Bad sector designation!\n");
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return RET_SYN;
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}
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if ((dist = mapdist(pp->pln_x, pp->pln_y, sx, sy)) > pp->pln_range) {
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pr("Range too great; try again!\n");
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return RET_FAIL;
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}
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p = getstring("Geostationary orbit? ", buf);
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if (!p)
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return RET_SYN;
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if (!check_plane_ok(pp))
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return RET_FAIL;
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if (msl_equip(pp, 'r') < 0)
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return RET_FAIL;
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pp->pln_theta = 0;
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pp->pln_flags |= PLN_SYNCHRONOUS;
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if (*p == 0 || *p == 'n')
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pp->pln_flags &= ~(PLN_SYNCHRONOUS);
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pr("3... 2... 1... Blastoff!!!\n");
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if (chance(0.07 + (100 - pp->pln_effic) / 100.0)) {
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pr("KABOOOOM! Range safety officer detonates booster!\n");
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pp->pln_effic = 0;
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return RET_OK;
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}
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i = pp->pln_tech + pp->pln_effic;
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if (chance(1.0 - (i / (i + 50.0)))) {
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dir = (random() % 6) + 1;
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sx = xnorm(sx + diroff[dir][0]);
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sy = ynorm(sy + diroff[dir][1]);
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pr("Your trajectory was a little off.\n");
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}
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nreport(player->cnum, N_LAUNCH, 0, 1);
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if (msl_intercept(sx, sy, pp->pln_own, pcp->pl_def, sublaunch, P_O, 0)) {
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return RET_OK;
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}
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pp->pln_x = sx;
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pp->pln_y = sy;
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CANT_HAPPEN(pp->pln_flags & PLN_LAUNCHED);
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pp->pln_flags |= PLN_LAUNCHED;
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pp->pln_mobil = pp->pln_mobil > dist ? pp->pln_mobil - dist : 0;
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putplane(pp->pln_uid, pp);
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pr("%s positioned over %s, will be ready for use in %d time units\n",
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prplane(pp), xyas(sx, sy, player->cnum),
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plane_mob_max - pp->pln_mobil);
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return RET_OK;
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}
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