2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * para.c: Drop paratroopers onto a sector
29 * Known contributors to this file:
32 * Markus Armbruster, 2004-2011
44 static int paradrop(struct emp_qelem *list, coord x, coord y);
52 char flightpath[MAX_PATH_LEN];
53 struct nstr_item ni_bomb;
54 struct nstr_item ni_esc;
56 struct emp_qelem bomb_list;
57 struct emp_qelem esc_list;
58 struct sctstr ap_sect;
61 if (get_planes(&ni_bomb, &ni_esc, player->argp[1], player->argp[2]) < 0)
63 if (!get_assembly_point(player->argp[3], &ap_sect, buf))
67 if (!getpath(flightpath, player->argp[4], ax, ay, 0, 0, MOB_FLY))
71 (void)pathtoxy(flightpath, &tx, &ty, fcost);
72 getsect(tx, ty, &target);
73 pr("LZ is %s\n", xyas(tx, ty, player->cnum));
74 ap_to_target = strlen(flightpath);
75 pr("range to target is %d\n", ap_to_target);
76 if (target.sct_own == player->cnum) {
77 pr("You can't air-assault your own sector!\n");
81 * select planes within range
83 pln_sel(&ni_bomb, &bomb_list, &ap_sect, ap_to_target, 2,
84 P_P | P_C, P_M | P_O);
85 pln_sel(&ni_esc, &esc_list, &ap_sect, ap_to_target, 2,
86 P_ESC | P_F, P_M | P_O);
88 * now arm and equip the bombers, transports, whatever.
90 pln_arm(&bomb_list, 2 * ap_to_target, 'a', NULL);
91 if (QEMPTY(&bomb_list)) {
92 pr("No planes could be equipped for the mission.\n");
95 pln_arm(&esc_list, 2 * ap_to_target, 'e', NULL);
96 ac_encounter(&bomb_list, &esc_list, ax, ay, flightpath, 0);
97 if (QEMPTY(&bomb_list)) {
98 pr("No planes got through fighter defenses\n");
100 getsect(tx, ty, &target);
101 paradrop(&bomb_list, tx, ty);
109 paradrop(struct emp_qelem *list, coord x, coord y)
111 struct combat off[1]; /* assaulting ship or sector */
112 struct combat def[1]; /* defending ship */
113 struct emp_qelem olist; /* assaulting units */
114 struct emp_qelem dlist; /* defending units */
115 int ototal; /* total assaulting strength */
116 int a_engineer = 0; /* assaulter engineers are present */
117 int a_spy = 0; /* the best assaulter scout */
118 double osupport = 1.0; /* assault support */
119 double dsupport = 1.0; /* defense support */
121 struct emp_qelem *qp;
123 /* Check for valid attack */
125 att_combat_init(def, EF_SECTOR);
128 if (att_abort(A_PARA, NULL, def))
131 /* Show what we're air-assaulting */
134 /* set what we're air-assaulting with */
137 att_combat_init(off, EF_PLANE);
138 for (qp = list->q_forw; qp != list; qp = qp->q_forw) {
139 plp = (struct plist *)qp;
140 off->troops += plp->load;
142 off->mil = off->troops;
143 if (att_abort(A_PARA, off, def)) {
144 pr("Air-Assault aborted\n");
148 ototal = att_get_offense(A_PARA, off, &olist, def);
149 if (att_abort(A_PARA, off, def)) {
150 pr("Air-assault aborted\n");
154 /* Get the defense */
156 att_get_defense(&olist, def, &dlist, a_spy, ototal);
158 /* Get defender support */
160 att_get_support(A_PARA, 0, 0, 0, 0,
161 &olist, off, &dlist, def, &osupport, &dsupport,
164 if (att_abort(A_PARA, off, def)) {
165 pr("Air-assault aborted\n");
169 * Death, carnage, and destruction.
172 att_fight(A_PARA, off, &olist, osupport, def, &dlist, dsupport);