2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2011, 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 * bridgefall.c: Knock a bridge down
29 * Known contributors to this file:
31 * Markus Armbruster, 2004-2009
47 #include "prototypes.h"
51 static void knockdown(struct sctstr *);
54 * Check bridges at and around SP after damage to SP.
55 * If SP is an inefficent bridge, splash it.
56 * If SP can't support a bridge, splash unsupported adjacent bridges.
57 * Write back splashed bridges, except for SP; writing that one is
61 bridge_damaged(struct sctstr *sp)
65 if (sp->sct_effic >= SCT_MINEFF)
69 if (des == SCT_BSPAN || des == SCT_BTOWER)
71 if ((des == SCT_BHEAD || des == SCT_BTOWER) && !opt_EASY_BRIDGES)
76 bridgefall(struct sctstr *sp)
81 struct sctstr bh_sect;
87 if (CANT_HAPPEN(opt_EASY_BRIDGES))
90 for (i = 1; i <= 6; i++) {
91 nx = sp->sct_x + diroff[i][0];
92 ny = sp->sct_y + diroff[i][1];
93 getsect(nx, ny, §);
94 if (sect.sct_type != SCT_BSPAN)
96 for (j = 1; j <= 6; j++) {
97 nnx = nx + diroff[j][0];
98 nny = ny + diroff[j][1];
99 if (nnx == sp->sct_x && nny == sp->sct_y)
101 getsect(nnx, nny, &bh_sect);
102 if (bh_sect.sct_type == SCT_BHEAD &&
103 bh_sect.sct_newtype == SCT_BHEAD)
105 if (bh_sect.sct_type == SCT_BTOWER)
115 /* Knock down a bridge span. Note that this does NOT write the
116 * sector out to the database, it's up to the caller to do that. */
118 knockdown(struct sctstr *sp)
126 "Crumble... SCREEEECH! Splash! Bridge%s falls at %s!\n",
127 sp->sct_type == SCT_BTOWER ? " tower" : "",
128 xyas(sp->sct_x, sp->sct_y, sp->sct_own));
129 if (!SCT_MINES_ARE_SEAMINES(sp))
131 sp->sct_type = SCT_WATER;
132 sp->sct_newtype = SCT_WATER;
138 /* Sink all the units */
139 snxtitem_xy(&ni, EF_LAND, sp->sct_x, sp->sct_y);
140 while (nxtitem(&ni, &land)) {
141 if (land.lnd_own == 0)
143 if (land.lnd_ship >= 0)
145 mpr(land.lnd_own, " AARGH! %s tumbles to its doom!\n",
148 putland(land.lnd_uid, &land);
150 /* Sink all the planes */
151 snxtitem_xy(&ni, EF_PLANE, sp->sct_x, sp->sct_y);
152 while (nxtitem(&ni, &plane)) {
153 if (plane.pln_own == 0)
155 if (plane.pln_flags & PLN_LAUNCHED)
157 if (plane.pln_ship >= 0)
159 mpr(plane.pln_own, " AARGH! %s tumbles to its doom!\n",
162 putplane(plane.pln_uid, &plane);
164 /* Sink all the nukes */
165 snxtitem_xy(&ni, EF_NUKE, sp->sct_x, sp->sct_y);
166 while (nxtitem(&ni, &nuke)) {
167 if (nuke.nuk_own == 0)
169 if (nuke.nuk_plane >= 0)
171 mpr(nuke.nuk_own, " %s sinks to the bottom of the sea!\n",
174 putnuke(nuke.nuk_uid, &nuke);
176 memset(sp->sct_item, 0, sizeof(sp->sct_item));
177 memset(sp->sct_del, 0, sizeof(sp->sct_del));
178 memset(sp->sct_dist, 0, sizeof(sp->sct_dist));
179 sp->sct_pstage = PLG_HEALTHY;
182 sp->sct_che_target = 0;