1 /* $NetBSD: dr_3.c,v 1.19 2009/03/14 22:52:52 dholland Exp $ */
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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32 #include <sys/cdefs.h>
35 static char sccsid[] = "@(#)dr_3.c 8.1 (Berkeley) 5/31/93";
37 __RCSID("$NetBSD: dr_3.c,v 1.19 2009/03/14 22:52:52 dholland Exp $");
46 static int stillmoving(int);
47 static int is_isolated(struct ship *);
48 static int push(struct ship *, struct ship *);
49 static void step(struct ship *, int, char *);
51 /* move all comp ships */
58 int row[NSHIP], col[NSHIP], dir[NSHIP], drift[NSHIP];
62 * first try to create moves for OUR ships
69 if (sp->file->captain[0] || sp->file->dir == 0)
71 if (!sp->file->struck && windspeed && !snagged(sp)
72 && sp->specs->crew3) {
73 ta = maxturns(sp, &af);
74 ma = maxmove(sp, sp->file->dir, 0);
75 closest = closestenemy(sp, 0, 0);
77 *sp->file->movebuf = '\0';
79 closeon(sp, closest, sp->file->movebuf,
80 sizeof(sp->file->movebuf),
83 *sp->file->movebuf = '\0';
86 * Then execute the moves for ALL ships (dead ones too),
87 * checking for collisions and snags at each step.
88 * The old positions are saved in row[], col[], dir[].
89 * At the end, we compare and write out the changes.
94 strcpy(sp->file->movebuf, "d");
96 if (*sp->file->movebuf != 'd')
97 strcat(sp->file->movebuf, "d");
98 row[n] = sp->file->row;
99 col[n] = sp->file->col;
100 dir[n] = sp->file->dir;
101 drift[n] = sp->file->drift;
106 * Now resolve collisions.
107 * This is the tough part.
109 for (k = 0; stillmoving(k); k++) {
112 * And propagate the nulls at the end of sp->file->movebuf.
116 if (!sp->file->movebuf[k])
117 sp->file->movebuf[k+1] = '\0';
118 else if (sp->file->dir)
119 step(sp, sp->file->movebuf[k], &moved[n]);
127 if (sp->file->dir == 0 || is_isolated(sp))
135 if (sq->file->dir == 0)
139 if (snagged2(sp, sq) && range(sp, sq) > 1)
141 if (!range(sp, sq) && !fouled2(sp, sq)) {
142 makesignal(sp, "collision with $$", sq);
144 makesignal(sp, "fouled with $$",
152 sp->file->movebuf[k + 1] = 0;
153 sq->file->movebuf[k + 1] = 0;
154 sq->file->row = sp->file->row - 1;
155 if (sp->file->dir == 1
156 || sp->file->dir == 5)
160 sq->file->col = sp->file->col;
161 sq->file->dir = sp->file->dir;
171 * Clear old moves. And write out new pos.
175 if (sp->file->dir != 0) {
176 *sp->file->movebuf = 0;
177 if (row[n] != sp->file->row)
178 send_row(sp, sp->file->row);
179 if (col[n] != sp->file->col)
180 send_col(sp, sp->file->col);
181 if (dir[n] != sp->file->dir)
182 send_dir(sp, sp->file->dir);
183 if (drift[n] != sp->file->drift)
184 send_drift(sp, sp->file->drift);
196 if (sp->file->movebuf[k])
202 is_isolated(struct ship *ship)
207 if (ship != sp && range(ship, sp) <= 10)
214 push(struct ship *from, struct ship *to)
218 sb = to->specs->guns;
219 bs = from->specs->guns;
228 step(struct ship *sp, int com, char *moved)
234 if (++sp->file->dir == 9)
238 if (--sp->file->dir == 0)
241 case '0': case '1': case '2': case '3':
242 case '4': case '5': case '6': case '7':
243 if (sp->file->dir % 2 == 0)
244 dist = dtab[com - '0'];
247 sp->file->row -= dr[sp->file->dir] * dist;
248 sp->file->col -= dc[sp->file->dir] * dist;
255 if (windspeed != 0 && ++sp->file->drift > 2 &&
256 ((sp->specs->class >= 3 && !snagged(sp))
257 || (turn & 1) == 0)) {
258 sp->file->row -= dr[winddir];
259 sp->file->col -= dc[winddir];
269 sendbp(struct ship *from, struct ship *to, int sections, int isdefense)
274 bp = isdefense ? from->file->DBP : from->file->OBP;
275 for (n = 0; n < NBP && bp[n].turnsent; n++)
277 if (n < NBP && sections) {
279 send_dbp(from, n, turn, to->file->index, sections);
281 send_obp(from, n, turn, to->file->index, sections);
284 makemsg(from, "repelling boarders");
286 makesignal(from, "boarding the $$", to);
291 is_toughmelee(struct ship *ship, struct ship *to, int isdefense, int count)
295 int n, OBP = 0, DBP = 0, dbp = 0;
298 qual = ship->specs->qual;
299 bp = isdefense ? ship->file->DBP : ship->file->OBP;
300 for (n = 0; n < NBP; n++, bp++) {
301 if (bp->turnsent && (to == bp->toship || isdefense)) {
302 obp += bp->mensent / 100
303 ? ship->specs->crew1 * qual : 0;
304 obp += (bp->mensent % 100)/10
305 ? ship->specs->crew2 * qual : 0;
306 obp += bp->mensent % 10
307 ? ship->specs->crew3 * qual : 0;
310 if (count || isdefense)
312 OBP = is_toughmelee(to, ship, 0, count + 1);
313 dbp = is_toughmelee(ship, to, 1, count + 1);
314 DBP = is_toughmelee(to, ship, 1, count + 1);
315 if (OBP > obp + 10 || OBP + DBP >= obp + dbp + 10)
327 sp->file->loadwith = 0;
339 if (sp->file->captain[0] != 0)
341 rig = sp->specs->rig1;
342 if (windspeed == 6 || (windspeed == 5 && sp->specs->class > 4))
344 if (rig && sp->specs->crew3) {
345 close = closestenemy(sp, 0, 0);
347 if (range(sp, close) > 9)
357 if ((sp->file->FS != 0) != full)