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- /*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)dr_3.c 5.4 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- #include "driver.h"
-
- moveall() /* move all comp ships */
- {
- register struct ship *sp, *sq; /* r11, r10 */
- register int n; /* r9 */
- register int k, l; /* r8, r7 */
- int row[NSHIP], col[NSHIP], dir[NSHIP], drift[NSHIP];
- char moved[NSHIP];
-
- /*
- * first try to create moves for OUR ships
- */
- foreachship(sp) {
- struct ship *closest;
- int ma, ta;
- char af;
-
- if (sp->file->captain[0] || sp->file->dir == 0)
- continue;
- if (!sp->file->struck && windspeed && !snagged(sp)
- && sp->specs->crew3) {
- ta = maxturns(sp, &af);
- ma = maxmove(sp, sp->file->dir, 0);
- closest = closestenemy(sp, 0, 0);
- if (closest == 0)
- *sp->file->movebuf = '\0';
- else
- closeon(sp, closest, sp->file->movebuf,
- ta, ma, af);
- } else
- *sp->file->movebuf = '\0';
- }
- /*
- * Then execute the moves for ALL ships (dead ones too),
- * checking for collisions and snags at each step.
- * The old positions are saved in row[], col[], dir[].
- * At the end, we compare and write out the changes.
- */
- n = 0;
- foreachship(sp) {
- if (snagged(sp))
- (void) strcpy(sp->file->movebuf, "d");
- else
- if (*sp->file->movebuf != 'd')
- (void) strcat(sp->file->movebuf, "d");
- row[n] = sp->file->row;
- col[n] = sp->file->col;
- dir[n] = sp->file->dir;
- drift[n] = sp->file->drift;
- moved[n] = 0;
- n++;
- }
- /*
- * Now resolve collisions.
- * This is the tough part.
- */
- for (k = 0; stillmoving(k); k++) {
- /*
- * Step once.
- * And propagate the nulls at the end of sp->file->movebuf.
- */
- n = 0;
- foreachship(sp) {
- if (!sp->file->movebuf[k])
- sp->file->movebuf[k+1] = '\0';
- else if (sp->file->dir)
- step(sp->file->movebuf[k], sp, &moved[n]);
- n++;
- }
- /*
- * The real stuff.
- */
- n = 0;
- foreachship(sp) {
- if (sp->file->dir == 0 || isolated(sp))
- goto cont1;
- l = 0;
- foreachship(sq) {
- char snap = 0;
-
- if (sp == sq)
- goto cont2;
- if (sq->file->dir == 0)
- goto cont2;
- if (!push(sp, sq))
- goto cont2;
- if (snagged2(sp, sq) && range(sp, sq) > 1)
- snap++;
- if (!range(sp, sq) && !fouled2(sp, sq)) {
- makesignal(sp,
- "collision with %s (%c%c)", sq);
- if (die() < 4) {
- makesignal(sp,
- "fouled with %s (%c%c)",
- sq);
- Write(W_FOUL, sp, 0, l, 0, 0, 0);
- Write(W_FOUL, sq, 0, n, 0, 0, 0);
- }
- snap++;
- }
- if (snap) {
- sp->file->movebuf[k + 1] = 0;
- sq->file->movebuf[k + 1] = 0;
- sq->file->row = sp->file->row - 1;
- if (sp->file->dir == 1
- || sp->file->dir == 5)
- sq->file->col =
- sp->file->col - 1;
- else
- sq->file->col = sp->file->col;
- sq->file->dir = sp->file->dir;
- }
- cont2:
- l++;
- }
- cont1:
- n++;
- }
- }
- /*
- * Clear old moves. And write out new pos.
- */
- n = 0;
- foreachship(sp) {
- if (sp->file->dir != 0) {
- *sp->file->movebuf = 0;
- if (row[n] != sp->file->row)
- Write(W_ROW, sp, 0, sp->file->row, 0, 0, 0);
- if (col[n] != sp->file->col)
- Write(W_COL, sp, 0, sp->file->col, 0, 0, 0);
- if (dir[n] != sp->file->dir)
- Write(W_DIR, sp, 0, sp->file->dir, 0, 0, 0);
- if (drift[n] != sp->file->drift)
- Write(W_DRIFT, sp, 0, sp->file->drift, 0, 0, 0);
- }
- n++;
- }
- }
-
- stillmoving(k)
- register int k;
- {
- register struct ship *sp;
-
- foreachship(sp)
- if (sp->file->movebuf[k])
- return 1;
- return 0;
- }
-
- isolated(ship)
- register struct ship *ship;
- {
- register struct ship *sp;
-
- foreachship(sp) {
- if (ship != sp && range(ship, sp) <= 10)
- return 0;
- }
- return 1;
- }
-
- push(from, to)
- register struct ship *from, *to;
- {
- register int bs, sb;
-
- sb = to->specs->guns;
- bs = from->specs->guns;
- if (sb > bs)
- return 1;
- if (sb < bs)
- return 0;
- return from < to;
- }
-
- step(com, sp, moved)
- char com;
- register struct ship *sp;
- char *moved;
- {
- register int dist;
-
- switch (com) {
- case 'r':
- if (++sp->file->dir == 9)
- sp->file->dir = 1;
- break;
- case 'l':
- if (--sp->file->dir == 0)
- sp->file->dir = 8;
- break;
- case '0': case '1': case '2': case '3':
- case '4': case '5': case '6': case '7':
- if (sp->file->dir % 2 == 0)
- dist = dtab[com - '0'];
- else
- dist = com - '0';
- sp->file->row -= dr[sp->file->dir] * dist;
- sp->file->col -= dc[sp->file->dir] * dist;
- *moved = 1;
- break;
- case 'b':
- break;
- case 'd':
- if (!*moved) {
- if (windspeed != 0 && ++sp->file->drift > 2 &&
- (sp->specs->class >= 3 && !snagged(sp)
- || (turn & 1) == 0)) {
- sp->file->row -= dr[winddir];
- sp->file->col -= dc[winddir];
- }
- } else
- sp->file->drift = 0;
- break;
- }
- }
-
- sendbp(from, to, sections, isdefense)
- register struct ship *from, *to;
- int sections;
- char isdefense;
- {
- int n;
- register struct BP *bp;
-
- bp = isdefense ? from->file->DBP : from->file->OBP;
- for (n = 0; n < NBP && bp[n].turnsent; n++)
- ;
- if (n < NBP && sections) {
- Write(isdefense ? W_DBP : W_OBP, from, 0,
- n, turn, to->file->index, sections);
- if (isdefense)
- makesignal(from, "repelling boarders",
- (struct ship *)0);
- else
- makesignal(from, "boarding the %s (%c%c)", to);
- }
- }
-
- toughmelee(ship, to, isdefense, count)
- register struct ship *ship, *to;
- int isdefense, count;
- {
- register struct BP *bp;
- register obp = 0;
- int n, OBP = 0, DBP = 0, dbp = 0;
- int qual;
-
- qual = ship->specs->qual;
- bp = isdefense ? ship->file->DBP : ship->file->OBP;
- for (n = 0; n < NBP; n++, bp++) {
- if (bp->turnsent && (to == bp->toship || isdefense)) {
- obp += bp->mensent / 100
- ? ship->specs->crew1 * qual : 0;
- obp += (bp->mensent % 100)/10
- ? ship->specs->crew2 * qual : 0;
- obp += bp->mensent % 10
- ? ship->specs->crew3 * qual : 0;
- }
- }
- if (count || isdefense)
- return obp;
- OBP = toughmelee(to, ship, 0, count + 1);
- dbp = toughmelee(ship, to, 1, count + 1);
- DBP = toughmelee(to, ship, 1, count + 1);
- if (OBP > obp + 10 || OBP + DBP >= obp + dbp + 10)
- return 1;
- else
- return 0;
- }
-
- reload()
- {
- register struct ship *sp;
-
- foreachship(sp) {
- sp->file->loadwith = 0;
- }
- }
-
- checksails()
- {
- register struct ship *sp;
- register int rig, full;
- struct ship *close;
-
- foreachship(sp) {
- if (sp->file->captain[0] != 0)
- continue;
- rig = sp->specs->rig1;
- if (windspeed == 6 || windspeed == 5 && sp->specs->class > 4)
- rig = 0;
- if (rig && sp->specs->crew3) {
- close = closestenemy(sp, 0, 0);
- if (close != 0) {
- if (range(sp, close) > 9)
- full = 1;
- else
- full = 0;
- } else
- full = 0;
- } else
- full = 0;
- if ((sp->file->FS != 0) != full)
- Write(W_FS, sp, 0, full, 0, 0, 0);
- }
- }
-