4.3BSD - /usr/src/games/sail/dr_3.c

   1: /*
   2:  * Copyright (c) 1983 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)dr_3.c	5.1 (Berkeley) 5/29/85";
   9: #endif not lint
  10: 
  11: #include "driver.h"
  12: 
  13: moveall()       /* move all comp ships */
  14: {
  15:     register struct ship *sp, *sq;      /* r11, r10 */
  16:     register int n;             /* r9 */
  17:     register int k, l;          /* r8, r7 */
  18:     int row[NSHIP], col[NSHIP], dir[NSHIP], drift[NSHIP];
  19:     char moved[NSHIP];
  20: 
  21:     /*
  22: 	 * first try to create moves for OUR ships
  23: 	 */
  24:     foreachship(sp) {
  25:         struct ship *closest;
  26:         int ma, ta;
  27:         char af;
  28: 
  29:         if (sp->file->captain[0] || sp->file->dir == 0)
  30:             continue;
  31:         if (!sp->file->struck && windspeed && !snagged(sp)
  32:             && sp->specs->crew3) {
  33:             ta = maxturns(sp, &af);
  34:             ma = maxmove(sp, sp->file->dir, 0);
  35:             closest = closestenemy(sp, 0, 0);
  36:             if (closest == 0)
  37:                 *sp->file->movebuf = '\0';
  38:             else
  39:                 closeon(sp, closest, sp->file->movebuf,
  40:                     ta, ma, af);
  41:         } else
  42:             *sp->file->movebuf = '\0';
  43:     }
  44:     /*
  45: 	 * Then execute the moves for ALL ships (dead ones too),
  46: 	 * checking for collisions and snags at each step.
  47: 	 * The old positions are saved in row[], col[], dir[].
  48: 	 * At the end, we compare and write out the changes.
  49: 	 */
  50:     n = 0;
  51:     foreachship(sp) {
  52:         if (snagged(sp))
  53:             (void) strcpy(sp->file->movebuf, "d");
  54:         else
  55:             if (*sp->file->movebuf != 'd')
  56:                 (void) strcat(sp->file->movebuf, "d");
  57:         row[n] = sp->file->row;
  58:         col[n] = sp->file->col;
  59:         dir[n] = sp->file->dir;
  60:         drift[n] = sp->file->drift;
  61:         moved[n] = 0;
  62:         n++;
  63:     }
  64:     /*
  65: 	 * Now resolve collisions.
  66: 	 * This is the tough part.
  67: 	 */
  68:     for (k = 0; stillmoving(k); k++) {
  69:         /*
  70: 		 * Step once.
  71: 		 * And propagate the nulls at the end of sp->file->movebuf.
  72: 		 */
  73:         n = 0;
  74:         foreachship(sp) {
  75:             if (!sp->file->movebuf[k])
  76:                 sp->file->movebuf[k+1] = '\0';
  77:             else if (sp->file->dir)
  78:                 step(sp->file->movebuf[k], sp, &moved[n]);
  79:             n++;
  80:         }
  81:         /*
  82: 		 * The real stuff.
  83: 		 */
  84:         n = 0;
  85:         foreachship(sp) {
  86:             if (sp->file->dir == 0 || isolated(sp))
  87:                 goto cont1;
  88:             l = 0;
  89:             foreachship(sq) {
  90:                 char snap = 0;
  91: 
  92:                 if (sp == sq)
  93:                     goto cont2;
  94:                 if (sq->file->dir == 0)
  95:                     goto cont2;
  96:                 if (!push(sp, sq))
  97:                     goto cont2;
  98:                 if (snagged2(sp, sq) && range(sp, sq) > 1)
  99:                     snap++;
 100:                 if (!range(sp, sq) && !fouled2(sp, sq)) {
 101:                     makesignal(sp,
 102:                         "collision with %s (%c%c)", sq);
 103:                     if (die() < 4) {
 104:                         makesignal(sp,
 105:                             "fouled with %s (%c%c)",
 106:                             sq);
 107:                         Write(W_FOUL, sp, 0, l, 0, 0, 0);
 108:                         Write(W_FOUL, sq, 0, n, 0, 0, 0);
 109:                     }
 110:                     snap++;
 111:                 }
 112:                 if (snap) {
 113:                     sp->file->movebuf[k + 1] = 0;
 114:                     sq->file->movebuf[k + 1] = 0;
 115:                     sq->file->row = sp->file->row - 1;
 116:                     if (sp->file->dir == 1
 117:                         || sp->file->dir == 5)
 118:                         sq->file->col =
 119:                             sp->file->col - 1;
 120:                     else
 121:                         sq->file->col = sp->file->col;
 122:                     sq->file->dir = sp->file->dir;
 123:                 }
 124:             cont2:
 125:                 l++;
 126:             }
 127:         cont1:
 128:             n++;
 129:         }
 130:     }
 131:     /*
 132: 	 * Clear old moves.  And write out new pos.
 133: 	 */
 134:     n = 0;
 135:     foreachship(sp) {
 136:         if (sp->file->dir != 0) {
 137:             *sp->file->movebuf = 0;
 138:             if (row[n] != sp->file->row)
 139:                 Write(W_ROW, sp, 0, sp->file->row, 0, 0, 0);
 140:             if (col[n] != sp->file->col)
 141:                 Write(W_COL, sp, 0, sp->file->col, 0, 0, 0);
 142:             if (dir[n] != sp->file->dir)
 143:                 Write(W_DIR, sp, 0, sp->file->dir, 0, 0, 0);
 144:             if (drift[n] != sp->file->drift)
 145:                 Write(W_DRIFT, sp, 0, sp->file->drift, 0, 0, 0);
 146:         }
 147:         n++;
 148:     }
 149: }
 150: 
 151: stillmoving(k)
 152: register int k;
 153: {
 154:     register struct ship *sp;
 155: 
 156:     foreachship(sp)
 157:         if (sp->file->movebuf[k])
 158:             return 1;
 159:     return 0;
 160: }
 161: 
 162: isolated(ship)
 163: register struct ship *ship;
 164: {
 165:     register struct ship *sp;
 166: 
 167:     foreachship(sp) {
 168:         if (ship != sp && range(ship, sp) <= 10)
 169:             return 0;
 170:     }
 171:     return 1;
 172: }
 173: 
 174: push(from, to)
 175: register struct ship *from, *to;
 176: {
 177:     register int bs, sb;
 178: 
 179:     sb = to->specs->guns;
 180:     bs = from->specs->guns;
 181:     if (sb > bs)
 182:         return 1;
 183:     if (sb < bs)
 184:         return 0;
 185:     return from < to;
 186: }
 187: 
 188: step(com, sp, moved)
 189: char com;
 190: register struct ship *sp;
 191: char *moved;
 192: {
 193:     register int dist;
 194: 
 195:     switch (com) {
 196:     case 'r':
 197:         if (++sp->file->dir == 9)
 198:             sp->file->dir = 1;
 199:         break;
 200:     case 'l':
 201:         if (--sp->file->dir == 0)
 202:             sp->file->dir = 8;
 203:         break;
 204:         case '0': case '1': case '2': case '3':
 205:         case '4': case '5': case '6': case '7':
 206:         if (sp->file->dir % 2 == 0)
 207:             dist = dtab[com - '0'];
 208:         else
 209:             dist = com - '0';
 210:         sp->file->row -= dr[sp->file->dir] * dist;
 211:         sp->file->col -= dc[sp->file->dir] * dist;
 212:         *moved = 1;
 213:         break;
 214:     case 'b':
 215:         break;
 216:     case 'd':
 217:         if (!*moved) {
 218:             if (windspeed != 0 && ++sp->file->drift > 2 &&
 219:                 (sp->specs->class >= 3 && !snagged(sp)
 220:                  || (turn & 1) == 0)) {
 221:                 sp->file->row -= dr[winddir];
 222:                 sp->file->col -= dc[winddir];
 223:             }
 224:         } else
 225:             sp->file->drift = 0;
 226:         break;
 227:     }
 228: }
 229: 
 230: sendbp(from, to, sections, isdefense)
 231: register struct ship *from, *to;
 232: int sections;
 233: char isdefense;
 234: {
 235:     int n;
 236:     register struct BP *bp;
 237: 
 238:     bp = isdefense ? from->file->DBP : from->file->OBP;
 239:     for (n = 0; n < NBP && bp[n].turnsent; n++)
 240:         ;
 241:     if (n < NBP && sections) {
 242:         Write(isdefense ? W_DBP : W_OBP, from, 0,
 243:             n, turn, to->file->index, sections);
 244:         if (isdefense)
 245:             makesignal(from, "repelling boarders",
 246:                 (struct ship *)0);
 247:         else
 248:             makesignal(from, "boarding the %s (%c%c)", to);
 249:     }
 250: }
 251: 
 252: toughmelee(ship, to, isdefense, count)
 253: register struct ship *ship, *to;
 254: int isdefense, count;
 255: {
 256:     register struct BP *bp;
 257:     register obp = 0;
 258:     int n, OBP = 0, DBP = 0, dbp = 0;
 259:     int qual;
 260: 
 261:     qual = ship->specs->qual;
 262:     bp = isdefense ? ship->file->DBP : ship->file->OBP;
 263:     for (n = 0; n < NBP; n++, bp++) {
 264:         if (bp->turnsent && (to == bp->toship || isdefense)) {
 265:             obp += bp->mensent / 100
 266:                 ? ship->specs->crew1 * qual : 0;
 267:             obp += (bp->mensent % 100)/10
 268:                 ? ship->specs->crew2 * qual : 0;
 269:             obp += bp->mensent % 10
 270:                 ? ship->specs->crew3 * qual : 0;
 271:         }
 272:     }
 273:     if (count || isdefense)
 274:         return obp;
 275:     OBP = toughmelee(to, ship, 0, count + 1);
 276:     dbp = toughmelee(ship, to, 1, count + 1);
 277:     DBP = toughmelee(to, ship, 1, count + 1);
 278:     if (OBP > obp + 10 || OBP + DBP >= obp + dbp + 10)
 279:         return 1;
 280:     else
 281:         return 0;
 282: }
 283: 
 284: reload()
 285: {
 286:     register struct ship *sp;
 287: 
 288:     foreachship(sp) {
 289:         sp->file->loadwith = 0;
 290:     }
 291: }
 292: 
 293: checksails()
 294: {
 295:     register struct ship *sp;
 296:     register int rig, full;
 297:     struct ship *close;
 298: 
 299:     foreachship(sp) {
 300:         if (sp->file->captain[0] != 0)
 301:             continue;
 302:         rig = sp->specs->rig1;
 303:         if (windspeed == 6 || windspeed == 5 && sp->specs->class > 4)
 304:             rig = 0;
 305:         if (rig && sp->specs->crew3) {
 306:             close = closestenemy(sp, 0, 0);
 307:             if (close != 0) {
 308:                 if (range(sp, close) > 9)
 309:                     full = 1;
 310:                 else
 311:                     full = 0;
 312:             } else
 313:                 full = 0;
 314:         } else
 315:             full = 0;
 316:         if ((sp->file->FS != 0) != full)
 317:             Write(W_FS, sp, 0, full, 0, 0, 0);
 318:     }
 319: }

Defined functions

Defined variables