1 /* $NetBSD: hack.dog.c,v 1.10 2009/06/07 18:30:39 dholland Exp $ */ 2 3 /* 4 * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica, 5 * Amsterdam 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are 10 * met: 11 * 12 * - Redistributions of source code must retain the above copyright notice, 13 * this list of conditions and the following disclaimer. 14 * 15 * - Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * - Neither the name of the Stichting Centrum voor Wiskunde en 20 * Informatica, nor the names of its contributors may be used to endorse or 21 * promote products derived from this software without specific prior 22 * written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 25 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 27 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 28 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 31 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 33 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 34 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 /* 38 * Copyright (c) 1982 Jay Fenlason <hack@gnu.org> 39 * All rights reserved. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. The name of the author may not be used to endorse or promote products 50 * derived from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 53 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 54 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 55 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 56 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 57 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 58 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 59 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 60 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 61 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 */ 63 64 #include <sys/cdefs.h> 65 #ifndef lint 66 __RCSID("$NetBSD: hack.dog.c,v 1.10 2009/06/07 18:30:39 dholland Exp $"); 67 #endif /* not lint */ 68 69 #include "hack.h" 70 #include "extern.h" 71 #include "hack.mfndpos.h" 72 #include "def.edog.h" 73 #include "def.mkroom.h" 74 75 const struct permonst li_dog = 76 {"little dog", 'd', 2, 18, 6, 1, 6, sizeof(struct edog)}; 77 const struct permonst dog = 78 {"dog", 'd', 4, 16, 5, 1, 6, sizeof(struct edog)}; 79 const struct permonst la_dog = 80 {"large dog", 'd', 6, 15, 4, 2, 4, sizeof(struct edog)}; 81 82 83 void 84 makedog(void) 85 { 86 struct monst *mtmp = makemon(&li_dog, u.ux, u.uy); 87 if (!mtmp) 88 return; /* dogs were genocided */ 89 initedog(mtmp); 90 } 91 92 void 93 initedog(struct monst *mtmp) 94 { 95 mtmp->mtame = mtmp->mpeaceful = 1; 96 EDOG(mtmp)->hungrytime = 1000 + moves; 97 EDOG(mtmp)->eattime = 0; 98 EDOG(mtmp)->droptime = 0; 99 EDOG(mtmp)->dropdist = 10000; 100 EDOG(mtmp)->apport = 10; 101 EDOG(mtmp)->whistletime = 0; 102 } 103 104 /* attach the monsters that went down (or up) together with @ */ 105 struct monst *mydogs = 0; 106 struct monst *fallen_down = 0;/* monsters that fell through a trapdoor */ 107 /* they will appear on the next level @ goes to, even if he goes up! */ 108 109 void 110 losedogs(void) 111 { 112 struct monst *mtmp; 113 while ((mtmp = mydogs) != NULL) { 114 mydogs = mtmp->nmon; 115 mtmp->nmon = fmon; 116 fmon = mtmp; 117 mnexto(mtmp); 118 } 119 while ((mtmp = fallen_down) != NULL) { 120 fallen_down = mtmp->nmon; 121 mtmp->nmon = fmon; 122 fmon = mtmp; 123 rloc(mtmp); 124 } 125 } 126 127 void 128 keepdogs(void) 129 { 130 struct monst *mtmp; 131 for (mtmp = fmon; mtmp; mtmp = mtmp->nmon) 132 if (dist(mtmp->mx, mtmp->my) < 3 && follower(mtmp) 133 && !mtmp->msleep && !mtmp->mfroz) { 134 relmon(mtmp); 135 mtmp->nmon = mydogs; 136 mydogs = mtmp; 137 unpmon(mtmp); 138 keepdogs(); /* we destroyed the link, so use 139 * recursion */ 140 return; /* (admittedly somewhat primitive) */ 141 } 142 } 143 144 void 145 fall_down(struct monst *mtmp) 146 { 147 relmon(mtmp); 148 mtmp->nmon = fallen_down; 149 fallen_down = mtmp; 150 unpmon(mtmp); 151 mtmp->mtame = 0; 152 } 153 154 /* return quality of food; the lower the better */ 155 #define DOGFOOD 0 156 #define CADAVER 1 157 #define ACCFOOD 2 158 #define MANFOOD 3 159 #define APPORT 4 160 #define POISON 5 161 #define UNDEF 6 162 int 163 dogfood(struct obj *obj) 164 { 165 switch (obj->olet) { 166 case FOOD_SYM: 167 return ( 168 (obj->otyp == TRIPE_RATION) ? DOGFOOD : 169 (obj->otyp < CARROT) ? ACCFOOD : 170 (obj->otyp < CORPSE) ? MANFOOD : 171 (poisonous(obj) || obj->age + 50 <= moves || 172 obj->otyp == DEAD_COCKATRICE) 173 ? POISON : CADAVER 174 ); 175 default: 176 if (!obj->cursed) 177 return (APPORT); 178 /* fall into next case */ 179 case BALL_SYM: 180 case CHAIN_SYM: 181 case ROCK_SYM: 182 return (UNDEF); 183 } 184 } 185 186 /* return 0 (no move), 1 (move) or 2 (dead) */ 187 int 188 dog_move(struct monst *mtmp, int after) 189 { 190 int nx, ny, omx, omy, appr, nearer, j; 191 int udist, chi = 0, i, whappr; 192 struct monst *mtmp2; 193 const struct permonst *mdat = mtmp->data; 194 struct edog *edog = EDOG(mtmp); 195 struct obj *obj; 196 struct trap *trap; 197 xchar cnt, chcnt, nix, niy; 198 schar dogroom, uroom; 199 xchar gx = 0, gy = 0, gtyp, otyp; /* current goal */ 200 coord poss[9]; 201 int info[9]; 202 #define GDIST(x,y) ((x-gx)*(x-gx) + (y-gy)*(y-gy)) 203 #define DDIST(x,y) ((x-omx)*(x-omx) + (y-omy)*(y-omy)) 204 205 if (moves <= edog->eattime) 206 return (0); /* dog is still eating */ 207 omx = mtmp->mx; 208 omy = mtmp->my; 209 whappr = (moves - EDOG(mtmp)->whistletime < 5); 210 if (moves > edog->hungrytime + 500 && !mtmp->mconf) { 211 mtmp->mconf = 1; 212 mtmp->mhpmax /= 3; 213 if (mtmp->mhp > mtmp->mhpmax) 214 mtmp->mhp = mtmp->mhpmax; 215 if (cansee(omx, omy)) 216 pline("%s is confused from hunger.", Monnam(mtmp)); 217 else 218 pline("You feel worried about %s.", monnam(mtmp)); 219 } else if (moves > edog->hungrytime + 750 || mtmp->mhp < 1) { 220 if (cansee(omx, omy)) 221 pline("%s dies from hunger.", Monnam(mtmp)); 222 else 223 pline("You have a sad feeling for a moment, then it passes."); 224 mondied(mtmp); 225 return (2); 226 } 227 dogroom = inroom(omx, omy); 228 uroom = inroom(u.ux, u.uy); 229 udist = dist(omx, omy); 230 231 /* maybe we tamed him while being swallowed --jgm */ 232 if (!udist) 233 return (0); 234 235 /* if we are carrying sth then we drop it (perhaps near @) */ 236 /* Note: if apport == 1 then our behaviour is independent of udist */ 237 if (mtmp->minvent) { 238 if (!rn2(udist) || !rn2((int) edog->apport)) 239 if ((unsigned) rn2(10) < edog->apport) { 240 relobj(mtmp, (int) mtmp->minvis); 241 if (edog->apport > 1) 242 edog->apport--; 243 edog->dropdist = udist; /* hpscdi!jon */ 244 edog->droptime = moves; 245 } 246 } else { 247 if ((obj = o_at(omx, omy)) != NULL) 248 if (!strchr("0_", obj->olet)) { 249 if ((otyp = dogfood(obj)) <= CADAVER) { 250 nix = omx; 251 niy = omy; 252 goto eatobj; 253 } 254 if (obj->owt < 10 * mtmp->data->mlevel) 255 if ((unsigned) rn2(20) < edog->apport + 3) 256 if (rn2(udist) || !rn2((int) edog->apport)) { 257 freeobj(obj); 258 unpobj(obj); 259 /* 260 * if(levl[omx][omy].s 261 * crsym == 262 * obj->olet) 263 * newsym(omx,omy); 264 */ 265 mpickobj(mtmp, obj); 266 } 267 } 268 } 269 270 /* first we look for food */ 271 gtyp = UNDEF; /* no goal as yet */ 272 #ifdef LINT 273 gx = gy = 0; /* suppress 'used before set' message */ 274 #endif /* LINT */ 275 for (obj = fobj; obj; obj = obj->nobj) { 276 otyp = dogfood(obj); 277 if (otyp > gtyp || otyp == UNDEF) 278 continue; 279 if (inroom(obj->ox, obj->oy) != dogroom) 280 continue; 281 if (otyp < MANFOOD && 282 (dogroom >= 0 || DDIST(obj->ox, obj->oy) < 10)) { 283 if (otyp < gtyp || (otyp == gtyp && 284 DDIST(obj->ox, obj->oy) < DDIST(gx, gy))) { 285 gx = obj->ox; 286 gy = obj->oy; 287 gtyp = otyp; 288 } 289 } else if (gtyp == UNDEF && dogroom >= 0 && 290 uroom == dogroom && 291 !mtmp->minvent && edog->apport > (unsigned)rn2(8)) { 292 gx = obj->ox; 293 gy = obj->oy; 294 gtyp = APPORT; 295 } 296 } 297 if (gtyp == UNDEF || 298 (gtyp != DOGFOOD && gtyp != APPORT && moves < edog->hungrytime)) { 299 if (dogroom < 0 || dogroom == uroom) { 300 gx = u.ux; 301 gy = u.uy; 302 #ifndef QUEST 303 } else { 304 int tmp = rooms[dogroom].fdoor; 305 cnt = rooms[dogroom].doorct; 306 307 gx = gy = FAR; /* random, far away */ 308 while (cnt--) { 309 if (dist(gx, gy) > 310 dist(doors[tmp].x, doors[tmp].y)) { 311 gx = doors[tmp].x; 312 gy = doors[tmp].y; 313 } 314 tmp++; 315 } 316 /* here gx == FAR e.g. when dog is in a vault */ 317 if (gx == FAR || (gx == omx && gy == omy)) { 318 gx = u.ux; 319 gy = u.uy; 320 } 321 #endif /* QUEST */ 322 } 323 appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0; 324 if (after && udist <= 4 && gx == u.ux && gy == u.uy) 325 return (0); 326 if (udist > 1) { 327 if (!IS_ROOM(levl[u.ux][u.uy].typ) || !rn2(4) || 328 whappr || 329 (mtmp->minvent && rn2((int) edog->apport))) 330 appr = 1; 331 } 332 /* if you have dog food he'll follow you more closely */ 333 if (appr == 0) { 334 obj = invent; 335 while (obj) { 336 if (obj->otyp == TRIPE_RATION) { 337 appr = 1; 338 break; 339 } 340 obj = obj->nobj; 341 } 342 } 343 } else 344 appr = 1; /* gtyp != UNDEF */ 345 if (mtmp->mconf) 346 appr = 0; 347 348 if (gx == u.ux && gy == u.uy && (dogroom != uroom || dogroom < 0)) { 349 coord *cp; 350 cp = gettrack(omx, omy); 351 if (cp) { 352 gx = cp->x; 353 gy = cp->y; 354 } 355 } 356 nix = omx; 357 niy = omy; 358 cnt = mfndpos(mtmp, poss, info, ALLOW_M | ALLOW_TRAPS); 359 chcnt = 0; 360 chi = -1; 361 for (i = 0; i < cnt; i++) { 362 nx = poss[i].x; 363 ny = poss[i].y; 364 if (info[i] & ALLOW_M) { 365 mtmp2 = m_at(nx, ny); 366 if (mtmp2 == NULL) 367 panic("error in dog_move"); 368 if (mtmp2->data->mlevel >= mdat->mlevel + 2 || 369 mtmp2->data->mlet == 'c') 370 continue; 371 if (after) 372 return (0); /* hit only once each move */ 373 374 if (hitmm(mtmp, mtmp2) == 1 && rn2(4) && 375 mtmp2->mlstmv != moves && 376 hitmm(mtmp2, mtmp) == 2) 377 return (2); 378 return (0); 379 } 380 /* dog avoids traps */ 381 /* but perhaps we have to pass a trap in order to follow @ */ 382 if ((info[i] & ALLOW_TRAPS) && (trap = t_at(nx, ny))) { 383 if (!trap->tseen && rn2(40)) 384 continue; 385 if (rn2(10)) 386 continue; 387 } 388 /* dog eschewes cursed objects */ 389 /* but likes dog food */ 390 obj = fobj; 391 while (obj) { 392 if (obj->ox != nx || obj->oy != ny) 393 goto nextobj; 394 if (obj->cursed) 395 goto nxti; 396 if (obj->olet == FOOD_SYM && 397 (otyp = dogfood(obj)) < MANFOOD && 398 (otyp < ACCFOOD || edog->hungrytime <= moves)) { 399 /* 400 * Note: our dog likes the food so much that 401 * he might eat it even when it conceals a 402 * cursed object 403 */ 404 nix = nx; 405 niy = ny; 406 chi = i; 407 eatobj: 408 edog->eattime = 409 moves + obj->quan * objects[obj->otyp].oc_delay; 410 if (edog->hungrytime < moves) 411 edog->hungrytime = moves; 412 edog->hungrytime += 413 5 * obj->quan * objects[obj->otyp].nutrition; 414 mtmp->mconf = 0; 415 if (cansee(nix, niy)) 416 pline("%s ate %s.", Monnam(mtmp), doname(obj)); 417 /* perhaps this was a reward */ 418 if (otyp != CADAVER) 419 edog->apport += 200 / (edog->dropdist + moves - edog->droptime); 420 delobj(obj); 421 goto newdogpos; 422 } 423 nextobj: 424 obj = obj->nobj; 425 } 426 427 for (j = 0; j < MTSZ && j < cnt - 1; j++) 428 if (nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y) 429 if (rn2(4 * (cnt - j))) 430 goto nxti; 431 432 /* 433 * Some stupid C compilers cannot compute the whole 434 * expression at once. 435 */ 436 nearer = GDIST(nx, ny); 437 nearer -= GDIST(nix, niy); 438 nearer *= appr; 439 if ((nearer == 0 && !rn2(++chcnt)) || nearer < 0 || 440 (nearer > 0 && !whappr && 441 ((omx == nix && omy == niy && !rn2(3)) 442 || !rn2(12)) 443 )) { 444 nix = nx; 445 niy = ny; 446 if (nearer < 0) 447 chcnt = 0; 448 chi = i; 449 } 450 nxti: ; 451 } 452 newdogpos: 453 if (nix != omx || niy != omy) { 454 if (info[chi] & ALLOW_U) { 455 (void) hitu(mtmp, d(mdat->damn, mdat->damd) + 1); 456 return (0); 457 } 458 mtmp->mx = nix; 459 mtmp->my = niy; 460 for (j = MTSZ - 1; j > 0; j--) 461 mtmp->mtrack[j] = mtmp->mtrack[j - 1]; 462 mtmp->mtrack[0].x = omx; 463 mtmp->mtrack[0].y = omy; 464 } 465 if (mintrap(mtmp) == 2) /* he died */ 466 return (2); 467 pmon(mtmp); 468 return (1); 469 } 470 471 /* return roomnumber or -1 */ 472 int 473 inroom(xchar x, xchar y) 474 { 475 #ifndef QUEST 476 struct mkroom *croom = &rooms[0]; 477 while (croom->hx >= 0) { 478 if (croom->hx >= x - 1 && croom->lx <= x + 1 && 479 croom->hy >= y - 1 && croom->ly <= y + 1) 480 return (croom - rooms); 481 croom++; 482 } 483 #endif /* QUEST */ 484 return (-1); /* not in room or on door */ 485 } 486 487 int 488 tamedog(struct monst *mtmp, struct obj *obj) 489 { 490 struct monst *mtmp2; 491 492 if (flags.moonphase == FULL_MOON && night() && rn2(6)) 493 return (0); 494 495 /* If we cannot tame him, at least he's no longer afraid. */ 496 mtmp->mflee = 0; 497 mtmp->mfleetim = 0; 498 if (mtmp->mtame || mtmp->mfroz || 499 #ifndef NOWORM 500 mtmp->wormno || 501 #endif /* NOWORM */ 502 mtmp->isshk || mtmp->isgd || strchr(" &@12", mtmp->data->mlet)) 503 return (0); /* no tame long worms? */ 504 if (obj) { 505 if (dogfood(obj) >= MANFOOD) 506 return (0); 507 if (cansee(mtmp->mx, mtmp->my)) { 508 pline("%s devours the %s.", Monnam(mtmp), 509 objects[obj->otyp].oc_name); 510 } 511 obfree(obj, (struct obj *) 0); 512 } 513 mtmp2 = newmonst(sizeof(struct edog) + mtmp->mnamelth); 514 *mtmp2 = *mtmp; 515 mtmp2->mxlth = sizeof(struct edog); 516 if (mtmp->mnamelth) 517 (void) strcpy(NAME(mtmp2), NAME(mtmp)); 518 initedog(mtmp2); 519 replmon(mtmp, mtmp2); 520 return (1); 521 } 522