Source:NetHack 3.4.0/dogmove.c
Jump to navigation
Jump to search
Below is the full text to dogmove.c from the source code of NetHack 3.4.0. To link to a particular line, write [[NetHack 3.4.0/dogmove.c#line123]], for example.
Warning! This is the source code from an old release. For the latest release, see Source code
The NetHack General Public License applies to screenshots, source code and other content from NetHack.
This content was modified from the original NetHack source code distribution (by splitting up NetHack content between wiki pages, and possibly further editing). See the page history for a list of who changed it, and on what dates.
1. /* SCCS Id: @(#)dogmove.c 3.4 2002/03/09 */ 2. /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */ 3. /* NetHack may be freely redistributed. See license for details. */ 4. 5. #include "hack.h" 6. 7. #include "mfndpos.h" 8. #include "edog.h" 9. 10. extern boolean notonhead; 11. 12. #ifdef OVL0 13. 14. STATIC_DCL boolean FDECL(dog_hunger,(struct monst *,struct edog *)); 15. STATIC_DCL int FDECL(dog_invent,(struct monst *,struct edog *,int)); 16. STATIC_DCL int FDECL(dog_goal,(struct monst *,struct edog *,int,int,int)); 17. 18. STATIC_DCL struct obj *FDECL(DROPPABLES, (struct monst *)); 19. STATIC_DCL boolean FDECL(can_reach_food,(struct monst *,XCHAR_P,XCHAR_P,XCHAR_P, 20. XCHAR_P)); 21. 22. STATIC_OVL struct obj * 23. DROPPABLES(mon) 24. register struct monst *mon; 25. { 26. register struct obj *obj; 27. struct obj *wep = MON_WEP(mon); 28. boolean item1 = FALSE, item2 = FALSE; 29. 30. if (is_animal(mon->data) || mindless(mon->data)) 31. item1 = item2 = TRUE; 32. if (!tunnels(mon->data) || !needspick(mon->data)) 33. item1 = TRUE; 34. for(obj = mon->minvent; obj; obj = obj->nobj) { 35. if (!item1 && is_pick(obj) && (obj->otyp != DWARVISH_MATTOCK 36. || !which_armor(mon, W_ARMS))) { 37. item1 = TRUE; 38. continue; 39. } 40. if (!item2 && obj->otyp == UNICORN_HORN && !obj->cursed) { 41. item2 = TRUE; 42. continue; 43. } 44. if (!obj->owornmask && obj != wep) return obj; 45. } 46. return (struct obj *)0; 47. } 48. 49. static NEARDATA const char nofetch[] = { BALL_CLASS, CHAIN_CLASS, ROCK_CLASS, 0 }; 50. 51. #endif /* OVL0 */ 52. 53. STATIC_OVL boolean FDECL(cursed_object_at, (int, int)); 54. 55. STATIC_VAR xchar gtyp, gx, gy; /* type and position of dog's current goal */ 56. 57. STATIC_PTR void FDECL(wantdoor, (int, int, genericptr_t)); 58. 59. #ifdef OVLB 60. STATIC_OVL boolean 61. cursed_object_at(x, y) 62. int x, y; 63. { 64. struct obj *otmp; 65. 66. for(otmp = level.objects[x][y]; otmp; otmp = otmp->nexthere) 67. if (otmp->cursed) return TRUE; 68. return FALSE; 69. } 70. 71. int 72. dog_nutrition(mtmp, obj) 73. struct monst *mtmp; 74. struct obj *obj; 75. { 76. int nutrit; 77. 78. /* 79. * It is arbitrary that the pet takes the same length of time to eat 80. * as a human, but gets more nutritional value. 81. */ 82. if (obj->oclass == FOOD_CLASS) { 83. if(obj->otyp == CORPSE) { 84. mtmp->meating = 3 + (mons[obj->corpsenm].cwt >> 6); 85. nutrit = mons[obj->corpsenm].cnutrit; 86. } else { 87. mtmp->meating = objects[obj->otyp].oc_delay; 88. nutrit = objects[obj->otyp].oc_nutrition; 89. } 90. switch(mtmp->data->msize) { 91. case MZ_TINY: nutrit *= 8; break; 92. case MZ_SMALL: nutrit *= 6; break; 93. default: 94. case MZ_MEDIUM: nutrit *= 5; break; 95. case MZ_LARGE: nutrit *= 4; break; 96. case MZ_HUGE: nutrit *= 3; break; 97. case MZ_GIGANTIC: nutrit *= 2; break; 98. } 99. if(obj->oeaten) { 100. mtmp->meating = eaten_stat(mtmp->meating, obj); 101. nutrit = eaten_stat(nutrit, obj); 102. } 103. } else if (obj->oclass == GOLD_CLASS) { 104. mtmp->meating = (int)(obj->quan/2000) + 1; 105. if (mtmp->meating < 0) mtmp->meating = 1; 106. nutrit = (int)(obj->quan/20); 107. if (nutrit < 0) nutrit = 0; 108. } else { 109. /* Unusual pet such as gelatinous cube eating odd stuff. 110. * meating made consistent with wild monsters in mon.c. 111. * nutrit made consistent with polymorphed player nutrit in 112. * eat.c. (This also applies to pets eating gold.) 113. */ 114. mtmp->meating = obj->owt/20 + 1; 115. nutrit = 5*objects[obj->otyp].oc_nutrition; 116. } 117. return nutrit; 118. } 119. 120. /* returns 2 if pet dies, otherwise 1 */ 121. int 122. dog_eat(mtmp, obj, x, y, devour) 123. register struct monst *mtmp; 124. register struct obj * obj; 125. int x, y; 126. boolean devour; 127. { 128. register struct edog *edog = EDOG(mtmp); 129. boolean poly = FALSE, grow = FALSE, heal = FALSE; 130. int nutrit; 131. 132. if(edog->hungrytime < monstermoves) 133. edog->hungrytime = monstermoves; 134. nutrit = dog_nutrition(mtmp, obj); 135. poly = polyfodder(obj); 136. grow = mlevelgain(obj); 137. heal = mhealup(obj); 138. if (devour) { 139. if (mtmp->meating > 1) mtmp->meating /= 2; 140. if (nutrit > 1) nutrit = (nutrit * 3) / 4; 141. } 142. edog->hungrytime += nutrit; 143. mtmp->mconf = 0; 144. if (edog->mhpmax_penalty) { 145. /* no longer starving */ 146. mtmp->mhpmax += edog->mhpmax_penalty; 147. edog->mhpmax_penalty = 0; 148. } 149. if (mtmp->mflee && mtmp->mfleetim > 1) mtmp->mfleetim /= 2; 150. if (mtmp->mtame < 20) mtmp->mtame++; 151. if (x != mtmp->mx || y != mtmp->my) { /* moved & ate on same turn */ 152. newsym(x, y); 153. newsym(mtmp->mx, mtmp->my); 154. } 155. if (is_pool(x, y) && !Underwater) { 156. /* Don't print obj */ 157. /* TODO: Reveal presence of sea monster (especially sharks) */ 158. } else 159. /* hack: observe the action if either new or old location is in view */ 160. if (cansee(x, y) || cansee(mtmp->mx, mtmp->my)) 161. pline("%s %s %s.", noit_Monnam(mtmp), 162. devour ? "devours" : "eats", 163. (obj->oclass == FOOD_CLASS) ? 164. singular(obj, doname) : doname(obj)); 165. /* It's a reward if it's DOGFOOD and the player dropped/threw it. */ 166. /* We know the player had it if invlet is set -dlc */ 167. if(dogfood(mtmp,obj) == DOGFOOD && obj->invlet) 168. #ifdef LINT 169. edog->apport = 0; 170. #else 171. edog->apport += (int)(200L/ 172. ((long)edog->dropdist + monstermoves - edog->droptime)); 173. #endif 174. if (mtmp->data == &mons[PM_RUST_MONSTER] && obj->oerodeproof) { 175. /* The object's rustproofing is gone now */ 176. obj->oerodeproof = 0; 177. mtmp->mstun = 1; 178. if (canseemon(mtmp) && flags.verbose) { 179. pline("%s spits %s out in disgust!", 180. Monnam(mtmp), distant_name(obj,doname)); 181. } 182. } else if (obj == uball) { 183. unpunish(); 184. delobj(obj); 185. } else if (obj == uchain) 186. unpunish(); 187. else if (obj->quan > 1L && obj->oclass == FOOD_CLASS) { 188. obj->quan--; 189. obj->owt = weight(obj); 190. } else 191. delobj(obj); 192. 193. if (poly) { 194. char oldpet[BUFSZ]; 195. #ifdef STEED 196. long mw = mtmp->misc_worn_check; 197. 198. mtmp->misc_worn_check &= ~W_SADDLE; 199. #endif 200. Strcpy(oldpet, Monnam(mtmp)); 201. #ifdef STEED 202. mtmp->misc_worn_check = mw; 203. #endif 204. if (newcham(mtmp, (struct permonst *)0, FALSE) && 205. cansee(mtmp->mx, mtmp->my)) { 206. uchar save_mnamelth = mtmp->mnamelth; 207. mtmp->mnamelth = 0; 208. pline("%s turns into %s!", oldpet, a_monnam(mtmp)); 209. mtmp->mnamelth = save_mnamelth; 210. } 211. } 212. /* limit "instant" growth to prevent potential abuse */ 213. if (grow && (int) mtmp->m_lev < (int)mtmp->data->mlevel + 15) { 214. if (!grow_up(mtmp, (struct monst *)0)) return 2; 215. } 216. if (heal) mtmp->mhp = mtmp->mhpmax; 217. return 1; 218. } 219. 220. #endif /* OVLB */ 221. #ifdef OVL0 222. 223. /* hunger effects -- returns TRUE on starvation */ 224. STATIC_OVL boolean 225. dog_hunger(mtmp, edog) 226. register struct monst *mtmp; 227. register struct edog *edog; 228. { 229. if (monstermoves > edog->hungrytime + 500) { 230. if (!carnivorous(mtmp->data) && !herbivorous(mtmp->data)) { 231. edog->hungrytime = monstermoves + 500; 232. /* but not too high; it might polymorph */ 233. } else if (!edog->mhpmax_penalty) { 234. /* starving pets are limited in healing */ 235. int newmhpmax = mtmp->mhpmax / 3; 236. mtmp->mconf = 1; 237. edog->mhpmax_penalty = mtmp->mhpmax - newmhpmax; 238. mtmp->mhpmax = newmhpmax; 239. if (mtmp->mhp > mtmp->mhpmax) 240. mtmp->mhp = mtmp->mhpmax; 241. if (mtmp->mhp < 1) goto dog_died; 242. if (cansee(mtmp->mx, mtmp->my)) 243. pline("%s is confused from hunger.", Monnam(mtmp)); 244. else if (couldsee(mtmp->mx, mtmp->my)) 245. beg(mtmp); 246. else 247. You_feel("worried about %s.", y_monnam(mtmp)); 248. stop_occupation(); 249. } else if (monstermoves > edog->hungrytime + 750 || mtmp->mhp < 1) { 250. dog_died: 251. if (mtmp->mleashed) 252. Your("leash goes slack."); 253. else if (cansee(mtmp->mx, mtmp->my)) 254. pline("%s dies%s.", Monnam(mtmp), 255. (mtmp->mhp >= 1) ? "" : " from hunger"); 256. else 257. You_feel("%s for a moment.", 258. Hallucination ? "bummed" : "sad"); 259. mondied(mtmp); 260. return(TRUE); 261. } 262. } 263. return(FALSE); 264. } 265. 266. /* do something with object (drop, pick up, eat) at current position 267. * returns 1 if object eaten (since that counts as dog's move), 2 if died 268. */ 269. STATIC_OVL int 270. dog_invent(mtmp, edog, udist) 271. register struct monst *mtmp; 272. register struct edog *edog; 273. int udist; 274. { 275. register int omx, omy; 276. struct obj *obj; 277. 278. if (mtmp->msleeping || !mtmp->mcanmove) return(0); 279. 280. omx = mtmp->mx; 281. omy = mtmp->my; 282. 283. /* if we are carrying sth then we drop it (perhaps near @) */ 284. /* Note: if apport == 1 then our behaviour is independent of udist */ 285. /* Use udist+1 so steed won't cause divide by zero */ 286. #ifndef GOLDOBJ 287. if(DROPPABLES(mtmp) || mtmp->mgold) { 288. #else 289. if(DROPPABLES(mtmp)) { 290. #endif 291. if (!rn2(udist+1) || !rn2(edog->apport)) 292. if(rn2(10) < edog->apport){ 293. relobj(mtmp, (int)mtmp->minvis, TRUE); 294. if(edog->apport > 1) edog->apport--; 295. edog->dropdist = udist; /* hpscdi!jon */ 296. edog->droptime = monstermoves; 297. } 298. } else { 299. if((obj=level.objects[omx][omy]) && !index(nofetch,obj->oclass) 300. #ifdef MAIL 301. && obj->otyp != SCR_MAIL 302. #endif 303. ){ 304. if (dogfood(mtmp, obj) <= CADAVER) 305. return dog_eat(mtmp, obj, omx, omy, FALSE); 306. 307. if(can_carry(mtmp, obj) && !obj->cursed && 308. !is_pool(mtmp->mx,mtmp->my)) { 309. if(rn2(20) < edog->apport+3) { 310. if (rn2(udist) || !rn2(edog->apport)) { 311. if (cansee(omx, omy) && flags.verbose) 312. pline("%s picks up %s.", Monnam(mtmp), 313. distant_name(obj, doname)); 314. obj_extract_self(obj); 315. newsym(omx,omy); 316. (void) mpickobj(mtmp,obj); 317. if (attacktype(mtmp->data, AT_WEAP) && 318. mtmp->weapon_check == NEED_WEAPON) { 319. mtmp->weapon_check = NEED_HTH_WEAPON; 320. (void) mon_wield_item(mtmp); 321. } 322. m_dowear(mtmp, FALSE); 323. } 324. } 325. } 326. } 327. } 328. return 0; 329. } 330. 331. /* set dog's goal -- gtyp, gx, gy 332. * returns -1/0/1 (dog's desire to approach player) or -2 (abort move) 333. */ 334. STATIC_OVL int 335. dog_goal(mtmp, edog, after, udist, whappr) 336. register struct monst *mtmp; 337. struct edog *edog; 338. int after, udist, whappr; 339. { 340. register int omx, omy; 341. boolean in_masters_sight; 342. register struct obj *obj; 343. xchar otyp; 344. int appr; 345. 346. 347. #ifdef STEED 348. /* Steeds don't move on their own will */ 349. if (mtmp == u.usteed) 350. return (-2); 351. #endif 352. 353. omx = mtmp->mx; 354. omy = mtmp->my; 355. 356. in_masters_sight = couldsee(omx, omy); 357. 358. if (!edog || mtmp->mleashed) { /* he's not going anywhere... */ 359. gtyp = APPORT; 360. gx = u.ux; 361. gy = u.uy; 362. } else { 363. #define DDIST(x,y) (dist2(x,y,omx,omy)) 364. #define SQSRCHRADIUS 5 365. int min_x, max_x, min_y, max_y; 366. register int nx, ny; 367. 368. gtyp = UNDEF; /* no goal as yet */ 369. gx = gy = 0; /* suppress 'used before set' message */ 370. 371. if ((min_x = omx - SQSRCHRADIUS) < 0) min_x = 0; 372. if ((max_x = omx + SQSRCHRADIUS) >= COLNO) max_x = COLNO - 1; 373. if ((min_y = omy - SQSRCHRADIUS) < 0) min_y = 0; 374. if ((max_y = omy + SQSRCHRADIUS) >= ROWNO) max_y = ROWNO - 1; 375. 376. /* nearby food is the first choice, then other objects */ 377. for (obj = fobj; obj; obj = obj->nobj) { 378. nx = obj->ox; 379. ny = obj->oy; 380. if (nx >= min_x && nx <= max_x && ny >= min_y && ny <= max_y) { 381. otyp = dogfood(mtmp, obj); 382. if (otyp > gtyp || otyp == UNDEF) 383. continue; 384. if (cursed_object_at(nx, ny)) 385. continue; 386. if (otyp < MANFOOD && 387. can_reach_food(mtmp, mtmp->mx, mtmp->my, nx, ny)) { 388. if (otyp < gtyp || DDIST(nx,ny) < DDIST(gx,gy)) { 389. gx = nx; 390. gy = ny; 391. gtyp = otyp; 392. } 393. } else if(gtyp == UNDEF && in_masters_sight && 394. !mtmp->minvent && 395. (!levl[omx][omy].lit || levl[u.ux][u.uy].lit) && 396. (otyp == MANFOOD || m_cansee(mtmp, nx, ny)) && 397. edog->apport > rn2(8) && 398. can_carry(mtmp,obj)) { 399. gx = nx; 400. gy = ny; 401. gtyp = APPORT; 402. } 403. } 404. } 405. } 406. 407. /* follow player if appropriate */ 408. if (gtyp == UNDEF || 409. (gtyp != DOGFOOD && gtyp != APPORT && monstermoves < edog->hungrytime)) { 410. gx = u.ux; 411. gy = u.uy; 412. if (after && udist <= 4 && gx == u.ux && gy == u.uy) 413. return(-2); 414. appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0; 415. if (udist > 1) { 416. if (!IS_ROOM(levl[u.ux][u.uy].typ) || !rn2(4) || 417. whappr || 418. (mtmp->minvent && rn2(edog->apport))) 419. appr = 1; 420. } 421. /* if you have dog food it'll follow you more closely */ 422. if (appr == 0) { 423. obj = invent; 424. while (obj) { 425. if(dogfood(mtmp, obj) == DOGFOOD) { 426. appr = 1; 427. break; 428. } 429. obj = obj->nobj; 430. } 431. } 432. } else 433. appr = 1; /* gtyp != UNDEF */ 434. if(mtmp->mconf) 435. appr = 0; 436. 437. #define FARAWAY (COLNO + 2) /* position outside screen */ 438. if (gx == u.ux && gy == u.uy && !in_masters_sight) { 439. register coord *cp; 440. 441. cp = gettrack(omx,omy); 442. if (cp) { 443. gx = cp->x; 444. gy = cp->y; 445. if(edog) edog->ogoal.x = 0; 446. } else { 447. /* assume master hasn't moved far, and reuse previous goal */ 448. if(edog && edog->ogoal.x && 449. ((edog->ogoal.x != omx) || (edog->ogoal.y != omy))) { 450. gx = edog->ogoal.x; 451. gy = edog->ogoal.y; 452. edog->ogoal.x = 0; 453. } else { 454. int fardist = FARAWAY * FARAWAY; 455. gx = gy = FARAWAY; /* random */ 456. do_clear_area(omx, omy, 9, wantdoor, 457. (genericptr_t)&fardist); 458. 459. /* here gx == FARAWAY e.g. when dog is in a vault */ 460. if (gx == FARAWAY || (gx == omx && gy == omy)) { 461. gx = u.ux; 462. gy = u.uy; 463. } else if(edog) { 464. edog->ogoal.x = gx; 465. edog->ogoal.y = gy; 466. } 467. } 468. } 469. } else if(edog) { 470. edog->ogoal.x = 0; 471. } 472. return appr; 473. } 474. 475. /* return 0 (no move), 1 (move) or 2 (dead) */ 476. int 477. dog_move(mtmp, after) 478. register struct monst *mtmp; 479. register int after; /* this is extra fast monster movement */ 480. { 481. int omx, omy; /* original mtmp position */ 482. int appr, whappr, udist; 483. int i, j, k; 484. register struct edog *edog = EDOG(mtmp); 485. struct obj *obj = (struct obj *) 0; 486. xchar otyp; 487. boolean has_edog, cursemsg[9], do_eat = FALSE; 488. xchar nix, niy; /* position mtmp is (considering) moving to */ 489. register int nx, ny; /* temporary coordinates */ 490. xchar cnt, uncursedcnt, chcnt; 491. int chi = -1, nidist, ndist; 492. coord poss[9]; 493. long info[9], allowflags; 494. #define GDIST(x,y) (dist2(x,y,gx,gy)) 495. 496. /* 497. * Tame Angels have isminion set and an ispriest structure instead of 498. * an edog structure. Fortunately, guardian Angels need not worry 499. * about mundane things like eating and fetching objects, and can 500. * spend all their energy defending the player. (They are the only 501. * monsters with other structures that can be tame.) 502. */ 503. has_edog = !mtmp->isminion; 504. 505. omx = mtmp->mx; 506. omy = mtmp->my; 507. if (has_edog && dog_hunger(mtmp, edog)) return(2); /* starved */ 508. 509. udist = distu(omx,omy); 510. #ifdef STEED 511. /* Let steeds eat and maybe throw rider during Conflict */ 512. if (mtmp == u.usteed) { 513. if (Conflict && !resist(mtmp, RING_CLASS, 0, 0)) { 514. dismount_steed(DISMOUNT_THROWN); 515. return (1); 516. } 517. udist = 1; 518. } else 519. #endif 520. /* maybe we tamed him while being swallowed --jgm */ 521. if (!udist) return(0); 522. 523. nix = omx; /* set before newdogpos */ 524. niy = omy; 525. cursemsg[0] = FALSE; /* lint suppression */ 526. info[0] = 0; /* ditto */ 527. 528. if (has_edog) { 529. j = dog_invent(mtmp, edog, udist); 530. if (j == 2) return 2; /* died */ 531. else if (j == 1) goto newdogpos; /* eating something */ 532. 533. whappr = (monstermoves - edog->whistletime < 5); 534. } else 535. whappr = 0; 536. 537. appr = dog_goal(mtmp, has_edog ? edog : (struct edog *)0, 538. after, udist, whappr); 539. if (appr == -2) return(0); 540. 541. allowflags = ALLOW_M | ALLOW_TRAPS | ALLOW_SSM | ALLOW_SANCT; 542. if (passes_walls(mtmp->data)) allowflags |= (ALLOW_ROCK|ALLOW_WALL); 543. if (throws_rocks(mtmp->data)) allowflags |= ALLOW_ROCK; 544. if (Conflict && !resist(mtmp, RING_CLASS, 0, 0)) { 545. allowflags |= ALLOW_U; 546. if (!has_edog) { 547. coord mm; 548. /* Guardian angel refuses to be conflicted; rather, 549. * it disappears, angrily, and sends in some nasties 550. */ 551. if (canspotmon(mtmp)) { 552. pline("%s rebukes you, saying:", Monnam(mtmp)); 553. verbalize("Since you desire conflict, have some more!"); 554. } 555. mongone(mtmp); 556. i = rnd(4); 557. while(i--) { 558. mm.x = u.ux; 559. mm.y = u.uy; 560. if(enexto(&mm, mm.x, mm.y, &mons[PM_ANGEL])) 561. (void) mk_roamer(&mons[PM_ANGEL], u.ualign.type, 562. mm.x, mm.y, FALSE); 563. } 564. return(2); 565. 566. } 567. } 568. if (!Conflict && !mtmp->mconf && 569. mtmp == u.ustuck && !sticks(youmonst.data)) { 570. unstuck(mtmp); /* swallowed case handled above */ 571. You("get released!"); 572. } 573. if (!nohands(mtmp->data) && !verysmall(mtmp->data)) { 574. allowflags |= OPENDOOR; 575. if (m_carrying(mtmp, SKELETON_KEY)) allowflags |= BUSTDOOR; 576. } 577. if (is_giant(mtmp->data)) allowflags |= BUSTDOOR; 578. if (tunnels(mtmp->data) && (!needspick(mtmp->data) || 579. m_carrying(mtmp, PICK_AXE) || 580. m_carrying(mtmp, DWARVISH_MATTOCK))) 581. allowflags |= ALLOW_DIG; 582. cnt = mfndpos(mtmp, poss, info, allowflags); 583. 584. /* Normally dogs don't step on cursed items, but if they have no 585. * other choice they will. This requires checking ahead of time 586. * to see how many uncursed item squares are around. 587. */ 588. uncursedcnt = 0; 589. for (i = 0; i < cnt; i++) { 590. nx = poss[i].x; ny = poss[i].y; 591. if (MON_AT(nx,ny) && !(info[i] & ALLOW_M)) continue; 592. if (cursed_object_at(nx, ny)) continue; 593. uncursedcnt++; 594. } 595. 596. chcnt = 0; 597. chi = -1; 598. nidist = GDIST(nix,niy); 599. 600. for (i = 0; i < cnt; i++) { 601. nx = poss[i].x; 602. ny = poss[i].y; 603. cursemsg[i] = FALSE; 604. 605. /* if leashed, we drag him along. */ 606. if (mtmp->mleashed && distu(nx, ny) > 4) continue; 607. 608. /* if a guardian, try to stay close by choice */ 609. if (!has_edog && 610. (j = distu(nx, ny)) > 16 && j >= udist) continue; 611. 612. if ((info[i] & ALLOW_M) && MON_AT(nx, ny)) { 613. int mstatus; 614. register struct monst *mtmp2 = m_at(nx,ny); 615. 616. if ((int)mtmp2->m_lev >= (int)mtmp->m_lev+2 || 617. (mtmp2->data == &mons[PM_FLOATING_EYE] && rn2(10) && 618. mtmp->mcansee && haseyes(mtmp->data) && mtmp2->mcansee 619. && (perceives(mtmp->data) || !mtmp2->minvis)) || 620. (mtmp2->data==&mons[PM_GELATINOUS_CUBE] && rn2(10)) || 621. (max_passive_dmg(mtmp2, mtmp) >= mtmp->mhp) || 622. ((mtmp->mhp*4 < mtmp->mhpmax 623. || mtmp2->data->msound == MS_GUARDIAN 624. || mtmp2->data->msound == MS_LEADER) && 625. mtmp2->mpeaceful && !Conflict) || 626. (touch_petrifies(mtmp2->data) && 627. !resists_ston(mtmp))) 628. continue; 629. 630. if (after) return(0); /* hit only once each move */ 631. 632. notonhead = 0; 633. mstatus = mattackm(mtmp, mtmp2); 634. 635. /* aggressor (pet) died */ 636. if (mstatus & MM_AGR_DIED) return 2; 637. 638. if ((mstatus & MM_HIT) && !(mstatus & MM_DEF_DIED) && 639. rn2(4) && mtmp2->mlstmv != monstermoves && 640. !onscary(mtmp->mx, mtmp->my, mtmp2) && 641. /* monnear check needed: long worms hit on tail */ 642. monnear(mtmp2, mtmp->mx, mtmp->my)) { 643. mstatus = mattackm(mtmp2, mtmp); /* return attack */ 644. if (mstatus & MM_DEF_DIED) return 2; 645. } 646. 647. return 0; 648. } 649. 650. { /* Dog avoids harmful traps, but perhaps it has to pass one 651. * in order to follow player. (Non-harmful traps do not 652. * have ALLOW_TRAPS in info[].) The dog only avoids the 653. * trap if you've seen it, unlike enemies who avoid traps 654. * if they've seen some trap of that type sometime in the 655. * past. (Neither behavior is really realistic.) 656. */ 657. struct trap *trap; 658. 659. if ((info[i] & ALLOW_TRAPS) && (trap = t_at(nx,ny))) { 660. if (mtmp->mleashed) { 661. if (flags.soundok) whimper(mtmp); 662. } else 663. /* 1/40 chance of stepping on it anyway, in case 664. * it has to pass one to follow the player... 665. */ 666. if (trap->tseen && rn2(40)) continue; 667. } 668. } 669. 670. /* dog eschews cursed objects, but likes dog food */ 671. /* (minion isn't interested; `cursemsg' stays FALSE) */ 672. if (has_edog) 673. for (obj = level.objects[nx][ny]; obj; obj = obj->nexthere) { 674. if (obj->cursed) cursemsg[i] = TRUE; 675. else if ((otyp = dogfood(mtmp, obj)) < MANFOOD && 676. (otyp < ACCFOOD || edog->hungrytime <= monstermoves)) { 677. /* Note: our dog likes the food so much that he 678. * might eat it even when it conceals a cursed object */ 679. nix = nx; 680. niy = ny; 681. chi = i; 682. do_eat = TRUE; 683. cursemsg[i] = FALSE; /* not reluctant */ 684. goto newdogpos; 685. } 686. } 687. /* didn't find something to eat; if we saw a cursed item and 688. aren't being forced to walk on it, usually keep looking */ 689. if (cursemsg[i] && !mtmp->mleashed && uncursedcnt > 0 && 690. rn2(13 * uncursedcnt)) continue; 691. 692. /* lessen the chance of backtracking to previous position(s) */ 693. k = has_edog ? uncursedcnt : cnt; 694. for (j = 0; j < MTSZ && j < k - 1; j++) 695. if (nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y) 696. if (rn2(MTSZ * (k - j))) goto nxti; 697. 698. j = ((ndist = GDIST(nx,ny)) - nidist) * appr; 699. if ((j == 0 && !rn2(++chcnt)) || j < 0 || 700. (j > 0 && !whappr && 701. ((omx == nix && omy == niy && !rn2(3)) 702. || !rn2(12)) 703. )) { 704. nix = nx; 705. niy = ny; 706. nidist = ndist; 707. if(j < 0) chcnt = 0; 708. chi = i; 709. } 710. nxti: ; 711. } 712. newdogpos: 713. if (nix != omx || niy != omy) { 714. struct obj *mw_tmp; 715. 716. if (info[chi] & ALLOW_U) { 717. if (mtmp->mleashed) { /* play it safe */ 718. pline("%s breaks loose of %s leash!", 719. Monnam(mtmp), mhis(mtmp)); 720. m_unleash(mtmp, FALSE); 721. } 722. (void) mattacku(mtmp); 723. return(0); 724. } 725. if (!m_in_out_region(mtmp, nix, niy)) 726. return 1; 727. if(IS_ROCK(levl[nix][niy].typ) && may_dig(nix,niy) && 728. mtmp->weapon_check != NO_WEAPON_WANTED && 729. tunnels(mtmp->data) && needspick(mtmp->data) && 730. (!(mw_tmp = MON_WEP(mtmp)) || !is_pick(mw_tmp))) { 731. mtmp->weapon_check = NEED_PICK_AXE; 732. if (mon_wield_item(mtmp)) 733. return 0; 734. } 735. /* insert a worm_move() if worms ever begin to eat things */ 736. remove_monster(omx, omy); 737. place_monster(mtmp, nix, niy); 738. if (cursemsg[chi] && (cansee(omx,omy) || cansee(nix,niy))) 739. pline("%s moves only reluctantly.", Monnam(mtmp)); 740. for (j=MTSZ-1; j>0; j--) mtmp->mtrack[j] = mtmp->mtrack[j-1]; 741. mtmp->mtrack[0].x = omx; 742. mtmp->mtrack[0].y = omy; 743. /* We have to know if the pet's gonna do a combined eat and 744. * move before moving it, but it can't eat until after being 745. * moved. Thus the do_eat flag. 746. */ 747. if (do_eat) { 748. if (dog_eat(mtmp, obj, omx, omy, FALSE) == 2) return 2; 749. } 750. } else if (mtmp->mleashed && distu(omx, omy) > 4) { 751. /* an incredible kludge, but the only way to keep pooch near 752. * after it spends time eating or in a trap, etc. 753. */ 754. coord cc; 755. 756. nx = sgn(omx - u.ux); 757. ny = sgn(omy - u.uy); 758. cc.x = u.ux + nx; 759. cc.y = u.uy + ny; 760. if (goodpos(cc.x, cc.y, mtmp)) goto dognext; 761. 762. i = xytod(nx, ny); 763. for (j = (i + 7)%8; j < (i + 1)%8; j++) { 764. dtoxy(&cc, j); 765. if (goodpos(cc.x, cc.y, mtmp)) goto dognext; 766. } 767. for (j = (i + 6)%8; j < (i + 2)%8; j++) { 768. dtoxy(&cc, j); 769. if (goodpos(cc.x, cc.y, mtmp)) goto dognext; 770. } 771. cc.x = mtmp->mx; 772. cc.y = mtmp->my; 773. dognext: 774. if (!m_in_out_region(mtmp, nix, niy)) 775. return 1; 776. remove_monster(mtmp->mx, mtmp->my); 777. place_monster(mtmp, cc.x, cc.y); 778. newsym(cc.x,cc.y); 779. set_apparxy(mtmp); 780. } 781. return(1); 782. } 783. 784. /* Hack to prevent a dog from being endlessly stuck near a piece of food that 785. * it can't reach, such as caught in a teleport scroll niche. It recursively 786. * checks to see if the squares inbetween are good. The checking could be a 787. * little smarter; a full check would probably be useful in m_move() too. 788. * Since the maximum food distance is 5, this should never be more than 5 calls 789. * deep. 790. */ 791. STATIC_OVL boolean 792. can_reach_food(mon, mx, my, fx, fy) 793. struct monst *mon; 794. xchar mx, my, fx, fy; 795. { 796. int i, j; 797. int dist; 798. 799. if (mx == fx && my == fy) return TRUE; 800. if (!isok(mx, my)) return FALSE; /* should not happen */ 801. 802. dist = dist2(mx, my, fx, fy); 803. for(i=mx-1; i<=mx+1; i++) { 804. for(j=my-1; j<=my+1; j++) { 805. if (!isok(i, j)) 806. continue; 807. if (dist2(i, j, fx, fy) >= dist) 808. continue; 809. if (IS_ROCK(levl[i][j].typ) && !passes_walls(mon->data) && 810. (!may_dig(i,j) || !tunnels(mon->data))) 811. continue; 812. if (IS_DOOR(levl[i][j].typ) && 813. (levl[i][j].doormask & (D_CLOSED | D_LOCKED))) 814. continue; 815. if (is_pool(i, j) && !is_swimmer(mon->data)) 816. continue; 817. if (is_lava(i, j) && !likes_lava(mon->data)) 818. continue; 819. if (sobj_at(BOULDER,i,j) && !throws_rocks(mon->data)) 820. continue; 821. if (can_reach_food(mon, i, j, fx, fy)) 822. return TRUE; 823. } 824. } 825. return FALSE; 826. } 827. 828. #endif /* OVL0 */ 829. #ifdef OVLB 830. 831. /*ARGSUSED*/ /* do_clear_area client */ 832. STATIC_PTR void 833. wantdoor(x, y, distance) 834. int x, y; 835. genericptr_t distance; 836. { 837. int ndist; 838. 839. if (*(int*)distance > (ndist = distu(x, y))) { 840. gx = x; 841. gy = y; 842. *(int*)distance = ndist; 843. } 844. } 845. 846. #endif /* OVLB */ 847. 848. /*dogmove.c*/
