Source:NetHack 3.3.0/dogmove.c
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Below is the full text to dogmove.c from the source code of NetHack 3.3.0. To link to a particular line, write [[NetHack 3.3.0/dogmove.c#line123]], for example.
Warning! This is the source code from an old release. For the latest release, see Source code
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1. /* SCCS Id: @(#)dogmove.c 3.3 97/05/25 */ 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. 20. STATIC_OVL struct obj * 21. DROPPABLES(mon) 22. register struct monst *mon; 23. { 24. register struct obj *obj; 25. struct obj *wep = MON_WEP(mon); 26. boolean item1 = FALSE, item2 = FALSE; 27. 28. if (is_animal(mon->data) || mindless(mon->data)) 29. item1 = item2 = TRUE; 30. if (!tunnels(mon->data) || !needspick(mon->data)) 31. item1 = TRUE; 32. for(obj = mon->minvent; obj; obj = obj->nobj) { 33. if (!item1 && is_pick(obj)) { 34. item1 = TRUE; 35. continue; 36. } 37. if (!item2 && obj->otyp == UNICORN_HORN && !obj->cursed) { 38. item2 = TRUE; 39. continue; 40. } 41. if (!obj->owornmask && obj != wep) return obj; 42. } 43. return (struct obj *)0; 44. } 45. 46. static NEARDATA const char nofetch[] = { BALL_CLASS, CHAIN_CLASS, ROCK_CLASS, 0 }; 47. 48. #endif /* OVL0 */ 49. 50. STATIC_OVL boolean FDECL(cursed_object_at, (int, int)); 51. 52. STATIC_VAR xchar gtyp, gx, gy; /* type and position of dog's current goal */ 53. 54. STATIC_PTR void FDECL(wantdoor, (int, int, genericptr_t)); 55. 56. #ifdef OVLB 57. STATIC_OVL boolean 58. cursed_object_at(x, y) 59. int x, y; 60. { 61. struct obj *otmp; 62. 63. for(otmp = level.objects[x][y]; otmp; otmp = otmp->nexthere) 64. if (otmp->cursed) return TRUE; 65. return FALSE; 66. } 67. 68. int 69. dog_nutrition(mtmp, obj) 70. struct monst *mtmp; 71. struct obj *obj; 72. { 73. int nutrit; 74. 75. /* 76. * It is arbitrary that the pet takes the same length of time to eat 77. * as a human, but gets more nutritional value. 78. */ 79. if (obj->oclass == FOOD_CLASS) { 80. if(obj->otyp == CORPSE) { 81. mtmp->meating = 3 + (mons[obj->corpsenm].cwt >> 6); 82. nutrit = mons[obj->corpsenm].cnutrit; 83. } else { 84. mtmp->meating = objects[obj->otyp].oc_delay; 85. nutrit = objects[obj->otyp].oc_nutrition; 86. } 87. switch(mtmp->data->msize) { 88. case MZ_TINY: nutrit *= 8; break; 89. case MZ_SMALL: nutrit *= 6; break; 90. default: 91. case MZ_MEDIUM: nutrit *= 5; break; 92. case MZ_LARGE: nutrit *= 4; break; 93. case MZ_HUGE: nutrit *= 3; break; 94. case MZ_GIGANTIC: nutrit *= 2; break; 95. } 96. if(obj->oeaten) { 97. mtmp->meating = eaten_stat(mtmp->meating, obj); 98. nutrit = eaten_stat(nutrit, obj); 99. } 100. } else if (obj->oclass == GOLD_CLASS) { 101. mtmp->meating = (int)(obj->quan/2000) + 1; 102. if (mtmp->meating < 0) mtmp->meating = 1; 103. nutrit = (int)(obj->quan/20); 104. if (nutrit < 0) nutrit = 0; 105. } else { 106. /* Unusual pet such as gelatinous cube eating odd stuff. 107. * meating made consistent with wild monsters in mon.c. 108. * nutrit made consistent with polymorphed player nutrit in 109. * eat.c. (This also applies to pets eating gold.) 110. */ 111. mtmp->meating = obj->owt/20 + 1; 112. nutrit = 5*objects[obj->otyp].oc_nutrition; 113. } 114. return nutrit; 115. } 116. 117. /* returns 2 if pet dies, otherwise 1 */ 118. int 119. dog_eat(mtmp, obj, x, y, devour) 120. register struct monst *mtmp; 121. register struct obj * obj; 122. int x, y; 123. boolean devour; 124. { 125. register struct edog *edog = EDOG(mtmp); 126. boolean poly = FALSE, grow = FALSE, heal = FALSE; 127. int nutrit; 128. 129. if(edog->hungrytime < monstermoves) 130. edog->hungrytime = monstermoves; 131. nutrit = dog_nutrition(mtmp, obj); 132. poly = polyfodder(obj); 133. grow = mlevelgain(obj); 134. heal = mhealup(obj); 135. if (devour) { 136. if (mtmp->meating > 1) mtmp->meating /= 2; 137. if (nutrit > 1) nutrit = (nutrit * 3) / 4; 138. } 139. edog->hungrytime += nutrit; 140. mtmp->mconf = 0; 141. if (mtmp->mflee && mtmp->mfleetim > 1) mtmp->mfleetim /= 2; 142. if (mtmp->mtame < 20) mtmp->mtame++; 143. if (x != mtmp->mx || y != mtmp->my) { /* moved & ate on same turn */ 144. newsym(x, y); 145. newsym(mtmp->mx, mtmp->my); 146. } 147. if (is_pool(x, y) && !Underwater) { 148. /* Don't print obj */ 149. /* TODO: Reveal presence of sea monster (especially sharks) */ 150. } else 151. /* hack: observe the action if either new or old location is in view */ 152. if (cansee(x, y) || cansee(mtmp->mx, mtmp->my)) 153. pline("%s %s %s.", Monnam(mtmp), 154. devour ? "devours" : "eats", 155. (obj->oclass == FOOD_CLASS) ? 156. singular(obj, doname) : doname(obj)); 157. /* It's a reward if it's DOGFOOD and the player dropped/threw it. */ 158. /* We know the player had it if invlet is set -dlc */ 159. if(dogfood(mtmp,obj) == DOGFOOD && obj->invlet) 160. #ifdef LINT 161. edog->apport = 0; 162. #else 163. edog->apport += (int)(200L/ 164. ((long)edog->dropdist + monstermoves - edog->droptime)); 165. #endif 166. if (mtmp->data == &mons[PM_RUST_MONSTER] && obj->oerodeproof) { 167. /* The object's rustproofing is gone now */ 168. obj->oerodeproof = 0; 169. mtmp->mstun = 1; 170. if (canseemon(mtmp) && flags.verbose) { 171. pline("%s spits %s out in disgust!", 172. Monnam(mtmp), distant_name(obj,doname)); 173. } 174. } else if (obj == uball) { 175. unpunish(); 176. delobj(obj); 177. } else if (obj == uchain) 178. unpunish(); 179. else if (obj->quan > 1L && obj->oclass == FOOD_CLASS) 180. obj->quan--; 181. else 182. delobj(obj); 183. 184. if (poly) { 185. char oldpet[BUFSZ]; 186. #ifdef STEED 187. long mw = mtmp->misc_worn_check; 188. 189. mtmp->misc_worn_check &= ~W_SADDLE; 190. #endif 191. Strcpy(oldpet, Monnam(mtmp)); 192. #ifdef STEED 193. mtmp->misc_worn_check = mw; 194. #endif 195. if (newcham(mtmp, (struct permonst *)0) && 196. cansee(mtmp->mx, mtmp->my)) { 197. uchar save_mnamelth = mtmp->mnamelth; 198. mtmp->mnamelth = 0; 199. pline("%s turns into %s!", oldpet, a_monnam(mtmp)); 200. mtmp->mnamelth = save_mnamelth; 201. } 202. } 203. /* limit "instant" growth to prevent potential abuse */ 204. if (grow && (int) mtmp->m_lev < (int)mtmp->data->mlevel + 15) { 205. if (!grow_up(mtmp, (struct monst *)0)) return 2; 206. } 207. if (heal) mtmp->mhp = mtmp->mhpmax; 208. return 1; 209. } 210. 211. #endif /* OVLB */ 212. #ifdef OVL0 213. 214. /* hunger effects -- returns TRUE on starvation */ 215. STATIC_OVL boolean 216. dog_hunger(mtmp, edog) 217. register struct monst *mtmp; 218. register struct edog *edog; 219. { 220. if (monstermoves > edog->hungrytime + 500) { 221. if (!carnivorous(mtmp->data) && !herbivorous(mtmp->data)) { 222. edog->hungrytime = monstermoves + 500; 223. /* but not too high; it might polymorph */ 224. } else if (!mtmp->mconf) { 225. mtmp->mconf = 1; 226. mtmp->mhpmax /= 3; 227. if (mtmp->mhp > mtmp->mhpmax) 228. mtmp->mhp = mtmp->mhpmax; 229. if (mtmp->mhp < 1) goto dog_died; 230. if (cansee(mtmp->mx, mtmp->my)) 231. pline("%s is confused from hunger.", Monnam(mtmp)); 232. else if (couldsee(mtmp->mx, mtmp->my)) 233. beg(mtmp); 234. else 235. You_feel("worried about %s.", y_monnam(mtmp)); 236. } else if (monstermoves > edog->hungrytime + 750 || mtmp->mhp < 1) { 237. dog_died: 238. if (mtmp->mleashed) 239. Your("leash goes slack."); 240. else if (cansee(mtmp->mx, mtmp->my)) 241. pline("%s dies%s.", Monnam(mtmp), 242. (mtmp->mhp >= 1) ? "" : " from hunger"); 243. else 244. You_feel("%s for a moment.", 245. Hallucination ? "bummed" : "sad"); 246. mondied(mtmp); 247. return(TRUE); 248. } 249. } 250. return(FALSE); 251. } 252. 253. /* do something with object (drop, pick up, eat) at current position 254. * returns 1 if object eaten (since that counts as dog's move), 2 if died 255. */ 256. STATIC_OVL int 257. dog_invent(mtmp, edog, udist) 258. register struct monst *mtmp; 259. register struct edog *edog; 260. int udist; 261. { 262. register int omx, omy; 263. struct obj *obj; 264. 265. if (mtmp->msleeping || !mtmp->mcanmove) return(0); 266. 267. omx = mtmp->mx; 268. omy = mtmp->my; 269. 270. /* if we are carrying sth then we drop it (perhaps near @) */ 271. /* Note: if apport == 1 then our behaviour is independent of udist */ 272. /* Use udist+1 so steed won't cause divide by zero */ 273. if(DROPPABLES(mtmp) || mtmp->mgold) { 274. if (!rn2(udist+1) || !rn2(edog->apport)) 275. if(rn2(10) < edog->apport){ 276. relobj(mtmp, (int)mtmp->minvis, TRUE); 277. if(edog->apport > 1) edog->apport--; 278. edog->dropdist = udist; /* hpscdi!jon */ 279. edog->droptime = monstermoves; 280. } 281. } else { 282. if((obj=level.objects[omx][omy]) && !index(nofetch,obj->oclass) 283. #ifdef MAIL 284. && obj->otyp != SCR_MAIL 285. #endif 286. ){ 287. if (dogfood(mtmp, obj) <= CADAVER) 288. return dog_eat(mtmp, obj, omx, omy, FALSE); 289. 290. if(can_carry(mtmp, obj) && !obj->cursed) 291. if(rn2(20) < edog->apport+3) 292. if (rn2(udist) || !rn2(edog->apport)) { 293. if (cansee(omx, omy) && flags.verbose) 294. pline("%s picks up %s.", Monnam(mtmp), 295. distant_name(obj, doname)); 296. obj_extract_self(obj); 297. newsym(omx,omy); 298. mpickobj(mtmp,obj); 299. if (attacktype(mtmp->data, AT_WEAP)) { 300. mtmp->weapon_check = NEED_HTH_WEAPON; 301. (void) mon_wield_item(mtmp); 302. } 303. } 304. } 305. } 306. return 0; 307. } 308. 309. /* set dog's goal -- gtyp, gx, gy 310. * returns -1/0/1 (dog's desire to approach player) or -2 (abort move) 311. */ 312. STATIC_OVL int 313. dog_goal(mtmp, edog, after, udist, whappr) 314. register struct monst *mtmp; 315. struct edog *edog; 316. int after, udist, whappr; 317. { 318. register int omx, omy; 319. boolean in_masters_sight; 320. register struct obj *obj; 321. xchar otyp; 322. int appr; 323. 324. 325. #ifdef STEED 326. /* Steeds don't move on their own will */ 327. if (mtmp == u.usteed) 328. return (-2); 329. #endif 330. 331. omx = mtmp->mx; 332. omy = mtmp->my; 333. 334. in_masters_sight = couldsee(omx, omy); 335. 336. if (!edog || mtmp->mleashed) { /* he's not going anywhere... */ 337. gtyp = APPORT; 338. gx = u.ux; 339. gy = u.uy; 340. } else { 341. #define DDIST(x,y) (dist2(x,y,omx,omy)) 342. #define SQSRCHRADIUS 5 343. int min_x, max_x, min_y, max_y; 344. register int nx, ny; 345. 346. gtyp = UNDEF; /* no goal as yet */ 347. gx = gy = 0; /* suppress 'used before set' message */ 348. 349. if ((min_x = omx - SQSRCHRADIUS) < 0) min_x = 0; 350. if ((max_x = omx + SQSRCHRADIUS) >= COLNO) max_x = COLNO - 1; 351. if ((min_y = omy - SQSRCHRADIUS) < 0) min_y = 0; 352. if ((max_y = omy + SQSRCHRADIUS) >= ROWNO) max_y = ROWNO - 1; 353. 354. /* nearby food is the first choice, then other objects */ 355. for (obj = fobj; obj; obj = obj->nobj) { 356. nx = obj->ox; 357. ny = obj->oy; 358. if (nx >= min_x && nx <= max_x && ny >= min_y && ny <= max_y) { 359. otyp = dogfood(mtmp, obj); 360. if (otyp > gtyp || otyp == UNDEF) 361. continue; 362. if (cursed_object_at(nx, ny)) 363. continue; 364. if (otyp < MANFOOD) { 365. if (otyp < gtyp || DDIST(nx,ny) < DDIST(gx,gy)) { 366. gx = nx; 367. gy = ny; 368. gtyp = otyp; 369. } 370. } else if(gtyp == UNDEF && in_masters_sight && 371. !mtmp->minvent && 372. (!levl[omx][omy].lit || levl[u.ux][u.uy].lit) && 373. (otyp == MANFOOD || m_cansee(mtmp, nx, ny)) && 374. edog->apport > rn2(8) && 375. can_carry(mtmp,obj)) { 376. gx = nx; 377. gy = ny; 378. gtyp = APPORT; 379. } 380. } 381. } 382. } 383. 384. /* follow player if appropriate */ 385. if (gtyp == UNDEF || 386. (gtyp != DOGFOOD && gtyp != APPORT && monstermoves < edog->hungrytime)) { 387. gx = u.ux; 388. gy = u.uy; 389. if (after && udist <= 4 && gx == u.ux && gy == u.uy) 390. return(-2); 391. appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0; 392. if (udist > 1) { 393. if (!IS_ROOM(levl[u.ux][u.uy].typ) || !rn2(4) || 394. whappr || 395. (mtmp->minvent && rn2(edog->apport))) 396. appr = 1; 397. } 398. /* if you have dog food it'll follow you more closely */ 399. if (appr == 0) { 400. obj = invent; 401. while (obj) { 402. if(dogfood(mtmp, obj) == DOGFOOD) { 403. appr = 1; 404. break; 405. } 406. obj = obj->nobj; 407. } 408. } 409. } else 410. appr = 1; /* gtyp != UNDEF */ 411. if(mtmp->mconf) 412. appr = 0; 413. 414. #define FARAWAY (COLNO + 2) /* position outside screen */ 415. if (gx == u.ux && gy == u.uy && !in_masters_sight) { 416. register coord *cp; 417. 418. cp = gettrack(omx,omy); 419. if (cp) { 420. gx = cp->x; 421. gy = cp->y; 422. if(edog) edog->ogoal.x = 0; 423. } else { 424. /* assume master hasn't moved far, and reuse previous goal */ 425. if(edog && edog->ogoal.x && 426. ((edog->ogoal.x != omx) || (edog->ogoal.y != omy))) { 427. gx = edog->ogoal.x; 428. gy = edog->ogoal.y; 429. edog->ogoal.x = 0; 430. } else { 431. int fardist = FARAWAY * FARAWAY; 432. gx = gy = FARAWAY; /* random */ 433. do_clear_area(omx, omy, 9, wantdoor, 434. (genericptr_t)&fardist); 435. 436. /* here gx == FARAWAY e.g. when dog is in a vault */ 437. if (gx == FARAWAY || (gx == omx && gy == omy)) { 438. gx = u.ux; 439. gy = u.uy; 440. } else if(edog) { 441. edog->ogoal.x = gx; 442. edog->ogoal.y = gy; 443. } 444. } 445. } 446. } else if(edog) { 447. edog->ogoal.x = 0; 448. } 449. return appr; 450. } 451. 452. /* return 0 (no move), 1 (move) or 2 (dead) */ 453. int 454. dog_move(mtmp, after) 455. register struct monst *mtmp; 456. register int after; /* this is extra fast monster movement */ 457. { 458. int omx, omy; /* original mtmp position */ 459. int appr, whappr, udist; 460. int i, j, k; 461. register struct edog *edog = EDOG(mtmp); 462. struct obj *obj = (struct obj *) 0; 463. xchar otyp; 464. boolean has_edog, cursemsg[9], do_eat = FALSE; 465. xchar nix, niy; /* position mtmp is (considering) moving to */ 466. register int nx, ny; /* temporary coordinates */ 467. xchar cnt, uncursedcnt, chcnt; 468. int chi = -1, nidist, ndist; 469. coord poss[9]; 470. long info[9], allowflags; 471. #define GDIST(x,y) (dist2(x,y,gx,gy)) 472. 473. /* 474. * Tame Angels have isminion set and an ispriest structure instead of 475. * an edog structure. Fortunately, guardian Angels need not worry 476. * about mundane things like eating and fetching objects, and can 477. * spend all their energy defending the player. (They are the only 478. * monsters with other structures that can be tame.) 479. */ 480. has_edog = !mtmp->isminion; 481. 482. omx = mtmp->mx; 483. omy = mtmp->my; 484. if (has_edog && dog_hunger(mtmp, edog)) return(2); /* starved */ 485. 486. udist = distu(omx,omy); 487. #ifdef STEED 488. /* Let steeds eat */ 489. if (mtmp == u.usteed) 490. udist = 1; 491. else 492. #endif 493. /* maybe we tamed him while being swallowed --jgm */ 494. if (!udist) return(0); 495. 496. nix = omx; /* set before newdogpos */ 497. niy = omy; 498. cursemsg[0] = FALSE; /* lint suppression */ 499. info[0] = 0; /* ditto */ 500. 501. if (has_edog) { 502. j = dog_invent(mtmp, edog, udist); 503. if (j == 2) return 2; /* died */ 504. else if (j == 1) goto newdogpos; /* eating something */ 505. 506. whappr = (monstermoves - edog->whistletime < 5); 507. } else 508. whappr = 0; 509. 510. appr = dog_goal(mtmp, has_edog ? edog : (struct edog *)0, 511. after, udist, whappr); 512. if (appr == -2) return(0); 513. 514. allowflags = ALLOW_M | ALLOW_TRAPS | ALLOW_SSM | ALLOW_SANCT; 515. if (passes_walls(mtmp->data)) allowflags |= (ALLOW_ROCK|ALLOW_WALL); 516. if (throws_rocks(mtmp->data)) allowflags |= ALLOW_ROCK; 517. if (Conflict && !resist(mtmp, RING_CLASS, 0, 0)) { 518. allowflags |= ALLOW_U; 519. if (!has_edog) { 520. coord mm; 521. /* Guardian angel refuses to be conflicted; rather, 522. * it disappears, angrily, and sends in some nasties 523. */ 524. if (canspotmon(mtmp)) { 525. pline("%s rebukes you, saying:", Monnam(mtmp)); 526. verbalize("Since you desire conflict, have some more!"); 527. } 528. mongone(mtmp); 529. i = rnd(4); 530. while(i--) { 531. mm.x = u.ux; 532. mm.y = u.uy; 533. if(enexto(&mm, mm.x, mm.y, &mons[PM_ANGEL])) 534. (void) mk_roamer(&mons[PM_ANGEL], u.ualign.type, 535. mm.x, mm.y, FALSE); 536. } 537. return(2); 538. 539. } 540. } 541. if (!nohands(mtmp->data) && !verysmall(mtmp->data)) { 542. allowflags |= OPENDOOR; 543. if (m_carrying(mtmp, SKELETON_KEY)) allowflags |= BUSTDOOR; 544. } 545. if (is_giant(mtmp->data)) allowflags |= BUSTDOOR; 546. if (tunnels(mtmp->data) && !needspick(mtmp->data)) 547. allowflags |= ALLOW_DIG; 548. cnt = mfndpos(mtmp, poss, info, allowflags); 549. 550. /* Normally dogs don't step on cursed items, but if they have no 551. * other choice they will. This requires checking ahead of time 552. * to see how many uncursed item squares are around. 553. */ 554. uncursedcnt = 0; 555. for (i = 0; i < cnt; i++) { 556. nx = poss[i].x; ny = poss[i].y; 557. if (MON_AT(nx,ny) && !(info[i] & ALLOW_M)) continue; 558. if (cursed_object_at(nx, ny)) continue; 559. uncursedcnt++; 560. } 561. 562. chcnt = 0; 563. chi = -1; 564. nidist = GDIST(nix,niy); 565. 566. for (i = 0; i < cnt; i++) { 567. nx = poss[i].x; 568. ny = poss[i].y; 569. cursemsg[i] = FALSE; 570. 571. /* if leashed, we drag him along. */ 572. if (mtmp->mleashed && distu(nx, ny) > 4) continue; 573. 574. /* if a guardian, try to stay close by choice */ 575. if (!has_edog && 576. (j = distu(nx, ny)) > 16 && j >= udist) continue; 577. 578. if ((info[i] & ALLOW_M) && MON_AT(nx, ny)) { 579. int mstatus; 580. register struct monst *mtmp2 = m_at(nx,ny); 581. 582. if ((int)mtmp2->m_lev >= (int)mtmp->m_lev+2 || 583. (mtmp2->data == &mons[PM_FLOATING_EYE] && rn2(10) && 584. mtmp->mcansee && haseyes(mtmp->data) && mtmp2->mcansee 585. && (perceives(mtmp->data) || !mtmp2->minvis)) || 586. (mtmp2->data==&mons[PM_GELATINOUS_CUBE] && rn2(10)) || 587. (max_passive_dmg(mtmp2, mtmp) >= mtmp->mhp) || 588. ((mtmp->mhp*4 < mtmp->mhpmax 589. || mtmp2->data->msound == MS_GUARDIAN 590. || mtmp2->data->msound == MS_LEADER) && 591. mtmp2->mpeaceful && !Conflict) || 592. (touch_petrifies(mtmp2->data) && 593. !resists_ston(mtmp))) 594. continue; 595. 596. if (after) return(0); /* hit only once each move */ 597. 598. notonhead = 0; 599. mstatus = mattackm(mtmp, mtmp2); 600. 601. /* aggressor (pet) died */ 602. if (mstatus & MM_AGR_DIED) return 2; 603. 604. if ((mstatus & MM_HIT) && !(mstatus & MM_DEF_DIED) && 605. rn2(4) && mtmp2->mlstmv != monstermoves && 606. !onscary(mtmp->mx, mtmp->my, mtmp2) && 607. /* monnear check needed: long worms hit on tail */ 608. monnear(mtmp2, mtmp->mx, mtmp->my)) { 609. mstatus = mattackm(mtmp2, mtmp); /* return attack */ 610. if (mstatus & MM_DEF_DIED) return 2; 611. } 612. 613. return 0; 614. } 615. 616. { /* Dog avoids harmful traps, but perhaps it has to pass one 617. * in order to follow player. (Non-harmful traps do not 618. * have ALLOW_TRAPS in info[].) The dog only avoids the 619. * trap if you've seen it, unlike enemies who avoid traps 620. * if they've seen some trap of that type sometime in the 621. * past. (Neither behavior is really realistic.) 622. */ 623. struct trap *trap; 624. 625. if ((info[i] & ALLOW_TRAPS) && (trap = t_at(nx,ny))) { 626. if (mtmp->mleashed) { 627. if (flags.soundok) whimper(mtmp); 628. } else 629. /* 1/40 chance of stepping on it anyway, in case 630. * it has to pass one to follow the player... 631. */ 632. if (trap->tseen && rn2(40)) continue; 633. } 634. } 635. 636. /* dog eschews cursed objects, but likes dog food */ 637. /* (minion isn't interested; `cursemsg' stays FALSE) */ 638. if (has_edog) 639. for (obj = level.objects[nx][ny]; obj; obj = obj->nexthere) { 640. if (obj->cursed) cursemsg[i] = TRUE; 641. else if ((otyp = dogfood(mtmp, obj)) < MANFOOD && 642. (otyp < ACCFOOD || edog->hungrytime <= monstermoves)) { 643. /* Note: our dog likes the food so much that he 644. * might eat it even when it conceals a cursed object */ 645. nix = nx; 646. niy = ny; 647. chi = i; 648. do_eat = TRUE; 649. cursemsg[i] = FALSE; /* not reluctant */ 650. goto newdogpos; 651. } 652. } 653. /* didn't find something to eat; if we saw a cursed item and 654. aren't being forced to walk on it, usually keep looking */ 655. if (cursemsg[i] && !mtmp->mleashed && uncursedcnt > 0 && 656. rn2(13 * uncursedcnt)) continue; 657. 658. /* lessen the chance of backtracking to previous position(s) */ 659. k = has_edog ? uncursedcnt : cnt; 660. for (j = 0; j < MTSZ && j < k - 1; j++) 661. if (nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y) 662. if (rn2(MTSZ * (k - j))) goto nxti; 663. 664. j = ((ndist = GDIST(nx,ny)) - nidist) * appr; 665. if ((j == 0 && !rn2(++chcnt)) || j < 0 || 666. (j > 0 && !whappr && 667. ((omx == nix && omy == niy && !rn2(3)) 668. || !rn2(12)) 669. )) { 670. nix = nx; 671. niy = ny; 672. nidist = ndist; 673. if(j < 0) chcnt = 0; 674. chi = i; 675. } 676. nxti: ; 677. } 678. newdogpos: 679. if (nix != omx || niy != omy) { 680. if (info[chi] & ALLOW_U) { 681. if (mtmp->mleashed) { /* play it safe */ 682. pline("%s breaks loose of %s leash!", 683. Monnam(mtmp), his[pronoun_gender(mtmp)]); 684. m_unleash(mtmp); 685. } 686. (void) mattacku(mtmp); 687. return(0); 688. } 689. if (!m_in_out_region(mtmp, nix, niy)) 690. return 1; 691. /* insert a worm_move() if worms ever begin to eat things */ 692. remove_monster(omx, omy); 693. place_monster(mtmp, nix, niy); 694. if (cursemsg[chi] && (cansee(omx,omy) || cansee(nix,niy))) 695. pline("%s moves only reluctantly.", Monnam(mtmp)); 696. for (j=MTSZ-1; j>0; j--) mtmp->mtrack[j] = mtmp->mtrack[j-1]; 697. mtmp->mtrack[0].x = omx; 698. mtmp->mtrack[0].y = omy; 699. /* We have to know if the pet's gonna do a combined eat and 700. * move before moving it, but it can't eat until after being 701. * moved. Thus the do_eat flag. 702. */ 703. if (do_eat) { 704. if (dog_eat(mtmp, obj, omx, omy, FALSE) == 2) return 2; 705. } 706. } else if (mtmp->mleashed && distu(omx, omy) > 4) { 707. /* an incredible kludge, but the only way to keep pooch near 708. * after it spends time eating or in a trap, etc. 709. */ 710. coord cc; 711. 712. nx = sgn(omx - u.ux); 713. ny = sgn(omy - u.uy); 714. cc.x = u.ux + nx; 715. cc.y = u.uy + ny; 716. if (goodpos(cc.x, cc.y, mtmp)) goto dognext; 717. 718. i = xytod(nx, ny); 719. for (j = (i + 7)%8; j < (i + 1)%8; j++) { 720. dtoxy(&cc, j); 721. if (goodpos(cc.x, cc.y, mtmp)) goto dognext; 722. } 723. for (j = (i + 6)%8; j < (i + 2)%8; j++) { 724. dtoxy(&cc, j); 725. if (goodpos(cc.x, cc.y, mtmp)) goto dognext; 726. } 727. cc.x = mtmp->mx; 728. cc.y = mtmp->my; 729. dognext: 730. if (!m_in_out_region(mtmp, nix, niy)) 731. return 1; 732. remove_monster(mtmp->mx, mtmp->my); 733. place_monster(mtmp, cc.x, cc.y); 734. newsym(cc.x,cc.y); 735. set_apparxy(mtmp); 736. } 737. return(1); 738. } 739. 740. #endif /* OVL0 */ 741. #ifdef OVLB 742. 743. /*ARGSUSED*/ /* do_clear_area client */ 744. STATIC_PTR void 745. wantdoor(x, y, distance) 746. int x, y; 747. genericptr_t distance; 748. { 749. int ndist; 750. 751. if (*(int*)distance > (ndist = distu(x, y))) { 752. gx = x; 753. gy = y; 754. *(int*)distance = ndist; 755. } 756. } 757. 758. #endif /* OVLB */ 759. 760. /*dogmove.c*/
