| abstract
| - Below is the full text to dogmove.c from the source code of NetHack 1.3d. To link to a particular line, write [[NetHack 1.3d/dogmove.c#line123]], for example. Warning! This is the source code from an old release. For the latest release, see Source code 1. /* SCCS Id: @(#)dogmove.c 1.3 87/07/14 2. /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */ 3. /* dogmove.c - version 1.0 */ 4. 5. #include "hack.h" 6. #include "mfndpos.h" 7. #include "mkroom.h" 8. #include "edog.h" 9. 10. /* return 0 (no move), 1 (move) or 2 (dead) */ 11. dog_move(mtmp, after) register struct monst *mtmp; { 12. #ifndef REGBUG 13. register 14. #endif 15. int nx,ny,omx,omy,appr,nearer,j; 16. int udist,chi,i,whappr; 17. register struct monst *mtmp2; 18. register struct permonst *mdat = mtmp->data; 19. register struct edog *edog = EDOG(mtmp); 20. struct obj *obj; 21. struct trap *trap; 22. xchar cnt,chcnt,nix,niy; 23. schar dogroom,uroom; 24. xchar gx,gy,gtyp,otyp; /* current goal */ 25. coord poss[9]; 26. long info[9]; 27. #define GDIST(x,y) ((x-gx)*(x-gx) + (y-gy)*(y-gy)) 28. #define DDIST(x,y) ((x-omx)*(x-omx) + (y-omy)*(y-omy)) 29. 30. if(moves <= edog->eattime) return(0); /* dog is still eating */ 31. omx = mtmp->mx; 32. omy = mtmp->my; 33. whappr = (moves - EDOG(mtmp)->whistletime < 5); 34. if(moves > edog->hungrytime + 500 && !mtmp->mconf){ 35. mtmp->mconf = 1; 36. mtmp->mhpmax /= 3; 37. if(mtmp->mhp > mtmp->mhpmax) 38. mtmp->mhp = mtmp->mhpmax; 39. if(cansee(omx,omy)) 40. pline("%s is confused from hunger.", Monnam(mtmp)); 41. else pline("You feel worried about %s.", monnam(mtmp)); 42. } else 43. if(moves > edog->hungrytime + 750 || mtmp->mhp < 1){ 44. if(cansee(omx,omy)) 45. pline("%s dies from hunger.", Monnam(mtmp)); 46. else 47. #ifdef WALKIES 48. mtmp->mleashed = 0; 49. pline("Your leash goes slack..."); 50. #endif 51. pline("You have a sad feeling for a moment, then it passes."); 52. mondied(mtmp); 53. return(2); 54. } 55. dogroom = inroom(omx,omy); 56. uroom = inroom(u.ux,u.uy); 57. udist = dist(omx,omy); 58. 59. /* maybe we tamed him while being swallowed --jgm */ 60. if(!udist) return(0); 61. 62. /* if we are carrying sth then we drop it (perhaps near @) */ 63. /* Note: if apport == 1 then our behaviour is independent of udist */ 64. if(mtmp->minvent){ 65. if(!rn2(udist) || !rn2((int) edog->apport)) 66. if(rn2(10) < edog->apport){ 67. relobj(mtmp, (int) mtmp->minvis); 68. if(edog->apport > 1) edog->apport--; 69. edog->dropdist = udist; /* hpscdi!jon */ 70. edog->droptime = moves; 71. } 72. } else { 73. if(obj = o_at(omx,omy)) if(!index("0_", obj->olet)){ 74. if((otyp = dogfood(obj)) <= CADAVER){ 75. nix = omx; 76. niy = omy; 77. goto eatobj; 78. } 79. if(obj->owt < 10*mtmp->data->mlevel) 80. if(rn2(20) < edog->apport+3) 81. if(rn2(udist) || !rn2((int) edog->apport)){ 82. freeobj(obj); 83. unpobj(obj); 84. /* if(levl[omx][omy].scrsym == obj->olet) 85. newsym(omx,omy); */ 86. mpickobj(mtmp,obj); 87. } 88. } 89. } 90. 91. gtyp = UNDEF; /* no goal as yet */ 92. gx = gy = 0; /* suppress 'used before set' message */ 93. #ifdef WALKIES 94. /* If he's on a leash, he's not going anywhere. */ 95. if(mtmp->mleashed) { 96. 97. gtyp = APPORT; 98. gx = u.ux; 99. gy = u.uy; 100. } else 101. #endif 102. /* first we look for food */ 103. for(obj = fobj; obj; obj = obj->nobj) { 104. otyp = dogfood(obj); 105. if(otyp > gtyp || otyp == UNDEF) continue; 106. if(inroom(obj->ox,obj->oy) != dogroom) continue; 107. if(otyp < MANFOOD && 108. (dogroom >= 0 || DDIST(obj->ox,obj->oy) < 10)) { 109. if(otyp < gtyp || (otyp == gtyp && 110. DDIST(obj->ox,obj->oy) < DDIST(gx,gy))){ 111. gx = obj->ox; 112. gy = obj->oy; 113. gtyp = otyp; 114. } 115. } else 116. if(gtyp == UNDEF && dogroom >= 0 && 117. uroom == dogroom && 118. !mtmp->minvent && edog->apport > rn2(8)){ 119. gx = obj->ox; 120. gy = obj->oy; 121. gtyp = APPORT; 122. } 123. } 124. 125. if(gtyp == UNDEF || 126. (gtyp != DOGFOOD && gtyp != APPORT && moves < edog->hungrytime)){ 127. if(dogroom < 0 || dogroom == uroom){ 128. gx = u.ux; 129. gy = u.uy; 130. #ifndef QUEST 131. } else { 132. int tmp = rooms[dogroom].fdoor; 133. cnt = rooms[dogroom].doorct; 134. 135. gx = gy = FAR; /* random, far away */ 136. while(cnt--){ 137. if(dist(gx,gy) > 138. dist(doors[tmp].x, doors[tmp].y)){ 139. gx = doors[tmp].x; 140. gy = doors[tmp].y; 141. } 142. tmp++; 143. } 144. /* here gx == FAR e.g. when dog is in a vault */ 145. if(gx == FAR || (gx == omx && gy == omy)){ 146. gx = u.ux; 147. gy = u.uy; 148. } 149. #endif 150. } 151. appr = (udist >= 9) ? 1 : (mtmp->mflee) ? -1 : 0; 152. if(after && udist <= 4 && gx == u.ux && gy == u.uy) 153. return(0); 154. if(udist > 1){ 155. if(!IS_ROOM(levl[u.ux][u.uy].typ) || !rn2(4) || 156. whappr || 157. (mtmp->minvent && rn2((int) edog->apport))) 158. appr = 1; 159. } 160. /* if you have dog food he'll follow you more closely */ 161. if(appr == 0){ 162. obj = invent; 163. while(obj){ 164. if(obj->otyp == TRIPE_RATION){ 165. appr = 1; 166. break; 167. } 168. obj = obj->nobj; 169. } 170. } 171. } else appr = 1; /* gtyp != UNDEF */ 172. if(mtmp->mconf) appr = 0; 173. 174. if(gx == u.ux && gy == u.uy && (dogroom != uroom || dogroom < 0)) { 175. extern coord *gettrack(); 176. register coord *cp; 177. cp = gettrack(omx,omy); 178. if(cp){ 179. gx = cp->x; 180. gy = cp->y; 181. } 182. } 183. 184. nix = omx; 185. niy = omy; 186. cnt = mfndpos(mtmp,poss,info,ALLOW_M | ALLOW_TRAPS); 187. chcnt = 0; 188. chi = -1; 189. for(i=0; i 190. nx = poss[i].x; 191. ny = poss[i].y; 192. #ifdef WALKIES 193. /* if leashed, we drag him along. */ 194. if(dist(nx, ny) > 4 && mtmp->mleashed) continue; 195. #endif 196. if(info[i] & ALLOW_M) { 197. mtmp2 = m_at(nx,ny); 198. if(mtmp2->data->mlevel >= mdat->mlevel+2 || 199. mtmp2->data->mlet == 'c') 200. continue; 201. if(after) return(0); /* hit only once each move */ 202. 203. if(hitmm(mtmp, mtmp2) == 1 && rn2(4) && 204. mtmp2->mlstmv != moves && 205. hitmm(mtmp2,mtmp) == 2) return(2); 206. return(0); 207. } 208. 209. /* dog avoids traps */ 210. /* but perhaps we have to pass a trap in order to follow @ */ 211. if((info[i] & ALLOW_TRAPS) && (trap = t_at(nx,ny))){ 212. if(!trap->tseen && rn2(40)) continue; 213. if(rn2(10)) continue; 214. } 215. 216. /* dog eschewes cursed objects */ 217. /* but likes dog food */ 218. obj = fobj; 219. while(obj){ 220. if(obj->ox != nx || obj->oy != ny) 221. goto nextobj; 222. if(obj->cursed) goto nxti; 223. if(obj->olet == FOOD_SYM && 224. (otyp = dogfood(obj)) < MANFOOD && 225. (otyp < ACCFOOD || edog->hungrytime <= moves)){ 226. /* Note: our dog likes the food so much that he 227. might eat it even when it conceals a cursed object */ 228. nix = nx; 229. niy = ny; 230. chi = i; 231. eatobj: 232. edog->eattime = 233. moves + obj->quan * objects[obj->otyp].oc_delay; 234. if(edog->hungrytime < moves) 235. edog->hungrytime = moves; 236. edog->hungrytime += 237. 5*obj->quan * objects[obj->otyp].nutrition; 238. mtmp->mconf = 0; 239. if(cansee(nix,niy)) 240. pline("%s ate %s.", Monnam(mtmp), doname(obj)); 241. /* perhaps this was a reward */ 242. if(otyp != CADAVER) 243. edog->apport += 200/(edog->dropdist+moves-edog->droptime); 244. delobj(obj); 245. goto newdogpos; 246. } 247. nextobj: 248. obj = obj->nobj; 249. } 250. 251. for(j=0; j 252. if(nx == mtmp->mtrack[j].x && ny == mtmp->mtrack[j].y) 253. if(rn2(4*(cnt-j))) goto nxti; 254. 255. /* Some stupid C compilers cannot compute the whole expression at once. */ 256. nearer = GDIST(nx,ny); 257. nearer -= GDIST(nix,niy); 258. nearer *= appr; 259. if((nearer == 0 && !rn2(++chcnt)) || nearer<0 || 260. (nearer > 0 && !whappr && 261. ((omx == nix && omy == niy && !rn2(3)) 262. || !rn2(12)) 263. )){ 264. nix = nx; 265. niy = ny; 266. if(nearer < 0) chcnt = 0; 267. chi = i; 268. } 269. nxti: ; 270. } 271. newdogpos: 272. if(nix != omx || niy != omy){ 273. if(info[chi] & ALLOW_U){ 274. (void) hitu(mtmp, d(mdat->damn, mdat->damd)+1); 275. return(0); 276. } 277. mtmp->mx = nix; 278. mtmp->my = niy; 279. for(j=MTSZ-1; j>0; j--) mtmp->mtrack[j] = mtmp->mtrack[j-1]; 280. mtmp->mtrack[0].x = omx; 281. mtmp->mtrack[0].y = omy; 282. } 283. #ifdef WALKIES 284. /* an incredible kluge, but the only way to keep pooch near 285. * after he spends time eating or in a trap, etc... 286. */ 287. else if(mtmp->mleashed && dist(omx, omy) > 4) mnexto(mtmp); 288. #endif 289. 290. if(mintrap(mtmp) == 2) { /* he died */ 291. #ifdef WALKIES 292. mtmp->mleashed = 0; 293. #endif 294. return(2); 295. } 296. pmon(mtmp); 297. return(1); 298. }
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