Source:SLASH'EM 0.0.7E7F2/display.c
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Below is the full text to display.c from the source code of SLASH'EM 0.0.7E7F2. To link to a particular line, write [[Source:SLASH'EM 0.0.7E7F2/display.c#line123]], for example.
Source code for vanilla NetHack is at Source code.
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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: @(#)display.c 3.4 2003/02/19 */ 2. /* Copyright (c) Dean Luick, with acknowledgements to Kevin Darcy */ 3. /* and Dave Cohrs, 1990. */ 4. /* NetHack may be freely redistributed. See license for details. */ 5. 6. /* 7. * THE NEW DISPLAY CODE 8. * 9. * The old display code has been broken up into three parts: vision, display, 10. * and drawing. Vision decides what locations can and cannot be physically 11. * seen by the hero. Display decides _what_ is displayed at a given location. 12. * Drawing decides _how_ to draw a monster, fountain, sword, etc. 13. * 14. * The display system uses information from the vision system to decide 15. * what to draw at a given location. The routines for the vision system 16. * can be found in vision.c and vision.h. The routines for display can 17. * be found in this file (display.c) and display.h. The drawing routines 18. * are part of the window port. See doc/window.doc for the drawing 19. * interface. 20. * 21. * The display system deals with an abstraction called a glyph. Anything 22. * that could possibly be displayed has a unique glyph identifier. 23. * 24. * What is seen on the screen is a combination of what the hero remembers 25. * and what the hero currently sees. Objects and dungeon features (walls 26. * doors, etc) are remembered when out of sight. Monsters and temporary 27. * effects are not remembered. Each location on the level has an 28. * associated glyph. This is the hero's _memory_ of what he or she has 29. * seen there before. 30. * 31. * Display rules: 32. * 33. * If the location is in sight, display in order: 34. * visible (or sensed) monsters 35. * visible objects 36. * known traps 37. * background 38. * 39. * If the location is out of sight, display in order: 40. * sensed monsters (telepathy) 41. * memory 42. * 43. * 44. * 45. * Here is a list of the major routines in this file to be used externally: 46. * 47. * newsym 48. * 49. * Possibly update the screen location (x,y). This is the workhorse routine. 50. * It is always correct --- where correct means following the in-sight/out- 51. * of-sight rules. **Most of the code should use this routine.** This 52. * routine updates the map and displays monsters. 53. * 54. * 55. * map_background 56. * map_object 57. * map_trap 58. * map_invisible 59. * unmap_object 60. * 61. * If you absolutely must override the in-sight/out-of-sight rules, there 62. * are two possibilities. First, you can mess with vision to force the 63. * location in sight then use newsym(), or you can use the map_* routines. 64. * The first has not been tried [no need] and the second is used in the 65. * detect routines --- detect object, magic mapping, etc. The map_* 66. * routines *change* what the hero remembers. All changes made by these 67. * routines will be sticky --- they will survive screen redraws. Do *not* 68. * use these for things that only temporarily change the screen. These 69. * routines are also used directly by newsym(). unmap_object is used to 70. * clear a remembered object when/if detection reveals it isn't there. 71. * 72. * 73. * show_glyph 74. * 75. * This is direct (no processing in between) buffered access to the screen. 76. * Temporary screen effects are run through this and its companion, 77. * flush_screen(). There is yet a lower level routine, print_glyph(), 78. * but this is unbuffered and graphic dependent (i.e. it must be surrounded 79. * by graphic set-up and tear-down routines). Do not use print_glyph(). 80. * 81. * 82. * see_monsters 83. * see_objects 84. * see_traps 85. * 86. * These are only used when something affects all of the monsters or 87. * objects or traps. For objects and traps, the only thing is hallucination. 88. * For monsters, there are hallucination and changing from/to blindness, etc. 89. * 90. * 91. * tmp_at 92. * 93. * This is a useful interface for displaying temporary items on the screen. 94. * Its interface is different than previously, so look at it carefully. 95. * 96. * 97. * 98. * Parts of the rm structure that are used: 99. * 100. * typ - What is really there. 101. * glyph - What the hero remembers. This will never be a monster. 102. * Monsters "float" above this. 103. * lit - True if the position is lit. An optimization for 104. * lit/unlit rooms. 105. * waslit - True if the position was *remembered* as lit. 106. * seenv - A vector of bits representing the directions from which the 107. * hero has seen this position. The vector's primary use is 108. * determining how walls are seen. E.g. a wall sometimes looks 109. * like stone on one side, but is seen as a wall from the other. 110. * Other uses are for unmapping detected objects and felt 111. * locations, where we need to know if the hero has ever 112. * seen the location. 113. * flags - Additional information for the typ field. Different for 114. * each typ. 115. * horizontal - Indicates whether the wall or door is horizontal or 116. * vertical. 117. */ 118. #include "hack.h" 119. #include "region.h" 120. 121. STATIC_DCL void FDECL(display_monster,(XCHAR_P,XCHAR_P,struct monst *,int,XCHAR_P)); 122. STATIC_DCL int FDECL(swallow_to_glyph, (int, int)); 123. STATIC_DCL void FDECL(display_warning,(struct monst *)); 124. 125. STATIC_DCL int FDECL(check_pos, (int, int, int)); 126. #ifdef WA_VERBOSE 127. STATIC_DCL boolean FDECL(more_than_one, (int, int, int, int, int)); 128. #endif 129. STATIC_DCL int FDECL(set_twall, (int,int, int,int, int,int, int,int)); 130. STATIC_DCL int FDECL(set_wall, (int, int, int)); 131. STATIC_DCL int FDECL(set_corn, (int,int, int,int, int,int, int,int)); 132. STATIC_DCL int FDECL(set_crosswall, (int, int)); 133. STATIC_DCL void FDECL(set_seenv, (struct rm *, int, int, int, int)); 134. STATIC_DCL void FDECL(t_warn, (struct rm *)); 135. STATIC_DCL int FDECL(wall_angle, (struct rm *)); 136. STATIC_DCL int FDECL(back_to_cmap, (XCHAR_P, XCHAR_P)); 137. 138. STATIC_VAR boolean transp; /* cached transparency flag for current tileset */ 139. 140. #ifdef INVISIBLE_OBJECTS 141. /* 142. * vobj_at() 143. * 144. * Returns a pointer to an object if the hero can see an object at the 145. * given location. This takes care of invisible objects. NOTE, this 146. * assumes that the hero is not blind and on top of the object pile. 147. * It does NOT take into account that the location is out of sight, or, 148. * say, one can see blessed, etc. 149. */ 150. struct obj * 151. vobj_at(x,y) 152. xchar x,y; 153. { 154. register struct obj *obj = level.objects[x][y]; 155. 156. while (obj) { 157. if (!obj->oinvis || See_invisible) return obj; 158. obj = obj->nexthere; 159. } 160. return ((struct obj *) 0); 161. } 162. #endif /* else vobj_at() is defined in display.h */ 163. 164. /* 165. * magic_map_background() 166. * 167. * This function is similar to map_background (see below) except we pay 168. * attention to and correct unexplored, lit ROOM and CORR spots. 169. */ 170. void 171. magic_map_background(x, y, show) 172. xchar x,y; 173. int show; 174. { 175. int cmap = back_to_cmap(x,y); /* assumes hero can see x,y */ 176. struct rm *lev = &levl[x][y]; 177. 178. /* 179. * Correct for out of sight lit corridors and rooms that the hero 180. * doesn't remember as lit. 181. */ 182. if (!cansee(x,y) && !lev->waslit) { 183. /* Floor spaces are dark if unlit. Corridors are dark if unlit. */ 184. if (lev->typ == ROOM && cmap == S_room) 185. cmap = S_stone; 186. else if (lev->typ == CORR && cmap == S_litcorr) 187. cmap = S_corr; 188. } 189. if (level.flags.hero_memory) 190. #ifdef DISPLAY_LAYERS 191. lev->mem_bg = cmap; 192. #else 193. lev->glyph = cmap_to_glyph(cmap); 194. #endif 195. if (show || transp) show_glyph(x,y, cmap_to_glyph(cmap)); 196. } 197. 198. /* 199. * The routines map_background(), map_object(), and map_trap() could just 200. * as easily be: 201. * 202. * map_glyph(x,y,glyph,show) 203. * 204. * Which is called with the xx_to_glyph() in the call. Then I can get 205. * rid of 3 routines that don't do very much anyway. And then stop 206. * having to create fake objects and traps. However, I am reluctant to 207. * make this change. 208. */ 209. /* FIXME: some of these use xchars for x and y, and some use ints. Make 210. * this consistent. 211. */ 212. 213. /* 214. * map_background() 215. * 216. * Make the real background part of our map. This routine assumes that 217. * the hero can physically see the location. Update the screen if directed. 218. */ 219. void 220. map_background(x, y, show) 221. register xchar x,y; 222. register int show; 223. { 224. register int cmap = back_to_cmap(x,y); 225. 226. if (level.flags.hero_memory) 227. #ifdef DISPLAY_LAYERS 228. levl[x][y].mem_bg = cmap; 229. #else 230. levl[x][y].glyph = cmap_to_glyph(cmap); 231. #endif 232. if (show || transp) show_glyph(x,y, cmap_to_glyph(cmap)); 233. } 234. 235. /* 236. * map_trap() 237. * 238. * Map the trap and print it out if directed. This routine assumes that the 239. * hero can physically see the location. 240. */ 241. void 242. map_trap(trap, show) 243. register struct trap *trap; 244. register int show; 245. { 246. register int x = trap->tx, y = trap->ty; 247. register int cmap = trap_to_cmap(trap); 248. 249. if (level.flags.hero_memory) 250. #ifdef DISPLAY_LAYERS 251. levl[x][y].mem_trap = 1 + cmap - MAXDCHARS; 252. #else 253. levl[x][y].glyph = cmap_to_glyph(cmap); 254. #endif 255. if (show || transp) show_glyph(x, y, cmap_to_glyph(cmap)); 256. } 257. 258. /* 259. * map_object() 260. * 261. * Map the given object. This routine assumes that the hero can physically 262. * see the location of the object. Update the screen if directed. 263. */ 264. void 265. map_object(obj, show) 266. register struct obj *obj; 267. register int show; 268. { 269. register int x = obj->ox, y = obj->oy; 270. register int glyph = obj_to_glyph(obj); 271. 272. if (level.flags.hero_memory) 273. #ifdef DISPLAY_LAYERS 274. if ((levl[x][y].mem_corpse = glyph_is_body(glyph))) 275. levl[x][y].mem_obj = 1 + glyph_to_body(glyph); 276. else 277. levl[x][y].mem_obj = 1 + glyph_to_obj(glyph); 278. #else 279. levl[x][y].glyph = glyph; 280. #endif 281. if (show) show_glyph(x, y, glyph); 282. } 283. 284. /* 285. * map_invisible() 286. * 287. * Make the hero remember that a square contains an invisible monster. 288. * This is a special case in that the square will continue to be displayed 289. * this way even when the hero is close enough to see it. To get rid of 290. * this and display the square's actual contents, use unmap_object() followed 291. * by newsym() if necessary. 292. */ 293. void 294. map_invisible(x, y) 295. register xchar x, y; 296. { 297. if (x != u.ux || y != u.uy) { /* don't display I at hero's location */ 298. if (level.flags.hero_memory) 299. #ifdef DISPLAY_LAYERS 300. levl[x][y].mem_invis = 1; 301. #else 302. levl[x][y].glyph = GLYPH_INVISIBLE; 303. #endif 304. show_glyph(x, y, GLYPH_INVISIBLE); 305. } 306. } 307. 308. /* 309. * unmap_object() 310. * 311. * Remove something from the map when the hero realizes it's not there any 312. * more. Replace it with background or known trap, but not with any other 313. * If this is used for detection, a full screen update is imminent anyway; 314. * if this is used to get rid of an invisible monster notation, we might have 315. * to call newsym(). 316. */ 317. void 318. unmap_object(x, y) 319. register int x, y; 320. { 321. #ifndef DISPLAY_LAYERS 322. register struct trap *trap; 323. #endif 324. 325. if (!level.flags.hero_memory) return; 326. 327. #ifdef DISPLAY_LAYERS 328. levl[x][y].mem_invis = levl[x][y].mem_corpse = levl[x][y].mem_obj = 0; 329. #else 330. if ((trap = t_at(x,y)) != 0 && trap->tseen && !covers_traps(x,y)) 331. map_trap(trap, 0); 332. else if (levl[x][y].seenv) { 333. struct rm *lev = &levl[x][y]; 334. 335. map_background(x, y, 0); 336. 337. /* turn remembered dark room squares dark */ 338. if (!lev->waslit && lev->glyph == cmap_to_glyph(S_room) && 339. lev->typ == ROOM) 340. lev->glyph = cmap_to_glyph(S_stone); 341. } else 342. levl[x][y].glyph = cmap_to_glyph(S_stone); /* default val */ 343. #endif 344. } 345. 346. #define DETECTED 2 347. #define PHYSICALLY_SEEN 1 348. #define is_worm_tail(mon) ((mon) && ((x != (mon)->mx) || (y != (mon)->my))) 349. 350. /* 351. * map_location() 352. * 353. * Make whatever at this location show up. This is only for non-living 354. * things. This will not handle feeling invisible objects correctly. 355. * 356. * Internal to display.c, this is a #define for speed. 357. */ 358. #ifdef DISPLAY_LAYERS 359. #define _map_location(x,y,show) \ 360. { \ 361. register struct obj *obj; \ 362. register struct trap *trap; \ 363. \ 364. if (level.flags.hero_memory) { \ 365. if ((obj = vobj_at(x, y)) && !covers_objects(x, y)) \ 366. map_object(obj, FALSE); \ 367. else \ 368. levl[x][y].mem_corpse = levl[x][y].mem_obj = 0; \ 369. if ((trap = t_at(x, y)) && trap->tseen && !covers_traps(x, y)) \ 370. map_trap(trap, FALSE); \ 371. else \ 372. levl[x][y].mem_trap = 0; \ 373. map_background(x, y, FALSE); \ 374. if (show) show_glyph(x, y, memory_glyph(x, y)); \ 375. } else if ((obj = vobj_at(x,y)) && !covers_objects(x,y)) \ 376. map_object(obj,show); \ 377. else if ((trap = t_at(x,y)) && trap->tseen && !covers_traps(x,y)) \ 378. map_trap(trap,show); \ 379. else \ 380. map_background(x,y,show); \ 381. } 382. #else /* DISPLAY_LAYERS */ 383. #define _map_location(x,y,show) \ 384. { \ 385. register struct obj *obj; \ 386. register struct trap *trap; \ 387. \ 388. if ((obj = vobj_at(x,y)) && !covers_objects(x,y)) \ 389. map_object(obj,show); \ 390. else if ((trap = t_at(x,y)) && trap->tseen && !covers_traps(x,y)) \ 391. map_trap(trap,show); \ 392. else \ 393. map_background(x,y,show); \ 394. } 395. #endif /* DISPLAY_LAYERS */ 396. 397. void 398. map_location(x,y,show) 399. int x, y, show; 400. { 401. _map_location(x,y,show); 402. } 403. 404. int memory_glyph(x, y) 405. int x, y; 406. { 407. #ifdef DISPLAY_LAYERS 408. if (levl[x][y].mem_invis) 409. return GLYPH_INVISIBLE; 410. else if (levl[x][y].mem_obj) 411. if (levl[x][y].mem_corpse) 412. return body_to_glyph(levl[x][y].mem_obj - 1); 413. else 414. return objnum_to_glyph(levl[x][y].mem_obj - 1); 415. else if (levl[x][y].mem_trap) 416. return cmap_to_glyph(levl[x][y].mem_trap - 1 + MAXDCHARS); 417. else 418. return cmap_to_glyph(levl[x][y].mem_bg); 419. #else 420. return levl[x][y].glyph; 421. #endif 422. } 423. 424. void clear_memory_glyph(x, y, to) 425. int x, y, to; 426. { 427. #ifdef DISPLAY_LAYERS 428. levl[x][y].mem_bg = to; 429. levl[x][y].mem_trap = 0; 430. levl[x][y].mem_obj = 0; 431. levl[x][y].mem_corpse = 0; 432. levl[x][y].mem_invis = 0; 433. #else 434. levl[x][y].glyph = cmap_to_glyph(to); 435. #endif 436. } 437. 438. /* 439. * display_monster() 440. * 441. * Note that this is *not* a map_XXXX() function! Monsters sort of float 442. * above everything. 443. * 444. * Yuck. Display body parts by recognizing that the display position is 445. * not the same as the monster position. Currently the only body part is 446. * a worm tail. 447. * 448. */ 449. STATIC_OVL void 450. display_monster(x, y, mon, sightflags, worm_tail) 451. register xchar x, y; /* display position */ 452. register struct monst *mon; /* monster to display */ 453. int sightflags; /* 1 if the monster is physically seen */ 454. /* 2 if detected using Detect_monsters */ 455. register xchar worm_tail; /* mon is actually a worm tail */ 456. { 457. register boolean mon_mimic = (mon->m_ap_type != M_AP_NOTHING); 458. register int sensed = mon_mimic && 459. (Protection_from_shape_changers || sensemon(mon)); 460. /* 461. * We must do the mimic check first. If the mimic is mimicing something, 462. * and the location is in sight, we have to change the hero's memory 463. * so that when the position is out of sight, the hero remembers what 464. * the mimic was mimicing. 465. */ 466. 467. if (mon_mimic && (sightflags == PHYSICALLY_SEEN)) { 468. switch (mon->m_ap_type) { 469. default: 470. impossible("display_monster: bad m_ap_type value [ = %d ]", 471. (int) mon->m_ap_type); 472. case M_AP_NOTHING: 473. show_glyph(x, y, mon_to_glyph(mon)); 474. break; 475. 476. case M_AP_FURNITURE: { 477. /* 478. * This is a poor man's version of map_background(). I can't 479. * use map_background() because we are overriding what is in 480. * the 'typ' field. Maybe have map_background()'s parameters 481. * be (x,y,glyph) instead of just (x,y). 482. * 483. * mappearance is currently set to an S_ index value in 484. * makemon.c. 485. */ 486. register int glyph = cmap_to_glyph(mon->mappearance); 487. #ifdef DISPLAY_LAYERS 488. levl[x][y].mem_bg = mon->mappearance; 489. #else 490. levl[x][y].glyph = glyph; 491. #endif 492. if (!sensed) show_glyph(x,y, glyph); 493. break; 494. } 495. 496. case M_AP_OBJECT: { 497. struct obj obj; /* Make a fake object to send */ 498. /* to map_object(). */ 499. obj.ox = x; 500. obj.oy = y; 501. obj.otyp = mon->mappearance; 502. obj.corpsenm = PM_TENGU; /* if mimicing a corpse */ 503. map_object(&obj,!sensed); 504. break; 505. } 506. 507. case M_AP_MONSTER: 508. show_glyph(x,y, monnum_to_glyph(what_mon((int)mon->mappearance))); 509. break; 510. } 511. 512. } 513. 514. /* If the mimic is unsucessfully mimicing something, display the monster */ 515. if (!mon_mimic || sensed) { 516. int num; 517. 518. /* [ALI] Only use detected glyphs when monster wouldn't be 519. * visible by any other means. 520. */ 521. if (sightflags == DETECTED) { 522. if (worm_tail) 523. num = detected_monnum_to_glyph(what_mon(PM_LONG_WORM_TAIL)); 524. else 525. num = detected_mon_to_glyph(mon); 526. } else if (mon->mtame && !Hallucination) { 527. if (worm_tail) 528. num = petnum_to_glyph(PM_LONG_WORM_TAIL); 529. else 530. num = pet_to_glyph(mon); 531. } else { 532. if (worm_tail) 533. num = monnum_to_glyph(what_mon(PM_LONG_WORM_TAIL)); 534. else 535. num = mon_to_glyph(mon); 536. } 537. show_glyph(x,y,num); 538. } 539. } 540. /* 541. * display_warning() 542. * 543. * This is also *not* a map_XXXX() function! Monster warnings float 544. * above everything just like monsters do, but only if the monster 545. * is not showing. 546. * 547. * Do not call for worm tails. 548. */ 549. STATIC_OVL void 550. display_warning(mon) 551. register struct monst *mon; 552. { 553. int x = mon->mx, y = mon->my; 554. int wl = (int) (mon->m_lev / 4); 555. int glyph; 556. 557. if (mon_warning(mon)) { 558. if (wl > WARNCOUNT - 1) wl = WARNCOUNT - 1; 559. /* 3.4.1: this really ought to be rn2(WARNCOUNT), but value "0" 560. isn't handled correctly by the what_is routine so avoid it */ 561. if (Hallucination) wl = rn1(WARNCOUNT-1,1); 562. glyph = warning_to_glyph(wl); 563. } else if (MATCH_WARN_OF_MON(mon)) { 564. glyph = mon_to_glyph(mon); 565. } else { 566. impossible("display_warning did not match warning type?"); 567. return; 568. } 569. show_glyph(x, y, glyph); 570. } 571. 572. /* 573. * feel_location() 574. * 575. * Feel the given location. This assumes that the hero is blind and that 576. * the given position is either the hero's or one of the eight squares 577. * adjacent to the hero (except for a boulder push). 578. */ 579. void 580. feel_location(x, y) 581. xchar x, y; 582. { 583. struct rm *lev = &(levl[x][y]); 584. struct obj *boulder; 585. register struct monst *mon; 586. 587. /* If the hero's memory of an invisible monster is accurate, we want to keep 588. * him from detecting the same monster over and over again on each turn. 589. * We must return (so we don't erase the monster). (We must also, in the 590. * search function, be sure to skip over previously detected 'I's.) 591. */ 592. if (memory_is_invisible(x,y) && m_at(x,y)) return; 593. 594. /* The hero can't feel non pool locations while under water. */ 595. if (Underwater && !Is_waterlevel(&u.uz) && ! is_pool(x,y)) 596. return; 597. 598. /* Set the seen vector as if the hero had seen it. It doesn't matter */ 599. /* if the hero is levitating or not. */ 600. set_seenv(lev, u.ux, u.uy, x, y); 601. 602. if (Levitation && !Is_airlevel(&u.uz) && !Is_waterlevel(&u.uz)) { 603. /* 604. * Levitation Rules. It is assumed that the hero can feel the state 605. * of the walls around herself and can tell if she is in a corridor, 606. * room, or doorway. Boulders are felt because they are large enough. 607. * Anything else is unknown because the hero can't reach the ground. 608. * This makes things difficult. 609. * 610. * Check (and display) in order: 611. * 612. * + Stone, walls, and closed doors. 613. * + Boulders. [see a boulder before a doorway] 614. * + Doors. 615. * + Room/water positions 616. * + Everything else (hallways!) 617. */ 618. if (IS_ROCK(lev->typ) || (IS_DOOR(lev->typ) && 619. (lev->doormask & (D_LOCKED | D_CLOSED)))) { 620. map_background(x, y, 1); 621. } else if ((boulder = sobj_at(BOULDER,x,y)) != 0) { 622. map_object(boulder, 1); 623. } else if (IS_DOOR(lev->typ)) { 624. map_background(x, y, 1); 625. } else if (IS_ROOM(lev->typ) || IS_POOL(lev->typ)) { 626. /* 627. * An open room or water location. Normally we wouldn't touch 628. * this, but we have to get rid of remembered boulder symbols. 629. * This will only occur in rare occations when the hero goes 630. * blind and doesn't find a boulder where expected (something 631. * came along and picked it up). We know that there is not a 632. * boulder at this location. Show fountains, pools, etc. 633. * underneath if already seen. Otherwise, show the appropriate 634. * floor symbol. 635. * 636. * Similarly, if the hero digs a hole in a wall or feels a location 637. * that used to contain an unseen monster. In these cases, 638. * there's no reason to assume anything was underneath, so 639. * just show the appropriate floor symbol. If something was 640. * embedded in the wall, the glyph will probably already 641. * reflect that. Don't change the symbol in this case. 642. * 643. * This isn't quite correct. If the boulder was on top of some 644. * other objects they should be seen once the boulder is removed. 645. * However, we have no way of knowing that what is there now 646. * was there then. So we let the hero have a lapse of memory. 647. * We could also just display what is currently on the top of the 648. * object stack (if anything). 649. */ 650. if (remembered_object(x, y) == BOULDER) { 651. if (lev->typ != ROOM && lev->seenv) { 652. map_background(x, y, 1); 653. } else { 654. #ifdef DISPLAY_LAYERS 655. lev->mem_bg = lev->waslit ? S_room : S_stone; 656. #else 657. lev->glyph = lev->waslit ? cmap_to_glyph(S_room) : 658. cmap_to_glyph(S_stone); 659. #endif 660. show_glyph(x, y, memory_glyph(x, y)); 661. } 662. #ifdef DISPLAY_LAYERS 663. } else if ((lev->mem_bg >= S_stone && lev->mem_bg < S_room) || 664. memory_is_invisible(x, y)) { 665. lev->mem_bg = lev->waslit ? S_room : S_stone; 666. #else 667. } else if ((lev->glyph >= cmap_to_glyph(S_stone) && 668. lev->glyph < cmap_to_glyph(S_room)) || 669. glyph_is_invisible(levl[x][y].glyph)) { 670. lev->glyph = lev->waslit ? cmap_to_glyph(S_room) : 671. cmap_to_glyph(S_stone); 672. #endif 673. show_glyph(x, y, memory_glyph(x, y)); 674. } 675. } else { 676. /* We feel it (I think hallways are the only things left). */ 677. map_background(x, y, 1); 678. /* Corridors are never felt as lit (unless remembered that way) */ 679. /* (lit_corridor only). */ 680. #ifdef DISPLAY_LAYERS 681. if (lev->typ == CORR && lev->mem_bg == S_litcorr && !lev->waslit) 682. show_glyph(x, y, cmap_to_glyph(lev->mem_bg = S_corr)); 683. #else 684. if (lev->typ == CORR && 685. lev->glyph == cmap_to_glyph(S_litcorr) && !lev->waslit) 686. show_glyph(x, y, lev->glyph = cmap_to_glyph(S_corr)); 687. #endif 688. } 689. } else { 690. _map_location(x, y, 1); 691. 692. if (Punished) { 693. /* 694. * A ball or chain is only felt if it is first on the object 695. * location list. Otherwise, we need to clear the felt bit --- 696. * something has been dropped on the ball/chain. If the bit is 697. * not cleared, then when the ball/chain is moved it will drop 698. * the wrong glyph. 699. */ 700. if (uchain->ox == x && uchain->oy == y) { 701. if (level.objects[x][y] == uchain) 702. u.bc_felt |= BC_CHAIN; 703. else 704. u.bc_felt &= ~BC_CHAIN; /* do not feel the chain */ 705. } 706. if (!carried(uball) && uball->ox == x && uball->oy == y) { 707. if (level.objects[x][y] == uball) 708. u.bc_felt |= BC_BALL; 709. else 710. u.bc_felt &= ~BC_BALL; /* do not feel the ball */ 711. } 712. } 713. 714. /* Floor spaces are dark if unlit. Corridors are dark if unlit. */ 715. #ifdef DISPLAY_LAYERS 716. if (lev->typ == ROOM && lev->mem_bg == S_room && !lev->waslit) { 717. lev->mem_bg = S_stone; 718. show_glyph(x,y, memory_glyph(x, y)); 719. } else if (lev->typ == CORR && 720. lev->mem_bg == S_litcorr && !lev->waslit) { 721. lev->mem_bg = S_corr; 722. show_glyph(x,y, memory_glyph(x, y)); 723. } 724. #else 725. if (lev->typ == ROOM && 726. lev->glyph == cmap_to_glyph(S_room) && !lev->waslit) 727. show_glyph(x,y, lev->glyph = cmap_to_glyph(S_stone)); 728. else if (lev->typ == CORR && 729. lev->glyph == cmap_to_glyph(S_litcorr) && !lev->waslit) 730. show_glyph(x,y, lev->glyph = cmap_to_glyph(S_corr)); 731. #endif 732. } 733. /* draw monster on top if we can sense it */ 734. if ((x != u.ux || y != u.uy) && (mon = m_at(x,y)) && sensemon(mon)) 735. display_monster(x, y, mon, 736. (tp_sensemon(mon) || MATCH_WARN_OF_MON(mon)) ? PHYSICALLY_SEEN : DETECTED, 737. is_worm_tail(mon)); 738. } 739. 740. /* 741. * newsym() 742. * 743. * Possibly put a new glyph at the given location. 744. */ 745. void 746. newsym(x,y) 747. register int x,y; 748. { 749. register struct monst *mon; 750. register struct rm *lev = &(levl[x][y]); 751. register int see_it; 752. register xchar worm_tail; 753. 754. if (in_mklev) return; 755. 756. /* only permit updating the hero when swallowed */ 757. if (u.uswallow) { 758. if (x == u.ux && y == u.uy) display_self(); 759. return; 760. } 761. if (Underwater && !Is_waterlevel(&u.uz)) { 762. /* don't do anything unless (x,y) is an adjacent underwater position */ 763. int dx, dy; 764. if (!is_pool(x,y)) return; 765. dx = x - u.ux; if (dx < 0) dx = -dx; 766. dy = y - u.uy; if (dy < 0) dy = -dy; 767. if (dx > 1 || dy > 1) return; 768. } 769. 770. /* Can physically see the location. */ 771. if (cansee(x,y)) { 772. NhRegion* reg = visible_region_at(x,y); 773. /* 774. * Don't use templit here: E.g. 775. * 776. * lev->waslit = !!(lev->lit || templit(x,y)); 777. * 778. * Otherwise we have the "light pool" problem, where non-permanently 779. * lit areas just out of sight stay remembered as lit. They should 780. * re-darken. 781. * 782. * Perhaps ALL areas should revert to their "unlit" look when 783. * out of sight. 784. */ 785. lev->waslit = (lev->lit!=0); /* remember lit condition */ 786. 787. if (reg != NULL && ACCESSIBLE(lev->typ)) { 788. show_region(reg,x,y); 789. return; 790. } 791. if (x == u.ux && y == u.uy) { 792. if (senseself()) { 793. _map_location(x,y,0); /* map *under* self */ 794. display_self(); 795. } else 796. /* we can see what is there */ 797. _map_location(x,y,1); 798. } 799. else { 800. mon = m_at(x,y); 801. worm_tail = is_worm_tail(mon); 802. see_it = mon && (worm_tail 803. ? (!mon->minvis || See_invisible) 804. : (mon_visible(mon)) || tp_sensemon(mon) || MATCH_WARN_OF_MON(mon)); 805. if (mon && (see_it || (!worm_tail && Detect_monsters))) { 806. if (mon->mtrapped) { 807. struct trap *trap = t_at(x, y); 808. int tt = trap ? trap->ttyp : NO_TRAP; 809. 810. /* if monster is in a physical trap, you see the trap too */ 811. if (tt == BEAR_TRAP || tt == PIT || 812. tt == SPIKED_PIT ||tt == WEB) { 813. trap->tseen = TRUE; 814. } 815. } 816. _map_location(x,y,0); /* map under the monster */ 817. /* also gets rid of any invisibility glyph */ 818. display_monster(x, y, mon, see_it? PHYSICALLY_SEEN : DETECTED, worm_tail); 819. } 820. else if (mon && mon_warning(mon) && !is_worm_tail(mon)) 821. display_warning(mon); 822. else if (memory_is_invisible(x,y)) 823. map_invisible(x, y); 824. else 825. _map_location(x,y,1); /* map the location */ 826. } 827. } 828. 829. /* Can't see the location. */ 830. else { 831. if (x == u.ux && y == u.uy) { 832. feel_location(u.ux, u.uy); /* forces an update */ 833. 834. if (senseself()) display_self(); 835. } 836. else if ((mon = m_at(x,y)) 837. && ((see_it = (tp_sensemon(mon) || MATCH_WARN_OF_MON(mon) 838. || (see_with_infrared(mon) && mon_visible(mon)))) 839. || Detect_monsters) 840. && !is_worm_tail(mon)) { 841. /* Monsters are printed every time. */ 842. /* This also gets rid of any invisibility glyph */ 843. display_monster(x, y, mon, see_it ? 0 : DETECTED, 0); 844. } 845. else if ((mon = m_at(x,y)) && mon_warning(mon) && 846. !is_worm_tail(mon)) { 847. display_warning(mon); 848. } 849. 850. /* 851. * If the location is remembered as being both dark (waslit is false) 852. * and lit (glyph is a lit room or lit corridor) then it was either: 853. * 854. * (1) A dark location that the hero could see through night 855. * vision. 856. * 857. * (2) Darkened while out of the hero's sight. This can happen 858. * when cursed scroll of light is read. 859. * 860. * In either case, we have to manually correct the hero's memory to 861. * match waslit. Deciding when to change waslit is non-trivial. 862. * 863. * Note: If flags.lit_corridor is set, then corridors act like room 864. * squares. That is, they light up if in night vision range. 865. * If flags.lit_corridor is not set, then corridors will 866. * remain dark unless lit by a light spell and may darken 867. * again, as discussed above. 868. * 869. * These checks and changes must be here and not in back_to_glyph(). 870. * They are dependent on the position being out of sight. 871. */ 872. else if (!lev->waslit) { 873. #ifdef DISPLAY_LAYERS 874. if (lev->mem_bg == S_litcorr && lev->typ == CORR) { 875. lev->mem_bg = S_corr; 876. show_glyph(x, y, memory_glyph(x, y)); 877. } else if (lev->mem_bg == S_room && lev->typ == ROOM) { 878. lev->mem_bg = S_stone; 879. show_glyph(x, y, memory_glyph(x, y)); 880. } 881. #else /* DISPLAY_LAYERS */ 882. if (lev->glyph == cmap_to_glyph(S_litcorr) && lev->typ == CORR) 883. show_glyph(x, y, lev->glyph = cmap_to_glyph(S_corr)); 884. else if (lev->glyph == cmap_to_glyph(S_room) && lev->typ == ROOM) 885. show_glyph(x, y, lev->glyph = cmap_to_glyph(S_stone)); 886. #endif /* DISPLAY_LAYERS */ 887. else 888. goto show_mem; 889. } else { 890. show_mem: 891. show_glyph(x, y, memory_glyph(x, y)); 892. } 893. } 894. } 895. 896. #undef is_worm_tail 897. 898. /* 899. * shieldeff() 900. * 901. * Put magic shield pyrotechnics at the given location. This *could* be 902. * pulled into a platform dependent routine for fancier graphics if desired. 903. */ 904. void 905. shieldeff(x,y) 906. xchar x,y; 907. { 908. register int i; 909. 910. if (!flags.sparkle) return; 911. if (cansee(x,y)) { /* Don't see anything if can't see the location */ 912. #ifdef ALLEG_FX 913. if (iflags.usealleg) { 914. newsym(x,y); 915. if(alleg_shield(x,y)) 916. return; 917. } 918. #endif 919. for (i = 0; i < SHIELD_COUNT; i++) { 920. show_glyph(x, y, cmap_to_glyph(shield_static[i])); 921. flush_screen(1); /* make sure the glyph shows up */ 922. delay_output(); 923. } 924. newsym(x,y); /* restore the old information */ 925. } 926. } 927. 928. 929. /* 930. * tmp_at() 931. * 932. * Temporarily place glyphs on the screen. Do not call delay_output(). It 933. * is up to the caller to decide if it wants to wait [presently, everyone 934. * but explode() wants to delay]. 935. * 936. * Call: 937. * (DISP_BEAM, glyph) open, initialize glyph 938. * (DISP_BEAM_ALWAYS, glyph) open, initialize glyph 939. * (DISP_FLASH, glyph) open, initialize glyph 940. * (DISP_ALWAYS, glyph) open, initialize glyph 941. * (DISP_CHANGE, glyph) change glyph 942. * (DISP_END, 0) close & clean up (second argument doesn't 943. * matter) 944. * (DISP_FREEMEM, 0) only used to prevent memory leak during 945. * exit) 946. * (x, y) display the glyph at the location 947. * 948. * DISP_BEAM - Display the given glyph at each location, but do not erase 949. * any until the close call. 950. * WAC added beam_always for lightning strikes 951. * DISP_BEAM_ALWAYS- Like DISP_BEAM, but vision is not taken into account. 952. * DISP_FLASH - Display the given glyph at each location, but erase the 953. * previous location's glyph. 954. * DISP_ALWAYS- Like DISP_FLASH, but vision is not taken into account. 955. */ 956. 957. static struct tmp_glyph { 958. coord saved[COLNO]; /* previously updated positions */ 959. int sidx; /* index of next unused slot in saved[] */ 960. int style; /* either DISP_BEAM or DISP_FLASH or DISP_ALWAYS */ 961. int glyph; /* glyph to use when printing */ 962. struct tmp_glyph *cont; /* Used if saved[] is full */ 963. struct tmp_glyph *prev; 964. } tgfirst; 965. static struct tmp_glyph *tglyph = (struct tmp_glyph *)0; 966. 967. void 968. tmp_at(x, y) 969. int x, y; 970. { 971. struct tmp_glyph *tmp, *cont; 972. 973. switch (x) { 974. case DISP_BEAM: 975. case DISP_BEAM_ALWAYS: 976. case DISP_FLASH: 977. case DISP_ALWAYS: 978. if (!tglyph) 979. tmp = &tgfirst; 980. else /* nested effect; we need dynamic memory */ 981. tmp = (struct tmp_glyph *)alloc(sizeof (struct tmp_glyph)); 982. tmp->prev = tglyph; 983. tglyph = tmp; 984. tglyph->sidx = 0; 985. tglyph->style = x; 986. tglyph->glyph = y; 987. tglyph->cont = (struct tmp_glyph *)0; 988. flush_screen(0); /* flush buffered glyphs */ 989. return; 990. case DISP_FREEMEM: /* in case game ends with tmp_at() in progress */ 991. while (tglyph) { 992. cont = tglyph->cont; 993. while (cont) { 994. tmp = cont->cont; 995. if (cont != &tgfirst) free((genericptr_t)cont); 996. cont = tmp; 997. } 998. tmp = tglyph->prev; 999. if (tglyph != &tgfirst) free((genericptr_t)tglyph); 1000. tglyph = tmp; 1001. } 1002. return; 1003. 1004. default: 1005. break; 1006. } 1007. 1008. if (!tglyph) panic("tmp_at: tglyph not initialized"); 1009. 1010. switch (x) { 1011. case DISP_CHANGE: 1012. tglyph->glyph = y; 1013. break; 1014. 1015. case DISP_END: 1016. if (tglyph->style == DISP_BEAM || tglyph->style == DISP_BEAM_ALWAYS) { 1017. register int i; 1018. 1019. /* Erase (reset) from source to end */ 1020. for (i = 0; i < tglyph->sidx; i++) 1021. newsym(tglyph->saved[i].x, tglyph->saved[i].y); 1022. cont = tglyph->cont; 1023. while (cont) { 1024. for (i = 0; i < cont->sidx; i++) 1025. newsym(cont->saved[i].x, cont->saved[i].y); 1026. tmp = cont->cont; 1027. if (cont != &tgfirst) free((genericptr_t)cont); 1028. cont = tmp; 1029. } 1030. /* tglyph->cont = (struct tmp_glyph *)0; */ 1031. } else { /* DISP_FLASH or DISP_ALWAYS */ 1032. if (tglyph->sidx) /* been called at least once */ 1033. newsym(tglyph->saved[0].x, tglyph->saved[0].y); 1034. } 1035. /* tglyph->sidx = 0; -- about to be freed, so not necessary */ 1036. tmp = tglyph->prev; 1037. if (tglyph != &tgfirst) free((genericptr_t)tglyph); 1038. tglyph = tmp; 1039. break; 1040. 1041. default: /* do it */ 1042. if (tglyph->style == DISP_BEAM || tglyph->style == DISP_BEAM_ALWAYS) { 1043. if (!cansee(x,y) && tglyph->style == DISP_BEAM) break; 1044. /* save pos for later erasing */ 1045. if (tglyph->sidx >= SIZE(tglyph->saved)) { 1046. tmp = (struct tmp_glyph *)alloc(sizeof (struct tmp_glyph)); 1047. *tmp = *tglyph; 1048. tglyph->prev = (struct tmp_glyph *)0; 1049. tmp->cont = tglyph; 1050. tglyph = tmp; 1051. tglyph->sidx = 0; 1052. } 1053. tglyph->saved[tglyph->sidx].x = x; 1054. tglyph->saved[tglyph->sidx].y = y; 1055. tglyph->sidx += 1; 1056. } else { /* DISP_FLASH/ALWAYS */ 1057. if (tglyph->sidx) { /* not first call, so reset previous pos */ 1058. newsym(tglyph->saved[0].x, tglyph->saved[0].y); 1059. tglyph->sidx = 0; /* display is presently up to date */ 1060. } 1061. if (!cansee(x,y) && tglyph->style != DISP_ALWAYS) break; 1062. tglyph->saved[0].x = x; 1063. tglyph->saved[0].y = y; 1064. tglyph->sidx = 1; 1065. } 1066. 1067. show_glyph(x, y, tglyph->glyph); /* show it */ 1068. flush_screen(0); /* make sure it shows up */ 1069. break; 1070. } /* end case */ 1071. } 1072. 1073. #ifdef DISPLAY_LAYERS 1074. int 1075. glyph_is_floating(glyph) 1076. int glyph; 1077. { 1078. return glyph_is_monster(glyph) || glyph_is_explosion(glyph) || 1079. glyph_is_zap_beam(glyph) || glyph_is_swallow(glyph) || 1080. glyph_is_warning(glyph) || tglyph && glyph == tglyph->glyph; 1081. } 1082. #endif 1083. 1084. /* 1085. * swallowed() 1086. * 1087. * The hero is swallowed. Show a special graphics sequence for this. This 1088. * bypasses all of the display routines and messes with buffered screen 1089. * directly. This method works because both vision and display check for 1090. * being swallowed. 1091. */ 1092. void 1093. swallowed(first) 1094. int first; 1095. { 1096. static xchar lastx, lasty; /* last swallowed position */ 1097. int swallower, left_ok, rght_ok; 1098. 1099. if (first) 1100. cls(); 1101. else { 1102. register int x, y; 1103. 1104. /* Clear old location */ 1105. for (y = lasty-1; y <= lasty+1; y++) 1106. for (x = lastx-1; x <= lastx+1; x++) 1107. if (isok(x,y)) show_glyph(x,y,cmap_to_glyph(S_stone)); 1108. } 1109. 1110. #ifdef ALLEG_FX 1111. if(!iflags.usealleg || !alleg_swallowed(u.ux,u.uy)) { 1112. #endif 1113. swallower = monsndx(u.ustuck->data); 1114. /* assume isok(u.ux,u.uy) */ 1115. left_ok = isok(u.ux-1,u.uy); 1116. rght_ok = isok(u.ux+1,u.uy); 1117. /* 1118. * Display the hero surrounded by the monster's stomach. 1119. */ 1120. if(isok(u.ux, u.uy-1)) { 1121. if (left_ok) 1122. show_glyph(u.ux-1, u.uy-1, swallow_to_glyph(swallower, S_sw_tl)); 1123. show_glyph(u.ux , u.uy-1, swallow_to_glyph(swallower, S_sw_tc)); 1124. if (rght_ok) 1125. show_glyph(u.ux+1, u.uy-1, swallow_to_glyph(swallower, S_sw_tr)); 1126. } 1127. 1128. if (left_ok) 1129. show_glyph(u.ux-1, u.uy , swallow_to_glyph(swallower, S_sw_ml)); 1130. display_self(); 1131. if (rght_ok) 1132. show_glyph(u.ux+1, u.uy , swallow_to_glyph(swallower, S_sw_mr)); 1133. 1134. if(isok(u.ux, u.uy+1)) { 1135. if (left_ok) 1136. show_glyph(u.ux-1, u.uy+1, swallow_to_glyph(swallower, S_sw_bl)); 1137. show_glyph(u.ux , u.uy+1, swallow_to_glyph(swallower, S_sw_bc)); 1138. if (rght_ok) 1139. show_glyph(u.ux+1, u.uy+1, swallow_to_glyph(swallower, S_sw_br)); 1140. } 1141. #ifdef ALLEG_FX 1142. } 1143. #endif 1144. 1145. /* Update the swallowed position. */ 1146. lastx = u.ux; 1147. lasty = u.uy; 1148. } 1149. 1150. /* 1151. * under_water() 1152. * 1153. * Similar to swallowed() in operation. Shows hero when underwater 1154. * except when in water level. Special routines exist for that. 1155. */ 1156. void 1157. under_water(mode) 1158. int mode; 1159. { 1160. static xchar lastx, lasty; 1161. static boolean dela; 1162. register int x, y; 1163. 1164. /* swallowing has a higher precedence than under water */ 1165. if (Is_waterlevel(&u.uz) || u.uswallow) return; 1166. 1167. /* full update */ 1168. if (mode == 1 || dela) { 1169. cls(); 1170. dela = FALSE; 1171. } 1172. /* delayed full update */ 1173. else if (mode == 2) { 1174. dela = TRUE; 1175. return; 1176. } 1177. /* limited update */ 1178. else { 1179. for (y = lasty-1; y <= lasty+1; y++) 1180. for (x = lastx-1; x <= lastx+1; x++) 1181. if (isok(x,y)) 1182. show_glyph(x,y,cmap_to_glyph(S_stone)); 1183. } 1184. for (x = u.ux-1; x <= u.ux+1; x++) 1185. for (y = u.uy-1; y <= u.uy+1; y++) 1186. if (isok(x,y) && is_pool(x,y)) { 1187. if (Blind && !(x == u.ux && y == u.uy)) 1188. show_glyph(x,y,cmap_to_glyph(S_stone)); 1189. else 1190. newsym(x,y); 1191. } 1192. lastx = u.ux; 1193. lasty = u.uy; 1194. } 1195. 1196. /* 1197. * under_ground() 1198. * 1199. * Very restricted display. You can only see yourself. 1200. */ 1201. void 1202. under_ground(mode) 1203. int mode; 1204. { 1205. static boolean dela; 1206. 1207. /* swallowing has a higher precedence than under ground */ 1208. if (u.uswallow) return; 1209. 1210. /* full update */ 1211. if (mode == 1 || dela) { 1212. cls(); 1213. dela = FALSE; 1214. } 1215. /* delayed full update */ 1216. else if (mode == 2) { 1217. dela = TRUE; 1218. return; 1219. } 1220. /* limited update */ 1221. else 1222. newsym(u.ux,u.uy); 1223. } 1224. 1225. 1226. /* ========================================================================= */ 1227. 1228. /* 1229. * Loop through all of the monsters and update them. Called when: 1230. * + going blind & telepathic 1231. * + regaining sight & telepathic 1232. * + getting and losing infravision 1233. * + hallucinating 1234. * + doing a full screen redraw 1235. * + see invisible times out or a ring of see invisible is taken off 1236. * + when a potion of see invisible is quaffed or a ring of see 1237. * invisible is put on 1238. * + gaining telepathy when blind [givit() in eat.c, pleased() in pray.c] 1239. * + losing telepathy while blind [xkilled() in mon.c, attrcurse() in 1240. * sit.c] 1241. */ 1242. void 1243. see_monsters() 1244. { 1245. register struct monst *mon; 1246. 1247. if (defer_see_monsters) return; 1248. 1249. for (mon = fmon; mon; mon = mon->nmon) { 1250. if (DEADMONSTER(mon)) continue; 1251. newsym(mon->mx,mon->my); 1252. if (mon->wormno) see_wsegs(mon); 1253. } 1254. #ifdef STEED 1255. /* when mounted, hero's location gets caught by monster loop */ 1256. if (!u.usteed) 1257. #endif 1258. newsym(u.ux, u.uy); 1259. } 1260. 1261. /* 1262. * Block/unblock light depending on what a mimic is mimicing and if it's 1263. * invisible or not. Should be called only when the state of See_invisible 1264. * changes. 1265. */ 1266. void 1267. set_mimic_blocking() 1268. { 1269. register struct monst *mon; 1270. 1271. for (mon = fmon; mon; mon = mon->nmon) { 1272. if (DEADMONSTER(mon)) continue; 1273. if (mon->minvis && 1274. ((mon->m_ap_type == M_AP_FURNITURE && 1275. (mon->mappearance == S_vcdoor || mon->mappearance == S_hcdoor)) || 1276. (mon->m_ap_type == M_AP_OBJECT && mon->mappearance == BOULDER))) { 1277. if(See_invisible) 1278. block_point(mon->mx, mon->my); 1279. else 1280. unblock_point(mon->mx, mon->my); 1281. } 1282. } 1283. } 1284. 1285. /* 1286. * Loop through all of the object *locations* and update them. Called when 1287. * + hallucinating. 1288. */ 1289. void 1290. see_objects() 1291. { 1292. register struct obj *obj; 1293. for(obj = fobj; obj; obj = obj->nobj) 1294. if (vobj_at(obj->ox,obj->oy) == obj) newsym(obj->ox, obj->oy); 1295. } 1296. 1297. /* 1298. * Update hallucinated traps. 1299. */ 1300. void 1301. see_traps() 1302. { 1303. struct trap *trap; 1304. int glyph; 1305. 1306. for (trap = ftrap; trap; trap = trap->ntrap) { 1307. glyph = glyph_at(trap->tx, trap->ty); 1308. if (glyph_is_trap(glyph)) 1309. newsym(trap->tx, trap->ty); 1310. } 1311. } 1312. 1313. /* 1314. * Put the cursor on the hero. Flush all accumulated glyphs before doing it. 1315. */ 1316. void 1317. curs_on_u() 1318. { 1319. flush_screen(1); /* Flush waiting glyphs & put cursor on hero */ 1320. } 1321. 1322. int 1323. doredraw() 1324. { 1325. docrt(); 1326. return 0; 1327. } 1328. 1329. void 1330. docrt() 1331. { 1332. register int x,y; 1333. register struct rm *lev; 1334. int i, glyph; 1335. 1336. if (!u.ux) return; /* display isn't ready yet */ 1337. 1338. transp = FALSE; 1339. if (tileset[0]) 1340. for(i = 0; i < no_tilesets; ++i) 1341. if (!strcmpi(tileset, tilesets[i].name)) { 1342. transp = !!(tilesets[i].flags & TILESET_TRANSPARENT); 1343. break; 1344. } 1345. 1346. if (u.uswallow) { 1347. swallowed(1); 1348. return; 1349. } 1350. if (Underwater && !Is_waterlevel(&u.uz)) { 1351. under_water(1); 1352. return; 1353. } 1354. if (u.uburied) { 1355. under_ground(1); 1356. return; 1357. } 1358. 1359. /* shut down vision */ 1360. vision_recalc(2); 1361. 1362. /* 1363. * This routine assumes that cls() does the following: 1364. * + fills the physical screen with the symbol for rock 1365. * + clears the glyph buffer 1366. */ 1367. cls(); 1368. 1369. /* display memory */ 1370. for (x = 1; x < COLNO; x++) { 1371. lev = &levl[x][0]; 1372. for (y = 0; y < ROWNO; y++, lev++) 1373. if ((glyph = memory_glyph(x,y)) != cmap_to_glyph(S_stone)) 1374. show_glyph(x,y,glyph); 1375. } 1376. 1377. /* see what is to be seen */ 1378. vision_recalc(0); 1379. 1380. /* overlay with monsters */ 1381. see_monsters(); 1382. 1383. flags.botlx = 1; /* force a redraw of the bottom line */ 1384. 1385. } 1386. 1387. 1388. /* ========================================================================= */ 1389. /* Glyph Buffering (3rd screen) ============================================ */ 1390. 1391. typedef struct { 1392. xchar new; /* perhaps move this bit into the rm strucure. */ 1393. int glyph; 1394. } gbuf_entry; 1395. 1396. static gbuf_entry gbuf[ROWNO][COLNO]; 1397. static char gbuf_start[ROWNO]; 1398. static char gbuf_stop[ROWNO]; 1399. 1400. /* 1401. * Store the glyph in the 3rd screen for later flushing. 1402. */ 1403. void 1404. show_glyph(x,y,glyph) 1405. int x, y, glyph; 1406. { 1407. /* 1408. * Check for bad positions and glyphs. 1409. */ 1410. if (!isok(x, y)) { 1411. const char *text; 1412. int offset; 1413. 1414. /* column 0 is invalid, but it's often used as a flag, so ignore it */ 1415. if (x == 0) return; 1416. 1417. /* 1418. * This assumes an ordering of the offsets. See display.h for 1419. * the definition. 1420. */ 1421. 1422. if (glyph >= GLYPH_WARNING_OFF) { /* a warning */ 1423. text = "warning"; offset = glyph - GLYPH_WARNING_OFF; 1424. } else if (glyph >= GLYPH_SWALLOW_OFF) { /* swallow border */ 1425. text = "swallow border"; offset = glyph - GLYPH_SWALLOW_OFF; 1426. } else if (glyph >= GLYPH_ZAP_OFF) { /* zap beam */ 1427. text = "zap beam"; offset = glyph - GLYPH_ZAP_OFF; 1428. } else if (glyph >= GLYPH_EXPLODE_OFF) { /* explosion */ 1429. text = "explosion"; offset = glyph - GLYPH_EXPLODE_OFF; 1430. } else if (glyph >= GLYPH_CMAP_OFF) { /* cmap */ 1431. text = "cmap_index"; offset = glyph - GLYPH_CMAP_OFF; 1432. } else if (glyph >= GLYPH_OBJ_OFF) { /* object */ 1433. text = "object"; offset = glyph - GLYPH_OBJ_OFF; 1434. } else if (glyph >= GLYPH_RIDDEN_OFF) { /* ridden mon */ 1435. text = "ridden mon"; offset = glyph - GLYPH_RIDDEN_OFF; 1436. } else if (glyph >= GLYPH_BODY_OFF) { /* a corpse */ 1437. text = "corpse"; offset = glyph - GLYPH_BODY_OFF; 1438. } else if (glyph >= GLYPH_DETECT_OFF) { /* detected mon */ 1439. text = "detected mon"; offset = glyph - GLYPH_DETECT_OFF; 1440. } else if (glyph >= GLYPH_INVIS_OFF) { /* invisible mon */ 1441. text = "invisible mon"; offset = glyph - GLYPH_INVIS_OFF; 1442. } else if (glyph >= GLYPH_PET_OFF) { /* a pet */ 1443. text = "pet"; offset = glyph - GLYPH_PET_OFF; 1444. } else { /* a monster */ 1445. text = "monster"; offset = glyph; 1446. } 1447. 1448. impossible("show_glyph: bad pos %d %d with glyph %d [%s %d].", 1449. x, y, glyph, text, offset); 1450. return; 1451. } 1452. 1453. if (glyph >= MAX_GLYPH) { 1454. impossible("show_glyph: bad glyph %d [max %d] at (%d,%d).", 1455. glyph, MAX_GLYPH, x, y); 1456. return; 1457. } 1458. 1459. /* [ALI] In transparent mode it is not sufficient just to consider 1460. * the foreground glyph, we also need to consider the background. 1461. * Rather than extend the display module to do this, for the time 1462. * being we just turn off optimization and rely on the windowing port 1463. * to ignore redundant calls to print_glyph(). 1464. */ 1465. if (transp || gbuf[y][x].glyph != glyph) { 1466. gbuf[y][x].glyph = glyph; 1467. gbuf[y][x].new = 1; 1468. if (gbuf_start[y] > x) gbuf_start[y] = x; 1469. if (gbuf_stop[y] < x) gbuf_stop[y] = x; 1470. } 1471. } 1472. 1473. 1474. /* 1475. * Reset the changed glyph borders so that none of the 3rd screen has 1476. * changed. 1477. */ 1478. #define reset_glyph_bbox() \ 1479. { \ 1480. int i; \ 1481. \ 1482. for (i = 0; i < ROWNO; i++) { \ 1483. gbuf_start[i] = COLNO-1; \ 1484. gbuf_stop[i] = 0; \ 1485. } \ 1486. } 1487. 1488. 1489. static gbuf_entry nul_gbuf = { 0, cmap_to_glyph(S_stone) }; 1490. /* 1491. * Turn the 3rd screen into stone. 1492. */ 1493. void 1494. clear_glyph_buffer() 1495. { 1496. register int x, y; 1497. register gbuf_entry *gptr; 1498. 1499. for (y = 0; y < ROWNO; y++) { 1500. gptr = &gbuf[y][0]; 1501. for (x = COLNO; x; x--) { 1502. *gptr++ = nul_gbuf; 1503. } 1504. } 1505. reset_glyph_bbox(); 1506. } 1507. 1508. /* 1509. * Assumes that the indicated positions are filled with S_stone glyphs. 1510. */ 1511. void 1512. row_refresh(start,stop,y) 1513. int start,stop,y; 1514. { 1515. register int x; 1516. 1517. for (x = start; x <= stop; x++) 1518. if (gbuf[y][x].glyph != cmap_to_glyph(S_stone)) 1519. print_glyph(WIN_MAP,x,y,gbuf[y][x].glyph); 1520. } 1521. 1522. void 1523. cls() 1524. { 1525. display_nhwindow(WIN_MESSAGE, FALSE); /* flush messages */ 1526. flags.botlx = 1; /* force update of botl window */ 1527. clear_nhwindow(WIN_MAP); /* clear physical screen */ 1528. clear_glyph_buffer(); /* this is sort of an extra effort, but OK */ 1529. } 1530. 1531. /* 1532. * Synch the third screen with the display. 1533. */ 1534. void 1535. flush_screen(cursor_on_u) 1536. int cursor_on_u; 1537. { 1538. /* Prevent infinite loops on errors: 1539. * flush_screen->print_glyph->impossible->pline->flush_screen 1540. */ 1541. static boolean flushing = 0; 1542. static boolean delay_flushing = 0; 1543. register int x,y; 1544. 1545. if (cursor_on_u == -1) delay_flushing = !delay_flushing; 1546. if (delay_flushing) return; 1547. if (flushing) return; /* if already flushing then return */ 1548. flushing = 1; 1549. 1550. for (y = 0; y < ROWNO; y++) { 1551. register gbuf_entry *gptr = &gbuf[y][x = gbuf_start[y]]; 1552. for (; x <= gbuf_stop[y]; gptr++, x++) 1553. if (gptr->new) { 1554. print_glyph(WIN_MAP,x,y,gptr->glyph); 1555. gptr->new = 0; 1556. } 1557. } 1558. 1559. if (cursor_on_u) curs(WIN_MAP, u.ux,u.uy); /* move cursor to the hero */ 1560. display_nhwindow(WIN_MAP, FALSE); 1561. reset_glyph_bbox(); 1562. #ifdef ALLEG_FX 1563. if (iflags.usealleg) alleg_vid_refresh(); 1564. #endif 1565. flushing = 0; 1566. if(flags.botl || flags.botlx) bot(); 1567. } 1568. 1569. /* ========================================================================= */ 1570. 1571. /* 1572. * back_to_cmap() 1573. * 1574. * Use the information in the rm structure at the given position to create 1575. * a glyph of a background. 1576. * 1577. * I had to add a field in the rm structure (horizontal) so that we knew 1578. * if open doors and secret doors were horizontal or vertical. Previously, 1579. * the screen symbol had the horizontal/vertical information set at 1580. * level generation time. 1581. * 1582. * I used the 'ladder' field (really doormask) for deciding if stairwells 1583. * were up or down. I didn't want to check the upstairs and dnstairs 1584. * variables. 1585. */ 1586. STATIC_OVL int 1587. back_to_cmap(x,y) 1588. xchar x,y; 1589. { 1590. int idx; 1591. struct rm *ptr = &(levl[x][y]); 1592. 1593. switch (ptr->typ) { 1594. /* KMH -- support arboreal levels */ 1595. case SCORR: 1596. case STONE: 1597. idx = level.flags.arboreal ? S_tree : S_stone; 1598. break; 1599. case ROOM: idx = S_room; break; 1600. case CORR: 1601. idx = (ptr->waslit || flags.lit_corridor) ? S_litcorr : S_corr; 1602. break; 1603. case HWALL: 1604. case VWALL: 1605. case TLCORNER: 1606. case TRCORNER: 1607. case BLCORNER: 1608. case BRCORNER: 1609. case CROSSWALL: 1610. case TUWALL: 1611. case TDWALL: 1612. case TLWALL: 1613. case TRWALL: 1614. case SDOOR: 1615. idx = ptr->seenv ? wall_angle(ptr) : S_stone; 1616. break; 1617. case IRONBARS: idx = S_bars; break; 1618. case DOOR: 1619. if (ptr->doormask) { 1620. if (ptr->doormask & D_BROKEN) 1621. idx = S_ndoor; 1622. else if (ptr->doormask & D_ISOPEN) 1623. idx = (ptr->horizontal) ? S_hodoor : S_vodoor; 1624. else /* else is closed */ 1625. idx = (ptr->horizontal) ? S_hcdoor : S_vcdoor; 1626. } else 1627. idx = S_ndoor; 1628. break; 1629. case TREE: idx = S_tree; break; 1630. case POOL: 1631. case MOAT: idx = S_pool; break; 1632. case STAIRS: 1633. idx = (ptr->ladder & LA_DOWN) ? S_dnstair : S_upstair; 1634. break; 1635. case LADDER: 1636. idx = (ptr->ladder & LA_DOWN) ? S_dnladder : S_upladder; 1637. break; 1638. case FOUNTAIN: idx = S_fountain; break; 1639. case SINK: idx = S_sink; break; 1640. case TOILET: idx = S_toilet; break; 1641. case GRAVE: idx = S_grave; break; 1642. case ALTAR: idx = S_altar; break; 1643. case THRONE: idx = S_throne; break; 1644. case LAVAPOOL: idx = S_lava; break; 1645. case ICE: idx = S_ice; break; 1646. case AIR: idx = S_air; break; 1647. case CLOUD: idx = S_cloud; break; 1648. case WATER: idx = S_water; break; 1649. case DBWALL: 1650. idx = (ptr->horizontal) ? S_hcdbridge : S_vcdbridge; 1651. break; 1652. case DRAWBRIDGE_UP: 1653. switch(ptr->drawbridgemask & DB_UNDER) { 1654. case DB_MOAT: idx = S_pool; break; 1655. case DB_LAVA: idx = S_lava; break; 1656. case DB_ICE: idx = S_ice; break; 1657. case DB_FLOOR: idx = S_room; break; 1658. default: 1659. impossible("Strange db-under: %d", 1660. ptr->drawbridgemask & DB_UNDER); 1661. idx = S_room; /* something is better than nothing */ 1662. break; 1663. } 1664. break; 1665. case DRAWBRIDGE_DOWN: 1666. idx = (ptr->horizontal) ? S_hodbridge : S_vodbridge; 1667. break; 1668. default: 1669. impossible("back_to_glyph: unknown level type [ = %d ]",ptr->typ); 1670. idx = S_room; 1671. break; 1672. } 1673. return idx; 1674. } 1675. 1676. int 1677. back_to_glyph(x,y) 1678. xchar x,y; 1679. { 1680. return cmap_to_glyph(back_to_cmap(x,y)); 1681. } 1682. 1683. 1684. /* 1685. * swallow_to_glyph() 1686. * 1687. * Convert a monster number and a swallow location into the correct glyph. 1688. * If you don't want a patchwork monster while hallucinating, decide on 1689. * a random monster in swallowed() and don't use what_mon() here. 1690. */ 1691. STATIC_OVL int 1692. swallow_to_glyph(mnum, loc) 1693. int mnum; 1694. int loc; 1695. { 1696. if (loc < S_sw_tl || S_sw_br < loc) { 1697. impossible("swallow_to_glyph: bad swallow location"); 1698. loc = S_sw_br; 1699. } 1700. return ((int) (what_mon(mnum)<<3) | (loc - S_sw_tl)) + GLYPH_SWALLOW_OFF; 1701. } 1702. 1703. 1704. 1705. /* 1706. * zapdir_to_glyph() 1707. * 1708. * Change the given zap direction and beam type into a glyph. Each beam 1709. * type has four glyphs, one for each of the symbols below. The order of 1710. * the zap symbols [0-3] as defined in rm.h are: 1711. * 1712. * | S_vbeam ( 0, 1) or ( 0,-1) 1713. * - S_hbeam ( 1, 0) or (-1, 0) 1714. * \ S_lslant ( 1, 1) or (-1,-1) 1715. * / S_rslant (-1, 1) or ( 1,-1) 1716. */ 1717. int 1718. zapdir_to_glyph(dx, dy, beam_type) 1719. register int dx, dy; 1720. int beam_type; 1721. { 1722. if (beam_type >= NUM_ZAP) { 1723. impossible("zapdir_to_glyph: illegal beam type"); 1724. beam_type = 0; 1725. } 1726. dx = (dx == dy) ? 2 : (dx && dy) ? 3 : dx ? 1 : 0; 1727. 1728. return ((int) ((beam_type << 2) | dx)) + GLYPH_ZAP_OFF; 1729. } 1730. 1731. 1732. /* 1733. * Utility routine for dowhatis() used to find out the glyph displayed at 1734. * the location. This isn't necessarily the same as the glyph in the levl 1735. * structure, so we must check the "third screen". 1736. */ 1737. int 1738. glyph_at(x, y) 1739. xchar x,y; 1740. { 1741. if(x < 0 || y < 0 || x >= COLNO || y >= ROWNO) 1742. return cmap_to_glyph(S_room); /* XXX */ 1743. return gbuf[y][x].glyph; 1744. } 1745. 1746. 1747. /* ------------------------------------------------------------------------- */ 1748. /* Wall Angle -------------------------------------------------------------- */ 1749. 1750. /*#define WA_VERBOSE*/ /* give (x,y) locations for all "bad" spots */ 1751. 1752. #ifdef WA_VERBOSE 1753. 1754. static const char *FDECL(type_to_name, (int)); 1755. static void FDECL(error4, (int,int,int,int,int,int)); 1756. 1757. static int bad_count[MAX_TYPE]; /* count of positions flagged as bad */ 1758. static const char *type_names[MAX_TYPE] = { 1759. "STONE", "VWALL", "HWALL", "TLCORNER", 1760. "TRCORNER", "BLCORNER", "BRCORNER", "CROSSWALL", 1761. "TUWALL", "TDWALL", "TLWALL", "TRWALL", 1762. "DBWALL", "SDOOR", "SCORR", "POOL", 1763. "MOAT", "WATER", "DRAWBRIDGE_UP","LAVAPOOL", 1764. "DOOR", "CORR", "ROOM", "STAIRS", 1765. "LADDER", "FOUNTAIN", "THRONE", "SINK", 1766. "ALTAR", "ICE", "DRAWBRIDGE_DOWN","AIR", 1767. "CLOUD" 1768. }; 1769. 1770. 1771. static const char * 1772. type_to_name(type) 1773. int type; 1774. { 1775. return (type < 0 || type > MAX_TYPE) ? "unknown" : type_names[type]; 1776. } 1777. 1778. STATIC_OVL void 1779. error4(x, y, a, b, c, dd) 1780. int x, y, a, b, c, dd; 1781. { 1782. pline("set_wall_state: %s @ (%d,%d) %s%s%s%s", 1783. type_to_name(levl[x][y].typ), x, y, 1784. a ? "1":"", b ? "2":"", c ? "3":"", dd ? "4":""); 1785. bad_count[levl[x][y].typ]++; 1786. } 1787. #endif /* WA_VERBOSE */ 1788. 1789. /* 1790. * Return 'which' if position is implies an unfinshed exterior. Return 1791. * zero otherwise. Unfinished implies outer area is rock or a corridor. 1792. * 1793. * Things that are ambigious: lava 1794. */ 1795. STATIC_OVL int 1796. check_pos(x, y, which) 1797. int x, y, which; 1798. { 1799. int type; 1800. if (!isok(x,y)) return which; 1801. type = levl[x][y].typ; 1802. if (IS_ROCK(type) || type == CORR || type == SCORR) return which; 1803. return 0; 1804. } 1805. 1806. /* Return TRUE if more than one is non-zero. */ 1807. /*ARGSUSED*/ 1808. #ifdef WA_VERBOSE 1809. STATIC_OVL boolean 1810. more_than_one(x, y, a, b, c) 1811. int x, y, a, b, c; 1812. { 1813. #if defined(MAC_MPW) 1814. # pragma unused ( x,y ) 1815. #endif 1816. if ((a && (b|c)) || (b && (a|c)) || (c && (a|b))) { 1817. error4(x,y,a,b,c,0); 1818. return TRUE; 1819. } 1820. return FALSE; 1821. } 1822. #else 1823. #define more_than_one(x, y, a, b, c) (((a) && ((b)|(c))) || ((b) && ((a)|(c))) || ((c) && ((a)|(b)))) 1824. #endif 1825. 1826. /* Return the wall mode for a T wall. */ 1827. STATIC_OVL int 1828. set_twall(x0,y0, x1,y1, x2,y2, x3,y3) 1829. int x0,y0, x1,y1, x2,y2, x3,y3; 1830. { 1831. int wmode, is_1, is_2, is_3; 1832. 1833. is_1 = check_pos(x1, y1, WM_T_LONG); 1834. is_2 = check_pos(x2, y2, WM_T_BL); 1835. is_3 = check_pos(x3, y3, WM_T_BR); 1836. if (more_than_one(x0, y0, is_1, is_2, is_3)) { 1837. wmode = 0; 1838. } else { 1839. wmode = is_1 + is_2 + is_3; 1840. } 1841. return wmode; 1842. } 1843. 1844. /* Return wall mode for a horizontal or vertical wall. */ 1845. STATIC_OVL int 1846. set_wall(x, y, horiz) 1847. int x, y, horiz; 1848. { 1849. int wmode, is_1, is_2; 1850. 1851. if (horiz) { 1852. is_1 = check_pos(x,y-1, WM_W_TOP); 1853. is_2 = check_pos(x,y+1, WM_W_BOTTOM); 1854. } else { 1855. is_1 = check_pos(x-1,y, WM_W_LEFT); 1856. is_2 = check_pos(x+1,y, WM_W_RIGHT); 1857. } 1858. if (more_than_one(x, y, is_1, is_2, 0)) { 1859. wmode = 0; 1860. } else { 1861. wmode = is_1 + is_2; 1862. } 1863. return wmode; 1864. } 1865. 1866. /* 1867. * If an invisible monster has gone away, that will be discovered. If an 1868. * invisible monster has appeared, this will _not_ be discovered since 1869. * searching only finds one monster per turn so we must check that separately. 1870. * 1871. * Return a wall mode for a corner wall. (x4,y4) is the "inner" position. 1872. */ 1873. STATIC_OVL int 1874. set_corn(x1,y1, x2,y2, x3,y3, x4,y4) 1875. int x1, y1, x2, y2, x3, y3, x4, y4; 1876. { 1877. int wmode, is_1, is_2, is_3, is_4; 1878. 1879. is_1 = check_pos(x1, y1, 1); 1880. is_2 = check_pos(x2, y2, 1); 1881. is_3 = check_pos(x3, y3, 1); 1882. is_4 = check_pos(x4, y4, 1); /* inner location */ 1883. 1884. /* 1885. * All 4 should not be true. So if the inner location is rock, 1886. * use it. If all of the outer 3 are true, use outer. We currently 1887. * can't cover the case where only part of the outer is rock, so 1888. * we just say that all the walls are finished (if not overridden 1889. * by the inner section). 1890. */ 1891. if (is_4) { 1892. wmode = WM_C_INNER; 1893. } else if (is_1 && is_2 && is_3) 1894. wmode = WM_C_OUTER; 1895. else 1896. wmode = 0; /* finished walls on all sides */ 1897. 1898. return wmode; 1899. } 1900. 1901. /* Return mode for a crosswall. */ 1902. STATIC_OVL int 1903. set_crosswall(x, y) 1904. int x, y; 1905. { 1906. int wmode, is_1, is_2, is_3, is_4; 1907. 1908. is_1 = check_pos(x-1, y-1, 1); 1909. is_2 = check_pos(x+1, y-1, 1); 1910. is_3 = check_pos(x+1, y+1, 1); 1911. is_4 = check_pos(x-1, y+1, 1); 1912. 1913. wmode = is_1+is_2+is_3+is_4; 1914. if (wmode > 1) { 1915. if (is_1 && is_3 && (is_2+is_4 == 0)) { 1916. wmode = WM_X_TLBR; 1917. } else if (is_2 && is_4 && (is_1+is_3 == 0)) { 1918. wmode = WM_X_BLTR; 1919. } else { 1920. #ifdef WA_VERBOSE 1921. error4(x,y,is_1,is_2,is_3,is_4); 1922. #endif 1923. wmode = 0; 1924. } 1925. } else if (is_1) 1926. wmode = WM_X_TL; 1927. else if (is_2) 1928. wmode = WM_X_TR; 1929. else if (is_3) 1930. wmode = WM_X_BR; 1931. else if (is_4) 1932. wmode = WM_X_BL; 1933. 1934. return wmode; 1935. } 1936. 1937. /* Called from mklev. Scan the level and set the wall modes. */ 1938. void 1939. set_wall_state() 1940. { 1941. int x, y; 1942. int wmode; 1943. struct rm *lev; 1944. 1945. #ifdef WA_VERBOSE 1946. for (x = 0; x < MAX_TYPE; x++) bad_count[x] = 0; 1947. #endif 1948. 1949. for (x = 0; x < COLNO; x++) 1950. for (lev = &levl[x][0], y = 0; y < ROWNO; y++, lev++) { 1951. switch (lev->typ) { 1952. case SDOOR: 1953. wmode = set_wall(x, y, (int) lev->horizontal); 1954. break; 1955. case VWALL: 1956. wmode = set_wall(x, y, 0); 1957. break; 1958. case HWALL: 1959. wmode = set_wall(x, y, 1); 1960. break; 1961. case TDWALL: 1962. wmode = set_twall(x,y, x,y-1, x-1,y+1, x+1,y+1); 1963. break; 1964. case TUWALL: 1965. wmode = set_twall(x,y, x,y+1, x+1,y-1, x-1,y-1); 1966. break; 1967. case TLWALL: 1968. wmode = set_twall(x,y, x+1,y, x-1,y-1, x-1,y+1); 1969. break; 1970. case TRWALL: 1971. wmode = set_twall(x,y, x-1,y, x+1,y+1, x+1,y-1); 1972. break; 1973. case TLCORNER: 1974. wmode = set_corn(x-1,y-1, x,y-1, x-1,y, x+1,y+1); 1975. break; 1976. case TRCORNER: 1977. wmode = set_corn(x,y-1, x+1,y-1, x+1,y, x-1,y+1); 1978. break; 1979. case BLCORNER: 1980. wmode = set_corn(x,y+1, x-1,y+1, x-1,y, x+1,y-1); 1981. break; 1982. case BRCORNER: 1983. wmode = set_corn(x+1,y, x+1,y+1, x,y+1, x-1,y-1); 1984. break; 1985. case CROSSWALL: 1986. wmode = set_crosswall(x, y); 1987. break; 1988. 1989. default: 1990. wmode = -1; /* don't set wall info */ 1991. break; 1992. } 1993. 1994. if (wmode >= 0) 1995. lev->wall_info = (lev->wall_info & ~WM_MASK) | wmode; 1996. } 1997. 1998. #ifdef WA_VERBOSE 1999. /* check if any bad positions found */ 2000. for (x = y = 0; x < MAX_TYPE; x++) 2001. if (bad_count[x]) { 2002. if (y == 0) { 2003. y = 1; /* only print once */ 2004. pline("set_wall_type: wall mode problems with: "); 2005. } 2006. pline("%s %d;", type_names[x], bad_count[x]); 2007. } 2008. #endif /* WA_VERBOSE */ 2009. } 2010. 2011. /* ------------------------------------------------------------------------- */ 2012. /* This matrix is used here and in vision.c. */ 2013. unsigned char seenv_matrix[3][3] = { {SV2, SV1, SV0}, 2014. {SV3, SVALL, SV7}, 2015. {SV4, SV5, SV6} }; 2016. 2017. #define sign(z) ((z) < 0 ? -1 : ((z) > 0 ? 1 : 0)) 2018. 2019. /* Set the seen vector of lev as if seen from (x0,y0) to (x,y). */ 2020. STATIC_OVL void 2021. set_seenv(lev, x0, y0, x, y) 2022. struct rm *lev; 2023. int x0, y0, x, y; /* from, to */ 2024. { 2025. int dx = x-x0, dy = y0-y; 2026. lev->seenv |= seenv_matrix[sign(dy)+1][sign(dx)+1]; 2027. } 2028. 2029. /* ------------------------------------------------------------------------- */ 2030. 2031. /* T wall types, one for each row in wall_matrix[][]. */ 2032. #define T_d 0 2033. #define T_l 1 2034. #define T_u 2 2035. #define T_r 3 2036. 2037. /* 2038. * These are the column names of wall_matrix[][]. They are the "results" 2039. * of a tdwall pattern match. All T walls are rotated so they become 2040. * a tdwall. Then we do a single pattern match, but return the 2041. * correct result for the original wall by using different rows for 2042. * each of the wall types. 2043. */ 2044. #define T_stone 0 2045. #define T_tlcorn 1 2046. #define T_trcorn 2 2047. #define T_hwall 3 2048. #define T_tdwall 4 2049. 2050. static const int wall_matrix[4][5] = { 2051. { S_stone, S_tlcorn, S_trcorn, S_hwall, S_tdwall }, /* tdwall */ 2052. { S_stone, S_trcorn, S_brcorn, S_vwall, S_tlwall }, /* tlwall */ 2053. { S_stone, S_brcorn, S_blcorn, S_hwall, S_tuwall }, /* tuwall */ 2054. { S_stone, S_blcorn, S_tlcorn, S_vwall, S_trwall }, /* trwall */ 2055. }; 2056. 2057. 2058. /* Cross wall types, one for each "solid" quarter. Rows of cross_matrix[][]. */ 2059. #define C_bl 0 2060. #define C_tl 1 2061. #define C_tr 2 2062. #define C_br 3 2063. 2064. /* 2065. * These are the column names for cross_matrix[][]. They express results 2066. * in C_br (bottom right) terms. All crosswalls with a single solid 2067. * quarter are rotated so the solid section is at the bottom right. 2068. * We pattern match on that, but return the correct result depending 2069. * on which row we'ere looking at. 2070. */ 2071. #define C_trcorn 0 2072. #define C_brcorn 1 2073. #define C_blcorn 2 2074. #define C_tlwall 3 2075. #define C_tuwall 4 2076. #define C_crwall 5 2077. 2078. static const int cross_matrix[4][6] = { 2079. { S_brcorn, S_blcorn, S_tlcorn, S_tuwall, S_trwall, S_crwall }, 2080. { S_blcorn, S_tlcorn, S_trcorn, S_trwall, S_tdwall, S_crwall }, 2081. { S_tlcorn, S_trcorn, S_brcorn, S_tdwall, S_tlwall, S_crwall }, 2082. { S_trcorn, S_brcorn, S_blcorn, S_tlwall, S_tuwall, S_crwall }, 2083. }; 2084. 2085. 2086. /* Print out a T wall warning and all interesting info. */ 2087. STATIC_OVL void 2088. t_warn(lev) 2089. struct rm *lev; 2090. { 2091. static const char warn_str[] = "wall_angle: %s: case %d: seenv = 0x%x"; 2092. const char *wname; 2093. 2094. if (lev->typ == TUWALL) wname = "tuwall"; 2095. else if (lev->typ == TLWALL) wname = "tlwall"; 2096. else if (lev->typ == TRWALL) wname = "trwall"; 2097. else if (lev->typ == TDWALL) wname = "tdwall"; 2098. else wname = "unknown"; 2099. impossible(warn_str, wname, lev->wall_info & WM_MASK, 2100. (unsigned int) lev->seenv); 2101. } 2102. 2103. 2104. /* 2105. * Return the correct graphics character index using wall type, wall mode, 2106. * and the seen vector. It is expected that seenv is non zero. 2107. * 2108. * All T-wall vectors are rotated to be TDWALL. All single crosswall 2109. * blocks are rotated to bottom right. All double crosswall are rotated 2110. * to W_X_BLTR. All results are converted back. 2111. * 2112. * The only way to understand this is to take out pen and paper and 2113. * draw diagrams. See rm.h for more details on the wall modes and 2114. * seen vector (SV). 2115. */ 2116. STATIC_OVL int 2117. wall_angle(lev) 2118. struct rm *lev; 2119. { 2120. register unsigned int seenv = lev->seenv & 0xff; 2121. const int *row; 2122. int col, idx; 2123. 2124. #define only(sv, bits) (((sv) & (bits)) && ! ((sv) & ~(bits))) 2125. switch (lev->typ) { 2126. case TUWALL: 2127. row = wall_matrix[T_u]; 2128. seenv = (seenv >> 4 | seenv << 4) & 0xff;/* rotate to tdwall */ 2129. goto do_twall; 2130. case TLWALL: 2131. row = wall_matrix[T_l]; 2132. seenv = (seenv >> 2 | seenv << 6) & 0xff;/* rotate to tdwall */ 2133. goto do_twall; 2134. case TRWALL: 2135. row = wall_matrix[T_r]; 2136. seenv = (seenv >> 6 | seenv << 2) & 0xff;/* rotate to tdwall */ 2137. goto do_twall; 2138. case TDWALL: 2139. row = wall_matrix[T_d]; 2140. do_twall: 2141. switch (lev->wall_info & WM_MASK) { 2142. case 0: 2143. if (seenv == SV4) { 2144. col = T_tlcorn; 2145. } else if (seenv == SV6) { 2146. col = T_trcorn; 2147. } else if (seenv & (SV3|SV5|SV7) || 2148. ((seenv & SV4) && (seenv & SV6))) { 2149. col = T_tdwall; 2150. } else if (seenv & (SV0|SV1|SV2)) { 2151. col = (seenv & (SV4|SV6) ? T_tdwall : T_hwall); 2152. } else { 2153. t_warn(lev); 2154. col = T_stone; 2155. } 2156. break; 2157. case WM_T_LONG: 2158. if (seenv & (SV3|SV4) && !(seenv & (SV5|SV6|SV7))) { 2159. col = T_tlcorn; 2160. } else if (seenv&(SV6|SV7) && !(seenv&(SV3|SV4|SV5))) { 2161. col = T_trcorn; 2162. } else if ((seenv & SV5) || 2163. ((seenv & (SV3|SV4)) && (seenv & (SV6|SV7)))) { 2164. col = T_tdwall; 2165. } else { 2166. /* only SV0|SV1|SV2 */ 2167. if (! only(seenv, SV0|SV1|SV2) ) 2168. t_warn(lev); 2169. col = T_stone; 2170. } 2171. break; 2172. case WM_T_BL: 2173. #if 0 /* older method, fixed */ 2174. if (only(seenv, SV4|SV5)) { 2175. col = T_tlcorn; 2176. } else if ((seenv & (SV0|SV1|SV2)) && 2177. only(seenv, SV0|SV1|SV2|SV6|SV7)) { 2178. col = T_hwall; 2179. } else if (seenv & SV3 || 2180. ((seenv & (SV0|SV1|SV2)) && (seenv & (SV4|SV5)))) { 2181. col = T_tdwall; 2182. } else { 2183. if (seenv != SV6) 2184. t_warn(lev); 2185. col = T_stone; 2186. } 2187. #endif /* 0 */ 2188. if (only(seenv, SV4|SV5)) 2189. col = T_tlcorn; 2190. else if ((seenv & (SV0|SV1|SV2|SV7)) && 2191. !(seenv & (SV3|SV4|SV5))) 2192. col = T_hwall; 2193. else if (only(seenv, SV6)) 2194. col = T_stone; 2195. else 2196. col = T_tdwall; 2197. break; 2198. case WM_T_BR: 2199. #if 0 /* older method, fixed */ 2200. if (only(seenv, SV5|SV6)) { 2201. col = T_trcorn; 2202. } else if ((seenv & (SV0|SV1|SV2)) && 2203. only(seenv, SV0|SV1|SV2|SV3|SV4)) { 2204. col = T_hwall; 2205. } else if (seenv & SV7 || 2206. ((seenv & (SV0|SV1|SV2)) && (seenv & (SV5|SV6)))) { 2207. col = T_tdwall; 2208. } else { 2209. if (seenv != SV4) 2210. t_warn(lev); 2211. col = T_stone; 2212. } 2213. #endif /* 0 */ 2214. if (only(seenv, SV5|SV6)) 2215. col = T_trcorn; 2216. else if ((seenv & (SV0|SV1|SV2|SV3)) && 2217. !(seenv & (SV5|SV6|SV7))) 2218. col = T_hwall; 2219. else if (only(seenv, SV4)) 2220. col = T_stone; 2221. else 2222. col = T_tdwall; 2223. 2224. break; 2225. default: 2226. impossible("wall_angle: unknown T wall mode %d", 2227. lev->wall_info & WM_MASK); 2228. col = T_stone; 2229. break; 2230. } 2231. idx = row[col]; 2232. break; 2233. 2234. case SDOOR: 2235. if (lev->horizontal) goto horiz; 2236. /* fall through */ 2237. case VWALL: 2238. switch (lev->wall_info & WM_MASK) { 2239. case 0: idx = seenv ? S_vwall : S_stone; break; 2240. case 1: idx = seenv & (SV1|SV2|SV3|SV4|SV5) ? S_vwall : 2241. S_stone; 2242. break; 2243. case 2: idx = seenv & (SV0|SV1|SV5|SV6|SV7) ? S_vwall : 2244. S_stone; 2245. break; 2246. default: 2247. impossible("wall_angle: unknown vwall mode %d", 2248. lev->wall_info & WM_MASK); 2249. idx = S_stone; 2250. break; 2251. } 2252. break; 2253. 2254. case HWALL: 2255. horiz: 2256. switch (lev->wall_info & WM_MASK) { 2257. case 0: idx = seenv ? S_hwall : S_stone; break; 2258. case 1: idx = seenv & (SV3|SV4|SV5|SV6|SV7) ? S_hwall : 2259. S_stone; 2260. break; 2261. case 2: idx = seenv & (SV0|SV1|SV2|SV3|SV7) ? S_hwall : 2262. S_stone; 2263. break; 2264. default: 2265. impossible("wall_angle: unknown hwall mode %d", 2266. lev->wall_info & WM_MASK); 2267. idx = S_stone; 2268. break; 2269. } 2270. break; 2271. 2272. #define set_corner(idx, lev, which, outer, inner, name) \ 2273. switch ((lev)->wall_info & WM_MASK) { \ 2274. case 0: idx = which; break; \ 2275. case WM_C_OUTER: idx = seenv & (outer) ? which : S_stone; break; \ 2276. case WM_C_INNER: idx = seenv & ~(inner) ? which : S_stone; break; \ 2277. default: \ 2278. impossible("wall_angle: unknown %s mode %d", name, \ 2279. (lev)->wall_info & WM_MASK); \ 2280. idx = S_stone; \ 2281. break; \ 2282. } 2283. 2284. case TLCORNER: 2285. set_corner(idx, lev, S_tlcorn, (SV3|SV4|SV5), SV4, "tlcorn"); 2286. break; 2287. case TRCORNER: 2288. set_corner(idx, lev, S_trcorn, (SV5|SV6|SV7), SV6, "trcorn"); 2289. break; 2290. case BLCORNER: 2291. set_corner(idx, lev, S_blcorn, (SV1|SV2|SV3), SV2, "blcorn"); 2292. break; 2293. case BRCORNER: 2294. set_corner(idx, lev, S_brcorn, (SV7|SV0|SV1), SV0, "brcorn"); 2295. break; 2296. 2297. 2298. case CROSSWALL: 2299. switch (lev->wall_info & WM_MASK) { 2300. case 0: 2301. if (seenv == SV0) 2302. idx = S_brcorn; 2303. else if (seenv == SV2) 2304. idx = S_blcorn; 2305. else if (seenv == SV4) 2306. idx = S_tlcorn; 2307. else if (seenv == SV6) 2308. idx = S_trcorn; 2309. else if (!(seenv & ~(SV0|SV1|SV2)) && 2310. (seenv & SV1 || seenv == (SV0|SV2))) 2311. idx = S_tuwall; 2312. else if (!(seenv & ~(SV2|SV3|SV4)) && 2313. (seenv & SV3 || seenv == (SV2|SV4))) 2314. idx = S_trwall; 2315. else if (!(seenv & ~(SV4|SV5|SV6)) && 2316. (seenv & SV5 || seenv == (SV4|SV6))) 2317. idx = S_tdwall; 2318. else if (!(seenv & ~(SV0|SV6|SV7)) && 2319. (seenv & SV7 || seenv == (SV0|SV6))) 2320. idx = S_tlwall; 2321. else 2322. idx = S_crwall; 2323. break; 2324. 2325. case WM_X_TL: 2326. row = cross_matrix[C_tl]; 2327. seenv = (seenv >> 4 | seenv << 4) & 0xff; 2328. goto do_crwall; 2329. case WM_X_TR: 2330. row = cross_matrix[C_tr]; 2331. seenv = (seenv >> 6 | seenv << 2) & 0xff; 2332. goto do_crwall; 2333. case WM_X_BL: 2334. row = cross_matrix[C_bl]; 2335. seenv = (seenv >> 2 | seenv << 6) & 0xff; 2336. goto do_crwall; 2337. case WM_X_BR: 2338. row = cross_matrix[C_br]; 2339. do_crwall: 2340. if (seenv == SV4) 2341. idx = S_stone; 2342. else { 2343. seenv = seenv & ~SV4; /* strip SV4 */ 2344. if (seenv == SV0) { 2345. col = C_brcorn; 2346. } else if (seenv & (SV2|SV3)) { 2347. if (seenv & (SV5|SV6|SV7)) 2348. col = C_crwall; 2349. else if (seenv & (SV0|SV1)) 2350. col = C_tuwall; 2351. else 2352. col = C_blcorn; 2353. } else if (seenv & (SV5|SV6)) { 2354. if (seenv & (SV1|SV2|SV3)) 2355. col = C_crwall; 2356. else if (seenv & (SV0|SV7)) 2357. col = C_tlwall; 2358. else 2359. col = C_trcorn; 2360. } else if (seenv & SV1) { 2361. col = seenv & SV7 ? C_crwall : C_tuwall; 2362. } else if (seenv & SV7) { 2363. col = seenv & SV1 ? C_crwall : C_tlwall; 2364. } else { 2365. impossible( 2366. "wall_angle: bottom of crwall check"); 2367. col = C_crwall; 2368. } 2369. 2370. idx = row[col]; 2371. } 2372. break; 2373. 2374. case WM_X_TLBR: 2375. if ( only(seenv, SV1|SV2|SV3) ) 2376. idx = S_blcorn; 2377. else if ( only(seenv, SV5|SV6|SV7) ) 2378. idx = S_trcorn; 2379. else if ( only(seenv, SV0|SV4) ) 2380. idx = S_stone; 2381. else 2382. idx = S_crwall; 2383. break; 2384. 2385. case WM_X_BLTR: 2386. if ( only(seenv, SV0|SV1|SV7) ) 2387. idx = S_brcorn; 2388. else if ( only(seenv, SV3|SV4|SV5) ) 2389. idx = S_tlcorn; 2390. else if ( only(seenv, SV2|SV6) ) 2391. idx = S_stone; 2392. else 2393. idx = S_crwall; 2394. break; 2395. 2396. default: 2397. impossible("wall_angle: unknown crosswall mode"); 2398. idx = S_stone; 2399. break; 2400. } 2401. break; 2402. 2403. default: 2404. impossible("wall_angle: unexpected wall type %d", lev->typ); 2405. idx = S_stone; 2406. } 2407. return idx; 2408. } 2409. 2410. /*display.c*/
