Fandom

Wikihack

Source:NetHack 3.4.0/dbridge.c

2,034pages on
this wiki
Add New Page
Talk0

Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.

Below is the full text to dbridge.c from the source code of NetHack 3.4.0. To link to a particular line, write [[NetHack 3.4.0/dbridge.c#line123]], for example.

Warning! This is the source code from an old release. For the latest release, see Source code

The NetHack General Public License applies to screenshots, source code and other content from NetHack.
1.    /*	SCCS Id: @(#)dbridge.c	3.4	2000/02/05	*/
2.    /*	Copyright (c) 1989 by Jean-Christophe Collet		  */
3.    /* NetHack may be freely redistributed.  See license for details. */
4.    
5.    /*
6.     * This file contains the drawbridge manipulation (create, open, close,
7.     * destroy).
8.     *
9.     * Added comprehensive monster-handling, and the "entity" structure to
10.    * deal with players as well. - 11/89
11.    */
12.   
13.   #include "hack.h"
14.   
15.   #ifdef OVLB
16.   STATIC_DCL void FDECL(get_wall_for_db, (int *, int *));
17.   STATIC_DCL struct entity *FDECL(e_at, (int, int));
18.   STATIC_DCL void FDECL(m_to_e, (struct monst *, int, int, struct entity *));
19.   STATIC_DCL void FDECL(u_to_e, (struct entity *));
20.   STATIC_DCL void FDECL(set_entity, (int, int, struct entity *));
21.   STATIC_DCL const char *FDECL(e_nam, (struct entity *));
22.   #ifdef D_DEBUG
23.   static const char *FDECL(Enam, (struct entity *)); /* unused */
24.   #endif
25.   STATIC_DCL const char *FDECL(E_phrase, (struct entity *, const char *));
26.   STATIC_DCL boolean FDECL(e_survives_at, (struct entity *, int, int));
27.   STATIC_DCL void FDECL(e_died, (struct entity *, int, int));
28.   STATIC_DCL boolean FDECL(automiss, (struct entity *));
29.   STATIC_DCL boolean FDECL(e_missed, (struct entity *, BOOLEAN_P));
30.   STATIC_DCL boolean FDECL(e_jumps, (struct entity *));
31.   STATIC_DCL void FDECL(do_entity, (struct entity *));
32.   #endif /* OVLB */
33.   
34.   #ifdef OVL0
35.   
36.   boolean
37.   is_pool(x,y)
38.   int x,y;
39.   {
40.       schar ltyp;
41.   
42.       if (!isok(x,y)) return FALSE;
43.       ltyp = levl[x][y].typ;
44.       if (ltyp == POOL || ltyp == MOAT || ltyp == WATER) return TRUE;
45.       if (ltyp == DRAWBRIDGE_UP &&
46.   	(levl[x][y].drawbridgemask & DB_UNDER) == DB_MOAT) return TRUE;
47.       return FALSE;
48.   }
49.   
50.   boolean
51.   is_lava(x,y)
52.   int x,y;
53.   {
54.       schar ltyp;
55.   
56.       if (!isok(x,y)) return FALSE;
57.       ltyp = levl[x][y].typ;
58.       if (ltyp == LAVAPOOL
59.   	|| (ltyp == DRAWBRIDGE_UP
60.   	    && (levl[x][y].drawbridgemask & DB_UNDER) == DB_LAVA)) return TRUE;
61.       return FALSE;
62.   }
63.   
64.   boolean
65.   is_ice(x,y)
66.   int x,y;
67.   {
68.       schar ltyp;
69.   
70.       if (!isok(x,y)) return FALSE;
71.       ltyp = levl[x][y].typ;
72.       if (ltyp == ICE
73.   	|| (ltyp == DRAWBRIDGE_UP
74.   	    && (levl[x][y].drawbridgemask & DB_UNDER) == DB_ICE)) return TRUE;
75.       return FALSE;
76.   }
77.   
78.   #endif /* OVL0 */
79.   
80.   #ifdef OVL1
81.   
82.   /*
83.    * We want to know whether a wall (or a door) is the portcullis (passageway)
84.    * of an eventual drawbridge.
85.    *
86.    * Return value:  the direction of the drawbridge.
87.    */
88.   
89.   int
90.   is_drawbridge_wall(x,y)
91.   int x,y;
92.   {
93.   	struct rm *lev;
94.   
95.   	lev = &levl[x][y];
96.   	if (lev->typ != DOOR && lev->typ != DBWALL)
97.   		return (-1);
98.   
99.   	if (IS_DRAWBRIDGE(levl[x+1][y].typ) &&
100.  	    (levl[x+1][y].drawbridgemask & DB_DIR) == DB_WEST)
101.  		return (DB_WEST);
102.  	if (IS_DRAWBRIDGE(levl[x-1][y].typ) &&
103.  	    (levl[x-1][y].drawbridgemask & DB_DIR) == DB_EAST)
104.  		return (DB_EAST);
105.  	if (IS_DRAWBRIDGE(levl[x][y-1].typ) &&
106.  	    (levl[x][y-1].drawbridgemask & DB_DIR) == DB_SOUTH)
107.  		return (DB_SOUTH);
108.  	if (IS_DRAWBRIDGE(levl[x][y+1].typ) &&
109.  	    (levl[x][y+1].drawbridgemask & DB_DIR) == DB_NORTH)
110.  		return (DB_NORTH);
111.  
112.  	return (-1);
113.  }
114.  
115.  /*
116.   * Use is_db_wall where you want to verify that a
117.   * drawbridge "wall" is UP in the location x, y
118.   * (instead of UP or DOWN, as with is_drawbridge_wall).
119.   */
120.  boolean
121.  is_db_wall(x,y)
122.  int x,y;
123.  {
124.  	return((boolean)( levl[x][y].typ == DBWALL ));
125.  }
126.  
127.  
128.  /*
129.   * Return true with x,y pointing to the drawbridge if x,y initially indicate
130.   * a drawbridge or drawbridge wall.
131.   */
132.  boolean
133.  find_drawbridge(x,y)
134.  int *x,*y;
135.  {
136.  	int dir;
137.  
138.  	if (IS_DRAWBRIDGE(levl[*x][*y].typ))
139.  		return TRUE;
140.  	dir = is_drawbridge_wall(*x,*y);
141.  	if (dir >= 0) {
142.  		switch(dir) {
143.  			case DB_NORTH: (*y)++; break;
144.  			case DB_SOUTH: (*y)--; break;
145.  			case DB_EAST:  (*x)--; break;
146.  			case DB_WEST:  (*x)++; break;
147.  		}
148.  		return TRUE;
149.  	}
150.  	return FALSE;
151.  }
152.  
153.  #endif /* OVL1 */
154.  #ifdef OVLB
155.  
156.  /*
157.   * Find the drawbridge wall associated with a drawbridge.
158.   */
159.  STATIC_OVL void
160.  get_wall_for_db(x,y)
161.  int *x,*y;
162.  {
163.  	switch (levl[*x][*y].drawbridgemask & DB_DIR) {
164.  		case DB_NORTH: (*y)--; break;
165.  		case DB_SOUTH: (*y)++; break;
166.  		case DB_EAST:  (*x)++; break;
167.  		case DB_WEST:  (*x)--; break;
168.  	}
169.  }
170.  
171.  /*
172.   * Creation of a drawbridge at pos x,y.
173.   *     dir is the direction.
174.   *     flag must be put to TRUE if we want the drawbridge to be opened.
175.   */
176.  
177.  boolean
178.  create_drawbridge(x,y,dir,flag)
179.  int x,y,dir;
180.  boolean flag;
181.  {
182.  	int x2,y2;
183.  	boolean horiz;
184.  	boolean lava = levl[x][y].typ == LAVAPOOL; /* assume initialized map */
185.  
186.  	x2 = x; y2 = y;
187.  	switch(dir) {
188.  		case DB_NORTH:
189.  			horiz = TRUE;
190.  			y2--;
191.  			break;
192.  		case DB_SOUTH:
193.  			horiz = TRUE;
194.  			y2++;
195.  			break;
196.  		case DB_EAST:
197.  			horiz = FALSE;
198.  			x2++;
199.  			break;
200.  		default:
201.  			impossible("bad direction in create_drawbridge");
202.  			/* fall through */
203.  		case DB_WEST:
204.  			horiz = FALSE;
205.  			x2--;
206.  			break;
207.  	}
208.  	if (!IS_WALL(levl[x2][y2].typ))
209.  		return(FALSE);
210.  	if (flag) {             /* We want the bridge open */
211.  		levl[x][y].typ = DRAWBRIDGE_DOWN;
212.  		levl[x2][y2].typ = DOOR;
213.  		levl[x2][y2].doormask = D_NODOOR;
214.  	} else {
215.  		levl[x][y].typ = DRAWBRIDGE_UP;
216.  		levl[x2][y2].typ = DBWALL;
217.  		/* Drawbridges are non-diggable. */
218.  		levl[x2][y2].wall_info = W_NONDIGGABLE;
219.  	}
220.  	levl[x][y].horizontal = !horiz;
221.  	levl[x2][y2].horizontal = horiz;
222.  	levl[x][y].drawbridgemask = dir;
223.  	if(lava) levl[x][y].drawbridgemask |= DB_LAVA;
224.  	return(TRUE);
225.  }
226.  
227.  struct entity {
228.  	struct monst *emon;	  /* youmonst for the player */
229.  	struct permonst *edata;   /* must be non-zero for record to be valid */
230.  	int ex, ey;
231.  };
232.  
233.  #define ENTITIES 2
234.  
235.  static NEARDATA struct entity occupants[ENTITIES];
236.  
237.  STATIC_OVL
238.  struct entity *
239.  e_at(x, y)
240.  int x, y;
241.  {
242.  	int entitycnt;
243.  
244.  	for (entitycnt = 0; entitycnt < ENTITIES; entitycnt++)
245.  		if ((occupants[entitycnt].edata) &&
246.  		    (occupants[entitycnt].ex == x) &&
247.  		    (occupants[entitycnt].ey == y))
248.  			break;
249.  #ifdef D_DEBUG
250.  	pline("entitycnt = %d", entitycnt);
251.  	wait_synch();
252.  #endif
253.  	return((entitycnt == ENTITIES)?
254.  	       (struct entity *)0 : &(occupants[entitycnt]));
255.  }
256.  
257.  STATIC_OVL void
258.  m_to_e(mtmp, x, y, etmp)
259.  struct monst *mtmp;
260.  int x, y;
261.  struct entity *etmp;
262.  {
263.  	etmp->emon = mtmp;
264.  	if (mtmp) {
265.  		etmp->ex = x;
266.  		etmp->ey = y;
267.  		if (mtmp->wormno && (x != mtmp->mx || y != mtmp->my))
268.  			etmp->edata = &mons[PM_LONG_WORM_TAIL];
269.  		else
270.  			etmp->edata = mtmp->data;
271.  	} else
272.  		etmp->edata = (struct permonst *)0;
273.  }
274.  
275.  STATIC_OVL void
276.  u_to_e(etmp)
277.  struct entity *etmp;
278.  {
279.  	etmp->emon = &youmonst;
280.  	etmp->ex = u.ux;
281.  	etmp->ey = u.uy;
282.  	etmp->edata = youmonst.data;
283.  }
284.  
285.  STATIC_OVL void
286.  set_entity(x, y, etmp)
287.  int x, y;
288.  struct entity *etmp;
289.  {
290.  	if ((x == u.ux) && (y == u.uy))
291.  		u_to_e(etmp);
292.  	else if (MON_AT(x, y))
293.  		m_to_e(m_at(x, y), x, y, etmp);
294.  	else
295.  		etmp->edata = (struct permonst *)0;
296.  }
297.  
298.  #define is_u(etmp) (etmp->emon == &youmonst)
299.  #define e_canseemon(etmp) (is_u(etmp) ? (boolean)TRUE : canseemon(etmp->emon))
300.  
301.  /*
302.   * e_strg is a utility routine which is not actually in use anywhere, since
303.   * the specialized routines below suffice for all current purposes.
304.   */
305.  
306.  /* #define e_strg(etmp, func) (is_u(etmp)? (char *)0 : func(etmp->emon)) */
307.  
308.  STATIC_OVL const char *
309.  e_nam(etmp)
310.  struct entity *etmp;
311.  {
312.  	return(is_u(etmp)? "you" : mon_nam(etmp->emon));
313.  }
314.  
315.  #ifdef D_DEBUG
316.  /*
317.   * Enam is another unused utility routine:  E_phrase is preferable.
318.   */
319.  
320.  static const char *
321.  Enam(etmp)
322.  struct entity *etmp;
323.  {
324.  	return(is_u(etmp)? "You" : Monnam(etmp->emon));
325.  }
326.  #endif /* D_DEBUG */
327.  
328.  /*
329.   * Generates capitalized entity name, makes 2nd -> 3rd person conversion on
330.   * verb, where necessary.
331.   */
332.  
333.  STATIC_OVL const char *
334.  E_phrase(etmp, verb)
335.  struct entity *etmp;
336.  const char *verb;
337.  {
338.  	static char wholebuf[80];
339.  
340.  	Strcpy(wholebuf, is_u(etmp) ? "You" : Monnam(etmp->emon));
341.  	if (!*verb) return(wholebuf);
342.  	Strcat(wholebuf, " ");
343.  	if (is_u(etmp))
344.  	    Strcat(wholebuf, verb);
345.  	else
346.  	    Strcat(wholebuf, vtense((char *)0, verb));
347.  	return(wholebuf);
348.  }
349.  
350.  /*
351.   * Simple-minded "can it be here?" routine
352.   */
353.  
354.  STATIC_OVL boolean
355.  e_survives_at(etmp, x, y)
356.  struct entity *etmp;
357.  int x, y;
358.  {
359.  	if (noncorporeal(etmp->edata))
360.  		return(TRUE);
361.  	if (is_pool(x, y))
362.  		return (boolean)((is_u(etmp) &&
363.  				(Wwalking || Amphibious || Swimming ||
364.  				Flying || Levitation)) ||
365.  			is_swimmer(etmp->edata) || is_flyer(etmp->edata) ||
366.  			is_floater(etmp->edata));
367.  	/* must force call to lava_effects in e_died if is_u */
368.  	if (is_lava(x, y))
369.  		return (boolean)((is_u(etmp) && (Levitation || Flying)) ||
370.  			    likes_lava(etmp->edata) || is_flyer(etmp->edata));
371.  	if (is_db_wall(x, y))
372.  		return((boolean)(is_u(etmp) ? Passes_walls :
373.  			passes_walls(etmp->edata)));
374.  	return(TRUE);
375.  }
376.  
377.  STATIC_OVL void
378.  e_died(etmp, dest, how)
379.  struct entity *etmp;
380.  int dest, how;
381.  {
382.  	if (is_u(etmp)) {
383.  		if (how == DROWNING) {
384.  			killer = 0;	/* drown() sets its own killer */
385.  			(void) drown();
386.  		} else if (how == BURNING) {
387.  			killer = 0;	/* lava_effects() sets its own killer */
388.  			(void) lava_effects();
389.  		} else {
390.  			coord xy;
391.  
392.  			/* use more specific killer if specified */
393.  			if (!killer) {
394.  			    killer_format = KILLED_BY_AN;
395.  			    killer = "falling drawbridge";
396.  			}
397.  			done(how);
398.  			/* So, you didn't die */
399.  			if (!e_survives_at(etmp, etmp->ex, etmp->ey)) {
400.  			    if (enexto(&xy, etmp->ex, etmp->ey, etmp->edata)) {
401.  				pline("A %s force teleports you away...",
402.  				      Hallucination ? "normal" : "strange");
403.  				teleds(xy.x, xy.y);
404.  			    }
405.  			    /* otherwise on top of the drawbridge is the
406.  			     * only viable spot in the dungeon, so stay there
407.  			     */
408.  			}
409.  		}
410.  		/* we might have crawled out of the moat to survive */
411.  		etmp->ex = u.ux,  etmp->ey = u.uy;
412.  	} else {
413.  		killer = 0;
414.  		/* fake "digested to death" damage-type suppresses corpse */
415.  #define mk_message(dest) ((dest & 1) ? "" : (char *)0)
416.  #define mk_corpse(dest)  ((dest & 2) ? AD_DGST : AD_PHYS)
417.  		/* if monsters are moving, one of them caused the destruction */
418.  		if (flags.mon_moving)
419.  		    monkilled(etmp->emon, mk_message(dest), mk_corpse(dest));
420.  		else		/* you caused it */
421.  		    xkilled(etmp->emon, dest);
422.  		etmp->edata = (struct permonst *)0;
423.  #undef mk_message
424.  #undef mk_corpse
425.  	}
426.  }
427.  
428.  
429.  /*
430.   * These are never directly affected by a bridge or portcullis.
431.   */
432.  
433.  STATIC_OVL boolean
434.  automiss(etmp)
435.  struct entity *etmp;
436.  {
437.  	return (boolean)((is_u(etmp) ? Passes_walls :
438.  			passes_walls(etmp->edata)) || noncorporeal(etmp->edata));
439.  }
440.  
441.  /*
442.   * Does falling drawbridge or portcullis miss etmp?
443.   */
444.  
445.  STATIC_OVL boolean
446.  e_missed(etmp, chunks)
447.  struct entity *etmp;
448.  boolean chunks;
449.  {
450.  	int misses;
451.  
452.  #ifdef D_DEBUG
453.  	if (chunks)
454.  		pline("Do chunks miss?");
455.  #endif
456.  	if (automiss(etmp))
457.  		return(TRUE);
458.  
459.  	if (is_flyer(etmp->edata) &&
460.  	    (is_u(etmp)? !Sleeping :
461.  	     (etmp->emon->mcanmove && !etmp->emon->msleeping)))
462.  						 /* flying requires mobility */
463.  		misses = 5;	/* out of 8 */
464.  	else if (is_floater(etmp->edata) ||
465.  		    (is_u(etmp) && Levitation))	 /* doesn't require mobility */
466.  		misses = 3;
467.  	else if (chunks && is_pool(etmp->ex, etmp->ey))
468.  		misses = 2;				    /* sitting ducks */
469.  	else
470.  		misses = 0;
471.  
472.  	if (is_db_wall(etmp->ex, etmp->ey))
473.  		misses -= 3;				    /* less airspace */
474.  
475.  #ifdef D_DEBUG
476.  	pline("Miss chance = %d (out of 8)", misses);
477.  #endif
478.  
479.  	return((boolean)((misses >= rnd(8))? TRUE : FALSE));
480.  }
481.  
482.  /*
483.   * Can etmp jump from death?
484.   */
485.  
486.  STATIC_OVL boolean
487.  e_jumps(etmp)
488.  struct entity *etmp;
489.  {
490.  	int tmp = 4;		/* out of 10 */
491.  
492.  	if (is_u(etmp)? (Sleeping || Fumbling) :
493.  		        (!etmp->emon->mcanmove || etmp->emon->msleeping ||
494.  			 !etmp->edata->mmove   || etmp->emon->wormno))
495.  		return(FALSE);
496.  
497.  	if (is_u(etmp)? Confusion : etmp->emon->mconf)
498.  		tmp -= 2;
499.  
500.  	if (is_u(etmp)? Stunned : etmp->emon->mstun)
501.  		tmp -= 3;
502.  
503.  	if (is_db_wall(etmp->ex, etmp->ey))
504.  		tmp -= 2;			    /* less room to maneuver */
505.  
506.  #ifdef D_DEBUG
507.  	pline("%s to jump (%d chances in 10)", E_phrase(etmp, "try"), tmp);
508.  #endif
509.  	return((boolean)((tmp >= rnd(10))? TRUE : FALSE));
510.  }
511.  
512.  STATIC_OVL void
513.  do_entity(etmp)
514.  struct entity *etmp;
515.  {
516.  	int newx, newy, at_portcullis, oldx, oldy;
517.  	boolean must_jump = FALSE, relocates = FALSE, e_inview;
518.  	struct rm *crm;
519.  
520.  	if (!etmp->edata)
521.  		return;
522.  
523.  	e_inview = e_canseemon(etmp);
524.  	oldx = etmp->ex;
525.  	oldy = etmp->ey;
526.  	at_portcullis = is_db_wall(oldx, oldy);
527.  	crm = &levl[oldx][oldy];
528.  
529.  	if (automiss(etmp) && e_survives_at(etmp, oldx, oldy)) {
530.  		if (e_inview && (at_portcullis || IS_DRAWBRIDGE(crm->typ)))
531.  			pline_The("%s passes through %s!",
532.  			      at_portcullis ? "portcullis" : "drawbridge",
533.  			      e_nam(etmp));
534.  		return;
535.  	}
536.  	if (e_missed(etmp, FALSE)) {
537.  		if (at_portcullis)
538.  			pline_The("portcullis misses %s!",
539.  			      e_nam(etmp));
540.  #ifdef D_DEBUG
541.  		else
542.  			pline_The("drawbridge misses %s!",
543.  			      e_nam(etmp));
544.  #endif
545.  		if (e_survives_at(etmp, oldx, oldy))
546.  			return;
547.  		else {
548.  #ifdef D_DEBUG
549.  			pline("Mon can't survive here");
550.  #endif
551.  			if (at_portcullis)
552.  				must_jump = TRUE;
553.  			else
554.  				relocates = TRUE; /* just ride drawbridge in */
555.  		}
556.  	} else {
557.  		if (crm->typ == DRAWBRIDGE_DOWN) {
558.  			pline("%s crushed underneath the drawbridge.",
559.  			      E_phrase(etmp, "are"));		  /* no jump */
560.  			e_died(etmp, e_inview? 3 : 2, CRUSHING);/* no corpse */
561.  			return;   /* Note: Beyond this point, we know we're  */
562.  		}		  /* not at an opened drawbridge, since all  */
563.  		must_jump = TRUE; /* *missable* creatures survive on the     */
564.  	}			  /* square, and all the unmissed ones die.  */
565.  	if (must_jump) {
566.  	    if (at_portcullis) {
567.  		if (e_jumps(etmp)) {
568.  		    relocates = TRUE;
569.  #ifdef D_DEBUG
570.  		    pline("Jump succeeds!");
571.  #endif
572.  		} else {
573.  		    if (e_inview)
574.  			pline("%s crushed by the falling portcullis!",
575.  			      E_phrase(etmp, "are"));
576.  		    else if (flags.soundok)
577.  			You_hear("a crushing sound.");
578.  		    e_died(etmp, e_inview? 3 : 2, CRUSHING);
579.  		    /* no corpse */
580.  		    return;
581.  		}
582.  	    } else { /* tries to jump off bridge to original square */
583.  		relocates = !e_jumps(etmp);
584.  #ifdef D_DEBUG
585.  		pline("Jump %s!", (relocates)? "fails" : "succeeds");
586.  #endif
587.  	    }
588.  	}
589.  
590.  /*
591.   * Here's where we try to do relocation.  Assumes that etmp is not arriving
592.   * at the portcullis square while the drawbridge is falling, since this square
593.   * would be inaccessible (i.e. etmp started on drawbridge square) or
594.   * unnecessary (i.e. etmp started here) in such a situation.
595.   */
596.  #ifdef D_DEBUG
597.  	pline("Doing relocation.");
598.  #endif
599.  	newx = oldx;
600.  	newy = oldy;
601.  	(void)find_drawbridge(&newx, &newy);
602.  	if ((newx == oldx) && (newy == oldy))
603.  		get_wall_for_db(&newx, &newy);
604.  #ifdef D_DEBUG
605.  	pline("Checking new square for occupancy.");
606.  #endif
607.  	if (relocates && (e_at(newx, newy))) {
608.  
609.  /*
610.   * Standoff problem:  one or both entities must die, and/or both switch
611.   * places.  Avoid infinite recursion by checking first whether the other
612.   * entity is staying put.  Clean up if we happen to move/die in recursion.
613.   */
614.  		struct entity *other;
615.  
616.  		other = e_at(newx, newy);
617.  #ifdef D_DEBUG
618.  		pline("New square is occupied by %s", e_nam(other));
619.  #endif
620.  		if (e_survives_at(other, newx, newy) && automiss(other)) {
621.  			relocates = FALSE;	      /* "other" won't budge */
622.  #ifdef D_DEBUG
623.  			pline("%s suicide.", E_phrase(etmp, "commit"));
624.  #endif
625.  		} else {
626.  
627.  #ifdef D_DEBUG
628.  			pline("Handling %s", e_nam(other));
629.  #endif
630.  			while ((e_at(newx, newy) != 0) &&
631.  			       (e_at(newx, newy) != etmp))
632.  				do_entity(other);
633.  #ifdef D_DEBUG
634.  			pline("Checking existence of %s", e_nam(etmp));
635.  			wait_synch();
636.  #endif
637.  			if (e_at(oldx, oldy) != etmp) {
638.  #ifdef D_DEBUG
639.  			    pline("%s moved or died in recursion somewhere",
640.  				  E_phrase(etmp, "have"));
641.  			    wait_synch();
642.  #endif
643.  			    return;
644.  			}
645.  		}
646.  	}
647.  	if (relocates && !e_at(newx, newy)) {/* if e_at() entity = worm tail */
648.  #ifdef D_DEBUG
649.  		pline("Moving %s", e_nam(etmp));
650.  #endif
651.  		if (!is_u(etmp)) {
652.  			remove_monster(etmp->ex, etmp->ey);
653.  			place_monster(etmp->emon, newx, newy);
654.  			update_monster_region(etmp->emon);
655.  		} else {
656.  			u.ux = newx;
657.  			u.uy = newy;
658.  		}
659.  		etmp->ex = newx;
660.  		etmp->ey = newy;
661.  		e_inview = e_canseemon(etmp);
662.  	}
663.  #ifdef D_DEBUG
664.  	pline("Final disposition of %s", e_nam(etmp));
665.  	wait_synch();
666.  #endif
667.  	if (is_db_wall(etmp->ex, etmp->ey)) {
668.  #ifdef D_DEBUG
669.  		pline("%s in portcullis chamber", E_phrase(etmp, "are"));
670.  		wait_synch();
671.  #endif
672.  		if (e_inview) {
673.  			if (is_u(etmp)) {
674.  				You("tumble towards the closed portcullis!");
675.  				if (automiss(etmp))
676.  					You("pass through it!");
677.  				else
678.  					pline_The("drawbridge closes in...");
679.  			} else
680.  				pline("%s behind the drawbridge.",
681.  				      E_phrase(etmp, "disappear"));
682.  		}
683.  		if (!e_survives_at(etmp, etmp->ex, etmp->ey)) {
684.  			killer_format = KILLED_BY_AN;
685.  			killer = "closing drawbridge";
686.  			e_died(etmp, 0, CRUSHING);	       /* no message */
687.  			return;
688.  		}
689.  #ifdef D_DEBUG
690.  		pline("%s in here", E_phrase(etmp, "survive"));
691.  #endif
692.  	} else {
693.  #ifdef D_DEBUG
694.  		pline("%s on drawbridge square", E_phrase(etmp, "are"));
695.  #endif
696.  		if (is_pool(etmp->ex, etmp->ey) && !e_inview)
697.  			if (flags.soundok)
698.  				You_hear("a splash.");
699.  		if (e_survives_at(etmp, etmp->ex, etmp->ey)) {
700.  			if (e_inview && !is_flyer(etmp->edata) &&
701.  			    !is_floater(etmp->edata))
702.  				pline("%s from the bridge.",
703.  				      E_phrase(etmp, "fall"));
704.  			return;
705.  		}
706.  #ifdef D_DEBUG
707.  		pline("%s cannot survive on the drawbridge square",Enam(etmp));
708.  #endif
709.  		if (is_pool(etmp->ex, etmp->ey) || is_lava(etmp->ex, etmp->ey))
710.  		    if (e_inview && !is_u(etmp)) {
711.  			/* drown() will supply msgs if nec. */
712.  			boolean lava = is_lava(etmp->ex, etmp->ey);
713.  
714.  			if (Hallucination)
715.  			    pline("%s the %s and disappears.",
716.  				  E_phrase(etmp, "drink"),
717.  				  lava ? "lava" : "moat");
718.  			else
719.  			    pline("%s into the %s.",
720.  				  E_phrase(etmp, "fall"),
721.  				  lava ? "lava" : "moat");
722.  		    }
723.  		killer_format = NO_KILLER_PREFIX;
724.  		killer = "fell from a drawbridge";
725.  		e_died(etmp, e_inview ? 3 : 2,      /* CRUSHING is arbitrary */
726.  		       (is_pool(etmp->ex, etmp->ey)) ? DROWNING :
727.  		       (is_lava(etmp->ex, etmp->ey)) ? BURNING :
728.  						       CRUSHING); /*no corpse*/
729.  		return;
730.  	}
731.  }
732.  
733.  /*
734.   * Close the drawbridge located at x,y
735.   */
736.  
737.  void
738.  close_drawbridge(x,y)
739.  int x,y;
740.  {
741.  	register struct rm *lev1, *lev2;
742.  	struct trap *t;
743.  	int x2, y2;
744.  
745.  	lev1 = &levl[x][y];
746.  	if (lev1->typ != DRAWBRIDGE_DOWN) return;
747.  	x2 = x; y2 = y;
748.  	get_wall_for_db(&x2,&y2);
749.  	if (cansee(x,y) || cansee(x2,y2))
750.  		You("see a drawbridge %s up!",
751.  		    (((u.ux == x || u.uy == y) && !Underwater) ||
752.  		     distu(x2,y2) < distu(x,y)) ? "coming" : "going");
753.  	lev1->typ = DRAWBRIDGE_UP;
754.  	lev2 = &levl[x2][y2];
755.  	lev2->typ = DBWALL;
756.  	switch (lev1->drawbridgemask & DB_DIR) {
757.  		case DB_NORTH:
758.  		case DB_SOUTH:
759.  			lev2->horizontal = TRUE;
760.  			break;
761.  		case DB_WEST:
762.  		case DB_EAST:
763.  			lev2->horizontal = FALSE;
764.  			break;
765.  	}
766.  	lev2->wall_info = W_NONDIGGABLE;
767.  	set_entity(x, y, &(occupants[0]));
768.  	set_entity(x2, y2, &(occupants[1]));
769.  	do_entity(&(occupants[0]));		/* Do set_entity after first */
770.  	set_entity(x2, y2, &(occupants[1]));	/* do_entity for worm tail */
771.  	do_entity(&(occupants[1]));
772.  	if(OBJ_AT(x,y) && flags.soundok)
773.  	    You_hear("smashing and crushing.");
774.  	(void) revive_nasty(x,y,(char *)0);
775.  	(void) revive_nasty(x2,y2,(char *)0);
776.  	delallobj(x, y);
777.  	delallobj(x2, y2);
778.  	if ((t = t_at(x, y)) != 0) deltrap(t);
779.  	if ((t = t_at(x2, y2)) != 0) deltrap(t);
780.  	newsym(x, y);
781.  	newsym(x2, y2);
782.  	block_point(x2,y2);	/* vision */
783.  }
784.  
785.  /*
786.   * Open the drawbridge located at x,y
787.   */
788.  
789.  void
790.  open_drawbridge(x,y)
791.  int x,y;
792.  {
793.  	register struct rm *lev1, *lev2;
794.  	struct trap *t;
795.  	int x2, y2;
796.  
797.  	lev1 = &levl[x][y];
798.  	if (lev1->typ != DRAWBRIDGE_UP) return;
799.  	x2 = x; y2 = y;
800.  	get_wall_for_db(&x2,&y2);
801.  	if (cansee(x,y) || cansee(x2,y2))
802.  		You("see a drawbridge %s down!",
803.  		    (distu(x2,y2) < distu(x,y)) ? "going" : "coming");
804.  	lev1->typ = DRAWBRIDGE_DOWN;
805.  	lev2 = &levl[x2][y2];
806.  	lev2->typ = DOOR;
807.  	lev2->doormask = D_NODOOR;
808.  	set_entity(x, y, &(occupants[0]));
809.  	set_entity(x2, y2, &(occupants[1]));
810.  	do_entity(&(occupants[0]));		/* do set_entity after first */
811.  	set_entity(x2, y2, &(occupants[1]));	/* do_entity for worm tails */
812.  	do_entity(&(occupants[1]));
813.  	(void) revive_nasty(x,y,(char *)0);
814.  	delallobj(x, y);
815.  	if ((t = t_at(x, y)) != 0) deltrap(t);
816.  	if ((t = t_at(x2, y2)) != 0) deltrap(t);
817.  	newsym(x, y);
818.  	newsym(x2, y2);
819.  	unblock_point(x2,y2);	/* vision */
820.  	if (Is_stronghold(&u.uz)) u.uevent.uopened_dbridge = TRUE;
821.  }
822.  
823.  /*
824.   * Let's destroy the drawbridge located at x,y
825.   */
826.  
827.  void
828.  destroy_drawbridge(x,y)
829.  int x,y;
830.  {
831.  	register struct rm *lev1, *lev2;
832.  	struct trap *t;
833.  	int x2, y2;
834.  	boolean e_inview;
835.  	struct entity *etmp1 = &(occupants[0]), *etmp2 = &(occupants[1]);
836.  
837.  	lev1 = &levl[x][y];
838.  	if (!IS_DRAWBRIDGE(lev1->typ))
839.  		return;
840.  	x2 = x; y2 = y;
841.  	get_wall_for_db(&x2,&y2);
842.  	lev2 = &levl[x2][y2];
843.  	if ((lev1->drawbridgemask & DB_UNDER) == DB_MOAT ||
844.  	    (lev1->drawbridgemask & DB_UNDER) == DB_LAVA) {
845.  		struct obj *otmp;
846.  		boolean lava = (lev1->drawbridgemask & DB_UNDER) == DB_LAVA;
847.  		if (lev1->typ == DRAWBRIDGE_UP) {
848.  			if (cansee(x2,y2))
849.  			    pline_The("portcullis of the drawbridge falls into the %s!",
850.  				  lava ? "lava" : "moat");
851.  			else if (flags.soundok)
852.  				You_hear("a loud *SPLASH*!");
853.  		} else {
854.  			if (cansee(x,y))
855.  			    pline_The("drawbridge collapses into the %s!",
856.  				  lava ? "lava" : "moat");
857.  			else if (flags.soundok)
858.  				You_hear("a loud *SPLASH*!");
859.  		}
860.  		lev1->typ = lava ? LAVAPOOL : MOAT;
861.  		lev1->drawbridgemask = 0;
862.  		if ((otmp = sobj_at(BOULDER,x,y)) != 0) {
863.  		    obj_extract_self(otmp);
864.  		    (void) flooreffects(otmp,x,y,"fall");
865.  		}
866.  	} else {
867.  		if (cansee(x,y))
868.  			pline_The("drawbridge disintegrates!");
869.  		else
870.  			You_hear("a loud *CRASH*!");
871.  		lev1->typ =
872.  			((lev1->drawbridgemask & DB_ICE) ? ICE : ROOM);
873.  		lev1->icedpool =
874.  			((lev1->drawbridgemask & DB_ICE) ? ICED_MOAT : 0);
875.  	}
876.  	wake_nearto(x, y, 500);
877.  	lev2->typ = DOOR;
878.  	lev2->doormask = D_NODOOR;
879.  	if ((t = t_at(x, y)) != 0) deltrap(t);
880.  	if ((t = t_at(x2, y2)) != 0) deltrap(t);
881.  	newsym(x,y);
882.  	newsym(x2,y2);
883.  	if (!does_block(x2,y2,lev2)) unblock_point(x2,y2);	/* vision */
884.  	if (Is_stronghold(&u.uz)) u.uevent.uopened_dbridge = TRUE;
885.  
886.  	set_entity(x2, y2, etmp2); /* currently only automissers can be here */
887.  	if (etmp2->edata) {
888.  		e_inview = e_canseemon(etmp2);
889.  		if (!automiss(etmp2)) {
890.  			if (e_inview)
891.  				pline("%s blown apart by flying debris.",
892.  				      E_phrase(etmp2, "are"));
893.  			killer_format = KILLED_BY_AN;
894.  			killer = "exploding drawbridge";
895.  			e_died(etmp2, e_inview? 3 : 2, CRUSHING); /*no corpse*/
896.  		}	     /* nothing which is vulnerable can survive this */
897.  	}
898.  	set_entity(x, y, etmp1);
899.  	if (etmp1->edata) {
900.  		e_inview = e_canseemon(etmp1);
901.  		if (e_missed(etmp1, TRUE)) {
902.  #ifdef D_DEBUG
903.  			pline("%s spared!", E_phrase(etmp1, "are"));
904.  #endif
905.  		} else {
906.  			if (e_inview) {
907.  			    if (!is_u(etmp1) && Hallucination)
908.  				pline("%s into some heavy metal!",
909.  				      E_phrase(etmp1, "get"));
910.  			    else
911.  				pline("%s hit by a huge chunk of metal!",
912.  				      E_phrase(etmp1, "are"));
913.  			} else {
914.  			    if (flags.soundok && !is_u(etmp1) && !is_pool(x,y))
915.  				You_hear("a crushing sound.");
916.  #ifdef D_DEBUG
917.  			    else
918.  				pline("%s from shrapnel",
919.  				      E_phrase(etmp1, "die"));
920.  #endif
921.  			}
922.  			killer_format = KILLED_BY_AN;
923.  			killer = "collapsing drawbridge";
924.  			e_died(etmp1, e_inview? 3 : 2, CRUSHING); /*no corpse*/
925.  			if(lev1->typ == MOAT) do_entity(etmp1);
926.  		}
927.  	}
928.  }
929.  
930.  #endif /* OVLB */
931.  
932.  /*dbridge.c*/

Also on Fandom

Random Wiki