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Comparing deliantra/server/server/monster.C (file contents):
Revision 1.55 by root, Sat Dec 27 07:50:05 2008 UTC vs.
Revision 1.72 by root, Fri Nov 6 12:27:06 2009 UTC

…		…
3	*	3	*
4	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team	4	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team	5	* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6	* Copyright (©) 1992,2007 Frank Tore Johansen	6	* Copyright (©) 1992,2007 Frank Tore Johansen
7	*	7	*
8	* Deliantra is free software: you can redistribute it and/or modify	8	* Deliantra is free software: you can redistribute it and/or modify it under
9	* it under the terms of the GNU General Public License as published by	9	* the terms of the Affero GNU General Public License as published by the
10	* the Free Software Foundation, either version 3 of the License, or	10	* Free Software Foundation, either version 3 of the License, or (at your
11	* (at your option) any later version.	11	* option) any later version.
12	*	12	*
13	* This program is distributed in the hope that it will be useful,	13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.	16	* GNU General Public License for more details.
17	*	17	*
18	* You should have received a copy of the GNU General Public License	18	* You should have received a copy of the Affero GNU General Public License
19	* along with this program. If not, see <http://www.gnu.org/licenses/>.	19	* and the GNU General Public License along with this program. If not, see
		20	* <http://www.gnu.org/licenses/>.
20	*	21	*
21	* The authors can be reached via e-mail to <support@deliantra.net>	22	* The authors can be reached via e-mail to <support@deliantra.net>
22	*/	23	*/
		24
		25	//+GPL
23		26
24	#include <global.h>	27	#include <global.h>
25	#include <sproto.h>	28	#include <sproto.h>
26	#include <spells.h>	29	#include <spells.h>
27	#include <skills.h>	30	#include <skills.h>
…		…
46	npc->enemy = NULL;	49	npc->enemy = NULL;
47	else if (npc->enemy == NULL)	50	else if (npc->enemy == NULL)
48	npc->enemy = npc->owner->enemy;	51	npc->enemy = npc->owner->enemy;
49	}	52	}
50		53
51	/* periodically, a monster mayu change its target. Also, if the object	54	/* periodically, a monster may change its target. Also, if the object
52	* has been destroyed, etc, clear the enemy.	55	* has been destroyed, etc, clear the enemy.
53	* TODO: this should be changed, because it invokes to attack forced or	56	* TODO: this should be changed, because it invokes to attack forced or
54	* attacked monsters to leave the attacker alone, before it is destroyed	57	* attacked monsters to leave the attacker alone, before it is destroyed
55	*/	58	*/
56	/* i had removed the random target leave, this invokes problems with friendly	59	/* I had removed the random target leave, this invokes problems with friendly
57	* objects, getting attacked and defending herself - they don't try to attack	60	* objects, getting attacked and defending herself - they don't try to attack
58	* again then but perhaps get attack on and on	61	* again then but perhaps get attack on and on
59	* If we include a aggravated flag in , we can handle evil vs evil and good vs good	62	* If we include a aggravated flag in , we can handle evil vs evil and good vs good
60	* too. */	63	* too. */
61		64
…		…
65	* the grouping checks are. Code is the same.	68	* the grouping checks are. Code is the same.
66	*/	69	*/
67	if (QUERY_FLAG (npc->enemy, FLAG_REMOVED) ||	70	if (QUERY_FLAG (npc->enemy, FLAG_REMOVED) ||
68	QUERY_FLAG (npc->enemy, FLAG_FREED) ||	71	QUERY_FLAG (npc->enemy, FLAG_FREED) ||
69	!on_same_map (npc, npc->enemy) || npc == npc->enemy || QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (npc->enemy, FLAG_NEUTRAL))	72	!on_same_map (npc, npc->enemy) || npc == npc->enemy || QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (npc->enemy, FLAG_NEUTRAL))
70	npc->enemy = NULL;	73	npc->enemy = 0;
71		74
72	else if (QUERY_FLAG (npc, FLAG_FRIENDLY) && ((QUERY_FLAG (npc->enemy, FLAG_FRIENDLY)	75	else if (QUERY_FLAG (npc, FLAG_FRIENDLY) && ((QUERY_FLAG (npc->enemy, FLAG_FRIENDLY)
73	&& !(should_arena_attack (npc, npc->owner, npc->enemy)))	76	&& !(should_arena_attack (npc, npc->owner, npc->enemy)))
74	|| ((npc->enemy->type == PLAYER) && !(should_arena_attack (npc, npc->owner, npc->enemy)))	77	|| ((npc->enemy->type == PLAYER) && !(should_arena_attack (npc, npc->owner, npc->enemy)))
75	|| npc->enemy == npc->owner))	78	|| npc->enemy == npc->owner))
76	npc->enemy = NULL;	79	npc->enemy = 0;
77		80
78		81
79	else if (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (npc->enemy, FLAG_FRIENDLY) && npc->enemy->type != PLAYER))	82	else if (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (npc->enemy, FLAG_FRIENDLY) && npc->enemy->type != PLAYER))
80	npc->enemy = NULL;	83	npc->enemy = 0;
81		84
82	/* I've noticed that pets could sometimes get an arrow as the	85	/* I've noticed that pets could sometimes get an arrow as the
83	* target enemy - this code below makes sure the enemy is something	86	* target enemy - this code below makes sure the enemy is something
84	* that should be attacked. My guess is that the arrow hits	87	* that should be attacked. My guess is that the arrow hits
85	* the creature/owner, and so the creature then takes that	88	* the creature/owner, and so the creature then takes that
…		…
87	*/	90	*/
88	else if (!QUERY_FLAG (npc->enemy, FLAG_MONSTER)	91	else if (!QUERY_FLAG (npc->enemy, FLAG_MONSTER)
89	&& !QUERY_FLAG (npc->enemy, FLAG_GENERATOR)	92	&& !QUERY_FLAG (npc->enemy, FLAG_GENERATOR)
90	&& npc->enemy->type != PLAYER	93	&& npc->enemy->type != PLAYER
91	&& npc->enemy->type != GOLEM)	94	&& npc->enemy->type != GOLEM)
92	npc->enemy = NULL;	95	npc->enemy = 0;
93
94	}	96	}
95		97
96	return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : NULL;	98	return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : 0;
97	}	99	}
98		100
99	/* Returns the nearest living creature (monster or generator).	101	/* Returns the nearest living creature (monster or generator).
100	* Modified to deal with tiled maps properly.	102	* Modified to deal with tiled maps properly.
101	* Also fixed logic so that monsters in the lower directions were more	103	* Also fixed logic so that monsters in the lower directions were more
…		…
236	{	238	{
237	/* Trim work - if no enemy, no need to do anything below */	239	/* Trim work - if no enemy, no need to do anything below */
238	if (!enemy)	240	if (!enemy)
239	return 0;	241	return 0;
240		242
		243	if (!op->flag [FLAG_SLEEP])
		244	return 1;
		245
241	int radius = max (op->stats.Wis, MIN_MON_RADIUS);	246	int radius = max (op->stats.Wis, MIN_MON_RADIUS);
242		247
243	if (op->flag [FLAG_BLIND])	248	if (op->flag [FLAG_BLIND])
244	/* blinded monsters can only find nearby objects to attack */	249	/* blinded monsters can only find nearby objects to attack */
245	radius = MIN_MON_RADIUS;	250	radius = MIN_MON_RADIUS;
…		…
251	* and has an enemy. If the enemy has no carried light (or isnt	256	* and has an enemy. If the enemy has no carried light (or isnt
252	* glowing!) then the monster has trouble finding the enemy.	257	* glowing!) then the monster has trouble finding the enemy.
253	* Remember we already checked to see if the monster can see in	258	* Remember we already checked to see if the monster can see in
254	* the dark. */	259	* the dark. */
255	radius = min (radius, MIN_MON_RADIUS + MAX_DARKNESS - op->map->darklevel ());	260	radius = min (radius, MIN_MON_RADIUS + MAX_DARKNESS - op->map->darklevel ());
256	else if (!op->flag [FLAG_SLEEP])
257	return 1;
258		261
259	if (enemy->flag [FLAG_STEALTH])	262	if (enemy->flag [FLAG_STEALTH])
260	radius = radius / 2 + 1;	263	radius = radius / 2 + 1;
261		264
262	/* enemy should already be on this map, so don't really need to check	265	/* enemy should already be on this map, so don't really need to check
…		…
281		284
282	return 0;	285	return 0;
283	}	286	}
284		287
285	/*	288	/*
286	* Move-monster returns 1 if the object has been freed, otherwise 0.	289	* monster_can_pick(): If the monster is interested in picking up
		290	* the item, then return 0. Otherwise 0.
		291	* Instead of pick_up, flags for "greed", etc, should be used.
		292	* I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
287	*/	293	*/
288	int	294	static int
289	move_monster (object *op)	295	monster_can_pick (object *monster, object *item)
290	{	296	{
291	int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */	297	int flag = 0;
292	object *owner, *enemy, *part, *oph = op;	298	int i;
293	rv_vector rv;
294		299
295	/* Monsters not on maps don't do anything. These monsters are things	300	if (!can_pick (monster, item))
296	* Like royal guards in city dwellers inventories.	301	return 0;
		302
		303	if (QUERY_FLAG (item, FLAG_UNPAID))
		304	return 0;
		305
		306	if (monster->pick_up & 64) /* All */
		307	flag = 1;
		308
		309	else
		310	switch (item->type)
		311	{
		312	case MONEY:
		313	case GEM:
		314	flag = monster->pick_up & 2;
		315	break;
		316
		317	case FOOD:
		318	flag = monster->pick_up & 4;
		319	break;
		320
		321	case WEAPON:
		322	flag = (monster->pick_up & 8) || QUERY_FLAG (monster, FLAG_USE_WEAPON);
		323	break;
		324
		325	case ARMOUR:
		326	case SHIELD:
		327	case HELMET:
		328	case BOOTS:
		329	case GLOVES:
		330	case GIRDLE:
		331	flag = (monster->pick_up & 16) || QUERY_FLAG (monster, FLAG_USE_ARMOUR);
		332	break;
		333
		334	case SKILL:
		335	flag = QUERY_FLAG (monster, FLAG_CAN_USE_SKILL);
		336	break;
		337
		338	case RING:
		339	flag = QUERY_FLAG (monster, FLAG_USE_RING);
		340	break;
		341
		342	case WAND:
		343	case HORN:
		344	case ROD:
		345	flag = QUERY_FLAG (monster, FLAG_USE_RANGE);
		346	break;
		347
		348	case SPELLBOOK:
		349	flag = monster->arch && QUERY_FLAG (monster->arch, FLAG_CAST_SPELL);
		350	break;
		351
		352	case SCROLL:
		353	flag = QUERY_FLAG (monster, FLAG_USE_SCROLL);
		354	break;
		355
		356	case BOW:
		357	case ARROW:
		358	flag = QUERY_FLAG (monster, FLAG_USE_BOW);
		359	break;
		360	}
		361
		362	/* Simplistic check - if the monster has a location to equip it, he will
		363	* pick it up. Note that this doesn't handle cases where an item may
		364	* use several locations.
297	*/	365	*/
298	if (!op->map)	366	for (i = 0; i < NUM_BODY_LOCATIONS; i++)
		367	{
		368	if (monster->slot[i].info && item->slot[i].info)
		369	{
		370	flag = 1;
		371	break;
		372	}
		373	}
		374
		375	if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
299	return 0;	376	return 1;
300		377
301	/* for target facing, we copy this value here for fast access */	378	return 0;
302	if (oph->head) /* force update the head - one arch one pic */	379	}
303	oph = oph->head;
304		380
305	if (QUERY_FLAG (op, FLAG_NO_ATTACK)) /* we never ever attack */	381	/*
306	enemy = op->enemy = NULL;	382	* monster_check_pickup(): checks for items that monster can pick up.
307	else if ((enemy = find_enemy (op, &rv)))	383	*
308	/* we have an enemy, just tell him we want him dead */	384	* Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
309	enemy->attacked_by = op; /* our ptr */	385	* Each time the blob passes over some treasure, it will
		386	* grab it a.s.a.p.
		387	*
		388	* Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
		389	* to handle this.
		390	*
		391	* This function was seen be continueing looping at one point (tmp->below
		392	* became a recursive loop. It may be better to call monster_check_apply
		393	* after we pick everything up, since that function may call others which
		394	* affect stacking on this space.
		395	*/
		396	static void
		397	monster_check_pickup (object *monster)
		398	{
		399	object *tmp, *next;
310		400
311	/* generate hp, if applicable */	401	for (tmp = monster->below; tmp != NULL; tmp = next)
312	if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
313	{	402	{
314	/* last heal is in funny units. Dividing by speed puts	403	next = tmp->below;
315	* the regeneration rate on a basis of time instead of	404	if (monster_can_pick (monster, tmp))
316	* #moves the monster makes. The scaling by 8 is
317	* to capture 8th's of a hp fraction regens
318	*	405	{
319	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)	406	tmp->remove ();
320	* overflow might produce monsters with negative hp.	407	tmp = insert_ob_in_ob (tmp, monster);
		408	(void) monster_check_apply (monster, tmp);
		409	}
		410	/* We could try to re-establish the cycling, of the space, but probably
		411	* not a big deal to just bail out.
321	*/	412	*/
322		413	if (next && next->destroyed ())
323	op->last_heal += (int) ((float) (8 * op->stats.Con) / FABS (op->speed));
324	op->stats.hp = MIN ((sint32) op->stats.hp + op->last_heal / 32, op->stats.maxhp); /* causes Con/4 hp/tick */
325	op->last_heal %= 32;
326
327	/* So if the monster has gained enough HP that they are no longer afraid */
328	if (QUERY_FLAG (op, FLAG_RUN_AWAY) && op->stats.hp >= (signed short)(((float)op->run_away / 100.f) * (float)op->stats.maxhp))
329	CLEAR_FLAG (op, FLAG_RUN_AWAY);
330
331	if (op->stats.hp > op->stats.maxhp)
332	op->stats.hp = op->stats.maxhp;
333	}
334
335	/* generate sp, if applicable */
336	if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
337	{
338	/* last_sp is in funny units. Dividing by speed puts
339	* the regeneration rate on a basis of time instead of
340	* #moves the monster makes. The scaling by 8 is
341	* to capture 8th's of a sp fraction regens
342	*
343	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
344	* overflow might produce monsters with negative sp.
345	*/
346
347	op->last_sp += (int) ((float) (8 * op->stats.Pow) / fabsf (op->speed));
348	op->stats.sp = min (op->stats.sp + op->last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
349	op->last_sp %= 128;
350	}
351
352	/* this should probably get modified by many more values.
353	* (eg, creatures resistance to fear, level, etc. )
354	*/
355	if (QUERY_FLAG (op, FLAG_SCARED) && !(rndm (20)))
356	CLEAR_FLAG (op, FLAG_SCARED); /* Time to regain some "guts"... */
357
358	if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
359	return QUERY_FLAG (op, FLAG_FREED);
360
361	if (QUERY_FLAG (op, FLAG_SLEEP) || QUERY_FLAG (op, FLAG_BLIND) ||
362	((op->map->darklevel () > 0) && !QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
363	if (!check_wakeup (op, enemy, &rv))
364	return 0;
365
366	/* check if monster pops out of hidden spot */
367	if (op->flag [FLAG_HIDDEN])
368	do_hidden_move (op);
369
370	if (op->pick_up)
371	monster_check_pickup (op);
372
373	if (op->will_apply)
374	monster_apply_below (op); /* Check for items to apply below */
375
376	/* If we don't have an enemy, do special movement or the like */
377	if (!enemy)
378	{
379	if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
380	{
381	op->drop_and_destroy ();
382	return 1;	414	return;
		415	}
		416	}
		417
		418	/*
		419	* monster_apply_below():
		420	* Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
		421	* eager to apply things, encounters something apply-able,
		422	* then make him apply it
		423	*/
		424	static void
		425	monster_apply_below (object *monster)
		426	{
		427	object *tmp, *next;
		428
		429	for (tmp = monster->below; tmp != NULL; tmp = next)
		430	{
		431	next = tmp->below;
		432	switch (tmp->type)
383	}	433	{
384		434	case T_HANDLE:
385	/* Probably really a bug for a creature to have both	435	case TRIGGER:
386	* stand still and a movement type set.	436	if (monster->will_apply & 1)
387	*/	437	manual_apply (monster, tmp, 0);
388	if (!QUERY_FLAG (op, FLAG_STAND_STILL))
389	{
390	if (op->attack_movement & HI4)
391	{
392	switch (op->attack_movement & HI4)
393	{
394	case (PETMOVE):
395	pet_move (op);
396	break;
397
398	case (CIRCLE1):
399	circ1_move (op);
400	break;
401
402	case (CIRCLE2):
403	circ2_move (op);
404	break;
405
406	case (PACEV):
407	pace_movev (op);
408	break;
409
410	case (PACEH):
411	pace_moveh (op);
412	break;
413
414	case (PACEV2):
415	pace2_movev (op);
416	break;
417
418	case (PACEH2):
419	pace2_moveh (op);
420	break;
421
422	case (RANDO):
423	rand_move (op);
424	break;
425
426	case (RANDO2):
427	move_randomly (op);
428	break;
429	}
430
431	return 0;
432	}
433	else if (QUERY_FLAG (op, FLAG_RANDOM_MOVE))
434	move_randomly (op);
435	} /* stand still */
436
437	return 0;
438	} /* no enemy */
439
440	/* We have an enemy. Block immediately below is for pets */
441	if ((op->attack_movement & HI4) == PETMOVE
442	&& (owner = op->owner) != NULL
443	&& !on_same_map (op, owner)
444	&& !owner->flag [FLAG_REMOVED])
445	return follow_owner (op, owner);
446
447	/* doppleganger code to change monster facing to that of the nearest
448	* player. Hmm. The code is here, but no monster in the current
449	* arch set uses it.
450	*/
451	if (op->race && strcmp (op->race, "doppleganger") == 0)
452	{
453	op->face = enemy->face;
454	op->name = enemy->name;
455	}
456
457	/* Calculate range information for closest body part - this
458	* is used for the 'skill' code, which isn't that smart when
459	* it comes to figuring it out - otherwise, giants throw boulders
460	* into themselves.
461	*/
462	get_rangevector (op, enemy, &rv, 0);
463
464	/* Move the check for scared up here - if the monster was scared,
465	* we were not doing any of the logic below, so might as well save
466	* a few cpu cycles.
467	*/
468	if (!QUERY_FLAG (op, FLAG_SCARED))
469	{
470	rv_vector rv1;
471
472	/* now we test every part of an object .... this is a real ugly piece of code */
473	for (part = op; part; part = part->more)
474	{
475	get_rangevector (part, enemy, &rv1, 0x1);
476	dir = rv1.direction;
477
478	/* hm, not sure about this part - in original was a scared flag here too
479	* but that we test above... so can be old code here
480	*/
481	if (QUERY_FLAG (op, FLAG_RUN_AWAY))
482	dir = absdir (dir + 4);
483
484	if (QUERY_FLAG (op, FLAG_CONFUSED))
485	dir = absdir (dir + rndm (3) + rndm (3) - 2);
486
487	if (QUERY_FLAG (op, FLAG_CAST_SPELL) && !(rndm (3)))
488	if (monster_cast_spell (op, part, enemy, dir, &rv1))
489	return 0;
490
491	if (QUERY_FLAG (op, FLAG_READY_SCROLL) && !(rndm (3)))
492	if (monster_use_scroll (op, part, enemy, dir, &rv1))
493	return 0;
494
495	if (QUERY_FLAG (op, FLAG_READY_RANGE) && !(rndm (3)))
496	if (monster_use_range (op, part, enemy, dir))
497	return 0;
498
499	if (QUERY_FLAG (op, FLAG_READY_SKILL) && !(rndm (3)))
500	if (monster_use_skill (op, rv.part, enemy, rv.direction))
501	return 0;
502
503	if (QUERY_FLAG (op, FLAG_READY_BOW) && !(rndm (2)))
504	if (monster_use_bow (op, part, enemy, dir))
505	return 0;
506	} /* for processing of all parts */
507	} /* If not scared */
508
509	part = rv.part;
510	dir = rv.direction;
511
512	#if DEVEL
513	int sdir = 0;
514
515	for (int dir = 1; dir <= 8; ++dir)
516	{
517	mapxy pos (op); pos.move (dir);
518	if (pos.normalise ())
519	{
520	mapspace &ms = pos.ms ();
521
522	if (ms.smell > op->ms ().smell)
523	{
524	printf ("%s: found smell, following it, apparently (%d, %d)\n",& op->name,op->ms().smell,ms.smell);//D
525	op->ms ().smell = ms.smell - 1;
526	sdir = dir;
527
528	// perturbing the path might let the monster lose track,
529	// but it will also wide the actual path, spreading information
530	if (!rndm (20))
531	sdir += absdir (1 - rndm (2) * 2);
532	}
533	}
534	}
535
536	if (sdir)
537	dir = sdir;
538	else
539	// no better smell found, so assume the player jumped, and erase this smell
540	{if (op->ms ().smell) printf ("erasing smell %d\n", op->ms ().smell);//D
541	ordered_mapwalk_begin (op, -1, -1, 1, 1)
542	if (m)
543	m->at (nx, ny).smell = 0;
544	ordered_mapwalk_end
545	}//D
546
547	#endif
548
549	if (QUERY_FLAG (op, FLAG_SCARED) || QUERY_FLAG (op, FLAG_RUN_AWAY))
550	dir = absdir (dir + 4);
551
552	if (QUERY_FLAG (op, FLAG_CONFUSED))
553	dir = absdir (dir + rndm (3) + rndm (3) - 2);
554
555	pre_att_dir = dir; /* remember the original direction */
556
557	if ((op->attack_movement & LO4) && !QUERY_FLAG (op, FLAG_SCARED))
558	{
559	switch (op->attack_movement & LO4)
560	{
561	case DISTATT:
562	dir = dist_att (dir, op, enemy, part, &rv);
563	break;	438	break;
564		439
565	case RUNATT:	440	case TREASURE:
566	dir = run_att (dir, op, enemy, part, &rv);	441	if (monster->will_apply & 2)
		442	manual_apply (monster, tmp, 0);
567	break;	443	break;
568		444
569	case HITRUN:
570	dir = hitrun_att (dir, op, enemy);
571	break;
572
573	case WAITATT:
574	dir = wait_att (dir, op, enemy, part, &rv);
575	break;
576
577	case RUSH: /* default - monster normally moves towards player */
578	case ALLRUN:
579	break;
580
581	case DISTHIT:
582	dir = disthit_att (dir, op, enemy, part, &rv);
583	break;
584
585	case WAIT2:
586	dir = wait_att2 (dir, op, enemy, part, &rv);
587	break;
588
589	default:
590	LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
591	}
592	}
593
594	if (!dir)
595	return 0;
596
597	if (!QUERY_FLAG (op, FLAG_STAND_STILL))
598	{
599	if (move_object (op, dir)) /* Can the monster move directly toward player? */
600	{	445	}
601	/* elmex: Turn our monster after it moved if it has DISTATT attack */	446	if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
602	if ((op->attack_movement & LO4) == DISTATT)	447	break;
603	op->direction = pre_att_dir;
604
605	return 0;
606	}
607
608	if (QUERY_FLAG (op, FLAG_SCARED) || !can_hit (part, enemy, &rv) || QUERY_FLAG (op, FLAG_RUN_AWAY))
609	{
610	/* Try move around corners if !close */
611	int maxdiff = (QUERY_FLAG (op, FLAG_ONLY_ATTACK) || rndm (2)) ? 1 : 2;
612
613	for (diff = 1; diff <= maxdiff; diff++)
614	{
615	/* try different detours */
616	int m = 1 - rndm (2) * 2; /* Try left or right first? */
617
618	if (move_object (op, absdir (dir + diff * m)) || move_object (op, absdir (dir - diff * m)))
619	return 0;
620	}
621	}
622	} /* if monster is not standing still */
623
624	/* elmex: Turn our monster after it moved if it has DISTATT attack */
625	if ((op->attack_movement & LO4) == DISTATT)
626	op->direction = pre_att_dir;
627
628	/*
629	* Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
630	* direction if they can't move away.
631	*/
632	if (!QUERY_FLAG (op, FLAG_ONLY_ATTACK) && (QUERY_FLAG (op, FLAG_RUN_AWAY) || QUERY_FLAG (op, FLAG_SCARED)))
633	if (move_randomly (op))
634	return 0;
635
636	/*
637	* Try giving the monster a new enemy - the player that is closest
638	* to it. In this way, it won't just keep trying to get to a target
639	* that is inaccessible.
640	* This could be more clever - it should go through a list of several
641	* enemies, as it is now, you could perhaps get situations where there
642	* are two players flanking the monster at close distance, but which
643	* the monster can't get to, and a third one at a far distance that
644	* the monster could get to - as it is, the monster won't look at that
645	* third one.
646	*/
647	if (!QUERY_FLAG (op, FLAG_FRIENDLY) && enemy == op->enemy)
648	{	448	}
649	object *nearest_player = get_nearest_player (op);
650
651	if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
652	{
653	op->enemy = 0;
654	enemy = nearest_player;
655	}
656	}
657
658	if (!QUERY_FLAG (op, FLAG_SCARED) && can_hit (part, enemy, &rv))
659	{
660	/* The adjustement to wc that was here before looked totally bogus -
661	* since wc can in fact get negative, that would mean by adding
662	* the current wc, the creature gets better? Instead, just
663	* add a fixed amount - nasty creatures that are runny away should
664	* still be pretty nasty.
665	*/
666	if (QUERY_FLAG (op, FLAG_RUN_AWAY))
667	{
668	part->stats.wc += 10;
669	skill_attack (enemy, part, 0, NULL, NULL);
670	part->stats.wc -= 10;
671	}
672	else
673	skill_attack (enemy, part, 0, NULL, NULL);
674	} /* if monster is in attack range */
675
676	if (QUERY_FLAG (part, FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
677	return 1;
678
679	if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
680	{
681	op->drop_and_destroy ();
682	return 1;
683	}
684
685	return 0;
686	}
687
688	int
689	can_hit (object *ob1, object *ob2, rv_vector * rv)
690	{
691	object *more;
692	rv_vector rv1;
693
694	if (QUERY_FLAG (ob1, FLAG_CONFUSED) && !(rndm (3)))
695	return 0;
696
697	if (abs (rv->distance_x) < 2 && abs (rv->distance_y) < 2)
698	return 1;
699
700	/* check all the parts of ob2 - just because we can't get to
701	* its head doesn't mean we don't want to pound its feet
702	*/
703	for (more = ob2->more; more != NULL; more = more->more)
704	{
705	get_rangevector (ob1, more, &rv1, 0);
706	if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
707	return 1;
708	}
709
710	return 0;
711	}	449	}
712		450
713	/* Returns 1 is monster should cast spell sp at an enemy	451	/* Returns 1 is monster should cast spell sp at an enemy
714	* Returns 0 if the monster should not cast this spell.	452	* Returns 0 if the monster should not cast this spell.
715	*	453	*
…		…
723	*	461	*
724	* This could be a lot smarter - if there are few monsters around,	462	* This could be a lot smarter - if there are few monsters around,
725	* then disease might not be as bad. Likewise, if the monster is damaged,	463	* then disease might not be as bad. Likewise, if the monster is damaged,
726	* the right type of healing spell could be useful.	464	* the right type of healing spell could be useful.
727	*/	465	*/
728
729	static int	466	static int
730	monster_should_cast_spell (object *monster, object *spell_ob)	467	monster_should_cast_spell (object *monster, object *spell_ob)
731	{	468	{
732	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||	469	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||
733	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||	470	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||
…		…
736	spell_ob->subtype == SP_MAGIC_WALL || spell_ob->subtype == SP_SUMMON_MONSTER ||	473	spell_ob->subtype == SP_MAGIC_WALL || spell_ob->subtype == SP_SUMMON_MONSTER ||
737	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE)	474	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE)
738	return 1;	475	return 1;
739		476
740	return 0;	477	return 0;
		478	}
		479
		480	/* Checks if putting on 'item' will make 'who' do more
		481	* damage. This is a very simplistic check - also checking things
		482	* like speed and ac are also relevant.
		483	*
		484	* return true if item is a better object.
		485	*/
		486	static int
		487	check_good_weapon (object *who, object *item)
		488	{
		489	object *other_weap;
		490	int val = 0, i;
		491
		492	for (other_weap = who->inv; other_weap; other_weap = other_weap->below)
		493	if (other_weap->type == item->type && QUERY_FLAG (other_weap, FLAG_APPLIED))
		494	break;
		495
		496	if (!other_weap) /* No other weapons */
		497	return 1;
		498
		499	/* Rather than go through and apply the new one, and see if it is
		500	* better, just do some simple checks
		501	* Put some multipliers for things that hvae several effects,
		502	* eg, magic affects both damage and wc, so it has more weight
		503	*/
		504
		505	val = item->stats.dam - other_weap->stats.dam;
		506	val += (item->magic - other_weap->magic) * 3;
		507	/* Monsters don't really get benefits from things like regen rates
		508	* from items. But the bonus for their stats are very important.
		509	*/
		510	for (i = 0; i < NUM_STATS; i++)
		511	val += item->stats.stat (i) - other_weap->stats.stat (i) * 2;
		512
		513	if (val > 0)
		514	return 1;
		515	else
		516	return 0;
		517	}
		518
		519	static int
		520	check_good_armour (object *who, object *item)
		521	{
		522	object *other_armour;
		523	int val = 0, i;
		524
		525	for (other_armour = who->inv; other_armour; other_armour = other_armour->below)
		526	if (other_armour->type == item->type && QUERY_FLAG (other_armour, FLAG_APPLIED))
		527	break;
		528
		529	if (other_armour == NULL) /* No other armour, use the new */
		530	return 1;
		531
		532	/* Like above function , see which is better */
		533	val = item->stats.ac - other_armour->stats.ac;
		534	val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL]) / 5;
		535	val += (item->magic - other_armour->magic) * 3;
		536
		537	/* for the other protections, do weigh them very much in the equation -
		538	* it is the armor protection which is most important, because there is
		539	* no good way to know what the player may attack the monster with.
		540	* So if the new item has better protection than the old, give that higher
		541	* value. If the reverse, then decrease the value of this item some.
		542	*/
		543	for (i = 1; i < NROFATTACKS; i++)
		544	{
		545	if (item->resist[i] > other_armour->resist[i])
		546	val++;
		547	else if (item->resist[i] < other_armour->resist[i])
		548	val--;
		549	}
		550
		551	/* Very few armours have stats, so not much need to worry about those. */
		552
		553	if (val > 0)
		554	return 1;
		555	else
		556	return 0;
		557	}
		558
		559	/*
		560	* monster_check_apply() is meant to be called after an item is
		561	* inserted in a monster.
		562	* If an item becomes outdated (monster found a better item),
		563	* a pointer to that object is returned, so it can be dropped.
		564	* (so that other monsters can pick it up and use it)
		565	* Note that as things are now, monsters never drop something -
		566	* they can pick up all that they can use.
		567	*/
		568	/* Sept 96, fixed this so skills will be readied -b.t.*/
		569	void
		570	monster_check_apply (object *mon, object *item)
		571	{
		572	int flag = 0;
		573
		574	if (item->type == SPELLBOOK && mon->arch && (QUERY_FLAG (mon->arch, FLAG_CAST_SPELL)))
		575	{
		576	SET_FLAG (mon, FLAG_CAST_SPELL);
		577	return;
		578	}
		579
		580	/* If for some reason, this item is already applied, no more work to do */
		581	if (QUERY_FLAG (item, FLAG_APPLIED))
		582	return;
		583
		584	/* Might be better not to do this - if the monster can fire a bow,
		585	* it is possible in his wanderings, he will find one to use. In
		586	* which case, it would be nice to have ammo for it.
		587	*/
		588	if (QUERY_FLAG (mon, FLAG_USE_BOW) && item->type == ARROW)
		589	{
		590	/* Check for the right kind of bow */
		591	object *bow;
		592
		593	for (bow = mon->inv; bow; bow = bow->below)
		594	if (bow->type == BOW && bow->race == item->race)
		595	{
		596	SET_FLAG (mon, FLAG_READY_BOW);
		597	LOG (llevMonster, "Found correct bow for arrows.\n");
		598	return; /* nothing more to do for arrows */
		599	}
		600	}
		601
		602	if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE)
		603	flag = 1;
		604	/* Eating food gets hp back */
		605	else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD)
		606	flag = 1;
		607	else if (item->type == SCROLL && QUERY_FLAG (mon, FLAG_USE_SCROLL))
		608	{
		609	if (!item->inv)
		610	LOG (llevDebug, "Monster %d having scroll %d with empty inventory!", mon->count, item->count);
		611	else if (monster_should_cast_spell (mon, item->inv))
		612	SET_FLAG (mon, FLAG_READY_SCROLL);
		613	/* Don't use it right now */
		614	return;
		615	}
		616	else if (item->type == WEAPON)
		617	flag = check_good_weapon (mon, item);
		618	else if (item->is_armor ())
		619	flag = check_good_armour (mon, item);
		620	/* Should do something more, like make sure this is a better item */
		621	else if (item->type == RING)
		622	flag = 1;
		623	else if (item->type == WAND || item->type == ROD || item->type == HORN)
		624	{
		625	/* We never really 'ready' the wand/rod/horn, because that would mean the
		626	* weapon would get undone.
		627	*/
		628	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
		629	{
		630	SET_FLAG (mon, FLAG_READY_RANGE);
		631	SET_FLAG (item, FLAG_APPLIED);
		632	}
		633	return;
		634	}
		635	else if (item->type == BOW)
		636	{
		637	/* We never really 'ready' the bow, because that would mean the
		638	* weapon would get undone.
		639	*/
		640	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
		641	SET_FLAG (mon, FLAG_READY_BOW);
		642	return;
		643	}
		644	else if (item->type == SKILL)
		645	{
		646	/*
		647	* skills are specials: monsters must have the 'FLAG_READY_SKILL' flag set,
		648	* else they can't use the skill...
		649	* Skills also don't need to get applied, so return now.
		650	*/
		651	SET_FLAG (mon, FLAG_READY_SKILL);
		652	return;
		653	}
		654
		655	/* if we don't match one of the above types, return now.
		656	* can_apply_object will say that we can apply things like flesh,
		657	* bolts, and whatever else, because it only checks against the
		658	* body_info locations.
		659	*/
		660	if (!flag)
		661	return;
		662
		663	/* Check to see if the monster can use this item. If not, no need
		664	* to do further processing. Note that can_apply_object already checks
		665	* for the CAN_USE flags.
		666	*/
		667	if (can_apply_object (mon, item) & CAN_APPLY_NOT_MASK)
		668	return;
		669
		670	/* should only be applying this item, not unapplying it.
		671	* also, ignore status of curse so they can take off old armour.
		672	* monsters have some advantages after all.
		673	*/
		674	manual_apply (mon, item, AP_APPLY | AP_IGNORE_CURSE);
		675	}
		676
		677	static int
		678	can_hit (object *ob1, object *ob2, rv_vector * rv)
		679	{
		680	object *more;
		681	rv_vector rv1;
		682
		683	if (QUERY_FLAG (ob1, FLAG_CONFUSED) && !(rndm (3)))
		684	return 0;
		685
		686	if (abs (rv->distance_x) < 2 && abs (rv->distance_y) < 2)
		687	return 1;
		688
		689	/* check all the parts of ob2 - just because we can't get to
		690	* its head doesn't mean we don't want to pound its feet
		691	*/
		692	for (more = ob2->more; more; more = more->more)
		693	{
		694	get_rangevector (ob1, more, &rv1, 0);
		695	if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
		696	return 1;
		697	}
		698
		699	return 0;
		700	}
		701
		702	static int
		703	dist_att (int dir, object *ob, object *enemy, object *part, rv_vector *rv)
		704	{
		705	if (can_hit (part, enemy, rv))
		706	return dir;
		707
		708	if (rv->distance < 10)
		709	return absdir (dir + 4);
		710	else if (rv->distance > 18)
		711	return dir;
		712
		713	return 0;
		714	}
		715
		716	static int
		717	run_att (int dir, object *ob, object *enemy, object *part, rv_vector *rv)
		718	{
		719	if (can_hit (part, enemy, rv))
		720	return dir;
		721	else
		722	return absdir (dir + 4);
		723	}
		724
		725	static int
		726	hitrun_att (int dir, object *ob, object *enemy)
		727	{
		728	if (ob->move_status++ < 25)
		729	return dir;
		730	else if (ob->move_status < 50)
		731	return absdir (dir + 4);
		732	else
		733	ob->move_status = 0;
		734
		735	return absdir (dir + 4);
		736	}
		737
		738	static int
		739	wait_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		740	{
		741	int inrange = can_hit (part, enemy, rv);
		742
		743	if (ob->move_status || inrange)
		744	ob->move_status++;
		745
		746	if (ob->move_status == 0)
		747	return 0;
		748	else if (ob->move_status < 10)
		749	return dir;
		750	else if (ob->move_status < 15)
		751	return absdir (dir + 4);
		752
		753	ob->move_status = 0;
		754	return 0;
		755	}
		756
		757	static int
		758	disthit_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		759	{
		760	/* The logic below here looked plain wrong before. Basically, what should
		761	* happen is that if the creatures hp percentage falls below run_away,
		762	* the creature should run away (dir+4)
		763	* I think its wrong for a creature to have a zero maxhp value, but
		764	* at least one map has this set, and whatever the map contains, the
		765	* server should try to be resilant enough to avoid the problem
		766	*/
		767	if (ob->stats.hp * 100 < ob->stats.maxhp * ob->run_away)
		768	return absdir (dir + 4);
		769
		770	return dist_att (dir, ob, enemy, part, rv);
		771	}
		772
		773	static int
		774	wait_att2 (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		775	{
		776	if (rv->distance < 9)
		777	return absdir (dir + 4);
		778
		779	return 0;
		780	}
		781
		782	static void
		783	circ1_move (object *ob)
		784	{
		785	static int circle[12] = { 3, 3, 4, 5, 5, 6, 7, 7, 8, 1, 1, 2 };
		786
		787	if (++ob->move_status > 11)
		788	ob->move_status = 0;
		789
		790	if (!(move_object (ob, circle[ob->move_status])))
		791	move_object (ob, rndm (8) + 1);
		792	}
		793
		794	static void
		795	circ2_move (object *ob)
		796	{
		797	static int circle[20] = { 3, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 1, 1, 1, 2, 2 };
		798
		799	if (++ob->move_status > 19)
		800	ob->move_status = 0;
		801
		802	if (!(move_object (ob, circle[ob->move_status])))
		803	move_object (ob, rndm (8) + 1);
		804	}
		805
		806	static void
		807	pace_movev (object *ob)
		808	{
		809	if (ob->move_status++ > 6)
		810	ob->move_status = 0;
		811
		812	if (ob->move_status < 4)
		813	move_object (ob, 5);
		814	else
		815	move_object (ob, 1);
		816	}
		817
		818	static void
		819	pace_moveh (object *ob)
		820	{
		821	if (ob->move_status++ > 6)
		822	ob->move_status = 0;
		823
		824	if (ob->move_status < 4)
		825	move_object (ob, 3);
		826	else
		827	move_object (ob, 7);
		828	}
		829
		830	static void
		831	pace2_movev (object *ob)
		832	{
		833	if (ob->move_status++ > 16)
		834	ob->move_status = 0;
		835
		836	if (ob->move_status < 6)
		837	move_object (ob, 5);
		838	else if (ob->move_status < 8)
		839	return;
		840	else if (ob->move_status < 13)
		841	move_object (ob, 1);
		842	else
		843	return;
		844	}
		845
		846	static void
		847	pace2_moveh (object *ob)
		848	{
		849	if (ob->move_status++ > 16)
		850	ob->move_status = 0;
		851
		852	if (ob->move_status < 6)
		853	move_object (ob, 3);
		854	else if (ob->move_status < 8)
		855	return;
		856	else if (ob->move_status < 13)
		857	move_object (ob, 7);
		858	else
		859	return;
		860	}
		861
		862	static void
		863	rand_move (object *ob)
		864	{
		865	if (ob->move_status < 1 || ob->move_status > 8 || !(move_object (ob, ob->move_status || !(rndm (9)))))
		866	for (int i = 0; i < 5; i++)
		867	if (move_object (ob, ob->move_status = rndm (8) + 1))
		868	return;
741	}	869	}
742		870
743	#define MAX_KNOWN_SPELLS 20	871	#define MAX_KNOWN_SPELLS 20
744		872
745	/* Returns a randomly selected spell. This logic is still	873	/* Returns a randomly selected spell. This logic is still
…		…
1049	/* in server/player.c */	1177	/* in server/player.c */
1050	return fire_bow (head, part, NULL, dir, 0, part->x, part->y);	1178	return fire_bow (head, part, NULL, dir, 0, part->x, part->y);
1051		1179
1052	}	1180	}
1053		1181
1054	/* Checks if putting on 'item' will make 'who' do more
1055	* damage. This is a very simplistic check - also checking things
1056	* like speed and ac are also relevant.
1057	*
1058	* return true if item is a better object.
1059	*/
1060	int
1061	check_good_weapon (object *who, object *item)
1062	{
1063	object *other_weap;
1064	int val = 0, i;
1065
1066	for (other_weap = who->inv; other_weap; other_weap = other_weap->below)
1067	if (other_weap->type == item->type && QUERY_FLAG (other_weap, FLAG_APPLIED))
1068	break;
1069
1070	if (!other_weap) /* No other weapons */
1071	return 1;
1072
1073	/* Rather than go through and apply the new one, and see if it is
1074	* better, just do some simple checks
1075	* Put some multipliers for things that hvae several effects,
1076	* eg, magic affects both damage and wc, so it has more weight
1077	*/
1078
1079	val = item->stats.dam - other_weap->stats.dam;
1080	val += (item->magic - other_weap->magic) * 3;
1081	/* Monsters don't really get benefits from things like regen rates
1082	* from items. But the bonus for their stats are very important.
1083	*/
1084	for (i = 0; i < NUM_STATS; i++)
1085	val += item->stats.stat (i) - other_weap->stats.stat (i) * 2;
1086
1087	if (val > 0)
1088	return 1;
1089	else
1090	return 0;
1091	}
1092
1093	int
1094	check_good_armour (object *who, object *item)
1095	{
1096	object *other_armour;
1097	int val = 0, i;
1098
1099	for (other_armour = who->inv; other_armour; other_armour = other_armour->below)
1100	if (other_armour->type == item->type && QUERY_FLAG (other_armour, FLAG_APPLIED))
1101	break;
1102
1103	if (other_armour == NULL) /* No other armour, use the new */
1104	return 1;
1105
1106	/* Like above function , see which is better */
1107	val = item->stats.ac - other_armour->stats.ac;
1108	val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL]) / 5;
1109	val += (item->magic - other_armour->magic) * 3;
1110
1111	/* for the other protections, do weigh them very much in the equation -
1112	* it is the armor protection which is most important, because there is
1113	* no good way to know what the player may attack the monster with.
1114	* So if the new item has better protection than the old, give that higher
1115	* value. If the reverse, then decrease the value of this item some.
1116	*/
1117	for (i = 1; i < NROFATTACKS; i++)
1118	{
1119	if (item->resist[i] > other_armour->resist[i])
1120	val++;
1121	else if (item->resist[i] < other_armour->resist[i])
1122	val--;
1123	}
1124
1125	/* Very few armours have stats, so not much need to worry about those. */
1126
1127	if (val > 0)
1128	return 1;
1129	else
1130	return 0;
1131	}
1132
1133	/*
1134	* monster_check_pickup(): checks for items that monster can pick up.
1135	*
1136	* Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
1137	* Each time the blob passes over some treasure, it will
1138	* grab it a.s.a.p.
1139	*
1140	* Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
1141	* to handle this.
1142	*
1143	* This function was seen be continueing looping at one point (tmp->below
1144	* became a recursive loop. It may be better to call monster_check_apply
1145	* after we pick everything up, since that function may call others which
1146	* affect stacking on this space.
1147	*/
1148	void
1149	monster_check_pickup (object *monster)
1150	{
1151	object *tmp, *next;
1152
1153	for (tmp = monster->below; tmp != NULL; tmp = next)
1154	{
1155	next = tmp->below;
1156	if (monster_can_pick (monster, tmp))
1157	{
1158	tmp->remove ();
1159	tmp = insert_ob_in_ob (tmp, monster);
1160	(void) monster_check_apply (monster, tmp);
1161	}
1162	/* We could try to re-establish the cycling, of the space, but probably
1163	* not a big deal to just bail out.
1164	*/
1165	if (next && next->destroyed ())
1166	return;
1167	}
1168	}
1169
1170	/*
1171	* monster_can_pick(): If the monster is interested in picking up
1172	* the item, then return 0. Otherwise 0.
1173	* Instead of pick_up, flags for "greed", etc, should be used.
1174	* I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
1175	*/
1176	int
1177	monster_can_pick (object *monster, object *item)
1178	{
1179	int flag = 0;
1180	int i;
1181
1182	if (!can_pick (monster, item))
1183	return 0;
1184
1185	if (QUERY_FLAG (item, FLAG_UNPAID))
1186	return 0;
1187
1188	if (monster->pick_up & 64) /* All */
1189	flag = 1;
1190
1191	else
1192	switch (item->type)
1193	{
1194	case MONEY:
1195	case GEM:
1196	flag = monster->pick_up & 2;
1197	break;
1198
1199	case FOOD:
1200	flag = monster->pick_up & 4;
1201	break;
1202
1203	case WEAPON:
1204	flag = (monster->pick_up & 8) || QUERY_FLAG (monster, FLAG_USE_WEAPON);
1205	break;
1206
1207	case ARMOUR:
1208	case SHIELD:
1209	case HELMET:
1210	case BOOTS:
1211	case GLOVES:
1212	case GIRDLE:
1213	flag = (monster->pick_up & 16) || QUERY_FLAG (monster, FLAG_USE_ARMOUR);
1214	break;
1215
1216	case SKILL:
1217	flag = QUERY_FLAG (monster, FLAG_CAN_USE_SKILL);
1218	break;
1219
1220	case RING:
1221	flag = QUERY_FLAG (monster, FLAG_USE_RING);
1222	break;
1223
1224	case WAND:
1225	case HORN:
1226	case ROD:
1227	flag = QUERY_FLAG (monster, FLAG_USE_RANGE);
1228	break;
1229
1230	case SPELLBOOK:
1231	flag = monster->arch && QUERY_FLAG (monster->arch, FLAG_CAST_SPELL);
1232	break;
1233
1234	case SCROLL:
1235	flag = QUERY_FLAG (monster, FLAG_USE_SCROLL);
1236	break;
1237
1238	case BOW:
1239	case ARROW:
1240	flag = QUERY_FLAG (monster, FLAG_USE_BOW);
1241	break;
1242	}
1243
1244	/* Simplistic check - if the monster has a location to equip it, he will
1245	* pick it up. Note that this doesn't handle cases where an item may
1246	* use several locations.
1247	*/
1248	for (i = 0; i < NUM_BODY_LOCATIONS; i++)
1249	{
1250	if (monster->slot[i].info && item->slot[i].info)
1251	{
1252	flag = 1;
1253	break;
1254	}
1255	}
1256
1257	if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
1258	return 1;
1259
1260	return 0;
1261	}
1262
1263	/*
1264	* monster_apply_below():
1265	* Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
1266	* eager to apply things, encounters something apply-able,
1267	* then make him apply it
1268	*/
1269	void
1270	monster_apply_below (object *monster)
1271	{
1272	object *tmp, *next;
1273
1274	for (tmp = monster->below; tmp != NULL; tmp = next)
1275	{
1276	next = tmp->below;
1277	switch (tmp->type)
1278	{
1279	case CF_HANDLE:
1280	case TRIGGER:
1281	if (monster->will_apply & 1)
1282	manual_apply (monster, tmp, 0);
1283	break;
1284
1285	case TREASURE:
1286	if (monster->will_apply & 2)
1287	manual_apply (monster, tmp, 0);
1288	break;
1289
1290	}
1291	if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
1292	break;
1293	}
1294	}
1295
1296	/*
1297	* monster_check_apply() is meant to be called after an item is
1298	* inserted in a monster.
1299	* If an item becomes outdated (monster found a better item),
1300	* a pointer to that object is returned, so it can be dropped.
1301	* (so that other monsters can pick it up and use it)
1302	* Note that as things are now, monsters never drop something -
1303	* they can pick up all that they can use.
1304	*/
1305	/* Sept 96, fixed this so skills will be readied -b.t.*/
1306	void
1307	monster_check_apply (object *mon, object *item)
1308	{
1309	int flag = 0;
1310
1311	if (item->type == SPELLBOOK && mon->arch && (QUERY_FLAG (mon->arch, FLAG_CAST_SPELL)))
1312	{
1313	SET_FLAG (mon, FLAG_CAST_SPELL);
1314	return;
1315	}
1316
1317	/* If for some reason, this item is already applied, no more work to do */
1318	if (QUERY_FLAG (item, FLAG_APPLIED))
1319	return;
1320
1321	/* Might be better not to do this - if the monster can fire a bow,
1322	* it is possible in his wanderings, he will find one to use. In
1323	* which case, it would be nice to have ammo for it.
1324	*/
1325	if (QUERY_FLAG (mon, FLAG_USE_BOW) && item->type == ARROW)
1326	{
1327	/* Check for the right kind of bow */
1328	object *bow;
1329
1330	for (bow = mon->inv; bow; bow = bow->below)
1331	if (bow->type == BOW && bow->race == item->race)
1332	{
1333	SET_FLAG (mon, FLAG_READY_BOW);
1334	LOG (llevMonster, "Found correct bow for arrows.\n");
1335	return; /* nothing more to do for arrows */
1336	}
1337	}
1338
1339	if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE)
1340	flag = 1;
1341	/* Eating food gets hp back */
1342	else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD)
1343	flag = 1;
1344	else if (item->type == SCROLL && QUERY_FLAG (mon, FLAG_USE_SCROLL))
1345	{
1346	if (!item->inv)
1347	LOG (llevDebug, "Monster %d having scroll %d with empty inventory!", mon->count, item->count);
1348	else if (monster_should_cast_spell (mon, item->inv))
1349	SET_FLAG (mon, FLAG_READY_SCROLL);
1350	/* Don't use it right now */
1351	return;
1352	}
1353	else if (item->type == WEAPON)
1354	flag = check_good_weapon (mon, item);
1355	else if (item->is_armor ())
1356	flag = check_good_armour (mon, item);
1357	/* Should do something more, like make sure this is a better item */
1358	else if (item->type == RING)
1359	flag = 1;
1360	else if (item->type == WAND || item->type == ROD || item->type == HORN)
1361	{
1362	/* We never really 'ready' the wand/rod/horn, because that would mean the
1363	* weapon would get undone.
1364	*/
1365	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
1366	{
1367	SET_FLAG (mon, FLAG_READY_RANGE);
1368	SET_FLAG (item, FLAG_APPLIED);
1369	}
1370	return;
1371	}
1372	else if (item->type == BOW)
1373	{
1374	/* We never really 'ready' the bow, because that would mean the
1375	* weapon would get undone.
1376	*/
1377	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
1378	SET_FLAG (mon, FLAG_READY_BOW);
1379	return;
1380	}
1381	else if (item->type == SKILL)
1382	{
1383	/*
1384	* skills are specials: monsters must have the 'FLAG_READY_SKILL' flag set,
1385	* else they can't use the skill...
1386	* Skills also don't need to get applied, so return now.
1387	*/
1388	SET_FLAG (mon, FLAG_READY_SKILL);
1389	return;
1390	}
1391
1392	/* if we don't match one of the above types, return now.
1393	* can_apply_object will say that we can apply things like flesh,
1394	* bolts, and whatever else, because it only checks against the
1395	* body_info locations.
1396	*/
1397	if (!flag)
1398	return;
1399
1400	/* Check to see if the monster can use this item. If not, no need
1401	* to do further processing. Note that can_apply_object already checks
1402	* for the CAN_USE flags.
1403	*/
1404	if (can_apply_object (mon, item) & CAN_APPLY_NOT_MASK)
1405	return;
1406
1407	/* should only be applying this item, not unapplying it.
1408	* also, ignore status of curse so they can take off old armour.
1409	* monsters have some advantages after all.
1410	*/
1411	manual_apply (mon, item, AP_APPLY | AP_IGNORE_CURSE);
1412	}
1413
1414	void	1182	void
1415	npc_call_help (object *op)	1183	npc_call_help (object *op)
1416	{	1184	{
1417	int x, y, mflags;	1185	unordered_mapwalk (op, -7, -7, 7, 7)
1418	object *npc;
1419	sint16 sx, sy;
1420	maptile *m;
1421
1422	for (x = -3; x < 4; x++)
1423	for (y = -3; y < 4; y++)
1424	{	1186	{
1425	m = op->map;	1187	mapspace &ms = m->at (nx, ny);
1426	sx = op->x + x;	1188
1427	sy = op->y + y;
1428	mflags = get_map_flags (m, &m, sx, sy, &sx, &sy);
1429	/* If nothing alive on this space, no need to search the space. */	1189	/* If nothing alive on this space, no need to search the space. */
1430	if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))	1190	if (!(ms.flags () & P_IS_ALIVE))
1431	continue;	1191	continue;
1432		1192
1433	for (npc = GET_MAP_OB (m, sx, sy); npc != NULL; npc = npc->above)	1193	for (object *npc = ms.bot; npc; npc = npc->above)
1434	if (QUERY_FLAG (npc, FLAG_ALIVE) && QUERY_FLAG (npc, FLAG_UNAGGRESSIVE))	1194	if (QUERY_FLAG (npc, FLAG_ALIVE) && QUERY_FLAG (npc, FLAG_UNAGGRESSIVE))
1435	npc->enemy = op->enemy;	1195	npc->enemy = op->enemy;
1436	}	1196	}
1437	}
1438
1439	int
1440	dist_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1441	{
1442	if (can_hit (part, enemy, rv))
1443	return dir;
1444
1445	if (rv->distance < 10)
1446	return absdir (dir + 4);
1447	else if (rv->distance > 18)
1448	return dir;
1449
1450	return 0;
1451	}
1452
1453	int
1454	run_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1455	{
1456	if ((can_hit (part, enemy, rv) && ob->move_status < 20) || ob->move_status < 20)
1457	{
1458	ob->move_status++;
1459	return (dir);
1460	}
1461	else if (ob->move_status > 20)
1462	ob->move_status = 0;
1463
1464	return absdir (dir + 4);
1465	}
1466
1467	int
1468	hitrun_att (int dir, object *ob, object *enemy)
1469	{
1470	if (ob->move_status++ < 25)
1471	return dir;
1472	else if (ob->move_status < 50)
1473	return absdir (dir + 4);
1474	else
1475	ob->move_status = 0;
1476
1477	return absdir (dir + 4);
1478	}
1479
1480	int
1481	wait_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1482	{
1483
1484	int inrange = can_hit (part, enemy, rv);
1485
1486	if (ob->move_status || inrange)
1487	ob->move_status++;
1488
1489	if (ob->move_status == 0)
1490	return 0;
1491	else if (ob->move_status < 10)
1492	return dir;
1493	else if (ob->move_status < 15)
1494	return absdir (dir + 4);
1495
1496	ob->move_status = 0;
1497	return 0;
1498	}
1499
1500	int
1501	disthit_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1502	{
1503
1504	/* The logic below here looked plain wrong before. Basically, what should
1505	* happen is that if the creatures hp percentage falls below run_away,
1506	* the creature should run away (dir+4)
1507	* I think its wrong for a creature to have a zero maxhp value, but
1508	* at least one map has this set, and whatever the map contains, the
1509	* server should try to be resilant enough to avoid the problem
1510	*/
1511	if (ob->stats.maxhp && (ob->stats.hp * 100) / ob->stats.maxhp < ob->run_away)
1512	return absdir (dir + 4);
1513
1514	return dist_att (dir, ob, enemy, part, rv);
1515	}
1516
1517	int
1518	wait_att2 (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1519	{
1520	if (rv->distance < 9)
1521	return absdir (dir + 4);
1522
1523	return 0;
1524	}
1525
1526	void
1527	circ1_move (object *ob)
1528	{
1529	static int circle[12] = { 3, 3, 4, 5, 5, 6, 7, 7, 8, 1, 1, 2 };
1530
1531	if (++ob->move_status > 11)
1532	ob->move_status = 0;
1533
1534	if (!(move_object (ob, circle[ob->move_status])))
1535	move_object (ob, rndm (8) + 1);
1536	}
1537
1538	void
1539	circ2_move (object *ob)
1540	{
1541	static int circle[20] = { 3, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 1, 1, 1, 2, 2 };
1542
1543	if (++ob->move_status > 19)
1544	ob->move_status = 0;
1545
1546	if (!(move_object (ob, circle[ob->move_status])))
1547	move_object (ob, rndm (8) + 1);
1548	}
1549
1550	void
1551	pace_movev (object *ob)
1552	{
1553	if (ob->move_status++ > 6)
1554	ob->move_status = 0;
1555
1556	if (ob->move_status < 4)
1557	move_object (ob, 5);
1558	else
1559	move_object (ob, 1);
1560	}
1561
1562	void
1563	pace_moveh (object *ob)
1564	{
1565	if (ob->move_status++ > 6)
1566	ob->move_status = 0;
1567
1568	if (ob->move_status < 4)
1569	move_object (ob, 3);
1570	else
1571	move_object (ob, 7);
1572	}
1573
1574	void
1575	pace2_movev (object *ob)
1576	{
1577	if (ob->move_status++ > 16)
1578	ob->move_status = 0;
1579
1580	if (ob->move_status < 6)
1581	move_object (ob, 5);
1582	else if (ob->move_status < 8)
1583	return;
1584	else if (ob->move_status < 13)
1585	move_object (ob, 1);
1586	else
1587	return;
1588	}
1589
1590	void
1591	pace2_moveh (object *ob)
1592	{
1593	if (ob->move_status++ > 16)
1594	ob->move_status = 0;
1595
1596	if (ob->move_status < 6)
1597	move_object (ob, 3);
1598	else if (ob->move_status < 8)
1599	return;
1600	else if (ob->move_status < 13)
1601	move_object (ob, 7);
1602	else
1603	return;
1604	}
1605
1606	void
1607	rand_move (object *ob)
1608	{
1609	if (ob->move_status < 1 || ob->move_status > 8 || !(move_object (ob, ob->move_status || !(rndm (9)))))
1610	for (int i = 0; i < 5; i++)
1611	if (move_object (ob, ob->move_status = rndm (8) + 1))
1612	return;
1613	}	1197	}
1614		1198
1615	void	1199	void
1616	check_earthwalls (object *op, maptile *m, int x, int y)	1200	check_earthwalls (object *op, maptile *m, int x, int y)
1617	{	1201	{
…		…
1668	#ifdef DEBUG_THROW	1252	#ifdef DEBUG_THROW
1669	LOG (llevDebug, "%s chooses to throw: %s (%d)\n", op->name, !(tmp) ? "(nothing)" : query_name (tmp), tmp ? tmp->count : -1);	1253	LOG (llevDebug, "%s chooses to throw: %s (%d)\n", op->name, !(tmp) ? "(nothing)" : query_name (tmp), tmp ? tmp->count : -1);
1670	#endif	1254	#endif
1671		1255
1672	return tmp;	1256	return tmp;
		1257	}
		1258
		1259	/*
		1260	* Move-monster returns 1 if the object has been freed, otherwise 0.
		1261	*/
		1262	int
		1263	move_monster (object *op)
		1264	{
		1265	int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */
		1266	object *owner, *enemy, *part, *oph = op;
		1267	rv_vector rv;
		1268
		1269	/* Monsters not on maps don't do anything. These monsters are things
		1270	* Like royal guards in city dwellers inventories.
		1271	*/
		1272	if (!op->map)
		1273	return 0;
		1274
		1275	/* for target facing, we copy this value here for fast access */
		1276	if (oph->head) /* force update the head - one arch one pic */
		1277	oph = oph->head;
		1278
		1279	if (QUERY_FLAG (op, FLAG_NO_ATTACK)) /* we never ever attack */
		1280	enemy = op->enemy = NULL;
		1281	else if ((enemy = find_enemy (op, &rv)))
		1282	/* we have an enemy, just tell him we want him dead */
		1283	enemy->attacked_by = op; /* our ptr */
		1284
		1285	/* generate hp, if applicable */
		1286	if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
		1287	{
		1288	/* last heal is in funny units. Dividing by speed puts
		1289	* the regeneration rate on a basis of time instead of
		1290	* #moves the monster makes. The scaling by 8 is
		1291	* to capture 8th's of a hp fraction regens
		1292	*
		1293	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
		1294	* overflow might produce monsters with negative hp.
		1295	*/
		1296
		1297	op->last_heal += (int) ((float) (8 * op->stats.Con) / FABS (op->speed));
		1298	op->stats.hp = MIN ((sint32) op->stats.hp + op->last_heal / 32, op->stats.maxhp); /* causes Con/4 hp/tick */
		1299	op->last_heal %= 32;
		1300
		1301	/* So if the monster has gained enough HP that they are no longer afraid */
		1302	if (QUERY_FLAG (op, FLAG_RUN_AWAY) && op->stats.hp >= (signed short)(((float)op->run_away / 100.f) * (float)op->stats.maxhp))
		1303	CLEAR_FLAG (op, FLAG_RUN_AWAY);
		1304
		1305	if (op->stats.hp > op->stats.maxhp)
		1306	op->stats.hp = op->stats.maxhp;
		1307	}
		1308
		1309	/* generate sp, if applicable */
		1310	if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
		1311	{
		1312	/* last_sp is in funny units. Dividing by speed puts
		1313	* the regeneration rate on a basis of time instead of
		1314	* #moves the monster makes. The scaling by 8 is
		1315	* to capture 8th's of a sp fraction regens
		1316	*
		1317	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
		1318	* overflow might produce monsters with negative sp.
		1319	*/
		1320
		1321	op->last_sp += (int) ((float) (8 * op->stats.Pow) / fabsf (op->speed));
		1322	op->stats.sp = min (op->stats.sp + op->last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
		1323	op->last_sp %= 128;
		1324	}
		1325
		1326	/* this should probably get modified by many more values.
		1327	* (eg, creatures resistance to fear, level, etc. )
		1328	*/
		1329	if (QUERY_FLAG (op, FLAG_SCARED) && !(rndm (20)))
		1330	CLEAR_FLAG (op, FLAG_SCARED); /* Time to regain some "guts"... */
		1331
		1332	if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
		1333	return QUERY_FLAG (op, FLAG_FREED);
		1334
		1335	if (QUERY_FLAG (op, FLAG_SLEEP) || QUERY_FLAG (op, FLAG_BLIND) ||
		1336	((op->map->darklevel () > 0) && !QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
		1337	if (!check_wakeup (op, enemy, &rv))
		1338	return 0;
		1339
		1340	/* check if monster pops out of hidden spot */
		1341	if (op->flag [FLAG_HIDDEN])
		1342	do_hidden_move (op);
		1343
		1344	if (op->pick_up)
		1345	monster_check_pickup (op);
		1346
		1347	if (op->will_apply)
		1348	monster_apply_below (op); /* Check for items to apply below */
		1349
		1350	/* If we don't have an enemy, do special movement or the like */
		1351	if (!enemy)
		1352	{
		1353	if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
		1354	{
		1355	op->drop_and_destroy ();
		1356	return 1;
		1357	}
		1358
		1359	/* Probably really a bug for a creature to have both
		1360	* stand still and a movement type set.
		1361	*/
		1362	if (!QUERY_FLAG (op, FLAG_STAND_STILL))
		1363	{
		1364	if (op->attack_movement & HI4)
		1365	{
		1366	switch (op->attack_movement & HI4)
		1367	{
		1368	case PETMOVE:
		1369	pet_move (op);
		1370	break;
		1371
		1372	case CIRCLE1:
		1373	circ1_move (op);
		1374	break;
		1375
		1376	case CIRCLE2:
		1377	circ2_move (op);
		1378	break;
		1379
		1380	case PACEV:
		1381	pace_movev (op);
		1382	break;
		1383
		1384	case PACEH:
		1385	pace_moveh (op);
		1386	break;
		1387
		1388	case PACEV2:
		1389	pace2_movev (op);
		1390	break;
		1391
		1392	case PACEH2:
		1393	pace2_moveh (op);
		1394	break;
		1395
		1396	case RANDO:
		1397	rand_move (op);
		1398	break;
		1399
		1400	case RANDO2:
		1401	move_randomly (op);
		1402	break;
		1403	}
		1404
		1405	return 0;
		1406	}
		1407	else if (QUERY_FLAG (op, FLAG_RANDOM_MOVE))
		1408	move_randomly (op);
		1409	} /* stand still */
		1410
		1411	return 0;
		1412	} /* no enemy */
		1413
		1414	/* We have an enemy. Block immediately below is for pets */
		1415	if ((op->attack_movement & HI4) == PETMOVE
		1416	&& (owner = op->owner) != NULL
		1417	&& !on_same_map (op, owner)
		1418	&& !owner->flag [FLAG_REMOVED])
		1419	return follow_owner (op, owner);
		1420
		1421	/* doppleganger code to change monster facing to that of the nearest
		1422	* player. Hmm. The code is here, but no monster in the current
		1423	* arch set uses it.
		1424	*/
		1425	if (op->race == shstr_doppleganger)
		1426	{
		1427	op->face = enemy->face;
		1428	op->name = enemy->name;
		1429	}
		1430
		1431	/* Calculate range information for closest body part - this
		1432	* is used for the 'skill' code, which isn't that smart when
		1433	* it comes to figuring it out - otherwise, giants throw boulders
		1434	* into themselves.
		1435	*/
		1436	get_rangevector (op, enemy, &rv, 0);
		1437
		1438	/* Move the check for scared up here - if the monster was scared,
		1439	* we were not doing any of the logic below, so might as well save
		1440	* a few cpu cycles.
		1441	*/
		1442	if (!QUERY_FLAG (op, FLAG_SCARED))
		1443	{
		1444	rv_vector rv1;
		1445
		1446	/* now we test every part of an object .... this is a real ugly piece of code */
		1447	for (part = op; part; part = part->more)
		1448	{
		1449	get_rangevector (part, enemy, &rv1, 0x1);
		1450	dir = rv1.direction;
		1451
		1452	/* hm, not sure about this part - in original was a scared flag here too
		1453	* but that we test above... so can be old code here
		1454	*/
		1455	if (QUERY_FLAG (op, FLAG_RUN_AWAY))
		1456	dir = absdir (dir + 4);
		1457
		1458	if (QUERY_FLAG (op, FLAG_CONFUSED))
		1459	dir = absdir (dir + rndm (3) + rndm (3) - 2);
		1460
		1461	if (QUERY_FLAG (op, FLAG_CAST_SPELL) && !(rndm (3)))
		1462	if (monster_cast_spell (op, part, enemy, dir, &rv1))
		1463	return 0;
		1464
		1465	if (QUERY_FLAG (op, FLAG_READY_SCROLL) && !(rndm (3)))
		1466	if (monster_use_scroll (op, part, enemy, dir, &rv1))
		1467	return 0;
		1468
		1469	if (QUERY_FLAG (op, FLAG_READY_RANGE) && !(rndm (3)))
		1470	if (monster_use_range (op, part, enemy, dir))
		1471	return 0;
		1472
		1473	if (QUERY_FLAG (op, FLAG_READY_SKILL) && !(rndm (3)))
		1474	if (monster_use_skill (op, rv.part, enemy, rv.direction))
		1475	return 0;
		1476
		1477	if (QUERY_FLAG (op, FLAG_READY_BOW) && !(rndm (2)))
		1478	if (monster_use_bow (op, part, enemy, dir))
		1479	return 0;
		1480	} /* for processing of all parts */
		1481	} /* If not scared */
		1482
		1483	part = rv.part;
		1484	dir = rv.direction;
		1485
		1486	//-GPL
		1487
		1488	// if the enemy is a player, we have los. if los says we
		1489	// can directly reach the player, we do not deviate.
		1490	// for non-players, we never deviate
		1491	if (op->stats.Wis >= 8
		1492	&& enemy->contr && enemy->contr->darkness_at (op->map, op->x, op->y) == LOS_BLOCKED)
		1493	{
		1494	int sdir = 0;
		1495	uint32_t &smell = op->ms ().smell;
		1496
		1497	for (int ndir = 1; ndir <= 8; ++ndir)
		1498	{
		1499	mapxy pos (op); pos.move (ndir);
		1500
		1501	if (pos.normalise ())
		1502	{
		1503	mapspace &ms = pos.ms ();
		1504
		1505	if (ms.smell > smell)
		1506	{
		1507	//printf ("%s: found smell, following it, apparently (%d, %d)\n",& op->name,op->ms().smell,ms.smell);//D
		1508	if (op->stats.Wis >= 10)
		1509	smell = ms.smell - 1; // smarter: tell others
		1510
		1511	sdir = ndir;
		1512
		1513	// perturbing the path might let the monster lose track,
		1514	// but it will also widen the actual path, spreading information
		1515	if (op->stats.Wis >= 15 && !rndm (20)) // even smarter, deviate and spread?
		1516	sdir = absdir (sdir + 1 - rndm (2) * 2);
		1517	}
		1518	}
		1519	}
		1520
		1521	if (sdir)
		1522	dir = sdir;
		1523	else if (smell)
		1524	{
		1525	// no better smell found, so assume the player jumped, and erase this smell
		1526	//printf ("erasing smell %d\n", op->ms ().smell);//D
		1527	unordered_mapwalk (op, -1, -1, 1, 1)
		1528	m->at (nx, ny).smell = 0;
		1529	}
		1530	}
		1531
		1532	//+GPL
		1533
		1534	if (QUERY_FLAG (op, FLAG_SCARED) || QUERY_FLAG (op, FLAG_RUN_AWAY))
		1535	dir = absdir (dir + 4);
		1536
		1537	if (QUERY_FLAG (op, FLAG_CONFUSED))
		1538	dir = absdir (dir + rndm (3) + rndm (3) - 2);
		1539
		1540	pre_att_dir = dir; /* remember the original direction */
		1541
		1542	if ((op->attack_movement & LO4) && !QUERY_FLAG (op, FLAG_SCARED))
		1543	{
		1544	switch (op->attack_movement & LO4)
		1545	{
		1546	case DISTATT:
		1547	dir = dist_att (dir, op, enemy, part, &rv);
		1548	break;
		1549
		1550	case RUNATT:
		1551	dir = run_att (dir, op, enemy, part, &rv);
		1552	break;
		1553
		1554	case HITRUN:
		1555	dir = hitrun_att (dir, op, enemy);
		1556	break;
		1557
		1558	case WAITATT:
		1559	dir = wait_att (dir, op, enemy, part, &rv);
		1560	break;
		1561
		1562	case RUSH: /* default - monster normally moves towards player */
		1563	case ALLRUN:
		1564	break;
		1565
		1566	case DISTHIT:
		1567	dir = disthit_att (dir, op, enemy, part, &rv);
		1568	break;
		1569
		1570	case WAIT2:
		1571	dir = wait_att2 (dir, op, enemy, part, &rv);
		1572	break;
		1573
		1574	default:
		1575	LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
		1576	}
		1577	}
		1578
		1579	if (!dir)
		1580	return 0;
		1581
		1582	if (!QUERY_FLAG (op, FLAG_STAND_STILL))
		1583	{
		1584	if (move_object (op, dir)) /* Can the monster move directly toward player? */
		1585	{
		1586	/* elmex: Turn our monster after it moved if it has DISTATT attack */
		1587	if ((op->attack_movement & LO4) == DISTATT)
		1588	op->direction = pre_att_dir;
		1589
		1590	return 0;
		1591	}
		1592
		1593	if (QUERY_FLAG (op, FLAG_SCARED) || !can_hit (part, enemy, &rv) || QUERY_FLAG (op, FLAG_RUN_AWAY))
		1594	{
		1595	/* Try move around corners if !close */
		1596	int maxdiff = (QUERY_FLAG (op, FLAG_ONLY_ATTACK) || rndm (2)) ? 1 : 2;
		1597
		1598	for (diff = 1; diff <= maxdiff; diff++)
		1599	{
		1600	/* try different detours */
		1601	int m = 1 - rndm (2) * 2; /* Try left or right first? */
		1602
		1603	if (move_object (op, absdir (dir + diff * m)) || move_object (op, absdir (dir - diff * m)))
		1604	return 0;
		1605	}
		1606	}
		1607	} /* if monster is not standing still */
		1608
		1609	/* elmex: Turn our monster after it moved if it has DISTATT attack */
		1610	if ((op->attack_movement & LO4) == DISTATT)
		1611	op->direction = pre_att_dir;
		1612
		1613	/*
		1614	* Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
		1615	* direction if they can't move away.
		1616	*/
		1617	if (!QUERY_FLAG (op, FLAG_ONLY_ATTACK) && (QUERY_FLAG (op, FLAG_RUN_AWAY) || QUERY_FLAG (op, FLAG_SCARED)))
		1618	if (move_randomly (op))
		1619	return 0;
		1620
		1621	/*
		1622	* Try giving the monster a new enemy - the player that is closest
		1623	* to it. In this way, it won't just keep trying to get to a target
		1624	* that is inaccessible.
		1625	* This could be more clever - it should go through a list of several
		1626	* enemies, as it is now, you could perhaps get situations where there
		1627	* are two players flanking the monster at close distance, but which
		1628	* the monster can't get to, and a third one at a far distance that
		1629	* the monster could get to - as it is, the monster won't look at that
		1630	* third one.
		1631	*/
		1632	if (!QUERY_FLAG (op, FLAG_FRIENDLY) && enemy == op->enemy)
		1633	{
		1634	object *nearest_player = get_nearest_player (op);
		1635
		1636	if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
		1637	{
		1638	op->enemy = 0;
		1639	enemy = nearest_player;
		1640	}
		1641	}
		1642
		1643	if (!QUERY_FLAG (op, FLAG_SCARED) && can_hit (part, enemy, &rv))
		1644	{
		1645	/* The adjustement to wc that was here before looked totally bogus -
		1646	* since wc can in fact get negative, that would mean by adding
		1647	* the current wc, the creature gets better? Instead, just
		1648	* add a fixed amount - nasty creatures that are runny away should
		1649	* still be pretty nasty.
		1650	*/
		1651	if (QUERY_FLAG (op, FLAG_RUN_AWAY))
		1652	{
		1653	part->stats.wc += 10;
		1654	skill_attack (enemy, part, 0, NULL, NULL);
		1655	part->stats.wc -= 10;
		1656	}
		1657	else
		1658	skill_attack (enemy, part, 0, NULL, NULL);
		1659	} /* if monster is in attack range */
		1660
		1661	if (QUERY_FLAG (part, FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
		1662	return 1;
		1663
		1664	if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
		1665	{
		1666	op->drop_and_destroy ();
		1667	return 1;
		1668	}
		1669
		1670	return 0;
1673	}	1671	}
1674		1672
1675	/* determine if we can 'detect' the enemy. Check for walls blocking the	1673	/* determine if we can 'detect' the enemy. Check for walls blocking the
1676	* los. Also, just because its hidden/invisible, we may be sensitive/smart	1674	* los. Also, just because its hidden/invisible, we may be sensitive/smart
1677	* enough (based on Wis & Int) to figure out where the enemy is. -b.t.	1675	* enough (based on Wis & Int) to figure out where the enemy is. -b.t.
…		…
1682	* Returns 0 if enemy can not be detected, 1 if it is detected	1680	* Returns 0 if enemy can not be detected, 1 if it is detected
1683	*/	1681	*/
1684	int	1682	int
1685	can_detect_enemy (object *op, object *enemy, rv_vector * rv)	1683	can_detect_enemy (object *op, object *enemy, rv_vector * rv)
1686	{	1684	{
1687	int radius = MIN_MON_RADIUS, hide_discovery;
1688
1689	/* null detection for any of these condtions always */	1685	/* null detection for any of these condtions always */
1690	if (!op || !enemy || !op->map || !enemy->map)	1686	if (!op || !enemy || !op->map || !enemy->map)
1691	return 0;	1687	return 0;
1692		1688
1693	/* If the monster (op) has no way to get to the enemy, do nothing */	1689	/* If the monster (op) has no way to get to the enemy, do nothing */
…		…
1695	return 0;	1691	return 0;
1696		1692
1697	get_rangevector (op, enemy, rv, 0);	1693	get_rangevector (op, enemy, rv, 0);
1698		1694
1699	/* Monsters always ignore the DM */	1695	/* Monsters always ignore the DM */
1700	if (op->type != PLAYER && QUERY_FLAG (enemy, FLAG_WIZ))	1696	if (!op->is_player () && QUERY_FLAG (enemy, FLAG_WIZ))
1701	return 0;	1697	return 0;
1702		1698
1703	/* simple check. Should probably put some range checks in here. */	1699	/* simple check. Should probably put some range checks in here. */
1704	if (can_see_enemy (op, enemy))	1700	if (can_see_enemy (op, enemy))
1705	return 1;	1701	return 1;
1706		1702
1707	/* The rest of this is for monsters. Players are on their own for	1703	/* The rest of this is for monsters. Players are on their own for
1708	* finding enemies!	1704	* finding enemies!
1709	*/	1705	*/
1710	if (op->type == PLAYER)	1706	if (op->is_player ())
1711	return 0;	1707	return 0;
1712		1708
1713	/* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE	1709	/* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE
1714	* flag (which was already checked) in can_see_enmy (). Lets get out of here	1710	* flag (which was already checked) in can_see_enemy (). Lets get out of here
1715	*/	1711	*/
1716	if (enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden)))	1712	if (enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden)))
1717	return 0;	1713	return 0;
1718		1714
		1715	int radius = MIN_MON_RADIUS;
		1716
1719	/* use this for invis also */	1717	/* use this for invis also */
1720	hide_discovery = op->stats.Int / 5;	1718	int hide_discovery = op->stats.Int / 5;
1721		1719
1722	/* Determine Detection radii */	1720	/* Determine Detection radii */
1723	if (!enemy->flag [FLAG_HIDDEN]) /* to detect non-hidden (eg dark/invis enemy) */	1721	if (!enemy->flag [FLAG_HIDDEN]) /* to detect non-hidden (eg dark/invis enemy) */
1724	radius = max (MIN_MON_RADIUS, op->stats.Wis / 5 + 1);	1722	radius = max (MIN_MON_RADIUS, op->stats.Wis / 3 + 1);
1725	else	1723	else
1726	{ /* a level/INT/Dex adjustment for hiding */	1724	{ /* a level/INT/Dex adjustment for hiding */
1727	int bonus = op->level / 2 + op->stats.Int / 5;	1725	int bonus = op->level / 2 + op->stats.Int / 5;
1728		1726
1729	if (enemy->is_player ())	1727	if (enemy->is_player ())
…		…
1751	radius /= 2;	1749	radius /= 2;
1752	hide_discovery /= 3;	1750	hide_discovery /= 3;
1753	}	1751	}
1754		1752
1755	/* Radii adjustment for enemy standing in the dark */	1753	/* Radii adjustment for enemy standing in the dark */
1756	if (op->map->darklevel () > 0 && !stand_in_light (enemy))	1754	if (!stand_in_light (enemy))
1757	{	1755	{
1758	/* on dark maps body heat can help indicate location with infravision	1756	/* on dark maps body heat can help indicate location with infravision
1759	* undead don't have body heat, so no benefit detecting them.	1757	* undead don't have body heat, so no benefit detecting them.
1760	*/	1758	*/
1761	if (QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !is_true_undead (enemy))	1759	if (QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !is_true_undead (enemy))
…		…
1764	radius -= op->map->darklevel () / 2;	1762	radius -= op->map->darklevel () / 2;
1765		1763
1766	/* op next to a monster (and not in complete darkness)	1764	/* op next to a monster (and not in complete darkness)
1767	* the monster should have a chance to see you.	1765	* the monster should have a chance to see you.
1768	*/	1766	*/
1769	if (radius < MIN_MON_RADIUS && op->map->darklevel () < 5 && rv->distance <= 1)	1767	if (radius < MIN_MON_RADIUS && op->map->darklevel () < MAX_DARKNESS && rv->distance <= 1)
1770	radius = MIN_MON_RADIUS;	1768	radius = MIN_MON_RADIUS;
1771	} /* if on dark map */	1769	} /* if on dark map */
1772		1770
1773	/* Lets not worry about monsters that have incredible detection	1771	/* Lets not worry about monsters that have incredible detection
1774	* radii, we only need to worry here about things the player can	1772	* radii, we only need to worry here about things the player can
…		…
1822	/* Wasn't detected above, so still hidden */	1820	/* Wasn't detected above, so still hidden */
1823	return 0;	1821	return 0;
1824	}	1822	}
1825		1823
1826	/* determine if op stands in a lighted square. This is not a very	1824	/* determine if op stands in a lighted square. This is not a very
1827	* intellegent algorithm. For one thing, we ignore los here, SO it	1825	* intelligent algorithm. For one thing, we ignore los here, SO it
1828	* is possible for a bright light to illuminate a player on the	1826	* is possible for a bright light to illuminate a player on the
1829	* other side of a wall (!).	1827	* other side of a wall (!).
1830	*/	1828	*/
1831	int	1829	int
1832	stand_in_light (object *op)	1830	stand_in_light (object *op)
1833	{	1831	{
1834	if (op)	1832	if (op)
1835	{	1833	{
		1834	if (!op->is_on_map ())
		1835	return 0;
		1836
		1837	if (op->map->darklevel () <= 0)
		1838	return 1;
		1839
1836	if (op->glow_radius > 0)	1840	if (op->glow_radius > 0)
1837	return 1;	1841	return 1;
1838		1842
1839	if (op->map)	1843	if (op->map)
1840	unordered_mapwalk (op, -MAX_LIGHT_RADIUS, -MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS)	1844	unordered_mapwalk (op, -MAX_LIGHT_RADIUS, -MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS)
…		…
1878	{	1882	{
1879	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!	1883	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!
1880	* However,if you carry any source of light, then the hidden	1884	* However,if you carry any source of light, then the hidden
1881	* creature is seeable (and stupid) */	1885	* creature is seeable (and stupid) */
1882		1886
1883	if (has_carried_lights (enemy))	1887	if (enemy->has_carried_lights ())
1884	{	1888	{
1885	if (enemy->flag [FLAG_HIDDEN])	1889	if (enemy->flag [FLAG_HIDDEN])
1886	{	1890	{
1887	make_visible (enemy);	1891	make_visible (enemy);
1888	new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!");	1892	new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!");
…		…
1912	* we care about the enemy maps status, not the looker.	1916	* we care about the enemy maps status, not the looker.
1913	* only relevant for tiled maps, but it is possible that the	1917	* only relevant for tiled maps, but it is possible that the
1914	* enemy is on a bright map and the looker on a dark - in that	1918	* enemy is on a bright map and the looker on a dark - in that
1915	* case, the looker can still see the enemy	1919	* case, the looker can still see the enemy
1916	*/	1920	*/
1917	if (enemy->map->darklevel () > 0
1918	&& !stand_in_light (enemy)	1921	if (!stand_in_light (enemy)
1919	&& (!QUERY_FLAG (looker, FLAG_SEE_IN_DARK) || !is_true_undead (looker) || !QUERY_FLAG (looker, FLAG_XRAYS)))	1922	&& (!QUERY_FLAG (looker, FLAG_SEE_IN_DARK) || !is_true_undead (looker) || !QUERY_FLAG (looker, FLAG_XRAYS)))
1920	return 0;	1923	return 0;
1921		1924
1922	return 1;	1925	return 1;
1923	}	1926	}
1924		1927
		1928	//-GPL

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