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Comparing deliantra/server/server/monster.C (file contents):
Revision 1.7 by pippijn, Thu Sep 7 10:01:58 2006 UTC vs.
Revision 1.73 by root, Fri Nov 6 12:49:19 2009 UTC

1	/*	1	/*
2	* static char *rcsid_monster_c =	2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	* "$Id: monster.C,v 1.7 2006/09/07 10:01:58 pippijn Exp $";	3	*
		4	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
		5	* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
		6	* Copyright (©) 1992,2007 Frank Tore Johansen
		7	*
		8	* Deliantra is free software: you can redistribute it and/or modify it under
		9	* the terms of the Affero GNU General Public License as published by the
		10	* Free Software Foundation, either version 3 of the License, or (at your
		11	* option) any later version.
		12	*
		13	* This program is distributed in the hope that it will be useful,
		14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		16	* GNU General Public License for more details.
		17	*
		18	* You should have received a copy of the Affero GNU General Public License
		19	* and the GNU General Public License along with this program. If not, see
		20	* <http://www.gnu.org/licenses/>.
		21	*
		22	* The authors can be reached via e-mail to <support@deliantra.net>
4	*/	23	*/
5		24
6	/*	25	//+GPL
7	CrossFire, A Multiplayer game for X-windows
8
9	Copyright (C) 2002 Mark Wedel & Crossfire Development Team
10	Copyright (C) 1992 Frank Tore Johansen
11
12	This program is free software; you can redistribute it and/or modify
13	it under the terms of the GNU General Public License as published by
14	the Free Software Foundation; either version 2 of the License, or
15	(at your option) any later version.
16
17	This program is distributed in the hope that it will be useful,
18	but WITHOUT ANY WARRANTY; without even the implied warranty of
19	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20	GNU General Public License for more details.
21
22	You should have received a copy of the GNU General Public License
23	along with this program; if not, write to the Free Software
24	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25
26	The authors can be reached via e-mail at crossfire-devel@real-time.com
27	*/
28		26
29	#include <global.h>	27	#include <global.h>
30	#ifndef __CEXTRACT__
31	#include <sproto.h>	28	#include <sproto.h>
32	#include <spells.h>	29	#include <spells.h>
33	#include <skills.h>	30	#include <skills.h>
34	#endif
35		31
36
37	#define MIN_MON_RADIUS 3 /* minimum monster detection radius */	32	#define MIN_MON_RADIUS 3 /* minimum monster detection radius */
38
39		33
40	/* checks npc->enemy and returns that enemy if still valid,	34	/* checks npc->enemy and returns that enemy if still valid,
41	* NULL otherwise.	35	* NULL otherwise.
42	* this is map tile aware.	36	* this is map tile aware.
43	* If this returns an enemy, the range vector rv should also be	37	* If this returns an enemy, the range vector rv should also be
44	* set to sane values.	38	* set to sane values.
45	*/	39	*/
		40	object *
46	object *check_enemy(object *npc, rv_vector *rv) {	41	check_enemy (object *npc, rv_vector * rv)
47		42	{
48	/* if this is pet, let him attack the same enemy as his owner	43	/* if this is pet, let him attack the same enemy as his owner
49	* TODO: when there is no ower enemy, try to find a target,	44	* TODO: when there is no ower enemy, try to find a target,
50	* which CAN attack the owner. */	45	* which CAN attack the owner. */
51	if ((npc->attack_movement & HI4) == PETMOVE)	46	if ((npc->attack_movement & HI4) == PETMOVE)
52	{	47	{
53	if (npc->owner == NULL)	48	if (npc->owner == NULL)
54	npc->enemy = NULL;	49	npc->enemy = NULL;
55	else if (npc->enemy == NULL)	50	else if (npc->enemy == NULL)
56	npc->enemy = npc->owner->enemy;	51	npc->enemy = npc->owner->enemy;
57	}	52	}
58		53
59	/* periodically, a monster mayu change its target. Also, if the object	54	/* periodically, a monster may change its target. Also, if the object
60	* has been destroyed, etc, clear the enemy.	55	* has been destroyed, etc, clear the enemy.
61	* 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
62	* attacked monsters to leave the attacker alone, before it is destroyed	57	* attacked monsters to leave the attacker alone, before it is destroyed
63	*/	58	*/
64	/* 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
65	* 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
66	* again then but perhaps get attack on and on	61	* again then but perhaps get attack on and on
67	* 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
68	* too. */	63	* too. */
69		64
70	if(npc->enemy)	65	if (npc->enemy)
71	{	66	{
72	/* I broke these if's apart to better be able to see what	67	/* I broke these if's apart to better be able to see what
73	* the grouping checks are. Code is the same.	68	* the grouping checks are. Code is the same.
74	*/	69	*/
75	if ( QUERY_FLAG(npc->enemy,FLAG_REMOVED) ||	70	if (QUERY_FLAG (npc->enemy, FLAG_REMOVED) ||
76	QUERY_FLAG(npc->enemy,FLAG_FREED) ||	71	QUERY_FLAG (npc->enemy, FLAG_FREED) ||
77	!on_same_map(npc, npc->enemy) ||	72	!on_same_map (npc, npc->enemy) || npc == npc->enemy || QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (npc->enemy, FLAG_NEUTRAL))
78	npc == npc->enemy ||
79	QUERY_FLAG(npc, FLAG_NEUTRAL) ||
80	QUERY_FLAG(npc->enemy, FLAG_NEUTRAL))
81	npc->enemy = NULL;	73	npc->enemy = 0;
82		74
83	else if (QUERY_FLAG(npc, FLAG_FRIENDLY) && (	75	else if (QUERY_FLAG (npc, FLAG_FRIENDLY) && ((QUERY_FLAG (npc->enemy, FLAG_FRIENDLY)
84	(QUERY_FLAG(npc->enemy, FLAG_FRIENDLY) && !(should_arena_attack(npc, npc->owner, npc->enemy))) ||	76	&& !(should_arena_attack (npc, npc->owner, npc->enemy)))
85	((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)))
86	|| npc->enemy == npc->owner))	78	|| npc->enemy == npc->owner))
87	npc->enemy = NULL;	79	npc->enemy = 0;
88
89
90	else if (!QUERY_FLAG(npc, FLAG_FRIENDLY) &&
91	(!QUERY_FLAG(npc->enemy, FLAG_FRIENDLY) && npc->enemy->type!=PLAYER))
92	npc->enemy=NULL;
93		80
		81
		82	else if (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (npc->enemy, FLAG_FRIENDLY) && npc->enemy->type != PLAYER))
		83	npc->enemy = 0;
		84
94	/* 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
95	* target enemy - this code below makes sure the enemy is something	86	* target enemy - this code below makes sure the enemy is something
96	* that should be attacked. My guess is that the arrow hits	87	* that should be attacked. My guess is that the arrow hits
97	* the creature/owner, and so the creature then takes that	88	* the creature/owner, and so the creature then takes that
98	* as the enemy to attack.	89	* as the enemy to attack.
99	*/	90	*/
100	else if (!QUERY_FLAG(npc->enemy, FLAG_MONSTER) &&	91	else if (!QUERY_FLAG (npc->enemy, FLAG_MONSTER)
101	!QUERY_FLAG(npc->enemy,FLAG_GENERATOR) &&	92	&& !QUERY_FLAG (npc->enemy, FLAG_GENERATOR)
102	npc->enemy->type!=PLAYER && npc->enemy->type != GOLEM)	93	&& npc->enemy->type != PLAYER
103	npc->enemy=NULL;	94	&& npc->enemy->type != GOLEM)
104		95	npc->enemy = 0;
105	}	96	}
		97
106	return can_detect_enemy(npc,npc->enemy,rv)?npc->enemy:NULL;	98	return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : 0;
107	}	99	}
108		100
109	/* Returns the nearest living creature (monster or generator).	101	/* Returns the nearest living creature (monster or generator).
110	* Modified to deal with tiled maps properly.	102	* Modified to deal with tiled maps properly.
111	* 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
…		…
118	* the first few directions, it could very well choose something	110	* the first few directions, it could very well choose something
119	* 3 spaces away even though something directly north is closer.	111	* 3 spaces away even though something directly north is closer.
120	*	112	*
121	* this function is map tile aware.	113	* this function is map tile aware.
122	*/	114	*/
		115	object *
123	object *find_nearest_living_creature(object *npc) {	116	find_nearest_living_creature (object *npc)
		117	{
124	int i,mflags;	118	int i, mflags;
125	sint16 nx,ny;	119	sint16 nx, ny;
126	mapstruct *m;	120	maptile *m;
127	object *tmp;
128	int search_arr[SIZEOFFREE];	121	int search_arr[SIZEOFFREE];
129		122
130	get_search_arr(search_arr);	123	get_search_arr (search_arr);
		124
131	for(i=0;i<SIZEOFFREE;i++) {	125	for (i = 0; i < SIZEOFFREE; i++)
		126	{
132	/* modified to implement smart searching using search_arr	127	/* modified to implement smart searching using search_arr
133	* guidance array to determine direction of search order	128	* guidance array to determine direction of search order
134	*/	129	*/
135	nx = npc->x + freearr_x[search_arr[i]];	130	nx = npc->x + freearr_x[search_arr[i]];
136	ny = npc->y + freearr_y[search_arr[i]];	131	ny = npc->y + freearr_y[search_arr[i]];
137	m = npc->map;	132	m = npc->map;
138		133
139	mflags = get_map_flags(m, &m, nx, ny, &nx, &ny);	134	mflags = get_map_flags (m, &m, nx, ny, &nx, &ny);
		135
140	if (mflags & P_OUT_OF_MAP) continue;	136	if (mflags & P_OUT_OF_MAP)
		137	continue;
141		138
142	if (mflags & P_IS_ALIVE) {	139	if (mflags & P_IS_ALIVE)
143	tmp=get_map_ob(m,nx,ny);	140	{
144	while(tmp!=NULL && !QUERY_FLAG(tmp,FLAG_MONSTER)&&	141	for (object *tmp = m->at (nx, ny).top; tmp; tmp = tmp->below)
145	!QUERY_FLAG(tmp,FLAG_GENERATOR ) && tmp->type!=PLAYER)	142	if (tmp->flag [FLAG_MONSTER] || tmp->flag [FLAG_GENERATOR] || tmp->type == PLAYER)
146	tmp=tmp->above;
147
148	if (!tmp) {
149	LOG(llevDebug,"find_nearest_living_creature: map %s (%d,%d) has is_alive set but did not find a monster?\n",
150	m->path, nx, ny);
151	}
152	else {
153	if(can_see_monsterP(m,nx,ny,i))	143	if (can_see_monsterP (m, nx, ny, i))
154	return tmp;	144	return tmp;
155	}	145	}
156	} /* is something living on this space */
157	}	146	}
158	return NULL; /* nothing found */
159	}
160		147
		148	return 0;
		149	}
161		150
162	/* Tries to find an enmy for npc. We pass the range vector since	151	/* Tries to find an enemy for npc. We pass the range vector since
163	* our caller will find the information useful.	152	* our caller will find the information useful.
164	* Currently, only move_monster calls this function.	153	* Currently, only move_monster calls this function.
165	* Fix function so that we always make calls to get_rangevector	154	* Fix function so that we always make calls to get_rangevector
166	* if we have a valid target - function as not doing so in	155	* if we have a valid target - function as not doing so in
167	* many cases.	156	* many cases.
168	*/	157	*/
169		158	static object *
170	object *find_enemy(object *npc, rv_vector *rv)	159	find_enemy (object *npc, rv_vector * rv)
171	{	160	{
172	object *attacker, *tmp=NULL;	161	object *attacker, *tmp = NULL;
173		162
174	attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */	163	attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */
175	npc->attacked_by = NULL; /* always clear the attacker entry */	164	npc->attacked_by = 0; /* always clear the attacker entry */
176		165
177	/* if we berserk, we don't care about others - we attack all we can find */	166	/* if we berserk, we don't care about others - we attack all we can find */
178	if(QUERY_FLAG(npc,FLAG_BERSERK)) {	167	if (QUERY_FLAG (npc, FLAG_BERSERK))
		168	{
179	tmp = find_nearest_living_creature(npc);	169	tmp = find_nearest_living_creature (npc);
		170
		171	if (tmp)
180	if (tmp) get_rangevector(npc, tmp, rv, 0);	172	get_rangevector (npc, tmp, rv, 0);
		173
181	return tmp;	174	return tmp;
182	}	175	}
183		176
184	/* Here is the main enemy selection.	177	/* Here is the main enemy selection.
185	* We want this: if there is an enemy, attack him until its not possible or	178	* We want this: if there is an enemy, attack him until its not possible or
186	* one of both is dead.	179	* one of both is dead.
187	* If we have no enemy and we are...	180	* If we have no enemy and we are...
188	* a monster: try to find a player, a pet or a friendly monster	181	* a monster: try to find a player, a pet or a friendly monster
189	* a friendly: only target a monster which is targeting you first or targeting a player	182	* a friendly: only target a monster which is targeting you first or targeting a player
190	* a neutral: fight a attacker (but there should be none), then do nothing	183	* a neutral: fight a attacker (but there should be none), then do nothing
191	* a pet: attack player enemy or a monster	184	* a pet: attack player enemy or a monster
192	*/	185	*/
193		186
194	/* pet move */	187	/* pet move */
195	if ((npc->attack_movement & HI4) == PETMOVE) {	188	if ((npc->attack_movement & HI4) == PETMOVE)
		189	{
196	tmp= get_pet_enemy(npc,rv);	190	tmp = get_pet_enemy (npc, rv);
		191
		192	if (tmp)
197	if (tmp) get_rangevector(npc, tmp, rv, 0);	193	get_rangevector (npc, tmp, rv, 0);
		194
198	return tmp;	195	return tmp;
199	}
200		196	}
		197
201	/* we check our old enemy. */	198	/* we check our old enemy. */
202	if((tmp=check_enemy(npc, rv))==NULL)	199	if (!(tmp = check_enemy (npc, rv)))
203	{	200	{
204	if(attacker) /* if we have an attacker, check him */	201	if (attacker) /* if we have an attacker, check him */
205	{	202	{
206	/* we want be sure this is the right one! */	203	/* TODO: that's not finished */
207	if(attacker->count == npc->attacked_by_count)	204	/* we don't want a fight evil vs evil or good against non evil */
		205
		206	if (QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (attacker, FLAG_NEUTRAL) || /* neutral */
		207	(QUERY_FLAG (npc, FLAG_FRIENDLY) && QUERY_FLAG (attacker, FLAG_FRIENDLY)) ||
		208	(!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (attacker, FLAG_FRIENDLY) && attacker->type != PLAYER)))
		209	CLEAR_FLAG (npc, FLAG_SLEEP); /* skip it, but lets wakeup */
		210	else if (on_same_map (npc, attacker)) /* that's the only thing we must know... */
208	{	211	{
209	/* TODO: thats not finished */
210	/* we don't want a fight evil vs evil or good against non evil */
211
212	if( QUERY_FLAG(npc, FLAG_NEUTRAL) || QUERY_FLAG(attacker, FLAG_NEUTRAL) || /* neutral */
213	(QUERY_FLAG(npc, FLAG_FRIENDLY) && QUERY_FLAG(attacker, FLAG_FRIENDLY)) ||
214	(!QUERY_FLAG(npc, FLAG_FRIENDLY) &&
215	(!QUERY_FLAG(attacker, FLAG_FRIENDLY) && attacker->type!=PLAYER)) )
216	CLEAR_FLAG(npc,FLAG_SLEEP); /* skip it, but lets wakeup */
217	else if(on_same_map(npc, attacker)) /* thats the only thing we must know... */
218	{
219	CLEAR_FLAG(npc,FLAG_SLEEP); /* well, NOW we really should wake up! */	212	CLEAR_FLAG (npc, FLAG_SLEEP); /* well, NOW we really should wake up! */
220	npc->enemy = attacker;	213	npc->enemy = attacker;
221	return attacker; /* yes, we face our attacker! */	214	return attacker; /* yes, we face our attacker! */
222	}
223	}	215	}
224	}	216	}
225		217
226	/* we have no legal enemy or attacker, so we try to target a new one */	218	/* we have no legal enemy or attacker, so we try to target a new one */
227	if(!QUERY_FLAG(npc, FLAG_UNAGGRESSIVE) && !QUERY_FLAG(npc, FLAG_FRIENDLY) &&	219	if (!QUERY_FLAG (npc, FLAG_UNAGGRESSIVE) && !QUERY_FLAG (npc, FLAG_FRIENDLY) && !QUERY_FLAG (npc, FLAG_NEUTRAL))
228	!QUERY_FLAG(npc, FLAG_NEUTRAL))
229	{	220	{
230	npc->enemy = get_nearest_player(npc);	221	npc->enemy = get_nearest_player (npc);
231	if (npc->enemy)	222	if (npc->enemy)
232	tmp = check_enemy(npc,rv);	223	tmp = check_enemy (npc, rv);
233	}
234		224	}
235	}
236		225
		226	}
		227
237	return tmp;	228	return tmp;
238	}	229	}
239		230
240	/* Sees if this monster should wake up.	231	/* Sees if this monster should wake up.
241	* Currently, this is only called from move_monster, and	232	* Currently, this is only called from move_monster, and
242	* if enemy is set, then so should be rv.	233	* if enemy is set, then so should be rv.
243	* returns 1 if the monster should wake up, 0 otherwise.	234	* returns 1 if the monster should wake up, 0 otherwise.
244	*/	235	*/
245		236	static int
246	int check_wakeup(object *op, object *enemy, rv_vector *rv) {	237	check_wakeup (object *op, object *enemy, rv_vector *rv)
247	int radius = op->stats.Wis>MIN_MON_RADIUS?op->stats.Wis:MIN_MON_RADIUS;	238	{
248
249	/* Trim work - if no enemy, no need to do anything below */	239	/* Trim work - if no enemy, no need to do anything below */
250	if (!enemy) return 0;	240	if (!enemy)
		241	return 0;
251		242
		243	if (!op->flag [FLAG_SLEEP])
		244	return 1;
		245
		246	int radius = max (op->stats.Wis, MIN_MON_RADIUS);
		247
		248	if (op->flag [FLAG_BLIND])
252	/* blinded monsters can only find nearby objects to attack */	249	/* blinded monsters can only find nearby objects to attack */
253	if(QUERY_FLAG(op, FLAG_BLIND))
254	radius = MIN_MON_RADIUS;	250	radius = MIN_MON_RADIUS;
255		251	else if (op->map
		252	&& !enemy->invisible
		253	&& !stand_in_light (enemy)
		254	&& (!op->flag[FLAG_SEE_IN_DARK] || !op->flag [FLAG_SEE_INVISIBLE]))
256	/* This covers the situation where the monster is in the dark	255	/* This covers the situation where the monster is in the dark
257	* 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
258	* glowing!) then the monster has trouble finding the enemy.	257	* glowing!) then the monster has trouble finding the enemy.
259	* 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
260	* the dark. */	259	* the dark. */
		260	radius = min (radius, MIN_MON_RADIUS + MAX_DARKNESS - op->map->darklevel ());
261		261
262	else if(op->map && op->map->darkness>0 && enemy && !enemy->invisible &&	262	if (enemy->flag [FLAG_STEALTH])
263	!stand_in_light(enemy) &&	263	radius = radius / 2 + 1;
264	(!QUERY_FLAG(op,FLAG_SEE_IN_DARK) || !QUERY_FLAG(op,FLAG_SEE_INVISIBLE))) {
265	int dark = radius/(op->map->darkness);
266	radius = (dark>MIN_MON_RADIUS)?(dark+1):MIN_MON_RADIUS;
267	}
268	else if(!QUERY_FLAG(op,FLAG_SLEEP)) return 1;
269		264
270	/* 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
271	* for that.	266	* for that.
272	*/	267	*/
273	if (rv->distance < (unsigned int) (QUERY_FLAG(enemy, FLAG_STEALTH) ? (radius / 2) + 1 : radius)) {	268	if (rv->distance <= radius)
		269	{
274	CLEAR_FLAG(op,FLAG_SLEEP);	270	CLEAR_FLAG (op, FLAG_SLEEP);
275	return 1;	271	return 1;
276	}	272	}
		273
277	return 0;	274	return 0;
278	}	275	}
279		276
		277	int
280	int move_randomly(object *op) {	278	move_randomly (object *op)
281	int i;	279	{
282
283	/* Give up to 15 chances for a monster to move randomly */	280	/* Give up to 15 chances for a monster to move randomly */
284	for(i=0;i<15;i++) {	281	for (int i = 0; i < 15; i++)
285	if(move_object(op,RANDOM()%8+1))	282	if (move_object (op, rndm (8) + 1))
286	return 1;	283	return 1;
287	}	284
288	return 0;	285	return 0;
289	}	286	}
290		287
291	/*	288	/*
292	* 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.
293	*/	293	*/
		294	static int
		295	monster_can_pick (object *monster, object *item)
		296	{
		297	int flag = 0;
		298	int i;
294		299
295	int move_monster(object *op) {	300	if (!can_pick (monster, item))
296	int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */
297	object *owner, *enemy, *part, *oph=op;
298	rv_vector rv;
299
300	/* Monsters not on maps don't do anything. These monsters are things
301	* Like royal guards in city dwellers inventories.
302	*/
303	if (!op->map) return 0;
304
305	/* for target facing, we copy this value here for fast access */
306	if(oph->head) /* force update the head - one arch one pic */
307	oph = oph->head;
308
309	if (QUERY_FLAG(op, FLAG_NO_ATTACK)) /* we never ever attack */
310	enemy = op->enemy = NULL;
311	else if((enemy= find_enemy(op, &rv)))
312	{
313	/* we have an enemy, just tell him we want him dead */
314	enemy->attacked_by = op; /* our ptr */
315	enemy->attacked_by_count = op->count; /* our tag */
316	}
317
318	/* generate hp, if applicable */
319	if(op->stats.Con > 0 && op->stats.hp < op->stats.maxhp) {
320
321	/* last heal is in funny units. Dividing by speed puts
322	* the regeneration rate on a basis of time instead of
323	* #moves the monster makes. The scaling by 8 is
324	* to capture 8th's of a hp fraction regens
325	*
326	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
327	* overflow might produce monsters with negative hp.
328	*/
329
330	op->last_heal+= (int)((float)(8*op->stats.Con)/FABS(op->speed));
331	op->stats.hp = MIN((sint32)op->stats.hp+op->last_heal/32, op->stats.maxhp); /* causes Con/4 hp/tick */
332	op->last_heal%=32;
333
334	/* So if the monster has gained enough HP that they are no longer afraid */
335	if (QUERY_FLAG(op,FLAG_RUN_AWAY) &&
336	op->stats.hp >= (signed short)(((float)op->run_away/(float)100)*
337	(float)op->stats.maxhp))
338	CLEAR_FLAG(op, FLAG_RUN_AWAY);
339
340	if(op->stats.hp>op->stats.maxhp)
341	op->stats.hp=op->stats.maxhp;
342	}
343
344	/* generate sp, if applicable */
345	if(op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp) {
346
347	/* last_sp is in funny units. Dividing by speed puts
348	* the regeneration rate on a basis of time instead of
349	* #moves the monster makes. The scaling by 8 is
350	* to capture 8th's of a sp fraction regens
351	*
352	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
353	* overflow might produce monsters with negative sp.
354	*/
355
356	op->last_sp+= (int)((float)(8*op->stats.Pow)/FABS(op->speed));
357	op->stats.sp = MIN(op->stats.sp+op->last_sp/128, op->stats.maxsp); /* causes Pow/16 sp/tick */
358	op->last_sp%=128;
359	}
360
361	/* this should probably get modified by many more values.
362	* (eg, creatures resistance to fear, level, etc. )
363	*/
364	if(QUERY_FLAG(op, FLAG_SCARED) &&!(RANDOM()%20)) {
365	CLEAR_FLAG(op,FLAG_SCARED); /* Time to regain some "guts"... */
366	}
367
368	if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
369	return QUERY_FLAG (op, FLAG_FREED);
370
371	if ( QUERY_FLAG(op, FLAG_SLEEP) || QUERY_FLAG(op, FLAG_BLIND) ||
372	((op->map->darkness>0) && !QUERY_FLAG(op,FLAG_SEE_IN_DARK) &&
373	!QUERY_FLAG(op,FLAG_SEE_INVISIBLE))) {
374	if(!check_wakeup(op,enemy,&rv))
375	return 0;
376	}
377
378	/* check if monster pops out of hidden spot */
379	if(op->hide) do_hidden_move(op);
380
381	if(op->pick_up)
382	monster_check_pickup(op);
383
384	if(op->will_apply)
385	monster_apply_below(op); /* Check for items to apply below */
386
387	/* If we don't have an enemy, do special movement or the like */
388	if(!enemy) {
389	if(QUERY_FLAG(op, FLAG_ONLY_ATTACK)) {
390	remove_ob(op);
391	free_object(op);
392	return 1;
393	}
394
395	/* Probably really a bug for a creature to have both
396	* stand still and a movement type set.
397	*/
398	if(!QUERY_FLAG(op, FLAG_STAND_STILL)) {
399	if (op->attack_movement & HI4)
400	{
401	switch (op->attack_movement & HI4) {
402	case (PETMOVE):
403	pet_move (op);
404	break;
405
406	case (CIRCLE1):
407	circ1_move (op);
408	break;
409
410	case (CIRCLE2):
411	circ2_move (op);
412	break;
413
414	case (PACEV):
415	pace_movev(op);
416	break;
417
418	case (PACEH):
419	pace_moveh(op);
420	break;
421
422	case (PACEV2):
423	pace2_movev (op);
424	break;
425
426	case (PACEH2):
427	pace2_moveh (op);
428	break;
429
430	case (RANDO):
431	rand_move (op);
432	break;
433
434	case (RANDO2):
435	move_randomly (op);
436	break;
437	}
438	return 0;
439	}
440	else if (QUERY_FLAG(op,FLAG_RANDOM_MOVE))
441	(void) move_randomly(op);
442
443	} /* stand still */
444	return 0;
445	} /* no enemy */
446
447	/* We have an enemy. Block immediately below is for pets */
448	if((op->attack_movement&HI4) == PETMOVE && (owner = get_owner(op)) != NULL && !on_same_map(op,owner))
449	return follow_owner(op, owner);
450
451	/* doppleganger code to change monster facing to that of the nearest
452	* player. Hmm. The code is here, but no monster in the current
453	* arch set uses it.
454	*/
455	if ( (op->race != NULL)&& strcmp(op->race,"doppleganger") == 0)
456	{
457	op->face = enemy->face;
458	op->name = enemy->name;
459	}
460
461	/* Calculate range information for closest body part - this
462	* is used for the 'skill' code, which isn't that smart when
463	* it comes to figuring it out - otherwise, giants throw boulders
464	* into themselves.
465	*/
466	get_rangevector(op, enemy, &rv, 0);
467
468	/* Move the check for scared up here - if the monster was scared,
469	* we were not doing any of the logic below, so might as well save
470	* a few cpu cycles.
471	*/
472	if (!QUERY_FLAG(op, FLAG_SCARED))
473	{
474	rv_vector rv1;
475
476	/* now we test every part of an object .... this is a real ugly piece of code */
477	for (part=op; part!=NULL; part=part->more) {
478	get_rangevector(part, enemy, &rv1, 0x1);
479	dir=rv1.direction;
480
481	/* hm, not sure about this part - in original was a scared flag here too
482	* but that we test above... so can be old code here
483	*/
484	if(QUERY_FLAG(op,FLAG_RUN_AWAY))
485	dir=absdir(dir+4);
486	if(QUERY_FLAG(op,FLAG_CONFUSED))
487	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);
488
489	if(QUERY_FLAG(op,FLAG_CAST_SPELL) && !(RANDOM()%3)) {
490	if(monster_cast_spell(op,part,enemy,dir,&rv1))
491	return 0;
492	}
493
494	if(QUERY_FLAG(op,FLAG_READY_SCROLL) && !(RANDOM()%3)) {
495	if(monster_use_scroll(op,part,enemy,dir,&rv1))
496	return 0;
497	}
498
499	if(QUERY_FLAG(op,FLAG_READY_RANGE)&&!(RANDOM()%3)) {
500	if(monster_use_range(op,part,enemy,dir))
501	return 0;
502	}
503	if(QUERY_FLAG(op,FLAG_READY_SKILL)&&!(RANDOM()%3)) {
504	if(monster_use_skill(op,rv.part,enemy,rv.direction))
505	return 0;
506	}
507	if(QUERY_FLAG(op,FLAG_READY_BOW)&&!(RANDOM()%2)) {
508	if(monster_use_bow(op,part,enemy,dir))
509	return 0;
510	}
511	} /* for processing of all parts */
512	} /* If not scared */
513
514
515	part = rv.part;
516	dir=rv.direction;
517
518	if(QUERY_FLAG(op, FLAG_SCARED) || QUERY_FLAG(op,FLAG_RUN_AWAY))
519	dir=absdir(dir+4);
520
521	if(QUERY_FLAG(op,FLAG_CONFUSED))
522	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);
523
524	pre_att_dir = dir; /* remember the original direction */
525
526	if ((op->attack_movement & LO4) && !QUERY_FLAG(op, FLAG_SCARED))
527	{
528	switch (op->attack_movement & LO4) {
529	case DISTATT:
530	dir = dist_att (dir,op,enemy,part,&rv);
531	break;
532
533	case RUNATT:
534	dir = run_att (dir,op,enemy,part,&rv);
535	break;
536
537	case HITRUN:
538	dir = hitrun_att(dir,op,enemy);
539	break;
540
541	case WAITATT:
542	dir = wait_att (dir,op,enemy,part,&rv);
543	break;
544
545	case RUSH: /* default - monster normally moves towards player */
546	case ALLRUN:
547	break;
548
549	case DISTHIT:
550	dir = disthit_att (dir,op,enemy,part,&rv);
551	break;
552
553	case WAIT2:
554	dir = wait_att2 (dir,op,enemy,part,&rv);
555	break;
556
557	default:
558	LOG(llevDebug,"Illegal low mon-move: %d\n",op->attack_movement & LO4);
559	}
560	}
561
562	if (!dir)
563	return 0;	301	return 0;
564		302
565	if (!QUERY_FLAG(op,FLAG_STAND_STILL)) {	303	if (QUERY_FLAG (item, FLAG_UNPAID))
566	if(move_object(op,dir)) /* Can the monster move directly toward player? */	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.
		365	*/
		366	for (i = 0; i < NUM_BODY_LOCATIONS; i++)
		367	{
		368	if (monster->slot[i].info && item->slot[i].info)
567	{	369	{
568	/* elmex: Turn our monster after it moved if it has DISTATT attack */	370	flag = 1;
569	if ((op->attack_movement & LO4) == DISTATT)	371	break;
570	op->direction = pre_att_dir;
571
572	return 0;
573	}	372	}
574
575	if(QUERY_FLAG(op, FLAG_SCARED) || !can_hit(part,enemy,&rv)
576	|| QUERY_FLAG(op,FLAG_RUN_AWAY)) {
577
578	/* Try move around corners if !close */
579	int maxdiff = (QUERY_FLAG(op, FLAG_ONLY_ATTACK) || RANDOM()&1) ? 1 : 2;
580	for(diff = 1; diff <= maxdiff; diff++) {
581	/* try different detours */
582	int m = 1-(RANDOM()&2); /* Try left or right first? */
583	if(move_object(op,absdir(dir + diff*m)) ||
584	move_object(op,absdir(dir - diff*m)))
585	return 0;
586	}
587	}
588	} /* if monster is not standing still */
589
590	/* elmex: Turn our monster after it moved if it has DISTATT attack */
591	if ((op->attack_movement & LO4) == DISTATT)
592	op->direction = pre_att_dir;
593
594	/*
595	* Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
596	* direction if they can't move away.
597	*/
598	if (!QUERY_FLAG(op, FLAG_ONLY_ATTACK)&&(QUERY_FLAG(op,FLAG_RUN_AWAY)||QUERY_FLAG(op, FLAG_SCARED)))
599	if(move_randomly(op))
600	return 0;
601
602	/*
603	* Try giving the monster a new enemy - the player that is closest
604	* to it. In this way, it won't just keep trying to get to a target
605	* that is inaccessible.
606	* This could be more clever - it should go through a list of several
607	* enemies, as it is now, you could perhaps get situations where there
608	* are two players flanking the monster at close distance, but which
609	* the monster can't get to, and a third one at a far distance that
610	* the monster could get to - as it is, the monster won't look at that
611	* third one.
612	*/
613	if (!QUERY_FLAG(op, FLAG_FRIENDLY) && enemy == op->enemy)
614	{	373	}
615	object *nearest_player = get_nearest_player(op);
616	if (nearest_player && nearest_player != enemy && !can_hit(part,enemy,&rv)) {
617	op->enemy = NULL;
618	enemy = nearest_player;
619	}
620	}
621		374
622	if(!QUERY_FLAG(op, FLAG_SCARED)&&can_hit(part,enemy,&rv))	375	if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
623	{
624	/* The adjustement to wc that was here before looked totally bogus -
625	* since wc can in fact get negative, that would mean by adding
626	* the current wc, the creature gets better? Instead, just
627	* add a fixed amount - nasty creatures that are runny away should
628	* still be pretty nasty.
629	*/
630	if(QUERY_FLAG(op,FLAG_RUN_AWAY))
631	{
632	part->stats.wc+=10;
633	(void)skill_attack(enemy,part,0,NULL, NULL);
634	part->stats.wc-=10;
635	}
636	else
637	(void)skill_attack(enemy,part,0,NULL, NULL);
638	} /* if monster is in attack range */
639
640	if(QUERY_FLAG(part,FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
641	return 1;	376	return 1;
642		377
643	if(QUERY_FLAG(op, FLAG_ONLY_ATTACK))	378	return 0;
		379	}
		380
		381	/*
		382	* monster_check_pickup(): checks for items that monster can pick up.
		383	*
		384	* Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
		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;
		400
		401	for (tmp = monster->below; tmp != NULL; tmp = next)
644	{	402	{
645	remove_ob(op);	403	next = tmp->below;
646	free_object(op);	404	if (monster_can_pick (monster, tmp))
		405	{
		406	tmp->remove ();
		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.
		412	*/
		413	if (next && next->destroyed ())
647	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)
648	}	430	{
649	return 0;	431	next = tmp->below;
650	}	432	switch (tmp->type)
		433	{
		434	case T_HANDLE:
		435	case TRIGGER:
		436	if (monster->will_apply & 1)
		437	manual_apply (monster, tmp, 0);
		438	break;
651		439
652	int can_hit(object *ob1,object *ob2, rv_vector *rv) {	440	case TREASURE:
653	object *more;	441	if (monster->will_apply & 2)
654	rv_vector rv1;	442	manual_apply (monster, tmp, 0);
		443	break;
655		444
656	if(QUERY_FLAG(ob1,FLAG_CONFUSED)&&!(RANDOM()%3))	445	}
657	return 0;	446	if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
658		447	break;
659	if (abs(rv->distance_x)<2&&abs(rv->distance_y)<2) return 1;
660
661	/* check all the parts of ob2 - just because we can't get to
662	* its head doesn't mean we don't want to pound its feet
663	*/
664	for (more = ob2->more; more!=NULL; more = more->more) {
665	get_rangevector(ob1, more, &rv1, 0);
666	if (abs(rv1.distance_x)<2&&abs(rv1.distance_y)<2) return 1;
667	}	448	}
668	return 0;
669
670	}	449	}
671		450
672	/* Returns 1 is monster should cast spell sp at an enemy	451	/* Returns 1 is monster should cast spell sp at an enemy
673	* Returns 0 if the monster should not cast this spell.	452	* Returns 0 if the monster should not cast this spell.
674	*	453	*
…		…
682	*	461	*
683	* 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,
684	* 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,
685	* the right type of healing spell could be useful.	464	* the right type of healing spell could be useful.
686	*/	465	*/
687		466	static int
688	static int monster_should_cast_spell(object *monster, object *spell_ob)	467	monster_should_cast_spell (object *monster, object *spell_ob)
689	{	468	{
690	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||	469	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||
691	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||	470	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||
692	spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||	471	spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||
693	spell_ob->subtype == SP_MAGIC_MISSILE || spell_ob->subtype == SP_SUMMON_GOLEM ||	472	spell_ob->subtype == SP_MAGIC_MISSILE || spell_ob->subtype == SP_SUMMON_GOLEM ||
694	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 ||
695	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM ||	474	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE)
696	spell_ob->subtype == SP_INVISIBLE)	475	return 1;
697		476
		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)
698	return 1;	696	return 1;
		697	}
699		698
700	return 0;	699	return 0;
701	}	700	}
702		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;
		869	}
703		870
704	#define MAX_KNOWN_SPELLS 20	871	#define MAX_KNOWN_SPELLS 20
705		872
706	/* Returns a randomly selected spell. This logic is still	873	/* Returns a randomly selected spell. This logic is still
707	* less than ideal. This code also only seems to deal with	874	* less than ideal. This code also only seems to deal with
708	* wizard spells, as the check is against sp, and not grace.	875	* wizard spells, as the check is against sp, and not grace.
709	* can mosnters know cleric spells?	876	* can mosnters know cleric spells?
710	*/	877	*/
		878	object *
711	object *monster_choose_random_spell(object *monster) {	879	monster_choose_random_spell (object *monster)
		880	{
712	object *altern[MAX_KNOWN_SPELLS];	881	object *altern[MAX_KNOWN_SPELLS];
713	object *tmp;
714	int i=0;	882	int i = 0;
715		883
716	for(tmp=monster->inv;tmp!=NULL;tmp=tmp->below)	884	for (object *tmp = monster->inv; tmp; tmp = tmp->below)
717	if (tmp->type==SPELLBOOK || tmp->type==SPELL) {	885	if (tmp->type == SPELLBOOK || tmp->type == SPELL)
		886	{
718	/* Check and see if it's actually a useful spell.	887	/* Check and see if it's actually a useful spell.
719	* If its a spellbook, the spell is actually the inventory item.	888	* If its a spellbook, the spell is actually the inventory item.
720	* if it is a spell, then it is just the object itself.	889	* if it is a spell, then it is just the object itself.
721	*/	890	*/
722	if (monster_should_cast_spell(monster, (tmp->type==SPELLBOOK)?tmp->inv:tmp)) {	891	if (monster_should_cast_spell (monster, (tmp->type == SPELLBOOK) ? tmp->inv : tmp))
		892	{
723	altern[i++]=tmp;	893	altern [i++] = tmp;
		894
724	if(i==MAX_KNOWN_SPELLS)	895	if (i == MAX_KNOWN_SPELLS)
725	break;	896	break;
726	}	897	}
727	}	898	}
728	if(!i)	899
729	return NULL;	900	return i ? altern [rndm (i)] : 0;
730	return altern[RANDOM()%i];
731	}	901	}
732		902
733	/* This checks to see if the monster should cast a spell/ability.	903	/* This checks to see if the monster should cast a spell/ability.
734	* it returns true if the monster casts a spell, 0 if he doesn't.	904	* it returns true if the monster casts a spell, 0 if he doesn't.
735	* head is the head of the monster.	905	* head is the head of the monster.
736	* part is the part of the monster we are checking against.	906	* part is the part of the monster we are checking against.
737	* pl is the target.	907	* pl is the target.
738	* dir is the direction to case.	908	* dir is the direction to case.
739	* rv is the vector which describes where the enemy is.	909	* rv is the vector which describes where the enemy is.
740	*/	910	*/
741		911	int
742	int monster_cast_spell(object *head, object *part,object *pl,int dir, rv_vector *rv) {	912	monster_cast_spell (object *head, object *part, object *pl, int dir, rv_vector * rv)
		913	{
743	object *spell_item;	914	object *spell_item;
744	object *owner;	915	object *owner;
745	rv_vector rv1;	916	rv_vector rv1;
746		917
747	/* If you want monsters to cast spells over friends, this spell should	918	/* If you want monsters to cast spells over friends, this spell should
748	* be removed. It probably should be in most cases, since monsters still	919	* be removed. It probably should be in most cases, since monsters still
749	* don't care about residual effects (ie, casting a cone which may have a	920	* don't care about residual effects (ie, casting a cone which may have a
750	* clear path to the player, the side aspects of the code will still hit	921	* clear path to the player, the side aspects of the code will still hit
751	* other monsters)	922	* other monsters)
752	*/	923	*/
753	if(!(dir=path_to_player(part,pl,0)))	924	if (!(dir = path_to_player (part, pl, 0)))
754	return 0;	925	return 0;
		926
		927	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
755		928	{
756	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {
757	get_rangevector(head, owner, &rv1, 0x1);	929	get_rangevector (head, owner, &rv1, 0x1);
758	if(dirdiff(dir,rv1.direction) < 2) {	930	if (dirdiff (dir, rv1.direction) < 2)
759	return 0; /* Might hit owner with spell */	931	return 0; /* Might hit owner with spell */
760	}
761	}	932	}
762		933
763	if(QUERY_FLAG(head,FLAG_CONFUSED))	934	if (QUERY_FLAG (head, FLAG_CONFUSED))
764	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	935	dir = absdir (dir + rndm (3) + rndm (3) - 2);
765		936
766	/* If the monster hasn't already chosen a spell, choose one	937	/* If the monster hasn't already chosen a spell, choose one
767	* I'm not sure if it really make sense to pre-select spells (events	938	* I'm not sure if it really make sense to pre-select spells (events
768	* could be different by the time the monster goes again).	939	* could be different by the time the monster goes again).
769	*/	940	*/
770	if(head->spellitem==NULL) {	941	if (head->spellitem == NULL)
		942	{
771	if((spell_item=monster_choose_random_spell(head))==NULL) {	943	if ((spell_item = monster_choose_random_spell (head)) == NULL)
		944	{
772	LOG(llevMonster,"Turned off spells in %s\n",&head->name);	945	LOG (llevMonster, "Turned off spells in %s\n", &head->name);
773	CLEAR_FLAG(head, FLAG_CAST_SPELL); /* Will be turned on when picking up book */	946	CLEAR_FLAG (head, FLAG_CAST_SPELL); /* Will be turned on when picking up book */
774	return 0;	947	return 0;
775	}	948	}
		949
776	if (spell_item->type == SPELLBOOK) {	950	if (spell_item->type == SPELLBOOK)
		951	{
777	if (!spell_item->inv) {	952	if (!spell_item->inv)
		953	{
778	LOG(llevError,"spellbook %s does not contain a spell?\n", &spell_item->name);	954	LOG (llevError, "spellbook %s does not contain a spell?\n", &spell_item->name);
779	return 0;	955	return 0;
780	}	956	}
		957
781	spell_item=spell_item->inv;	958	spell_item = spell_item->inv;
782	}	959	}
783	}	960	}
784	else	961	else
785	spell_item=head->spellitem;	962	spell_item = head->spellitem;
786		963
787	if (!spell_item) return 0;	964	if (!spell_item)
		965	return 0;
788		966
789	/* Best guess this is a defensive/healing spell */	967	/* Best guess this is a defensive/healing spell */
790	if (spell_item->range<=1 || spell_item->stats.dam < 0)	968	if (spell_item->range <= 1 || spell_item->stats.dam < 0)
791	dir = 0;	969	dir = 0;
792		970
793	/* Monster doesn't have enough spell-points */	971	/* Monster doesn't have enough spell-points */
794	if(head->stats.sp<SP_level_spellpoint_cost(head,spell_item, SPELL_MANA))	972	if (head->stats.sp < SP_level_spellpoint_cost (head, spell_item, SPELL_MANA))
795	return 0;	973	return 0;
796		974
797	if(head->stats.grace<SP_level_spellpoint_cost(head,spell_item, SPELL_GRACE))	975	if (head->stats.grace < SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE))
798	return 0;	976	return 0;
799		977
800	head->stats.sp-=SP_level_spellpoint_cost(head,spell_item, SPELL_MANA);	978	head->stats.sp -= SP_level_spellpoint_cost (head, spell_item, SPELL_MANA);
801	head->stats.grace-=SP_level_spellpoint_cost(head,spell_item, SPELL_GRACE);	979	head->stats.grace -= SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE);
802		980
803	/* set this to null, so next time monster will choose something different */	981	/* set this to null, so next time monster will choose something different */
804	head->spellitem = NULL;	982	head->spellitem = NULL;
805		983
806	return cast_spell(part,part,dir, spell_item, NULL);	984	return cast_spell (part, part, dir, spell_item, NULL);
807	}	985	}
808		986
809		987	int
810	int monster_use_scroll(object *head, object *part,object *pl,int dir, rv_vector *rv) {	988	monster_use_scroll (object *head, object *part, object *pl, int dir, rv_vector * rv)
		989	{
811	object *scroll;	990	object *scroll;
812	object *owner;	991	object *owner;
813	rv_vector rv1;	992	rv_vector rv1;
814		993
815	/* If you want monsters to cast spells over friends, this spell should	994	/* If you want monsters to cast spells over friends, this spell should
816	* be removed. It probably should be in most cases, since monsters still	995	* be removed. It probably should be in most cases, since monsters still
817	* don't care about residual effects (ie, casting a cone which may have a	996	* don't care about residual effects (ie, casting a cone which may have a
818	* clear path to the player, the side aspects of the code will still hit	997	* clear path to the player, the side aspects of the code will still hit
819	* other monsters)	998	* other monsters)
820	*/	999	*/
821	if(!(dir=path_to_player(part,pl,0)))	1000	if (!(dir = path_to_player (part, pl, 0)))
822	return 0;	1001	return 0;
		1002
		1003	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
823		1004	{
824	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {
825	get_rangevector(head, owner, &rv1, 0x1);	1005	get_rangevector (head, owner, &rv1, 0x1);
826	if(dirdiff(dir,rv1.direction) < 2) {	1006	if (dirdiff (dir, rv1.direction) < 2)
827	return 0; /* Might hit owner with spell */
828	}	1007	{
		1008	return 0; /* Might hit owner with spell */
		1009	}
829	}	1010	}
830		1011
831	if(QUERY_FLAG(head,FLAG_CONFUSED))	1012	if (QUERY_FLAG (head, FLAG_CONFUSED))
832	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	1013	dir = absdir (dir + rndm (3) + rndm (3) - 2);
833		1014
834	for (scroll=head->inv; scroll; scroll=scroll->below)	1015	for (scroll = head->inv; scroll; scroll = scroll->below)
835	if (scroll->type == SCROLL && monster_should_cast_spell(head, scroll->inv)) break;	1016	if (scroll->type == SCROLL && monster_should_cast_spell (head, scroll->inv))
		1017	break;
836		1018
837	/* Used up all his scrolls, so nothing do to */	1019	/* Used up all his scrolls, so nothing do to */
838	if (!scroll) {	1020	if (!scroll)
		1021	{
839	CLEAR_FLAG(head, FLAG_READY_SCROLL);	1022	CLEAR_FLAG (head, FLAG_READY_SCROLL);
840	return 0;	1023	return 0;
841	}	1024	}
842		1025
843	/* Spell should be cast on caster (ie, heal, strength) */	1026	/* Spell should be cast on caster (ie, heal, strength) */
844	if (scroll->inv->range==0)	1027	if (scroll->inv->range == 0)
845	dir = 0;	1028	dir = 0;
846		1029
847	apply_scroll(part, scroll, dir);	1030	apply_scroll (part, scroll, dir);
848	return 1;	1031	return 1;
849	}	1032	}
850		1033
851	/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.	1034	/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.
852	* Note that monsters do not need the skills SK_MELEE_WEAPON and	1035	* Note that monsters do not need the skills SK_MELEE_WEAPON and
853	* SK_MISSILE_WEAPON to make those respective attacks, if we	1036	* SK_MISSILE_WEAPON to make those respective attacks, if we
…		…
856	*	1039	*
857	* The skills we are treating here are all but those. -b.t.	1040	* The skills we are treating here are all but those. -b.t.
858	*	1041	*
859	* At the moment this is only useful for throwing, perhaps for	1042	* At the moment this is only useful for throwing, perhaps for
860	* stealing. TODO: This should be more integrated in the game. -MT, 25.11.01	1043	* stealing. TODO: This should be more integrated in the game. -MT, 25.11.01
861	*/	1044	*/
862		1045	int
863	int monster_use_skill(object *head, object *part, object *pl,int dir) {	1046	monster_use_skill (object *head, object *part, object *pl, int dir)
		1047	{
864	object *skill, *owner;	1048	object *skill, *owner;
865		1049
866	if(!(dir=path_to_player(part,pl,0)))	1050	if (!(dir = path_to_player (part, pl, 0)))
867	return 0;	1051	return 0;
868		1052
869	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	1053	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
		1054	{
870	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	1055	int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
		1056
871	if(dirdiff(dir,dir2) < 1)	1057	if (dirdiff (dir, dir2) < 1)
872	return 0; /* Might hit owner with skill -thrown rocks for example ?*/	1058	return 0; /* Might hit owner with skill -thrown rocks for example ? */
873	}	1059	}
		1060
874	if(QUERY_FLAG(head,FLAG_CONFUSED))	1061	if (QUERY_FLAG (head, FLAG_CONFUSED))
875	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	1062	dir = absdir (dir + rndm (3) + rndm (3) - 2);
876		1063
877	/* skill selection - monster will use the next unused skill.	1064	/* skill selection - monster will use the next unused skill.
878	* well...the following scenario will allow the monster to	1065	* well...the following scenario will allow the monster to
879	* toggle between 2 skills. One day it would be nice to make	1066	* toggle between 2 skills. One day it would be nice to make
880	* more skills available to monsters.	1067	* more skills available to monsters.
881	*/	1068	*/
882
883	for(skill=head->inv;skill!=NULL;skill=skill->below)	1069	for (skill = head->inv; skill; skill = skill->below)
884	if(skill->type==SKILL && skill!=head->chosen_skill) {	1070	if (skill->type == SKILL && skill != head->chosen_skill)
		1071	{
885	head->chosen_skill=skill;	1072	head->chosen_skill = skill;
886	break;	1073	break;
887	}	1074	}
888		1075
889	if(!skill && !head->chosen_skill) {	1076	if (!skill && !head->chosen_skill)
		1077	{
890	LOG(llevDebug,"Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n",	1078	LOG (llevDebug, "Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n", &head->name, head->count);
891	&head->name,head->count);
892	CLEAR_FLAG(head, FLAG_READY_SKILL);	1079	CLEAR_FLAG (head, FLAG_READY_SKILL);
893	return 0;	1080	return 0;
894	}	1081	}
		1082
895	/* use skill */	1083	/* use skill */
896	return do_skill(head, part, head->chosen_skill,dir,NULL);	1084	return do_skill (head, part, head->chosen_skill, dir, NULL);
897	}	1085	}
898		1086
899	/* Monster will use a ranged spell attack. */	1087	/* Monster will use a ranged spell attack. */
900		1088	int
901	int monster_use_range(object *head,object *part,object *pl,int dir)	1089	monster_use_range (object *head, object *part, object *pl, int dir)
902	{	1090	{
903	object *wand, *owner;	1091	object *wand, *owner;
904	int at_least_one = 0;	1092	int at_least_one = 0;
905		1093
906	if(!(dir=path_to_player(part,pl,0)))	1094	if (!(dir = path_to_player (part, pl, 0)))
907	return 0;	1095	return 0;
908		1096
909	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	1097	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
		1098	{
910	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	1099	int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
		1100
911	if(dirdiff(dir,dir2) < 2)	1101	if (dirdiff (dir, dir2) < 2)
912	return 0; /* Might hit owner with spell */	1102	return 0; /* Might hit owner with spell */
913	}	1103	}
		1104
914	if(QUERY_FLAG(head,FLAG_CONFUSED))	1105	if (QUERY_FLAG (head, FLAG_CONFUSED))
915	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	1106	dir = absdir (dir + rndm (3) + rndm (3) - 2);
916		1107
917	for(wand=head->inv;wand!=NULL;wand=wand->below)	1108	for (wand = head->inv; wand; wand = wand->below)
918	{	1109	{
919	if (wand->type == WAND)	1110	if (wand->type == WAND)
		1111	{
		1112	/* Found a wand, let's see if it has charges left */
		1113	at_least_one = 1;
		1114	if (wand->stats.food <= 0)
		1115	continue;
		1116
		1117	cast_spell (head, wand, dir, wand->inv, NULL);
		1118
		1119	if (!(--wand->stats.food))
920	{	1120	{
921	/* Found a wand, let's see if it has charges left */	1121	if (wand->arch)
922	at_least_one = 1;
923	if( wand->stats.food<=0 )
924	continue;
925
926	cast_spell( head, wand, dir, wand->inv, NULL );
927
928	if ( !( --wand->stats.food ) )
929	{	1122	{
930	if ( wand->arch )
931	{
932	CLEAR_FLAG(wand, FLAG_ANIMATE);	1123	CLEAR_FLAG (wand, FLAG_ANIMATE);
933	wand->face = wand->arch->clone.face;	1124	wand->face = wand->arch->face;
934	wand->speed = 0;	1125	wand->set_speed (0);
935	update_ob_speed(wand);
936	}
937	}	1126	}
938	/* Success */
939	return 1;
940	}	1127	}
		1128	/* Success */
		1129	return 1;
		1130	}
941	else if ( wand->type == ROD || wand->type==HORN ) {	1131	else if (wand->type == ROD || wand->type == HORN)
		1132	{
942	/* Found rod/horn, let's use it if possible */	1133	/* Found rod/horn, let's use it if possible */
943	at_least_one = 1;	1134	at_least_one = 1;
944	if( wand->stats.hp < MAX( wand->inv->stats.sp, wand->inv->stats.grace ) )	1135	if (wand->stats.hp < MAX (wand->inv->stats.sp, wand->inv->stats.grace))
945	continue;	1136	continue;
946		1137
947	/* drain charge before casting spell - can be a case where the	1138	/* drain charge before casting spell - can be a case where the
948	* spell destroys the monster, and rod, so if done after, results	1139	* spell destroys the monster, and rod, so if done after, results
949	* in crash.	1140	* in crash.
950	*/	1141	*/
951	drain_rod_charge( wand );	1142	drain_rod_charge (wand);
952	cast_spell( head, wand, dir, wand->inv, NULL );	1143	cast_spell (head, wand, dir, wand->inv, NULL);
953		1144
954	/* Success */	1145	/* Success */
955	return 1;	1146	return 1;
956	}	1147	}
957	}	1148	}
958		1149
959	if ( at_least_one )	1150	if (at_least_one)
960	return 0;	1151	return 0;
961		1152
962	LOG(llevError,"Error: Monster %s (%d) HAS_READY_RANG() without wand/horn/rod.\n",	1153	LOG (llevError, "Error: Monster %s (%d) HAS_READY_RANGE() without wand/horn/rod.\n", &head->name, head->count);
963	&head->name,head->count);
964	CLEAR_FLAG(head, FLAG_READY_RANGE);	1154	CLEAR_FLAG (head, FLAG_READY_RANGE);
965	return 0;	1155	return 0;
966	}	1156	}
967		1157
		1158	int
968	int monster_use_bow(object *head, object *part, object *pl, int dir) {	1159	monster_use_bow (object *head, object *part, object *pl, int dir)
		1160	{
969	object *owner;	1161	object *owner;
970		1162
971	if(!(dir=path_to_player(part,pl,0)))	1163	if (!(dir = path_to_player (part, pl, 0)))
972	return 0;	1164	return 0;
		1165
973	if(QUERY_FLAG(head,FLAG_CONFUSED))	1166	if (QUERY_FLAG (head, FLAG_CONFUSED))
974	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	1167	dir = absdir (dir + rndm (3) + rndm (3) - 2);
975		1168
976	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	1169	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
		1170	{
977	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	1171	int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
		1172
978	if(dirdiff(dir,dir2) < 1)	1173	if (dirdiff (dir, dir2) < 1)
979	return 0; /* Might hit owner with arrow */	1174	return 0; /* Might hit owner with arrow */
980	}	1175	}
981		1176
982	/* in server/player.c */	1177	/* in server/player.c */
983	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);
984		1179
985	}	1180	}
986		1181
987	/* Checks if putting on 'item' will make 'who' do more	1182	void
988	* damage. This is a very simplistic check - also checking things	1183	npc_call_help (object *op)
989	* like speed and ac are also relevant.	1184	{
990	*	1185	unordered_mapwalk (op, -7, -7, 7, 7)
991	* return true if item is a better object.
992	*/
993
994	int check_good_weapon(object *who, object *item) {
995	object *other_weap;
996	int val=0, i;
997
998	for(other_weap=who->inv;other_weap!=NULL;other_weap=other_weap->below)
999	if(other_weap->type==item->type&&QUERY_FLAG(other_weap,FLAG_APPLIED))
1000	break;
1001
1002	if(other_weap==NULL) /* No other weapons */
1003	return 1;
1004
1005	/* Rather than go through and apply the new one, and see if it is
1006	* better, just do some simple checks
1007	* Put some multipliers for things that hvae several effects,
1008	* eg, magic affects both damage and wc, so it has more weight
1009	*/
1010
1011	val = item->stats.dam - other_weap->stats.dam;
1012	val += (item->magic - other_weap->magic) * 3;
1013	/* Monsters don't really get benefits from things like regen rates
1014	* from items. But the bonus for their stats are very important.
1015	*/
1016	for (i=0; i<NUM_STATS; i++)
1017	val += (get_attr_value(&item->stats, i) - get_attr_value(&other_weap->stats, i))*2;
1018
1019	if (val > 0) return 1;
1020	else return 0;
1021
1022	}
1023
1024	int check_good_armour(object *who, object *item) {
1025	object *other_armour;
1026	int val=0,i;
1027
1028	for (other_armour = who->inv; other_armour != NULL;
1029	other_armour = other_armour->below)
1030	if (other_armour->type == item->type && QUERY_FLAG(other_armour,FLAG_APPLIED))
1031	break;
1032
1033	if (other_armour == NULL) /* No other armour, use the new */
1034	return 1;
1035
1036	/* Like above function , see which is better */
1037	val = item->stats.ac - other_armour->stats.ac;
1038	val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL])/5;
1039	val += (item->magic - other_armour->magic) * 3;
1040
1041	/* for the other protections, do weigh them very much in the equation -
1042	* it is the armor protection which is most important, because there is
1043	* no good way to know what the player may attack the monster with.
1044	* So if the new item has better protection than the old, give that higher
1045	* value. If the reverse, then decrease the value of this item some.
1046	*/
1047	for (i=1; i <NROFATTACKS; i++) {
1048	if (item->resist[i] > other_armour->resist[i]) val++;
1049	else if (item->resist[i] < other_armour->resist[i]) val--;
1050	}	1186	{
		1187	mapspace &ms = m->at (nx, ny);
1051		1188
1052	/* Very few armours have stats, so not much need to worry about those. */	1189	/* If nothing alive on this space, no need to search the space. */
		1190	if (!(ms.flags () & P_IS_ALIVE))
		1191	continue;
1053		1192
1054	if (val > 0) return 1;	1193	for (object *npc = ms.bot; npc; npc = npc->above)
1055	else return 0;	1194	if (QUERY_FLAG (npc, FLAG_ALIVE) && QUERY_FLAG (npc, FLAG_UNAGGRESSIVE))
1056		1195	npc->enemy = op->enemy;
		1196	}
1057	}	1197	}
1058		1198
1059	/*	1199	void
1060	* monster_check_pickup(): checks for items that monster can pick up.	1200	check_earthwalls (object *op, maptile *m, int x, int y)
1061	*	1201	{
1062	* Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.	1202	for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1063	* Each time the blob passes over some treasure, it will	1203	if (tmp->type == EARTHWALL)
1064	* grab it a.s.a.p.
1065	*
1066	* Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
1067	* to handle this.
1068	*
1069	* This function was seen be continueing looping at one point (tmp->below
1070	* became a recursive loop. It may be better to call monster_check_apply
1071	* after we pick everything up, since that function may call others which
1072	* affect stacking on this space.
1073	*/
1074
1075	void monster_check_pickup(object *monster) {
1076	object *tmp,*next;
1077	int next_tag;
1078
1079	for(tmp=monster->below;tmp!=NULL;tmp=next) {
1080	next=tmp->below;
1081	next_tag = next ? next->count : 0;
1082	if (monster_can_pick(monster,tmp)) {
1083	remove_ob(tmp);
1084	tmp = insert_ob_in_ob(tmp,monster);
1085	(void) monster_check_apply(monster,tmp);
1086	}	1204	{
1087	/* We could try to re-establish the cycling, of the space, but probably	1205	hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1);
1088	* not a big deal to just bail out.
1089	*/
1090	if (next && was_destroyed(next, next_tag)) return;
1091	}
1092	}
1093
1094	/*
1095	* monster_can_pick(): If the monster is interested in picking up
1096	* the item, then return 0. Otherwise 0.
1097	* Instead of pick_up, flags for "greed", etc, should be used.
1098	* I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
1099	*/
1100
1101	int monster_can_pick(object *monster, object *item) {
1102	int flag=0;
1103	int i;
1104
1105	if(!can_pick(monster,item))
1106	return 0;
1107
1108	if(QUERY_FLAG(item,FLAG_UNPAID))
1109	return 0;
1110
1111	if (monster->pick_up&64) /* All */
1112	flag=1;
1113
1114	else switch(item->type) {
1115	case MONEY:
1116	case GEM:
1117	flag=monster->pick_up&2;
1118	break;
1119
1120	case FOOD:
1121	flag=monster->pick_up&4;
1122	break;
1123
1124	case WEAPON:
1125	flag=(monster->pick_up&8)||QUERY_FLAG(monster,FLAG_USE_WEAPON);
1126	break;
1127
1128	case ARMOUR:
1129	case SHIELD:
1130	case HELMET:
1131	case BOOTS:
1132	case GLOVES:
1133	case GIRDLE:
1134	flag=(monster->pick_up&16)||QUERY_FLAG(monster,FLAG_USE_ARMOUR);
1135	break;
1136
1137	case SKILL:
1138	flag=QUERY_FLAG(monster,FLAG_CAN_USE_SKILL);
1139	break;
1140
1141	case RING:
1142	flag=QUERY_FLAG(monster,FLAG_USE_RING);
1143	break;
1144
1145	case WAND:
1146	case HORN:
1147	case ROD:
1148	flag=QUERY_FLAG(monster,FLAG_USE_RANGE);
1149	break;
1150
1151	case SPELLBOOK:
1152	flag=(monster->arch!=NULL&&QUERY_FLAG((&monster->arch->clone),FLAG_CAST_SPELL));
1153	break;
1154
1155	case SCROLL:
1156	flag = QUERY_FLAG(monster,FLAG_USE_SCROLL);
1157	break;
1158
1159	case BOW:
1160	case ARROW:
1161	flag=QUERY_FLAG(monster,FLAG_USE_BOW);
1162	break;
1163	}
1164	/* Simplistic check - if the monster has a location to equip it, he will
1165	* pick it up. Note that this doesn't handle cases where an item may
1166	* use several locations.
1167	*/
1168	for (i=0; i < NUM_BODY_LOCATIONS; i++) {
1169	if (monster->body_info[i] && item->body_info[i]) {
1170	flag=1;
1171	break;
1172	}
1173	}
1174
1175	if (((!(monster->pick_up&32))&&flag) || ((monster->pick_up&32)&&(!flag)))
1176	return 1;
1177	return 0;
1178	}
1179
1180	/*
1181	* monster_apply_below():
1182	* Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
1183	* eager to apply things, encounters something apply-able,
1184	* then make him apply it
1185	*/
1186
1187	void monster_apply_below(object *monster) {
1188	object *tmp, *next;
1189
1190	for(tmp=monster->below;tmp!=NULL;tmp=next) {
1191	next=tmp->below;
1192	switch (tmp->type) {
1193	case CF_HANDLE:
1194	case TRIGGER:
1195	if (monster->will_apply&1)
1196	manual_apply(monster,tmp,0);
1197	break;
1198
1199	case TREASURE:
1200	if (monster->will_apply&2)
1201	manual_apply(monster,tmp,0);
1202	break;
1203
1204	}
1205	if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
1206	break;
1207	}
1208	}
1209
1210	/*
1211	* monster_check_apply() is meant to be called after an item is
1212	* inserted in a monster.
1213	* If an item becomes outdated (monster found a better item),
1214	* a pointer to that object is returned, so it can be dropped.
1215	* (so that other monsters can pick it up and use it)
1216	* Note that as things are now, monsters never drop something -
1217	* they can pick up all that they can use.
1218	*/
1219
1220	/* Sept 96, fixed this so skills will be readied -b.t.*/
1221
1222	void monster_check_apply(object *mon, object *item) {
1223
1224	int flag = 0;
1225
1226	if(item->type==SPELLBOOK&&
1227	mon->arch!=NULL&&(QUERY_FLAG((&mon->arch->clone),FLAG_CAST_SPELL))) {
1228	SET_FLAG(mon, FLAG_CAST_SPELL);
1229	return;	1206	return;
1230	}	1207	}
		1208	}
1231		1209
1232	/* If for some reason, this item is already applied, no more work to do */	1210	void
1233	if(QUERY_FLAG(item,FLAG_APPLIED)) return;	1211	check_doors (object *op, maptile *m, int x, int y)
1234		1212	{
1235	/* Might be better not to do this - if the monster can fire a bow,	1213	for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1236	* it is possible in his wanderings, he will find one to use. In	1214	if (tmp->type == DOOR)
1237	* which case, it would be nice to have ammo for it.	1215	{
1238	*/	1216	hit_player (tmp, 1000, op, AT_PHYSICAL, 1);
1239	if(QUERY_FLAG(mon,FLAG_USE_BOW) && item->type==ARROW) {
1240	/* Check for the right kind of bow */
1241	object *bow;
1242	for(bow=mon->inv;bow!=NULL;bow=bow->below)
1243	if(bow->type==BOW && bow->race==item->race) {
1244	SET_FLAG(mon, FLAG_READY_BOW);
1245	LOG(llevMonster,"Found correct bow for arrows.\n");
1246	return; /* nothing more to do for arrows */
1247	}
1248	}
1249
1250	if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE) flag=1;
1251	/* Eating food gets hp back */
1252	else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD) flag=1;
1253	else if (item->type == SCROLL && QUERY_FLAG(mon, FLAG_USE_SCROLL)) {
1254	if (!item->inv)
1255	LOG(llevDebug,"Monster %d having scroll %d with empty inventory!", mon->count, item->count);
1256	else if (monster_should_cast_spell(mon, item->inv))
1257	SET_FLAG(mon, FLAG_READY_SCROLL);
1258	/* Don't use it right now */
1259	return;	1217	return;
1260	}
1261	else if (item->type == WEAPON) flag = check_good_weapon(mon,item);
1262	else if (IS_ARMOR(item)) flag = check_good_armour(mon,item);
1263	/* Should do something more, like make sure this is a better item */
1264	else if (item->type == RING)
1265	flag=1;
1266	else if ( item->type==WAND || item->type == ROD || item->type==HORN )
1267	{
1268	/* We never really 'ready' the wand/rod/horn, because that would mean the
1269	* weapon would get undone.
1270	*/
1271	if (!(can_apply_object(mon, item) & CAN_APPLY_NOT_MASK))
1272	{
1273	SET_FLAG(mon, FLAG_READY_RANGE);
1274	SET_FLAG(item, FLAG_APPLIED);
1275	}
1276	return;
1277	}
1278	else if (item->type == BOW) {
1279	/* We never really 'ready' the bow, because that would mean the
1280	* weapon would get undone.
1281	*/
1282	if (!(can_apply_object(mon, item) & CAN_APPLY_NOT_MASK))
1283	SET_FLAG(mon, FLAG_READY_BOW);
1284	return;
1285	}
1286	else if ( item->type == SKILL )
1287	{
1288	/*
1289	* skills are specials: monsters must have the 'FLAG_READY_SKILL' flag set,
1290	* else they can't use the skill...
1291	* Skills also don't need to get applied, so return now.
1292	*/
1293	SET_FLAG(mon, FLAG_READY_SKILL);
1294	return;
1295	}
1296
1297
1298	/* if we don't match one of the above types, return now.
1299	* can_apply_object will say that we can apply things like flesh,
1300	* bolts, and whatever else, because it only checks against the
1301	* body_info locations.
1302	*/
1303	if (!flag) return;
1304
1305	/* Check to see if the monster can use this item. If not, no need
1306	* to do further processing. Note that can_apply_object already checks
1307	* for the CAN_USE flags.
1308	*/
1309	if (can_apply_object(mon, item) & CAN_APPLY_NOT_MASK) return;
1310
1311	/* should only be applying this item, not unapplying it.
1312	* also, ignore status of curse so they can take off old armour.
1313	* monsters have some advantages after all.
1314	*/
1315	manual_apply(mon, item, AP_APPLY | AP_IGNORE_CURSE);
1316
1317	return;
1318	}
1319
1320	void npc_call_help(object *op) {
1321	int x,y, mflags;
1322	object *npc;
1323	sint16 sx, sy;
1324	mapstruct *m;
1325
1326	for(x = -3; x < 4; x++)
1327	for(y = -3; y < 4; y++) {
1328	m = op->map;
1329	sx = op->x + x;
1330	sy = op->y + y;
1331	mflags = get_map_flags(m, &m, sx, sy, &sx, &sy);
1332	/* If nothing alive on this space, no need to search the space. */
1333	if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))
1334	continue;
1335
1336	for(npc = get_map_ob(m,sx,sy);npc!=NULL;npc=npc->above)
1337	if(QUERY_FLAG(npc, FLAG_ALIVE)&&QUERY_FLAG(npc, FLAG_UNAGGRESSIVE))
1338	npc->enemy = op->enemy;
1339	}
1340	}
1341
1342
1343	int dist_att (int dir , object *ob, object *enemy, object *part, rv_vector *rv) {
1344
1345	if (can_hit(part,enemy,rv))
1346	return dir;
1347	if (rv->distance < 10)
1348	return absdir(dir+4);
1349	else if (rv->distance>18)
1350	return dir;
1351	return 0;
1352	}
1353
1354	int run_att (int dir, object *ob, object *enemy,object *part, rv_vector *rv) {
1355
1356	if ((can_hit (part,enemy,rv) && ob->move_status <20) || ob->move_status <20) {
1357	ob->move_status++;
1358	return (dir);
1359	}
1360	else if (ob->move_status >20)
1361	ob->move_status = 0;
1362	return absdir (dir+4);
1363	}
1364
1365	int hitrun_att (int dir, object *ob,object *enemy) {
1366	if (ob->move_status ++ < 25)
1367	return dir;
1368	else if (ob->move_status <50)
1369	return absdir (dir+4);
1370	else
1371	ob->move_status = 0;
1372	return absdir(dir+4);
1373	}
1374
1375	int wait_att (int dir, object *ob,object *enemy,object *part,rv_vector *rv) {
1376
1377	int inrange = can_hit (part, enemy,rv);
1378		1218	}
1379	if (ob->move_status || inrange)
1380	ob->move_status++;
1381
1382	if (ob->move_status == 0)
1383	return 0;
1384	else if (ob->move_status <10)
1385	return dir;
1386	else if (ob->move_status <15)
1387	return absdir(dir+4);
1388	ob->move_status = 0;
1389	return 0;
1390	}
1391
1392	int disthit_att (int dir, object *ob, object *enemy, object *part,rv_vector *rv) {
1393
1394	/* The logic below here looked plain wrong before. Basically, what should
1395	* happen is that if the creatures hp percentage falls below run_away,
1396	* the creature should run away (dir+4)
1397	* I think its wrong for a creature to have a zero maxhp value, but
1398	* at least one map has this set, and whatever the map contains, the
1399	* server should try to be resilant enough to avoid the problem
1400	*/
1401	if (ob->stats.maxhp && (ob->stats.hp*100)/ob->stats.maxhp < ob->run_away)
1402	return absdir(dir+4);
1403	return dist_att (dir,ob,enemy,part,rv);
1404	}
1405
1406	int wait_att2 (int dir, object *ob,object *enemy,object *part, rv_vector *rv) {
1407	if (rv->distance < 9)
1408	return absdir (dir+4);
1409	return 0;
1410	}
1411
1412	void circ1_move (object *ob) {
1413	static int circle [12] = {3,3,4,5,5,6,7,7,8,1,1,2};
1414	if(++ob->move_status > 11)
1415	ob->move_status = 0;
1416	if (!(move_object(ob,circle[ob->move_status])))
1417	(void) move_object(ob,RANDOM()%8+1);
1418	}
1419
1420	void circ2_move (object *ob) {
1421	static int circle[20] = {3,3,3,4,4,5,5,5,6,6,7,7,7,8,8,1,1,1,2,2};
1422	if(++ob->move_status > 19)
1423	ob->move_status = 0;
1424	if(!(move_object(ob,circle[ob->move_status])))
1425	(void) move_object(ob,RANDOM()%8+1);
1426	}
1427
1428	void pace_movev(object *ob) {
1429	if (ob->move_status++ > 6)
1430	ob->move_status = 0;
1431	if (ob->move_status < 4)
1432	(void) move_object (ob,5);
1433	else
1434	(void) move_object(ob,1);
1435	}
1436
1437	void pace_moveh (object *ob) {
1438	if (ob->move_status++ > 6)
1439	ob->move_status = 0;
1440	if (ob->move_status < 4)
1441	(void) move_object(ob,3);
1442	else
1443	(void) move_object(ob,7);
1444	}
1445
1446	void pace2_movev (object *ob) {
1447	if (ob->move_status ++ > 16)
1448	ob->move_status = 0;
1449	if (ob->move_status <6)
1450	(void) move_object (ob,5);
1451	else if (ob->move_status < 8)
1452	return;
1453	else if (ob->move_status <13)
1454	(void) move_object (ob,1);
1455	else return;
1456	}
1457
1458	void pace2_moveh (object *ob) {
1459	if (ob->move_status ++ > 16)
1460	ob->move_status = 0;
1461	if (ob->move_status <6)
1462	(void) move_object (ob,3);
1463	else if (ob->move_status < 8)
1464	return;
1465	else if (ob->move_status <13)
1466	(void) move_object (ob,7);
1467	else return;
1468	}
1469
1470	void rand_move (object *ob) {
1471	int i;
1472	if (ob->move_status <1 || ob->move_status >8 ||
1473	!(move_object(ob,ob->move_status|| ! (RANDOM()% 9))))
1474	for (i = 0; i < 5; i++)
1475	if (move_object(ob,ob->move_status = RANDOM()%8+1))
1476	return;
1477	}
1478
1479	void check_earthwalls(object *op, mapstruct *m, int x, int y) {
1480	object *tmp;
1481	for (tmp = get_map_ob(m, x, y); tmp!=NULL; tmp=tmp->above) {
1482	if (tmp->type == EARTHWALL) {
1483	hit_player(tmp,op->stats.dam,op,AT_PHYSICAL,1);
1484	return;
1485	}
1486	}
1487	}
1488
1489	void check_doors(object *op, mapstruct *m, int x, int y) {
1490	object *tmp;
1491	for (tmp = get_map_ob(m, x, y); tmp!=NULL; tmp=tmp->above) {
1492	if (tmp->type == DOOR) {
1493	hit_player(tmp,1000,op,AT_PHYSICAL,1);
1494	return;
1495	}
1496	}
1497	}	1219	}
1498		1220
1499	/* find_mon_throw_ob() - modeled on find_throw_ob	1221	/* find_mon_throw_ob() - modeled on find_throw_ob
1500	* This is probably overly simplistic as it is now - We want	1222	* This is probably overly simplistic as it is now - We want
1501	* monsters to throw things like chairs and other pieces of	1223	* monsters to throw things like chairs and other pieces of
1502	* furniture, even if they are not good throwable objects.	1224	* furniture, even if they are not good throwable objects.
1503	* Probably better to have the monster throw a throwable object	1225	* Probably better to have the monster throw a throwable object
1504	* first, then throw any non equipped weapon.	1226	* first, then throw any non equipped weapon.
1505	*/	1227	*/
1506		1228	object *
1507	object *find_mon_throw_ob( object *op ) {	1229	find_mon_throw_ob (object *op)
		1230	{
1508	object *tmp = NULL;	1231	object *tmp = NULL;
1509
1510	if(op->head) tmp=op->head; else tmp=op;
1511		1232
		1233	if (op->head)
		1234	tmp = op->head;
		1235	else
		1236	tmp = op;
		1237
1512	/* New throw code: look through the inventory. Grap the first legal is_thrown	1238	/* New throw code: look through the inventory. Grap the first legal is_thrown
1513	* marked item and throw it to the enemy.	1239	* marked item and throw it to the enemy.
1514	*/	1240	*/
1515
1516	for(tmp=op->inv;tmp;tmp=tmp->below) {	1241	for (tmp = op->inv; tmp; tmp = tmp->below)
1517		1242	{
1518	/* Can't throw invisible objects or items that are applied */	1243	/* Can't throw invisible objects or items that are applied */
1519	if(tmp->invisible || QUERY_FLAG(tmp,FLAG_APPLIED)) continue;	1244	if (tmp->invisible || QUERY_FLAG (tmp, FLAG_APPLIED))
		1245	continue;
1520		1246
1521	if(QUERY_FLAG(tmp,FLAG_IS_THROWN))	1247	if (QUERY_FLAG (tmp, FLAG_IS_THROWN))
1522	break;	1248	break;
1523		1249
1524	}	1250	}
1525		1251
1526	#ifdef DEBUG_THROW	1252	#ifdef DEBUG_THROW
1527	LOG(llevDebug,"%s chooses to throw: %s (%d)\n",op->name,	1253	LOG (llevDebug, "%s chooses to throw: %s (%d)\n", op->name, !(tmp) ? "(nothing)" : query_name (tmp), tmp ? tmp->count : -1);
1528	!(tmp)?"(nothing)":query_name(tmp),tmp?tmp->count:-1);
1529	#endif	1254	#endif
1530		1255
1531	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;
1532	}	1671	}
1533		1672
1534	/* 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
1535	* 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
1536	* 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.
…		…
1538	* properly. I also so odd code in place that checked for x distance	1677	* properly. I also so odd code in place that checked for x distance
1539	* OR y distance being within some range - that seemed wrong - both should	1678	* OR y distance being within some range - that seemed wrong - both should
1540	* be within the valid range. MSW 2001-08-05	1679	* be within the valid range. MSW 2001-08-05
1541	* 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
1542	*/	1681	*/
1543		1682	int
1544	int can_detect_enemy (object *op, object *enemy, rv_vector *rv) {	1683	can_detect_enemy (object *op, object *enemy, rv_vector * rv)
1545	int radius = MIN_MON_RADIUS, hide_discovery;	1684	{
1546
1547	/* null detection for any of these condtions always */	1685	/* null detection for any of these condtions always */
1548	if(!op || !enemy || !op->map || !enemy->map)	1686	if (!op || !enemy || !op->map || !enemy->map)
1549	return 0;	1687	return 0;
1550		1688
1551	/* 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 */
1552	if (!on_same_map(op, enemy))	1690	if (!on_same_map (op, enemy))
1553	return 0;	1691	return 0;
1554		1692
1555	get_rangevector(op, enemy, rv, 0);	1693	get_rangevector (op, enemy, rv, 0);
1556		1694
1557	/* Monsters always ignore the DM */	1695	/* Monsters always ignore the DM */
1558	if ( ( op->type != PLAYER ) && QUERY_FLAG( enemy, FLAG_WIZ ) )	1696	if (!op->is_player () && QUERY_FLAG (enemy, FLAG_WIZ))
1559	return 0;	1697	return 0;
1560		1698
1561	/* simple check. Should probably put some range checks in here. */	1699	/* simple check. Should probably put some range checks in here. */
1562	if(can_see_enemy(op,enemy)) return 1;	1700	if (can_see_enemy (op, enemy))
		1701	return 1;
1563		1702
1564	/* 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
1565	* finding enemies!	1704	* finding enemies!
1566	*/	1705	*/
1567	if(op->type==PLAYER) return 0;	1706	if (op->is_player ())
		1707	return 0;
1568		1708
1569	/* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE	1709	/* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE
1570	* 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
1571	*/	1711	*/
1572	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)))
1573	return 0;	1713	return 0;
1574		1714
		1715	int radius = MIN_MON_RADIUS;
		1716
1575	/* use this for invis also */	1717	/* use this for invis also */
1576	hide_discovery = op->stats.Int/5;	1718	int hide_discovery = op->stats.Int / 5;
1577		1719
1578	/* Determine Detection radii */	1720	/* Determine Detection radii */
1579	if(!enemy->hide) /* to detect non-hidden (eg dark/invis enemy) */	1721	if (!enemy->flag [FLAG_HIDDEN]) /* to detect non-hidden (eg dark/invis enemy) */
1580	radius = (op->stats.Wis/5)+1>MIN_MON_RADIUS?(op->stats.Wis/5)+1:MIN_MON_RADIUS;	1722	radius = max (MIN_MON_RADIUS, op->stats.Wis / 3 + 1);
		1723	else
1581	else { /* a level/INT/Dex adjustment for hiding */	1724	{ /* a level/INT/Dex adjustment for hiding */
1582	object *sk_hide;
1583	int bonus = (op->level/2) + (op->stats.Int/5);	1725	int bonus = op->level / 2 + op->stats.Int / 5;
1584		1726
1585	if(enemy->type==PLAYER) {	1727	if (enemy->is_player ())
		1728	{
1586	if((sk_hide = find_skill_by_number(enemy,SK_HIDING)))	1729	if (object *sk_hide = find_skill_by_number (enemy, SK_HIDING))
1587	bonus -= sk_hide->level;	1730	bonus -= sk_hide->level;
1588	else {	1731	else
		1732	{
1589	LOG(llevError,"can_detect_enemy() got hidden player w/o hiding skill!\n");	1733	LOG (llevError, "can_detect_enemy() got hidden player w/o hiding skill!\n");
1590	make_visible(enemy);	1734	make_visible (enemy);
1591	radius=radius<MIN_MON_RADIUS?MIN_MON_RADIUS:radius;	1735	radius = radius < MIN_MON_RADIUS ? MIN_MON_RADIUS : radius;
1592	}	1736	}
1593	}	1737	}
1594	else /* enemy is not a player */	1738	else /* enemy is not a player */
1595	bonus -= enemy->level;	1739	bonus -= enemy->level;
1596		1740
1597	radius += bonus/5;	1741	radius += bonus / 5;
1598	hide_discovery += bonus*5;	1742	hide_discovery += bonus * 5;
1599	} /* else creature has modifiers for hiding */	1743	} /* else creature has modifiers for hiding */
1600		1744
1601	/* Radii stealth adjustment. Only if you are stealthy	1745	/* Radii stealth adjustment. Only if you are stealthy
1602	* will you be able to sneak up closer to creatures */	1746	* will you be able to sneak up closer to creatures */
1603	if(QUERY_FLAG(enemy,FLAG_STEALTH))	1747	if (QUERY_FLAG (enemy, FLAG_STEALTH))
1604	radius = radius/2, hide_discovery = hide_discovery/3;	1748	{
		1749	radius /= 2;
		1750	hide_discovery /= 3;
		1751	}
1605		1752
1606	/* Radii adjustment for enemy standing in the dark */	1753	/* Radii adjustment for enemy standing in the dark */
1607	if(op->map->darkness>0 && !stand_in_light(enemy)) {	1754	if (!stand_in_light (enemy))
		1755	{
1608	/* on dark maps body heat can help indicate location with infravision	1756	/* on dark maps body heat can help indicate location with infravision
1609	* undead don't have body heat, so no benefit detecting them.	1757	* undead don't have body heat, so no benefit detecting them.
1610	*/	1758	*/
1611	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))
1612	radius += op->map->darkness/2;	1760	radius += op->map->darklevel () / 2;
1613	else	1761	else
1614	radius -= op->map->darkness/2;	1762	radius -= op->map->darklevel () / 2;
1615		1763
1616	/* op next to a monster (and not in complete darkness)	1764	/* op next to a monster (and not in complete darkness)
1617	* the monster should have a chance to see you.	1765	* the monster should have a chance to see you.
1618	*/	1766	*/
1619	if(radius<MIN_MON_RADIUS && op->map->darkness<5 && rv->distance<=1)	1767	if (radius < MIN_MON_RADIUS && op->map->darklevel () < MAX_DARKNESS && rv->distance <= 1)
1620	radius = MIN_MON_RADIUS;	1768	radius = MIN_MON_RADIUS;
1621	} /* if on dark map */	1769	} /* if on dark map */
1622		1770
1623	/* Lets not worry about monsters that have incredible detection	1771	/* Lets not worry about monsters that have incredible detection
1624	* 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
1625	* (potentially) see. This is 13, as that is the maximum size the player	1773	* (potentially) see. This is 13, as that is the maximum size the player
1626	* may have for their map - in that way, creatures at the edge will	1774	* may have for their map - in that way, creatures at the edge will
1627	* do something. Note that the distance field in the	1775	* do something. Note that the distance field in the
1628	* vector is real distance, so in theory this should be 18 to	1776	* vector is real distance, so in theory this should be 18 to
1629	* find that.	1777	* find that.
1630	*/	1778	*/
1631	if(radius>13) radius = 13;	1779	// note that the above reasoning was utter bullshit even at the time it was written
		1780	// we use 25, lets see if we have the cpu time for it
		1781	radius = min (25, radius);
1632		1782
1633	/* Enemy in range! Now test for detection */	1783	/* Enemy in range! Now test for detection */
1634	if ((int) rv->distance <= radius) {	1784	if (rv->distance <= radius)
		1785	{
1635	/* ah, we are within range, detected? take cases */	1786	/* ah, we are within range, detected? take cases */
1636	if(!enemy->invisible) /* enemy in dark squares... are seen! */	1787	if (!enemy->invisible) /* enemy in dark squares... are seen! */
1637	return 1;	1788	return 1;
1638		1789
1639	/* hidden or low-quality invisible */	1790	/* hidden or low-quality invisible */
1640	if(enemy->hide && (rv->distance <= 1) && (RANDOM()%100<=hide_discovery)) {	1791	if (enemy->flag [FLAG_HIDDEN] && rv->distance <= 1 && rndm (100) <= hide_discovery)
		1792	{
1641	make_visible(enemy);	1793	make_visible (enemy);
		1794
1642	/* inform players of new status */	1795	/* inform players of new status */
1643	if(enemy->type==PLAYER && player_can_view(enemy,op))	1796	if (enemy->type == PLAYER && player_can_view (enemy, op))
1644	new_draw_info_format(NDI_UNIQUE,0, enemy,	1797	new_draw_info_format (NDI_UNIQUE, 0, enemy, "You are discovered by %s!", &op->name);
1645	"You are discovered by %s!",&op->name);	1798
1646	return 1; /* detected enemy */	1799	return 1; /* detected enemy */
1647	}	1800	}
1648	else if (enemy->invisible) {	1801	else if (enemy->invisible)
		1802	{
1649	/* Change this around - instead of negating the invisible, just	1803	/* Change this around - instead of negating the invisible, just
1650	* return true so that the mosnter that managed to detect you can	1804	* return true so that the monster that managed to detect you can
1651	* do something to you. Decreasing the duration of invisible	1805	* do something to you. Decreasing the duration of invisible
1652	* doesn't make a lot of sense IMO, as a bunch of stupid creatures	1806	* doesn't make a lot of sense IMO, as a bunch of stupid creatures
1653	* can then basically negate the spell. The spell isn't negated -	1807	* can then basically negate the spell. The spell isn't negated -
1654	* they just know where you are!	1808	* they just know where you are!
1655	*/	1809	*/
1656	if ((RANDOM() % 50) <= hide_discovery) {	1810	if (rndm (50) <= hide_discovery)
		1811	{
1657	if (enemy->type == PLAYER) {	1812	if (enemy->type == PLAYER)
1658	new_draw_info_format(NDI_UNIQUE,0, enemy,	1813	new_draw_info_format (NDI_UNIQUE, 0, enemy, "You see %s noticing your position.", query_name (op));
1659	"You see %s noticing your position.", query_name(op));	1814
1660	}
1661	return 1;	1815	return 1;
1662	}	1816	}
1663	}	1817	}
1664	} /* within range */	1818	} /* within range */
1665		1819
1666	/* Wasn't detected above, so still hidden */	1820	/* Wasn't detected above, so still hidden */
1667	return 0;	1821	return 0;
1668	}	1822	}
1669		1823
1670	/* 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
1671	* intellegent algorithm. For one thing, we ignore los here, SO it	1825	* intelligent algorithm. For one thing, we ignore los here, SO it
1672	* 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
1673	* other side of a wall (!).	1827	* other side of a wall (!).
1674	*/	1828	*/
1675		1829	int
1676	int stand_in_light( object *op) {	1830	stand_in_light (object *op)
1677	sint16 nx,ny;	1831	{
1678	mapstruct *m;	1832	if (op)
		1833	{
		1834	if (!op->is_on_map ())
		1835	return 0;
1679		1836
		1837	if (op->map->darklevel () <= 0)
		1838	return 1;
1680		1839
1681	if(!op) return 0;
1682	if(op->glow_radius > 0) return 1;	1840	if (op->glow_radius > 0)
		1841	return 1;
1683		1842
1684	if(op->map) {	1843	if (op->map)
1685	int x, y, x1, y1;	1844	unordered_mapwalk (op, -MAX_LIGHT_RADIUS, -MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS)
1686		1845	{
1687
1688
1689	/* Check the spaces with the max light radius to see if any of them	1846	/* Check the spaces with the max light radius to see if any of them
1690	* have lights, and if any of them light the player enough, then return 1.	1847	* have lights, and if any of them light the player enough, then return 1.
1691	*/	1848	*/
1692	for (x = op->x - MAX_LIGHT_RADII; x <= op->x + MAX_LIGHT_RADII; x++) {	1849	int light = m->at (nx, ny).light;
1693	for (y = op->y - MAX_LIGHT_RADII; y <= op->y + MAX_LIGHT_RADII; y++) {
1694	m = op->map;
1695	nx = x;
1696	ny = y;
1697		1850
1698	if (get_map_flags(m, &m, nx, ny, &nx, &ny) & P_OUT_OF_MAP) continue;	1851	if (expect_false (light > 0) && idistance (dx, dy) <= light)
1699		1852	return 1;
1700	x1 = abs(x - op->x)*abs(x - op->x);
1701	y1 = abs(y - op->y)*abs(y - op->y);
1702	if (isqrt(x1 + y1) < GET_MAP_LIGHT(m, nx, ny)) return 1;
1703	}	1853	}
1704	}
1705	}	1854	}
		1855
1706	return 0;	1856	return 0;
1707	}	1857	}
1708
1709		1858
1710	/* assuming no walls/barriers, lets check to see if its *possible*	1859	/* assuming no walls/barriers, lets check to see if its *possible*
1711	* to see an enemy. Note, "detection" is different from "seeing".	1860	* to see an enemy. Note, "detection" is different from "seeing".
1712	* See can_detect_enemy() for more details. -b.t.	1861	* See can_detect_enemy() for more details. -b.t.
1713	* return 0 if can't be seen, 1 if can be	1862	* return 0 if can't be seen, 1 if can be
1714	*/	1863	*/
1715		1864	int
1716	int can_see_enemy (object *op, object *enemy) {	1865	can_see_enemy (object *op, object *enemy)
		1866	{
1717	object *looker = op->head?op->head:op;	1867	object *looker = op->head ? op->head : op;
1718		1868
1719	/* safety */	1869	/* safety */
1720	if(!looker||!enemy||!QUERY_FLAG(looker,FLAG_ALIVE))	1870	if (!looker || !enemy || !QUERY_FLAG (looker, FLAG_ALIVE))
1721	return 0;	1871	return 0;
1722		1872
1723	/* we dont give a full treatment of xrays here (shorter range than normal,	1873	/* we dont give a full treatment of xrays here (shorter range than normal,
1724	* see through walls). Should we change the code elsewhere to make you	1874	* see through walls). Should we change the code elsewhere to make you
1725	* blind even if you can xray?	1875	* blind even if you can xray?
1726	*/	1876	*/
1727	if(QUERY_FLAG(looker,FLAG_BLIND) && !QUERY_FLAG(looker,FLAG_XRAYS))	1877	if (QUERY_FLAG (looker, FLAG_BLIND) && !QUERY_FLAG (looker, FLAG_XRAYS))
1728	return 0;	1878	return 0;
1729		1879
1730	/* checking for invisible things */	1880	/* checking for invisible things */
1731	if(enemy->invisible) {	1881	if (enemy->invisible)
		1882	{
1732	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!	1883	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!
1733	* However,if you carry any source of light, then the hidden	1884	* However,if you carry any source of light, then the hidden
1734	* creature is seeable (and stupid) */	1885	* creature is seeable (and stupid) */
1735		1886
1736	if(has_carried_lights(enemy)) {	1887	if (enemy->has_carried_lights ())
1737	if(enemy->hide) {	1888	{
		1889	if (enemy->flag [FLAG_HIDDEN])
		1890	{
1738	make_visible(enemy);	1891	make_visible (enemy);
1739	new_draw_info(NDI_UNIQUE,0, enemy,	1892	new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!");
1740	"Your light reveals your hiding spot!");
1741	}	1893	}
		1894
1742	return 1;	1895	return 1;
1743	} else if (enemy->hide) return 0;	1896	}
		1897	else if (enemy->flag [FLAG_HIDDEN])
		1898	return 0;
1744		1899
1745	/* Invisible enemy. Break apart the check for invis undead/invis looker	1900	/* Invisible enemy. Break apart the check for invis undead/invis looker
1746	* into more simple checks - the QUERY_FLAG doesn't return 1/0 values,	1901	* into more simple checks - the QUERY_FLAG doesn't return 1/0 values,
1747	* and making it a conditional makes the code pretty ugly.	1902	* and making it a conditional makes the code pretty ugly.
1748	*/	1903	*/
1749	if (!QUERY_FLAG(looker,FLAG_SEE_INVISIBLE)) {	1904	if (!QUERY_FLAG (looker, FLAG_SEE_INVISIBLE))
1750	if (makes_invisible_to(enemy, looker)) return 0;	1905	if (makes_invisible_to (enemy, looker))
1751	}	1906	return 0;
		1907	}
1752	} else if(looker->type==PLAYER) /* for players, a (possible) shortcut */	1908	else if (looker->is_player ()) /* for players, a (possible) shortcut */
1753	if(player_can_view(looker,enemy)) return 1;	1909	if (player_can_view (looker, enemy))
		1910	return 1;
1754		1911
1755	/* ENEMY IN DARK MAP. Without infravision, the enemy is not seen	1912	/* ENEMY IN DARK MAP. Without infravision, the enemy is not seen
1756	* unless they carry a light or stand in light. Darkness doesnt	1913	* unless they carry a light or stand in light. Darkness doesnt
1757	* inhibit the undead per se (but we should give their archs	1914	* inhibit the undead per se (but we should give their archs
1758	* CAN_SEE_IN_DARK, this is just a safety	1915	* CAN_SEE_IN_DARK, this is just a safety
1759	* we care about the enemy maps status, not the looker.	1916	* we care about the enemy maps status, not the looker.
1760	* only relevant for tiled maps, but it is possible that the	1917	* only relevant for tiled maps, but it is possible that the
1761	* 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
1762	* case, the looker can still see the enemy	1919	* case, the looker can still see the enemy
1763	*/	1920	*/
1764	if(enemy->map->darkness>0&&!stand_in_light(enemy)	1921	if (!stand_in_light (enemy)
1765	&&(!QUERY_FLAG(looker,FLAG_SEE_IN_DARK)||	1922	&& (!QUERY_FLAG (looker, FLAG_SEE_IN_DARK) || !is_true_undead (looker) || !QUERY_FLAG (looker, FLAG_XRAYS)))
1766	!is_true_undead(looker)||!QUERY_FLAG(looker,FLAG_XRAYS)))
1767	return 0;	1923	return 0;
1768		1924
1769	return 1;	1925	return 1;
1770	}	1926	}
1771		1927
		1928	//-GPL

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