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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 1.48 by pippijn, Tue Dec 23 18:52:58 2008 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
		9	* it under the terms of the GNU General Public License as published by
		10	* the Free Software Foundation, either version 3 of the License, or
		11	* (at your 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 GNU General Public License
		19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
		20	*
		21	* The authors can be reached via e-mail to <support@deliantra.net>
4	*/	22	*/
5		23
6	/*
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
29	#include <global.h>	24	#include <global.h>
30	#ifndef __CEXTRACT__
31	#include <sproto.h>	25	#include <sproto.h>
32	#include <spells.h>	26	#include <spells.h>
33	#include <skills.h>	27	#include <skills.h>
34	#endif
35		28
36
37	#define MIN_MON_RADIUS 3 /* minimum monster detection radius */	29	#define MIN_MON_RADIUS 3 /* minimum monster detection radius */
38
39		30
40	/* checks npc->enemy and returns that enemy if still valid,	31	/* checks npc->enemy and returns that enemy if still valid,
41	* NULL otherwise.	32	* NULL otherwise.
42	* this is map tile aware.	33	* this is map tile aware.
43	* If this returns an enemy, the range vector rv should also be	34	* If this returns an enemy, the range vector rv should also be
44	* set to sane values.	35	* set to sane values.
45	*/	36	*/
		37	object *
46	object *check_enemy(object *npc, rv_vector *rv) {	38	check_enemy (object *npc, rv_vector * rv)
47		39	{
		40
48	/* if this is pet, let him attack the same enemy as his owner	41	/* 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,	42	* TODO: when there is no ower enemy, try to find a target,
50	* which CAN attack the owner. */	43	* which CAN attack the owner. */
51	if ((npc->attack_movement & HI4) == PETMOVE)	44	if ((npc->attack_movement & HI4) == PETMOVE)
52	{	45	{
53	if (npc->owner == NULL)	46	if (npc->owner == NULL)
54	npc->enemy = NULL;	47	npc->enemy = NULL;
55	else if (npc->enemy == NULL)	48	else if (npc->enemy == NULL)
56	npc->enemy = npc->owner->enemy;	49	npc->enemy = npc->owner->enemy;
57	}	50	}
58		51
59	/* periodically, a monster mayu change its target. Also, if the object	52	/* periodically, a monster mayu change its target. Also, if the object
60	* has been destroyed, etc, clear the enemy.	53	* has been destroyed, etc, clear the enemy.
61	* TODO: this should be changed, because it invokes to attack forced or	54	* TODO: this should be changed, because it invokes to attack forced or
62	* attacked monsters to leave the attacker alone, before it is destroyed	55	* attacked monsters to leave the attacker alone, before it is destroyed
63	*/	56	*/
64	/* i had removed the random target leave, this invokes problems with friendly	57	/* 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	58	* objects, getting attacked and defending herself - they don't try to attack
66	* again then but perhaps get attack on and on	59	* 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	60	* If we include a aggravated flag in , we can handle evil vs evil and good vs good
68	* too. */	61	* too. */
69		62
70	if(npc->enemy)	63	if (npc->enemy)
71	{	64	{
72	/* I broke these if's apart to better be able to see what	65	/* I broke these if's apart to better be able to see what
73	* the grouping checks are. Code is the same.	66	* the grouping checks are. Code is the same.
74	*/	67	*/
75	if ( QUERY_FLAG(npc->enemy,FLAG_REMOVED) ||	68	if (QUERY_FLAG (npc->enemy, FLAG_REMOVED) ||
76	QUERY_FLAG(npc->enemy,FLAG_FREED) ||	69	QUERY_FLAG (npc->enemy, FLAG_FREED) ||
77	!on_same_map(npc, npc->enemy) ||	70	!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;	71	npc->enemy = NULL;
82		72
83	else if (QUERY_FLAG(npc, FLAG_FRIENDLY) && (	73	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))) ||	74	&& !(should_arena_attack (npc, npc->owner, npc->enemy)))
85	((npc->enemy->type == PLAYER) && !(should_arena_attack(npc, npc->owner, npc->enemy)))	75	|| ((npc->enemy->type == PLAYER) && !(should_arena_attack (npc, npc->owner, npc->enemy)))
86	|| npc->enemy == npc->owner))	76	|| npc->enemy == npc->owner))
87	npc->enemy = NULL;	77	npc->enemy = NULL;
88		78
89		79
90	else if (!QUERY_FLAG(npc, FLAG_FRIENDLY) &&	80	else if (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (npc->enemy, FLAG_FRIENDLY) && npc->enemy->type != PLAYER))
91	(!QUERY_FLAG(npc->enemy, FLAG_FRIENDLY) && npc->enemy->type!=PLAYER))
92	npc->enemy=NULL;	81	npc->enemy = NULL;
93		82
94	/* I've noticed that pets could sometimes get an arrow as the	83	/* I've noticed that pets could sometimes get an arrow as the
95	* target enemy - this code below makes sure the enemy is something	84	* target enemy - this code below makes sure the enemy is something
96	* that should be attacked. My guess is that the arrow hits	85	* that should be attacked. My guess is that the arrow hits
97	* the creature/owner, and so the creature then takes that	86	* the creature/owner, and so the creature then takes that
98	* as the enemy to attack.	87	* as the enemy to attack.
99	*/	88	*/
100	else if (!QUERY_FLAG(npc->enemy, FLAG_MONSTER) &&	89	else if (!QUERY_FLAG (npc->enemy, FLAG_MONSTER)
101	!QUERY_FLAG(npc->enemy,FLAG_GENERATOR) &&	90	&& !QUERY_FLAG (npc->enemy, FLAG_GENERATOR)
102	npc->enemy->type!=PLAYER && npc->enemy->type != GOLEM)	91	&& npc->enemy->type != PLAYER
		92	&& npc->enemy->type != GOLEM)
103	npc->enemy=NULL;	93	npc->enemy = NULL;
104		94
105	}	95	}
		96
106	return can_detect_enemy(npc,npc->enemy,rv)?npc->enemy:NULL;	97	return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : NULL;
107	}	98	}
108		99
109	/* Returns the nearest living creature (monster or generator).	100	/* Returns the nearest living creature (monster or generator).
110	* Modified to deal with tiled maps properly.	101	* Modified to deal with tiled maps properly.
111	* Also fixed logic so that monsters in the lower directions were more	102	* Also fixed logic so that monsters in the lower directions were more
…		…
118	* the first few directions, it could very well choose something	109	* the first few directions, it could very well choose something
119	* 3 spaces away even though something directly north is closer.	110	* 3 spaces away even though something directly north is closer.
120	*	111	*
121	* this function is map tile aware.	112	* this function is map tile aware.
122	*/	113	*/
		114	object *
123	object *find_nearest_living_creature(object *npc) {	115	find_nearest_living_creature (object *npc)
		116	{
124	int i,mflags;	117	int i, mflags;
125	sint16 nx,ny;	118	sint16 nx, ny;
126	mapstruct *m;	119	maptile *m;
127	object *tmp;
128	int search_arr[SIZEOFFREE];	120	int search_arr[SIZEOFFREE];
129		121
130	get_search_arr(search_arr);	122	get_search_arr (search_arr);
		123
131	for(i=0;i<SIZEOFFREE;i++) {	124	for (i = 0; i < SIZEOFFREE; i++)
		125	{
132	/* modified to implement smart searching using search_arr	126	/* modified to implement smart searching using search_arr
133	* guidance array to determine direction of search order	127	* guidance array to determine direction of search order
134	*/	128	*/
135	nx = npc->x + freearr_x[search_arr[i]];	129	nx = npc->x + freearr_x[search_arr[i]];
136	ny = npc->y + freearr_y[search_arr[i]];	130	ny = npc->y + freearr_y[search_arr[i]];
137	m = npc->map;	131	m = npc->map;
138		132
139	mflags = get_map_flags(m, &m, nx, ny, &nx, &ny);	133	mflags = get_map_flags (m, &m, nx, ny, &nx, &ny);
		134
140	if (mflags & P_OUT_OF_MAP) continue;	135	if (mflags & P_OUT_OF_MAP)
		136	continue;
141		137
142	if (mflags & P_IS_ALIVE) {	138	if (mflags & P_IS_ALIVE)
143	tmp=get_map_ob(m,nx,ny);	139	{
144	while(tmp!=NULL && !QUERY_FLAG(tmp,FLAG_MONSTER)&&	140	for (object *tmp = m->at (nx, ny).top; tmp; tmp = tmp->below)
145	!QUERY_FLAG(tmp,FLAG_GENERATOR ) && tmp->type!=PLAYER)	141	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))	142	if (can_see_monsterP (m, nx, ny, i))
154	return tmp;	143	return tmp;
155	}	144	}
156	} /* is something living on this space */
157	}	145	}
158	return NULL; /* nothing found */
159	}
160		146
		147	return 0;
		148	}
161		149
162	/* Tries to find an enmy for npc. We pass the range vector since	150	/* Tries to find an enemy for npc. We pass the range vector since
163	* our caller will find the information useful.	151	* our caller will find the information useful.
164	* Currently, only move_monster calls this function.	152	* Currently, only move_monster calls this function.
165	* Fix function so that we always make calls to get_rangevector	153	* Fix function so that we always make calls to get_rangevector
166	* if we have a valid target - function as not doing so in	154	* if we have a valid target - function as not doing so in
167	* many cases.	155	* many cases.
168	*/	156	*/
169		157	object *
170	object *find_enemy(object *npc, rv_vector *rv)	158	find_enemy (object *npc, rv_vector * rv)
171	{	159	{
172	object *attacker, *tmp=NULL;	160	object *attacker, *tmp = NULL;
173		161
174	attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */	162	attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */
175	npc->attacked_by = NULL; /* always clear the attacker entry */	163	npc->attacked_by = 0; /* always clear the attacker entry */
176		164
177	/* if we berserk, we don't care about others - we attack all we can find */	165	/* if we berserk, we don't care about others - we attack all we can find */
178	if(QUERY_FLAG(npc,FLAG_BERSERK)) {	166	if (QUERY_FLAG (npc, FLAG_BERSERK))
		167	{
179	tmp = find_nearest_living_creature(npc);	168	tmp = find_nearest_living_creature (npc);
		169
		170	if (tmp)
180	if (tmp) get_rangevector(npc, tmp, rv, 0);	171	get_rangevector (npc, tmp, rv, 0);
		172
181	return tmp;	173	return tmp;
182	}	174	}
183		175
184	/* Here is the main enemy selection.	176	/* Here is the main enemy selection.
185	* We want this: if there is an enemy, attack him until its not possible or	177	* We want this: if there is an enemy, attack him until its not possible or
186	* one of both is dead.	178	* one of both is dead.
187	* If we have no enemy and we are...	179	* If we have no enemy and we are...
188	* a monster: try to find a player, a pet or a friendly monster	180	* 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	181	* 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	182	* a neutral: fight a attacker (but there should be none), then do nothing
191	* a pet: attack player enemy or a monster	183	* a pet: attack player enemy or a monster
192	*/	184	*/
193		185
194	/* pet move */	186	/* pet move */
195	if ((npc->attack_movement & HI4) == PETMOVE) {	187	if ((npc->attack_movement & HI4) == PETMOVE)
		188	{
196	tmp= get_pet_enemy(npc,rv);	189	tmp = get_pet_enemy (npc, rv);
		190
		191	if (tmp)
197	if (tmp) get_rangevector(npc, tmp, rv, 0);	192	get_rangevector (npc, tmp, rv, 0);
		193
198	return tmp;	194	return tmp;
199	}
200		195	}
		196
201	/* we check our old enemy. */	197	/* we check our old enemy. */
202	if((tmp=check_enemy(npc, rv))==NULL)	198	if (!(tmp = check_enemy (npc, rv)))
203	{	199	{
204	if(attacker) /* if we have an attacker, check him */	200	if (attacker) /* if we have an attacker, check him */
205	{	201	{
206	/* we want be sure this is the right one! */	202	/* TODO: that's not finished */
207	if(attacker->count == npc->attacked_by_count)	203	/* we don't want a fight evil vs evil or good against non evil */
		204
		205	if (QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (attacker, FLAG_NEUTRAL) || /* neutral */
		206	(QUERY_FLAG (npc, FLAG_FRIENDLY) && QUERY_FLAG (attacker, FLAG_FRIENDLY)) ||
		207	(!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (attacker, FLAG_FRIENDLY) && attacker->type != PLAYER)))
		208	CLEAR_FLAG (npc, FLAG_SLEEP); /* skip it, but lets wakeup */
		209	else if (on_same_map (npc, attacker)) /* that's the only thing we must know... */
208	{	210	{
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! */	211	CLEAR_FLAG (npc, FLAG_SLEEP); /* well, NOW we really should wake up! */
220	npc->enemy = attacker;	212	npc->enemy = attacker;
221	return attacker; /* yes, we face our attacker! */	213	return attacker; /* yes, we face our attacker! */
222	}
223	}	214	}
224	}	215	}
225		216
226	/* we have no legal enemy or attacker, so we try to target a new one */	217	/* 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) &&	218	if (!QUERY_FLAG (npc, FLAG_UNAGGRESSIVE) && !QUERY_FLAG (npc, FLAG_FRIENDLY) && !QUERY_FLAG (npc, FLAG_NEUTRAL))
228	!QUERY_FLAG(npc, FLAG_NEUTRAL))
229	{	219	{
230	npc->enemy = get_nearest_player(npc);	220	npc->enemy = get_nearest_player (npc);
231	if (npc->enemy)	221	if (npc->enemy)
232	tmp = check_enemy(npc,rv);	222	tmp = check_enemy (npc, rv);
233	}
234		223	}
235	}
236		224
		225	}
		226
237	return tmp;	227	return tmp;
238	}	228	}
239		229
240	/* Sees if this monster should wake up.	230	/* Sees if this monster should wake up.
241	* Currently, this is only called from move_monster, and	231	* Currently, this is only called from move_monster, and
242	* if enemy is set, then so should be rv.	232	* if enemy is set, then so should be rv.
243	* returns 1 if the monster should wake up, 0 otherwise.	233	* returns 1 if the monster should wake up, 0 otherwise.
244	*/	234	*/
245		235	int
246	int check_wakeup(object *op, object *enemy, rv_vector *rv) {	236	check_wakeup (object *op, object *enemy, rv_vector * rv)
		237	{
247	int radius = op->stats.Wis>MIN_MON_RADIUS?op->stats.Wis:MIN_MON_RADIUS;	238	int radius = op->stats.Wis > MIN_MON_RADIUS ? op->stats.Wis : MIN_MON_RADIUS;
248		239
249	/* Trim work - if no enemy, no need to do anything below */	240	/* Trim work - if no enemy, no need to do anything below */
250	if (!enemy) return 0;	241	if (!enemy)
		242	return 0;
251		243
252	/* blinded monsters can only find nearby objects to attack */	244	/* blinded monsters can only find nearby objects to attack */
253	if(QUERY_FLAG(op, FLAG_BLIND))	245	if (QUERY_FLAG (op, FLAG_BLIND))
254	radius = MIN_MON_RADIUS;	246	radius = MIN_MON_RADIUS;
255		247
256	/* This covers the situation where the monster is in the dark	248	/* 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	249	* and has an enemy. If the enemy has no carried light (or isnt
258	* glowing!) then the monster has trouble finding the enemy.	250	* glowing!) then the monster has trouble finding the enemy.
259	* Remember we already checked to see if the monster can see in	251	* Remember we already checked to see if the monster can see in
260	* the dark. */	252	* the dark. */
261		253
262	else if(op->map && op->map->darkness>0 && enemy && !enemy->invisible &&	254	else if (op->map && op->map->darkness > 0 && enemy && !enemy->invisible &&
263	!stand_in_light(enemy) &&
264	(!QUERY_FLAG(op,FLAG_SEE_IN_DARK) || !QUERY_FLAG(op,FLAG_SEE_INVISIBLE))) {	255	!stand_in_light (enemy) && (!QUERY_FLAG (op, FLAG_SEE_IN_DARK) || !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
		256	{
265	int dark = radius/(op->map->darkness);	257	int dark = radius / (op->map->darkness);
		258
266	radius = (dark>MIN_MON_RADIUS)?(dark+1):MIN_MON_RADIUS;	259	radius = (dark > MIN_MON_RADIUS) ? (dark + 1) : MIN_MON_RADIUS;
267	}	260	}
268	else if(!QUERY_FLAG(op,FLAG_SLEEP)) return 1;	261	else if (!QUERY_FLAG (op, FLAG_SLEEP))
		262	return 1;
269		263
270	/* enemy should already be on this map, so don't really need to check	264	/* enemy should already be on this map, so don't really need to check
271	* for that.	265	* for that.
272	*/	266	*/
273	if (rv->distance < (unsigned int) (QUERY_FLAG(enemy, FLAG_STEALTH) ? (radius / 2) + 1 : radius)) {	267	if (rv->distance < (unsigned int) (QUERY_FLAG (enemy, FLAG_STEALTH) ? (radius / 2) + 1 : radius))
		268	{
274	CLEAR_FLAG(op,FLAG_SLEEP);	269	CLEAR_FLAG (op, FLAG_SLEEP);
275	return 1;	270	return 1;
276	}	271	}
277	return 0;	272	return 0;
278	}	273	}
279		274
		275	int
280	int move_randomly(object *op) {	276	move_randomly (object *op)
281	int i;	277	{
282
283	/* Give up to 15 chances for a monster to move randomly */	278	/* Give up to 15 chances for a monster to move randomly */
284	for(i=0;i<15;i++) {	279	for (int i = 0; i < 15; i++)
285	if(move_object(op,RANDOM()%8+1))	280	if (move_object (op, rndm (8) + 1))
286	return 1;	281	return 1;
287	}	282
288	return 0;	283	return 0;
289	}	284	}
290		285
291	/*	286	/*
292	* Move-monster returns 1 if the object has been freed, otherwise 0.	287	* Move-monster returns 1 if the object has been freed, otherwise 0.
293	*/	288	*/
294		289	int
295	int move_monster(object *op) {	290	move_monster (object *op)
		291	{
296	int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */	292	int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */
297	object *owner, *enemy, *part, *oph=op;	293	object *owner, *enemy, *part, *oph = op;
298	rv_vector rv;	294	rv_vector rv;
299		295
300	/* Monsters not on maps don't do anything. These monsters are things	296	/* Monsters not on maps don't do anything. These monsters are things
301	* Like royal guards in city dwellers inventories.	297	* Like royal guards in city dwellers inventories.
302	*/	298	*/
303	if (!op->map) return 0;	299	if (!op->map)
		300	return 0;
304		301
305	/* for target facing, we copy this value here for fast access */	302	/* for target facing, we copy this value here for fast access */
306	if(oph->head) /* force update the head - one arch one pic */	303	if (oph->head) /* force update the head - one arch one pic */
307	oph = oph->head;	304	oph = oph->head;
308		305
309	if (QUERY_FLAG(op, FLAG_NO_ATTACK)) /* we never ever attack */	306	if (QUERY_FLAG (op, FLAG_NO_ATTACK)) /* we never ever attack */
310	enemy = op->enemy = NULL;	307	enemy = op->enemy = NULL;
311	else if((enemy= find_enemy(op, &rv)))	308	else if ((enemy = find_enemy (op, &rv)))
312	{
313	/* we have an enemy, just tell him we want him dead */	309	/* we have an enemy, just tell him we want him dead */
314	enemy->attacked_by = op; /* our ptr */	310	enemy->attacked_by = op; /* our ptr */
315	enemy->attacked_by_count = op->count; /* our tag */	311
316	}
317
318	/* generate hp, if applicable */	312	/* generate hp, if applicable */
319	if(op->stats.Con > 0 && op->stats.hp < op->stats.maxhp) {	313	if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
320		314	{
321	/* last heal is in funny units. Dividing by speed puts	315	/* last heal is in funny units. Dividing by speed puts
322	* the regeneration rate on a basis of time instead of	316	* the regeneration rate on a basis of time instead of
323	* #moves the monster makes. The scaling by 8 is	317	* #moves the monster makes. The scaling by 8 is
324	* to capture 8th's of a hp fraction regens	318	* to capture 8th's of a hp fraction regens
325	*	319	*
326	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)	320	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
327	* overflow might produce monsters with negative hp.	321	* overflow might produce monsters with negative hp.
328	*/	322	*/
329		323
330	op->last_heal+= (int)((float)(8*op->stats.Con)/FABS(op->speed));	324	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 */	325	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;	326	op->last_heal %= 32;
333		327
334	/* So if the monster has gained enough HP that they are no longer afraid */	328	/* So if the monster has gained enough HP that they are no longer afraid */
335	if (QUERY_FLAG(op,FLAG_RUN_AWAY) &&	329	if (QUERY_FLAG (op, FLAG_RUN_AWAY) && op->stats.hp >= (signed short) (((float) op->run_away / (float) 100) * (float) op->stats.maxhp))
336	op->stats.hp >= (signed short)(((float)op->run_away/(float)100)*
337	(float)op->stats.maxhp))
338	CLEAR_FLAG(op, FLAG_RUN_AWAY);	330	CLEAR_FLAG (op, FLAG_RUN_AWAY);
339		331
340	if(op->stats.hp>op->stats.maxhp)	332	if (op->stats.hp > op->stats.maxhp)
341	op->stats.hp=op->stats.maxhp;	333	op->stats.hp = op->stats.maxhp;
342	}	334	}
343		335
344	/* generate sp, if applicable */	336	/* generate sp, if applicable */
345	if(op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp) {	337	if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
346		338	{
347	/* last_sp is in funny units. Dividing by speed puts	339	/* last_sp is in funny units. Dividing by speed puts
348	* the regeneration rate on a basis of time instead of	340	* the regeneration rate on a basis of time instead of
349	* #moves the monster makes. The scaling by 8 is	341	* #moves the monster makes. The scaling by 8 is
350	* to capture 8th's of a sp fraction regens	342	* to capture 8th's of a sp fraction regens
351	*	343	*
352	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)	344	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
353	* overflow might produce monsters with negative sp.	345	* overflow might produce monsters with negative sp.
354	*/	346	*/
355		347
356	op->last_sp+= (int)((float)(8*op->stats.Pow)/FABS(op->speed));	348	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 */	349	op->stats.sp = MIN (op->stats.sp + op->last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
358	op->last_sp%=128;	350	op->last_sp %= 128;
359	}	351	}
360		352
361	/* this should probably get modified by many more values.	353	/* this should probably get modified by many more values.
362	* (eg, creatures resistance to fear, level, etc. )	354	* (eg, creatures resistance to fear, level, etc. )
363	*/	355	*/
364	if(QUERY_FLAG(op, FLAG_SCARED) &&!(RANDOM()%20)) {	356	if (QUERY_FLAG (op, FLAG_SCARED) && !(rndm (20)))
365	CLEAR_FLAG(op,FLAG_SCARED); /* Time to regain some "guts"... */	357	CLEAR_FLAG (op, FLAG_SCARED); /* Time to regain some "guts"... */
366	}
367		358
368	if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))	359	if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
369	return QUERY_FLAG (op, FLAG_FREED);	360	return QUERY_FLAG (op, FLAG_FREED);
370		361
371	if ( QUERY_FLAG(op, FLAG_SLEEP) || QUERY_FLAG(op, FLAG_BLIND) ||	362	if (QUERY_FLAG (op, FLAG_SLEEP) || QUERY_FLAG (op, FLAG_BLIND) ||
372	((op->map->darkness>0) && !QUERY_FLAG(op,FLAG_SEE_IN_DARK) &&	363	((op->map->darkness > 0) && !QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
373	!QUERY_FLAG(op,FLAG_SEE_INVISIBLE))) {
374	if(!check_wakeup(op,enemy,&rv))	364	if (!check_wakeup (op, enemy, &rv))
375	return 0;	365	return 0;
376	}
377		366
378	/* check if monster pops out of hidden spot */	367	/* check if monster pops out of hidden spot */
		368	if (op->flag [FLAG_HIDDEN])
379	if(op->hide) do_hidden_move(op);	369	do_hidden_move (op);
380		370
381	if(op->pick_up)	371	if (op->pick_up)
382	monster_check_pickup(op);	372	monster_check_pickup (op);
383		373
384	if(op->will_apply)	374	if (op->will_apply)
385	monster_apply_below(op); /* Check for items to apply below */	375	monster_apply_below (op); /* Check for items to apply below */
386		376
387	/* If we don't have an enemy, do special movement or the like */	377	/* If we don't have an enemy, do special movement or the like */
388	if(!enemy) {	378	if (!enemy)
		379	{
389	if(QUERY_FLAG(op, FLAG_ONLY_ATTACK)) {	380	if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
390	remove_ob(op);	381	{
391	free_object(op);	382	op->drop_and_destroy ();
392	return 1;	383	return 1;
393	}	384	}
394		385
395	/* Probably really a bug for a creature to have both	386	/* Probably really a bug for a creature to have both
396	* stand still and a movement type set.	387	* stand still and a movement type set.
397	*/	388	*/
398	if(!QUERY_FLAG(op, FLAG_STAND_STILL)) {	389	if (!QUERY_FLAG (op, FLAG_STAND_STILL))
		390	{
399	if (op->attack_movement & HI4)	391	if (op->attack_movement & HI4)
400	{	392	{
401	switch (op->attack_movement & HI4) {	393	switch (op->attack_movement & HI4)
		394	{
402	case (PETMOVE):	395	case (PETMOVE):
403	pet_move (op);	396	pet_move (op);
404	break;	397	break;
405		398
406	case (CIRCLE1):	399	case (CIRCLE1):
407	circ1_move (op);	400	circ1_move (op);
408	break;	401	break;
409		402
410	case (CIRCLE2):	403	case (CIRCLE2):
411	circ2_move (op);	404	circ2_move (op);
412	break;	405	break;
413		406
414	case (PACEV):	407	case (PACEV):
415	pace_movev(op);	408	pace_movev (op);
416	break;	409	break;
417		410
418	case (PACEH):	411	case (PACEH):
419	pace_moveh(op);	412	pace_moveh (op);
420	break;	413	break;
421		414
422	case (PACEV2):	415	case (PACEV2):
423	pace2_movev (op);	416	pace2_movev (op);
424	break;	417	break;
425		418
426	case (PACEH2):	419	case (PACEH2):
427	pace2_moveh (op);	420	pace2_moveh (op);
428	break;	421	break;
429		422
430	case (RANDO):	423	case (RANDO):
431	rand_move (op);	424	rand_move (op);
432	break;	425	break;
433		426
434	case (RANDO2):	427	case (RANDO2):
435	move_randomly (op);	428	move_randomly (op);
436	break;	429	break;
437	}	430	}
		431
		432	return 0;
		433	}
		434	else if (QUERY_FLAG (op, FLAG_RANDOM_MOVE))
		435	move_randomly (op);
		436	} /* stand still */
		437
		438	return 0;
		439	} /* no enemy */
		440
		441	/* We have an enemy. Block immediately below is for pets */
		442	if ((op->attack_movement & HI4) == PETMOVE
		443	&& (owner = op->owner) != NULL
		444	&& !on_same_map (op, owner)
		445	&& !owner->flag [FLAG_REMOVED])
		446	return follow_owner (op, owner);
		447
		448	/* doppleganger code to change monster facing to that of the nearest
		449	* player. Hmm. The code is here, but no monster in the current
		450	* arch set uses it.
		451	*/
		452	if ((op->race != NULL) && strcmp (op->race, "doppleganger") == 0)
		453	{
		454	op->face = enemy->face;
		455	op->name = enemy->name;
		456	}
		457
		458	/* Calculate range information for closest body part - this
		459	* is used for the 'skill' code, which isn't that smart when
		460	* it comes to figuring it out - otherwise, giants throw boulders
		461	* into themselves.
		462	*/
		463	get_rangevector (op, enemy, &rv, 0);
		464
		465	/* Move the check for scared up here - if the monster was scared,
		466	* we were not doing any of the logic below, so might as well save
		467	* a few cpu cycles.
		468	*/
		469	if (!QUERY_FLAG (op, FLAG_SCARED))
		470	{
		471	rv_vector rv1;
		472
		473	/* now we test every part of an object .... this is a real ugly piece of code */
		474	for (part = op; part; part = part->more)
		475	{
		476	get_rangevector (part, enemy, &rv1, 0x1);
		477	dir = rv1.direction;
		478
		479	/* hm, not sure about this part - in original was a scared flag here too
		480	* but that we test above... so can be old code here
		481	*/
		482	if (QUERY_FLAG (op, FLAG_RUN_AWAY))
		483	dir = absdir (dir + 4);
		484
		485	if (QUERY_FLAG (op, FLAG_CONFUSED))
		486	dir = absdir (dir + rndm (3) + rndm (3) - 2);
		487
		488	if (QUERY_FLAG (op, FLAG_CAST_SPELL) && !(rndm (3)))
		489	if (monster_cast_spell (op, part, enemy, dir, &rv1))
		490	return 0;
		491
		492	if (QUERY_FLAG (op, FLAG_READY_SCROLL) && !(rndm (3)))
		493	if (monster_use_scroll (op, part, enemy, dir, &rv1))
		494	return 0;
		495
		496	if (QUERY_FLAG (op, FLAG_READY_RANGE) && !(rndm (3)))
		497	if (monster_use_range (op, part, enemy, dir))
		498	return 0;
		499
		500	if (QUERY_FLAG (op, FLAG_READY_SKILL) && !(rndm (3)))
		501	if (monster_use_skill (op, rv.part, enemy, rv.direction))
		502	return 0;
		503
		504	if (QUERY_FLAG (op, FLAG_READY_BOW) && !(rndm (2)))
		505	if (monster_use_bow (op, part, enemy, dir))
		506	return 0;
		507	} /* for processing of all parts */
		508	} /* If not scared */
		509
		510
		511	part = rv.part;
		512	dir = rv.direction;
		513
		514	if (QUERY_FLAG (op, FLAG_SCARED) || QUERY_FLAG (op, FLAG_RUN_AWAY))
		515	dir = absdir (dir + 4);
		516
		517	if (QUERY_FLAG (op, FLAG_CONFUSED))
		518	dir = absdir (dir + rndm (3) + rndm (3) - 2);
		519
		520	pre_att_dir = dir; /* remember the original direction */
		521
		522	if ((op->attack_movement & LO4) && !QUERY_FLAG (op, FLAG_SCARED))
		523	{
		524	switch (op->attack_movement & LO4)
		525	{
		526	case DISTATT:
		527	dir = dist_att (dir, op, enemy, part, &rv);
		528	break;
		529
		530	case RUNATT:
		531	dir = run_att (dir, op, enemy, part, &rv);
		532	break;
		533
		534	case HITRUN:
		535	dir = hitrun_att (dir, op, enemy);
		536	break;
		537
		538	case WAITATT:
		539	dir = wait_att (dir, op, enemy, part, &rv);
		540	break;
		541
		542	case RUSH: /* default - monster normally moves towards player */
		543	case ALLRUN:
		544	break;
		545
		546	case DISTHIT:
		547	dir = disthit_att (dir, op, enemy, part, &rv);
		548	break;
		549
		550	case WAIT2:
		551	dir = wait_att2 (dir, op, enemy, part, &rv);
		552	break;
		553
		554	default:
		555	LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
		556	}
		557	}
		558
		559	if (!dir)
		560	return 0;
		561
		562	if (!QUERY_FLAG (op, FLAG_STAND_STILL))
		563	{
		564	if (move_object (op, dir)) /* Can the monster move directly toward player? */
		565	{
		566	/* elmex: Turn our monster after it moved if it has DISTATT attack */
		567	if ((op->attack_movement & LO4) == DISTATT)
		568	op->direction = pre_att_dir;
		569
		570	return 0;
		571	}
		572
		573	if (QUERY_FLAG (op, FLAG_SCARED) || !can_hit (part, enemy, &rv) || QUERY_FLAG (op, FLAG_RUN_AWAY))
		574	{
		575	/* Try move around corners if !close */
		576	int maxdiff = (QUERY_FLAG (op, FLAG_ONLY_ATTACK) || RANDOM () & 1) ? 1 : 2;
		577
		578	for (diff = 1; diff <= maxdiff; diff++)
		579	{
		580	/* try different detours */
		581	int m = 1 - (RANDOM () & 2); /* Try left or right first? */
		582
		583	if (move_object (op, absdir (dir + diff * m)) || move_object (op, absdir (dir - diff * m)))
438	return 0;	584	return 0;
439	}	585	}
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;
564
565	if (!QUERY_FLAG(op,FLAG_STAND_STILL)) {
566	if(move_object(op,dir)) /* Can the monster move directly toward player? */
567	{
568	/* elmex: Turn our monster after it moved if it has DISTATT attack */
569	if ((op->attack_movement & LO4) == DISTATT)
570	op->direction = pre_att_dir;
571
572	return 0;
573	}	586	}
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 */	587	} /* if monster is not standing still */
589		588
590	/* elmex: Turn our monster after it moved if it has DISTATT attack */	589	/* elmex: Turn our monster after it moved if it has DISTATT attack */
591	if ((op->attack_movement & LO4) == DISTATT)	590	if ((op->attack_movement & LO4) == DISTATT)
592	op->direction = pre_att_dir;	591	op->direction = pre_att_dir;
593		592
594	/*	593	/*
595	* Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random	594	* Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
596	* direction if they can't move away.	595	* direction if they can't move away.
597	*/	596	*/
598	if (!QUERY_FLAG(op, FLAG_ONLY_ATTACK)&&(QUERY_FLAG(op,FLAG_RUN_AWAY)||QUERY_FLAG(op, FLAG_SCARED)))	597	if (!QUERY_FLAG (op, FLAG_ONLY_ATTACK) && (QUERY_FLAG (op, FLAG_RUN_AWAY) || QUERY_FLAG (op, FLAG_SCARED)))
599	if(move_randomly(op))	598	if (move_randomly (op))
600	return 0;	599	return 0;
601		600
602	/*	601	/*
603	* Try giving the monster a new enemy - the player that is closest	602	* 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	603	* to it. In this way, it won't just keep trying to get to a target
605	* that is inaccessible.	604	* that is inaccessible.
606	* This could be more clever - it should go through a list of several	605	* 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	606	* enemies, as it is now, you could perhaps get situations where there
608	* are two players flanking the monster at close distance, but which	607	* 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	608	* 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	609	* the monster could get to - as it is, the monster won't look at that
611	* third one.	610	* third one.
612	*/	611	*/
613	if (!QUERY_FLAG(op, FLAG_FRIENDLY) && enemy == op->enemy)	612	if (!QUERY_FLAG (op, FLAG_FRIENDLY) && enemy == op->enemy)
614	{	613	{
615	object *nearest_player = get_nearest_player(op);	614	object *nearest_player = get_nearest_player (op);
		615
616	if (nearest_player && nearest_player != enemy && !can_hit(part,enemy,&rv)) {	616	if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
		617	{
617	op->enemy = NULL;	618	op->enemy = NULL;
618	enemy = nearest_player;	619	enemy = nearest_player;
619	}	620	}
620	}	621	}
621		622
622	if(!QUERY_FLAG(op, FLAG_SCARED)&&can_hit(part,enemy,&rv))	623	if (!QUERY_FLAG (op, FLAG_SCARED) && can_hit (part, enemy, &rv))
623	{	624	{
624	/* The adjustement to wc that was here before looked totally bogus -	625	/* 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	* since wc can in fact get negative, that would mean by adding
626	* the current wc, the creature gets better? Instead, just	627	* the current wc, the creature gets better? Instead, just
627	* add a fixed amount - nasty creatures that are runny away should	628	* add a fixed amount - nasty creatures that are runny away should
628	* still be pretty nasty.	629	* still be pretty nasty.
629	*/	630	*/
630	if(QUERY_FLAG(op,FLAG_RUN_AWAY))	631	if (QUERY_FLAG (op, FLAG_RUN_AWAY))
631	{	632	{
632	part->stats.wc+=10;	633	part->stats.wc += 10;
633	(void)skill_attack(enemy,part,0,NULL, NULL);	634	skill_attack (enemy, part, 0, NULL, NULL);
634	part->stats.wc-=10;	635	part->stats.wc -= 10;
635	}	636	}
636	else	637	else
637	(void)skill_attack(enemy,part,0,NULL, NULL);	638	skill_attack (enemy, part, 0, NULL, NULL);
638	} /* if monster is in attack range */	639	} /* if monster is in attack range */
639		640
640	if(QUERY_FLAG(part,FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */	641	if (QUERY_FLAG (part, FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
641	return 1;	642	return 1;
642		643
643	if(QUERY_FLAG(op, FLAG_ONLY_ATTACK))	644	if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
		645	{
		646	op->drop_and_destroy ();
		647	return 1;
644	{	648	}
645	remove_ob(op);	649
646	free_object(op);	650	return 0;
		651	}
		652
		653	int
		654	can_hit (object *ob1, object *ob2, rv_vector * rv)
		655	{
		656	object *more;
		657	rv_vector rv1;
		658
		659	if (QUERY_FLAG (ob1, FLAG_CONFUSED) && !(rndm (3)))
		660	return 0;
		661
		662	if (abs (rv->distance_x) < 2 && abs (rv->distance_y) < 2)
		663	return 1;
		664
		665	/* check all the parts of ob2 - just because we can't get to
		666	* its head doesn't mean we don't want to pound its feet
		667	*/
		668	for (more = ob2->more; more != NULL; more = more->more)
		669	{
		670	get_rangevector (ob1, more, &rv1, 0);
		671	if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
647	return 1;	672	return 1;
648	}	673	}
		674
649	return 0;	675	return 0;
650	}
651
652	int can_hit(object *ob1,object *ob2, rv_vector *rv) {
653	object *more;
654	rv_vector rv1;
655
656	if(QUERY_FLAG(ob1,FLAG_CONFUSED)&&!(RANDOM()%3))
657	return 0;
658
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	}
668	return 0;
669
670	}	676	}
671		677
672	/* Returns 1 is monster should cast spell sp at an enemy	678	/* Returns 1 is monster should cast spell sp at an enemy
673	* Returns 0 if the monster should not cast this spell.	679	* Returns 0 if the monster should not cast this spell.
674	*	680	*
…		…
683	* This could be a lot smarter - if there are few monsters around,	689	* 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,	690	* then disease might not be as bad. Likewise, if the monster is damaged,
685	* the right type of healing spell could be useful.	691	* the right type of healing spell could be useful.
686	*/	692	*/
687		693
		694	static int
688	static int monster_should_cast_spell(object *monster, object *spell_ob)	695	monster_should_cast_spell (object *monster, object *spell_ob)
689	{	696	{
690	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||	697	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||
691	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||	698	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||
692	spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||	699	spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||
693	spell_ob->subtype == SP_MAGIC_MISSILE || spell_ob->subtype == SP_SUMMON_GOLEM ||	700	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 ||	701	spell_ob->subtype == SP_MAGIC_WALL || spell_ob->subtype == SP_SUMMON_MONSTER ||
695	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM ||	702	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE)
696	spell_ob->subtype == SP_INVISIBLE)
697
698	return 1;
699
700	return 0;	703	return 1;
701	}
702		704
		705	return 0;
		706	}
703		707
704	#define MAX_KNOWN_SPELLS 20	708	#define MAX_KNOWN_SPELLS 20
705		709
706	/* Returns a randomly selected spell. This logic is still	710	/* Returns a randomly selected spell. This logic is still
707	* less than ideal. This code also only seems to deal with	711	* less than ideal. This code also only seems to deal with
708	* wizard spells, as the check is against sp, and not grace.	712	* wizard spells, as the check is against sp, and not grace.
709	* can mosnters know cleric spells?	713	* can mosnters know cleric spells?
710	*/	714	*/
		715	object *
711	object *monster_choose_random_spell(object *monster) {	716	monster_choose_random_spell (object *monster)
		717	{
712	object *altern[MAX_KNOWN_SPELLS];	718	object *altern[MAX_KNOWN_SPELLS];
713	object *tmp;
714	int i=0;	719	int i = 0;
715		720
716	for(tmp=monster->inv;tmp!=NULL;tmp=tmp->below)	721	for (object *tmp = monster->inv; tmp; tmp = tmp->below)
717	if (tmp->type==SPELLBOOK || tmp->type==SPELL) {	722	if (tmp->type == SPELLBOOK || tmp->type == SPELL)
		723	{
718	/* Check and see if it's actually a useful spell.	724	/* Check and see if it's actually a useful spell.
719	* If its a spellbook, the spell is actually the inventory item.	725	* If its a spellbook, the spell is actually the inventory item.
720	* if it is a spell, then it is just the object itself.	726	* if it is a spell, then it is just the object itself.
721	*/	727	*/
722	if (monster_should_cast_spell(monster, (tmp->type==SPELLBOOK)?tmp->inv:tmp)) {	728	if (monster_should_cast_spell (monster, (tmp->type == SPELLBOOK) ? tmp->inv : tmp))
		729	{
723	altern[i++]=tmp;	730	altern [i++] = tmp;
		731
724	if(i==MAX_KNOWN_SPELLS)	732	if (i == MAX_KNOWN_SPELLS)
725	break;	733	break;
726	}	734	}
727	}	735	}
728	if(!i)	736
729	return NULL;	737	return i ? altern [rndm (i)] : 0;
730	return altern[RANDOM()%i];
731	}	738	}
732		739
733	/* This checks to see if the monster should cast a spell/ability.	740	/* 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.	741	* it returns true if the monster casts a spell, 0 if he doesn't.
735	* head is the head of the monster.	742	* head is the head of the monster.
736	* part is the part of the monster we are checking against.	743	* part is the part of the monster we are checking against.
737	* pl is the target.	744	* pl is the target.
738	* dir is the direction to case.	745	* dir is the direction to case.
739	* rv is the vector which describes where the enemy is.	746	* rv is the vector which describes where the enemy is.
740	*/	747	*/
741		748	int
742	int monster_cast_spell(object *head, object *part,object *pl,int dir, rv_vector *rv) {	749	monster_cast_spell (object *head, object *part, object *pl, int dir, rv_vector * rv)
		750	{
743	object *spell_item;	751	object *spell_item;
744	object *owner;	752	object *owner;
745	rv_vector rv1;	753	rv_vector rv1;
746		754
747	/* If you want monsters to cast spells over friends, this spell should	755	/* 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	756	* 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	757	* 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	758	* clear path to the player, the side aspects of the code will still hit
751	* other monsters)	759	* other monsters)
752	*/	760	*/
753	if(!(dir=path_to_player(part,pl,0)))	761	if (!(dir = path_to_player (part, pl, 0)))
754	return 0;	762	return 0;
		763
		764	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
755		765	{
756	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {
757	get_rangevector(head, owner, &rv1, 0x1);	766	get_rangevector (head, owner, &rv1, 0x1);
758	if(dirdiff(dir,rv1.direction) < 2) {	767	if (dirdiff (dir, rv1.direction) < 2)
759	return 0; /* Might hit owner with spell */	768	return 0; /* Might hit owner with spell */
760	}
761	}	769	}
762		770
763	if(QUERY_FLAG(head,FLAG_CONFUSED))	771	if (QUERY_FLAG (head, FLAG_CONFUSED))
764	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	772	dir = absdir (dir + rndm (3) + rndm (3) - 2);
765		773
766	/* If the monster hasn't already chosen a spell, choose one	774	/* 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	775	* 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).	776	* could be different by the time the monster goes again).
769	*/	777	*/
770	if(head->spellitem==NULL) {	778	if (head->spellitem == NULL)
		779	{
771	if((spell_item=monster_choose_random_spell(head))==NULL) {	780	if ((spell_item = monster_choose_random_spell (head)) == NULL)
		781	{
772	LOG(llevMonster,"Turned off spells in %s\n",&head->name);	782	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 */	783	CLEAR_FLAG (head, FLAG_CAST_SPELL); /* Will be turned on when picking up book */
774	return 0;	784	return 0;
775	}	785	}
		786
776	if (spell_item->type == SPELLBOOK) {	787	if (spell_item->type == SPELLBOOK)
		788	{
777	if (!spell_item->inv) {	789	if (!spell_item->inv)
		790	{
778	LOG(llevError,"spellbook %s does not contain a spell?\n", &spell_item->name);	791	LOG (llevError, "spellbook %s does not contain a spell?\n", &spell_item->name);
779	return 0;	792	return 0;
780	}	793	}
		794
781	spell_item=spell_item->inv;	795	spell_item = spell_item->inv;
782	}	796	}
783	}	797	}
784	else	798	else
785	spell_item=head->spellitem;	799	spell_item = head->spellitem;
786		800
787	if (!spell_item) return 0;	801	if (!spell_item)
		802	return 0;
788		803
789	/* Best guess this is a defensive/healing spell */	804	/* Best guess this is a defensive/healing spell */
790	if (spell_item->range<=1 || spell_item->stats.dam < 0)	805	if (spell_item->range <= 1 || spell_item->stats.dam < 0)
791	dir = 0;	806	dir = 0;
792		807
793	/* Monster doesn't have enough spell-points */	808	/* Monster doesn't have enough spell-points */
794	if(head->stats.sp<SP_level_spellpoint_cost(head,spell_item, SPELL_MANA))	809	if (head->stats.sp < SP_level_spellpoint_cost (head, spell_item, SPELL_MANA))
795	return 0;	810	return 0;
796		811
797	if(head->stats.grace<SP_level_spellpoint_cost(head,spell_item, SPELL_GRACE))	812	if (head->stats.grace < SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE))
798	return 0;	813	return 0;
799		814
800	head->stats.sp-=SP_level_spellpoint_cost(head,spell_item, SPELL_MANA);	815	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);	816	head->stats.grace -= SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE);
802		817
803	/* set this to null, so next time monster will choose something different */	818	/* set this to null, so next time monster will choose something different */
804	head->spellitem = NULL;	819	head->spellitem = NULL;
805		820
806	return cast_spell(part,part,dir, spell_item, NULL);	821	return cast_spell (part, part, dir, spell_item, NULL);
807	}	822	}
808		823
809		824	int
810	int monster_use_scroll(object *head, object *part,object *pl,int dir, rv_vector *rv) {	825	monster_use_scroll (object *head, object *part, object *pl, int dir, rv_vector * rv)
		826	{
811	object *scroll;	827	object *scroll;
812	object *owner;	828	object *owner;
813	rv_vector rv1;	829	rv_vector rv1;
814		830
815	/* If you want monsters to cast spells over friends, this spell should	831	/* 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	832	* 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	833	* 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	834	* clear path to the player, the side aspects of the code will still hit
819	* other monsters)	835	* other monsters)
820	*/	836	*/
821	if(!(dir=path_to_player(part,pl,0)))	837	if (!(dir = path_to_player (part, pl, 0)))
822	return 0;	838	return 0;
		839
		840	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
823		841	{
824	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {
825	get_rangevector(head, owner, &rv1, 0x1);	842	get_rangevector (head, owner, &rv1, 0x1);
826	if(dirdiff(dir,rv1.direction) < 2) {	843	if (dirdiff (dir, rv1.direction) < 2)
827	return 0; /* Might hit owner with spell */
828	}	844	{
		845	return 0; /* Might hit owner with spell */
		846	}
829	}	847	}
830		848
831	if(QUERY_FLAG(head,FLAG_CONFUSED))	849	if (QUERY_FLAG (head, FLAG_CONFUSED))
832	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	850	dir = absdir (dir + rndm (3) + rndm (3) - 2);
833		851
834	for (scroll=head->inv; scroll; scroll=scroll->below)	852	for (scroll = head->inv; scroll; scroll = scroll->below)
835	if (scroll->type == SCROLL && monster_should_cast_spell(head, scroll->inv)) break;	853	if (scroll->type == SCROLL && monster_should_cast_spell (head, scroll->inv))
		854	break;
836		855
837	/* Used up all his scrolls, so nothing do to */	856	/* Used up all his scrolls, so nothing do to */
838	if (!scroll) {	857	if (!scroll)
		858	{
839	CLEAR_FLAG(head, FLAG_READY_SCROLL);	859	CLEAR_FLAG (head, FLAG_READY_SCROLL);
840	return 0;	860	return 0;
841	}	861	}
842		862
843	/* Spell should be cast on caster (ie, heal, strength) */	863	/* Spell should be cast on caster (ie, heal, strength) */
844	if (scroll->inv->range==0)	864	if (scroll->inv->range == 0)
845	dir = 0;	865	dir = 0;
846		866
847	apply_scroll(part, scroll, dir);	867	apply_scroll (part, scroll, dir);
848	return 1;	868	return 1;
849	}	869	}
850		870
851	/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.	871	/* 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	872	* Note that monsters do not need the skills SK_MELEE_WEAPON and
853	* SK_MISSILE_WEAPON to make those respective attacks, if we	873	* SK_MISSILE_WEAPON to make those respective attacks, if we
…		…
856	*	876	*
857	* The skills we are treating here are all but those. -b.t.	877	* The skills we are treating here are all but those. -b.t.
858	*	878	*
859	* At the moment this is only useful for throwing, perhaps for	879	* 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	880	* stealing. TODO: This should be more integrated in the game. -MT, 25.11.01
861	*/	881	*/
862		882	int
863	int monster_use_skill(object *head, object *part, object *pl,int dir) {	883	monster_use_skill (object *head, object *part, object *pl, int dir)
		884	{
864	object *skill, *owner;	885	object *skill, *owner;
865		886
866	if(!(dir=path_to_player(part,pl,0)))	887	if (!(dir = path_to_player (part, pl, 0)))
867	return 0;	888	return 0;
868		889
869	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	890	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
		891	{
870	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	892	int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
		893
871	if(dirdiff(dir,dir2) < 1)	894	if (dirdiff (dir, dir2) < 1)
872	return 0; /* Might hit owner with skill -thrown rocks for example ?*/	895	return 0; /* Might hit owner with skill -thrown rocks for example ? */
873	}	896	}
		897
874	if(QUERY_FLAG(head,FLAG_CONFUSED))	898	if (QUERY_FLAG (head, FLAG_CONFUSED))
875	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	899	dir = absdir (dir + rndm (3) + rndm (3) - 2);
876		900
877	/* skill selection - monster will use the next unused skill.	901	/* skill selection - monster will use the next unused skill.
878	* well...the following scenario will allow the monster to	902	* well...the following scenario will allow the monster to
879	* toggle between 2 skills. One day it would be nice to make	903	* toggle between 2 skills. One day it would be nice to make
880	* more skills available to monsters.	904	* more skills available to monsters.
881	*/	905	*/
882
883	for(skill=head->inv;skill!=NULL;skill=skill->below)	906	for (skill = head->inv; skill; skill = skill->below)
884	if(skill->type==SKILL && skill!=head->chosen_skill) {	907	if (skill->type == SKILL && skill != head->chosen_skill)
		908	{
885	head->chosen_skill=skill;	909	head->chosen_skill = skill;
886	break;	910	break;
887	}	911	}
888		912
889	if(!skill && !head->chosen_skill) {	913	if (!skill && !head->chosen_skill)
		914	{
890	LOG(llevDebug,"Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n",	915	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);	916	CLEAR_FLAG (head, FLAG_READY_SKILL);
893	return 0;	917	return 0;
894	}	918	}
		919
895	/* use skill */	920	/* use skill */
896	return do_skill(head, part, head->chosen_skill,dir,NULL);	921	return do_skill (head, part, head->chosen_skill, dir, NULL);
897	}	922	}
898		923
899	/* Monster will use a ranged spell attack. */	924	/* Monster will use a ranged spell attack. */
900		925	int
901	int monster_use_range(object *head,object *part,object *pl,int dir)	926	monster_use_range (object *head, object *part, object *pl, int dir)
902	{	927	{
903	object *wand, *owner;	928	object *wand, *owner;
904	int at_least_one = 0;	929	int at_least_one = 0;
905		930
906	if(!(dir=path_to_player(part,pl,0)))	931	if (!(dir = path_to_player (part, pl, 0)))
907	return 0;	932	return 0;
908		933
909	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	934	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
		935	{
910	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	936	int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
		937
911	if(dirdiff(dir,dir2) < 2)	938	if (dirdiff (dir, dir2) < 2)
912	return 0; /* Might hit owner with spell */	939	return 0; /* Might hit owner with spell */
913	}	940	}
		941
914	if(QUERY_FLAG(head,FLAG_CONFUSED))	942	if (QUERY_FLAG (head, FLAG_CONFUSED))
915	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	943	dir = absdir (dir + rndm (3) + rndm (3) - 2);
916		944
917	for(wand=head->inv;wand!=NULL;wand=wand->below)	945	for (wand = head->inv; wand; wand = wand->below)
918	{	946	{
919	if (wand->type == WAND)	947	if (wand->type == WAND)
		948	{
		949	/* Found a wand, let's see if it has charges left */
		950	at_least_one = 1;
		951	if (wand->stats.food <= 0)
		952	continue;
		953
		954	cast_spell (head, wand, dir, wand->inv, NULL);
		955
		956	if (!(--wand->stats.food))
920	{	957	{
921	/* Found a wand, let's see if it has charges left */	958	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	{	959	{
930	if ( wand->arch )
931	{
932	CLEAR_FLAG(wand, FLAG_ANIMATE);	960	CLEAR_FLAG (wand, FLAG_ANIMATE);
933	wand->face = wand->arch->clone.face;	961	wand->face = wand->arch->face;
934	wand->speed = 0;	962	wand->set_speed (0);
935	update_ob_speed(wand);
936	}
937	}	963	}
938	/* Success */
939	return 1;
940	}	964	}
		965	/* Success */
		966	return 1;
		967	}
941	else if ( wand->type == ROD || wand->type==HORN ) {	968	else if (wand->type == ROD || wand->type == HORN)
		969	{
942	/* Found rod/horn, let's use it if possible */	970	/* Found rod/horn, let's use it if possible */
943	at_least_one = 1;	971	at_least_one = 1;
944	if( wand->stats.hp < MAX( wand->inv->stats.sp, wand->inv->stats.grace ) )	972	if (wand->stats.hp < MAX (wand->inv->stats.sp, wand->inv->stats.grace))
945	continue;	973	continue;
946		974
947	/* drain charge before casting spell - can be a case where the	975	/* drain charge before casting spell - can be a case where the
948	* spell destroys the monster, and rod, so if done after, results	976	* spell destroys the monster, and rod, so if done after, results
949	* in crash.	977	* in crash.
950	*/	978	*/
951	drain_rod_charge( wand );	979	drain_rod_charge (wand);
952	cast_spell( head, wand, dir, wand->inv, NULL );	980	cast_spell (head, wand, dir, wand->inv, NULL);
953		981
954	/* Success */	982	/* Success */
955	return 1;	983	return 1;
956	}	984	}
957	}	985	}
958		986
959	if ( at_least_one )	987	if (at_least_one)
960	return 0;	988	return 0;
961		989
962	LOG(llevError,"Error: Monster %s (%d) HAS_READY_RANG() without wand/horn/rod.\n",	990	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);	991	CLEAR_FLAG (head, FLAG_READY_RANGE);
965	return 0;	992	return 0;
966	}	993	}
967		994
		995	int
968	int monster_use_bow(object *head, object *part, object *pl, int dir) {	996	monster_use_bow (object *head, object *part, object *pl, int dir)
		997	{
969	object *owner;	998	object *owner;
970		999
971	if(!(dir=path_to_player(part,pl,0)))	1000	if (!(dir = path_to_player (part, pl, 0)))
972	return 0;	1001	return 0;
		1002
973	if(QUERY_FLAG(head,FLAG_CONFUSED))	1003	if (QUERY_FLAG (head, FLAG_CONFUSED))
974	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	1004	dir = absdir (dir + rndm (3) + rndm (3) - 2);
975		1005
976	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	1006	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
		1007	{
977	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	1008	int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
		1009
978	if(dirdiff(dir,dir2) < 1)	1010	if (dirdiff (dir, dir2) < 1)
979	return 0; /* Might hit owner with arrow */	1011	return 0; /* Might hit owner with arrow */
980	}	1012	}
981		1013
982	/* in server/player.c */	1014	/* in server/player.c */
983	return fire_bow(head, part, NULL, dir, 0, part->x, part->y);	1015	return fire_bow (head, part, NULL, dir, 0, part->x, part->y);
984		1016
985	}	1017	}
986		1018
987	/* Checks if putting on 'item' will make 'who' do more	1019	/* Checks if putting on 'item' will make 'who' do more
988	* damage. This is a very simplistic check - also checking things	1020	* damage. This is a very simplistic check - also checking things
989	* like speed and ac are also relevant.	1021	* like speed and ac are also relevant.
990	*	1022	*
991	* return true if item is a better object.	1023	* return true if item is a better object.
992	*/	1024	*/
993		1025	int
994	int check_good_weapon(object *who, object *item) {	1026	check_good_weapon (object *who, object *item)
		1027	{
995	object *other_weap;	1028	object *other_weap;
996	int val=0, i;	1029	int val = 0, i;
997		1030
998	for(other_weap=who->inv;other_weap!=NULL;other_weap=other_weap->below)	1031	for (other_weap = who->inv; other_weap; other_weap = other_weap->below)
999	if(other_weap->type==item->type&&QUERY_FLAG(other_weap,FLAG_APPLIED))	1032	if (other_weap->type == item->type && QUERY_FLAG (other_weap, FLAG_APPLIED))
1000	break;	1033	break;
1001		1034
1002	if(other_weap==NULL) /* No other weapons */	1035	if (!other_weap) /* No other weapons */
1003	return 1;	1036	return 1;
1004		1037
1005	/* Rather than go through and apply the new one, and see if it is	1038	/* Rather than go through and apply the new one, and see if it is
1006	* better, just do some simple checks	1039	* better, just do some simple checks
1007	* Put some multipliers for things that hvae several effects,	1040	* Put some multipliers for things that hvae several effects,
1008	* eg, magic affects both damage and wc, so it has more weight	1041	* eg, magic affects both damage and wc, so it has more weight
1009	*/	1042	*/
1010		1043
1011	val = item->stats.dam - other_weap->stats.dam;	1044	val = item->stats.dam - other_weap->stats.dam;
1012	val += (item->magic - other_weap->magic) * 3;	1045	val += (item->magic - other_weap->magic) * 3;
1013	/* Monsters don't really get benefits from things like regen rates	1046	/* Monsters don't really get benefits from things like regen rates
1014	* from items. But the bonus for their stats are very important.	1047	* from items. But the bonus for their stats are very important.
1015	*/	1048	*/
1016	for (i=0; i<NUM_STATS; i++)	1049	for (i = 0; i < NUM_STATS; i++)
1017	val += (get_attr_value(&item->stats, i) - get_attr_value(&other_weap->stats, i))*2;	1050	val += item->stats.stat (i) - other_weap->stats.stat (i) * 2;
1018		1051
1019	if (val > 0) return 1;	1052	if (val > 0)
		1053	return 1;
		1054	else
1020	else return 0;	1055	return 0;
1021
1022	}	1056	}
1023		1057
		1058	int
1024	int check_good_armour(object *who, object *item) {	1059	check_good_armour (object *who, object *item)
		1060	{
1025	object *other_armour;	1061	object *other_armour;
1026	int val=0,i;	1062	int val = 0, i;
1027		1063
1028	for (other_armour = who->inv; other_armour != NULL;	1064	for (other_armour = who->inv; other_armour; other_armour = other_armour->below)
1029	other_armour = other_armour->below)
1030	if (other_armour->type == item->type && QUERY_FLAG(other_armour,FLAG_APPLIED))	1065	if (other_armour->type == item->type && QUERY_FLAG (other_armour, FLAG_APPLIED))
1031	break;	1066	break;
1032		1067
1033	if (other_armour == NULL) /* No other armour, use the new */	1068	if (other_armour == NULL) /* No other armour, use the new */
1034	return 1;	1069	return 1;
1035		1070
1036	/* Like above function , see which is better */	1071	/* Like above function , see which is better */
1037	val = item->stats.ac - other_armour->stats.ac;	1072	val = item->stats.ac - other_armour->stats.ac;
1038	val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL])/5;	1073	val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL]) / 5;
1039	val += (item->magic - other_armour->magic) * 3;	1074	val += (item->magic - other_armour->magic) * 3;
1040		1075
1041	/* for the other protections, do weigh them very much in the equation -	1076	/* 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	1077	* 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.	1078	* 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	1079	* 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.	1080	* value. If the reverse, then decrease the value of this item some.
1046	*/	1081	*/
1047	for (i=1; i <NROFATTACKS; i++) {	1082	for (i = 1; i < NROFATTACKS; i++)
		1083	{
1048	if (item->resist[i] > other_armour->resist[i]) val++;	1084	if (item->resist[i] > other_armour->resist[i])
		1085	val++;
1049	else if (item->resist[i] < other_armour->resist[i]) val--;	1086	else if (item->resist[i] < other_armour->resist[i])
		1087	val--;
1050	}	1088	}
1051		1089
1052	/* Very few armours have stats, so not much need to worry about those. */	1090	/* Very few armours have stats, so not much need to worry about those. */
1053		1091
1054	if (val > 0) return 1;	1092	if (val > 0)
		1093	return 1;
		1094	else
1055	else return 0;	1095	return 0;
1056
1057	}	1096	}
1058		1097
1059	/*	1098	/*
1060	* monster_check_pickup(): checks for items that monster can pick up.	1099	* monster_check_pickup(): checks for items that monster can pick up.
1061	*	1100	*
…		…
1069	* This function was seen be continueing looping at one point (tmp->below	1108	* 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	1109	* 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	1110	* after we pick everything up, since that function may call others which
1072	* affect stacking on this space.	1111	* affect stacking on this space.
1073	*/	1112	*/
1074		1113	void
1075	void monster_check_pickup(object *monster) {	1114	monster_check_pickup (object *monster)
		1115	{
1076	object *tmp,*next;	1116	object *tmp, *next;
1077	int next_tag;
1078		1117
1079	for(tmp=monster->below;tmp!=NULL;tmp=next) {	1118	for (tmp = monster->below; tmp != NULL; tmp = next)
		1119	{
1080	next=tmp->below;	1120	next = tmp->below;
1081	next_tag = next ? next->count : 0;
1082	if (monster_can_pick(monster,tmp)) {	1121	if (monster_can_pick (monster, tmp))
1083	remove_ob(tmp);	1122	{
		1123	tmp->remove ();
1084	tmp = insert_ob_in_ob(tmp,monster);	1124	tmp = insert_ob_in_ob (tmp, monster);
1085	(void) monster_check_apply(monster,tmp);	1125	(void) monster_check_apply (monster, tmp);
1086	}	1126	}
1087	/* We could try to re-establish the cycling, of the space, but probably	1127	/* We could try to re-establish the cycling, of the space, but probably
1088	* not a big deal to just bail out.	1128	* not a big deal to just bail out.
1089	*/	1129	*/
1090	if (next && was_destroyed(next, next_tag)) return;	1130	if (next && next->destroyed ())
		1131	return;
1091	}	1132	}
1092	}	1133	}
1093		1134
1094	/*	1135	/*
1095	* monster_can_pick(): If the monster is interested in picking up	1136	* monster_can_pick(): If the monster is interested in picking up
1096	* the item, then return 0. Otherwise 0.	1137	* the item, then return 0. Otherwise 0.
1097	* Instead of pick_up, flags for "greed", etc, should be used.	1138	* Instead of pick_up, flags for "greed", etc, should be used.
1098	* I've already utilized flags for bows, wands, rings, etc, etc. -Frank.	1139	* I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
1099	*/	1140	*/
1100		1141	int
1101	int monster_can_pick(object *monster, object *item) {	1142	monster_can_pick (object *monster, object *item)
		1143	{
1102	int flag=0;	1144	int flag = 0;
1103	int i;	1145	int i;
1104		1146
1105	if(!can_pick(monster,item))	1147	if (!can_pick (monster, item))
1106	return 0;	1148	return 0;
1107		1149
1108	if(QUERY_FLAG(item,FLAG_UNPAID))	1150	if (QUERY_FLAG (item, FLAG_UNPAID))
1109	return 0;	1151	return 0;
1110		1152
1111	if (monster->pick_up&64) /* All */	1153	if (monster->pick_up & 64) /* All */
1112	flag=1;	1154	flag = 1;
1113		1155
		1156	else
1114	else switch(item->type) {	1157	switch (item->type)
		1158	{
1115	case MONEY:	1159	case MONEY:
1116	case GEM:	1160	case GEM:
1117	flag=monster->pick_up&2;	1161	flag = monster->pick_up & 2;
1118	break;	1162	break;
1119		1163
1120	case FOOD:	1164	case FOOD:
1121	flag=monster->pick_up&4;	1165	flag = monster->pick_up & 4;
1122	break;	1166	break;
1123		1167
1124	case WEAPON:	1168	case WEAPON:
1125	flag=(monster->pick_up&8)||QUERY_FLAG(monster,FLAG_USE_WEAPON);	1169	flag = (monster->pick_up & 8) || QUERY_FLAG (monster, FLAG_USE_WEAPON);
1126	break;	1170	break;
1127		1171
1128	case ARMOUR:	1172	case ARMOUR:
1129	case SHIELD:	1173	case SHIELD:
1130	case HELMET:	1174	case HELMET:
1131	case BOOTS:	1175	case BOOTS:
1132	case GLOVES:	1176	case GLOVES:
1133	case GIRDLE:	1177	case GIRDLE:
1134	flag=(monster->pick_up&16)||QUERY_FLAG(monster,FLAG_USE_ARMOUR);	1178	flag = (monster->pick_up & 16) || QUERY_FLAG (monster, FLAG_USE_ARMOUR);
1135	break;	1179	break;
1136		1180
1137	case SKILL:	1181	case SKILL:
1138	flag=QUERY_FLAG(monster,FLAG_CAN_USE_SKILL);	1182	flag = QUERY_FLAG (monster, FLAG_CAN_USE_SKILL);
1139	break;	1183	break;
1140		1184
1141	case RING:	1185	case RING:
1142	flag=QUERY_FLAG(monster,FLAG_USE_RING);	1186	flag = QUERY_FLAG (monster, FLAG_USE_RING);
1143	break;	1187	break;
1144		1188
1145	case WAND:	1189	case WAND:
1146	case HORN:	1190	case HORN:
1147	case ROD:	1191	case ROD:
1148	flag=QUERY_FLAG(monster,FLAG_USE_RANGE);	1192	flag = QUERY_FLAG (monster, FLAG_USE_RANGE);
1149	break;	1193	break;
1150		1194
1151	case SPELLBOOK:	1195	case SPELLBOOK:
1152	flag=(monster->arch!=NULL&&QUERY_FLAG((&monster->arch->clone),FLAG_CAST_SPELL));	1196	flag = monster->arch && QUERY_FLAG (monster->arch, FLAG_CAST_SPELL);
1153	break;	1197	break;
1154		1198
1155	case SCROLL:	1199	case SCROLL:
1156	flag = QUERY_FLAG(monster,FLAG_USE_SCROLL);	1200	flag = QUERY_FLAG (monster, FLAG_USE_SCROLL);
1157	break;	1201	break;
1158		1202
1159	case BOW:	1203	case BOW:
1160	case ARROW:	1204	case ARROW:
1161	flag=QUERY_FLAG(monster,FLAG_USE_BOW);	1205	flag = QUERY_FLAG (monster, FLAG_USE_BOW);
1162	break;	1206	break;
1163	}	1207	}
		1208
1164	/* Simplistic check - if the monster has a location to equip it, he will	1209	/* 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	1210	* pick it up. Note that this doesn't handle cases where an item may
1166	* use several locations.	1211	* use several locations.
1167	*/	1212	*/
1168	for (i=0; i < NUM_BODY_LOCATIONS; i++) {	1213	for (i = 0; i < NUM_BODY_LOCATIONS; i++)
1169	if (monster->body_info[i] && item->body_info[i]) {	1214	{
		1215	if (monster->slot[i].info && item->slot[i].info)
		1216	{
1170	flag=1;	1217	flag = 1;
1171	break;	1218	break;
1172	}	1219	}
1173	}	1220	}
1174		1221
1175	if (((!(monster->pick_up&32))&&flag) || ((monster->pick_up&32)&&(!flag)))	1222	if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
1176	return 1;
1177	return 0;	1223	return 1;
		1224
		1225	return 0;
1178	}	1226	}
1179		1227
1180	/*	1228	/*
1181	* monster_apply_below():	1229	* monster_apply_below():
1182	* Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's	1230	* Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
1183	* eager to apply things, encounters something apply-able,	1231	* eager to apply things, encounters something apply-able,
1184	* then make him apply it	1232	* then make him apply it
1185	*/	1233	*/
1186		1234	void
1187	void monster_apply_below(object *monster) {	1235	monster_apply_below (object *monster)
		1236	{
1188	object *tmp, *next;	1237	object *tmp, *next;
1189		1238
1190	for(tmp=monster->below;tmp!=NULL;tmp=next) {	1239	for (tmp = monster->below; tmp != NULL; tmp = next)
		1240	{
1191	next=tmp->below;	1241	next = tmp->below;
1192	switch (tmp->type) {	1242	switch (tmp->type)
		1243	{
1193	case CF_HANDLE:	1244	case CF_HANDLE:
1194	case TRIGGER:	1245	case TRIGGER:
1195	if (monster->will_apply&1)	1246	if (monster->will_apply & 1)
1196	manual_apply(monster,tmp,0);	1247	manual_apply (monster, tmp, 0);
1197	break;	1248	break;
1198		1249
1199	case TREASURE:	1250	case TREASURE:
1200	if (monster->will_apply&2)	1251	if (monster->will_apply & 2)
1201	manual_apply(monster,tmp,0);	1252	manual_apply (monster, tmp, 0);
1202	break;	1253	break;
1203		1254
1204	}	1255	}
1205	if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))	1256	if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
1206	break;	1257	break;
1207	}	1258	}
1208	}	1259	}
1209		1260
1210	/*	1261	/*
1211	* monster_check_apply() is meant to be called after an item is	1262	* monster_check_apply() is meant to be called after an item is
…		…
1214	* a pointer to that object is returned, so it can be dropped.	1265	* a pointer to that object is returned, so it can be dropped.
1215	* (so that other monsters can pick it up and use it)	1266	* (so that other monsters can pick it up and use it)
1216	* Note that as things are now, monsters never drop something -	1267	* Note that as things are now, monsters never drop something -
1217	* they can pick up all that they can use.	1268	* they can pick up all that they can use.
1218	*/	1269	*/
1219
1220	/* Sept 96, fixed this so skills will be readied -b.t.*/	1270	/* Sept 96, fixed this so skills will be readied -b.t.*/
1221		1271	void
1222	void monster_check_apply(object *mon, object *item) {	1272	monster_check_apply (object *mon, object *item)
1223		1273	{
1224	int flag = 0;	1274	int flag = 0;
1225		1275
1226	if(item->type==SPELLBOOK&&	1276	if (item->type == SPELLBOOK && mon->arch && (QUERY_FLAG (mon->arch, FLAG_CAST_SPELL)))
1227	mon->arch!=NULL&&(QUERY_FLAG((&mon->arch->clone),FLAG_CAST_SPELL))) {	1277	{
1228	SET_FLAG(mon, FLAG_CAST_SPELL);	1278	SET_FLAG (mon, FLAG_CAST_SPELL);
1229	return;	1279	return;
1230	}	1280	}
1231		1281
1232	/* If for some reason, this item is already applied, no more work to do */	1282	/* If for some reason, this item is already applied, no more work to do */
1233	if(QUERY_FLAG(item,FLAG_APPLIED)) return;	1283	if (QUERY_FLAG (item, FLAG_APPLIED))
1234
1235	/* Might be better not to do this - if the monster can fire a bow,
1236	* it is possible in his wanderings, he will find one to use. In
1237	* which case, it would be nice to have ammo for it.
1238	*/
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;
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;	1284	return;
1318	}
1319		1285
		1286	/* Might be better not to do this - if the monster can fire a bow,
		1287	* it is possible in his wanderings, he will find one to use. In
		1288	* which case, it would be nice to have ammo for it.
		1289	*/
		1290	if (QUERY_FLAG (mon, FLAG_USE_BOW) && item->type == ARROW)
		1291	{
		1292	/* Check for the right kind of bow */
		1293	object *bow;
		1294
		1295	for (bow = mon->inv; bow; bow = bow->below)
		1296	if (bow->type == BOW && bow->race == item->race)
		1297	{
		1298	SET_FLAG (mon, FLAG_READY_BOW);
		1299	LOG (llevMonster, "Found correct bow for arrows.\n");
		1300	return; /* nothing more to do for arrows */
		1301	}
		1302	}
		1303
		1304	if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE)
		1305	flag = 1;
		1306	/* Eating food gets hp back */
		1307	else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD)
		1308	flag = 1;
		1309	else if (item->type == SCROLL && QUERY_FLAG (mon, FLAG_USE_SCROLL))
		1310	{
		1311	if (!item->inv)
		1312	LOG (llevDebug, "Monster %d having scroll %d with empty inventory!", mon->count, item->count);
		1313	else if (monster_should_cast_spell (mon, item->inv))
		1314	SET_FLAG (mon, FLAG_READY_SCROLL);
		1315	/* Don't use it right now */
		1316	return;
		1317	}
		1318	else if (item->type == WEAPON)
		1319	flag = check_good_weapon (mon, item);
		1320	else if (item->is_armor ())
		1321	flag = check_good_armour (mon, item);
		1322	/* Should do something more, like make sure this is a better item */
		1323	else if (item->type == RING)
		1324	flag = 1;
		1325	else if (item->type == WAND || item->type == ROD || item->type == HORN)
		1326	{
		1327	/* We never really 'ready' the wand/rod/horn, because that would mean the
		1328	* weapon would get undone.
		1329	*/
		1330	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
		1331	{
		1332	SET_FLAG (mon, FLAG_READY_RANGE);
		1333	SET_FLAG (item, FLAG_APPLIED);
		1334	}
		1335	return;
		1336	}
		1337	else if (item->type == BOW)
		1338	{
		1339	/* We never really 'ready' the bow, because that would mean the
		1340	* weapon would get undone.
		1341	*/
		1342	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
		1343	SET_FLAG (mon, FLAG_READY_BOW);
		1344	return;
		1345	}
		1346	else if (item->type == SKILL)
		1347	{
		1348	/*
		1349	* skills are specials: monsters must have the 'FLAG_READY_SKILL' flag set,
		1350	* else they can't use the skill...
		1351	* Skills also don't need to get applied, so return now.
		1352	*/
		1353	SET_FLAG (mon, FLAG_READY_SKILL);
		1354	return;
		1355	}
		1356
		1357	/* if we don't match one of the above types, return now.
		1358	* can_apply_object will say that we can apply things like flesh,
		1359	* bolts, and whatever else, because it only checks against the
		1360	* body_info locations.
		1361	*/
		1362	if (!flag)
		1363	return;
		1364
		1365	/* Check to see if the monster can use this item. If not, no need
		1366	* to do further processing. Note that can_apply_object already checks
		1367	* for the CAN_USE flags.
		1368	*/
		1369	if (can_apply_object (mon, item) & CAN_APPLY_NOT_MASK)
		1370	return;
		1371
		1372	/* should only be applying this item, not unapplying it.
		1373	* also, ignore status of curse so they can take off old armour.
		1374	* monsters have some advantages after all.
		1375	*/
		1376	manual_apply (mon, item, AP_APPLY | AP_IGNORE_CURSE);
		1377	}
		1378
		1379	void
1320	void npc_call_help(object *op) {	1380	npc_call_help (object *op)
		1381	{
1321	int x,y, mflags;	1382	int x, y, mflags;
1322	object *npc;	1383	object *npc;
1323	sint16 sx, sy;	1384	sint16 sx, sy;
1324	mapstruct *m;	1385	maptile *m;
1325		1386
1326	for(x = -3; x < 4; x++)	1387	for (x = -3; x < 4; x++)
1327	for(y = -3; y < 4; y++) {	1388	for (y = -3; y < 4; y++)
		1389	{
1328	m = op->map;	1390	m = op->map;
1329	sx = op->x + x;	1391	sx = op->x + x;
1330	sy = op->y + y;	1392	sy = op->y + y;
1331	mflags = get_map_flags(m, &m, sx, sy, &sx, &sy);	1393	mflags = get_map_flags (m, &m, sx, sy, &sx, &sy);
1332	/* If nothing alive on this space, no need to search the space. */	1394	/* If nothing alive on this space, no need to search the space. */
1333	if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))	1395	if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))
1334	continue;	1396	continue;
1335		1397
1336	for(npc = get_map_ob(m,sx,sy);npc!=NULL;npc=npc->above)	1398	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))	1399	if (QUERY_FLAG (npc, FLAG_ALIVE) && QUERY_FLAG (npc, FLAG_UNAGGRESSIVE))
1338	npc->enemy = op->enemy;	1400	npc->enemy = op->enemy;
1339	}	1401	}
1340	}	1402	}
1341		1403
1342		1404	int
1343	int dist_att (int dir , object *ob, object *enemy, object *part, rv_vector *rv) {	1405	dist_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1344		1406	{
1345	if (can_hit(part,enemy,rv))	1407	if (can_hit (part, enemy, rv))
1346	return dir;	1408	return dir;
		1409
1347	if (rv->distance < 10)	1410	if (rv->distance < 10)
1348	return absdir(dir+4);	1411	return absdir (dir + 4);
1349	else if (rv->distance>18)	1412	else if (rv->distance > 18)
1350	return dir;	1413	return dir;
		1414
1351	return 0;	1415	return 0;
1352	}	1416	}
1353		1417
		1418	int
1354	int run_att (int dir, object *ob, object *enemy,object *part, rv_vector *rv) {	1419	run_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1355		1420	{
1356	if ((can_hit (part,enemy,rv) && ob->move_status <20) || ob->move_status <20) {	1421	if ((can_hit (part, enemy, rv) && ob->move_status < 20) || ob->move_status < 20)
		1422	{
1357	ob->move_status++;	1423	ob->move_status++;
1358	return (dir);	1424	return (dir);
1359	}	1425	}
1360	else if (ob->move_status >20)	1426	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
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;	1427	ob->move_status = 0;
		1428
		1429	return absdir (dir + 4);
		1430	}
		1431
		1432	int
		1433	hitrun_att (int dir, object *ob, object *enemy)
		1434	{
		1435	if (ob->move_status++ < 25)
1389	return 0;	1436	return dir;
1390	}	1437	else if (ob->move_status < 50)
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);	1438	return absdir (dir + 4);
1409	return 0;	1439	else
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;	1440	ob->move_status = 0;
1416	if (!(move_object(ob,circle[ob->move_status])))
1417	(void) move_object(ob,RANDOM()%8+1);
1418	}
1419		1441
		1442	return absdir (dir + 4);
		1443	}
		1444
		1445	int
		1446	wait_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		1447	{
		1448
		1449	int inrange = can_hit (part, enemy, rv);
		1450
		1451	if (ob->move_status || inrange)
		1452	ob->move_status++;
		1453
		1454	if (ob->move_status == 0)
		1455	return 0;
		1456	else if (ob->move_status < 10)
		1457	return dir;
		1458	else if (ob->move_status < 15)
		1459	return absdir (dir + 4);
		1460
		1461	ob->move_status = 0;
		1462	return 0;
		1463	}
		1464
		1465	int
		1466	disthit_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		1467	{
		1468
		1469	/* The logic below here looked plain wrong before. Basically, what should
		1470	* happen is that if the creatures hp percentage falls below run_away,
		1471	* the creature should run away (dir+4)
		1472	* I think its wrong for a creature to have a zero maxhp value, but
		1473	* at least one map has this set, and whatever the map contains, the
		1474	* server should try to be resilant enough to avoid the problem
		1475	*/
		1476	if (ob->stats.maxhp && (ob->stats.hp * 100) / ob->stats.maxhp < ob->run_away)
		1477	return absdir (dir + 4);
		1478
		1479	return dist_att (dir, ob, enemy, part, rv);
		1480	}
		1481
		1482	int
		1483	wait_att2 (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		1484	{
		1485	if (rv->distance < 9)
		1486	return absdir (dir + 4);
		1487
		1488	return 0;
		1489	}
		1490
		1491	void
1420	void circ2_move (object *ob) {	1492	circ1_move (object *ob)
		1493	{
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};	1494	static int circle[12] = { 3, 3, 4, 5, 5, 6, 7, 7, 8, 1, 1, 2 };
		1495
1422	if(++ob->move_status > 19)	1496	if (++ob->move_status > 11)
1423	ob->move_status = 0;	1497	ob->move_status = 0;
		1498
1424	if(!(move_object(ob,circle[ob->move_status])))	1499	if (!(move_object (ob, circle[ob->move_status])))
1425	(void) move_object(ob,RANDOM()%8+1);	1500	move_object (ob, rndm (8) + 1);
1426	}	1501	}
1427		1502
		1503	void
		1504	circ2_move (object *ob)
		1505	{
		1506	static int circle[20] = { 3, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 1, 1, 1, 2, 2 };
		1507
		1508	if (++ob->move_status > 19)
		1509	ob->move_status = 0;
		1510
		1511	if (!(move_object (ob, circle[ob->move_status])))
		1512	move_object (ob, rndm (8) + 1);
		1513	}
		1514
		1515	void
1428	void pace_movev(object *ob) {	1516	pace_movev (object *ob)
		1517	{
1429	if (ob->move_status++ > 6)	1518	if (ob->move_status++ > 6)
1430	ob->move_status = 0;	1519	ob->move_status = 0;
		1520
1431	if (ob->move_status < 4)	1521	if (ob->move_status < 4)
1432	(void) move_object (ob,5);	1522	move_object (ob, 5);
1433	else	1523	else
1434	(void) move_object(ob,1);	1524	move_object (ob, 1);
1435	}	1525	}
1436		1526
		1527	void
1437	void pace_moveh (object *ob) {	1528	pace_moveh (object *ob)
		1529	{
1438	if (ob->move_status++ > 6)	1530	if (ob->move_status++ > 6)
1439	ob->move_status = 0;	1531	ob->move_status = 0;
		1532
1440	if (ob->move_status < 4)	1533	if (ob->move_status < 4)
1441	(void) move_object(ob,3);	1534	move_object (ob, 3);
1442	else	1535	else
1443	(void) move_object(ob,7);	1536	move_object (ob, 7);
1444	}	1537	}
1445		1538
		1539	void
1446	void pace2_movev (object *ob) {	1540	pace2_movev (object *ob)
		1541	{
1447	if (ob->move_status ++ > 16)	1542	if (ob->move_status++ > 16)
1448	ob->move_status = 0;	1543	ob->move_status = 0;
		1544
1449	if (ob->move_status <6)	1545	if (ob->move_status < 6)
1450	(void) move_object (ob,5);	1546	move_object (ob, 5);
1451	else if (ob->move_status < 8)	1547	else if (ob->move_status < 8)
1452	return;	1548	return;
1453	else if (ob->move_status <13)	1549	else if (ob->move_status < 13)
1454	(void) move_object (ob,1);	1550	move_object (ob, 1);
		1551	else
1455	else return;	1552	return;
1456	}	1553	}
1457		1554
		1555	void
1458	void pace2_moveh (object *ob) {	1556	pace2_moveh (object *ob)
		1557	{
1459	if (ob->move_status ++ > 16)	1558	if (ob->move_status++ > 16)
1460	ob->move_status = 0;	1559	ob->move_status = 0;
		1560
1461	if (ob->move_status <6)	1561	if (ob->move_status < 6)
1462	(void) move_object (ob,3);	1562	move_object (ob, 3);
1463	else if (ob->move_status < 8)	1563	else if (ob->move_status < 8)
1464	return;	1564	return;
1465	else if (ob->move_status <13)	1565	else if (ob->move_status < 13)
1466	(void) move_object (ob,7);	1566	move_object (ob, 7);
		1567	else
1467	else return;	1568	return;
1468	}	1569	}
1469		1570
		1571	void
1470	void rand_move (object *ob) {	1572	rand_move (object *ob)
1471	int i;	1573	{
1472	if (ob->move_status <1 || ob->move_status >8 ||	1574	if (ob->move_status < 1 || ob->move_status > 8 || !(move_object (ob, ob->move_status || !(rndm (9)))))
1473	!(move_object(ob,ob->move_status|| ! (RANDOM()% 9))))
1474	for (i = 0; i < 5; i++)	1575	for (int i = 0; i < 5; i++)
1475	if (move_object(ob,ob->move_status = RANDOM()%8+1))	1576	if (move_object (ob, ob->move_status = rndm (8) + 1))
1476	return;	1577	return;
1477	}	1578	}
1478		1579
		1580	void
1479	void check_earthwalls(object *op, mapstruct *m, int x, int y) {	1581	check_earthwalls (object *op, maptile *m, int x, int y)
1480	object *tmp;	1582	{
1481	for (tmp = get_map_ob(m, x, y); tmp!=NULL; tmp=tmp->above) {	1583	for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1482	if (tmp->type == EARTHWALL) {	1584	if (tmp->type == EARTHWALL)
		1585	{
1483	hit_player(tmp,op->stats.dam,op,AT_PHYSICAL,1);	1586	hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1);
1484	return;	1587	return;
1485	}	1588	}
1486	}
1487	}	1589	}
1488		1590
		1591	void
1489	void check_doors(object *op, mapstruct *m, int x, int y) {	1592	check_doors (object *op, maptile *m, int x, int y)
1490	object *tmp;	1593	{
1491	for (tmp = get_map_ob(m, x, y); tmp!=NULL; tmp=tmp->above) {	1594	for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1492	if (tmp->type == DOOR) {	1595	if (tmp->type == DOOR)
		1596	{
1493	hit_player(tmp,1000,op,AT_PHYSICAL,1);	1597	hit_player (tmp, 1000, op, AT_PHYSICAL, 1);
1494	return;	1598	return;
1495	}	1599	}
1496	}
1497	}	1600	}
1498		1601
1499	/* find_mon_throw_ob() - modeled on find_throw_ob	1602	/* find_mon_throw_ob() - modeled on find_throw_ob
1500	* This is probably overly simplistic as it is now - We want	1603	* This is probably overly simplistic as it is now - We want
1501	* monsters to throw things like chairs and other pieces of	1604	* monsters to throw things like chairs and other pieces of
1502	* furniture, even if they are not good throwable objects.	1605	* furniture, even if they are not good throwable objects.
1503	* Probably better to have the monster throw a throwable object	1606	* Probably better to have the monster throw a throwable object
1504	* first, then throw any non equipped weapon.	1607	* first, then throw any non equipped weapon.
1505	*/	1608	*/
1506		1609	object *
1507	object *find_mon_throw_ob( object *op ) {	1610	find_mon_throw_ob (object *op)
		1611	{
1508	object *tmp = NULL;	1612	object *tmp = NULL;
1509
1510	if(op->head) tmp=op->head; else tmp=op;
1511		1613
		1614	if (op->head)
		1615	tmp = op->head;
		1616	else
		1617	tmp = op;
		1618
1512	/* New throw code: look through the inventory. Grap the first legal is_thrown	1619	/* New throw code: look through the inventory. Grap the first legal is_thrown
1513	* marked item and throw it to the enemy.	1620	* marked item and throw it to the enemy.
1514	*/	1621	*/
1515
1516	for(tmp=op->inv;tmp;tmp=tmp->below) {	1622	for (tmp = op->inv; tmp; tmp = tmp->below)
1517		1623	{
1518	/* Can't throw invisible objects or items that are applied */	1624	/* Can't throw invisible objects or items that are applied */
1519	if(tmp->invisible || QUERY_FLAG(tmp,FLAG_APPLIED)) continue;	1625	if (tmp->invisible || QUERY_FLAG (tmp, FLAG_APPLIED))
		1626	continue;
1520		1627
1521	if(QUERY_FLAG(tmp,FLAG_IS_THROWN))	1628	if (QUERY_FLAG (tmp, FLAG_IS_THROWN))
1522	break;	1629	break;
1523		1630
1524	}	1631	}
1525		1632
1526	#ifdef DEBUG_THROW	1633	#ifdef DEBUG_THROW
1527	LOG(llevDebug,"%s chooses to throw: %s (%d)\n",op->name,	1634	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	1635	#endif
1530		1636
1531	return tmp;	1637	return tmp;
1532	}	1638	}
1533		1639
1534	/* determine if we can 'detect' the enemy. Check for walls blocking the	1640	/* 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	1641	* 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.	1642	* 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	1644	* 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	1645	* OR y distance being within some range - that seemed wrong - both should
1540	* be within the valid range. MSW 2001-08-05	1646	* be within the valid range. MSW 2001-08-05
1541	* Returns 0 if enemy can not be detected, 1 if it is detected	1647	* Returns 0 if enemy can not be detected, 1 if it is detected
1542	*/	1648	*/
1543		1649	int
1544	int can_detect_enemy (object *op, object *enemy, rv_vector *rv) {	1650	can_detect_enemy (object *op, object *enemy, rv_vector * rv)
		1651	{
1545	int radius = MIN_MON_RADIUS, hide_discovery;	1652	int radius = MIN_MON_RADIUS, hide_discovery;
1546		1653
1547	/* null detection for any of these condtions always */	1654	/* null detection for any of these condtions always */
1548	if(!op || !enemy || !op->map || !enemy->map)	1655	if (!op || !enemy || !op->map || !enemy->map)
1549	return 0;	1656	return 0;
1550		1657
1551	/* If the monster (op) has no way to get to the enemy, do nothing */	1658	/* If the monster (op) has no way to get to the enemy, do nothing */
1552	if (!on_same_map(op, enemy))	1659	if (!on_same_map (op, enemy))
1553	return 0;	1660	return 0;
1554		1661
1555	get_rangevector(op, enemy, rv, 0);	1662	get_rangevector (op, enemy, rv, 0);
1556		1663
1557	/* Monsters always ignore the DM */	1664	/* Monsters always ignore the DM */
1558	if ( ( op->type != PLAYER ) && QUERY_FLAG( enemy, FLAG_WIZ ) )	1665	if (op->type != PLAYER && QUERY_FLAG (enemy, FLAG_WIZ))
1559	return 0;	1666	return 0;
1560		1667
1561	/* simple check. Should probably put some range checks in here. */	1668	/* simple check. Should probably put some range checks in here. */
1562	if(can_see_enemy(op,enemy)) return 1;	1669	if (can_see_enemy (op, enemy))
		1670	return 1;
1563		1671
1564	/* The rest of this is for monsters. Players are on their own for	1672	/* The rest of this is for monsters. Players are on their own for
1565	* finding enemies!	1673	* finding enemies!
1566	*/	1674	*/
1567	if(op->type==PLAYER) return 0;	1675	if (op->type == PLAYER)
		1676	return 0;
1568		1677
1569	/* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE	1678	/* 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	1679	* flag (which was already checked) in can_see_enmy (). Lets get out of here
1571	*/	1680	*/
1572	if(enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden)))	1681	if (enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden)))
1573	return 0;	1682	return 0;
1574		1683
1575	/* use this for invis also */	1684	/* use this for invis also */
1576	hide_discovery = op->stats.Int/5;	1685	hide_discovery = op->stats.Int / 5;
1577		1686
1578	/* Determine Detection radii */	1687	/* Determine Detection radii */
1579	if(!enemy->hide) /* to detect non-hidden (eg dark/invis enemy) */	1688	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;	1689	radius = max (MIN_MON_RADIUS, op->stats.Wis / 5 + 1);
		1690	else
1581	else { /* a level/INT/Dex adjustment for hiding */	1691	{ /* a level/INT/Dex adjustment for hiding */
1582	object *sk_hide;
1583	int bonus = (op->level/2) + (op->stats.Int/5);	1692	int bonus = op->level / 2 + op->stats.Int / 5;
1584		1693
1585	if(enemy->type==PLAYER) {	1694	if (enemy->type == PLAYER)
		1695	{
1586	if((sk_hide = find_skill_by_number(enemy,SK_HIDING)))	1696	if (object *sk_hide = find_skill_by_number (enemy, SK_HIDING))
1587	bonus -= sk_hide->level;	1697	bonus -= sk_hide->level;
1588	else {	1698	else
		1699	{
1589	LOG(llevError,"can_detect_enemy() got hidden player w/o hiding skill!\n");	1700	LOG (llevError, "can_detect_enemy() got hidden player w/o hiding skill!\n");
1590	make_visible(enemy);	1701	make_visible (enemy);
1591	radius=radius<MIN_MON_RADIUS?MIN_MON_RADIUS:radius;	1702	radius = radius < MIN_MON_RADIUS ? MIN_MON_RADIUS : radius;
1592	}	1703	}
1593	}	1704	}
1594	else /* enemy is not a player */	1705	else /* enemy is not a player */
1595	bonus -= enemy->level;	1706	bonus -= enemy->level;
1596		1707
1597	radius += bonus/5;	1708	radius += bonus / 5;
1598	hide_discovery += bonus*5;	1709	hide_discovery += bonus * 5;
1599	} /* else creature has modifiers for hiding */	1710	} /* else creature has modifiers for hiding */
1600		1711
1601	/* Radii stealth adjustment. Only if you are stealthy	1712	/* Radii stealth adjustment. Only if you are stealthy
1602	* will you be able to sneak up closer to creatures */	1713	* will you be able to sneak up closer to creatures */
1603	if(QUERY_FLAG(enemy,FLAG_STEALTH))	1714	if (QUERY_FLAG (enemy, FLAG_STEALTH))
1604	radius = radius/2, hide_discovery = hide_discovery/3;	1715	{
		1716	radius /= 2;
		1717	hide_discovery /= 3;
		1718	}
1605		1719
1606	/* Radii adjustment for enemy standing in the dark */	1720	/* Radii adjustment for enemy standing in the dark */
1607	if(op->map->darkness>0 && !stand_in_light(enemy)) {	1721	if (op->map->darkness > 0 && !stand_in_light (enemy))
		1722	{
1608	/* on dark maps body heat can help indicate location with infravision	1723	/* on dark maps body heat can help indicate location with infravision
1609	* undead don't have body heat, so no benefit detecting them.	1724	* undead don't have body heat, so no benefit detecting them.
1610	*/	1725	*/
1611	if(QUERY_FLAG(op,FLAG_SEE_IN_DARK) && !is_true_undead(enemy))	1726	if (QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !is_true_undead (enemy))
1612	radius += op->map->darkness/2;	1727	radius += op->map->darkness / 2;
1613	else	1728	else
1614	radius -= op->map->darkness/2;	1729	radius -= op->map->darkness / 2;
1615		1730
1616	/* op next to a monster (and not in complete darkness)	1731	/* op next to a monster (and not in complete darkness)
1617	* the monster should have a chance to see you.	1732	* the monster should have a chance to see you.
1618	*/	1733	*/
1619	if(radius<MIN_MON_RADIUS && op->map->darkness<5 && rv->distance<=1)	1734	if (radius < MIN_MON_RADIUS && op->map->darkness < 5 && rv->distance <= 1)
1620	radius = MIN_MON_RADIUS;	1735	radius = MIN_MON_RADIUS;
1621	} /* if on dark map */	1736	} /* if on dark map */
1622		1737
1623	/* Lets not worry about monsters that have incredible detection	1738	/* Lets not worry about monsters that have incredible detection
1624	* radii, we only need to worry here about things the player can	1739	* 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	1740	* (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	1741	* may have for their map - in that way, creatures at the edge will
1627	* do something. Note that the distance field in the	1742	* do something. Note that the distance field in the
1628	* vector is real distance, so in theory this should be 18 to	1743	* vector is real distance, so in theory this should be 18 to
1629	* find that.	1744	* find that.
1630	*/	1745	*/
1631	if(radius>13) radius = 13;	1746	// note that the above reasoning was utter bullshit even at the time it was written
		1747	// we use 25, lets see if we have the cpu time for it
		1748	radius = min (25, radius);
1632		1749
1633	/* Enemy in range! Now test for detection */	1750	/* Enemy in range! Now test for detection */
1634	if ((int) rv->distance <= radius) {	1751	if (rv->distance <= radius)
		1752	{
1635	/* ah, we are within range, detected? take cases */	1753	/* ah, we are within range, detected? take cases */
1636	if(!enemy->invisible) /* enemy in dark squares... are seen! */	1754	if (!enemy->invisible) /* enemy in dark squares... are seen! */
1637	return 1;	1755	return 1;
1638		1756
1639	/* hidden or low-quality invisible */	1757	/* hidden or low-quality invisible */
1640	if(enemy->hide && (rv->distance <= 1) && (RANDOM()%100<=hide_discovery)) {	1758	if (enemy->flag [FLAG_HIDDEN] && rv->distance <= 1 && rndm (100) <= hide_discovery)
		1759	{
1641	make_visible(enemy);	1760	make_visible (enemy);
		1761
1642	/* inform players of new status */	1762	/* inform players of new status */
1643	if(enemy->type==PLAYER && player_can_view(enemy,op))	1763	if (enemy->type == PLAYER && player_can_view (enemy, op))
1644	new_draw_info_format(NDI_UNIQUE,0, enemy,	1764	new_draw_info_format (NDI_UNIQUE, 0, enemy, "You are discovered by %s!", &op->name);
1645	"You are discovered by %s!",&op->name);	1765
1646	return 1; /* detected enemy */	1766	return 1; /* detected enemy */
1647	}	1767	}
1648	else if (enemy->invisible) {	1768	else if (enemy->invisible)
		1769	{
1649	/* Change this around - instead of negating the invisible, just	1770	/* Change this around - instead of negating the invisible, just
1650	* return true so that the mosnter that managed to detect you can	1771	* return true so that the monster that managed to detect you can
1651	* do something to you. Decreasing the duration of invisible	1772	* do something to you. Decreasing the duration of invisible
1652	* doesn't make a lot of sense IMO, as a bunch of stupid creatures	1773	* 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 -	1774	* can then basically negate the spell. The spell isn't negated -
1654	* they just know where you are!	1775	* they just know where you are!
1655	*/	1776	*/
1656	if ((RANDOM() % 50) <= hide_discovery) {	1777	if (rndm (50) <= hide_discovery)
		1778	{
1657	if (enemy->type == PLAYER) {	1779	if (enemy->type == PLAYER)
1658	new_draw_info_format(NDI_UNIQUE,0, enemy,	1780	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));	1781
1660	}
1661	return 1;	1782	return 1;
1662	}	1783	}
1663	}	1784	}
1664	} /* within range */	1785	} /* within range */
1665		1786
1666	/* Wasn't detected above, so still hidden */	1787	/* Wasn't detected above, so still hidden */
1667	return 0;	1788	return 0;
1668	}	1789	}
1669		1790
1670	/* determine if op stands in a lighted square. This is not a very	1791	/* 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	1792	* intellegent algorithm. For one thing, we ignore los here, SO it
1672	* is possible for a bright light to illuminate a player on the	1793	* is possible for a bright light to illuminate a player on the
1673	* other side of a wall (!).	1794	* other side of a wall (!).
1674	*/	1795	*/
1675		1796	int
1676	int stand_in_light( object *op) {	1797	stand_in_light (object *op)
1677	sint16 nx,ny;	1798	{
1678	mapstruct *m;	1799	if (!op)
1679
1680
1681	if(!op) return 0;	1800	return 0;
		1801
1682	if(op->glow_radius > 0) return 1;	1802	if (op->glow_radius > 0)
		1803	return 1;
1683		1804
1684	if(op->map) {	1805	if (op->map)
1685	int x, y, x1, y1;	1806	{
1686
1687
1688
1689	/* Check the spaces with the max light radius to see if any of them	1807	/* 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.	1808	* have lights, and if any of them light the player enough, then return 1.
1691	*/	1809	*/
1692	for (x = op->x - MAX_LIGHT_RADII; x <= op->x + MAX_LIGHT_RADII; x++) {	1810	for (int x = op->x - MAX_LIGHT_RADIUS; x <= op->x + MAX_LIGHT_RADIUS; x++)
		1811	{
1693	for (y = op->y - MAX_LIGHT_RADII; y <= op->y + MAX_LIGHT_RADII; y++) {	1812	for (int y = op->y - MAX_LIGHT_RADIUS; y <= op->y + MAX_LIGHT_RADIUS; y++)
		1813	{
1694	m = op->map;	1814	maptile *m = op->map;
1695	nx = x;	1815	sint16 nx = x;
1696	ny = y;	1816	sint16 ny = y;
1697		1817
1698	if (get_map_flags(m, &m, nx, ny, &nx, &ny) & P_OUT_OF_MAP) continue;	1818	if (xy_normalise (m, nx, ny))
1699		1819	if (idistance (x - op->x, y - op->y) < m->at (nx, ny).light)
1700	x1 = abs(x - op->x)*abs(x - op->x);	1820	return 1;
1701	y1 = abs(y - op->y)*abs(y - op->y);
1702	if (isqrt(x1 + y1) < GET_MAP_LIGHT(m, nx, ny)) return 1;
1703	}	1821	}
1704	}	1822	}
1705	}	1823	}
		1824
1706	return 0;	1825	return 0;
1707	}	1826	}
1708
1709		1827
1710	/* assuming no walls/barriers, lets check to see if its *possible*	1828	/* assuming no walls/barriers, lets check to see if its *possible*
1711	* to see an enemy. Note, "detection" is different from "seeing".	1829	* to see an enemy. Note, "detection" is different from "seeing".
1712	* See can_detect_enemy() for more details. -b.t.	1830	* See can_detect_enemy() for more details. -b.t.
1713	* return 0 if can't be seen, 1 if can be	1831	* return 0 if can't be seen, 1 if can be
1714	*/	1832	*/
1715		1833	int
1716	int can_see_enemy (object *op, object *enemy) {	1834	can_see_enemy (object *op, object *enemy)
		1835	{
1717	object *looker = op->head?op->head:op;	1836	object *looker = op->head ? op->head : op;
1718		1837
1719	/* safety */	1838	/* safety */
1720	if(!looker||!enemy||!QUERY_FLAG(looker,FLAG_ALIVE))	1839	if (!looker || !enemy || !QUERY_FLAG (looker, FLAG_ALIVE))
1721	return 0;	1840	return 0;
1722		1841
1723	/* we dont give a full treatment of xrays here (shorter range than normal,	1842	/* 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	1843	* see through walls). Should we change the code elsewhere to make you
1725	* blind even if you can xray?	1844	* blind even if you can xray?
1726	*/	1845	*/
1727	if(QUERY_FLAG(looker,FLAG_BLIND) && !QUERY_FLAG(looker,FLAG_XRAYS))	1846	if (QUERY_FLAG (looker, FLAG_BLIND) && !QUERY_FLAG (looker, FLAG_XRAYS))
1728	return 0;	1847	return 0;
1729		1848
1730	/* checking for invisible things */	1849	/* checking for invisible things */
1731	if(enemy->invisible) {	1850	if (enemy->invisible)
		1851	{
1732	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!	1852	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!
1733	* However,if you carry any source of light, then the hidden	1853	* However,if you carry any source of light, then the hidden
1734	* creature is seeable (and stupid) */	1854	* creature is seeable (and stupid) */
1735		1855
1736	if(has_carried_lights(enemy)) {	1856	if (has_carried_lights (enemy))
1737	if(enemy->hide) {	1857	{
		1858	if (enemy->flag [FLAG_HIDDEN])
		1859	{
1738	make_visible(enemy);	1860	make_visible (enemy);
1739	new_draw_info(NDI_UNIQUE,0, enemy,	1861	new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!");
1740	"Your light reveals your hiding spot!");
1741	}	1862	}
		1863
1742	return 1;	1864	return 1;
1743	} else if (enemy->hide) return 0;	1865	}
		1866	else if (enemy->flag [FLAG_HIDDEN])
		1867	return 0;
1744		1868
1745	/* Invisible enemy. Break apart the check for invis undead/invis looker	1869	/* 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,	1870	* into more simple checks - the QUERY_FLAG doesn't return 1/0 values,
1747	* and making it a conditional makes the code pretty ugly.	1871	* and making it a conditional makes the code pretty ugly.
1748	*/	1872	*/
1749	if (!QUERY_FLAG(looker,FLAG_SEE_INVISIBLE)) {	1873	if (!QUERY_FLAG (looker, FLAG_SEE_INVISIBLE))
1750	if (makes_invisible_to(enemy, looker)) return 0;	1874	if (makes_invisible_to (enemy, looker))
1751	}	1875	return 0;
		1876	}
1752	} else if(looker->type==PLAYER) /* for players, a (possible) shortcut */	1877	else if (looker->type == PLAYER) /* for players, a (possible) shortcut */
1753	if(player_can_view(looker,enemy)) return 1;	1878	if (player_can_view (looker, enemy))
		1879	return 1;
1754		1880
1755	/* ENEMY IN DARK MAP. Without infravision, the enemy is not seen	1881	/* ENEMY IN DARK MAP. Without infravision, the enemy is not seen
1756	* unless they carry a light or stand in light. Darkness doesnt	1882	* unless they carry a light or stand in light. Darkness doesnt
1757	* inhibit the undead per se (but we should give their archs	1883	* inhibit the undead per se (but we should give their archs
1758	* CAN_SEE_IN_DARK, this is just a safety	1884	* CAN_SEE_IN_DARK, this is just a safety
1759	* we care about the enemy maps status, not the looker.	1885	* we care about the enemy maps status, not the looker.
1760	* only relevant for tiled maps, but it is possible that the	1886	* 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	1887	* enemy is on a bright map and the looker on a dark - in that
1762	* case, the looker can still see the enemy	1888	* case, the looker can still see the enemy
1763	*/	1889	*/
1764	if(enemy->map->darkness>0&&!stand_in_light(enemy)	1890	if (enemy->map->darkness > 0 && !stand_in_light (enemy)
1765	&&(!QUERY_FLAG(looker,FLAG_SEE_IN_DARK)||	1891	&& (!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;	1892	return 0;
1768		1893
1769	return 1;	1894	return 1;
1770	}	1895	}
1771		1896

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