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/cvs/deliantra/server/server/monster.C

Comparing deliantra/server/server/monster.C (file contents):
Revision 1.7 by pippijn, Thu Sep 7 10:01:58 2006 UTC vs.
Revision 1.8 by root, Sun Sep 10 15:59:57 2006 UTC

		1
1	/*	2	/*
2	* static char *rcsid_monster_c =	3	* static char *rcsid_monster_c =
3	* "$Id: monster.C,v 1.7 2006/09/07 10:01:58 pippijn Exp $";	4	* "$Id: monster.C,v 1.8 2006/09/10 15:59:57 root Exp $";
4	*/	5	*/
5		6
6	/*	7	/*
7	CrossFire, A Multiplayer game for X-windows	8	CrossFire, A Multiplayer game for X-windows
8		9
…		…
26	The authors can be reached via e-mail at crossfire-devel@real-time.com	27	The authors can be reached via e-mail at crossfire-devel@real-time.com
27	*/	28	*/
28		29
29	#include <global.h>	30	#include <global.h>
30	#ifndef __CEXTRACT__	31	#ifndef __CEXTRACT__
31	#include <sproto.h>	32	# include <sproto.h>
32	#include <spells.h>	33	# include <spells.h>
33	#include <skills.h>	34	# include <skills.h>
34	#endif	35	#endif
35		36
36		37
37	#define MIN_MON_RADIUS 3 /* minimum monster detection radius */	38	#define MIN_MON_RADIUS 3 /* minimum monster detection radius */
38		39
39		40
40	/* checks npc->enemy and returns that enemy if still valid,	41	/* checks npc->enemy and returns that enemy if still valid,
41	* NULL otherwise.	42	* NULL otherwise.
42	* this is map tile aware.	43	* this is map tile aware.
43	* If this returns an enemy, the range vector rv should also be	44	* If this returns an enemy, the range vector rv should also be
44	* set to sane values.	45	* set to sane values.
45	*/	46	*/
		47	object *
46	object *check_enemy(object *npc, rv_vector *rv) {	48	check_enemy (object *npc, rv_vector * rv)
47		49	{
		50
48	/* if this is pet, let him attack the same enemy as his owner	51	/* 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,	52	* TODO: when there is no ower enemy, try to find a target,
50	* which CAN attack the owner. */	53	* which CAN attack the owner. */
51	if ((npc->attack_movement & HI4) == PETMOVE)	54	if ((npc->attack_movement & HI4) == PETMOVE)
52	{	55	{
53	if (npc->owner == NULL)	56	if (npc->owner == NULL)
54	npc->enemy = NULL;	57	npc->enemy = NULL;
55	else if (npc->enemy == NULL)	58	else if (npc->enemy == NULL)
56	npc->enemy = npc->owner->enemy;	59	npc->enemy = npc->owner->enemy;
57	}	60	}
58		61
59	/* periodically, a monster mayu change its target. Also, if the object	62	/* periodically, a monster mayu change its target. Also, if the object
60	* has been destroyed, etc, clear the enemy.	63	* has been destroyed, etc, clear the enemy.
61	* TODO: this should be changed, because it invokes to attack forced or	64	* TODO: this should be changed, because it invokes to attack forced or
62	* attacked monsters to leave the attacker alone, before it is destroyed	65	* attacked monsters to leave the attacker alone, before it is destroyed
63	*/	66	*/
64	/* i had removed the random target leave, this invokes problems with friendly	67	/* 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	68	* objects, getting attacked and defending herself - they don't try to attack
66	* again then but perhaps get attack on and on	69	* 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	70	* If we include a aggravated flag in , we can handle evil vs evil and good vs good
68	* too. */	71	* too. */
69		72
70	if(npc->enemy)	73	if (npc->enemy)
71	{	74	{
72	/* I broke these if's apart to better be able to see what	75	/* I broke these if's apart to better be able to see what
73	* the grouping checks are. Code is the same.	76	* the grouping checks are. Code is the same.
74	*/	77	*/
75	if ( QUERY_FLAG(npc->enemy,FLAG_REMOVED) ||	78	if (QUERY_FLAG (npc->enemy, FLAG_REMOVED) ||
76	QUERY_FLAG(npc->enemy,FLAG_FREED) ||	79	QUERY_FLAG (npc->enemy, FLAG_FREED) ||
77	!on_same_map(npc, npc->enemy) ||	80	!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;	81	npc->enemy = NULL;
82		82
83	else if (QUERY_FLAG(npc, FLAG_FRIENDLY) && (	83	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))) ||	84	&& !(should_arena_attack (npc, npc->owner, npc->enemy)))
85	((npc->enemy->type == PLAYER) && !(should_arena_attack(npc, npc->owner, npc->enemy)))	85	|| ((npc->enemy->type == PLAYER) && !(should_arena_attack (npc, npc->owner, npc->enemy)))
86	|| npc->enemy == npc->owner))	86	|| npc->enemy == npc->owner))
87	npc->enemy = NULL;	87	npc->enemy = NULL;
88		88
89		89
90	else if (!QUERY_FLAG(npc, FLAG_FRIENDLY) &&	90	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;	91	npc->enemy = NULL;
93		92
94	/* I've noticed that pets could sometimes get an arrow as the	93	/* I've noticed that pets could sometimes get an arrow as the
95	* target enemy - this code below makes sure the enemy is something	94	* target enemy - this code below makes sure the enemy is something
96	* that should be attacked. My guess is that the arrow hits	95	* that should be attacked. My guess is that the arrow hits
97	* the creature/owner, and so the creature then takes that	96	* the creature/owner, and so the creature then takes that
98	* as the enemy to attack.	97	* as the enemy to attack.
99	*/	98	*/
100	else if (!QUERY_FLAG(npc->enemy, FLAG_MONSTER) &&	99	else if (!QUERY_FLAG (npc->enemy, FLAG_MONSTER) &&
101	!QUERY_FLAG(npc->enemy,FLAG_GENERATOR) &&
102	npc->enemy->type!=PLAYER && npc->enemy->type != GOLEM)	100	!QUERY_FLAG (npc->enemy, FLAG_GENERATOR) && npc->enemy->type != PLAYER && npc->enemy->type != GOLEM)
103	npc->enemy=NULL;	101	npc->enemy = NULL;
104		102
105	}	103	}
106	return can_detect_enemy(npc,npc->enemy,rv)?npc->enemy:NULL;	104	return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : NULL;
107	}	105	}
108		106
109	/* Returns the nearest living creature (monster or generator).	107	/* Returns the nearest living creature (monster or generator).
110	* Modified to deal with tiled maps properly.	108	* Modified to deal with tiled maps properly.
111	* Also fixed logic so that monsters in the lower directions were more	109	* Also fixed logic so that monsters in the lower directions were more
…		…
118	* the first few directions, it could very well choose something	116	* the first few directions, it could very well choose something
119	* 3 spaces away even though something directly north is closer.	117	* 3 spaces away even though something directly north is closer.
120	*	118	*
121	* this function is map tile aware.	119	* this function is map tile aware.
122	*/	120	*/
		121	object *
123	object *find_nearest_living_creature(object *npc) {	122	find_nearest_living_creature (object *npc)
		123	{
124	int i,mflags;	124	int i, mflags;
125	sint16 nx,ny;	125	sint16 nx, ny;
126	mapstruct *m;	126	mapstruct *m;
127	object *tmp;	127	object *tmp;
128	int search_arr[SIZEOFFREE];	128	int search_arr[SIZEOFFREE];
129		129
130	get_search_arr(search_arr);	130	get_search_arr (search_arr);
131	for(i=0;i<SIZEOFFREE;i++) {	131	for (i = 0; i < SIZEOFFREE; i++)
		132	{
132	/* modified to implement smart searching using search_arr	133	/* modified to implement smart searching using search_arr
133	* guidance array to determine direction of search order	134	* guidance array to determine direction of search order
134	*/	135	*/
135	nx = npc->x + freearr_x[search_arr[i]];	136	nx = npc->x + freearr_x[search_arr[i]];
136	ny = npc->y + freearr_y[search_arr[i]];	137	ny = npc->y + freearr_y[search_arr[i]];
137	m = npc->map;	138	m = npc->map;
138		139
139	mflags = get_map_flags(m, &m, nx, ny, &nx, &ny);	140	mflags = get_map_flags (m, &m, nx, ny, &nx, &ny);
140	if (mflags & P_OUT_OF_MAP) continue;	141	if (mflags & P_OUT_OF_MAP)
		142	continue;
141		143
142	if (mflags & P_IS_ALIVE) {	144	if (mflags & P_IS_ALIVE)
		145	{
143	tmp=get_map_ob(m,nx,ny);	146	tmp = get_map_ob (m, nx, ny);
144	while(tmp!=NULL && !QUERY_FLAG(tmp,FLAG_MONSTER)&&	147	while (tmp != NULL && !QUERY_FLAG (tmp, FLAG_MONSTER) && !QUERY_FLAG (tmp, FLAG_GENERATOR) && tmp->type != PLAYER)
145	!QUERY_FLAG(tmp,FLAG_GENERATOR ) && tmp->type!=PLAYER)
146	tmp=tmp->above;	148	tmp = tmp->above;
147		149
148	if (!tmp) {	150	if (!tmp)
		151	{
149	LOG(llevDebug,"find_nearest_living_creature: map %s (%d,%d) has is_alive set but did not find a monster?\n",	152	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);	153	m->path, nx, ny);
151	}	154	}
152	else {	155	else
		156	{
153	if(can_see_monsterP(m,nx,ny,i))	157	if (can_see_monsterP (m, nx, ny, i))
154	return tmp;	158	return tmp;
155	}	159	}
156	} /* is something living on this space */	160	} /* is something living on this space */
157	}	161	}
158	return NULL; /* nothing found */	162	return NULL; /* nothing found */
159	}	163	}
160		164
161		165
162	/* Tries to find an enmy for npc. We pass the range vector since	166	/* Tries to find an enmy for npc. We pass the range vector since
163	* our caller will find the information useful.	167	* our caller will find the information useful.
…		…
165	* Fix function so that we always make calls to get_rangevector	169	* Fix function so that we always make calls to get_rangevector
166	* if we have a valid target - function as not doing so in	170	* if we have a valid target - function as not doing so in
167	* many cases.	171	* many cases.
168	*/	172	*/
169		173
		174	object *
170	object *find_enemy(object *npc, rv_vector *rv)	175	find_enemy (object *npc, rv_vector * rv)
171	{	176	{
172	object *attacker, *tmp=NULL;	177	object *attacker, *tmp = NULL;
173		178
174	attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */	179	attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */
175	npc->attacked_by = NULL; /* always clear the attacker entry */	180	npc->attacked_by = NULL; /* always clear the attacker entry */
176		181
177	/* if we berserk, we don't care about others - we attack all we can find */	182	/* if we berserk, we don't care about others - we attack all we can find */
178	if(QUERY_FLAG(npc,FLAG_BERSERK)) {	183	if (QUERY_FLAG (npc, FLAG_BERSERK))
		184	{
179	tmp = find_nearest_living_creature(npc);	185	tmp = find_nearest_living_creature (npc);
		186	if (tmp)
180	if (tmp) get_rangevector(npc, tmp, rv, 0);	187	get_rangevector (npc, tmp, rv, 0);
181	return tmp;	188	return tmp;
182	}	189	}
183		190
184	/* Here is the main enemy selection.	191	/* Here is the main enemy selection.
185	* We want this: if there is an enemy, attack him until its not possible or	192	* We want this: if there is an enemy, attack him until its not possible or
186	* one of both is dead.	193	* one of both is dead.
187	* If we have no enemy and we are...	194	* If we have no enemy and we are...
188	* a monster: try to find a player, a pet or a friendly monster	195	* 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	196	* 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	197	* a neutral: fight a attacker (but there should be none), then do nothing
191	* a pet: attack player enemy or a monster	198	* a pet: attack player enemy or a monster
192	*/	199	*/
193		200
194	/* pet move */	201	/* pet move */
195	if ((npc->attack_movement & HI4) == PETMOVE) {	202	if ((npc->attack_movement & HI4) == PETMOVE)
		203	{
196	tmp= get_pet_enemy(npc,rv);	204	tmp = get_pet_enemy (npc, rv);
		205	if (tmp)
197	if (tmp) get_rangevector(npc, tmp, rv, 0);	206	get_rangevector (npc, tmp, rv, 0);
198	return tmp;	207	return tmp;
199	}
200		208	}
		209
201	/* we check our old enemy. */	210	/* we check our old enemy. */
202	if((tmp=check_enemy(npc, rv))==NULL)	211	if ((tmp = check_enemy (npc, rv)) == NULL)
203	{	212	{
204	if(attacker) /* if we have an attacker, check him */	213	if (attacker) /* if we have an attacker, check him */
205	{	214	{
206	/* we want be sure this is the right one! */	215	/* we want be sure this is the right one! */
207	if(attacker->count == npc->attacked_by_count)	216	if (attacker->count == npc->attacked_by_count)
208	{	217	{
209	/* TODO: thats not finished */	218	/* TODO: thats not finished */
210	/* we don't want a fight evil vs evil or good against non evil */	219	/* we don't want a fight evil vs evil or good against non evil */
211		220
212	if( QUERY_FLAG(npc, FLAG_NEUTRAL) || QUERY_FLAG(attacker, FLAG_NEUTRAL) || /* neutral */	221	if (QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (attacker, FLAG_NEUTRAL) || /* neutral */
213	(QUERY_FLAG(npc, FLAG_FRIENDLY) && QUERY_FLAG(attacker, FLAG_FRIENDLY)) ||	222	(QUERY_FLAG (npc, FLAG_FRIENDLY) && QUERY_FLAG (attacker, FLAG_FRIENDLY)) ||
214	(!QUERY_FLAG(npc, FLAG_FRIENDLY) &&	223	(!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (attacker, FLAG_FRIENDLY) && attacker->type != PLAYER)))
215	(!QUERY_FLAG(attacker, FLAG_FRIENDLY) && attacker->type!=PLAYER)) )
216	CLEAR_FLAG(npc,FLAG_SLEEP); /* skip it, but lets wakeup */	224	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... */	225	else if (on_same_map (npc, attacker)) /* thats the only thing we must know... */
218	{	226	{
219	CLEAR_FLAG(npc,FLAG_SLEEP); /* well, NOW we really should wake up! */	227	CLEAR_FLAG (npc, FLAG_SLEEP); /* well, NOW we really should wake up! */
220	npc->enemy = attacker;	228	npc->enemy = attacker;
221	return attacker; /* yes, we face our attacker! */	229	return attacker; /* yes, we face our attacker! */
222	}	230	}
223	}	231	}
224	}	232	}
225		233
226	/* we have no legal enemy or attacker, so we try to target a new one */	234	/* 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) &&	235	if (!QUERY_FLAG (npc, FLAG_UNAGGRESSIVE) && !QUERY_FLAG (npc, FLAG_FRIENDLY) && !QUERY_FLAG (npc, FLAG_NEUTRAL))
228	!QUERY_FLAG(npc, FLAG_NEUTRAL))
229	{	236	{
230	npc->enemy = get_nearest_player(npc);	237	npc->enemy = get_nearest_player (npc);
231	if (npc->enemy)	238	if (npc->enemy)
232	tmp = check_enemy(npc,rv);	239	tmp = check_enemy (npc, rv);
233	}
234		240	}
235	}
236		241
		242	}
		243
237	return tmp;	244	return tmp;
238	}	245	}
239		246
240	/* Sees if this monster should wake up.	247	/* Sees if this monster should wake up.
241	* Currently, this is only called from move_monster, and	248	* Currently, this is only called from move_monster, and
242	* if enemy is set, then so should be rv.	249	* if enemy is set, then so should be rv.
243	* returns 1 if the monster should wake up, 0 otherwise.	250	* returns 1 if the monster should wake up, 0 otherwise.
244	*/	251	*/
245		252
		253	int
246	int check_wakeup(object *op, object *enemy, rv_vector *rv) {	254	check_wakeup (object *op, object *enemy, rv_vector * rv)
		255	{
247	int radius = op->stats.Wis>MIN_MON_RADIUS?op->stats.Wis:MIN_MON_RADIUS;	256	int radius = op->stats.Wis > MIN_MON_RADIUS ? op->stats.Wis : MIN_MON_RADIUS;
248		257
249	/* Trim work - if no enemy, no need to do anything below */	258	/* Trim work - if no enemy, no need to do anything below */
250	if (!enemy) return 0;	259	if (!enemy)
		260	return 0;
251		261
252	/* blinded monsters can only find nearby objects to attack */	262	/* blinded monsters can only find nearby objects to attack */
253	if(QUERY_FLAG(op, FLAG_BLIND))	263	if (QUERY_FLAG (op, FLAG_BLIND))
254	radius = MIN_MON_RADIUS;	264	radius = MIN_MON_RADIUS;
255		265
256	/* This covers the situation where the monster is in the dark	266	/* 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	267	* and has an enemy. If the enemy has no carried light (or isnt
258	* glowing!) then the monster has trouble finding the enemy.	268	* glowing!) then the monster has trouble finding the enemy.
259	* Remember we already checked to see if the monster can see in	269	* Remember we already checked to see if the monster can see in
260	* the dark. */	270	* the dark. */
261		271
262	else if(op->map && op->map->darkness>0 && enemy && !enemy->invisible &&	272	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))) {	273	!stand_in_light (enemy) && (!QUERY_FLAG (op, FLAG_SEE_IN_DARK) || !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
		274	{
265	int dark = radius/(op->map->darkness);	275	int dark = radius / (op->map->darkness);
		276
266	radius = (dark>MIN_MON_RADIUS)?(dark+1):MIN_MON_RADIUS;	277	radius = (dark > MIN_MON_RADIUS) ? (dark + 1) : MIN_MON_RADIUS;
267	}	278	}
268	else if(!QUERY_FLAG(op,FLAG_SLEEP)) return 1;	279	else if (!QUERY_FLAG (op, FLAG_SLEEP))
		280	return 1;
269		281
270	/* enemy should already be on this map, so don't really need to check	282	/* enemy should already be on this map, so don't really need to check
271	* for that.	283	* for that.
272	*/	284	*/
273	if (rv->distance < (unsigned int) (QUERY_FLAG(enemy, FLAG_STEALTH) ? (radius / 2) + 1 : radius)) {	285	if (rv->distance < (unsigned int) (QUERY_FLAG (enemy, FLAG_STEALTH) ? (radius / 2) + 1 : radius))
		286	{
274	CLEAR_FLAG(op,FLAG_SLEEP);	287	CLEAR_FLAG (op, FLAG_SLEEP);
		288	return 1;
		289	}
		290	return 0;
		291	}
		292
		293	int
		294	move_randomly (object *op)
		295	{
		296	int i;
		297
		298	/* Give up to 15 chances for a monster to move randomly */
		299	for (i = 0; i < 15; i++)
		300	{
		301	if (move_object (op, RANDOM () % 8 + 1))
275	return 1;	302	return 1;
276	}	303	}
277	return 0;	304	return 0;
278	}
279
280	int move_randomly(object *op) {
281	int i;
282
283	/* Give up to 15 chances for a monster to move randomly */
284	for(i=0;i<15;i++) {
285	if(move_object(op,RANDOM()%8+1))
286	return 1;
287	}
288	return 0;
289	}	305	}
290		306
291	/*	307	/*
292	* Move-monster returns 1 if the object has been freed, otherwise 0.	308	* Move-monster returns 1 if the object has been freed, otherwise 0.
293	*/	309	*/
294		310
		311	int
295	int move_monster(object *op) {	312	move_monster (object *op)
		313	{
296	int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */	314	int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */
297	object *owner, *enemy, *part, *oph=op;	315	object *owner, *enemy, *part, *oph = op;
298	rv_vector rv;	316	rv_vector rv;
299		317
300	/* Monsters not on maps don't do anything. These monsters are things	318	/* Monsters not on maps don't do anything. These monsters are things
301	* Like royal guards in city dwellers inventories.	319	* Like royal guards in city dwellers inventories.
302	*/	320	*/
303	if (!op->map) return 0;	321	if (!op->map)
		322	return 0;
304		323
305	/* for target facing, we copy this value here for fast access */	324	/* for target facing, we copy this value here for fast access */
306	if(oph->head) /* force update the head - one arch one pic */	325	if (oph->head) /* force update the head - one arch one pic */
307	oph = oph->head;	326	oph = oph->head;
308		327
309	if (QUERY_FLAG(op, FLAG_NO_ATTACK)) /* we never ever attack */	328	if (QUERY_FLAG (op, FLAG_NO_ATTACK)) /* we never ever attack */
310	enemy = op->enemy = NULL;	329	enemy = op->enemy = NULL;
311	else if((enemy= find_enemy(op, &rv)))	330	else if ((enemy = find_enemy (op, &rv)))
312	{	331	{
313	/* we have an enemy, just tell him we want him dead */	332	/* we have an enemy, just tell him we want him dead */
314	enemy->attacked_by = op; /* our ptr */	333	enemy->attacked_by = op; /* our ptr */
315	enemy->attacked_by_count = op->count; /* our tag */	334	enemy->attacked_by_count = op->count; /* our tag */
316	}
317		335	}
		336
318	/* generate hp, if applicable */	337	/* generate hp, if applicable */
319	if(op->stats.Con > 0 && op->stats.hp < op->stats.maxhp) {	338	if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
		339	{
320		340
321	/* last heal is in funny units. Dividing by speed puts	341	/* last heal is in funny units. Dividing by speed puts
322	* the regeneration rate on a basis of time instead of	342	* the regeneration rate on a basis of time instead of
323	* #moves the monster makes. The scaling by 8 is	343	* #moves the monster makes. The scaling by 8 is
324	* to capture 8th's of a hp fraction regens	344	* to capture 8th's of a hp fraction regens
325	*	345	*
326	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)	346	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
327	* overflow might produce monsters with negative hp.	347	* overflow might produce monsters with negative hp.
328	*/	348	*/
329		349
330	op->last_heal+= (int)((float)(8*op->stats.Con)/FABS(op->speed));	350	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 */	351	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;	352	op->last_heal %= 32;
333		353
334	/* So if the monster has gained enough HP that they are no longer afraid */	354	/* So if the monster has gained enough HP that they are no longer afraid */
335	if (QUERY_FLAG(op,FLAG_RUN_AWAY) &&	355	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);	356	CLEAR_FLAG (op, FLAG_RUN_AWAY);
339		357
340	if(op->stats.hp>op->stats.maxhp)	358	if (op->stats.hp > op->stats.maxhp)
341	op->stats.hp=op->stats.maxhp;	359	op->stats.hp = op->stats.maxhp;
342	}	360	}
343		361
344	/* generate sp, if applicable */	362	/* generate sp, if applicable */
345	if(op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp) {	363	if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
		364	{
346		365
347	/* last_sp is in funny units. Dividing by speed puts	366	/* last_sp is in funny units. Dividing by speed puts
348	* the regeneration rate on a basis of time instead of	367	* the regeneration rate on a basis of time instead of
349	* #moves the monster makes. The scaling by 8 is	368	* #moves the monster makes. The scaling by 8 is
350	* to capture 8th's of a sp fraction regens	369	* to capture 8th's of a sp fraction regens
351	*	370	*
352	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)	371	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
353	* overflow might produce monsters with negative sp.	372	* overflow might produce monsters with negative sp.
354	*/	373	*/
355		374
356	op->last_sp+= (int)((float)(8*op->stats.Pow)/FABS(op->speed));	375	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 */	376	op->stats.sp = MIN (op->stats.sp + op->last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
358	op->last_sp%=128;	377	op->last_sp %= 128;
359	}	378	}
360		379
361	/* this should probably get modified by many more values.	380	/* this should probably get modified by many more values.
362	* (eg, creatures resistance to fear, level, etc. )	381	* (eg, creatures resistance to fear, level, etc. )
363	*/	382	*/
364	if(QUERY_FLAG(op, FLAG_SCARED) &&!(RANDOM()%20)) {	383	if (QUERY_FLAG (op, FLAG_SCARED) && !(RANDOM () % 20))
		384	{
365	CLEAR_FLAG(op,FLAG_SCARED); /* Time to regain some "guts"... */	385	CLEAR_FLAG (op, FLAG_SCARED); /* Time to regain some "guts"... */
366	}	386	}
367		387
368	if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))	388	if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
369	return QUERY_FLAG (op, FLAG_FREED);	389	return QUERY_FLAG (op, FLAG_FREED);
370		390
371	if ( QUERY_FLAG(op, FLAG_SLEEP) || QUERY_FLAG(op, FLAG_BLIND) ||	391	if (QUERY_FLAG (op, FLAG_SLEEP) || QUERY_FLAG (op, FLAG_BLIND) ||
372	((op->map->darkness>0) && !QUERY_FLAG(op,FLAG_SEE_IN_DARK) &&	392	((op->map->darkness > 0) && !QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
373	!QUERY_FLAG(op,FLAG_SEE_INVISIBLE))) {	393	{
374	if(!check_wakeup(op,enemy,&rv))	394	if (!check_wakeup (op, enemy, &rv))
375	return 0;	395	return 0;
376	}	396	}
377		397
378	/* check if monster pops out of hidden spot */	398	/* check if monster pops out of hidden spot */
		399	if (op->hide)
379	if(op->hide) do_hidden_move(op);	400	do_hidden_move (op);
380		401
381	if(op->pick_up)	402	if (op->pick_up)
382	monster_check_pickup(op);	403	monster_check_pickup (op);
383		404
384	if(op->will_apply)	405	if (op->will_apply)
385	monster_apply_below(op); /* Check for items to apply below */	406	monster_apply_below (op); /* Check for items to apply below */
386		407
387	/* If we don't have an enemy, do special movement or the like */	408	/* If we don't have an enemy, do special movement or the like */
388	if(!enemy) {	409	if (!enemy)
		410	{
389	if(QUERY_FLAG(op, FLAG_ONLY_ATTACK)) {	411	if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
		412	{
390	remove_ob(op);	413	remove_ob (op);
391	free_object(op);	414	free_object (op);
392	return 1;	415	return 1;
393	}	416	}
394		417
395	/* Probably really a bug for a creature to have both	418	/* Probably really a bug for a creature to have both
396	* stand still and a movement type set.	419	* stand still and a movement type set.
397	*/	420	*/
398	if(!QUERY_FLAG(op, FLAG_STAND_STILL)) {	421	if (!QUERY_FLAG (op, FLAG_STAND_STILL))
		422	{
399	if (op->attack_movement & HI4)	423	if (op->attack_movement & HI4)
400	{	424	{
401	switch (op->attack_movement & HI4) {	425	switch (op->attack_movement & HI4)
		426	{
402	case (PETMOVE):	427	case (PETMOVE):
403	pet_move (op);	428	pet_move (op);
404	break;	429	break;
405		430
406	case (CIRCLE1):	431	case (CIRCLE1):
407	circ1_move (op);	432	circ1_move (op);
408	break;	433	break;
409		434
410	case (CIRCLE2):	435	case (CIRCLE2):
411	circ2_move (op);	436	circ2_move (op);
412	break;	437	break;
413		438
414	case (PACEV):	439	case (PACEV):
415	pace_movev(op);	440	pace_movev (op);
416	break;	441	break;
417		442
418	case (PACEH):	443	case (PACEH):
419	pace_moveh(op);	444	pace_moveh (op);
420	break;	445	break;
421		446
422	case (PACEV2):	447	case (PACEV2):
423	pace2_movev (op);	448	pace2_movev (op);
424	break;	449	break;
425		450
426	case (PACEH2):	451	case (PACEH2):
427	pace2_moveh (op);	452	pace2_moveh (op);
428	break;	453	break;
429		454
430	case (RANDO):	455	case (RANDO):
431	rand_move (op);	456	rand_move (op);
432	break;	457	break;
433		458
434	case (RANDO2):	459	case (RANDO2):
435	move_randomly (op);	460	move_randomly (op);
436	break;	461	break;
437	}	462	}
		463	return 0;
		464	}
		465	else if (QUERY_FLAG (op, FLAG_RANDOM_MOVE))
		466	(void) move_randomly (op);
		467
		468	} /* stand still */
		469	return 0;
		470	} /* no enemy */
		471
		472	/* We have an enemy. Block immediately below is for pets */
		473	if ((op->attack_movement & HI4) == PETMOVE && (owner = get_owner (op)) != NULL && !on_same_map (op, owner))
		474	return follow_owner (op, owner);
		475
		476	/* doppleganger code to change monster facing to that of the nearest
		477	* player. Hmm. The code is here, but no monster in the current
		478	* arch set uses it.
		479	*/
		480	if ((op->race != NULL) && strcmp (op->race, "doppleganger") == 0)
		481	{
		482	op->face = enemy->face;
		483	op->name = enemy->name;
		484	}
		485
		486	/* Calculate range information for closest body part - this
		487	* is used for the 'skill' code, which isn't that smart when
		488	* it comes to figuring it out - otherwise, giants throw boulders
		489	* into themselves.
		490	*/
		491	get_rangevector (op, enemy, &rv, 0);
		492
		493	/* Move the check for scared up here - if the monster was scared,
		494	* we were not doing any of the logic below, so might as well save
		495	* a few cpu cycles.
		496	*/
		497	if (!QUERY_FLAG (op, FLAG_SCARED))
		498	{
		499	rv_vector rv1;
		500
		501	/* now we test every part of an object .... this is a real ugly piece of code */
		502	for (part = op; part != NULL; part = part->more)
		503	{
		504	get_rangevector (part, enemy, &rv1, 0x1);
		505	dir = rv1.direction;
		506
		507	/* hm, not sure about this part - in original was a scared flag here too
		508	* but that we test above... so can be old code here
		509	*/
		510	if (QUERY_FLAG (op, FLAG_RUN_AWAY))
		511	dir = absdir (dir + 4);
		512	if (QUERY_FLAG (op, FLAG_CONFUSED))
		513	dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
		514
		515	if (QUERY_FLAG (op, FLAG_CAST_SPELL) && !(RANDOM () % 3))
		516	{
		517	if (monster_cast_spell (op, part, enemy, dir, &rv1))
438	return 0;	518	return 0;
439	}	519	}
440	else if (QUERY_FLAG(op,FLAG_RANDOM_MOVE))
441	(void) move_randomly(op);
442		520
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)) {	521	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	{	522	{
568	/* elmex: Turn our monster after it moved if it has DISTATT attack */	523	if (monster_use_scroll (op, part, enemy, dir, &rv1))
569	if ((op->attack_movement & LO4) == DISTATT)
570	op->direction = pre_att_dir;
571
572	return 0;
573	}
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;	524	return 0;
586	}	525	}
		526
		527	if (QUERY_FLAG (op, FLAG_READY_RANGE) && !(RANDOM () % 3))
		528	{
		529	if (monster_use_range (op, part, enemy, dir))
		530	return 0;
		531	}
		532	if (QUERY_FLAG (op, FLAG_READY_SKILL) && !(RANDOM () % 3))
		533	{
		534	if (monster_use_skill (op, rv.part, enemy, rv.direction))
		535	return 0;
		536	}
		537	if (QUERY_FLAG (op, FLAG_READY_BOW) && !(RANDOM () % 2))
		538	{
		539	if (monster_use_bow (op, part, enemy, dir))
		540	return 0;
		541	}
		542	} /* for processing of all parts */
		543	} /* If not scared */
		544
		545
		546	part = rv.part;
		547	dir = rv.direction;
		548
		549	if (QUERY_FLAG (op, FLAG_SCARED) || QUERY_FLAG (op, FLAG_RUN_AWAY))
		550	dir = absdir (dir + 4);
		551
		552	if (QUERY_FLAG (op, FLAG_CONFUSED))
		553	dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
		554
		555	pre_att_dir = dir; /* remember the original direction */
		556
		557	if ((op->attack_movement & LO4) && !QUERY_FLAG (op, FLAG_SCARED))
		558	{
		559	switch (op->attack_movement & LO4)
587	}	560	{
		561	case DISTATT:
		562	dir = dist_att (dir, op, enemy, part, &rv);
		563	break;
		564
		565	case RUNATT:
		566	dir = run_att (dir, op, enemy, part, &rv);
		567	break;
		568
		569	case HITRUN:
		570	dir = hitrun_att (dir, op, enemy);
		571	break;
		572
		573	case WAITATT:
		574	dir = wait_att (dir, op, enemy, part, &rv);
		575	break;
		576
		577	case RUSH: /* default - monster normally moves towards player */
		578	case ALLRUN:
		579	break;
		580
		581	case DISTHIT:
		582	dir = disthit_att (dir, op, enemy, part, &rv);
		583	break;
		584
		585	case WAIT2:
		586	dir = wait_att2 (dir, op, enemy, part, &rv);
		587	break;
		588
		589	default:
		590	LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
		591	}
		592	}
		593
		594	if (!dir)
		595	return 0;
		596
		597	if (!QUERY_FLAG (op, FLAG_STAND_STILL))
		598	{
		599	if (move_object (op, dir)) /* Can the monster move directly toward player? */
		600	{
		601	/* elmex: Turn our monster after it moved if it has DISTATT attack */
		602	if ((op->attack_movement & LO4) == DISTATT)
		603	op->direction = pre_att_dir;
		604
		605	return 0;
		606	}
		607
		608	if (QUERY_FLAG (op, FLAG_SCARED) || !can_hit (part, enemy, &rv) || QUERY_FLAG (op, FLAG_RUN_AWAY))
		609	{
		610
		611	/* Try move around corners if !close */
		612	int maxdiff = (QUERY_FLAG (op, FLAG_ONLY_ATTACK) || RANDOM () & 1) ? 1 : 2;
		613
		614	for (diff = 1; diff <= maxdiff; diff++)
		615	{
		616	/* try different detours */
		617	int m = 1 - (RANDOM () & 2); /* Try left or right first? */
		618
		619	if (move_object (op, absdir (dir + diff * m)) || move_object (op, absdir (dir - diff * m)))
		620	return 0;
		621	}
		622	}
588	} /* if monster is not standing still */	623	} /* if monster is not standing still */
589		624
590	/* elmex: Turn our monster after it moved if it has DISTATT attack */	625	/* elmex: Turn our monster after it moved if it has DISTATT attack */
591	if ((op->attack_movement & LO4) == DISTATT)	626	if ((op->attack_movement & LO4) == DISTATT)
592	op->direction = pre_att_dir;	627	op->direction = pre_att_dir;
593		628
594	/*	629	/*
595	* Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random	630	* Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
596	* direction if they can't move away.	631	* direction if they can't move away.
597	*/	632	*/
598	if (!QUERY_FLAG(op, FLAG_ONLY_ATTACK)&&(QUERY_FLAG(op,FLAG_RUN_AWAY)||QUERY_FLAG(op, FLAG_SCARED)))	633	if (!QUERY_FLAG (op, FLAG_ONLY_ATTACK) && (QUERY_FLAG (op, FLAG_RUN_AWAY) || QUERY_FLAG (op, FLAG_SCARED)))
599	if(move_randomly(op))	634	if (move_randomly (op))
600	return 0;	635	return 0;
601		636
602	/*	637	/*
603	* Try giving the monster a new enemy - the player that is closest	638	* 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	639	* to it. In this way, it won't just keep trying to get to a target
605	* that is inaccessible.	640	* that is inaccessible.
606	* This could be more clever - it should go through a list of several	641	* 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	642	* enemies, as it is now, you could perhaps get situations where there
608	* are two players flanking the monster at close distance, but which	643	* 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	644	* 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	645	* the monster could get to - as it is, the monster won't look at that
611	* third one.	646	* third one.
612	*/	647	*/
613	if (!QUERY_FLAG(op, FLAG_FRIENDLY) && enemy == op->enemy)	648	if (!QUERY_FLAG (op, FLAG_FRIENDLY) && enemy == op->enemy)
614	{	649	{
615	object *nearest_player = get_nearest_player(op);	650	object *nearest_player = get_nearest_player (op);
		651
616	if (nearest_player && nearest_player != enemy && !can_hit(part,enemy,&rv)) {	652	if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
		653	{
617	op->enemy = NULL;	654	op->enemy = NULL;
618	enemy = nearest_player;	655	enemy = nearest_player;
619	}	656	}
620	}	657	}
621		658
622	if(!QUERY_FLAG(op, FLAG_SCARED)&&can_hit(part,enemy,&rv))	659	if (!QUERY_FLAG (op, FLAG_SCARED) && can_hit (part, enemy, &rv))
623	{	660	{
624	/* The adjustement to wc that was here before looked totally bogus -	661	/* The adjustement to wc that was here before looked totally bogus -
625	* since wc can in fact get negative, that would mean by adding	662	* since wc can in fact get negative, that would mean by adding
626	* the current wc, the creature gets better? Instead, just	663	* the current wc, the creature gets better? Instead, just
627	* add a fixed amount - nasty creatures that are runny away should	664	* add a fixed amount - nasty creatures that are runny away should
628	* still be pretty nasty.	665	* still be pretty nasty.
629	*/	666	*/
630	if(QUERY_FLAG(op,FLAG_RUN_AWAY))	667	if (QUERY_FLAG (op, FLAG_RUN_AWAY))
631	{	668	{
632	part->stats.wc+=10;	669	part->stats.wc += 10;
633	(void)skill_attack(enemy,part,0,NULL, NULL);	670	(void) skill_attack (enemy, part, 0, NULL, NULL);
634	part->stats.wc-=10;	671	part->stats.wc -= 10;
635	}	672	}
636	else	673	else
637	(void)skill_attack(enemy,part,0,NULL, NULL);	674	(void) skill_attack (enemy, part, 0, NULL, NULL);
638	} /* if monster is in attack range */	675	} /* if monster is in attack range */
639		676
640	if(QUERY_FLAG(part,FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */	677	if (QUERY_FLAG (part, FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
641	return 1;	678	return 1;
642		679
643	if(QUERY_FLAG(op, FLAG_ONLY_ATTACK))	680	if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
644	{	681	{
645	remove_ob(op);	682	remove_ob (op);
646	free_object(op);	683	free_object (op);
		684	return 1;
		685	}
		686	return 0;
		687	}
		688
		689	int
		690	can_hit (object *ob1, object *ob2, rv_vector * rv)
		691	{
		692	object *more;
		693	rv_vector rv1;
		694
		695	if (QUERY_FLAG (ob1, FLAG_CONFUSED) && !(RANDOM () % 3))
		696	return 0;
		697
		698	if (abs (rv->distance_x) < 2 && abs (rv->distance_y) < 2)
		699	return 1;
		700
		701	/* check all the parts of ob2 - just because we can't get to
		702	* its head doesn't mean we don't want to pound its feet
		703	*/
		704	for (more = ob2->more; more != NULL; more = more->more)
		705	{
		706	get_rangevector (ob1, more, &rv1, 0);
		707	if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
647	return 1;	708	return 1;
648	}	709	}
649	return 0;	710	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		711
670	}	712	}
671		713
672	/* Returns 1 is monster should cast spell sp at an enemy	714	/* Returns 1 is monster should cast spell sp at an enemy
673	* Returns 0 if the monster should not cast this spell.	715	* Returns 0 if the monster should not cast this spell.
…		…
683	* This could be a lot smarter - if there are few monsters around,	725	* 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,	726	* then disease might not be as bad. Likewise, if the monster is damaged,
685	* the right type of healing spell could be useful.	727	* the right type of healing spell could be useful.
686	*/	728	*/
687		729
		730	static int
688	static int monster_should_cast_spell(object *monster, object *spell_ob)	731	monster_should_cast_spell (object *monster, object *spell_ob)
689	{	732	{
690	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||	733	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||
691	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||	734	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||
692	spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||	735	spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||
693	spell_ob->subtype == SP_MAGIC_MISSILE || spell_ob->subtype == SP_SUMMON_GOLEM ||	736	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 ||	737	spell_ob->subtype == SP_MAGIC_WALL || spell_ob->subtype == SP_SUMMON_MONSTER ||
695	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM ||	738	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE)
696	spell_ob->subtype == SP_INVISIBLE)
697		739
698	return 1;
699
700	return 0;	740	return 1;
		741
		742	return 0;
701	}	743	}
702		744
703		745
704	#define MAX_KNOWN_SPELLS 20	746	#define MAX_KNOWN_SPELLS 20
705		747
706	/* Returns a randomly selected spell. This logic is still	748	/* Returns a randomly selected spell. This logic is still
707	* less than ideal. This code also only seems to deal with	749	* less than ideal. This code also only seems to deal with
708	* wizard spells, as the check is against sp, and not grace.	750	* wizard spells, as the check is against sp, and not grace.
709	* can mosnters know cleric spells?	751	* can mosnters know cleric spells?
710	*/	752	*/
		753	object *
711	object *monster_choose_random_spell(object *monster) {	754	monster_choose_random_spell (object *monster)
		755	{
712	object *altern[MAX_KNOWN_SPELLS];	756	object *altern[MAX_KNOWN_SPELLS];
713	object *tmp;	757	object *tmp;
714	int i=0;	758	int i = 0;
715		759
716	for(tmp=monster->inv;tmp!=NULL;tmp=tmp->below)	760	for (tmp = monster->inv; tmp != NULL; tmp = tmp->below)
717	if (tmp->type==SPELLBOOK || tmp->type==SPELL) {	761	if (tmp->type == SPELLBOOK || tmp->type == SPELL)
		762	{
718	/* Check and see if it's actually a useful spell.	763	/* Check and see if it's actually a useful spell.
719	* If its a spellbook, the spell is actually the inventory item.	764	* If its a spellbook, the spell is actually the inventory item.
720	* if it is a spell, then it is just the object itself.	765	* if it is a spell, then it is just the object itself.
721	*/	766	*/
722	if (monster_should_cast_spell(monster, (tmp->type==SPELLBOOK)?tmp->inv:tmp)) {	767	if (monster_should_cast_spell (monster, (tmp->type == SPELLBOOK) ? tmp->inv : tmp))
		768	{
723	altern[i++]=tmp;	769	altern[i++] = tmp;
724	if(i==MAX_KNOWN_SPELLS)	770	if (i == MAX_KNOWN_SPELLS)
725	break;	771	break;
726	}	772	}
727	}	773	}
728	if(!i)	774	if (!i)
729	return NULL;	775	return NULL;
730	return altern[RANDOM()%i];	776	return altern[RANDOM () % i];
731	}	777	}
732		778
733	/* This checks to see if the monster should cast a spell/ability.	779	/* 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.	780	* it returns true if the monster casts a spell, 0 if he doesn't.
735	* head is the head of the monster.	781	* head is the head of the monster.
…		…
737	* pl is the target.	783	* pl is the target.
738	* dir is the direction to case.	784	* dir is the direction to case.
739	* rv is the vector which describes where the enemy is.	785	* rv is the vector which describes where the enemy is.
740	*/	786	*/
741		787
		788	int
742	int monster_cast_spell(object *head, object *part,object *pl,int dir, rv_vector *rv) {	789	monster_cast_spell (object *head, object *part, object *pl, int dir, rv_vector * rv)
		790	{
743	object *spell_item;	791	object *spell_item;
744	object *owner;	792	object *owner;
745	rv_vector rv1;	793	rv_vector rv1;
746		794
747	/* If you want monsters to cast spells over friends, this spell should	795	/* 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	796	* 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	797	* 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	798	* clear path to the player, the side aspects of the code will still hit
751	* other monsters)	799	* other monsters)
752	*/	800	*/
753	if(!(dir=path_to_player(part,pl,0)))	801	if (!(dir = path_to_player (part, pl, 0)))
754	return 0;	802	return 0;
755		803
756	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	804	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = get_owner (head)) != NULL)
		805	{
757	get_rangevector(head, owner, &rv1, 0x1);	806	get_rangevector (head, owner, &rv1, 0x1);
758	if(dirdiff(dir,rv1.direction) < 2) {	807	if (dirdiff (dir, rv1.direction) < 2)
759	return 0; /* Might hit owner with spell */
760	}	808	{
		809	return 0; /* Might hit owner with spell */
		810	}
761	}	811	}
762		812
763	if(QUERY_FLAG(head,FLAG_CONFUSED))	813	if (QUERY_FLAG (head, FLAG_CONFUSED))
764	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	814	dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
765		815
766	/* If the monster hasn't already chosen a spell, choose one	816	/* 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	817	* 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).	818	* could be different by the time the monster goes again).
769	*/	819	*/
770	if(head->spellitem==NULL) {	820	if (head->spellitem == NULL)
		821	{
771	if((spell_item=monster_choose_random_spell(head))==NULL) {	822	if ((spell_item = monster_choose_random_spell (head)) == NULL)
		823	{
772	LOG(llevMonster,"Turned off spells in %s\n",&head->name);	824	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 */	825	CLEAR_FLAG (head, FLAG_CAST_SPELL); /* Will be turned on when picking up book */
774	return 0;	826	return 0;
775	}	827	}
776	if (spell_item->type == SPELLBOOK) {	828	if (spell_item->type == SPELLBOOK)
		829	{
777	if (!spell_item->inv) {	830	if (!spell_item->inv)
		831	{
778	LOG(llevError,"spellbook %s does not contain a spell?\n", &spell_item->name);	832	LOG (llevError, "spellbook %s does not contain a spell?\n", &spell_item->name);
779	return 0;	833	return 0;
780	}	834	}
781	spell_item=spell_item->inv;	835	spell_item = spell_item->inv;
782	}	836	}
783	}	837	}
784	else	838	else
785	spell_item=head->spellitem;	839	spell_item = head->spellitem;
786		840
787	if (!spell_item) return 0;	841	if (!spell_item)
		842	return 0;
788		843
789	/* Best guess this is a defensive/healing spell */	844	/* Best guess this is a defensive/healing spell */
790	if (spell_item->range<=1 || spell_item->stats.dam < 0)	845	if (spell_item->range <= 1 || spell_item->stats.dam < 0)
791	dir = 0;	846	dir = 0;
792		847
793	/* Monster doesn't have enough spell-points */	848	/* Monster doesn't have enough spell-points */
794	if(head->stats.sp<SP_level_spellpoint_cost(head,spell_item, SPELL_MANA))	849	if (head->stats.sp < SP_level_spellpoint_cost (head, spell_item, SPELL_MANA))
795	return 0;	850	return 0;
796		851
797	if(head->stats.grace<SP_level_spellpoint_cost(head,spell_item, SPELL_GRACE))	852	if (head->stats.grace < SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE))
798	return 0;	853	return 0;
799		854
800	head->stats.sp-=SP_level_spellpoint_cost(head,spell_item, SPELL_MANA);	855	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);	856	head->stats.grace -= SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE);
802		857
803	/* set this to null, so next time monster will choose something different */	858	/* set this to null, so next time monster will choose something different */
804	head->spellitem = NULL;	859	head->spellitem = NULL;
805		860
806	return cast_spell(part,part,dir, spell_item, NULL);	861	return cast_spell (part, part, dir, spell_item, NULL);
807	}	862	}
808		863
809		864
		865	int
810	int monster_use_scroll(object *head, object *part,object *pl,int dir, rv_vector *rv) {	866	monster_use_scroll (object *head, object *part, object *pl, int dir, rv_vector * rv)
		867	{
811	object *scroll;	868	object *scroll;
812	object *owner;	869	object *owner;
813	rv_vector rv1;	870	rv_vector rv1;
814		871
815	/* If you want monsters to cast spells over friends, this spell should	872	/* 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	873	* 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	874	* 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	875	* clear path to the player, the side aspects of the code will still hit
819	* other monsters)	876	* other monsters)
820	*/	877	*/
821	if(!(dir=path_to_player(part,pl,0)))	878	if (!(dir = path_to_player (part, pl, 0)))
822	return 0;	879	return 0;
823		880
824	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	881	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = get_owner (head)) != NULL)
		882	{
825	get_rangevector(head, owner, &rv1, 0x1);	883	get_rangevector (head, owner, &rv1, 0x1);
826	if(dirdiff(dir,rv1.direction) < 2) {	884	if (dirdiff (dir, rv1.direction) < 2)
827	return 0; /* Might hit owner with spell */
828	}	885	{
		886	return 0; /* Might hit owner with spell */
		887	}
829	}	888	}
830		889
831	if(QUERY_FLAG(head,FLAG_CONFUSED))	890	if (QUERY_FLAG (head, FLAG_CONFUSED))
832	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	891	dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
833		892
834	for (scroll=head->inv; scroll; scroll=scroll->below)	893	for (scroll = head->inv; scroll; scroll = scroll->below)
835	if (scroll->type == SCROLL && monster_should_cast_spell(head, scroll->inv)) break;	894	if (scroll->type == SCROLL && monster_should_cast_spell (head, scroll->inv))
		895	break;
836		896
837	/* Used up all his scrolls, so nothing do to */	897	/* Used up all his scrolls, so nothing do to */
838	if (!scroll) {	898	if (!scroll)
		899	{
839	CLEAR_FLAG(head, FLAG_READY_SCROLL);	900	CLEAR_FLAG (head, FLAG_READY_SCROLL);
840	return 0;	901	return 0;
841	}	902	}
842		903
843	/* Spell should be cast on caster (ie, heal, strength) */	904	/* Spell should be cast on caster (ie, heal, strength) */
844	if (scroll->inv->range==0)	905	if (scroll->inv->range == 0)
845	dir = 0;	906	dir = 0;
846		907
847	apply_scroll(part, scroll, dir);	908	apply_scroll (part, scroll, dir);
848	return 1;	909	return 1;
849	}	910	}
850		911
851	/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.	912	/* 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	913	* Note that monsters do not need the skills SK_MELEE_WEAPON and
853	* SK_MISSILE_WEAPON to make those respective attacks, if we	914	* SK_MISSILE_WEAPON to make those respective attacks, if we
…		…
856	*	917	*
857	* The skills we are treating here are all but those. -b.t.	918	* The skills we are treating here are all but those. -b.t.
858	*	919	*
859	* At the moment this is only useful for throwing, perhaps for	920	* 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	921	* stealing. TODO: This should be more integrated in the game. -MT, 25.11.01
861	*/	922	*/
862		923
		924	int
863	int monster_use_skill(object *head, object *part, object *pl,int dir) {	925	monster_use_skill (object *head, object *part, object *pl, int dir)
		926	{
864	object *skill, *owner;	927	object *skill, *owner;
865		928
866	if(!(dir=path_to_player(part,pl,0)))	929	if (!(dir = path_to_player (part, pl, 0)))
867	return 0;	930	return 0;
868		931
869	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	932	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = get_owner (head)) != NULL)
		933	{
870	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	934	int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
		935
871	if(dirdiff(dir,dir2) < 1)	936	if (dirdiff (dir, dir2) < 1)
872	return 0; /* Might hit owner with skill -thrown rocks for example ?*/	937	return 0; /* Might hit owner with skill -thrown rocks for example ? */
873	}	938	}
874	if(QUERY_FLAG(head,FLAG_CONFUSED))	939	if (QUERY_FLAG (head, FLAG_CONFUSED))
875	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	940	dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
876		941
877	/* skill selection - monster will use the next unused skill.	942	/* skill selection - monster will use the next unused skill.
878	* well...the following scenario will allow the monster to	943	* well...the following scenario will allow the monster to
879	* toggle between 2 skills. One day it would be nice to make	944	* toggle between 2 skills. One day it would be nice to make
880	* more skills available to monsters.	945	* more skills available to monsters.
881	*/	946	*/
882		947
883	for(skill=head->inv;skill!=NULL;skill=skill->below)	948	for (skill = head->inv; skill != NULL; skill = skill->below)
884	if(skill->type==SKILL && skill!=head->chosen_skill) {	949	if (skill->type == SKILL && skill != head->chosen_skill)
		950	{
885	head->chosen_skill=skill;	951	head->chosen_skill = skill;
886	break;	952	break;
887	}	953	}
888		954
889	if(!skill && !head->chosen_skill) {	955	if (!skill && !head->chosen_skill)
		956	{
890	LOG(llevDebug,"Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n",	957	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);	958	CLEAR_FLAG (head, FLAG_READY_SKILL);
893	return 0;	959	return 0;
894	}	960	}
895	/* use skill */	961	/* use skill */
896	return do_skill(head, part, head->chosen_skill,dir,NULL);	962	return do_skill (head, part, head->chosen_skill, dir, NULL);
897	}	963	}
898		964
899	/* Monster will use a ranged spell attack. */	965	/* Monster will use a ranged spell attack. */
900		966
		967	int
901	int monster_use_range(object *head,object *part,object *pl,int dir)	968	monster_use_range (object *head, object *part, object *pl, int dir)
902	{	969	{
903	object *wand, *owner;	970	object *wand, *owner;
904	int at_least_one = 0;	971	int at_least_one = 0;
905		972
906	if(!(dir=path_to_player(part,pl,0)))	973	if (!(dir = path_to_player (part, pl, 0)))
907	return 0;	974	return 0;
908		975
909	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	976	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = get_owner (head)) != NULL)
		977	{
910	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	978	int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
		979
911	if(dirdiff(dir,dir2) < 2)	980	if (dirdiff (dir, dir2) < 2)
912	return 0; /* Might hit owner with spell */	981	return 0; /* Might hit owner with spell */
913	}	982	}
914	if(QUERY_FLAG(head,FLAG_CONFUSED))	983	if (QUERY_FLAG (head, FLAG_CONFUSED))
915	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	984	dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
916		985
917	for(wand=head->inv;wand!=NULL;wand=wand->below)	986	for (wand = head->inv; wand != NULL; wand = wand->below)
918	{	987	{
919	if (wand->type == WAND)	988	if (wand->type == WAND)
		989	{
		990	/* Found a wand, let's see if it has charges left */
		991	at_least_one = 1;
		992	if (wand->stats.food <= 0)
		993	continue;
		994
		995	cast_spell (head, wand, dir, wand->inv, NULL);
		996
		997	if (!(--wand->stats.food))
920	{	998	{
921	/* Found a wand, let's see if it has charges left */	999	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	{	1000	{
930	if ( wand->arch )
931	{
932	CLEAR_FLAG(wand, FLAG_ANIMATE);	1001	CLEAR_FLAG (wand, FLAG_ANIMATE);
933	wand->face = wand->arch->clone.face;	1002	wand->face = wand->arch->clone.face;
934	wand->speed = 0;	1003	wand->speed = 0;
935	update_ob_speed(wand);	1004	update_ob_speed (wand);
936	}
937	}	1005	}
938	/* Success */
939	return 1;
940	}	1006	}
		1007	/* Success */
		1008	return 1;
		1009	}
941	else if ( wand->type == ROD || wand->type==HORN ) {	1010	else if (wand->type == ROD || wand->type == HORN)
		1011	{
942	/* Found rod/horn, let's use it if possible */	1012	/* Found rod/horn, let's use it if possible */
943	at_least_one = 1;	1013	at_least_one = 1;
944	if( wand->stats.hp < MAX( wand->inv->stats.sp, wand->inv->stats.grace ) )	1014	if (wand->stats.hp < MAX (wand->inv->stats.sp, wand->inv->stats.grace))
945	continue;	1015	continue;
946		1016
947	/* drain charge before casting spell - can be a case where the	1017	/* drain charge before casting spell - can be a case where the
948	* spell destroys the monster, and rod, so if done after, results	1018	* spell destroys the monster, and rod, so if done after, results
949	* in crash.	1019	* in crash.
950	*/	1020	*/
951	drain_rod_charge( wand );	1021	drain_rod_charge (wand);
952	cast_spell( head, wand, dir, wand->inv, NULL );	1022	cast_spell (head, wand, dir, wand->inv, NULL);
953		1023
954	/* Success */	1024	/* Success */
955	return 1;	1025	return 1;
956	}	1026	}
957	}	1027	}
958		1028
959	if ( at_least_one )	1029	if (at_least_one)
960	return 0;	1030	return 0;
961		1031
962	LOG(llevError,"Error: Monster %s (%d) HAS_READY_RANG() without wand/horn/rod.\n",	1032	LOG (llevError, "Error: Monster %s (%d) HAS_READY_RANG() without wand/horn/rod.\n", &head->name, head->count);
963	&head->name,head->count);
964	CLEAR_FLAG(head, FLAG_READY_RANGE);	1033	CLEAR_FLAG (head, FLAG_READY_RANGE);
965	return 0;	1034	return 0;
966	}	1035	}
967		1036
		1037	int
968	int monster_use_bow(object *head, object *part, object *pl, int dir) {	1038	monster_use_bow (object *head, object *part, object *pl, int dir)
		1039	{
969	object *owner;	1040	object *owner;
970		1041
971	if(!(dir=path_to_player(part,pl,0)))	1042	if (!(dir = path_to_player (part, pl, 0)))
972	return 0;	1043	return 0;
973	if(QUERY_FLAG(head,FLAG_CONFUSED))	1044	if (QUERY_FLAG (head, FLAG_CONFUSED))
974	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	1045	dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
975		1046
976	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	1047	if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = get_owner (head)) != NULL)
		1048	{
977	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	1049	int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
		1050
978	if(dirdiff(dir,dir2) < 1)	1051	if (dirdiff (dir, dir2) < 1)
979	return 0; /* Might hit owner with arrow */	1052	return 0; /* Might hit owner with arrow */
980	}	1053	}
981		1054
982	/* in server/player.c */	1055	/* in server/player.c */
983	return fire_bow(head, part, NULL, dir, 0, part->x, part->y);	1056	return fire_bow (head, part, NULL, dir, 0, part->x, part->y);
984		1057
985	}	1058	}
986		1059
987	/* Checks if putting on 'item' will make 'who' do more	1060	/* Checks if putting on 'item' will make 'who' do more
988	* damage. This is a very simplistic check - also checking things	1061	* damage. This is a very simplistic check - also checking things
989	* like speed and ac are also relevant.	1062	* like speed and ac are also relevant.
990	*	1063	*
991	* return true if item is a better object.	1064	* return true if item is a better object.
992	*/	1065	*/
993		1066
		1067	int
994	int check_good_weapon(object *who, object *item) {	1068	check_good_weapon (object *who, object *item)
		1069	{
995	object *other_weap;	1070	object *other_weap;
996	int val=0, i;	1071	int val = 0, i;
997		1072
998	for(other_weap=who->inv;other_weap!=NULL;other_weap=other_weap->below)	1073	for (other_weap = who->inv; other_weap != NULL; other_weap = other_weap->below)
999	if(other_weap->type==item->type&&QUERY_FLAG(other_weap,FLAG_APPLIED))	1074	if (other_weap->type == item->type && QUERY_FLAG (other_weap, FLAG_APPLIED))
1000	break;	1075	break;
1001		1076
1002	if(other_weap==NULL) /* No other weapons */	1077	if (other_weap == NULL) /* No other weapons */
1003	return 1;	1078	return 1;
1004		1079
1005	/* Rather than go through and apply the new one, and see if it is	1080	/* Rather than go through and apply the new one, and see if it is
1006	* better, just do some simple checks	1081	* better, just do some simple checks
1007	* Put some multipliers for things that hvae several effects,	1082	* Put some multipliers for things that hvae several effects,
1008	* eg, magic affects both damage and wc, so it has more weight	1083	* eg, magic affects both damage and wc, so it has more weight
1009	*/	1084	*/
1010		1085
1011	val = item->stats.dam - other_weap->stats.dam;	1086	val = item->stats.dam - other_weap->stats.dam;
1012	val += (item->magic - other_weap->magic) * 3;	1087	val += (item->magic - other_weap->magic) * 3;
1013	/* Monsters don't really get benefits from things like regen rates	1088	/* Monsters don't really get benefits from things like regen rates
1014	* from items. But the bonus for their stats are very important.	1089	* from items. But the bonus for their stats are very important.
1015	*/	1090	*/
1016	for (i=0; i<NUM_STATS; i++)	1091	for (i = 0; i < NUM_STATS; i++)
1017	val += (get_attr_value(&item->stats, i) - get_attr_value(&other_weap->stats, i))*2;	1092	val += (get_attr_value (&item->stats, i) - get_attr_value (&other_weap->stats, i)) * 2;
1018		1093
1019	if (val > 0) return 1;	1094	if (val > 0)
		1095	return 1;
		1096	else
1020	else return 0;	1097	return 0;
1021		1098
1022	}	1099	}
1023		1100
		1101	int
1024	int check_good_armour(object *who, object *item) {	1102	check_good_armour (object *who, object *item)
		1103	{
1025	object *other_armour;	1104	object *other_armour;
1026	int val=0,i;	1105	int val = 0, i;
1027		1106
1028	for (other_armour = who->inv; other_armour != NULL;	1107	for (other_armour = who->inv; other_armour != NULL; other_armour = other_armour->below)
1029	other_armour = other_armour->below)
1030	if (other_armour->type == item->type && QUERY_FLAG(other_armour,FLAG_APPLIED))	1108	if (other_armour->type == item->type && QUERY_FLAG (other_armour, FLAG_APPLIED))
1031	break;	1109	break;
1032		1110
1033	if (other_armour == NULL) /* No other armour, use the new */	1111	if (other_armour == NULL) /* No other armour, use the new */
1034	return 1;	1112	return 1;
1035		1113
1036	/* Like above function , see which is better */	1114	/* Like above function , see which is better */
1037	val = item->stats.ac - other_armour->stats.ac;	1115	val = item->stats.ac - other_armour->stats.ac;
1038	val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL])/5;	1116	val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL]) / 5;
1039	val += (item->magic - other_armour->magic) * 3;	1117	val += (item->magic - other_armour->magic) * 3;
1040		1118
1041	/* for the other protections, do weigh them very much in the equation -	1119	/* 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	1120	* 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.	1121	* 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	1122	* 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.	1123	* value. If the reverse, then decrease the value of this item some.
1046	*/	1124	*/
1047	for (i=1; i <NROFATTACKS; i++) {	1125	for (i = 1; i < NROFATTACKS; i++)
		1126	{
1048	if (item->resist[i] > other_armour->resist[i]) val++;	1127	if (item->resist[i] > other_armour->resist[i])
		1128	val++;
1049	else if (item->resist[i] < other_armour->resist[i]) val--;	1129	else if (item->resist[i] < other_armour->resist[i])
		1130	val--;
1050	}	1131	}
1051		1132
1052	/* Very few armours have stats, so not much need to worry about those. */	1133	/* Very few armours have stats, so not much need to worry about those. */
1053		1134
1054	if (val > 0) return 1;	1135	if (val > 0)
		1136	return 1;
		1137	else
1055	else return 0;	1138	return 0;
1056		1139
1057	}	1140	}
1058		1141
1059	/*	1142	/*
1060	* monster_check_pickup(): checks for items that monster can pick up.	1143	* monster_check_pickup(): checks for items that monster can pick up.
…		…
1070	* became a recursive loop. It may be better to call monster_check_apply	1153	* 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	1154	* after we pick everything up, since that function may call others which
1072	* affect stacking on this space.	1155	* affect stacking on this space.
1073	*/	1156	*/
1074		1157
		1158	void
1075	void monster_check_pickup(object *monster) {	1159	monster_check_pickup (object *monster)
		1160	{
1076	object *tmp,*next;	1161	object *tmp, *next;
1077	int next_tag;	1162	int next_tag;
1078		1163
1079	for(tmp=monster->below;tmp!=NULL;tmp=next) {	1164	for (tmp = monster->below; tmp != NULL; tmp = next)
		1165	{
1080	next=tmp->below;	1166	next = tmp->below;
1081	next_tag = next ? next->count : 0;	1167	next_tag = next ? next->count : 0;
1082	if (monster_can_pick(monster,tmp)) {	1168	if (monster_can_pick (monster, tmp))
		1169	{
1083	remove_ob(tmp);	1170	remove_ob (tmp);
1084	tmp = insert_ob_in_ob(tmp,monster);	1171	tmp = insert_ob_in_ob (tmp, monster);
1085	(void) monster_check_apply(monster,tmp);	1172	(void) monster_check_apply (monster, tmp);
1086	}	1173	}
1087	/* We could try to re-establish the cycling, of the space, but probably	1174	/* We could try to re-establish the cycling, of the space, but probably
1088	* not a big deal to just bail out.	1175	* not a big deal to just bail out.
1089	*/	1176	*/
1090	if (next && was_destroyed(next, next_tag)) return;	1177	if (next && was_destroyed (next, next_tag))
		1178	return;
1091	}	1179	}
1092	}	1180	}
1093		1181
1094	/*	1182	/*
1095	* monster_can_pick(): If the monster is interested in picking up	1183	* monster_can_pick(): If the monster is interested in picking up
1096	* the item, then return 0. Otherwise 0.	1184	* the item, then return 0. Otherwise 0.
1097	* Instead of pick_up, flags for "greed", etc, should be used.	1185	* Instead of pick_up, flags for "greed", etc, should be used.
1098	* I've already utilized flags for bows, wands, rings, etc, etc. -Frank.	1186	* I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
1099	*/	1187	*/
1100		1188
		1189	int
1101	int monster_can_pick(object *monster, object *item) {	1190	monster_can_pick (object *monster, object *item)
		1191	{
1102	int flag=0;	1192	int flag = 0;
1103	int i;	1193	int i;
1104		1194
1105	if(!can_pick(monster,item))	1195	if (!can_pick (monster, item))
1106	return 0;	1196	return 0;
1107		1197
1108	if(QUERY_FLAG(item,FLAG_UNPAID))	1198	if (QUERY_FLAG (item, FLAG_UNPAID))
1109	return 0;	1199	return 0;
1110		1200
1111	if (monster->pick_up&64) /* All */	1201	if (monster->pick_up & 64) /* All */
1112	flag=1;	1202	flag = 1;
1113		1203
		1204	else
1114	else switch(item->type) {	1205	switch (item->type)
		1206	{
1115	case MONEY:	1207	case MONEY:
1116	case GEM:	1208	case GEM:
1117	flag=monster->pick_up&2;	1209	flag = monster->pick_up & 2;
1118	break;	1210	break;
1119		1211
1120	case FOOD:	1212	case FOOD:
1121	flag=monster->pick_up&4;	1213	flag = monster->pick_up & 4;
1122	break;	1214	break;
1123		1215
1124	case WEAPON:	1216	case WEAPON:
1125	flag=(monster->pick_up&8)||QUERY_FLAG(monster,FLAG_USE_WEAPON);	1217	flag = (monster->pick_up & 8) || QUERY_FLAG (monster, FLAG_USE_WEAPON);
1126	break;	1218	break;
1127		1219
1128	case ARMOUR:	1220	case ARMOUR:
1129	case SHIELD:	1221	case SHIELD:
1130	case HELMET:	1222	case HELMET:
1131	case BOOTS:	1223	case BOOTS:
1132	case GLOVES:	1224	case GLOVES:
1133	case GIRDLE:	1225	case GIRDLE:
1134	flag=(monster->pick_up&16)||QUERY_FLAG(monster,FLAG_USE_ARMOUR);	1226	flag = (monster->pick_up & 16) || QUERY_FLAG (monster, FLAG_USE_ARMOUR);
1135	break;	1227	break;
1136		1228
1137	case SKILL:	1229	case SKILL:
1138	flag=QUERY_FLAG(monster,FLAG_CAN_USE_SKILL);	1230	flag = QUERY_FLAG (monster, FLAG_CAN_USE_SKILL);
1139	break;	1231	break;
1140		1232
1141	case RING:	1233	case RING:
1142	flag=QUERY_FLAG(monster,FLAG_USE_RING);	1234	flag = QUERY_FLAG (monster, FLAG_USE_RING);
1143	break;	1235	break;
1144		1236
1145	case WAND:	1237	case WAND:
1146	case HORN:	1238	case HORN:
1147	case ROD:	1239	case ROD:
1148	flag=QUERY_FLAG(monster,FLAG_USE_RANGE);	1240	flag = QUERY_FLAG (monster, FLAG_USE_RANGE);
1149	break;	1241	break;
1150		1242
1151	case SPELLBOOK:	1243	case SPELLBOOK:
1152	flag=(monster->arch!=NULL&&QUERY_FLAG((&monster->arch->clone),FLAG_CAST_SPELL));	1244	flag = (monster->arch != NULL && QUERY_FLAG ((&monster->arch->clone), FLAG_CAST_SPELL));
1153	break;	1245	break;
1154		1246
1155	case SCROLL:	1247	case SCROLL:
1156	flag = QUERY_FLAG(monster,FLAG_USE_SCROLL);	1248	flag = QUERY_FLAG (monster, FLAG_USE_SCROLL);
1157	break;	1249	break;
1158		1250
1159	case BOW:	1251	case BOW:
1160	case ARROW:	1252	case ARROW:
1161	flag=QUERY_FLAG(monster,FLAG_USE_BOW);	1253	flag = QUERY_FLAG (monster, FLAG_USE_BOW);
1162	break;	1254	break;
1163	}	1255	}
1164	/* Simplistic check - if the monster has a location to equip it, he will	1256	/* 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	1257	* pick it up. Note that this doesn't handle cases where an item may
1166	* use several locations.	1258	* use several locations.
1167	*/	1259	*/
1168	for (i=0; i < NUM_BODY_LOCATIONS; i++) {	1260	for (i = 0; i < NUM_BODY_LOCATIONS; i++)
		1261	{
1169	if (monster->body_info[i] && item->body_info[i]) {	1262	if (monster->body_info[i] && item->body_info[i])
		1263	{
1170	flag=1;	1264	flag = 1;
1171	break;	1265	break;
1172	}	1266	}
1173	}	1267	}
1174		1268
1175	if (((!(monster->pick_up&32))&&flag) || ((monster->pick_up&32)&&(!flag)))	1269	if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
1176	return 1;
1177	return 0;	1270	return 1;
		1271	return 0;
1178	}	1272	}
1179		1273
1180	/*	1274	/*
1181	* monster_apply_below():	1275	* monster_apply_below():
1182	* Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's	1276	* Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
1183	* eager to apply things, encounters something apply-able,	1277	* eager to apply things, encounters something apply-able,
1184	* then make him apply it	1278	* then make him apply it
1185	*/	1279	*/
1186		1280
		1281	void
1187	void monster_apply_below(object *monster) {	1282	monster_apply_below (object *monster)
		1283	{
1188	object *tmp, *next;	1284	object *tmp, *next;
1189		1285
1190	for(tmp=monster->below;tmp!=NULL;tmp=next) {	1286	for (tmp = monster->below; tmp != NULL; tmp = next)
		1287	{
1191	next=tmp->below;	1288	next = tmp->below;
1192	switch (tmp->type) {	1289	switch (tmp->type)
		1290	{
1193	case CF_HANDLE:	1291	case CF_HANDLE:
1194	case TRIGGER:	1292	case TRIGGER:
1195	if (monster->will_apply&1)	1293	if (monster->will_apply & 1)
1196	manual_apply(monster,tmp,0);	1294	manual_apply (monster, tmp, 0);
1197	break;	1295	break;
1198		1296
1199	case TREASURE:	1297	case TREASURE:
1200	if (monster->will_apply&2)	1298	if (monster->will_apply & 2)
1201	manual_apply(monster,tmp,0);	1299	manual_apply (monster, tmp, 0);
1202	break;	1300	break;
1203		1301
1204	}	1302	}
1205	if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))	1303	if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
1206	break;	1304	break;
1207	}	1305	}
1208	}	1306	}
1209		1307
1210	/*	1308	/*
1211	* monster_check_apply() is meant to be called after an item is	1309	* monster_check_apply() is meant to be called after an item is
…		…
1217	* they can pick up all that they can use.	1315	* they can pick up all that they can use.
1218	*/	1316	*/
1219		1317
1220	/* Sept 96, fixed this so skills will be readied -b.t.*/	1318	/* Sept 96, fixed this so skills will be readied -b.t.*/
1221		1319
		1320	void
1222	void monster_check_apply(object *mon, object *item) {	1321	monster_check_apply (object *mon, object *item)
		1322	{
1223		1323
1224	int flag = 0;	1324	int flag = 0;
1225		1325
1226	if(item->type==SPELLBOOK&&
1227	mon->arch!=NULL&&(QUERY_FLAG((&mon->arch->clone),FLAG_CAST_SPELL))) {	1326	if (item->type == SPELLBOOK && mon->arch != NULL && (QUERY_FLAG ((&mon->arch->clone), FLAG_CAST_SPELL)))
		1327	{
1228	SET_FLAG(mon, FLAG_CAST_SPELL);	1328	SET_FLAG (mon, FLAG_CAST_SPELL);
1229	return;	1329	return;
1230	}	1330	}
1231		1331
1232	/* If for some reason, this item is already applied, no more work to do */	1332	/* If for some reason, this item is already applied, no more work to do */
1233	if(QUERY_FLAG(item,FLAG_APPLIED)) return;	1333	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;	1334	return;
1318	}
1319		1335
		1336	/* Might be better not to do this - if the monster can fire a bow,
		1337	* it is possible in his wanderings, he will find one to use. In
		1338	* which case, it would be nice to have ammo for it.
		1339	*/
		1340	if (QUERY_FLAG (mon, FLAG_USE_BOW) && item->type == ARROW)
		1341	{
		1342	/* Check for the right kind of bow */
		1343	object *bow;
		1344
		1345	for (bow = mon->inv; bow != NULL; bow = bow->below)
		1346	if (bow->type == BOW && bow->race == item->race)
		1347	{
		1348	SET_FLAG (mon, FLAG_READY_BOW);
		1349	LOG (llevMonster, "Found correct bow for arrows.\n");
		1350	return; /* nothing more to do for arrows */
		1351	}
		1352	}
		1353
		1354	if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE)
		1355	flag = 1;
		1356	/* Eating food gets hp back */
		1357	else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD)
		1358	flag = 1;
		1359	else if (item->type == SCROLL && QUERY_FLAG (mon, FLAG_USE_SCROLL))
		1360	{
		1361	if (!item->inv)
		1362	LOG (llevDebug, "Monster %d having scroll %d with empty inventory!", mon->count, item->count);
		1363	else if (monster_should_cast_spell (mon, item->inv))
		1364	SET_FLAG (mon, FLAG_READY_SCROLL);
		1365	/* Don't use it right now */
		1366	return;
		1367	}
		1368	else if (item->type == WEAPON)
		1369	flag = check_good_weapon (mon, item);
		1370	else if (IS_ARMOR (item))
		1371	flag = check_good_armour (mon, item);
		1372	/* Should do something more, like make sure this is a better item */
		1373	else if (item->type == RING)
		1374	flag = 1;
		1375	else if (item->type == WAND || item->type == ROD || item->type == HORN)
		1376	{
		1377	/* We never really 'ready' the wand/rod/horn, because that would mean the
		1378	* weapon would get undone.
		1379	*/
		1380	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
		1381	{
		1382	SET_FLAG (mon, FLAG_READY_RANGE);
		1383	SET_FLAG (item, FLAG_APPLIED);
		1384	}
		1385	return;
		1386	}
		1387	else if (item->type == BOW)
		1388	{
		1389	/* We never really 'ready' the bow, because that would mean the
		1390	* weapon would get undone.
		1391	*/
		1392	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
		1393	SET_FLAG (mon, FLAG_READY_BOW);
		1394	return;
		1395	}
		1396	else if (item->type == SKILL)
		1397	{
		1398	/*
		1399	* skills are specials: monsters must have the 'FLAG_READY_SKILL' flag set,
		1400	* else they can't use the skill...
		1401	* Skills also don't need to get applied, so return now.
		1402	*/
		1403	SET_FLAG (mon, FLAG_READY_SKILL);
		1404	return;
		1405	}
		1406
		1407
		1408	/* if we don't match one of the above types, return now.
		1409	* can_apply_object will say that we can apply things like flesh,
		1410	* bolts, and whatever else, because it only checks against the
		1411	* body_info locations.
		1412	*/
		1413	if (!flag)
		1414	return;
		1415
		1416	/* Check to see if the monster can use this item. If not, no need
		1417	* to do further processing. Note that can_apply_object already checks
		1418	* for the CAN_USE flags.
		1419	*/
		1420	if (can_apply_object (mon, item) & CAN_APPLY_NOT_MASK)
		1421	return;
		1422
		1423	/* should only be applying this item, not unapplying it.
		1424	* also, ignore status of curse so they can take off old armour.
		1425	* monsters have some advantages after all.
		1426	*/
		1427	manual_apply (mon, item, AP_APPLY | AP_IGNORE_CURSE);
		1428
		1429	return;
		1430	}
		1431
		1432	void
1320	void npc_call_help(object *op) {	1433	npc_call_help (object *op)
		1434	{
1321	int x,y, mflags;	1435	int x, y, mflags;
1322	object *npc;	1436	object *npc;
1323	sint16 sx, sy;	1437	sint16 sx, sy;
1324	mapstruct *m;	1438	mapstruct *m;
1325		1439
1326	for(x = -3; x < 4; x++)	1440	for (x = -3; x < 4; x++)
1327	for(y = -3; y < 4; y++) {	1441	for (y = -3; y < 4; y++)
		1442	{
1328	m = op->map;	1443	m = op->map;
1329	sx = op->x + x;	1444	sx = op->x + x;
1330	sy = op->y + y;	1445	sy = op->y + y;
1331	mflags = get_map_flags(m, &m, sx, sy, &sx, &sy);	1446	mflags = get_map_flags (m, &m, sx, sy, &sx, &sy);
1332	/* If nothing alive on this space, no need to search the space. */	1447	/* If nothing alive on this space, no need to search the space. */
1333	if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))	1448	if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))
1334	continue;	1449	continue;
1335		1450
1336	for(npc = get_map_ob(m,sx,sy);npc!=NULL;npc=npc->above)	1451	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))	1452	if (QUERY_FLAG (npc, FLAG_ALIVE) && QUERY_FLAG (npc, FLAG_UNAGGRESSIVE))
1338	npc->enemy = op->enemy;	1453	npc->enemy = op->enemy;
1339	}	1454	}
1340	}	1455	}
1341		1456
1342		1457
		1458	int
1343	int dist_att (int dir , object *ob, object *enemy, object *part, rv_vector *rv) {	1459	dist_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		1460	{
1344		1461
1345	if (can_hit(part,enemy,rv))	1462	if (can_hit (part, enemy, rv))
1346	return dir;	1463	return dir;
1347	if (rv->distance < 10)	1464	if (rv->distance < 10)
1348	return absdir(dir+4);	1465	return absdir (dir + 4);
1349	else if (rv->distance>18)	1466	else if (rv->distance > 18)
1350	return dir;	1467	return dir;
1351	return 0;	1468	return 0;
1352	}	1469	}
1353		1470
		1471	int
1354	int run_att (int dir, object *ob, object *enemy,object *part, rv_vector *rv) {	1472	run_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		1473	{
1355		1474
1356	if ((can_hit (part,enemy,rv) && ob->move_status <20) || ob->move_status <20) {	1475	if ((can_hit (part, enemy, rv) && ob->move_status < 20) || ob->move_status < 20)
		1476	{
1357	ob->move_status++;	1477	ob->move_status++;
1358	return (dir);	1478	return (dir);
1359	}	1479	}
1360	else if (ob->move_status >20)	1480	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;	1481	ob->move_status = 0;
		1482	return absdir (dir + 4);
		1483	}
		1484
		1485	int
		1486	hitrun_att (int dir, object *ob, object *enemy)
		1487	{
		1488	if (ob->move_status++ < 25)
1389	return 0;	1489	return dir;
1390	}	1490	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);	1491	return absdir (dir + 4);
1409	return 0;	1492	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;	1493	ob->move_status = 0;
1416	if (!(move_object(ob,circle[ob->move_status])))	1494	return absdir (dir + 4);
1417	(void) move_object(ob,RANDOM()%8+1);
1418	}	1495	}
1419		1496
		1497	int
		1498	wait_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		1499	{
		1500
		1501	int inrange = can_hit (part, enemy, rv);
		1502
		1503	if (ob->move_status || inrange)
		1504	ob->move_status++;
		1505
		1506	if (ob->move_status == 0)
		1507	return 0;
		1508	else if (ob->move_status < 10)
		1509	return dir;
		1510	else if (ob->move_status < 15)
		1511	return absdir (dir + 4);
		1512	ob->move_status = 0;
		1513	return 0;
		1514	}
		1515
		1516	int
		1517	disthit_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		1518	{
		1519
		1520	/* The logic below here looked plain wrong before. Basically, what should
		1521	* happen is that if the creatures hp percentage falls below run_away,
		1522	* the creature should run away (dir+4)
		1523	* I think its wrong for a creature to have a zero maxhp value, but
		1524	* at least one map has this set, and whatever the map contains, the
		1525	* server should try to be resilant enough to avoid the problem
		1526	*/
		1527	if (ob->stats.maxhp && (ob->stats.hp * 100) / ob->stats.maxhp < ob->run_away)
		1528	return absdir (dir + 4);
		1529	return dist_att (dir, ob, enemy, part, rv);
		1530	}
		1531
		1532	int
		1533	wait_att2 (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		1534	{
		1535	if (rv->distance < 9)
		1536	return absdir (dir + 4);
		1537	return 0;
		1538	}
		1539
		1540	void
1420	void circ2_move (object *ob) {	1541	circ1_move (object *ob)
		1542	{
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};	1543	static int circle[12] = { 3, 3, 4, 5, 5, 6, 7, 7, 8, 1, 1, 2 };
1422	if(++ob->move_status > 19)	1544	if (++ob->move_status > 11)
1423	ob->move_status = 0;	1545	ob->move_status = 0;
1424	if(!(move_object(ob,circle[ob->move_status])))	1546	if (!(move_object (ob, circle[ob->move_status])))
1425	(void) move_object(ob,RANDOM()%8+1);	1547	(void) move_object (ob, RANDOM () % 8 + 1);
1426	}	1548	}
1427		1549
		1550	void
		1551	circ2_move (object *ob)
		1552	{
		1553	static int circle[20] = { 3, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 1, 1, 1, 2, 2 };
		1554	if (++ob->move_status > 19)
		1555	ob->move_status = 0;
		1556	if (!(move_object (ob, circle[ob->move_status])))
		1557	(void) move_object (ob, RANDOM () % 8 + 1);
		1558	}
		1559
		1560	void
1428	void pace_movev(object *ob) {	1561	pace_movev (object *ob)
		1562	{
1429	if (ob->move_status++ > 6)	1563	if (ob->move_status++ > 6)
1430	ob->move_status = 0;	1564	ob->move_status = 0;
1431	if (ob->move_status < 4)	1565	if (ob->move_status < 4)
1432	(void) move_object (ob,5);	1566	(void) move_object (ob, 5);
1433	else	1567	else
1434	(void) move_object(ob,1);	1568	(void) move_object (ob, 1);
1435	}	1569	}
1436		1570
		1571	void
1437	void pace_moveh (object *ob) {	1572	pace_moveh (object *ob)
		1573	{
1438	if (ob->move_status++ > 6)	1574	if (ob->move_status++ > 6)
1439	ob->move_status = 0;	1575	ob->move_status = 0;
1440	if (ob->move_status < 4)	1576	if (ob->move_status < 4)
1441	(void) move_object(ob,3);	1577	(void) move_object (ob, 3);
1442	else	1578	else
1443	(void) move_object(ob,7);	1579	(void) move_object (ob, 7);
1444	}	1580	}
1445		1581
		1582	void
1446	void pace2_movev (object *ob) {	1583	pace2_movev (object *ob)
		1584	{
1447	if (ob->move_status ++ > 16)	1585	if (ob->move_status++ > 16)
1448	ob->move_status = 0;	1586	ob->move_status = 0;
1449	if (ob->move_status <6)	1587	if (ob->move_status < 6)
1450	(void) move_object (ob,5);	1588	(void) move_object (ob, 5);
1451	else if (ob->move_status < 8)	1589	else if (ob->move_status < 8)
1452	return;	1590	return;
1453	else if (ob->move_status <13)	1591	else if (ob->move_status < 13)
1454	(void) move_object (ob,1);	1592	(void) move_object (ob, 1);
		1593	else
1455	else return;	1594	return;
1456	}	1595	}
1457		1596
		1597	void
1458	void pace2_moveh (object *ob) {	1598	pace2_moveh (object *ob)
		1599	{
1459	if (ob->move_status ++ > 16)	1600	if (ob->move_status++ > 16)
1460	ob->move_status = 0;	1601	ob->move_status = 0;
1461	if (ob->move_status <6)	1602	if (ob->move_status < 6)
1462	(void) move_object (ob,3);	1603	(void) move_object (ob, 3);
1463	else if (ob->move_status < 8)	1604	else if (ob->move_status < 8)
1464	return;	1605	return;
1465	else if (ob->move_status <13)	1606	else if (ob->move_status < 13)
1466	(void) move_object (ob,7);	1607	(void) move_object (ob, 7);
		1608	else
1467	else return;	1609	return;
1468	}	1610	}
1469		1611
		1612	void
1470	void rand_move (object *ob) {	1613	rand_move (object *ob)
		1614	{
1471	int i;	1615	int i;
1472	if (ob->move_status <1 || ob->move_status >8 ||	1616
1473	!(move_object(ob,ob->move_status|| ! (RANDOM()% 9))))	1617	if (ob->move_status < 1 || ob->move_status > 8 || !(move_object (ob, ob->move_status || !(RANDOM () % 9))))
1474	for (i = 0; i < 5; i++)	1618	for (i = 0; i < 5; i++)
1475	if (move_object(ob,ob->move_status = RANDOM()%8+1))	1619	if (move_object (ob, ob->move_status = RANDOM () % 8 + 1))
1476	return;	1620	return;
1477	}	1621	}
1478		1622
		1623	void
1479	void check_earthwalls(object *op, mapstruct *m, int x, int y) {	1624	check_earthwalls (object *op, mapstruct *m, int x, int y)
		1625	{
1480	object *tmp;	1626	object *tmp;
		1627
1481	for (tmp = get_map_ob(m, x, y); tmp!=NULL; tmp=tmp->above) {	1628	for (tmp = get_map_ob (m, x, y); tmp != NULL; tmp = tmp->above)
		1629	{
1482	if (tmp->type == EARTHWALL) {	1630	if (tmp->type == EARTHWALL)
		1631	{
1483	hit_player(tmp,op->stats.dam,op,AT_PHYSICAL,1);	1632	hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1);
1484	return;	1633	return;
1485	}	1634	}
1486	}	1635	}
1487	}	1636	}
1488		1637
		1638	void
1489	void check_doors(object *op, mapstruct *m, int x, int y) {	1639	check_doors (object *op, mapstruct *m, int x, int y)
		1640	{
1490	object *tmp;	1641	object *tmp;
		1642
1491	for (tmp = get_map_ob(m, x, y); tmp!=NULL; tmp=tmp->above) {	1643	for (tmp = get_map_ob (m, x, y); tmp != NULL; tmp = tmp->above)
		1644	{
1492	if (tmp->type == DOOR) {	1645	if (tmp->type == DOOR)
		1646	{
1493	hit_player(tmp,1000,op,AT_PHYSICAL,1);	1647	hit_player (tmp, 1000, op, AT_PHYSICAL, 1);
1494	return;	1648	return;
1495	}	1649	}
1496	}	1650	}
1497	}	1651	}
1498		1652
1499	/* find_mon_throw_ob() - modeled on find_throw_ob	1653	/* find_mon_throw_ob() - modeled on find_throw_ob
…		…
1502	* furniture, even if they are not good throwable objects.	1656	* furniture, even if they are not good throwable objects.
1503	* Probably better to have the monster throw a throwable object	1657	* Probably better to have the monster throw a throwable object
1504	* first, then throw any non equipped weapon.	1658	* first, then throw any non equipped weapon.
1505	*/	1659	*/
1506		1660
		1661	object *
1507	object *find_mon_throw_ob( object *op ) {	1662	find_mon_throw_ob (object *op)
		1663	{
1508	object *tmp = NULL;	1664	object *tmp = NULL;
1509
1510	if(op->head) tmp=op->head; else tmp=op;
1511		1665
		1666	if (op->head)
		1667	tmp = op->head;
		1668	else
		1669	tmp = op;
		1670
1512	/* New throw code: look through the inventory. Grap the first legal is_thrown	1671	/* New throw code: look through the inventory. Grap the first legal is_thrown
1513	* marked item and throw it to the enemy.	1672	* marked item and throw it to the enemy.
1514	*/	1673	*/
1515		1674
1516	for(tmp=op->inv;tmp;tmp=tmp->below) {	1675	for (tmp = op->inv; tmp; tmp = tmp->below)
		1676	{
1517		1677
1518	/* Can't throw invisible objects or items that are applied */	1678	/* Can't throw invisible objects or items that are applied */
1519	if(tmp->invisible || QUERY_FLAG(tmp,FLAG_APPLIED)) continue;	1679	if (tmp->invisible || QUERY_FLAG (tmp, FLAG_APPLIED))
		1680	continue;
1520		1681
1521	if(QUERY_FLAG(tmp,FLAG_IS_THROWN))	1682	if (QUERY_FLAG (tmp, FLAG_IS_THROWN))
1522	break;	1683	break;
1523		1684
1524	}	1685	}
1525		1686
1526	#ifdef DEBUG_THROW	1687	#ifdef DEBUG_THROW
1527	LOG(llevDebug,"%s chooses to throw: %s (%d)\n",op->name,	1688	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	1689	#endif
1530		1690
1531	return tmp;	1691	return tmp;
1532	}	1692	}
1533		1693
1534	/* determine if we can 'detect' the enemy. Check for walls blocking the	1694	/* 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	1695	* 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.	1696	* enough (based on Wis & Int) to figure out where the enemy is. -b.t.
…		…
1539	* OR y distance being within some range - that seemed wrong - both should	1699	* OR y distance being within some range - that seemed wrong - both should
1540	* be within the valid range. MSW 2001-08-05	1700	* be within the valid range. MSW 2001-08-05
1541	* Returns 0 if enemy can not be detected, 1 if it is detected	1701	* Returns 0 if enemy can not be detected, 1 if it is detected
1542	*/	1702	*/
1543		1703
		1704	int
1544	int can_detect_enemy (object *op, object *enemy, rv_vector *rv) {	1705	can_detect_enemy (object *op, object *enemy, rv_vector * rv)
		1706	{
1545	int radius = MIN_MON_RADIUS, hide_discovery;	1707	int radius = MIN_MON_RADIUS, hide_discovery;
1546		1708
1547	/* null detection for any of these condtions always */	1709	/* null detection for any of these condtions always */
1548	if(!op || !enemy || !op->map || !enemy->map)	1710	if (!op || !enemy || !op->map || !enemy->map)
1549	return 0;	1711	return 0;
1550		1712
1551	/* If the monster (op) has no way to get to the enemy, do nothing */	1713	/* If the monster (op) has no way to get to the enemy, do nothing */
1552	if (!on_same_map(op, enemy))	1714	if (!on_same_map (op, enemy))
1553	return 0;	1715	return 0;
1554		1716
1555	get_rangevector(op, enemy, rv, 0);	1717	get_rangevector (op, enemy, rv, 0);
1556		1718
1557	/* Monsters always ignore the DM */	1719	/* Monsters always ignore the DM */
1558	if ( ( op->type != PLAYER ) && QUERY_FLAG( enemy, FLAG_WIZ ) )	1720	if ((op->type != PLAYER) && QUERY_FLAG (enemy, FLAG_WIZ))
1559	return 0;	1721	return 0;
1560		1722
1561	/* simple check. Should probably put some range checks in here. */	1723	/* simple check. Should probably put some range checks in here. */
1562	if(can_see_enemy(op,enemy)) return 1;	1724	if (can_see_enemy (op, enemy))
		1725	return 1;
1563		1726
1564	/* The rest of this is for monsters. Players are on their own for	1727	/* The rest of this is for monsters. Players are on their own for
1565	* finding enemies!	1728	* finding enemies!
1566	*/	1729	*/
1567	if(op->type==PLAYER) return 0;	1730	if (op->type == PLAYER)
		1731	return 0;
1568		1732
1569	/* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE	1733	/* 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	1734	* flag (which was already checked) in can_see_enmy (). Lets get out of here
1571	*/	1735	*/
1572	if(enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden)))	1736	if (enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden)))
1573	return 0;	1737	return 0;
1574		1738
1575	/* use this for invis also */	1739	/* use this for invis also */
1576	hide_discovery = op->stats.Int/5;	1740	hide_discovery = op->stats.Int / 5;
1577		1741
1578	/* Determine Detection radii */	1742	/* Determine Detection radii */
1579	if(!enemy->hide) /* to detect non-hidden (eg dark/invis enemy) */	1743	if (!enemy->hide) /* 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;	1744	radius = (op->stats.Wis / 5) + 1 > MIN_MON_RADIUS ? (op->stats.Wis / 5) + 1 : MIN_MON_RADIUS;
		1745	else
1581	else { /* a level/INT/Dex adjustment for hiding */	1746	{ /* a level/INT/Dex adjustment for hiding */
1582	object *sk_hide;	1747	object *sk_hide;
1583	int bonus = (op->level/2) + (op->stats.Int/5);	1748	int bonus = (op->level / 2) + (op->stats.Int / 5);
1584		1749
1585	if(enemy->type==PLAYER) {	1750	if (enemy->type == PLAYER)
		1751	{
1586	if((sk_hide = find_skill_by_number(enemy,SK_HIDING)))	1752	if ((sk_hide = find_skill_by_number (enemy, SK_HIDING)))
1587	bonus -= sk_hide->level;	1753	bonus -= sk_hide->level;
1588	else {	1754	else
		1755	{
1589	LOG(llevError,"can_detect_enemy() got hidden player w/o hiding skill!\n");	1756	LOG (llevError, "can_detect_enemy() got hidden player w/o hiding skill!\n");
1590	make_visible(enemy);	1757	make_visible (enemy);
1591	radius=radius<MIN_MON_RADIUS?MIN_MON_RADIUS:radius;	1758	radius = radius < MIN_MON_RADIUS ? MIN_MON_RADIUS : radius;
1592	}	1759	}
1593	}	1760	}
1594	else /* enemy is not a player */	1761	else /* enemy is not a player */
1595	bonus -= enemy->level;	1762	bonus -= enemy->level;
1596		1763
1597	radius += bonus/5;	1764	radius += bonus / 5;
1598	hide_discovery += bonus*5;	1765	hide_discovery += bonus * 5;
1599	} /* else creature has modifiers for hiding */	1766	} /* else creature has modifiers for hiding */
1600		1767
1601	/* Radii stealth adjustment. Only if you are stealthy	1768	/* Radii stealth adjustment. Only if you are stealthy
1602	* will you be able to sneak up closer to creatures */	1769	* will you be able to sneak up closer to creatures */
1603	if(QUERY_FLAG(enemy,FLAG_STEALTH))	1770	if (QUERY_FLAG (enemy, FLAG_STEALTH))
1604	radius = radius/2, hide_discovery = hide_discovery/3;	1771	radius = radius / 2, hide_discovery = hide_discovery / 3;
1605		1772
1606	/* Radii adjustment for enemy standing in the dark */	1773	/* Radii adjustment for enemy standing in the dark */
1607	if(op->map->darkness>0 && !stand_in_light(enemy)) {	1774	if (op->map->darkness > 0 && !stand_in_light (enemy))
		1775	{
1608	/* on dark maps body heat can help indicate location with infravision	1776	/* on dark maps body heat can help indicate location with infravision
1609	* undead don't have body heat, so no benefit detecting them.	1777	* undead don't have body heat, so no benefit detecting them.
1610	*/	1778	*/
1611	if(QUERY_FLAG(op,FLAG_SEE_IN_DARK) && !is_true_undead(enemy))	1779	if (QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !is_true_undead (enemy))
1612	radius += op->map->darkness/2;	1780	radius += op->map->darkness / 2;
1613	else	1781	else
1614	radius -= op->map->darkness/2;	1782	radius -= op->map->darkness / 2;
1615		1783
1616	/* op next to a monster (and not in complete darkness)	1784	/* op next to a monster (and not in complete darkness)
1617	* the monster should have a chance to see you.	1785	* the monster should have a chance to see you.
1618	*/	1786	*/
1619	if(radius<MIN_MON_RADIUS && op->map->darkness<5 && rv->distance<=1)	1787	if (radius < MIN_MON_RADIUS && op->map->darkness < 5 && rv->distance <= 1)
1620	radius = MIN_MON_RADIUS;	1788	radius = MIN_MON_RADIUS;
1621	} /* if on dark map */	1789	} /* if on dark map */
1622		1790
1623	/* Lets not worry about monsters that have incredible detection	1791	/* Lets not worry about monsters that have incredible detection
1624	* radii, we only need to worry here about things the player can	1792	* 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	1793	* (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	1794	* may have for their map - in that way, creatures at the edge will
1627	* do something. Note that the distance field in the	1795	* do something. Note that the distance field in the
1628	* vector is real distance, so in theory this should be 18 to	1796	* vector is real distance, so in theory this should be 18 to
1629	* find that.	1797	* find that.
1630	*/	1798	*/
1631	if(radius>13) radius = 13;	1799	if (radius > 13)
		1800	radius = 13;
1632		1801
1633	/* Enemy in range! Now test for detection */	1802	/* Enemy in range! Now test for detection */
1634	if ((int) rv->distance <= radius) {	1803	if ((int) rv->distance <= radius)
		1804	{
1635	/* ah, we are within range, detected? take cases */	1805	/* ah, we are within range, detected? take cases */
1636	if(!enemy->invisible) /* enemy in dark squares... are seen! */	1806	if (!enemy->invisible) /* enemy in dark squares... are seen! */
1637	return 1;	1807	return 1;
1638		1808
1639	/* hidden or low-quality invisible */	1809	/* hidden or low-quality invisible */
1640	if(enemy->hide && (rv->distance <= 1) && (RANDOM()%100<=hide_discovery)) {	1810	if (enemy->hide && (rv->distance <= 1) && (RANDOM () % 100 <= hide_discovery))
		1811	{
1641	make_visible(enemy);	1812	make_visible (enemy);
1642	/* inform players of new status */	1813	/* inform players of new status */
1643	if(enemy->type==PLAYER && player_can_view(enemy,op))	1814	if (enemy->type == PLAYER && player_can_view (enemy, op))
1644	new_draw_info_format(NDI_UNIQUE,0, enemy,	1815	new_draw_info_format (NDI_UNIQUE, 0, enemy, "You are discovered by %s!", &op->name);
1645	"You are discovered by %s!",&op->name);
1646	return 1; /* detected enemy */	1816	return 1; /* detected enemy */
1647	}	1817	}
1648	else if (enemy->invisible) {	1818	else if (enemy->invisible)
		1819	{
1649	/* Change this around - instead of negating the invisible, just	1820	/* Change this around - instead of negating the invisible, just
1650	* return true so that the mosnter that managed to detect you can	1821	* return true so that the mosnter that managed to detect you can
1651	* do something to you. Decreasing the duration of invisible	1822	* do something to you. Decreasing the duration of invisible
1652	* doesn't make a lot of sense IMO, as a bunch of stupid creatures	1823	* 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 -	1824	* can then basically negate the spell. The spell isn't negated -
1654	* they just know where you are!	1825	* they just know where you are!
1655	*/	1826	*/
1656	if ((RANDOM() % 50) <= hide_discovery) {	1827	if ((RANDOM () % 50) <= hide_discovery)
		1828	{
1657	if (enemy->type == PLAYER) {	1829	if (enemy->type == PLAYER)
1658	new_draw_info_format(NDI_UNIQUE,0, enemy,	1830	{
1659	"You see %s noticing your position.", query_name(op));	1831	new_draw_info_format (NDI_UNIQUE, 0, enemy, "You see %s noticing your position.", query_name (op));
1660	}	1832	}
1661	return 1;	1833	return 1;
1662	}	1834	}
1663	}	1835	}
1664	} /* within range */	1836	} /* within range */
1665		1837
1666	/* Wasn't detected above, so still hidden */	1838	/* Wasn't detected above, so still hidden */
1667	return 0;	1839	return 0;
1668	}	1840	}
1669		1841
1670	/* determine if op stands in a lighted square. This is not a very	1842	/* 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	1843	* intellegent algorithm. For one thing, we ignore los here, SO it
1672	* is possible for a bright light to illuminate a player on the	1844	* is possible for a bright light to illuminate a player on the
1673	* other side of a wall (!).	1845	* other side of a wall (!).
1674	*/	1846	*/
1675		1847
		1848	int
1676	int stand_in_light( object *op) {	1849	stand_in_light (object *op)
		1850	{
1677	sint16 nx,ny;	1851	sint16 nx, ny;
1678	mapstruct *m;	1852	mapstruct *m;
1679		1853
1680		1854
		1855	if (!op)
1681	if(!op) return 0;	1856	return 0;
1682	if(op->glow_radius > 0) return 1;	1857	if (op->glow_radius > 0)
		1858	return 1;
1683		1859
1684	if(op->map) {	1860	if (op->map)
		1861	{
1685	int x, y, x1, y1;	1862	int x, y, x1, y1;
1686
1687
1688		1863
		1864
		1865
1689	/* Check the spaces with the max light radius to see if any of them	1866	/* 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.	1867	* have lights, and if any of them light the player enough, then return 1.
1691	*/	1868	*/
1692	for (x = op->x - MAX_LIGHT_RADII; x <= op->x + MAX_LIGHT_RADII; x++) {	1869	for (x = op->x - MAX_LIGHT_RADII; x <= op->x + MAX_LIGHT_RADII; x++)
		1870	{
1693	for (y = op->y - MAX_LIGHT_RADII; y <= op->y + MAX_LIGHT_RADII; y++) {	1871	for (y = op->y - MAX_LIGHT_RADII; y <= op->y + MAX_LIGHT_RADII; y++)
		1872	{
1694	m = op->map;	1873	m = op->map;
1695	nx = x;	1874	nx = x;
1696	ny = y;	1875	ny = y;
1697		1876
1698	if (get_map_flags(m, &m, nx, ny, &nx, &ny) & P_OUT_OF_MAP) continue;	1877	if (get_map_flags (m, &m, nx, ny, &nx, &ny) & P_OUT_OF_MAP)
		1878	continue;
1699		1879
1700	x1 = abs(x - op->x)*abs(x - op->x);	1880	x1 = abs (x - op->x) * abs (x - op->x);
1701	y1 = abs(y - op->y)*abs(y - op->y);	1881	y1 = abs (y - op->y) * abs (y - op->y);
1702	if (isqrt(x1 + y1) < GET_MAP_LIGHT(m, nx, ny)) return 1;	1882	if (isqrt (x1 + y1) < GET_MAP_LIGHT (m, nx, ny))
		1883	return 1;
1703	}	1884	}
1704	}	1885	}
1705	}	1886	}
1706	return 0;	1887	return 0;
1707	}	1888	}
1708		1889
1709		1890
1710	/* assuming no walls/barriers, lets check to see if its *possible*	1891	/* assuming no walls/barriers, lets check to see if its *possible*
1711	* to see an enemy. Note, "detection" is different from "seeing".	1892	* to see an enemy. Note, "detection" is different from "seeing".
1712	* See can_detect_enemy() for more details. -b.t.	1893	* See can_detect_enemy() for more details. -b.t.
1713	* return 0 if can't be seen, 1 if can be	1894	* return 0 if can't be seen, 1 if can be
1714	*/	1895	*/
1715		1896
		1897	int
1716	int can_see_enemy (object *op, object *enemy) {	1898	can_see_enemy (object *op, object *enemy)
		1899	{
1717	object *looker = op->head?op->head:op;	1900	object *looker = op->head ? op->head : op;
1718		1901
1719	/* safety */	1902	/* safety */
1720	if(!looker||!enemy||!QUERY_FLAG(looker,FLAG_ALIVE))	1903	if (!looker || !enemy || !QUERY_FLAG (looker, FLAG_ALIVE))
1721	return 0;	1904	return 0;
1722		1905
1723	/* we dont give a full treatment of xrays here (shorter range than normal,	1906	/* 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	1907	* see through walls). Should we change the code elsewhere to make you
1725	* blind even if you can xray?	1908	* blind even if you can xray?
1726	*/	1909	*/
1727	if(QUERY_FLAG(looker,FLAG_BLIND) && !QUERY_FLAG(looker,FLAG_XRAYS))	1910	if (QUERY_FLAG (looker, FLAG_BLIND) && !QUERY_FLAG (looker, FLAG_XRAYS))
		1911	return 0;
		1912
		1913	/* checking for invisible things */
		1914	if (enemy->invisible)
		1915	{
		1916	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!
		1917	* However,if you carry any source of light, then the hidden
		1918	* creature is seeable (and stupid) */
		1919
		1920	if (has_carried_lights (enemy))
		1921	{
		1922	if (enemy->hide)
		1923	{
		1924	make_visible (enemy);
		1925	new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!");
		1926	}
		1927	return 1;
		1928	}
		1929	else if (enemy->hide)
		1930	return 0;
		1931
		1932	/* Invisible enemy. Break apart the check for invis undead/invis looker
		1933	* into more simple checks - the QUERY_FLAG doesn't return 1/0 values,
		1934	* and making it a conditional makes the code pretty ugly.
		1935	*/
		1936	if (!QUERY_FLAG (looker, FLAG_SEE_INVISIBLE))
		1937	{
		1938	if (makes_invisible_to (enemy, looker))
1728	return 0;	1939	return 0;
1729
1730	/* checking for invisible things */
1731	if(enemy->invisible) {
1732	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!
1733	* However,if you carry any source of light, then the hidden
1734	* creature is seeable (and stupid) */
1735
1736	if(has_carried_lights(enemy)) {
1737	if(enemy->hide) {
1738	make_visible(enemy);
1739	new_draw_info(NDI_UNIQUE,0, enemy,
1740	"Your light reveals your hiding spot!");
1741	}	1940	}
1742	return 1;	1941	}
1743	} else if (enemy->hide) return 0;
1744
1745	/* 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,
1747	* and making it a conditional makes the code pretty ugly.
1748	*/
1749	if (!QUERY_FLAG(looker,FLAG_SEE_INVISIBLE)) {
1750	if (makes_invisible_to(enemy, looker)) return 0;
1751	}
1752	} else if(looker->type==PLAYER) /* for players, a (possible) shortcut */	1942	else if (looker->type == PLAYER) /* for players, a (possible) shortcut */
1753	if(player_can_view(looker,enemy)) return 1;	1943	if (player_can_view (looker, enemy))
		1944	return 1;
1754		1945
1755	/* ENEMY IN DARK MAP. Without infravision, the enemy is not seen	1946	/* ENEMY IN DARK MAP. Without infravision, the enemy is not seen
1756	* unless they carry a light or stand in light. Darkness doesnt	1947	* unless they carry a light or stand in light. Darkness doesnt
1757	* inhibit the undead per se (but we should give their archs	1948	* inhibit the undead per se (but we should give their archs
1758	* CAN_SEE_IN_DARK, this is just a safety	1949	* CAN_SEE_IN_DARK, this is just a safety
1759	* we care about the enemy maps status, not the looker.	1950	* we care about the enemy maps status, not the looker.
1760	* only relevant for tiled maps, but it is possible that the	1951	* 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	1952	* enemy is on a bright map and the looker on a dark - in that
1762	* case, the looker can still see the enemy	1953	* case, the looker can still see the enemy
1763	*/	1954	*/
1764	if(enemy->map->darkness>0&&!stand_in_light(enemy)	1955	if (enemy->map->darkness > 0 && !stand_in_light (enemy)
1765	&&(!QUERY_FLAG(looker,FLAG_SEE_IN_DARK)||	1956	&& (!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;	1957	return 0;
1768		1958
1769	return 1;	1959	return 1;
1770	}	1960	}
1771

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