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Comparing deliantra/server/server/monster.C (file contents):
Revision 1.4 by root, Tue Aug 29 08:01:37 2006 UTC vs.
Revision 1.90 by root, Sat May 15 23:41:06 2010 UTC

1	/*	1	/*
2	* static char *rcsid_monster_c =	2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	* "$Id: monster.C,v 1.4 2006/08/29 08:01:37 root Exp $";	3	*
		4	* Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
		5	* Copyright (©) 2002 Mark Wedel & Crossfire Development Team
		6	* Copyright (©) 1992 Frank Tore Johansen
		7	*
		8	* Deliantra is free software: you can redistribute it and/or modify it under
		9	* the terms of the Affero GNU General Public License as published by the
		10	* Free Software Foundation, either version 3 of the License, or (at your
		11	* option) any later version.
		12	*
		13	* This program is distributed in the hope that it will be useful,
		14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		16	* GNU General Public License for more details.
		17	*
		18	* You should have received a copy of the Affero GNU General Public License
		19	* and the GNU General Public License along with this program. If not, see
		20	* <http://www.gnu.org/licenses/>.
		21	*
		22	* The authors can be reached via e-mail to <support@deliantra.net>
4	*/	23	*/
5		24
6	/*	25	//+GPL
7	CrossFire, A Multiplayer game for X-windows
8
9	Copyright (C) 2002 Mark Wedel & Crossfire Development Team
10	Copyright (C) 1992 Frank Tore Johansen
11
12	This program is free software; you can redistribute it and/or modify
13	it under the terms of the GNU General Public License as published by
14	the Free Software Foundation; either version 2 of the License, or
15	(at your option) any later version.
16
17	This program is distributed in the hope that it will be useful,
18	but WITHOUT ANY WARRANTY; without even the implied warranty of
19	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20	GNU General Public License for more details.
21
22	You should have received a copy of the GNU General Public License
23	along with this program; if not, write to the Free Software
24	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25
26	The authors can be reached via e-mail at crossfire-devel@real-time.com
27	*/
28		26
29	#include <global.h>	27	#include <global.h>
30	#ifndef __CEXTRACT__
31	#include <sproto.h>	28	#include <sproto.h>
32	#include <spells.h>	29	#include <spells.h>
33	#include <skills.h>	30	#include <skills.h>
34	#endif
35		31
36
37	#define MIN_MON_RADIUS 3 /* minimum monster detection radius */	32	#define MIN_MON_RADIUS 3 /* minimum monster detection radius */
38
39		33
40	/* checks npc->enemy and returns that enemy if still valid,	34	/* checks npc->enemy and returns that enemy if still valid,
41	* NULL otherwise.	35	* NULL otherwise.
42	* this is map tile aware.	36	* this is map tile aware.
43	* If this returns an enemy, the range vector rv should also be	37	* If this returns an enemy, the range vector rv should also be
44	* set to sane values.	38	* set to sane values.
45	*/	39	*/
		40	object *
46	object *check_enemy(object *npc, rv_vector *rv) {	41	check_enemy (object *npc, rv_vector * rv)
47		42	{
48	/* if this is pet, let him attack the same enemy as his owner	43	/* if this is pet, let him attack the same enemy as his owner
49	* TODO: when there is no ower enemy, try to find a target,	44	* TODO: when there is no ower enemy, try to find a target,
50	* which CAN attack the owner. */	45	* which CAN attack the owner. */
51	if ((npc->attack_movement & HI4) == PETMOVE)	46	if ((npc->attack_movement & HI4) == PETMOVE)
52	{	47	{
53	if (npc->owner == NULL)	48	if (npc->owner == NULL)
54	npc->enemy = NULL;	49	npc->enemy = NULL;
55	else if (npc->enemy == NULL)	50	else if (npc->enemy == NULL)
56	npc->enemy = npc->owner->enemy;	51	npc->enemy = npc->owner->enemy;
57	}	52	}
58		53
59	/* periodically, a monster mayu change its target. Also, if the object	54	/* periodically, a monster may change its target. Also, if the object
60	* has been destroyed, etc, clear the enemy.	55	* has been destroyed, etc, clear the enemy.
61	* TODO: this should be changed, because it invokes to attack forced or	56	* TODO: this should be changed, because it invokes to attack forced or
62	* attacked monsters to leave the attacker alone, before it is destroyed	57	* attacked monsters to leave the attacker alone, before it is destroyed
63	*/	58	*/
64	/* i had removed the random target leave, this invokes problems with friendly	59	/* I had removed the random target leave, this invokes problems with friendly
65	* objects, getting attacked and defending herself - they don't try to attack	60	* objects, getting attacked and defending herself - they don't try to attack
66	* again then but perhaps get attack on and on	61	* again then but perhaps get attack on and on
67	* If we include a aggravated flag in , we can handle evil vs evil and good vs good	62	* If we include a aggravated flag in , we can handle evil vs evil and good vs good
68	* too. */	63	* too. */
69		64
70	if(npc->enemy)	65	if (npc->enemy)
71	{	66	{
72	/* I broke these if's apart to better be able to see what	67	/* I broke these if's apart to better be able to see what
73	* the grouping checks are. Code is the same.	68	* the grouping checks are. Code is the same.
74	*/	69	*/
75	if ( QUERY_FLAG(npc->enemy,FLAG_REMOVED) ||	70	if (npc->enemy->flag [FLAG_REMOVED] ||
76	QUERY_FLAG(npc->enemy,FLAG_FREED) ||	71	npc->enemy->flag [FLAG_FREED] ||
77	!on_same_map(npc, npc->enemy) ||	72	!on_same_map (npc, npc->enemy) || npc == npc->enemy || npc->flag [FLAG_NEUTRAL] || npc->enemy->flag [FLAG_NEUTRAL])
78	npc == npc->enemy ||
79	QUERY_FLAG(npc, FLAG_NEUTRAL) ||
80	QUERY_FLAG(npc->enemy, FLAG_NEUTRAL))
81	npc->enemy = NULL;	73	npc->enemy = 0;
82		74
83	else if (QUERY_FLAG(npc, FLAG_FRIENDLY) && (	75	else if (npc->flag [FLAG_FRIENDLY] && ((npc->enemy->flag [FLAG_FRIENDLY]
84	(QUERY_FLAG(npc->enemy, FLAG_FRIENDLY) && !(should_arena_attack(npc, npc->owner, npc->enemy))) ||	76	&& !(should_arena_attack (npc, npc->owner, npc->enemy)))
85	((npc->enemy->type == PLAYER) && !(should_arena_attack(npc, npc->owner, npc->enemy)))	77	|| ((npc->enemy->type == PLAYER) && !(should_arena_attack (npc, npc->owner, npc->enemy)))
86	|| npc->enemy == npc->owner))	78	|| npc->enemy == npc->owner))
87	npc->enemy = NULL;	79	npc->enemy = 0;
88
89
90	else if (!QUERY_FLAG(npc, FLAG_FRIENDLY) &&
91	(!QUERY_FLAG(npc->enemy, FLAG_FRIENDLY) && npc->enemy->type!=PLAYER))
92	npc->enemy=NULL;
93		80
		81
		82	else if (!npc->flag [FLAG_FRIENDLY] && (!npc->enemy->flag [FLAG_FRIENDLY] && npc->enemy->type != PLAYER))
		83	npc->enemy = 0;
		84
94	/* I've noticed that pets could sometimes get an arrow as the	85	/* I've noticed that pets could sometimes get an arrow as the
95	* target enemy - this code below makes sure the enemy is something	86	* target enemy - this code below makes sure the enemy is something
96	* that should be attacked. My guess is that the arrow hits	87	* that should be attacked. My guess is that the arrow hits
97	* the creature/owner, and so the creature then takes that	88	* the creature/owner, and so the creature then takes that
98	* as the enemy to attack.	89	* as the enemy to attack.
99	*/	90	*/
100	else if (!QUERY_FLAG(npc->enemy, FLAG_MONSTER) &&	91	else if (!npc->enemy->flag [FLAG_MONSTER]
101	!QUERY_FLAG(npc->enemy,FLAG_GENERATOR) &&	92	&& !npc->enemy->flag [FLAG_GENERATOR]
102	npc->enemy->type!=PLAYER && npc->enemy->type != GOLEM)	93	&& npc->enemy->type != PLAYER
103	npc->enemy=NULL;	94	&& npc->enemy->type != GOLEM)
104		95	npc->enemy = 0;
105	}	96	}
		97
106	return can_detect_enemy(npc,npc->enemy,rv)?npc->enemy:NULL;	98	return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : 0;
107	}	99	}
108		100
109	/* Returns the nearest living creature (monster or generator).	101	/* Returns the nearest living creature (monster or generator).
110	* Modified to deal with tiled maps properly.	102	* Modified to deal with tiled maps properly.
111	* Also fixed logic so that monsters in the lower directions were more	103	* Also fixed logic so that monsters in the lower directions were more
…		…
118	* the first few directions, it could very well choose something	110	* the first few directions, it could very well choose something
119	* 3 spaces away even though something directly north is closer.	111	* 3 spaces away even though something directly north is closer.
120	*	112	*
121	* this function is map tile aware.	113	* this function is map tile aware.
122	*/	114	*/
		115	object *
123	object *find_nearest_living_creature(object *npc) {	116	find_nearest_living_creature (object *npc)
		117	{
124	int i,mflags;	118	int i, mflags;
125	sint16 nx,ny;	119	sint16 nx, ny;
126	mapstruct *m;	120	maptile *m;
127	object *tmp;
128	int search_arr[SIZEOFFREE];	121	int search_arr[SIZEOFFREE];
129		122
130	get_search_arr(search_arr);	123	get_search_arr (search_arr);
		124
131	for(i=0;i<SIZEOFFREE;i++) {	125	for (i = 0; i < SIZEOFFREE; i++)
		126	{
132	/* modified to implement smart searching using search_arr	127	/* modified to implement smart searching using search_arr
133	* guidance array to determine direction of search order	128	* guidance array to determine direction of search order
134	*/	129	*/
135	nx = npc->x + freearr_x[search_arr[i]];	130	nx = npc->x + freearr_x[search_arr[i]];
136	ny = npc->y + freearr_y[search_arr[i]];	131	ny = npc->y + freearr_y[search_arr[i]];
137	m = npc->map;	132	m = npc->map;
138		133
139	mflags = get_map_flags(m, &m, nx, ny, &nx, &ny);	134	mflags = get_map_flags (m, &m, nx, ny, &nx, &ny);
		135
140	if (mflags & P_OUT_OF_MAP) continue;	136	if (mflags & P_OUT_OF_MAP)
		137	continue;
141		138
142	if (mflags & P_IS_ALIVE) {	139	if (mflags & P_IS_ALIVE)
143	tmp=get_map_ob(m,nx,ny);	140	{
144	while(tmp!=NULL && !QUERY_FLAG(tmp,FLAG_MONSTER)&&	141	for (object *tmp = m->at (nx, ny).top; tmp; tmp = tmp->below)
145	!QUERY_FLAG(tmp,FLAG_GENERATOR ) && tmp->type!=PLAYER)	142	if (tmp->flag [FLAG_MONSTER] || tmp->flag [FLAG_GENERATOR] || tmp->type == PLAYER)
146	tmp=tmp->above;
147
148	if (!tmp) {
149	LOG(llevDebug,"find_nearest_living_creature: map %s (%d,%d) has is_alive set but did not find a monster?\n",
150	m->path, nx, ny);
151	}
152	else {
153	if(can_see_monsterP(m,nx,ny,i))	143	if (can_see_monsterP (m, nx, ny, i))
154	return tmp;	144	return tmp;
155	}	145	}
156	} /* is something living on this space */
157	}	146	}
158	return NULL; /* nothing found */
159	}
160		147
		148	return 0;
		149	}
161		150
162	/* Tries to find an enmy for npc. We pass the range vector since	151	/* Tries to find an enemy for npc. We pass the range vector since
163	* our caller will find the information useful.	152	* our caller will find the information useful.
164	* Currently, only move_monster calls this function.	153	* Currently, only move_monster calls this function.
165	* Fix function so that we always make calls to get_rangevector	154	* Fix function so that we always make calls to get_rangevector
166	* if we have a valid target - function as not doing so in	155	* if we have a valid target - function as not doing so in
167	* many cases.	156	* many cases.
168	*/	157	*/
169		158	static object *
170	object *find_enemy(object *npc, rv_vector *rv)	159	find_enemy (object *npc, rv_vector * rv)
171	{	160	{
172	object *attacker, *tmp=NULL;	161	object *attacker, *tmp = NULL;
173		162
174	attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */	163	attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */
175	npc->attacked_by = NULL; /* always clear the attacker entry */	164	npc->attacked_by = 0; /* always clear the attacker entry */
176		165
177	/* if we berserk, we don't care about others - we attack all we can find */	166	/* if we berserk, we don't care about others - we attack all we can find */
178	if(QUERY_FLAG(npc,FLAG_BERSERK)) {	167	if (npc->flag [FLAG_BERSERK])
		168	{
179	tmp = find_nearest_living_creature(npc);	169	tmp = find_nearest_living_creature (npc);
		170
		171	if (tmp)
180	if (tmp) get_rangevector(npc, tmp, rv, 0);	172	get_rangevector (npc, tmp, rv, 0);
		173
181	return tmp;	174	return tmp;
182	}	175	}
183		176
184	/* Here is the main enemy selection.	177	/* Here is the main enemy selection.
185	* We want this: if there is an enemy, attack him until its not possible or	178	* We want this: if there is an enemy, attack him until its not possible or
186	* one of both is dead.	179	* one of both is dead.
187	* If we have no enemy and we are...	180	* If we have no enemy and we are...
188	* a monster: try to find a player, a pet or a friendly monster	181	* a monster: try to find a player, a pet or a friendly monster
189	* a friendly: only target a monster which is targeting you first or targeting a player	182	* a friendly: only target a monster which is targeting you first or targeting a player
190	* a neutral: fight a attacker (but there should be none), then do nothing	183	* a neutral: fight a attacker (but there should be none), then do nothing
191	* a pet: attack player enemy or a monster	184	* a pet: attack player enemy or a monster
192	*/	185	*/
193		186
194	/* pet move */	187	/* pet move */
195	if ((npc->attack_movement & HI4) == PETMOVE) {	188	if ((npc->attack_movement & HI4) == PETMOVE)
		189	{
196	tmp= get_pet_enemy(npc,rv);	190	tmp = get_pet_enemy (npc, rv);
		191
		192	if (tmp)
197	if (tmp) get_rangevector(npc, tmp, rv, 0);	193	get_rangevector (npc, tmp, rv, 0);
		194
198	return tmp;	195	return tmp;
199	}
200		196	}
		197
201	/* we check our old enemy. */	198	/* we check our old enemy. */
202	if((tmp=check_enemy(npc, rv))==NULL)	199	if (!(tmp = check_enemy (npc, rv)))
203	{	200	{
204	if(attacker) /* if we have an attacker, check him */	201	if (attacker) /* if we have an attacker, check him */
205	{	202	{
206	/* we want be sure this is the right one! */	203	/* TODO: that's not finished */
207	if(attacker->count == npc->attacked_by_count)	204	/* we don't want a fight evil vs evil or good against non evil */
		205
		206	if (npc->flag [FLAG_NEUTRAL] || attacker->flag [FLAG_NEUTRAL] || /* neutral */
		207	(npc->flag [FLAG_FRIENDLY] && attacker->flag [FLAG_FRIENDLY]) ||
		208	(!npc->flag [FLAG_FRIENDLY] && (!attacker->flag [FLAG_FRIENDLY] && attacker->type != PLAYER)))
		209	npc->clr_flag (FLAG_SLEEP); /* skip it, but lets wakeup */
		210	else if (on_same_map (npc, attacker)) /* that's the only thing we must know... */
208	{	211	{
209	/* TODO: thats not finished */
210	/* we don't want a fight evil vs evil or good against non evil */
211
212	if( QUERY_FLAG(npc, FLAG_NEUTRAL) || QUERY_FLAG(attacker, FLAG_NEUTRAL) || /* neutral */
213	(QUERY_FLAG(npc, FLAG_FRIENDLY) && QUERY_FLAG(attacker, FLAG_FRIENDLY)) ||
214	(!QUERY_FLAG(npc, FLAG_FRIENDLY) &&
215	(!QUERY_FLAG(attacker, FLAG_FRIENDLY) && attacker->type!=PLAYER)) )
216	CLEAR_FLAG(npc,FLAG_SLEEP); /* skip it, but lets wakeup */
217	else if(on_same_map(npc, attacker)) /* thats the only thing we must know... */
218	{
219	CLEAR_FLAG(npc,FLAG_SLEEP); /* well, NOW we really should wake up! */	212	npc->clr_flag (FLAG_SLEEP); /* well, NOW we really should wake up! */
220	npc->enemy = attacker;	213	npc->enemy = attacker;
221	return attacker; /* yes, we face our attacker! */	214	return attacker; /* yes, we face our attacker! */
222	}
223	}	215	}
224	}	216	}
225		217
226	/* we have no legal enemy or attacker, so we try to target a new one */	218	/* we have no legal enemy or attacker, so we try to target a new one */
227	if(!QUERY_FLAG(npc, FLAG_UNAGGRESSIVE) && !QUERY_FLAG(npc, FLAG_FRIENDLY) &&	219	if (!npc->flag [FLAG_UNAGGRESSIVE] && !npc->flag [FLAG_FRIENDLY] && !npc->flag [FLAG_NEUTRAL])
228	!QUERY_FLAG(npc, FLAG_NEUTRAL))
229	{	220	{
230	npc->enemy = get_nearest_player(npc);	221	npc->enemy = get_nearest_player (npc);
231	if (npc->enemy)	222	if (npc->enemy)
232	tmp = check_enemy(npc,rv);	223	tmp = check_enemy (npc, rv);
233	}
234		224	}
235	}
236		225
		226	}
		227
237	return tmp;	228	return tmp;
238	}	229	}
239		230
240	/* Sees if this monster should wake up.	231	/* Sees if this monster should wake up.
241	* Currently, this is only called from move_monster, and	232	* Currently, this is only called from move_monster, and
242	* if enemy is set, then so should be rv.	233	* if enemy is set, then so should be rv.
243	* returns 1 if the monster should wake up, 0 otherwise.	234	* returns 1 if the monster should wake up, 0 otherwise.
244	*/	235	*/
245		236	static int
246	int check_wakeup(object *op, object *enemy, rv_vector *rv) {	237	check_wakeup (object *op, object *enemy, rv_vector *rv)
247	int radius = op->stats.Wis>MIN_MON_RADIUS?op->stats.Wis:MIN_MON_RADIUS;	238	{
248
249	/* Trim work - if no enemy, no need to do anything below */	239	/* Trim work - if no enemy, no need to do anything below */
250	if (!enemy) return 0;	240	if (!enemy)
		241	return 0;
251		242
		243	if (!op->flag [FLAG_SLEEP])
		244	return 1;
		245
		246	int radius = max (op->stats.Wis, MIN_MON_RADIUS);
		247
		248	if (op->flag [FLAG_BLIND])
252	/* blinded monsters can only find nearby objects to attack */	249	/* blinded monsters can only find nearby objects to attack */
253	if(QUERY_FLAG(op, FLAG_BLIND))
254	radius = MIN_MON_RADIUS;	250	radius = MIN_MON_RADIUS;
255		251	else if (op->map
		252	&& !enemy->invisible
		253	&& !stand_in_light (enemy)
		254	&& (!op->flag[FLAG_SEE_IN_DARK] || !op->flag [FLAG_SEE_INVISIBLE]))
256	/* This covers the situation where the monster is in the dark	255	/* This covers the situation where the monster is in the dark
257	* and has an enemy. If the enemy has no carried light (or isnt	256	* and has an enemy. If the enemy has no carried light (or isnt
258	* glowing!) then the monster has trouble finding the enemy.	257	* glowing!) then the monster has trouble finding the enemy.
259	* Remember we already checked to see if the monster can see in	258	* Remember we already checked to see if the monster can see in
260	* the dark. */	259	* the dark. */
		260	radius = min (radius, MIN_MON_RADIUS + MAX_DARKNESS - op->map->darklevel ());
261		261
262	else if(op->map && op->map->darkness>0 && enemy && !enemy->invisible &&	262	if (enemy->flag [FLAG_STEALTH])
263	!stand_in_light(enemy) &&	263	radius = radius / 2 + 1;
264	(!QUERY_FLAG(op,FLAG_SEE_IN_DARK) || !QUERY_FLAG(op,FLAG_SEE_INVISIBLE))) {
265	int dark = radius/(op->map->darkness);
266	radius = (dark>MIN_MON_RADIUS)?(dark+1):MIN_MON_RADIUS;
267	}
268	else if(!QUERY_FLAG(op,FLAG_SLEEP)) return 1;
269		264
270	/* enemy should already be on this map, so don't really need to check	265	/* enemy should already be on this map, so don't really need to check
271	* for that.	266	* for that.
272	*/	267	*/
273	if (rv->distance < (QUERY_FLAG(enemy, FLAG_STEALTH)?(radius/2)+1:radius)) {	268	if (rv->distance <= radius)
274	CLEAR_FLAG(op,FLAG_SLEEP);	269	{
		270	op->clr_flag (FLAG_SLEEP);
275	return 1;	271	return 1;
276	}	272	}
		273
277	return 0;	274	return 0;
278	}	275	}
279		276
		277	static int
280	int move_randomly(object *op) {	278	move_randomly (object *op)
281	int i;	279	{
282
283	/* Give up to 15 chances for a monster to move randomly */	280	/* Give up to 15 chances for a monster to move randomly */
284	for(i=0;i<15;i++) {	281	for (int i = 0; i < 15; i++)
285	if(move_object(op,RANDOM()%8+1))	282	if (op->move (rndm (8) + 1))
286	return 1;	283	return 1;
287	}	284
288	return 0;	285	return 0;
289	}	286	}
290		287
291	/*	288	/*
292	* Move-monster returns 1 if the object has been freed, otherwise 0.	289	* monster_can_pick(): If the monster is interested in picking up
		290	* the item, then return 0. Otherwise 0.
		291	* Instead of pick_up, flags for "greed", etc, should be used.
		292	* I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
293	*/	293	*/
		294	static int
		295	monster_can_pick (object *monster, object *item)
		296	{
		297	int flag = 0;
		298	int i;
294		299
295	int move_monster(object *op) {	300	if (!can_pick (monster, item))
296	int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */
297	object *owner, *enemy, *part, *oph=op;
298	rv_vector rv;
299
300	/* Monsters not on maps don't do anything. These monsters are things
301	* Like royal guards in city dwellers inventories.
302	*/
303	if (!op->map) return 0;
304
305	/* for target facing, we copy this value here for fast access */
306	if(oph->head) /* force update the head - one arch one pic */
307	oph = oph->head;
308
309	if (QUERY_FLAG(op, FLAG_NO_ATTACK)) /* we never ever attack */
310	enemy = op->enemy = NULL;
311	else if((enemy= find_enemy(op, &rv)))
312	{
313	/* we have an enemy, just tell him we want him dead */
314	enemy->attacked_by = op; /* our ptr */
315	enemy->attacked_by_count = op->count; /* our tag */
316	}
317
318	/* generate hp, if applicable */
319	if(op->stats.Con > 0 && op->stats.hp < op->stats.maxhp) {
320
321	/* last heal is in funny units. Dividing by speed puts
322	* the regeneration rate on a basis of time instead of
323	* #moves the monster makes. The scaling by 8 is
324	* to capture 8th's of a hp fraction regens
325	*
326	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
327	* overflow might produce monsters with negative hp.
328	*/
329
330	op->last_heal+= (int)((float)(8*op->stats.Con)/FABS(op->speed));
331	op->stats.hp = MIN((sint32)op->stats.hp+op->last_heal/32, op->stats.maxhp); /* causes Con/4 hp/tick */
332	op->last_heal%=32;
333
334	/* So if the monster has gained enough HP that they are no longer afraid */
335	if (QUERY_FLAG(op,FLAG_RUN_AWAY) &&
336	op->stats.hp >= (signed short)(((float)op->run_away/(float)100)*
337	(float)op->stats.maxhp))
338	CLEAR_FLAG(op, FLAG_RUN_AWAY);
339
340	if(op->stats.hp>op->stats.maxhp)
341	op->stats.hp=op->stats.maxhp;
342	}
343
344	/* generate sp, if applicable */
345	if(op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp) {
346
347	/* last_sp is in funny units. Dividing by speed puts
348	* the regeneration rate on a basis of time instead of
349	* #moves the monster makes. The scaling by 8 is
350	* to capture 8th's of a sp fraction regens
351	*
352	* Cast to sint32 before comparing to maxhp since otherwise an (sint16)
353	* overflow might produce monsters with negative sp.
354	*/
355
356	op->last_sp+= (int)((float)(8*op->stats.Pow)/FABS(op->speed));
357	op->stats.sp = MIN(op->stats.sp+op->last_sp/128, op->stats.maxsp); /* causes Pow/16 sp/tick */
358	op->last_sp%=128;
359	}
360
361	/* this should probably get modified by many more values.
362	* (eg, creatures resistance to fear, level, etc. )
363	*/
364	if(QUERY_FLAG(op, FLAG_SCARED) &&!(RANDOM()%20)) {
365	CLEAR_FLAG(op,FLAG_SCARED); /* Time to regain some "guts"... */
366	}
367
368	if (INVOKE_OBJECT (MOVE, op, ARG_OBJECT (op->enemy)))//TODO: should go away
369	return 0;
370
371	if ( QUERY_FLAG(op, FLAG_SLEEP) || QUERY_FLAG(op, FLAG_BLIND) ||
372	((op->map->darkness>0) && !QUERY_FLAG(op,FLAG_SEE_IN_DARK) &&
373	!QUERY_FLAG(op,FLAG_SEE_INVISIBLE))) {
374	if(!check_wakeup(op,enemy,&rv))
375	return 0;
376	}
377
378	/* check if monster pops out of hidden spot */
379	if(op->hide) do_hidden_move(op);
380
381	if(op->pick_up)
382	monster_check_pickup(op);
383
384	if(op->will_apply)
385	monster_apply_below(op); /* Check for items to apply below */
386
387	/* If we don't have an enemy, do special movement or the like */
388	if(!enemy) {
389	if(QUERY_FLAG(op, FLAG_ONLY_ATTACK)) {
390	remove_ob(op);
391	free_object(op);
392	return 1;
393	}
394
395	/* Probably really a bug for a creature to have both
396	* stand still and a movement type set.
397	*/
398	if(!QUERY_FLAG(op, FLAG_STAND_STILL)) {
399	if (op->attack_movement & HI4)
400	{
401	switch (op->attack_movement & HI4) {
402	case (PETMOVE):
403	pet_move (op);
404	break;
405
406	case (CIRCLE1):
407	circ1_move (op);
408	break;
409
410	case (CIRCLE2):
411	circ2_move (op);
412	break;
413
414	case (PACEV):
415	pace_movev(op);
416	break;
417
418	case (PACEH):
419	pace_moveh(op);
420	break;
421
422	case (PACEV2):
423	pace2_movev (op);
424	break;
425
426	case (PACEH2):
427	pace2_moveh (op);
428	break;
429
430	case (RANDO):
431	rand_move (op);
432	break;
433
434	case (RANDO2):
435	move_randomly (op);
436	break;
437	}
438	return 0;
439	}
440	else if (QUERY_FLAG(op,FLAG_RANDOM_MOVE))
441	(void) move_randomly(op);
442
443	} /* stand still */
444	return 0;
445	} /* no enemy */
446
447	/* We have an enemy. Block immediately below is for pets */
448	if((op->attack_movement&HI4) == PETMOVE && (owner = get_owner(op)) != NULL && !on_same_map(op,owner))
449	return follow_owner(op, owner);
450
451	/* doppleganger code to change monster facing to that of the nearest
452	* player. Hmm. The code is here, but no monster in the current
453	* arch set uses it.
454	*/
455	if ( (op->race != NULL)&& strcmp(op->race,"doppleganger") == 0)
456	{
457	op->face = enemy->face;
458	if (op->name)
459	free_string(op->name);
460	add_refcount(op->name = enemy->name);
461	}
462
463	/* Calculate range information for closest body part - this
464	* is used for the 'skill' code, which isn't that smart when
465	* it comes to figuring it out - otherwise, giants throw boulders
466	* into themselves.
467	*/
468	get_rangevector(op, enemy, &rv, 0);
469
470	/* Move the check for scared up here - if the monster was scared,
471	* we were not doing any of the logic below, so might as well save
472	* a few cpu cycles.
473	*/
474	if (!QUERY_FLAG(op, FLAG_SCARED))
475	{
476	rv_vector rv1;
477
478	/* now we test every part of an object .... this is a real ugly piece of code */
479	for (part=op; part!=NULL; part=part->more) {
480	get_rangevector(part, enemy, &rv1, 0x1);
481	dir=rv1.direction;
482
483	/* hm, not sure about this part - in original was a scared flag here too
484	* but that we test above... so can be old code here
485	*/
486	if(QUERY_FLAG(op,FLAG_RUN_AWAY))
487	dir=absdir(dir+4);
488	if(QUERY_FLAG(op,FLAG_CONFUSED))
489	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);
490
491	if(QUERY_FLAG(op,FLAG_CAST_SPELL) && !(RANDOM()%3)) {
492	if(monster_cast_spell(op,part,enemy,dir,&rv1))
493	return 0;
494	}
495
496	if(QUERY_FLAG(op,FLAG_READY_SCROLL) && !(RANDOM()%3)) {
497	if(monster_use_scroll(op,part,enemy,dir,&rv1))
498	return 0;
499	}
500
501	if(QUERY_FLAG(op,FLAG_READY_RANGE)&&!(RANDOM()%3)) {
502	if(monster_use_range(op,part,enemy,dir))
503	return 0;
504	}
505	if(QUERY_FLAG(op,FLAG_READY_SKILL)&&!(RANDOM()%3)) {
506	if(monster_use_skill(op,rv.part,enemy,rv.direction))
507	return 0;
508	}
509	if(QUERY_FLAG(op,FLAG_READY_BOW)&&!(RANDOM()%2)) {
510	if(monster_use_bow(op,part,enemy,dir))
511	return 0;
512	}
513	} /* for processing of all parts */
514	} /* If not scared */
515
516
517	part = rv.part;
518	dir=rv.direction;
519
520	if(QUERY_FLAG(op, FLAG_SCARED) || QUERY_FLAG(op,FLAG_RUN_AWAY))
521	dir=absdir(dir+4);
522
523	if(QUERY_FLAG(op,FLAG_CONFUSED))
524	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);
525
526	pre_att_dir = dir; /* remember the original direction */
527
528	if ((op->attack_movement & LO4) && !QUERY_FLAG(op, FLAG_SCARED))
529	{
530	switch (op->attack_movement & LO4) {
531	case DISTATT:
532	dir = dist_att (dir,op,enemy,part,&rv);
533	break;
534
535	case RUNATT:
536	dir = run_att (dir,op,enemy,part,&rv);
537	break;
538
539	case HITRUN:
540	dir = hitrun_att(dir,op,enemy);
541	break;
542
543	case WAITATT:
544	dir = wait_att (dir,op,enemy,part,&rv);
545	break;
546
547	case RUSH: /* default - monster normally moves towards player */
548	case ALLRUN:
549	break;
550
551	case DISTHIT:
552	dir = disthit_att (dir,op,enemy,part,&rv);
553	break;
554
555	case WAIT2:
556	dir = wait_att2 (dir,op,enemy,part,&rv);
557	break;
558
559	default:
560	LOG(llevDebug,"Illegal low mon-move: %d\n",op->attack_movement & LO4);
561	}
562	}
563
564	if (!dir)
565	return 0;	301	return 0;
566		302
567	if (!QUERY_FLAG(op,FLAG_STAND_STILL)) {	303	if (item->flag [FLAG_UNPAID])
568	if(move_object(op,dir)) /* Can the monster move directly toward player? */	304	return 0;
		305
		306	if (monster->pick_up & 64) /* All */
		307	flag = 1;
		308
		309	else
		310	switch (item->type)
		311	{
		312	case MONEY:
		313	case GEM:
		314	flag = monster->pick_up & 2;
		315	break;
		316
		317	case FOOD:
		318	flag = monster->pick_up & 4;
		319	break;
		320
		321	case WEAPON:
		322	flag = (monster->pick_up & 8) || monster->flag [FLAG_USE_WEAPON];
		323	break;
		324
		325	case ARMOUR:
		326	case SHIELD:
		327	case HELMET:
		328	case BOOTS:
		329	case GLOVES:
		330	case GIRDLE:
		331	flag = (monster->pick_up & 16) || monster->flag [FLAG_USE_ARMOUR];
		332	break;
		333
		334	case SKILL:
		335	flag = monster->flag [FLAG_CAN_USE_SKILL];
		336	break;
		337
		338	case RING:
		339	flag = monster->flag [FLAG_USE_RING];
		340	break;
		341
		342	case RANGED:
		343	case WAND:
		344	case HORN:
		345	case ROD:
		346	flag = monster->flag [FLAG_USE_RANGE];
		347	break;
		348
		349	case SPELLBOOK:
		350	flag = monster->arch && monster->arch->flag [FLAG_CAST_SPELL];
		351	break;
		352
		353	case SCROLL:
		354	flag = monster->flag [FLAG_USE_SCROLL];
		355	break;
		356
		357	case BOW:
		358	case ARROW:
		359	flag = monster->flag [FLAG_USE_BOW];
		360	break;
		361	}
		362
		363	/* Simplistic check - if the monster has a location to equip it, he will
		364	* pick it up. Note that this doesn't handle cases where an item may
		365	* use several locations.
		366	*/
		367	for (i = 0; i < NUM_BODY_LOCATIONS; i++)
		368	{
		369	if (monster->slot[i].info && item->slot[i].info)
569	{	370	{
570	/* elmex: Turn our monster after it moved if it has DISTATT attack */	371	flag = 1;
571	if ((op->attack_movement & LO4) == DISTATT)	372	break;
572	op->direction = pre_att_dir;
573
574	return 0;
575	}	373	}
576
577	if(QUERY_FLAG(op, FLAG_SCARED) || !can_hit(part,enemy,&rv)
578	|| QUERY_FLAG(op,FLAG_RUN_AWAY)) {
579
580	/* Try move around corners if !close */
581	int maxdiff = (QUERY_FLAG(op, FLAG_ONLY_ATTACK) || RANDOM()&1) ? 1 : 2;
582	for(diff = 1; diff <= maxdiff; diff++) {
583	/* try different detours */
584	int m = 1-(RANDOM()&2); /* Try left or right first? */
585	if(move_object(op,absdir(dir + diff*m)) ||
586	move_object(op,absdir(dir - diff*m)))
587	return 0;
588	}
589	}
590	} /* if monster is not standing still */
591
592	/* elmex: Turn our monster after it moved if it has DISTATT attack */
593	if ((op->attack_movement & LO4) == DISTATT)
594	op->direction = pre_att_dir;
595
596	/*
597	* Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
598	* direction if they can't move away.
599	*/
600	if (!QUERY_FLAG(op, FLAG_ONLY_ATTACK)&&(QUERY_FLAG(op,FLAG_RUN_AWAY)||QUERY_FLAG(op, FLAG_SCARED)))
601	if(move_randomly(op))
602	return 0;
603
604	/*
605	* Try giving the monster a new enemy - the player that is closest
606	* to it. In this way, it won't just keep trying to get to a target
607	* that is inaccessible.
608	* This could be more clever - it should go through a list of several
609	* enemies, as it is now, you could perhaps get situations where there
610	* are two players flanking the monster at close distance, but which
611	* the monster can't get to, and a third one at a far distance that
612	* the monster could get to - as it is, the monster won't look at that
613	* third one.
614	*/
615	if (!QUERY_FLAG(op, FLAG_FRIENDLY) && enemy == op->enemy)
616	{	374	}
617	object *nearest_player = get_nearest_player(op);
618	if (nearest_player && nearest_player != enemy && !can_hit(part,enemy,&rv)) {
619	op->enemy = NULL;
620	enemy = nearest_player;
621	}
622	}
623		375
624	if(!QUERY_FLAG(op, FLAG_SCARED)&&can_hit(part,enemy,&rv))	376	if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
625	{
626	/* The adjustement to wc that was here before looked totally bogus -
627	* since wc can in fact get negative, that would mean by adding
628	* the current wc, the creature gets better? Instead, just
629	* add a fixed amount - nasty creatures that are runny away should
630	* still be pretty nasty.
631	*/
632	if(QUERY_FLAG(op,FLAG_RUN_AWAY))
633	{
634	part->stats.wc+=10;
635	(void)skill_attack(enemy,part,0,NULL, NULL);
636	part->stats.wc-=10;
637	}
638	else
639	(void)skill_attack(enemy,part,0,NULL, NULL);
640	} /* if monster is in attack range */
641
642	if(QUERY_FLAG(part,FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
643	return 1;	377	return 1;
644		378
645	if(QUERY_FLAG(op, FLAG_ONLY_ATTACK))	379	return 0;
		380	}
		381
		382	/*
		383	* monster_check_pickup(): checks for items that monster can pick up.
		384	*
		385	* Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
		386	* Each time the blob passes over some treasure, it will
		387	* grab it a.s.a.p.
		388	*
		389	* Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
		390	* to handle this.
		391	*
		392	* This function was seen be continueing looping at one point (tmp->below
		393	* became a recursive loop. It may be better to call monster_check_apply
		394	* after we pick everything up, since that function may call others which
		395	* affect stacking on this space.
		396	*/
		397	static void
		398	monster_check_pickup (object *monster)
		399	{
		400	object *tmp, *next;
		401
		402	for (tmp = monster->below; tmp != NULL; tmp = next)
646	{	403	{
647	remove_ob(op);	404	next = tmp->below;
648	free_object(op);	405	if (monster_can_pick (monster, tmp))
		406	{
		407	tmp->remove ();
		408	tmp = insert_ob_in_ob (tmp, monster);
		409	monster_check_apply (monster, tmp);
		410	}
		411
		412	/* We could try to re-establish the cycling, of the space, but probably
		413	* not a big deal to just bail out.
		414	*/
		415	if (next && next->destroyed ())
649	return 1;	416	return;
		417	}
		418	}
		419
		420	/*
		421	* monster_apply_below():
		422	* Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
		423	* eager to apply things, encounters something apply-able,
		424	* then make him apply it
		425	*/
		426	static void
		427	monster_apply_below (object *monster)
		428	{
		429	object *tmp, *next;
		430
		431	for (tmp = monster->below; tmp != NULL; tmp = next)
650	}	432	{
651	return 0;	433	next = tmp->below;
652	}	434	switch (tmp->type)
653	int can_hit(object *ob1,object *ob2, rv_vector *rv) {	435	{
654	object *more;	436	case T_HANDLE:
655	rv_vector rv1;	437	case TRIGGER:
		438	if (monster->will_apply & 1)
		439	monster->apply (tmp);
		440	break;
656		441
657	if(QUERY_FLAG(ob1,FLAG_CONFUSED)&&!(RANDOM()%3))	442	case TREASURE:
658	return 0;	443	if (monster->will_apply & 2)
		444	monster->apply (tmp);
		445	break;
659		446
660	if (abs(rv->distance_x)<2&&abs(rv->distance_y)<2) return 1;	447	}
661		448	if (tmp->flag [FLAG_IS_FLOOR])
662	/* check all the parts of ob2 - just because we can't get to	449	break;
663	* its head doesn't mean we don't want to pound its feet
664	*/
665	for (more = ob2->more; more!=NULL; more = more->more) {
666	get_rangevector(ob1, more, &rv1, 0);
667	if (abs(rv1.distance_x)<2&&abs(rv1.distance_y)<2) return 1;
668	}	450	}
669	return 0;
670
671	}	451	}
672		452
673	/* Returns 1 is monster should cast spell sp at an enemy	453	/* Returns 1 is monster should cast spell sp at an enemy
674	* Returns 0 if the monster should not cast this spell.	454	* Returns 0 if the monster should not cast this spell.
675	*	455	*
…		…
683	*	463	*
684	* This could be a lot smarter - if there are few monsters around,	464	* This could be a lot smarter - if there are few monsters around,
685	* then disease might not be as bad. Likewise, if the monster is damaged,	465	* then disease might not be as bad. Likewise, if the monster is damaged,
686	* the right type of healing spell could be useful.	466	* the right type of healing spell could be useful.
687	*/	467	*/
688		468	static int
689	static int monster_should_cast_spell(object *monster, object *spell_ob)	469	monster_should_cast_spell (object *monster, object *spell_ob)
690	{	470	{
691	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||	471	if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||
692	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||	472	spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||
693	spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||	473	spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||
694	spell_ob->subtype == SP_MAGIC_MISSILE || spell_ob->subtype == SP_SUMMON_GOLEM ||	474	spell_ob->subtype == SP_MAGIC_MISSILE || spell_ob->subtype == SP_SUMMON_GOLEM ||
695	spell_ob->subtype == SP_MAGIC_WALL || spell_ob->subtype == SP_SUMMON_MONSTER ||	475	spell_ob->subtype == SP_MAGIC_WALL || spell_ob->subtype == SP_SUMMON_MONSTER ||
696	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM ||	476	spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE)
697	spell_ob->subtype == SP_INVISIBLE)	477	return 1;
698		478
		479	return 0;
		480	}
		481
		482	/* Checks if putting on 'item' will make 'who' do more
		483	* damage. This is a very simplistic check - also checking things
		484	* like speed and ac are also relevant.
		485	*
		486	* return true if item is a better object.
		487	*/
		488	static int
		489	check_good_weapon (object *who, object *item)
		490	{
		491	object *other_weap;
		492	int val = 0, i;
		493
		494	for (other_weap = who->inv; other_weap; other_weap = other_weap->below)
		495	if (other_weap->type == item->type && other_weap->flag [FLAG_APPLIED])
		496	break;
		497
		498	if (!other_weap) /* No other weapons */
		499	return 1;
		500
		501	/* Rather than go through and apply the new one, and see if it is
		502	* better, just do some simple checks
		503	* Put some multipliers for things that hvae several effects,
		504	* eg, magic affects both damage and wc, so it has more weight
		505	*/
		506
		507	val = item->stats.dam - other_weap->stats.dam;
		508	val += (item->magic - other_weap->magic) * 3;
		509	/* Monsters don't really get benefits from things like regen rates
		510	* from items. But the bonus for their stats are very important.
		511	*/
		512	for (i = 0; i < NUM_STATS; i++)
		513	val += item->stats.stat (i) - other_weap->stats.stat (i) * 2;
		514
		515	if (val > 0)
		516	return 1;
		517	else
		518	return 0;
		519	}
		520
		521	static int
		522	check_good_armour (object *who, object *item)
		523	{
		524	object *other_armour;
		525	int val = 0, i;
		526
		527	for (other_armour = who->inv; other_armour; other_armour = other_armour->below)
		528	if (other_armour->type == item->type && other_armour->flag [FLAG_APPLIED])
		529	break;
		530
		531	if (other_armour == NULL) /* No other armour, use the new */
		532	return 1;
		533
		534	/* Like above function , see which is better */
		535	val = item->stats.ac - other_armour->stats.ac;
		536	val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL]) / 5;
		537	val += (item->magic - other_armour->magic) * 3;
		538
		539	/* for the other protections, do weigh them very much in the equation -
		540	* it is the armor protection which is most important, because there is
		541	* no good way to know what the player may attack the monster with.
		542	* So if the new item has better protection than the old, give that higher
		543	* value. If the reverse, then decrease the value of this item some.
		544	*/
		545	for (i = 1; i < NROFATTACKS; i++)
		546	{
		547	if (item->resist[i] > other_armour->resist[i])
		548	val++;
		549	else if (item->resist[i] < other_armour->resist[i])
		550	val--;
		551	}
		552
		553	/* Very few armours have stats, so not much need to worry about those. */
		554
		555	if (val > 0)
		556	return 1;
		557	else
		558	return 0;
		559	}
		560
		561	/*
		562	* monster_check_apply() is meant to be called after an item is
		563	* inserted in a monster.
		564	* If an item becomes outdated (monster found a better item),
		565	* a pointer to that object is returned, so it can be dropped.
		566	* (so that other monsters can pick it up and use it)
		567	* Note that as things are now, monsters never drop something -
		568	* they can pick up all that they can use.
		569	*/
		570	/* Sept 96, fixed this so skills will be readied -b.t.*/
		571	void
		572	monster_check_apply (object *mon, object *item)
		573	{
		574	int flag = 0;
		575
		576	if (item->type == SPELLBOOK && mon->arch && (mon->arch->flag [FLAG_CAST_SPELL]))
		577	{
		578	mon->set_flag (FLAG_CAST_SPELL);
		579	return;
		580	}
		581
		582	/* If for some reason, this item is already applied, no more work to do */
		583	if (item->flag [FLAG_APPLIED])
		584	return;
		585
		586	/* Might be better not to do this - if the monster can fire a bow,
		587	* it is possible in his wanderings, he will find one to use. In
		588	* which case, it would be nice to have ammo for it.
		589	*/
		590	if (mon->flag [FLAG_USE_BOW] && item->type == ARROW)
		591	{
		592	/* Check for the right kind of bow */
		593	object *bow;
		594
		595	for (bow = mon->inv; bow; bow = bow->below)
		596	if (bow->type == BOW && bow->race == item->race)
		597	{
		598	mon->set_flag (FLAG_READY_BOW);
		599	return; /* nothing more to do for arrows */
		600	}
		601	}
		602
		603	if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE)
		604	flag = 1;
		605	/* Eating food gets hp back */
		606	else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD)
		607	flag = 1;
		608	else if (item->type == SCROLL && mon->flag [FLAG_USE_SCROLL])
		609	{
		610	if (!item->inv)
		611	LOG (llevDebug, "Monster %d having scroll %d with empty inventory!", mon->count, item->count);
		612	else if (monster_should_cast_spell (mon, item->inv))
		613	mon->set_flag (FLAG_READY_SCROLL);
		614	/* Don't use it right now */
		615	return;
		616	}
		617	else if (item->type == WEAPON)
		618	flag = check_good_weapon (mon, item);
		619	else if (item->is_armor ())
		620	flag = check_good_armour (mon, item);
		621	/* Should do something more, like make sure this is a better item */
		622	else if (item->type == RING)
		623	flag = 1;
		624	else if (item->type == WAND || item->type == ROD || item->type == HORN)
		625	{
		626	/* We never really 'ready' the wand/rod/horn, because that would mean the
		627	* weapon would get undone.
		628	*/
		629	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
		630	{
		631	mon->set_flag (FLAG_READY_RANGE);
		632	item->set_flag (FLAG_APPLIED);
		633	}
		634	return;
		635	}
		636	else if (item->type == BOW)
		637	{
		638	/* We never really 'ready' the bow, because that would mean the
		639	* weapon would get undone.
		640	*/
		641	if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
		642	mon->set_flag (FLAG_READY_BOW);
		643	return;
		644	}
		645	else if (item->type == SKILL)
		646	{
		647	/*
		648	* skills are specials: monsters must have the 'FLAG_READY_SKILL' flag set,
		649	* else they can't use the skill...
		650	* Skills also don't need to get applied, so return now.
		651	*/
		652	mon->set_flag (FLAG_READY_SKILL);
		653	return;
		654	}
		655
		656	/* if we don't match one of the above types, return now.
		657	* can_apply_object will say that we can apply things like flesh,
		658	* bolts, and whatever else, because it only checks against the
		659	* body_info locations.
		660	*/
		661	if (!flag)
		662	return;
		663
		664	/* Check to see if the monster can use this item. If not, no need
		665	* to do further processing. Note that can_apply_object already checks
		666	* for the CAN_USE flags.
		667	*/
		668	if (can_apply_object (mon, item) & CAN_APPLY_NOT_MASK)
		669	return;
		670
		671	/* should only be applying this item, not unapplying it.
		672	* also, ignore status of curse so they can take off old armour.
		673	* monsters have some advantages after all.
		674	*/
		675	mon->apply (item, AP_APPLY | AP_IGNORE_CURSE);
		676	}
		677
		678	static int
		679	can_hit (object *ob1, object *ob2, rv_vector * rv)
		680	{
		681	object *more;
		682	rv_vector rv1;
		683
		684	if (ob1->flag [FLAG_CONFUSED] && !(rndm (3)))
		685	return 0;
		686
		687	if (abs (rv->distance_x) < 2 && abs (rv->distance_y) < 2)
		688	return 1;
		689
		690	/* check all the parts of ob2 - just because we can't get to
		691	* its head doesn't mean we don't want to pound its feet
		692	*/
		693	for (more = ob2->more; more; more = more->more)
		694	{
		695	get_rangevector (ob1, more, &rv1, 0);
		696	if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
699	return 1;	697	return 1;
		698	}
700		699
701	return 0;	700	return 0;
702	}	701	}
703		702
		703	static int
		704	dist_att (int dir, object *ob, object *enemy, object *part, rv_vector *rv)
		705	{
		706	if (can_hit (part, enemy, rv))
		707	return dir;
		708
		709	if (rv->distance < 10)
		710	return absdir (dir + 4);
		711	else if (rv->distance > 18)
		712	return dir;
		713
		714	return 0;
		715	}
		716
		717	static int
		718	run_att (int dir, object *ob, object *enemy, object *part, rv_vector *rv)
		719	{
		720	if (can_hit (part, enemy, rv))
		721	return dir;
		722	else
		723	return absdir (dir + 4);
		724	}
		725
		726	static int
		727	hitrun_att (int dir, object *ob, object *enemy)
		728	{
		729	if (ob->move_status++ < 25)
		730	return dir;
		731	else if (ob->move_status < 50)
		732	return absdir (dir + 4);
		733	else
		734	ob->move_status = 0;
		735
		736	return absdir (dir + 4);
		737	}
		738
		739	static int
		740	wait_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		741	{
		742	int inrange = can_hit (part, enemy, rv);
		743
		744	if (ob->move_status || inrange)
		745	ob->move_status++;
		746
		747	if (ob->move_status == 0)
		748	return 0;
		749	else if (ob->move_status < 10)
		750	return dir;
		751	else if (ob->move_status < 15)
		752	return absdir (dir + 4);
		753
		754	ob->move_status = 0;
		755	return 0;
		756	}
		757
		758	static int
		759	disthit_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		760	{
		761	/* The logic below here looked plain wrong before. Basically, what should
		762	* happen is that if the creatures hp percentage falls below run_away,
		763	* the creature should run away (dir+4)
		764	* I think its wrong for a creature to have a zero maxhp value, but
		765	* at least one map has this set, and whatever the map contains, the
		766	* server should try to be resilant enough to avoid the problem
		767	*/
		768	if (ob->stats.hp * 100 < ob->stats.maxhp * ob->run_away)
		769	return absdir (dir + 4);
		770
		771	return dist_att (dir, ob, enemy, part, rv);
		772	}
		773
		774	static int
		775	wait_att2 (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
		776	{
		777	if (rv->distance < 9)
		778	return absdir (dir + 4);
		779
		780	return 0;
		781	}
		782
		783	static void
		784	circ1_move (object *ob)
		785	{
		786	static int circle[12] = { 3, 3, 4, 5, 5, 6, 7, 7, 8, 1, 1, 2 };
		787
		788	if (++ob->move_status > 11)
		789	ob->move_status = 0;
		790
		791	if (!(ob->move (circle[ob->move_status])))
		792	ob->move (rndm (8) + 1);
		793	}
		794
		795	static void
		796	circ2_move (object *ob)
		797	{
		798	static int circle[20] = { 3, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 1, 1, 1, 2, 2 };
		799
		800	if (++ob->move_status > 19)
		801	ob->move_status = 0;
		802
		803	if (!(ob->move (circle[ob->move_status])))
		804	ob->move (rndm (8) + 1);
		805	}
		806
		807	static void
		808	pace_movev (object *ob)
		809	{
		810	if (ob->move_status++ > 6)
		811	ob->move_status = 0;
		812
		813	if (ob->move_status < 4)
		814	ob->move (5);
		815	else
		816	ob->move (1);
		817	}
		818
		819	static void
		820	pace_moveh (object *ob)
		821	{
		822	if (ob->move_status++ > 6)
		823	ob->move_status = 0;
		824
		825	if (ob->move_status < 4)
		826	ob->move (3);
		827	else
		828	ob->move (7);
		829	}
		830
		831	static void
		832	pace2_movev (object *ob)
		833	{
		834	if (ob->move_status++ > 16)
		835	ob->move_status = 0;
		836
		837	if (ob->move_status < 6)
		838	ob->move (5);
		839	else if (ob->move_status < 8)
		840	return;
		841	else if (ob->move_status < 13)
		842	ob->move (1);
		843	else
		844	return;
		845	}
		846
		847	static void
		848	pace2_moveh (object *ob)
		849	{
		850	if (ob->move_status++ > 16)
		851	ob->move_status = 0;
		852
		853	if (ob->move_status < 6)
		854	ob->move (3);
		855	else if (ob->move_status < 8)
		856	return;
		857	else if (ob->move_status < 13)
		858	ob->move (7);
		859	else
		860	return;
		861	}
		862
		863	static void
		864	rand_move (object *ob)
		865	{
		866	if (ob->move_status < 1 || ob->move_status > 8 || !(ob->move (ob->move_status || !(rndm (9)))))
		867	for (int i = 0; i < 5; i++)
		868	if (ob->move (ob->move_status = rndm (8) + 1))
		869	return;
		870	}
704		871
705	#define MAX_KNOWN_SPELLS 20	872	#define MAX_KNOWN_SPELLS 20
706		873
707	/* Returns a randomly selected spell. This logic is still	874	/* Returns a randomly selected spell. This logic is still
708	* less than ideal. This code also only seems to deal with	875	* less than ideal. This code also only seems to deal with
709	* wizard spells, as the check is against sp, and not grace.	876	* wizard spells, as the check is against sp, and not grace.
710	* can mosnters know cleric spells?	877	* can mosnters know cleric spells?
711	*/	878	*/
		879	static object *
712	object *monster_choose_random_spell(object *monster) {	880	monster_choose_random_spell (object *monster)
		881	{
713	object *altern[MAX_KNOWN_SPELLS];	882	object *altern[MAX_KNOWN_SPELLS];
714	object *tmp;
715	int i=0;	883	int i = 0;
716		884
717	for(tmp=monster->inv;tmp!=NULL;tmp=tmp->below)	885	for (object *tmp = monster->inv; tmp; tmp = tmp->below)
718	if (tmp->type==SPELLBOOK || tmp->type==SPELL) {	886	if (tmp->type == SPELLBOOK || tmp->type == SPELL)
		887	{
719	/* Check and see if it's actually a useful spell.	888	/* Check and see if it's actually a useful spell.
720	* If its a spellbook, the spell is actually the inventory item.	889	* If its a spellbook, the spell is actually the inventory item.
721	* if it is a spell, then it is just the object itself.	890	* if it is a spell, then it is just the object itself.
722	*/	891	*/
723	if (monster_should_cast_spell(monster, (tmp->type==SPELLBOOK)?tmp->inv:tmp)) {	892	if (monster_should_cast_spell (monster, (tmp->type == SPELLBOOK) ? tmp->inv : tmp))
		893	{
724	altern[i++]=tmp;	894	altern [i++] = tmp;
		895
725	if(i==MAX_KNOWN_SPELLS)	896	if (i == MAX_KNOWN_SPELLS)
726	break;	897	break;
727	}	898	}
728	}	899	}
729	if(!i)	900
730	return NULL;	901	return i ? altern [rndm (i)] : 0;
731	return altern[RANDOM()%i];
732	}	902	}
733		903
734	/* This checks to see if the monster should cast a spell/ability.	904	/* This checks to see if the monster should cast a spell/ability.
735	* it returns true if the monster casts a spell, 0 if he doesn't.	905	* it returns true if the monster casts a spell, 0 if he doesn't.
736	* head is the head of the monster.	906	* head is the head of the monster.
737	* part is the part of the monster we are checking against.	907	* part is the part of the monster we are checking against.
738	* pl is the target.	908	* pl is the target.
739	* dir is the direction to case.	909	* dir is the direction to case.
740	* rv is the vector which describes where the enemy is.	910	* rv is the vector which describes where the enemy is.
741	*/	911	*/
742		912	static int
743	int monster_cast_spell(object *head, object *part,object *pl,int dir, rv_vector *rv) {	913	monster_cast_spell (object *head, object *part, object *pl, int dir, rv_vector * rv)
		914	{
744	object *spell_item;	915	object *spell_item;
745	object *owner;	916	object *owner;
746	rv_vector rv1;	917	rv_vector rv1;
747		918
748	/* If you want monsters to cast spells over friends, this spell should	919	/* If you want monsters to cast spells over friends, this spell should
749	* be removed. It probably should be in most cases, since monsters still	920	* be removed. It probably should be in most cases, since monsters still
750	* don't care about residual effects (ie, casting a cone which may have a	921	* don't care about residual effects (ie, casting a cone which may have a
751	* clear path to the player, the side aspects of the code will still hit	922	* clear path to the player, the side aspects of the code will still hit
752	* other monsters)	923	* other monsters)
753	*/	924	*/
754	if(!(dir=path_to_player(part,pl,0)))	925	if (!(dir = path_to_player (part, pl, 0)))
755	return 0;	926	return 0;
		927
		928	if (head->flag [FLAG_FRIENDLY] && (owner = head->owner) != NULL)
756		929	{
757	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {
758	get_rangevector(head, owner, &rv1, 0x1);	930	get_rangevector (head, owner, &rv1, 0x1);
759	if(dirdiff(dir,rv1.direction) < 2) {	931	if (dirdiff (dir, rv1.direction) < 2)
760	return 0; /* Might hit owner with spell */	932	return 0; /* Might hit owner with spell */
761	}
762	}	933	}
763		934
764	if(QUERY_FLAG(head,FLAG_CONFUSED))	935	if (head->flag [FLAG_CONFUSED])
765	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	936	dir = absdir (dir + rndm (3) + rndm (3) - 2);
766		937
767	/* If the monster hasn't already chosen a spell, choose one	938	/* If the monster hasn't already chosen a spell, choose one
768	* I'm not sure if it really make sense to pre-select spells (events	939	* I'm not sure if it really make sense to pre-select spells (events
769	* could be different by the time the monster goes again).	940	* could be different by the time the monster goes again).
770	*/	941	*/
771	if(head->spellitem==NULL) {	942	if (head->spellitem == NULL)
		943	{
772	if((spell_item=monster_choose_random_spell(head))==NULL) {	944	if ((spell_item = monster_choose_random_spell (head)) == NULL)
773	LOG(llevMonster,"Turned off spells in %s\n",head->name);	945	{
774	CLEAR_FLAG(head, FLAG_CAST_SPELL); /* Will be turned on when picking up book */	946	head->clr_flag (FLAG_CAST_SPELL); /* Will be turned on when picking up book */
775	return 0;	947	return 0;
776	}	948	}
		949
777	if (spell_item->type == SPELLBOOK) {	950	if (spell_item->type == SPELLBOOK)
		951	{
778	if (!spell_item->inv) {	952	if (!spell_item->inv)
		953	{
779	LOG(llevError,"spellbook %s does not contain a spell?\n", spell_item->name);	954	LOG (llevError, "spellbook %s does not contain a spell?\n", &spell_item->name);
780	return 0;	955	return 0;
781	}	956	}
		957
782	spell_item=spell_item->inv;	958	spell_item = spell_item->inv;
783	}	959	}
784	}	960	}
785	else	961	else
786	spell_item=head->spellitem;	962	spell_item = head->spellitem;
787		963
788	if (!spell_item) return 0;	964	if (!spell_item)
		965	return 0;
789		966
790	/* Best guess this is a defensive/healing spell */	967	/* Best guess this is a defensive/healing spell */
791	if (spell_item->range<=1 || spell_item->stats.dam < 0)	968	if (spell_item->range <= 1 || spell_item->stats.dam < 0)
792	dir = 0;	969	dir = 0;
793		970
794	/* Monster doesn't have enough spell-points */	971	/* Monster doesn't have enough spell-points */
795	if(head->stats.sp<SP_level_spellpoint_cost(head,spell_item, SPELL_MANA))	972	if (head->stats.sp < SP_level_spellpoint_cost (head, spell_item, SPELL_MANA))
796	return 0;	973	return 0;
797		974
798	if(head->stats.grace<SP_level_spellpoint_cost(head,spell_item, SPELL_GRACE))	975	if (head->stats.grace < SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE))
799	return 0;	976	return 0;
800		977
801	head->stats.sp-=SP_level_spellpoint_cost(head,spell_item, SPELL_MANA);	978	head->stats.sp -= SP_level_spellpoint_cost (head, spell_item, SPELL_MANA);
802	head->stats.grace-=SP_level_spellpoint_cost(head,spell_item, SPELL_GRACE);	979	head->stats.grace -= SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE);
803		980
804	/* set this to null, so next time monster will choose something different */	981	/* set this to null, so next time monster will choose something different */
805	head->spellitem = NULL;	982	head->spellitem = NULL;
806		983
807	return cast_spell(part,part,dir, spell_item, NULL);	984	return cast_spell (part, part, dir, spell_item, NULL);
808	}	985	}
809		986
810		987	static int
811	int monster_use_scroll(object *head, object *part,object *pl,int dir, rv_vector *rv) {	988	monster_use_scroll (object *head, object *part, object *pl, int dir, rv_vector * rv)
		989	{
812	object *scroll;	990	object *scroll;
813	object *owner;	991	object *owner;
814	rv_vector rv1;	992	rv_vector rv1;
815		993
816	/* If you want monsters to cast spells over friends, this spell should	994	/* If you want monsters to cast spells over friends, this spell should
817	* be removed. It probably should be in most cases, since monsters still	995	* be removed. It probably should be in most cases, since monsters still
818	* don't care about residual effects (ie, casting a cone which may have a	996	* don't care about residual effects (ie, casting a cone which may have a
819	* clear path to the player, the side aspects of the code will still hit	997	* clear path to the player, the side aspects of the code will still hit
820	* other monsters)	998	* other monsters)
821	*/	999	*/
822	if(!(dir=path_to_player(part,pl,0)))	1000	if (!(dir = path_to_player (part, pl, 0)))
823	return 0;	1001	return 0;
		1002
		1003	if (head->flag [FLAG_FRIENDLY] && (owner = head->owner) != NULL)
824		1004	{
825	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {
826	get_rangevector(head, owner, &rv1, 0x1);	1005	get_rangevector (head, owner, &rv1, 0x1);
827	if(dirdiff(dir,rv1.direction) < 2) {	1006	if (dirdiff (dir, rv1.direction) < 2)
828	return 0; /* Might hit owner with spell */
829	}	1007	{
		1008	return 0; /* Might hit owner with spell */
		1009	}
830	}	1010	}
831		1011
832	if(QUERY_FLAG(head,FLAG_CONFUSED))	1012	if (head->flag [FLAG_CONFUSED])
833	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);	1013	dir = absdir (dir + rndm (3) + rndm (3) - 2);
834		1014
835	for (scroll=head->inv; scroll; scroll=scroll->below)	1015	for (scroll = head->inv; scroll; scroll = scroll->below)
836	if (scroll->type == SCROLL && monster_should_cast_spell(head, scroll->inv)) break;	1016	if (scroll->type == SCROLL && monster_should_cast_spell (head, scroll->inv))
		1017	break;
837		1018
838	/* Used up all his scrolls, so nothing do to */	1019	/* Used up all his scrolls, so nothing do to */
839	if (!scroll) {	1020	if (!scroll)
840	CLEAR_FLAG(head, FLAG_READY_SCROLL);	1021	{
		1022	head->clr_flag (FLAG_READY_SCROLL);
841	return 0;	1023	return 0;
842	}	1024	}
843		1025
844	/* Spell should be cast on caster (ie, heal, strength) */	1026	/* Spell should be cast on caster (ie, heal, strength) */
845	if (scroll->inv->range==0)	1027	if (scroll->inv->range == 0)
846	dir = 0;	1028	dir = 0;
847		1029
848	apply_scroll(part, scroll, dir);	1030	apply_scroll (part, scroll, dir);
849	return 1;	1031	return 1;
850	}	1032	}
851		1033
852	/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.	1034	/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.
853	* Note that monsters do not need the skills SK_MELEE_WEAPON and	1035	* Note that monsters do not need the skills SK_MELEE_WEAPON and
854	* SK_MISSILE_WEAPON to make those respective attacks, if we	1036	* SK_MISSILE_WEAPON to make those respective attacks, if we
…		…
857	*	1039	*
858	* The skills we are treating here are all but those. -b.t.	1040	* The skills we are treating here are all but those. -b.t.
859	*	1041	*
860	* At the moment this is only useful for throwing, perhaps for	1042	* At the moment this is only useful for throwing, perhaps for
861	* stealing. TODO: This should be more integrated in the game. -MT, 25.11.01	1043	* stealing. TODO: This should be more integrated in the game. -MT, 25.11.01
862	*/	1044	*/
863		1045	static int
864	int monster_use_skill(object *head, object *part, object *pl,int dir) {	1046	monster_use_skill (object *head, object *part, object *pl, int dir)
		1047	{
865	object *skill, *owner;	1048	object *skill, *owner;
866		1049
867	if(!(dir=path_to_player(part,pl,0)))	1050	if (!(dir = path_to_player (part, pl, 0)))
		1051	return 0;
		1052
		1053	if (head->flag [FLAG_FRIENDLY] && (owner = head->owner) != NULL)
		1054	{
		1055	int dir2 = find_dir_2 (owner->x - head->x, owner->y - head->y);
		1056
		1057	if (dirdiff (dir, dir2) < 1)
		1058	return 0; /* Might hit owner with skill -thrown rocks for example ? */
		1059	}
		1060
		1061	if (head->flag [FLAG_CONFUSED])
		1062	dir = absdir (dir + rndm (3) + rndm (3) - 2);
		1063
		1064	object *new_skill = 0;
		1065
		1066	// skill selection - monster will use the last unused skill
		1067	// and rotate, eventually cycling through all skills.
		1068	for (skill = head->inv; skill; skill = skill->below)
		1069	if (skill->type == SKILL && skill != head->chosen_skill)
		1070	new_skill = skill;
		1071
		1072	if (new_skill)
		1073	splay (head->chosen_skill = new_skill);
		1074	else if (!head->chosen_skill)
		1075	{
		1076	LOG (llevDebug, "Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n", &head->name, head->count);
		1077	head->clr_flag (FLAG_READY_SKILL);
868	return 0;	1078	return 0;
869
870	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {
871	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);
872	if(dirdiff(dir,dir2) < 1)
873	return 0; /* Might hit owner with skill -thrown rocks for example ?*/
874	}	1079	}
875	if(QUERY_FLAG(head,FLAG_CONFUSED))
876	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);
877		1080
878	/* skill selection - monster will use the next unused skill.
879	* well...the following scenario will allow the monster to
880	* toggle between 2 skills. One day it would be nice to make
881	* more skills available to monsters.
882	*/
883
884	for(skill=head->inv;skill!=NULL;skill=skill->below)
885	if(skill->type==SKILL && skill!=head->chosen_skill) {
886	head->chosen_skill=skill;
887	break;
888	}
889
890	if(!skill && !head->chosen_skill) {
891	LOG(llevDebug,"Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n",
892	head->name,head->count);
893	CLEAR_FLAG(head, FLAG_READY_SKILL);
894	return 0;
895	}
896	/* use skill */	1081	/* use skill */
897	return do_skill(head, part, head->chosen_skill,dir,NULL);	1082	return do_skill (head, part, head->chosen_skill, dir, NULL);
898	}	1083	}
899		1084
900	/* Monster will use a ranged spell attack. */	1085	/* Monster will use a ranged spell attack. */
901		1086	static int
902	int monster_use_range(object *head,object *part,object *pl,int dir)	1087	monster_use_range (object *head, object *part, object *pl, int dir)
903	{	1088	{
904	object *wand, *owner;	1089	object *wand, *owner;
905	int at_least_one = 0;	1090	int at_least_one = 0;
906		1091
907	if(!(dir=path_to_player(part,pl,0)))	1092	if (!(dir = path_to_player (part, pl, 0)))
908	return 0;	1093	return 0;
909		1094
910	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	1095	if (head->flag [FLAG_FRIENDLY] && (owner = head->owner) != NULL)
		1096	{
911	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	1097	int dir2 = find_dir_2 (owner->x - head->x, owner->y - head->y);
		1098
912	if(dirdiff(dir,dir2) < 2)	1099	if (dirdiff (dir, dir2) < 2)
913	return 0; /* Might hit owner with spell */	1100	return 0; /* Might hit owner with spell */
914	}	1101	}
915	if(QUERY_FLAG(head,FLAG_CONFUSED))
916	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);
917		1102
		1103	if (head->flag [FLAG_CONFUSED])
		1104	dir = absdir (dir + rndm (3) + rndm (3) - 2);
		1105
918	for(wand=head->inv;wand!=NULL;wand=wand->below)	1106	for (wand = head->inv; wand; wand = wand->below)
919	{	1107	{
920	if (wand->type == WAND)	1108	if (wand->type == WAND)
		1109	{
		1110	/* Found a wand, let's see if it has charges left */
		1111	at_least_one = 1;
		1112	if (wand->stats.food <= 0)
		1113	continue;
		1114
		1115	cast_spell (head, wand, dir, wand->inv, NULL);
		1116
		1117	if (!(--wand->stats.food))
921	{	1118	{
922	/* Found a wand, let's see if it has charges left */	1119	if (wand->arch)
923	at_least_one = 1;
924	if( wand->stats.food<=0 )
925	continue;
926
927	cast_spell( head, wand, dir, wand->inv, NULL );
928
929	if ( !( --wand->stats.food ) )
930	{	1120	{
931	if ( wand->arch )	1121	wand->clr_flag (FLAG_ANIMATE);
932	{
933	CLEAR_FLAG(wand, FLAG_ANIMATE);
934	wand->face = wand->arch->clone.face;	1122	wand->face = wand->arch->face;
935	wand->speed = 0;	1123	wand->set_speed (0);
936	update_ob_speed(wand);
937	}
938	}	1124	}
939	/* Success */
940	return 1;
941	}	1125	}
		1126	/* Success */
		1127	return 1;
		1128	}
942	else if ( wand->type == ROD || wand->type==HORN ) {	1129	else if (wand->type == ROD || wand->type == HORN)
		1130	{
943	/* Found rod/horn, let's use it if possible */	1131	/* Found rod/horn, let's use it if possible */
944	at_least_one = 1;	1132	at_least_one = 1;
945	if( wand->stats.hp < MAX( wand->inv->stats.sp, wand->inv->stats.grace ) )	1133	if (wand->stats.hp < max (wand->inv->stats.sp, wand->inv->stats.grace))
946	continue;	1134	continue;
947		1135
948	/* drain charge before casting spell - can be a case where the	1136	/* drain charge before casting spell - can be a case where the
949	* spell destroys the monster, and rod, so if done after, results	1137	* spell destroys the monster, and rod, so if done after, results
950	* in crash.	1138	* in crash.
951	*/	1139	*/
952	drain_rod_charge( wand );	1140	drain_rod_charge (wand);
953	cast_spell( head, wand, dir, wand->inv, NULL );	1141	cast_spell (head, wand, dir, wand->inv, NULL);
954		1142
955	/* Success */	1143	/* Success */
956	return 1;	1144	return 1;
957	}	1145	}
958	}	1146	}
959		1147
960	if ( at_least_one )	1148	if (at_least_one)
961	return 0;	1149	return 0;
962		1150
963	LOG(llevError,"Error: Monster %s (%d) HAS_READY_RANG() without wand/horn/rod.\n",	1151	LOG (llevError, "Error: Monster %s (%d) HAS_READY_RANGE() without wand/horn/rod.\n", &head->name, head->count);
964	head->name,head->count);	1152	head->clr_flag (FLAG_READY_RANGE);
965	CLEAR_FLAG(head, FLAG_READY_RANGE);
966	return 0;	1153	return 0;
967	}	1154	}
968		1155
		1156	static int
969	int monster_use_bow(object *head, object *part, object *pl, int dir) {	1157	monster_use_bow (object *head, object *part, object *pl, int dir)
		1158	{
970	object *owner;	1159	object *owner;
971		1160
972	if(!(dir=path_to_player(part,pl,0)))	1161	if (!(dir = path_to_player (part, pl, 0)))
973	return 0;	1162	return 0;
974	if(QUERY_FLAG(head,FLAG_CONFUSED))
975	dir = absdir(dir + RANDOM()%3 + RANDOM()%3 - 2);
976		1163
977	if(QUERY_FLAG(head,FLAG_FRIENDLY) && (owner = get_owner(head)) != NULL) {	1164	if (head->flag [FLAG_CONFUSED])
		1165	dir = absdir (dir + rndm (3) + rndm (3) - 2);
		1166
		1167	if (head->flag [FLAG_FRIENDLY] && (owner = head->owner) != NULL)
		1168	{
978	int dir2 = find_dir_2(head->x-owner->x, head->y-owner->y);	1169	int dir2 = find_dir_2 (owner->x - head->x, owner->y - head->y);
		1170
979	if(dirdiff(dir,dir2) < 1)	1171	if (dirdiff (dir, dir2) < 1)
980	return 0; /* Might hit owner with arrow */	1172	return 0; /* Might hit owner with arrow */
981	}	1173	}
982		1174
983	/* in server/player.c */	1175	/* in server/player.c */
984	return fire_bow(head, part, NULL, dir, 0, part->x, part->y);	1176	return fire_bow (head, part, NULL, dir, 0, part->x, part->y);
985		1177
986	}	1178	}
987		1179
988	/* Checks if putting on 'item' will make 'who' do more	1180	void
989	* damage. This is a very simplistic check - also checking things	1181	npc_call_help (object *op)
990	* like speed and ac are also relevant.	1182	{
991	*	1183	unordered_mapwalk (mapwalk_buf, op, -7, -7, 7, 7)
992	* return true if item is a better object.
993	*/
994
995	int check_good_weapon(object *who, object *item) {
996	object *other_weap;
997	int val=0, i;
998
999	for(other_weap=who->inv;other_weap!=NULL;other_weap=other_weap->below)
1000	if(other_weap->type==item->type&&QUERY_FLAG(other_weap,FLAG_APPLIED))
1001	break;
1002
1003	if(other_weap==NULL) /* No other weapons */
1004	return 1;
1005
1006	/* Rather than go through and apply the new one, and see if it is
1007	* better, just do some simple checks
1008	* Put some multipliers for things that hvae several effects,
1009	* eg, magic affects both damage and wc, so it has more weight
1010	*/
1011
1012	val = item->stats.dam - other_weap->stats.dam;
1013	val += (item->magic - other_weap->magic) * 3;
1014	/* Monsters don't really get benefits from things like regen rates
1015	* from items. But the bonus for their stats are very important.
1016	*/
1017	for (i=0; i<NUM_STATS; i++)
1018	val += (get_attr_value(&item->stats, i) - get_attr_value(&other_weap->stats, i))*2;
1019
1020	if (val > 0) return 1;
1021	else return 0;
1022
1023	}
1024
1025	int check_good_armour(object *who, object *item) {
1026	object *other_armour;
1027	int val=0,i;
1028
1029	for (other_armour = who->inv; other_armour != NULL;
1030	other_armour = other_armour->below)
1031	if (other_armour->type == item->type && QUERY_FLAG(other_armour,FLAG_APPLIED))
1032	break;
1033
1034	if (other_armour == NULL) /* No other armour, use the new */
1035	return 1;
1036
1037	/* Like above function , see which is better */
1038	val = item->stats.ac - other_armour->stats.ac;
1039	val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL])/5;
1040	val += (item->magic - other_armour->magic) * 3;
1041
1042	/* for the other protections, do weigh them very much in the equation -
1043	* it is the armor protection which is most important, because there is
1044	* no good way to know what the player may attack the monster with.
1045	* So if the new item has better protection than the old, give that higher
1046	* value. If the reverse, then decrease the value of this item some.
1047	*/
1048	for (i=1; i <NROFATTACKS; i++) {
1049	if (item->resist[i] > other_armour->resist[i]) val++;
1050	else if (item->resist[i] < other_armour->resist[i]) val--;
1051	}	1184	{
		1185	mapspace &ms = m->at (nx, ny);
1052		1186
1053	/* Very few armours have stats, so not much need to worry about those. */	1187	/* If nothing alive on this space, no need to search the space. */
		1188	if (!(ms.flags () & P_IS_ALIVE))
		1189	continue;
1054		1190
1055	if (val > 0) return 1;	1191	for (object *npc = ms.bot; npc; npc = npc->above)
1056	else return 0;	1192	if (npc->flag [FLAG_ALIVE] && npc->flag [FLAG_UNAGGRESSIVE])
1057		1193	npc->enemy = op->enemy;
		1194	}
1058	}	1195	}
1059		1196
1060	/*	1197	void
1061	* monster_check_pickup(): checks for items that monster can pick up.	1198	check_earthwalls (object *op, maptile *m, int x, int y)
1062	*	1199	{
1063	* Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.	1200	for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1064	* Each time the blob passes over some treasure, it will	1201	if (tmp->type == EARTHWALL)
1065	* grab it a.s.a.p.
1066	*
1067	* Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
1068	* to handle this.
1069	*
1070	* This function was seen be continueing looping at one point (tmp->below
1071	* became a recursive loop. It may be better to call monster_check_apply
1072	* after we pick everything up, since that function may call others which
1073	* affect stacking on this space.
1074	*/
1075
1076	void monster_check_pickup(object *monster) {
1077	object *tmp,*next;
1078	int next_tag;
1079
1080	for(tmp=monster->below;tmp!=NULL;tmp=next) {
1081	next=tmp->below;
1082	next_tag = next ? next->count : 0;
1083	if (monster_can_pick(monster,tmp)) {
1084	remove_ob(tmp);
1085	tmp = insert_ob_in_ob(tmp,monster);
1086	(void) monster_check_apply(monster,tmp);
1087	}	1202	{
1088	/* We could try to re-establish the cycling, of the space, but probably	1203	hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1);
1089	* not a big deal to just bail out.
1090	*/
1091	if (next && was_destroyed(next, next_tag)) return;
1092	}
1093	}
1094
1095	/*
1096	* monster_can_pick(): If the monster is interested in picking up
1097	* the item, then return 0. Otherwise 0.
1098	* Instead of pick_up, flags for "greed", etc, should be used.
1099	* I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
1100	*/
1101
1102	int monster_can_pick(object *monster, object *item) {
1103	int flag=0;
1104	int i;
1105
1106	if(!can_pick(monster,item))
1107	return 0;
1108
1109	if(QUERY_FLAG(item,FLAG_UNPAID))
1110	return 0;
1111
1112	if (monster->pick_up&64) /* All */
1113	flag=1;
1114
1115	else switch(item->type) {
1116	case MONEY:
1117	case GEM:
1118	flag=monster->pick_up&2;
1119	break;
1120
1121	case FOOD:
1122	flag=monster->pick_up&4;
1123	break;
1124
1125	case WEAPON:
1126	flag=(monster->pick_up&8)||QUERY_FLAG(monster,FLAG_USE_WEAPON);
1127	break;
1128
1129	case ARMOUR:
1130	case SHIELD:
1131	case HELMET:
1132	case BOOTS:
1133	case GLOVES:
1134	case GIRDLE:
1135	flag=(monster->pick_up&16)||QUERY_FLAG(monster,FLAG_USE_ARMOUR);
1136	break;
1137
1138	case SKILL:
1139	flag=QUERY_FLAG(monster,FLAG_CAN_USE_SKILL);
1140	break;
1141
1142	case RING:
1143	flag=QUERY_FLAG(monster,FLAG_USE_RING);
1144	break;
1145
1146	case WAND:
1147	case HORN:
1148	case ROD:
1149	flag=QUERY_FLAG(monster,FLAG_USE_RANGE);
1150	break;
1151
1152	case SPELLBOOK:
1153	flag=(monster->arch!=NULL&&QUERY_FLAG((&monster->arch->clone),FLAG_CAST_SPELL));
1154	break;
1155
1156	case SCROLL:
1157	flag = QUERY_FLAG(monster,FLAG_USE_SCROLL);
1158	break;
1159
1160	case BOW:
1161	case ARROW:
1162	flag=QUERY_FLAG(monster,FLAG_USE_BOW);
1163	break;
1164	}
1165	/* Simplistic check - if the monster has a location to equip it, he will
1166	* pick it up. Note that this doesn't handle cases where an item may
1167	* use several locations.
1168	*/
1169	for (i=0; i < NUM_BODY_LOCATIONS; i++) {
1170	if (monster->body_info[i] && item->body_info[i]) {
1171	flag=1;
1172	break;
1173	}
1174	}
1175
1176	if (((!(monster->pick_up&32))&&flag) || ((monster->pick_up&32)&&(!flag)))
1177	return 1;
1178	return 0;
1179	}
1180
1181	/*
1182	* monster_apply_below():
1183	* Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
1184	* eager to apply things, encounters something apply-able,
1185	* then make him apply it
1186	*/
1187
1188	void monster_apply_below(object *monster) {
1189	object *tmp, *next;
1190
1191	for(tmp=monster->below;tmp!=NULL;tmp=next) {
1192	next=tmp->below;
1193	switch (tmp->type) {
1194	case CF_HANDLE:
1195	case TRIGGER:
1196	if (monster->will_apply&1)
1197	manual_apply(monster,tmp,0);
1198	break;
1199
1200	case TREASURE:
1201	if (monster->will_apply&2)
1202	manual_apply(monster,tmp,0);
1203	break;
1204
1205	}
1206	if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
1207	break;
1208	}
1209	}
1210
1211	/*
1212	* monster_check_apply() is meant to be called after an item is
1213	* inserted in a monster.
1214	* If an item becomes outdated (monster found a better item),
1215	* a pointer to that object is returned, so it can be dropped.
1216	* (so that other monsters can pick it up and use it)
1217	* Note that as things are now, monsters never drop something -
1218	* they can pick up all that they can use.
1219	*/
1220
1221	/* Sept 96, fixed this so skills will be readied -b.t.*/
1222
1223	void monster_check_apply(object *mon, object *item) {
1224
1225	int flag = 0;
1226
1227	if(item->type==SPELLBOOK&&
1228	mon->arch!=NULL&&(QUERY_FLAG((&mon->arch->clone),FLAG_CAST_SPELL))) {
1229	SET_FLAG(mon, FLAG_CAST_SPELL);
1230	return;	1204	return;
1231	}	1205	}
		1206	}
1232		1207
1233	/* If for some reason, this item is already applied, no more work to do */	1208	void
1234	if(QUERY_FLAG(item,FLAG_APPLIED)) return;	1209	check_doors (object *op, maptile *m, int x, int y)
1235		1210	{
1236	/* Might be better not to do this - if the monster can fire a bow,	1211	for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1237	* it is possible in his wanderings, he will find one to use. In	1212	if (tmp->type == DOOR)
1238	* which case, it would be nice to have ammo for it.	1213	{
1239	*/	1214	hit_player (tmp, 1000, op, AT_PHYSICAL, 1);
1240	if(QUERY_FLAG(mon,FLAG_USE_BOW) && item->type==ARROW) {
1241	/* Check for the right kind of bow */
1242	object *bow;
1243	for(bow=mon->inv;bow!=NULL;bow=bow->below)
1244	if(bow->type==BOW && bow->race==item->race) {
1245	SET_FLAG(mon, FLAG_READY_BOW);
1246	LOG(llevMonster,"Found correct bow for arrows.\n");
1247	return; /* nothing more to do for arrows */
1248	}
1249	}
1250
1251	if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE) flag=1;
1252	/* Eating food gets hp back */
1253	else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD) flag=1;
1254	else if (item->type == SCROLL && QUERY_FLAG(mon, FLAG_USE_SCROLL)) {
1255	if (!item->inv)
1256	LOG(llevDebug,"Monster %d having scroll %d with empty inventory!", mon->count, item->count);
1257	else if (monster_should_cast_spell(mon, item->inv))
1258	SET_FLAG(mon, FLAG_READY_SCROLL);
1259	/* Don't use it right now */
1260	return;	1215	return;
1261	}
1262	else if (item->type == WEAPON) flag = check_good_weapon(mon,item);
1263	else if (IS_ARMOR(item)) flag = check_good_armour(mon,item);
1264	/* Should do something more, like make sure this is a better item */
1265	else if (item->type == RING)
1266	flag=1;
1267	else if ( item->type==WAND || item->type == ROD || item->type==HORN )
1268	{
1269	/* We never really 'ready' the wand/rod/horn, because that would mean the
1270	* weapon would get undone.
1271	*/
1272	if (!(can_apply_object(mon, item) & CAN_APPLY_NOT_MASK))
1273	{
1274	SET_FLAG(mon, FLAG_READY_RANGE);
1275	SET_FLAG(item, FLAG_APPLIED);
1276	}
1277	return;
1278	}
1279	else if (item->type == BOW) {
1280	/* We never really 'ready' the bow, because that would mean the
1281	* weapon would get undone.
1282	*/
1283	if (!(can_apply_object(mon, item) & CAN_APPLY_NOT_MASK))
1284	SET_FLAG(mon, FLAG_READY_BOW);
1285	return;
1286	}
1287	else if ( item->type == SKILL )
1288	{
1289	/*
1290	* skills are specials: monsters must have the 'FLAG_READY_SKILL' flag set,
1291	* else they can't use the skill...
1292	* Skills also don't need to get applied, so return now.
1293	*/
1294	SET_FLAG(mon, FLAG_READY_SKILL);
1295	return;
1296	}
1297
1298
1299	/* if we don't match one of the above types, return now.
1300	* can_apply_object will say that we can apply things like flesh,
1301	* bolts, and whatever else, because it only checks against the
1302	* body_info locations.
1303	*/
1304	if (!flag) return;
1305
1306	/* Check to see if the monster can use this item. If not, no need
1307	* to do further processing. Note that can_apply_object already checks
1308	* for the CAN_USE flags.
1309	*/
1310	if (can_apply_object(mon, item) & CAN_APPLY_NOT_MASK) return;
1311
1312	/* should only be applying this item, not unapplying it.
1313	* also, ignore status of curse so they can take off old armour.
1314	* monsters have some advantages after all.
1315	*/
1316	manual_apply(mon, item, AP_APPLY | AP_IGNORE_CURSE);
1317
1318	return;
1319	}
1320
1321	void npc_call_help(object *op) {
1322	int x,y, mflags;
1323	object *npc;
1324	sint16 sx, sy;
1325	mapstruct *m;
1326
1327	for(x = -3; x < 4; x++)
1328	for(y = -3; y < 4; y++) {
1329	m = op->map;
1330	sx = op->x + x;
1331	sy = op->y + y;
1332	mflags = get_map_flags(m, &m, sx, sy, &sx, &sy);
1333	/* If nothing alive on this space, no need to search the space. */
1334	if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))
1335	continue;
1336
1337	for(npc = get_map_ob(m,sx,sy);npc!=NULL;npc=npc->above)
1338	if(QUERY_FLAG(npc, FLAG_ALIVE)&&QUERY_FLAG(npc, FLAG_UNAGGRESSIVE))
1339	npc->enemy = op->enemy;
1340	}
1341	}
1342
1343
1344	int dist_att (int dir , object *ob, object *enemy, object *part, rv_vector *rv) {
1345
1346	if (can_hit(part,enemy,rv))
1347	return dir;
1348	if (rv->distance < 10)
1349	return absdir(dir+4);
1350	else if (rv->distance>18)
1351	return dir;
1352	return 0;
1353	}
1354
1355	int run_att (int dir, object *ob, object *enemy,object *part, rv_vector *rv) {
1356
1357	if ((can_hit (part,enemy,rv) && ob->move_status <20) || ob->move_status <20) {
1358	ob->move_status++;
1359	return (dir);
1360	}
1361	else if (ob->move_status >20)
1362	ob->move_status = 0;
1363	return absdir (dir+4);
1364	}
1365
1366	int hitrun_att (int dir, object *ob,object *enemy) {
1367	if (ob->move_status ++ < 25)
1368	return dir;
1369	else if (ob->move_status <50)
1370	return absdir (dir+4);
1371	else
1372	ob->move_status = 0;
1373	return absdir(dir+4);
1374	}
1375
1376	int wait_att (int dir, object *ob,object *enemy,object *part,rv_vector *rv) {
1377
1378	int inrange = can_hit (part, enemy,rv);
1379		1216	}
1380	if (ob->move_status || inrange)
1381	ob->move_status++;
1382
1383	if (ob->move_status == 0)
1384	return 0;
1385	else if (ob->move_status <10)
1386	return dir;
1387	else if (ob->move_status <15)
1388	return absdir(dir+4);
1389	ob->move_status = 0;
1390	return 0;
1391	}
1392
1393	int disthit_att (int dir, object *ob, object *enemy, object *part,rv_vector *rv) {
1394
1395	/* The logic below here looked plain wrong before. Basically, what should
1396	* happen is that if the creatures hp percentage falls below run_away,
1397	* the creature should run away (dir+4)
1398	* I think its wrong for a creature to have a zero maxhp value, but
1399	* at least one map has this set, and whatever the map contains, the
1400	* server should try to be resilant enough to avoid the problem
1401	*/
1402	if (ob->stats.maxhp && (ob->stats.hp*100)/ob->stats.maxhp < ob->run_away)
1403	return absdir(dir+4);
1404	return dist_att (dir,ob,enemy,part,rv);
1405	}
1406
1407	int wait_att2 (int dir, object *ob,object *enemy,object *part, rv_vector *rv) {
1408	if (rv->distance < 9)
1409	return absdir (dir+4);
1410	return 0;
1411	}
1412
1413	void circ1_move (object *ob) {
1414	static int circle [12] = {3,3,4,5,5,6,7,7,8,1,1,2};
1415	if(++ob->move_status > 11)
1416	ob->move_status = 0;
1417	if (!(move_object(ob,circle[ob->move_status])))
1418	(void) move_object(ob,RANDOM()%8+1);
1419	}
1420
1421	void circ2_move (object *ob) {
1422	static int circle[20] = {3,3,3,4,4,5,5,5,6,6,7,7,7,8,8,1,1,1,2,2};
1423	if(++ob->move_status > 19)
1424	ob->move_status = 0;
1425	if(!(move_object(ob,circle[ob->move_status])))
1426	(void) move_object(ob,RANDOM()%8+1);
1427	}
1428
1429	void pace_movev(object *ob) {
1430	if (ob->move_status++ > 6)
1431	ob->move_status = 0;
1432	if (ob->move_status < 4)
1433	(void) move_object (ob,5);
1434	else
1435	(void) move_object(ob,1);
1436	}
1437
1438	void pace_moveh (object *ob) {
1439	if (ob->move_status++ > 6)
1440	ob->move_status = 0;
1441	if (ob->move_status < 4)
1442	(void) move_object(ob,3);
1443	else
1444	(void) move_object(ob,7);
1445	}
1446
1447	void pace2_movev (object *ob) {
1448	if (ob->move_status ++ > 16)
1449	ob->move_status = 0;
1450	if (ob->move_status <6)
1451	(void) move_object (ob,5);
1452	else if (ob->move_status < 8)
1453	return;
1454	else if (ob->move_status <13)
1455	(void) move_object (ob,1);
1456	else return;
1457	}
1458
1459	void pace2_moveh (object *ob) {
1460	if (ob->move_status ++ > 16)
1461	ob->move_status = 0;
1462	if (ob->move_status <6)
1463	(void) move_object (ob,3);
1464	else if (ob->move_status < 8)
1465	return;
1466	else if (ob->move_status <13)
1467	(void) move_object (ob,7);
1468	else return;
1469	}
1470
1471	void rand_move (object *ob) {
1472	int i;
1473	if (ob->move_status <1 || ob->move_status >8 ||
1474	!(move_object(ob,ob->move_status|| ! (RANDOM()% 9))))
1475	for (i = 0; i < 5; i++)
1476	if (move_object(ob,ob->move_status = RANDOM()%8+1))
1477	return;
1478	}
1479
1480	void check_earthwalls(object *op, mapstruct *m, int x, int y) {
1481	object *tmp;
1482	for (tmp = get_map_ob(m, x, y); tmp!=NULL; tmp=tmp->above) {
1483	if (tmp->type == EARTHWALL) {
1484	hit_player(tmp,op->stats.dam,op,AT_PHYSICAL,1);
1485	return;
1486	}
1487	}
1488	}
1489
1490	void check_doors(object *op, mapstruct *m, int x, int y) {
1491	object *tmp;
1492	for (tmp = get_map_ob(m, x, y); tmp!=NULL; tmp=tmp->above) {
1493	if (tmp->type == DOOR) {
1494	hit_player(tmp,1000,op,AT_PHYSICAL,1);
1495	return;
1496	}
1497	}
1498	}	1217	}
1499		1218
1500	/* find_mon_throw_ob() - modeled on find_throw_ob	1219	/* find_mon_throw_ob() - modeled on find_throw_ob
1501	* This is probably overly simplistic as it is now - We want	1220	* This is probably overly simplistic as it is now - We want
1502	* monsters to throw things like chairs and other pieces of	1221	* monsters to throw things like chairs and other pieces of
1503	* furniture, even if they are not good throwable objects.	1222	* furniture, even if they are not good throwable objects.
1504	* Probably better to have the monster throw a throwable object	1223	* Probably better to have the monster throw a throwable object
1505	* first, then throw any non equipped weapon.	1224	* first, then throw any non equipped weapon.
1506	*/	1225	*/
1507		1226	object *
1508	object *find_mon_throw_ob( object *op ) {	1227	find_mon_throw_ob (object *op)
		1228	{
1509	object *tmp = NULL;	1229	object *tmp = NULL;
1510
1511	if(op->head) tmp=op->head; else tmp=op;
1512		1230
		1231	if (op->head)
		1232	tmp = op->head;
		1233	else
		1234	tmp = op;
		1235
1513	/* New throw code: look through the inventory. Grap the first legal is_thrown	1236	/* New throw code: look through the inventory. Grap the first legal is_thrown
1514	* marked item and throw it to the enemy.	1237	* marked item and throw it to the enemy.
1515	*/	1238	*/
1516
1517	for(tmp=op->inv;tmp;tmp=tmp->below) {	1239	for (tmp = op->inv; tmp; tmp = tmp->below)
1518		1240	{
1519	/* Can't throw invisible objects or items that are applied */	1241	/* Can't throw invisible objects or items that are applied */
1520	if(tmp->invisible || QUERY_FLAG(tmp,FLAG_APPLIED)) continue;	1242	if (tmp->invisible || tmp->flag [FLAG_APPLIED])
		1243	continue;
1521		1244
1522	if(QUERY_FLAG(tmp,FLAG_IS_THROWN))	1245	if (tmp->flag [FLAG_IS_THROWN])
1523	break;	1246	break;
1524		1247
1525	}	1248	}
1526		1249
1527	#ifdef DEBUG_THROW	1250	#ifdef DEBUG_THROW
1528	LOG(llevDebug,"%s chooses to throw: %s (%d)\n",op->name,	1251	LOG (llevDebug, "%s chooses to throw: %s (%d)\n", op->name, !(tmp) ? "(nothing)" : query_name (tmp), tmp ? tmp->count : -1);
1529	!(tmp)?"(nothing)":query_name(tmp),tmp?tmp->count:-1);
1530	#endif	1252	#endif
1531		1253
1532	return tmp;	1254	return tmp;
		1255	}
		1256
		1257	/*
		1258	* Move-monster returns 1 if the object has been freed, otherwise 0.
		1259	*/
		1260	int
		1261	move_monster (object *op)
		1262	{
		1263	int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */
		1264	object *owner, *enemy, *part, *oph = op;
		1265	rv_vector rv;
		1266
		1267	/* Monsters not on maps don't do anything. These monsters are things
		1268	* Like royal guards in city dwellers inventories.
		1269	*/
		1270	if (!op->map)
		1271	return 0;
		1272
		1273	/* for target facing, we copy this value here for fast access */
		1274	if (oph->head) /* force update the head - one arch one pic */
		1275	oph = oph->head;
		1276
		1277	if (op->flag [FLAG_NO_ATTACK]) /* we never ever attack */
		1278	enemy = op->enemy = NULL;
		1279	else if ((enemy = find_enemy (op, &rv)))
		1280	/* we have an enemy, just tell him we want him dead */
		1281	enemy->attacked_by = op; /* our ptr */
		1282
		1283	/* generate hp, if applicable */
		1284	if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
		1285	{
		1286	/* last heal is in funny units. Dividing by speed puts
		1287	* the regeneration rate on a basis of time instead of
		1288	* #moves the monster makes. The scaling by 8 is
		1289	* to capture 8th's of a hp fraction regens
		1290	*/
		1291	uint32_t last_heal = op->last_heal + op->stats.Con * 8 / op->speed;
		1292	op->stats.hp = min (op->stats.hp + last_heal / 32, op->stats.maxhp); /* causes Con/4 hp/tick */
		1293	op->last_heal = last_heal % 32;
		1294
		1295	/* So if the monster has gained enough HP that they are no longer afraid */
		1296	if (op->flag [FLAG_RUN_AWAY] && op->stats.hp * 100 >= op->stats.maxhp * op->run_away)
		1297	op->flag [FLAG_RUN_AWAY] = false;
		1298	}
		1299
		1300	/* generate sp, if applicable */
		1301	if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
		1302	{
		1303	/* last_sp is in funny units. Dividing by speed puts
		1304	* the regeneration rate on a basis of time instead of
		1305	* #moves the monster makes. The scaling by 8 is
		1306	* to capture 8th's of a sp fraction regens
		1307	*/
		1308
		1309	uint32_t last_sp = op->last_sp + op->stats.Pow * 8 / op->speed;
		1310	op->stats.sp = min (op->stats.sp + last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
		1311	op->last_sp = last_sp % 128;
		1312	}
		1313
		1314	/* this should probably get modified by many more values.
		1315	* (eg, creatures resistance to fear, level, etc. )
		1316	*/
		1317	if (op->flag [FLAG_SCARED] && !(rndm (20)))
		1318	op->clr_flag (FLAG_SCARED); /* Time to regain some "guts"... */
		1319
		1320	if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
		1321	return op->flag [FLAG_FREED];
		1322
		1323	if (op->flag [FLAG_SLEEP] || op->flag [FLAG_BLIND] ||
		1324	((op->map->darklevel () > 0) && !op->flag [FLAG_SEE_IN_DARK] && !op->flag [FLAG_SEE_INVISIBLE]))
		1325	if (!check_wakeup (op, enemy, &rv))
		1326	return 0;
		1327
		1328	/* check if monster pops out of hidden spot */
		1329	if (op->flag [FLAG_HIDDEN])
		1330	do_hidden_move (op);
		1331
		1332	if (op->pick_up)
		1333	monster_check_pickup (op);
		1334
		1335	if (op->will_apply)
		1336	monster_apply_below (op); /* Check for items to apply below */
		1337
		1338	/* If we don't have an enemy, do special movement or the like */
		1339	if (!enemy)
		1340	{
		1341	if (op->flag [FLAG_ONLY_ATTACK])
		1342	{
		1343	op->drop_and_destroy ();
		1344	return 1;
		1345	}
		1346
		1347	/* Probably really a bug for a creature to have both
		1348	* stand still and a movement type set.
		1349	*/
		1350	if (!op->flag [FLAG_STAND_STILL])
		1351	{
		1352	if (op->attack_movement & HI4)
		1353	{
		1354	switch (op->attack_movement & HI4)
		1355	{
		1356	case PETMOVE:
		1357	pet_move (op);
		1358	break;
		1359
		1360	case CIRCLE1:
		1361	circ1_move (op);
		1362	break;
		1363
		1364	case CIRCLE2:
		1365	circ2_move (op);
		1366	break;
		1367
		1368	case PACEV:
		1369	pace_movev (op);
		1370	break;
		1371
		1372	case PACEH:
		1373	pace_moveh (op);
		1374	break;
		1375
		1376	case PACEV2:
		1377	pace2_movev (op);
		1378	break;
		1379
		1380	case PACEH2:
		1381	pace2_moveh (op);
		1382	break;
		1383
		1384	case RANDO:
		1385	rand_move (op);
		1386	break;
		1387
		1388	case RANDO2:
		1389	move_randomly (op);
		1390	break;
		1391	}
		1392
		1393	return 0;
		1394	}
		1395	else if (op->flag [FLAG_RANDOM_MOVE])
		1396	move_randomly (op);
		1397	} /* stand still */
		1398
		1399	return 0;
		1400	} /* no enemy */
		1401
		1402	/* We have an enemy. Block immediately below is for pets */
		1403	if ((op->attack_movement & HI4) == PETMOVE
		1404	&& (owner = op->owner) != NULL
		1405	&& !on_same_map (op, owner)
		1406	&& !owner->flag [FLAG_REMOVED])
		1407	return follow_owner (op, owner);
		1408
		1409	/* doppleganger code to change monster facing to that of the nearest
		1410	* player. Hmm. The code is here, but no monster in the current
		1411	* arch set uses it.
		1412	*/
		1413	if (op->race == shstr_doppleganger)
		1414	{
		1415	op->face = enemy->face;
		1416	op->name = enemy->name;
		1417	}
		1418
		1419	/* Calculate range information for closest body part - this
		1420	* is used for the 'skill' code, which isn't that smart when
		1421	* it comes to figuring it out - otherwise, giants throw boulders
		1422	* into themselves.
		1423	*/
		1424	get_rangevector (op, enemy, &rv, 0);
		1425
		1426	/* Move the check for scared up here - if the monster was scared,
		1427	* we were not doing any of the logic below, so might as well save
		1428	* a few cpu cycles.
		1429	*/
		1430	if (!op->flag [FLAG_SCARED])
		1431	{
		1432	rv_vector rv1;
		1433
		1434	/* now we test every part of an object .... this is a real ugly piece of code */
		1435	for (part = op; part; part = part->more)
		1436	{
		1437	get_rangevector (part, enemy, &rv1, 0x1);
		1438	dir = rv1.direction;
		1439
		1440	/* hm, not sure about this part - in original was a scared flag here too
		1441	* but that we test above... so can be old code here
		1442	*/
		1443	if (op->flag [FLAG_RUN_AWAY])
		1444	dir = absdir (dir + 4);
		1445
		1446	if (op->flag [FLAG_CONFUSED])
		1447	dir = absdir (dir + rndm (3) + rndm (3) - 2);
		1448
		1449	if (op->flag [FLAG_CAST_SPELL] && !(rndm (3)))
		1450	if (monster_cast_spell (op, part, enemy, dir, &rv1))
		1451	return 0;
		1452
		1453	if (op->flag [FLAG_READY_SCROLL] && !(rndm (3)))
		1454	if (monster_use_scroll (op, part, enemy, dir, &rv1))
		1455	return 0;
		1456
		1457	if (op->flag [FLAG_READY_RANGE] && !(rndm (3)))
		1458	if (monster_use_range (op, part, enemy, dir))
		1459	return 0;
		1460
		1461	if (op->flag [FLAG_READY_SKILL] && !(rndm (3)))
		1462	if (monster_use_skill (op, rv.part, enemy, rv.direction))
		1463	return 0;
		1464
		1465	if (op->flag [FLAG_READY_BOW] && !(rndm (2)))
		1466	if (monster_use_bow (op, part, enemy, dir))
		1467	return 0;
		1468	} /* for processing of all parts */
		1469	} /* If not scared */
		1470
		1471	part = rv.part;
		1472	dir = rv.direction;
		1473
		1474	//-GPL
		1475
		1476	// if the enemy is a player, we have los. if los says we
		1477	// can directly reach the player, we do not deviate.
		1478	// for non-players, we never deviate
		1479	if (op->stats.Wis >= 8
		1480	&& enemy->contr && enemy->contr->darkness_at (op->map, op->x, op->y) == LOS_BLOCKED)
		1481	{
		1482	int sdir = 0;
		1483	uint32_t &smell = op->ms ().smell;
		1484
		1485	for (int ndir = 1; ndir <= 8; ++ndir)
		1486	{
		1487	mapxy pos (op); pos.move (ndir);
		1488
		1489	if (pos.normalise ())
		1490	{
		1491	mapspace &ms = pos.ms ();
		1492
		1493	if (ms.smell > smell)
		1494	{
		1495	//printf ("%s: found smell, following it, apparently (%d, %d)\n",& op->name,op->ms().smell,ms.smell);//D
		1496	if (op->stats.Wis >= 10)
		1497	smell = ms.smell - 1; // smarter: tell others
		1498
		1499	sdir = ndir;
		1500
		1501	// perturbing the path might let the monster lose track,
		1502	// but it will also widen the actual path, spreading information
		1503	if (op->stats.Wis >= 15 && !rndm (20)) // even smarter, deviate and spread?
		1504	sdir = absdir (sdir + 1 - rndm (2) * 2);
		1505	}
		1506	}
		1507	}
		1508
		1509	if (sdir)
		1510	dir = sdir;
		1511	else if (smell)
		1512	{
		1513	// no better smell found, so assume the player jumped, and erase this smell
		1514	//printf ("erasing smell %d\n", op->ms ().smell);//D
		1515	unordered_mapwalk (mapwalk_buf, op, -1, -1, 1, 1)
		1516	m->at (nx, ny).smell = 0;
		1517	}
		1518	}
		1519
		1520	//+GPL
		1521
		1522	if (op->flag [FLAG_SCARED] || op->flag [FLAG_RUN_AWAY])
		1523	dir = absdir (dir + 4);
		1524
		1525	if (op->flag [FLAG_CONFUSED])
		1526	dir = absdir (dir + rndm (3) + rndm (3) - 2);
		1527
		1528	pre_att_dir = dir; /* remember the original direction */
		1529
		1530	if ((op->attack_movement & LO4) && !op->flag [FLAG_SCARED])
		1531	{
		1532	switch (op->attack_movement & LO4)
		1533	{
		1534	case DISTATT:
		1535	dir = dist_att (dir, op, enemy, part, &rv);
		1536	break;
		1537
		1538	case RUNATT:
		1539	dir = run_att (dir, op, enemy, part, &rv);
		1540	break;
		1541
		1542	case HITRUN:
		1543	dir = hitrun_att (dir, op, enemy);
		1544	break;
		1545
		1546	case WAITATT:
		1547	dir = wait_att (dir, op, enemy, part, &rv);
		1548	break;
		1549
		1550	case RUSH: /* default - monster normally moves towards player */
		1551	case ALLRUN:
		1552	break;
		1553
		1554	case DISTHIT:
		1555	dir = disthit_att (dir, op, enemy, part, &rv);
		1556	break;
		1557
		1558	case WAIT2:
		1559	dir = wait_att2 (dir, op, enemy, part, &rv);
		1560	break;
		1561
		1562	default:
		1563	LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
		1564	}
		1565	}
		1566
		1567	if (!dir)
		1568	return 0;
		1569
		1570	if (!op->flag [FLAG_STAND_STILL])
		1571	{
		1572	if (op->move (dir)) /* Can the monster move directly toward player? */
		1573	{
		1574	/* elmex: Turn our monster after it moved if it has DISTATT attack */
		1575	if ((op->attack_movement & LO4) == DISTATT)
		1576	op->direction = pre_att_dir;
		1577
		1578	return 0;
		1579	}
		1580
		1581	if (op->flag [FLAG_SCARED] || !can_hit (part, enemy, &rv) || op->flag [FLAG_RUN_AWAY])
		1582	{
		1583	/* Try move around corners if !close */
		1584	int maxdiff = (op->flag [FLAG_ONLY_ATTACK] || rndm (2)) ? 1 : 2;
		1585
		1586	for (diff = 1; diff <= maxdiff; diff++)
		1587	{
		1588	/* try different detours */
		1589	int m = 1 - rndm (2) * 2; /* Try left or right first? */
		1590
		1591	if (op->move (absdir (dir + diff * m)) || op->move (absdir (dir - diff * m)))
		1592	return 0;
		1593	}
		1594	}
		1595	} /* if monster is not standing still */
		1596
		1597	/* elmex: Turn our monster after it moved if it has DISTATT attack */
		1598	if ((op->attack_movement & LO4) == DISTATT)
		1599	op->direction = pre_att_dir;
		1600
		1601	/*
		1602	* Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
		1603	* direction if they can't move away.
		1604	*/
		1605	if (!op->flag [FLAG_ONLY_ATTACK] && (op->flag [FLAG_RUN_AWAY] || op->flag [FLAG_SCARED]))
		1606	if (move_randomly (op))
		1607	return 0;
		1608
		1609	/*
		1610	* Try giving the monster a new enemy - the player that is closest
		1611	* to it. In this way, it won't just keep trying to get to a target
		1612	* that is inaccessible.
		1613	* This could be more clever - it should go through a list of several
		1614	* enemies, as it is now, you could perhaps get situations where there
		1615	* are two players flanking the monster at close distance, but which
		1616	* the monster can't get to, and a third one at a far distance that
		1617	* the monster could get to - as it is, the monster won't look at that
		1618	* third one.
		1619	*/
		1620	if (!op->flag [FLAG_FRIENDLY] && enemy == op->enemy)
		1621	{
		1622	object *nearest_player = get_nearest_player (op);
		1623
		1624	if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
		1625	{
		1626	op->enemy = 0;
		1627	enemy = nearest_player;
		1628	}
		1629	}
		1630
		1631	if (!op->flag [FLAG_SCARED] && can_hit (part, enemy, &rv))
		1632	{
		1633	/* The adjustement to wc that was here before looked totally bogus -
		1634	* since wc can in fact get negative, that would mean by adding
		1635	* the current wc, the creature gets better? Instead, just
		1636	* add a fixed amount - nasty creatures that are runny away should
		1637	* still be pretty nasty.
		1638	*/
		1639	if (op->flag [FLAG_RUN_AWAY])
		1640	{
		1641	part->stats.wc += 10;
		1642	skill_attack (enemy, part, 0, NULL, NULL);
		1643	part->stats.wc -= 10;
		1644	}
		1645	else
		1646	skill_attack (enemy, part, 0, NULL, NULL);
		1647	} /* if monster is in attack range */
		1648
		1649	if (part->flag [FLAG_FREED]) /* Might be freed by ghost-attack or hit-back */
		1650	return 1;
		1651
		1652	if (op->flag [FLAG_ONLY_ATTACK])
		1653	{
		1654	op->drop_and_destroy ();
		1655	return 1;
		1656	}
		1657
		1658	return 0;
1533	}	1659	}
1534		1660
1535	/* determine if we can 'detect' the enemy. Check for walls blocking the	1661	/* determine if we can 'detect' the enemy. Check for walls blocking the
1536	* los. Also, just because its hidden/invisible, we may be sensitive/smart	1662	* los. Also, just because its hidden/invisible, we may be sensitive/smart
1537	* enough (based on Wis & Int) to figure out where the enemy is. -b.t.	1663	* enough (based on Wis & Int) to figure out where the enemy is. -b.t.
…		…
1539	* properly. I also so odd code in place that checked for x distance	1665	* properly. I also so odd code in place that checked for x distance
1540	* OR y distance being within some range - that seemed wrong - both should	1666	* OR y distance being within some range - that seemed wrong - both should
1541	* be within the valid range. MSW 2001-08-05	1667	* be within the valid range. MSW 2001-08-05
1542	* Returns 0 if enemy can not be detected, 1 if it is detected	1668	* Returns 0 if enemy can not be detected, 1 if it is detected
1543	*/	1669	*/
1544		1670	int
1545	int can_detect_enemy (object *op, object *enemy, rv_vector *rv) {	1671	can_detect_enemy (object *op, object *enemy, rv_vector * rv)
1546	int radius = MIN_MON_RADIUS, hide_discovery;	1672	{
1547
1548	/* null detection for any of these condtions always */	1673	/* null detection for any of these condtions always */
1549	if(!op || !enemy || !op->map || !enemy->map)	1674	if (!op || !enemy || !op->map || !enemy->map)
1550	return 0;	1675	return 0;
1551		1676
1552	/* If the monster (op) has no way to get to the enemy, do nothing */	1677	/* If the monster (op) has no way to get to the enemy, do nothing */
1553	if (!on_same_map(op, enemy))	1678	if (!on_same_map (op, enemy))
1554	return 0;	1679	return 0;
1555		1680
1556	get_rangevector(op, enemy, rv, 0);	1681	get_rangevector (op, enemy, rv, 0);
1557		1682
1558	/* Monsters always ignore the DM */	1683	/* Monsters always ignore the DM */
1559	if ( ( op->type != PLAYER ) && QUERY_FLAG( enemy, FLAG_WIZ ) )	1684	if (!op->is_player () && enemy->flag [FLAG_WIZ])
1560	return 0;	1685	return 0;
1561		1686
1562	/* simple check. Should probably put some range checks in here. */	1687	/* simple check. Should probably put some range checks in here. */
1563	if(can_see_enemy(op,enemy)) return 1;	1688	if (can_see_enemy (op, enemy))
		1689	return 1;
1564		1690
1565	/* The rest of this is for monsters. Players are on their own for	1691	/* The rest of this is for monsters. Players are on their own for
1566	* finding enemies!	1692	* finding enemies!
1567	*/	1693	*/
1568	if(op->type==PLAYER) return 0;	1694	if (op->is_player ())
		1695	return 0;
1569		1696
1570	/* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE	1697	/* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE
1571	* flag (which was already checked) in can_see_enmy (). Lets get out of here	1698	* flag (which was already checked) in can_see_enemy (). Lets get out of here
1572	*/	1699	*/
1573	if(enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden)))	1700	if (enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden)))
1574	return 0;	1701	return 0;
1575		1702
		1703	int radius = MIN_MON_RADIUS;
		1704
1576	/* use this for invis also */	1705	/* use this for invis also */
1577	hide_discovery = op->stats.Int/5;	1706	int hide_discovery = op->stats.Int / 5;
1578		1707
1579	/* Determine Detection radii */	1708	/* Determine Detection radii */
1580	if(!enemy->hide) /* to detect non-hidden (eg dark/invis enemy) */	1709	if (!enemy->flag [FLAG_HIDDEN]) /* to detect non-hidden (eg dark/invis enemy) */
1581	radius = (op->stats.Wis/5)+1>MIN_MON_RADIUS?(op->stats.Wis/5)+1:MIN_MON_RADIUS;	1710	radius = max (MIN_MON_RADIUS, op->stats.Wis / 3 + 1);
		1711	else
1582	else { /* a level/INT/Dex adjustment for hiding */	1712	{ /* a level/INT/Dex adjustment for hiding */
1583	object *sk_hide;
1584	int bonus = (op->level/2) + (op->stats.Int/5);	1713	int bonus = op->level / 2 + op->stats.Int / 5;
1585		1714
1586	if(enemy->type==PLAYER) {	1715	if (enemy->is_player ())
		1716	{
1587	if((sk_hide = find_skill_by_number(enemy,SK_HIDING)))	1717	if (object *sk_hide = find_skill_by_number (enemy, SK_HIDING))
1588	bonus -= sk_hide->level;	1718	bonus -= sk_hide->level;
1589	else {	1719	else
		1720	{
1590	LOG(llevError,"can_detect_enemy() got hidden player w/o hiding skill!\n");	1721	LOG (llevError, "can_detect_enemy() got hidden player w/o hiding skill!\n");
1591	make_visible(enemy);	1722	make_visible (enemy);
1592	radius=radius<MIN_MON_RADIUS?MIN_MON_RADIUS:radius;	1723	radius = radius < MIN_MON_RADIUS ? MIN_MON_RADIUS : radius;
1593	}	1724	}
1594	}	1725	}
1595	else /* enemy is not a player */	1726	else /* enemy is not a player */
1596	bonus -= enemy->level;	1727	bonus -= enemy->level;
1597		1728
1598	radius += bonus/5;	1729	radius += bonus / 5;
1599	hide_discovery += bonus*5;	1730	hide_discovery += bonus * 5;
1600	} /* else creature has modifiers for hiding */	1731	} /* else creature has modifiers for hiding */
1601		1732
1602	/* Radii stealth adjustment. Only if you are stealthy	1733	/* Radii stealth adjustment. Only if you are stealthy
1603	* will you be able to sneak up closer to creatures */	1734	* will you be able to sneak up closer to creatures */
1604	if(QUERY_FLAG(enemy,FLAG_STEALTH))	1735	if (enemy->flag [FLAG_STEALTH])
1605	radius = radius/2, hide_discovery = hide_discovery/3;	1736	{
		1737	radius /= 2;
		1738	hide_discovery /= 3;
		1739	}
1606		1740
1607	/* Radii adjustment for enemy standing in the dark */	1741	/* Radii adjustment for enemy standing in the dark */
1608	if(op->map->darkness>0 && !stand_in_light(enemy)) {	1742	if (!stand_in_light (enemy))
		1743	{
1609	/* on dark maps body heat can help indicate location with infravision	1744	/* on dark maps body heat can help indicate location with infravision
1610	* undead don't have body heat, so no benefit detecting them.	1745	* undead don't have body heat, so no benefit detecting them.
1611	*/	1746	*/
1612	if(QUERY_FLAG(op,FLAG_SEE_IN_DARK) && !is_true_undead(enemy))	1747	if (op->flag [FLAG_SEE_IN_DARK] && !is_true_undead (enemy))
1613	radius += op->map->darkness/2;	1748	radius += op->map->darklevel () / 2;
1614	else	1749	else
1615	radius -= op->map->darkness/2;	1750	radius -= op->map->darklevel () / 2;
1616		1751
1617	/* op next to a monster (and not in complete darkness)	1752	/* op next to a monster (and not in complete darkness)
1618	* the monster should have a chance to see you.	1753	* the monster should have a chance to see you.
1619	*/	1754	*/
1620	if(radius<MIN_MON_RADIUS && op->map->darkness<5 && rv->distance<=1)	1755	if (radius < MIN_MON_RADIUS && op->map->darklevel () < MAX_DARKNESS && rv->distance <= 1)
1621	radius = MIN_MON_RADIUS;	1756	radius = MIN_MON_RADIUS;
1622	} /* if on dark map */	1757	} /* if on dark map */
1623		1758
1624	/* Lets not worry about monsters that have incredible detection	1759	/* Lets not worry about monsters that have incredible detection
1625	* radii, we only need to worry here about things the player can	1760	* radii, we only need to worry here about things the player can
1626	* (potentially) see. This is 13, as that is the maximum size the player	1761	* (potentially) see. This is 13, as that is the maximum size the player
1627	* may have for their map - in that way, creatures at the edge will	1762	* may have for their map - in that way, creatures at the edge will
1628	* do something. Note that the distance field in the	1763	* do something. Note that the distance field in the
1629	* vector is real distance, so in theory this should be 18 to	1764	* vector is real distance, so in theory this should be 18 to
1630	* find that.	1765	* find that.
1631	*/	1766	*/
1632	if(radius>13) radius = 13;	1767	// note that the above reasoning was utter bullshit even at the time it was written
		1768	// we use 25, lets see if we have the cpu time for it
		1769	radius = min (25, radius);
1633		1770
1634	/* Enemy in range! Now test for detection */	1771	/* Enemy in range! Now test for detection */
1635	if ((int) rv->distance <= radius) {	1772	if (rv->distance <= radius)
		1773	{
1636	/* ah, we are within range, detected? take cases */	1774	/* ah, we are within range, detected? take cases */
1637	if(!enemy->invisible) /* enemy in dark squares... are seen! */	1775	if (!enemy->invisible) /* enemy in dark squares... are seen! */
1638	return 1;	1776	return 1;
1639		1777
1640	/* hidden or low-quality invisible */	1778	/* hidden or low-quality invisible */
1641	if(enemy->hide && (rv->distance <= 1) && (RANDOM()%100<=hide_discovery)) {	1779	if (enemy->flag [FLAG_HIDDEN] && rv->distance <= 1 && rndm (100) <= hide_discovery)
		1780	{
1642	make_visible(enemy);	1781	make_visible (enemy);
		1782
1643	/* inform players of new status */	1783	/* inform players of new status */
1644	if(enemy->type==PLAYER && player_can_view(enemy,op))	1784	if (enemy->type == PLAYER && player_can_view (enemy, op))
1645	new_draw_info_format(NDI_UNIQUE,0, enemy,	1785	new_draw_info_format (NDI_UNIQUE, 0, enemy, "You are discovered by %s!", &op->name);
1646	"You are discovered by %s!",op->name);	1786
1647	return 1; /* detected enemy */	1787	return 1; /* detected enemy */
1648	}	1788	}
1649	else if (enemy->invisible) {	1789	else if (enemy->invisible)
		1790	{
1650	/* Change this around - instead of negating the invisible, just	1791	/* Change this around - instead of negating the invisible, just
1651	* return true so that the mosnter that managed to detect you can	1792	* return true so that the monster that managed to detect you can
1652	* do something to you. Decreasing the duration of invisible	1793	* do something to you. Decreasing the duration of invisible
1653	* doesn't make a lot of sense IMO, as a bunch of stupid creatures	1794	* doesn't make a lot of sense IMO, as a bunch of stupid creatures
1654	* can then basically negate the spell. The spell isn't negated -	1795	* can then basically negate the spell. The spell isn't negated -
1655	* they just know where you are!	1796	* they just know where you are!
1656	*/	1797	*/
1657	if ((RANDOM() % 50) <= hide_discovery) {	1798	if (rndm (50) <= hide_discovery)
		1799	{
1658	if (enemy->type == PLAYER) {	1800	if (enemy->type == PLAYER)
1659	new_draw_info_format(NDI_UNIQUE,0, enemy,	1801	new_draw_info_format (NDI_UNIQUE, 0, enemy, "You see %s noticing your position.", query_name (op));
1660	"You see %s noticing your position.", query_name(op));	1802
1661	}
1662	return 1;	1803	return 1;
1663	}	1804	}
1664	}	1805	}
1665	} /* within range */	1806	} /* within range */
1666		1807
1667	/* Wasn't detected above, so still hidden */	1808	/* Wasn't detected above, so still hidden */
1668	return 0;	1809	return 0;
1669	}	1810	}
1670		1811
1671	/* determine if op stands in a lighted square. This is not a very	1812	/* determine if op stands in a lighted square. This is not a very
1672	* intellegent algorithm. For one thing, we ignore los here, SO it	1813	* intelligent algorithm. For one thing, we ignore los here, SO it
1673	* is possible for a bright light to illuminate a player on the	1814	* is possible for a bright light to illuminate a player on the
1674	* other side of a wall (!).	1815	* other side of a wall (!).
1675	*/	1816	*/
1676		1817	int
1677	int stand_in_light( object *op) {	1818	stand_in_light (object *op)
1678	sint16 nx,ny;	1819	{
1679	mapstruct *m;	1820	if (op)
		1821	{
		1822	if (!op->is_on_map ())
		1823	return 0;
1680		1824
		1825	if (op->map->darklevel () <= 0)
		1826	return 1;
1681		1827
1682	if(!op) return 0;
1683	if(op->glow_radius > 0) return 1;	1828	if (op->glow_radius > 0)
		1829	return 1;
1684		1830
1685	if(op->map) {	1831	if (op->map)
1686	int x, y, x1, y1;	1832	unordered_mapwalk (mapwalk_buf, op, -MAX_LIGHT_RADIUS, -MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS)
1687		1833	{
1688		1834	mapspace &ms = m->at (nx, ny);
1689		1835
		1836	ms.update ();
		1837
1690	/* Check the spaces with the max light radius to see if any of them	1838	/* Check the spaces with the max light radius to see if any of them
1691	* have lights, and if any of them light the player enough, then return 1.	1839	* have lights, and if any of them light the player enough, then return 1.
1692	*/	1840	*/
1693	for (x = op->x - MAX_LIGHT_RADII; x <= op->x + MAX_LIGHT_RADII; x++) {	1841	int light = ms.light;
1694	for (y = op->y - MAX_LIGHT_RADII; y <= op->y + MAX_LIGHT_RADII; y++) {
1695	m = op->map;
1696	nx = x;
1697	ny = y;
1698		1842
1699	if (get_map_flags(m, &m, nx, ny, &nx, &ny) & P_OUT_OF_MAP) continue;	1843	if (expect_false (light > 0) && idistance (dx, dy) <= light)
1700		1844	return 1;
1701	x1 = abs(x - op->x)*abs(x - op->x);
1702	y1 = abs(y - op->y)*abs(y - op->y);
1703	if (isqrt(x1 + y1) < GET_MAP_LIGHT(m, nx, ny)) return 1;
1704	}	1845	}
1705	}
1706	}	1846	}
		1847
1707	return 0;	1848	return 0;
1708	}	1849	}
1709
1710		1850
1711	/* assuming no walls/barriers, lets check to see if its *possible*	1851	/* assuming no walls/barriers, lets check to see if its *possible*
1712	* to see an enemy. Note, "detection" is different from "seeing".	1852	* to see an enemy. Note, "detection" is different from "seeing".
1713	* See can_detect_enemy() for more details. -b.t.	1853	* See can_detect_enemy() for more details. -b.t.
1714	* return 0 if can't be seen, 1 if can be	1854	* return 0 if can't be seen, 1 if can be
1715	*/	1855	*/
1716		1856	int
1717	int can_see_enemy (object *op, object *enemy) {	1857	can_see_enemy (object *op, object *enemy)
		1858	{
1718	object *looker = op->head?op->head:op;	1859	object *looker = op->head ? op->head : op;
1719		1860
1720	/* safety */	1861	/* safety */
1721	if(!looker||!enemy||!QUERY_FLAG(looker,FLAG_ALIVE))	1862	if (!looker || !enemy || !looker->flag [FLAG_ALIVE])
1722	return 0;	1863	return 0;
1723		1864
1724	/* we dont give a full treatment of xrays here (shorter range than normal,	1865	/* we dont give a full treatment of xrays here (shorter range than normal,
1725	* see through walls). Should we change the code elsewhere to make you	1866	* see through walls). Should we change the code elsewhere to make you
1726	* blind even if you can xray?	1867	* blind even if you can xray?
1727	*/	1868	*/
1728	if(QUERY_FLAG(looker,FLAG_BLIND) && !QUERY_FLAG(looker,FLAG_XRAYS))	1869	if (looker->flag [FLAG_BLIND] && !looker->flag [FLAG_XRAYS])
1729	return 0;	1870	return 0;
1730		1871
1731	/* checking for invisible things */	1872	/* checking for invisible things */
1732	if(enemy->invisible) {	1873	if (enemy->invisible)
		1874	{
1733	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!	1875	/* HIDDEN ENEMY. by definition, you can't see hidden stuff!
1734	* However,if you carry any source of light, then the hidden	1876	* However,if you carry any source of light, then the hidden
1735	* creature is seeable (and stupid) */	1877	* creature is seeable (and stupid) */
1736		1878
1737	if(has_carried_lights(enemy)) {	1879	if (enemy->has_carried_lights ())
1738	if(enemy->hide) {	1880	{
		1881	if (enemy->flag [FLAG_HIDDEN])
		1882	{
1739	make_visible(enemy);	1883	make_visible (enemy);
1740	new_draw_info(NDI_UNIQUE,0, enemy,	1884	new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!");
1741	"Your light reveals your hiding spot!");
1742	}	1885	}
		1886
1743	return 1;	1887	return 1;
1744	} else if (enemy->hide) return 0;	1888	}
		1889	else if (enemy->flag [FLAG_HIDDEN])
		1890	return 0;
1745		1891
1746	/* Invisible enemy. Break apart the check for invis undead/invis looker	1892	/* Invisible enemy. Break apart the check for invis undead/invis looker
1747	* into more simple checks - the QUERY_FLAG doesn't return 1/0 values,	1893	* into more simple checks - the QUERY_FLAG doesn't return 1/0 values,
1748	* and making it a conditional makes the code pretty ugly.	1894	* and making it a conditional makes the code pretty ugly.
1749	*/	1895	*/
1750	if (!QUERY_FLAG(looker,FLAG_SEE_INVISIBLE)) {	1896	if (!looker->flag [FLAG_SEE_INVISIBLE])
1751	if (makes_invisible_to(enemy, looker)) return 0;	1897	if (makes_invisible_to (enemy, looker))
1752	}	1898	return 0;
		1899	}
1753	} else if(looker->type==PLAYER) /* for players, a (possible) shortcut */	1900	else if (looker->is_player ()) /* for players, a (possible) shortcut */
1754	if(player_can_view(looker,enemy)) return 1;	1901	if (player_can_view (looker, enemy))
		1902	return 1;
1755		1903
1756	/* ENEMY IN DARK MAP. Without infravision, the enemy is not seen	1904	/* ENEMY IN DARK MAP. Without infravision, the enemy is not seen
1757	* unless they carry a light or stand in light. Darkness doesnt	1905	* unless they carry a light or stand in light. Darkness doesnt
1758	* inhibit the undead per se (but we should give their archs	1906	* inhibit the undead per se (but we should give their archs
1759	* CAN_SEE_IN_DARK, this is just a safety	1907	* CAN_SEE_IN_DARK, this is just a safety
1760	* we care about the enemy maps status, not the looker.	1908	* we care about the enemy maps status, not the looker.
1761	* only relevant for tiled maps, but it is possible that the	1909	* only relevant for tiled maps, but it is possible that the
1762	* enemy is on a bright map and the looker on a dark - in that	1910	* enemy is on a bright map and the looker on a dark - in that
1763	* case, the looker can still see the enemy	1911	* case, the looker can still see the enemy
1764	*/	1912	*/
1765	if(enemy->map->darkness>0&&!stand_in_light(enemy)	1913	if (!stand_in_light (enemy)
1766	&&(!QUERY_FLAG(looker,FLAG_SEE_IN_DARK)||	1914	&& (!looker->flag [FLAG_SEE_IN_DARK] || !is_true_undead (looker) || !looker->flag [FLAG_XRAYS]))
1767	!is_true_undead(looker)||!QUERY_FLAG(looker,FLAG_XRAYS)))
1768	return 0;	1915	return 0;
1769		1916
1770	return 1;	1917	return 1;
1771	}	1918	}
1772		1919
		1920	//-GPL

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