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Comparing deliantra/server/server/monster.C (file contents):
Revision 1.21 by root, Sun Jan 14 23:35:04 2007 UTC vs.
Revision 1.100 by root, Sat Nov 17 23:40:04 2018 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 3 *
4 Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team 4 * Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team
5 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 Copyright (C) 2002 Mark Wedel & Crossfire Development Team 6 * Copyright (©) 2002 Mark Wedel & Crossfire Development Team
6 Copyright (C) 1992 Frank Tore Johansen 7 * Copyright (©) 1992 Frank Tore Johansen
7 8 *
8 This program is free software; you can redistribute it and/or modify 9 * Deliantra is free software: you can redistribute it and/or modify it under
9 it under the terms of the GNU General Public License as published by 10 * the terms of the Affero GNU General Public License as published by the
10 the Free Software Foundation; either version 2 of the License, or 11 * Free Software Foundation, either version 3 of the License, or (at your
11 (at your option) any later version. 12 * option) any later version.
12 13 *
13 This program is distributed in the hope that it will be useful, 14 * This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details. 17 * GNU General Public License for more details.
17 18 *
18 You should have received a copy of the GNU General Public License 19 * You should have received a copy of the Affero GNU General Public License
19 along with this program; if not, write to the Free Software 20 * and the GNU General Public License along with this program. If not, see
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * <http://www.gnu.org/licenses/>.
21 22 *
22 The authors can be reached via e-mail at <crossfire@schmorp.de> 23 * The authors can be reached via e-mail to <support@deliantra.net>
23*/ 24 */
25
26//+GPL
24 27
25#include <global.h> 28#include <global.h>
26#include <sproto.h> 29#include <sproto.h>
27#include <spells.h> 30#include <spells.h>
28#include <skills.h> 31#include <skills.h>
… …
36 * set to sane values. 39 * set to sane values.
37 */ 40 */
38object * 41object *
39check_enemy (object *npc, rv_vector * rv) 42check_enemy (object *npc, rv_vector * rv)
40{ 43{
41
42 /* if this is pet, let him attack the same enemy as his owner 44 /* if this is pet, let him attack the same enemy as his owner
43 * TODO: when there is no ower enemy, try to find a target, 45 * TODO: when there is no ower enemy, try to find a target,
44 * which CAN attack the owner. */ 46 * which CAN attack the owner. */
45 if ((npc->attack_movement & HI4) == PETMOVE) 47 if ((npc->attack_movement & HI4) == PETMOVE)
46 { 48 {
… …
48 npc->enemy = NULL; 50 npc->enemy = NULL;
49 else if (npc->enemy == NULL) 51 else if (npc->enemy == NULL)
50 npc->enemy = npc->owner->enemy; 52 npc->enemy = npc->owner->enemy;
51 } 53 }
52 54
53 /* periodically, a monster mayu change its target. Also, if the object 55 /* periodically, a monster may change its target. Also, if the object
54 * has been destroyed, etc, clear the enemy. 56 * has been destroyed, etc, clear the enemy.
55 * TODO: this should be changed, because it invokes to attack forced or 57 * TODO: this should be changed, because it invokes to attack forced or
56 * attacked monsters to leave the attacker alone, before it is destroyed 58 * attacked monsters to leave the attacker alone, before it is destroyed
57 */ 59 */
58 /* i had removed the random target leave, this invokes problems with friendly 60 /* I had removed the random target leave, this invokes problems with friendly
59 * objects, getting attacked and defending herself - they don't try to attack 61 * objects, getting attacked and defending herself - they don't try to attack
60 * again then but perhaps get attack on and on 62 * again then but perhaps get attack on and on
61 * If we include a aggravated flag in , we can handle evil vs evil and good vs good 63 * If we include a aggravated flag in , we can handle evil vs evil and good vs good
62 * too. */ 64 * too. */
63 65
64 if (npc->enemy) 66 if (npc->enemy)
65 { 67 {
66 /* I broke these if's apart to better be able to see what 68 /* I broke these if's apart to better be able to see what
67 * the grouping checks are. Code is the same. 69 * the grouping checks are. Code is the same.
68 */ 70 */
69 if (QUERY_FLAG (npc->enemy, FLAG_REMOVED) || 71 if (npc->enemy->flag [FLAG_REMOVED] ||
70 QUERY_FLAG (npc->enemy, FLAG_FREED) || 72 npc->enemy->flag [FLAG_FREED] ||
71 !on_same_map (npc, npc->enemy) || npc == npc->enemy || QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (npc->enemy, FLAG_NEUTRAL)) 73 !on_same_map (npc, npc->enemy) || npc == npc->enemy || npc->flag [FLAG_NEUTRAL] || npc->enemy->flag [FLAG_NEUTRAL])
72 npc->enemy = NULL; 74 npc->enemy = 0;
73 75
74 else if (QUERY_FLAG (npc, FLAG_FRIENDLY) && ((QUERY_FLAG (npc->enemy, FLAG_FRIENDLY) 76 else if (npc->flag [FLAG_FRIENDLY] && ((npc->enemy->flag [FLAG_FRIENDLY]
75 && !(should_arena_attack (npc, npc->owner, npc->enemy))) 77 && !(should_arena_attack (npc, npc->owner, npc->enemy)))
76 || ((npc->enemy->type == PLAYER) && !(should_arena_attack (npc, npc->owner, npc->enemy))) 78 || ((npc->enemy->type == PLAYER) && !(should_arena_attack (npc, npc->owner, npc->enemy)))
77 || npc->enemy == npc->owner)) 79 || npc->enemy == npc->owner))
78 npc->enemy = NULL; 80 npc->enemy = 0;
79 81
80 82
81 else if (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (npc->enemy, FLAG_FRIENDLY) && npc->enemy->type != PLAYER)) 83 else if (!npc->flag [FLAG_FRIENDLY] && (!npc->enemy->flag [FLAG_FRIENDLY] && npc->enemy->type != PLAYER))
82 npc->enemy = NULL; 84 npc->enemy = 0;
83 85
84 /* I've noticed that pets could sometimes get an arrow as the 86 /* I've noticed that pets could sometimes get an arrow as the
85 * target enemy - this code below makes sure the enemy is something 87 * target enemy - this code below makes sure the enemy is something
86 * that should be attacked. My guess is that the arrow hits 88 * that should be attacked. My guess is that the arrow hits
87 * the creature/owner, and so the creature then takes that 89 * the creature/owner, and so the creature then takes that
88 * as the enemy to attack. 90 * as the enemy to attack.
89 */ 91 */
90 else if (!QUERY_FLAG (npc->enemy, FLAG_MONSTER) && 92 else if (!npc->enemy->flag [FLAG_MONSTER]
91 !QUERY_FLAG (npc->enemy, FLAG_GENERATOR) && npc->enemy->type != PLAYER && npc->enemy->type != GOLEM) 93 && !npc->enemy->flag [FLAG_GENERATOR]
94 && npc->enemy->type != PLAYER
95 && npc->enemy->type != GOLEM)
92 npc->enemy = NULL; 96 npc->enemy = 0;
93
94 } 97 }
98
95 return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : NULL; 99 return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : 0;
96} 100}
97 101
98/* Returns the nearest living creature (monster or generator). 102/* Returns the nearest living creature (monster or generator).
99 * Modified to deal with tiled maps properly. 103 * Modified to deal with tiled maps properly.
100 * Also fixed logic so that monsters in the lower directions were more 104 * Also fixed logic so that monsters in the lower directions were more
… …
102 * of direction, revisit them after looking at all the other spaces. 106 * of direction, revisit them after looking at all the other spaces.
103 * 107 *
104 * Note that being this may skip some number of spaces, it will 108 * Note that being this may skip some number of spaces, it will
105 * not necessarily find the nearest living creature - it basically 109 * not necessarily find the nearest living creature - it basically
106 * chooses one from within a 3 space radius, and since it skips 110 * chooses one from within a 3 space radius, and since it skips
107 * the first few directions, it could very well choose something 111 * the first few directions, it could very well choose something
108 * 3 spaces away even though something directly north is closer. 112 * 3 spaces away even though something directly north is closer.
109 * 113 *
110 * this function is map tile aware. 114 * this function is map tile aware.
111 */ 115 */
112object * 116object *
… …
122 for (i = 0; i < SIZEOFFREE; i++) 126 for (i = 0; i < SIZEOFFREE; i++)
123 { 127 {
124 /* modified to implement smart searching using search_arr 128 /* modified to implement smart searching using search_arr
125 * guidance array to determine direction of search order 129 * guidance array to determine direction of search order
126 */ 130 */
127 nx = npc->x + freearr_x[search_arr[i]]; 131 nx = npc->x + DIRX (search_arr[i]);
128 ny = npc->y + freearr_y[search_arr[i]]; 132 ny = npc->y + DIRY (search_arr[i]);
129 m = npc->map; 133 m = npc->map;
130 134
131 mflags = get_map_flags (m, &m, nx, ny, &nx, &ny); 135 mflags = get_map_flags (m, &m, nx, ny, &nx, &ny);
132 136
133 if (mflags & P_OUT_OF_MAP) 137 if (mflags & P_OUT_OF_MAP)
… …
143 } 147 }
144 148
145 return 0; 149 return 0;
146} 150}
147 151
148
149/* Tries to find an enmy for npc. We pass the range vector since 152/* Tries to find an enemy for npc. We pass the range vector since
150 * our caller will find the information useful. 153 * our caller will find the information useful.
151 * Currently, only move_monster calls this function. 154 * Currently, only move_monster calls this function.
152 * Fix function so that we always make calls to get_rangevector 155 * Fix function so that we always make calls to get_rangevector
153 * if we have a valid target - function as not doing so in 156 * if we have a valid target - function as not doing so in
154 * many cases. 157 * many cases.
155 */ 158 */
156 159static object *
157object *
158find_enemy (object *npc, rv_vector * rv) 160find_enemy (object *npc, rv_vector * rv)
159{ 161{
160 object *attacker, *tmp = NULL; 162 object *attacker, *tmp = NULL;
161 163
162 attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */ 164 attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */
163 npc->attacked_by = 0; /* always clear the attacker entry */ 165 npc->attacked_by = 0; /* always clear the attacker entry */
164 166
165 /* if we berserk, we don't care about others - we attack all we can find */ 167 /* if we berserk, we don't care about others - we attack all we can find */
166 if (QUERY_FLAG (npc, FLAG_BERSERK)) 168 if (npc->flag [FLAG_BERSERK])
167 { 169 {
168 tmp = find_nearest_living_creature (npc); 170 tmp = find_nearest_living_creature (npc);
169 171
170 if (tmp) 172 if (tmp)
171 get_rangevector (npc, tmp, rv, 0); 173 get_rangevector (npc, tmp, rv, 0);
174
172 return tmp; 175 return tmp;
173 } 176 }
174 177
175 /* Here is the main enemy selection. 178 /* Here is the main enemy selection.
176 * We want this: if there is an enemy, attack him until its not possible or 179 * We want this: if there is an enemy, attack him until its not possible or
177 * one of both is dead. 180 * one of both is dead.
178 * If we have no enemy and we are... 181 * If we have no enemy and we are...
179 * a monster: try to find a player, a pet or a friendly monster 182 * a monster: try to find a player, a pet or a friendly monster
180 * a friendly: only target a monster which is targeting you first or targeting a player 183 * a friendly: only target a monster which is targeting you first or targeting a player
181 * a neutral: fight a attacker (but there should be none), then do nothing 184 * a neutral: fight a attacker (but there should be none), then do nothing
… …
196 /* we check our old enemy. */ 199 /* we check our old enemy. */
197 if (!(tmp = check_enemy (npc, rv))) 200 if (!(tmp = check_enemy (npc, rv)))
198 { 201 {
199 if (attacker) /* if we have an attacker, check him */ 202 if (attacker) /* if we have an attacker, check him */
200 { 203 {
201 /* TODO: thats not finished */ 204 /* TODO: that's not finished */
202 /* we don't want a fight evil vs evil or good against non evil */ 205 /* we don't want a fight evil vs evil or good against non evil */
203 206
204 if (QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (attacker, FLAG_NEUTRAL) || /* neutral */ 207 if (npc->flag [FLAG_NEUTRAL] || attacker->flag [FLAG_NEUTRAL] || /* neutral */
205 (QUERY_FLAG (npc, FLAG_FRIENDLY) && QUERY_FLAG (attacker, FLAG_FRIENDLY)) || 208 (npc->flag [FLAG_FRIENDLY] && attacker->flag [FLAG_FRIENDLY]) ||
206 (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (attacker, FLAG_FRIENDLY) && attacker->type != PLAYER))) 209 (!npc->flag [FLAG_FRIENDLY] && (!attacker->flag [FLAG_FRIENDLY] && attacker->type != PLAYER)))
207 CLEAR_FLAG (npc, FLAG_SLEEP); /* skip it, but lets wakeup */ 210 npc->clr_flag (FLAG_SLEEP); /* skip it, but lets wakeup */
208 else if (on_same_map (npc, attacker)) /* thats the only thing we must know... */ 211 else if (on_same_map (npc, attacker)) /* that's the only thing we must know... */
209 { 212 {
210 CLEAR_FLAG (npc, FLAG_SLEEP); /* well, NOW we really should wake up! */ 213 npc->clr_flag (FLAG_SLEEP); /* well, NOW we really should wake up! */
211 npc->enemy = attacker; 214 npc->enemy = attacker;
212 return attacker; /* yes, we face our attacker! */ 215 return attacker; /* yes, we face our attacker! */
213 } 216 }
214 } 217 }
215 218
216 /* we have no legal enemy or attacker, so we try to target a new one */ 219 /* we have no legal enemy or attacker, so we try to target a new one */
217 if (!QUERY_FLAG (npc, FLAG_UNAGGRESSIVE) && !QUERY_FLAG (npc, FLAG_FRIENDLY) && !QUERY_FLAG (npc, FLAG_NEUTRAL)) 220 if (!npc->flag [FLAG_UNAGGRESSIVE] && !npc->flag [FLAG_FRIENDLY] && !npc->flag [FLAG_NEUTRAL])
218 { 221 {
219 npc->enemy = get_nearest_player (npc); 222 npc->enemy = get_nearest_player (npc);
220 if (npc->enemy) 223 if (npc->enemy)
221 tmp = check_enemy (npc, rv); 224 tmp = check_enemy (npc, rv);
222 } 225 }
… …
229/* Sees if this monster should wake up. 232/* Sees if this monster should wake up.
230 * Currently, this is only called from move_monster, and 233 * Currently, this is only called from move_monster, and
231 * if enemy is set, then so should be rv. 234 * if enemy is set, then so should be rv.
232 * returns 1 if the monster should wake up, 0 otherwise. 235 * returns 1 if the monster should wake up, 0 otherwise.
233 */ 236 */
234 237static int
235int
236check_wakeup (object *op, object *enemy, rv_vector * rv) 238check_wakeup (object *op, object *enemy, rv_vector *rv)
237{ 239{
238 int radius = op->stats.Wis > MIN_MON_RADIUS ? op->stats.Wis : MIN_MON_RADIUS;
239
240 /* Trim work - if no enemy, no need to do anything below */ 240 /* Trim work - if no enemy, no need to do anything below */
241 if (!enemy) 241 if (!enemy)
242 return 0; 242 return 0;
243 243
244 if (!op->flag [FLAG_SLEEP])
245 return 1;
246
247 int radius = max (op->stats.Wis, MIN_MON_RADIUS);
248
249 if (op->flag [FLAG_BLIND])
244 /* blinded monsters can only find nearby objects to attack */ 250 /* blinded monsters can only find nearby objects to attack */
245 if (QUERY_FLAG (op, FLAG_BLIND))
246 radius = MIN_MON_RADIUS; 251 radius = MIN_MON_RADIUS;
247 252 else if (op->map
253 && !enemy->invisible
254 && !stand_in_light (enemy)
255 && (!op->flag[FLAG_SEE_IN_DARK] || !op->flag [FLAG_SEE_INVISIBLE]))
248 /* This covers the situation where the monster is in the dark 256 /* This covers the situation where the monster is in the dark
249 * and has an enemy. If the enemy has no carried light (or isnt 257 * and has an enemy. If the enemy has no carried light (or isnt
250 * glowing!) then the monster has trouble finding the enemy. 258 * glowing!) then the monster has trouble finding the enemy.
251 * Remember we already checked to see if the monster can see in 259 * Remember we already checked to see if the monster can see in
252 * the dark. */ 260 * the dark. */
261 min_it (radius, MIN_MON_RADIUS + MAX_DARKNESS - op->map->darklevel ());
253 262
254 else if (op->map && op->map->darkness > 0 && enemy && !enemy->invisible && 263 if (enemy->flag [FLAG_STEALTH])
255 !stand_in_light (enemy) && (!QUERY_FLAG (op, FLAG_SEE_IN_DARK) || !QUERY_FLAG (op, FLAG_SEE_INVISIBLE))) 264 radius = radius / 2 + 1;
256 {
257 int dark = radius / (op->map->darkness);
258
259 radius = (dark > MIN_MON_RADIUS) ? (dark + 1) : MIN_MON_RADIUS;
260 }
261 else if (!QUERY_FLAG (op, FLAG_SLEEP))
262 return 1;
263 265
264 /* enemy should already be on this map, so don't really need to check 266 /* enemy should already be on this map, so don't really need to check
265 * for that. 267 * for that.
266 */ 268 */
267 if (rv->distance < (unsigned int) (QUERY_FLAG (enemy, FLAG_STEALTH) ? (radius / 2) + 1 : radius)) 269 if (rv->distance <= radius)
268 { 270 {
269 CLEAR_FLAG (op, FLAG_SLEEP); 271 op->clr_flag (FLAG_SLEEP);
270 return 1; 272 return 1;
271 } 273 }
274
272 return 0; 275 return 0;
273} 276}
274 277
275int 278static int
276move_randomly (object *op) 279move_randomly (object *op)
277{ 280{
281 /* Give up to 15 chances for a monster to move randomly */
282 for (int i = 0; i < 15; i++)
283 if (op->move (rndm (8) + 1))
284 return 1;
285
286 return 0;
287}
288
289/*
290 * monster_can_pick(): If the monster is interested in picking up
291 * the item, then return 0. Otherwise 0.
292 * Instead of pick_up, flags for "greed", etc, should be used.
293 * I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
294 */
295static int
296monster_can_pick (object *monster, object *item)
297{
298 int flag = 0;
278 int i; 299 int i;
279 300
280 /* Give up to 15 chances for a monster to move randomly */ 301 if (!can_pick (monster, item))
281 for (i = 0; i < 15; i++) 302 return 0;
303
304 if (item->flag [FLAG_UNPAID])
305 return 0;
306
307 if (monster->pick_up & 64) /* All */
308 flag = 1;
309
310 else
311 switch (item->type)
282 { 312 {
283 if (move_object (op, RANDOM () % 8 + 1)) 313 case MONEY:
314 case GEM:
315 flag = monster->pick_up & 2;
316 break;
317
318 case FOOD:
319 flag = monster->pick_up & 4;
320 break;
321
322 case WEAPON:
323 flag = (monster->pick_up & 8) || monster->flag [FLAG_USE_WEAPON];
324 break;
325
326 case ARMOUR:
327 case SHIELD:
328 case HELMET:
329 case BOOTS:
330 case GLOVES:
331 case GIRDLE:
332 flag = (monster->pick_up & 16) || monster->flag [FLAG_USE_ARMOUR];
333 break;
334
335 case SKILL:
336 flag = monster->flag [FLAG_CAN_USE_SKILL];
337 break;
338
339 case RING:
340 flag = monster->flag [FLAG_USE_RING];
341 break;
342
343 case RANGED:
344 case WAND:
345 case HORN:
346 case ROD:
347 flag = monster->flag [FLAG_USE_RANGE];
348 break;
349
350 case SPELLBOOK:
351 flag = monster->arch && monster->arch->flag [FLAG_CAST_SPELL];
352 break;
353
354 case SCROLL:
355 flag = monster->flag [FLAG_USE_SCROLL];
356 break;
357
358 case BOW:
359 case ARROW:
360 flag = monster->flag [FLAG_USE_BOW];
361 break;
362 }
363
364 /* Simplistic check - if the monster has a location to equip it, he will
365 * pick it up. Note that this doesn't handle cases where an item may
366 * use several locations.
367 */
368 for (i = 0; i < NUM_BODY_LOCATIONS; i++)
369 {
370 if (monster->slot[i].info && item->slot[i].info)
371 {
372 flag = 1;
373 break;
374 }
375 }
376
377 if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && !flag))
284 return 1; 378 return 1;
285 } 379
286 return 0; 380 return 0;
287} 381}
288 382
289/* 383/*
290 * Move-monster returns 1 if the object has been freed, otherwise 0. 384 * monster_check_pickup(): checks for items that monster can pick up.
385 *
386 * Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
387 * Each time the blob passes over some treasure, it will
388 * grab it a.s.a.p.
389 *
390 * Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
391 * to handle this.
392 *
393 * This function was seen be continueing looping at one point (tmp->below
394 * became a recursive loop. It may be better to call monster_check_apply
395 * after we pick everything up, since that function may call others which
396 * affect stacking on this space.
291 */ 397 */
292 398static void
293int 399monster_check_pickup (object *monster)
294move_monster (object *op)
295{ 400{
296 int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */ 401 for (object *next, *tmp = monster->below; tmp; tmp = next)
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)
304 return 0;
305
306 /* for target facing, we copy this value here for fast access */
307 if (oph->head) /* force update the head - one arch one pic */
308 oph = oph->head;
309
310 if (QUERY_FLAG (op, FLAG_NO_ATTACK)) /* we never ever attack */
311 enemy = op->enemy = NULL;
312 else if ((enemy = find_enemy (op, &rv)))
313 /* we have an enemy, just tell him we want him dead */
314 enemy->attacked_by = op; /* our ptr */
315
316 /* generate hp, if applicable */
317 if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
318 { 402 {
403 next = tmp->below;
319 404
320 /* last heal is in funny units. Dividing by speed puts 405 if (monster_can_pick (monster, tmp))
321 * the regeneration rate on a basis of time instead of
322 * #moves the monster makes. The scaling by 8 is
323 * to capture 8th's of a hp fraction regens
324 * 406 {
325 * Cast to sint32 before comparing to maxhp since otherwise an (sint16) 407 tmp->remove ();
326 * overflow might produce monsters with negative hp. 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.
327 */ 414 */
328 415 if (next && next->destroyed ())
329 op->last_heal += (int) ((float) (8 * op->stats.Con) / FABS (op->speed));
330 op->stats.hp = MIN ((sint32) op->stats.hp + op->last_heal / 32, op->stats.maxhp); /* causes Con/4 hp/tick */
331 op->last_heal %= 32;
332
333 /* So if the monster has gained enough HP that they are no longer afraid */
334 if (QUERY_FLAG (op, FLAG_RUN_AWAY) && op->stats.hp >= (signed short) (((float) op->run_away / (float) 100) * (float) op->stats.maxhp))
335 CLEAR_FLAG (op, FLAG_RUN_AWAY);
336
337 if (op->stats.hp > op->stats.maxhp)
338 op->stats.hp = op->stats.maxhp;
339 }
340
341 /* generate sp, if applicable */
342 if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
343 {
344
345 /* last_sp is in funny units. Dividing by speed puts
346 * the regeneration rate on a basis of time instead of
347 * #moves the monster makes. The scaling by 8 is
348 * to capture 8th's of a sp fraction regens
349 *
350 * Cast to sint32 before comparing to maxhp since otherwise an (sint16)
351 * overflow might produce monsters with negative sp.
352 */
353
354 op->last_sp += (int) ((float) (8 * op->stats.Pow) / FABS (op->speed));
355 op->stats.sp = MIN (op->stats.sp + op->last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
356 op->last_sp %= 128;
357 }
358
359 /* this should probably get modified by many more values.
360 * (eg, creatures resistance to fear, level, etc. )
361 */
362 if (QUERY_FLAG (op, FLAG_SCARED) && !(RANDOM () % 20))
363 {
364 CLEAR_FLAG (op, FLAG_SCARED); /* Time to regain some "guts"... */
365 }
366
367 if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
368 return QUERY_FLAG (op, FLAG_FREED);
369
370 if (QUERY_FLAG (op, FLAG_SLEEP) || QUERY_FLAG (op, FLAG_BLIND) ||
371 ((op->map->darkness > 0) && !QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
372 {
373 if (!check_wakeup (op, enemy, &rv))
374 return 0; 416 return;
375 }
376
377 /* check if monster pops out of hidden spot */
378 if (op->hide)
379 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 { 417 }
390 if (QUERY_FLAG (op, FLAG_ONLY_ATTACK)) 418}
391 { 419
392 op->destroy (); 420/*
393 return 1; 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 */
426static void
427monster_apply_below (object *monster)
428{
429 object *tmp, *next;
430
431 for (tmp = monster->below; tmp != NULL; tmp = next)
432 {
433 next = tmp->below;
434 switch (tmp->type)
394 } 435 {
395 436 case T_HANDLE:
396 /* Probably really a bug for a creature to have both
397 * stand still and a movement type set.
398 */
399 if (!QUERY_FLAG (op, FLAG_STAND_STILL))
400 {
401 if (op->attack_movement & HI4)
402 {
403 switch (op->attack_movement & HI4)
404 {
405 case (PETMOVE):
406 pet_move (op);
407 break;
408
409 case (CIRCLE1):
410 circ1_move (op);
411 break;
412
413 case (CIRCLE2):
414 circ2_move (op);
415 break;
416
417 case (PACEV):
418 pace_movev (op);
419 break;
420
421 case (PACEH):
422 pace_moveh (op);
423 break;
424
425 case (PACEV2):
426 pace2_movev (op);
427 break;
428
429 case (PACEH2):
430 pace2_moveh (op);
431 break;
432
433 case (RANDO):
434 rand_move (op);
435 break;
436
437 case (RANDO2):
438 move_randomly (op);
439 break;
440 }
441 return 0;
442 }
443 else if (QUERY_FLAG (op, FLAG_RANDOM_MOVE))
444 (void) move_randomly (op);
445
446 } /* stand still */
447 return 0;
448 } /* no enemy */
449
450 /* We have an enemy. Block immediately below is for pets */
451 if ((op->attack_movement & HI4) == PETMOVE && (owner = op->owner) != NULL && !on_same_map (op, owner))
452 return follow_owner (op, owner);
453
454 /* doppleganger code to change monster facing to that of the nearest
455 * player. Hmm. The code is here, but no monster in the current
456 * arch set uses it.
457 */
458 if ((op->race != NULL) && strcmp (op->race, "doppleganger") == 0)
459 {
460 op->face = enemy->face;
461 op->name = enemy->name;
462 }
463
464 /* Calculate range information for closest body part - this
465 * is used for the 'skill' code, which isn't that smart when
466 * it comes to figuring it out - otherwise, giants throw boulders
467 * into themselves.
468 */
469 get_rangevector (op, enemy, &rv, 0);
470
471 /* Move the check for scared up here - if the monster was scared,
472 * we were not doing any of the logic below, so might as well save
473 * a few cpu cycles.
474 */
475 if (!QUERY_FLAG (op, FLAG_SCARED))
476 {
477 rv_vector rv1;
478
479 /* now we test every part of an object .... this is a real ugly piece of code */
480 for (part = op; part != NULL; part = part->more)
481 {
482 get_rangevector (part, enemy, &rv1, 0x1);
483 dir = rv1.direction;
484
485 /* hm, not sure about this part - in original was a scared flag here too
486 * but that we test above... so can be old code here
487 */
488 if (QUERY_FLAG (op, FLAG_RUN_AWAY))
489 dir = absdir (dir + 4);
490 if (QUERY_FLAG (op, FLAG_CONFUSED))
491 dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
492
493 if (QUERY_FLAG (op, FLAG_CAST_SPELL) && !(RANDOM () % 3))
494 {
495 if (monster_cast_spell (op, part, enemy, dir, &rv1))
496 return 0;
497 }
498
499 if (QUERY_FLAG (op, FLAG_READY_SCROLL) && !(RANDOM () % 3))
500 {
501 if (monster_use_scroll (op, part, enemy, dir, &rv1))
502 return 0;
503 }
504
505 if (QUERY_FLAG (op, FLAG_READY_RANGE) && !(RANDOM () % 3))
506 {
507 if (monster_use_range (op, part, enemy, dir))
508 return 0;
509 }
510 if (QUERY_FLAG (op, FLAG_READY_SKILL) && !(RANDOM () % 3))
511 {
512 if (monster_use_skill (op, rv.part, enemy, rv.direction))
513 return 0;
514 }
515 if (QUERY_FLAG (op, FLAG_READY_BOW) && !(RANDOM () % 2))
516 {
517 if (monster_use_bow (op, part, enemy, dir))
518 return 0;
519 }
520 } /* for processing of all parts */
521 } /* If not scared */
522
523
524 part = rv.part;
525 dir = rv.direction;
526
527 if (QUERY_FLAG (op, FLAG_SCARED) || QUERY_FLAG (op, FLAG_RUN_AWAY))
528 dir = absdir (dir + 4);
529
530 if (QUERY_FLAG (op, FLAG_CONFUSED))
531 dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
532
533 pre_att_dir = dir; /* remember the original direction */
534
535 if ((op->attack_movement & LO4) && !QUERY_FLAG (op, FLAG_SCARED))
536 {
537 switch (op->attack_movement & LO4)
538 {
539 case DISTATT: 437 case TRIGGER:
540 dir = dist_att (dir, op, enemy, part, &rv); 438 if (monster->will_apply & 1)
439 monster->apply (tmp);
541 break; 440 break;
542 441
543 case RUNATT: 442 case TREASURE:
544 dir = run_att (dir, op, enemy, part, &rv); 443 if (monster->will_apply & 2)
444 monster->apply (tmp);
545 break; 445 break;
546 446
547 case HITRUN:
548 dir = hitrun_att (dir, op, enemy);
549 break;
550
551 case WAITATT:
552 dir = wait_att (dir, op, enemy, part, &rv);
553 break;
554
555 case RUSH: /* default - monster normally moves towards player */
556 case ALLRUN:
557 break;
558
559 case DISTHIT:
560 dir = disthit_att (dir, op, enemy, part, &rv);
561 break;
562
563 case WAIT2:
564 dir = wait_att2 (dir, op, enemy, part, &rv);
565 break;
566
567 default:
568 LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
569 }
570 }
571
572 if (!dir)
573 return 0;
574
575 if (!QUERY_FLAG (op, FLAG_STAND_STILL))
576 {
577 if (move_object (op, dir)) /* Can the monster move directly toward player? */
578 { 447 }
579 /* elmex: Turn our monster after it moved if it has DISTATT attack */ 448 if (tmp->flag [FLAG_IS_FLOOR])
580 if ((op->attack_movement & LO4) == DISTATT) 449 break;
581 op->direction = pre_att_dir;
582
583 return 0;
584 }
585
586 if (QUERY_FLAG (op, FLAG_SCARED) || !can_hit (part, enemy, &rv) || QUERY_FLAG (op, FLAG_RUN_AWAY))
587 {
588
589 /* Try move around corners if !close */
590 int maxdiff = (QUERY_FLAG (op, FLAG_ONLY_ATTACK) || RANDOM () & 1) ? 1 : 2;
591
592 for (diff = 1; diff <= maxdiff; diff++)
593 {
594 /* try different detours */
595 int m = 1 - (RANDOM () & 2); /* Try left or right first? */
596
597 if (move_object (op, absdir (dir + diff * m)) || move_object (op, absdir (dir - diff * m)))
598 return 0;
599 }
600 }
601 } /* if monster is not standing still */
602
603 /* elmex: Turn our monster after it moved if it has DISTATT attack */
604 if ((op->attack_movement & LO4) == DISTATT)
605 op->direction = pre_att_dir;
606
607 /*
608 * Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
609 * direction if they can't move away.
610 */
611 if (!QUERY_FLAG (op, FLAG_ONLY_ATTACK) && (QUERY_FLAG (op, FLAG_RUN_AWAY) || QUERY_FLAG (op, FLAG_SCARED)))
612 if (move_randomly (op))
613 return 0;
614
615 /*
616 * Try giving the monster a new enemy - the player that is closest
617 * to it. In this way, it won't just keep trying to get to a target
618 * that is inaccessible.
619 * This could be more clever - it should go through a list of several
620 * enemies, as it is now, you could perhaps get situations where there
621 * are two players flanking the monster at close distance, but which
622 * the monster can't get to, and a third one at a far distance that
623 * the monster could get to - as it is, the monster won't look at that
624 * third one.
625 */
626 if (!QUERY_FLAG (op, FLAG_FRIENDLY) && enemy == op->enemy)
627 { 450 }
628 object *nearest_player = get_nearest_player (op);
629
630 if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
631 {
632 op->enemy = NULL;
633 enemy = nearest_player;
634 }
635 }
636
637 if (!QUERY_FLAG (op, FLAG_SCARED) && can_hit (part, enemy, &rv))
638 {
639 /* The adjustement to wc that was here before looked totally bogus -
640 * since wc can in fact get negative, that would mean by adding
641 * the current wc, the creature gets better? Instead, just
642 * add a fixed amount - nasty creatures that are runny away should
643 * still be pretty nasty.
644 */
645 if (QUERY_FLAG (op, FLAG_RUN_AWAY))
646 {
647 part->stats.wc += 10;
648 (void) skill_attack (enemy, part, 0, NULL, NULL);
649 part->stats.wc -= 10;
650 }
651 else
652 (void) skill_attack (enemy, part, 0, NULL, NULL);
653 } /* if monster is in attack range */
654
655 if (QUERY_FLAG (part, FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
656 return 1;
657
658 if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
659 {
660 op->remove ();
661 op->destroy ();
662 return 1;
663 }
664 return 0;
665}
666
667int
668can_hit (object *ob1, object *ob2, rv_vector * rv)
669{
670 object *more;
671 rv_vector rv1;
672
673 if (QUERY_FLAG (ob1, FLAG_CONFUSED) && !(RANDOM () % 3))
674 return 0;
675
676 if (abs (rv->distance_x) < 2 && abs (rv->distance_y) < 2)
677 return 1;
678
679 /* check all the parts of ob2 - just because we can't get to
680 * its head doesn't mean we don't want to pound its feet
681 */
682 for (more = ob2->more; more != NULL; more = more->more)
683 {
684 get_rangevector (ob1, more, &rv1, 0);
685 if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
686 return 1;
687 }
688 return 0;
689
690} 451}
691 452
692/* Returns 1 is monster should cast spell sp at an enemy 453/* Returns 1 is monster should cast spell sp at an enemy
693 * Returns 0 if the monster should not cast this spell. 454 * Returns 0 if the monster should not cast this spell.
694 * 455 *
… …
702 * 463 *
703 * 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,
704 * 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,
705 * the right type of healing spell could be useful. 466 * the right type of healing spell could be useful.
706 */ 467 */
707
708static int 468static int
709monster_should_cast_spell (object *monster, object *spell_ob) 469monster_should_cast_spell (object *monster, object *spell_ob)
710{ 470{
711 if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET || 471 if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||
712 spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE || 472 spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||
713 spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE || 473 spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||
714 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 ||
715 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 ||
716 spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE) 476 spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE)
717
718 return 1; 477 return 1;
719 478
720 return 0; 479 return 0;
721} 480}
722 481
723
724#define MAX_KNOWN_SPELLS 20
725
726/* Returns a randomly selected spell. This logic is still
727 * less than ideal. This code also only seems to deal with
728 * wizard spells, as the check is against sp, and not grace.
729 * can mosnters know cleric spells?
730 */
731object *
732monster_choose_random_spell (object *monster)
733{
734 object *altern[MAX_KNOWN_SPELLS];
735 object *tmp;
736 int i = 0;
737
738 for (tmp = monster->inv; tmp != NULL; tmp = tmp->below)
739 if (tmp->type == SPELLBOOK || tmp->type == SPELL)
740 {
741 /* Check and see if it's actually a useful spell.
742 * If its a spellbook, the spell is actually the inventory item.
743 * if it is a spell, then it is just the object itself.
744 */
745 if (monster_should_cast_spell (monster, (tmp->type == SPELLBOOK) ? tmp->inv : tmp))
746 {
747 altern[i++] = tmp;
748 if (i == MAX_KNOWN_SPELLS)
749 break;
750 }
751 }
752 if (!i)
753 return NULL;
754 return altern[RANDOM () % i];
755}
756
757/* This checks to see if the monster should cast a spell/ability.
758 * it returns true if the monster casts a spell, 0 if he doesn't.
759 * head is the head of the monster.
760 * part is the part of the monster we are checking against.
761 * pl is the target.
762 * dir is the direction to case.
763 * rv is the vector which describes where the enemy is.
764 */
765
766int
767monster_cast_spell (object *head, object *part, object *pl, int dir, rv_vector * rv)
768{
769 object *spell_item;
770 object *owner;
771 rv_vector rv1;
772
773 /* If you want monsters to cast spells over friends, this spell should
774 * be removed. It probably should be in most cases, since monsters still
775 * don't care about residual effects (ie, casting a cone which may have a
776 * clear path to the player, the side aspects of the code will still hit
777 * other monsters)
778 */
779 if (!(dir = path_to_player (part, pl, 0)))
780 return 0;
781
782 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
783 {
784 get_rangevector (head, owner, &rv1, 0x1);
785 if (dirdiff (dir, rv1.direction) < 2)
786 {
787 return 0; /* Might hit owner with spell */
788 }
789 }
790
791 if (QUERY_FLAG (head, FLAG_CONFUSED))
792 dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
793
794 /* If the monster hasn't already chosen a spell, choose one
795 * I'm not sure if it really make sense to pre-select spells (events
796 * could be different by the time the monster goes again).
797 */
798 if (head->spellitem == NULL)
799 {
800 if ((spell_item = monster_choose_random_spell (head)) == NULL)
801 {
802 LOG (llevMonster, "Turned off spells in %s\n", &head->name);
803 CLEAR_FLAG (head, FLAG_CAST_SPELL); /* Will be turned on when picking up book */
804 return 0;
805 }
806 if (spell_item->type == SPELLBOOK)
807 {
808 if (!spell_item->inv)
809 {
810 LOG (llevError, "spellbook %s does not contain a spell?\n", &spell_item->name);
811 return 0;
812 }
813 spell_item = spell_item->inv;
814 }
815 }
816 else
817 spell_item = head->spellitem;
818
819 if (!spell_item)
820 return 0;
821
822 /* Best guess this is a defensive/healing spell */
823 if (spell_item->range <= 1 || spell_item->stats.dam < 0)
824 dir = 0;
825
826 /* Monster doesn't have enough spell-points */
827 if (head->stats.sp < SP_level_spellpoint_cost (head, spell_item, SPELL_MANA))
828 return 0;
829
830 if (head->stats.grace < SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE))
831 return 0;
832
833 head->stats.sp -= SP_level_spellpoint_cost (head, spell_item, SPELL_MANA);
834 head->stats.grace -= SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE);
835
836 /* set this to null, so next time monster will choose something different */
837 head->spellitem = NULL;
838
839 return cast_spell (part, part, dir, spell_item, NULL);
840}
841
842
843int
844monster_use_scroll (object *head, object *part, object *pl, int dir, rv_vector * rv)
845{
846 object *scroll;
847 object *owner;
848 rv_vector rv1;
849
850 /* If you want monsters to cast spells over friends, this spell should
851 * be removed. It probably should be in most cases, since monsters still
852 * don't care about residual effects (ie, casting a cone which may have a
853 * clear path to the player, the side aspects of the code will still hit
854 * other monsters)
855 */
856 if (!(dir = path_to_player (part, pl, 0)))
857 return 0;
858
859 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
860 {
861 get_rangevector (head, owner, &rv1, 0x1);
862 if (dirdiff (dir, rv1.direction) < 2)
863 {
864 return 0; /* Might hit owner with spell */
865 }
866 }
867
868 if (QUERY_FLAG (head, FLAG_CONFUSED))
869 dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
870
871 for (scroll = head->inv; scroll; scroll = scroll->below)
872 if (scroll->type == SCROLL && monster_should_cast_spell (head, scroll->inv))
873 break;
874
875 /* Used up all his scrolls, so nothing do to */
876 if (!scroll)
877 {
878 CLEAR_FLAG (head, FLAG_READY_SCROLL);
879 return 0;
880 }
881
882 /* Spell should be cast on caster (ie, heal, strength) */
883 if (scroll->inv->range == 0)
884 dir = 0;
885
886 apply_scroll (part, scroll, dir);
887 return 1;
888}
889
890/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.
891 * Note that monsters do not need the skills SK_MELEE_WEAPON and
892 * SK_MISSILE_WEAPON to make those respective attacks, if we
893 * required that we would drastically increase the memory
894 * requirements of CF!!
895 *
896 * The skills we are treating here are all but those. -b.t.
897 *
898 * At the moment this is only useful for throwing, perhaps for
899 * stealing. TODO: This should be more integrated in the game. -MT, 25.11.01
900 */
901
902int
903monster_use_skill (object *head, object *part, object *pl, int dir)
904{
905 object *skill, *owner;
906
907 if (!(dir = path_to_player (part, pl, 0)))
908 return 0;
909
910 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
911 {
912 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
913
914 if (dirdiff (dir, dir2) < 1)
915 return 0; /* Might hit owner with skill -thrown rocks for example ? */
916 }
917 if (QUERY_FLAG (head, FLAG_CONFUSED))
918 dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
919
920 /* skill selection - monster will use the next unused skill.
921 * well...the following scenario will allow the monster to
922 * toggle between 2 skills. One day it would be nice to make
923 * more skills available to monsters.
924 */
925
926 for (skill = head->inv; skill != NULL; skill = skill->below)
927 if (skill->type == SKILL && skill != head->chosen_skill)
928 {
929 head->chosen_skill = skill;
930 break;
931 }
932
933 if (!skill && !head->chosen_skill)
934 {
935 LOG (llevDebug, "Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n", &head->name, head->count);
936 CLEAR_FLAG (head, FLAG_READY_SKILL);
937 return 0;
938 }
939 /* use skill */
940 return do_skill (head, part, head->chosen_skill, dir, NULL);
941}
942
943/* Monster will use a ranged spell attack. */
944
945int
946monster_use_range (object *head, object *part, object *pl, int dir)
947{
948 object *wand, *owner;
949 int at_least_one = 0;
950
951 if (!(dir = path_to_player (part, pl, 0)))
952 return 0;
953
954 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
955 {
956 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
957
958 if (dirdiff (dir, dir2) < 2)
959 return 0; /* Might hit owner with spell */
960 }
961 if (QUERY_FLAG (head, FLAG_CONFUSED))
962 dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
963
964 for (wand = head->inv; wand != NULL; wand = wand->below)
965 {
966 if (wand->type == WAND)
967 {
968 /* Found a wand, let's see if it has charges left */
969 at_least_one = 1;
970 if (wand->stats.food <= 0)
971 continue;
972
973 cast_spell (head, wand, dir, wand->inv, NULL);
974
975 if (!(--wand->stats.food))
976 {
977 if (wand->arch)
978 {
979 CLEAR_FLAG (wand, FLAG_ANIMATE);
980 wand->face = wand->arch->clone.face;
981 wand->set_speed (0);
982 }
983 }
984 /* Success */
985 return 1;
986 }
987 else if (wand->type == ROD || wand->type == HORN)
988 {
989 /* Found rod/horn, let's use it if possible */
990 at_least_one = 1;
991 if (wand->stats.hp < MAX (wand->inv->stats.sp, wand->inv->stats.grace))
992 continue;
993
994 /* drain charge before casting spell - can be a case where the
995 * spell destroys the monster, and rod, so if done after, results
996 * in crash.
997 */
998 drain_rod_charge (wand);
999 cast_spell (head, wand, dir, wand->inv, NULL);
1000
1001 /* Success */
1002 return 1;
1003 }
1004 }
1005
1006 if (at_least_one)
1007 return 0;
1008
1009 LOG (llevError, "Error: Monster %s (%d) HAS_READY_RANG() without wand/horn/rod.\n", &head->name, head->count);
1010 CLEAR_FLAG (head, FLAG_READY_RANGE);
1011 return 0;
1012}
1013
1014int
1015monster_use_bow (object *head, object *part, object *pl, int dir)
1016{
1017 object *owner;
1018
1019 if (!(dir = path_to_player (part, pl, 0)))
1020 return 0;
1021 if (QUERY_FLAG (head, FLAG_CONFUSED))
1022 dir = absdir (dir + RANDOM () % 3 + RANDOM () % 3 - 2);
1023
1024 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
1025 {
1026 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
1027
1028 if (dirdiff (dir, dir2) < 1)
1029 return 0; /* Might hit owner with arrow */
1030 }
1031
1032 /* in server/player.c */
1033 return fire_bow (head, part, NULL, dir, 0, part->x, part->y);
1034
1035}
1036
1037/* Checks if putting on 'item' will make 'who' do more 482/* Checks if putting on 'item' will make 'who' do more
1038 * damage. This is a very simplistic check - also checking things 483 * damage. This is a very simplistic check - also checking things
1039 * like speed and ac are also relevant. 484 * like speed and ac are also relevant.
1040 * 485 *
1041 * return true if item is a better object. 486 * return true if item is a better object.
1042 */ 487 */
1043 488static int
1044int
1045check_good_weapon (object *who, object *item) 489check_good_weapon (object *who, object *item)
1046{ 490{
1047 object *other_weap; 491 object *other_weap;
1048 int val = 0, i; 492 int val = 0, i;
1049 493
1050 for (other_weap = who->inv; other_weap != NULL; other_weap = other_weap->below) 494 for (other_weap = who->inv; other_weap; other_weap = other_weap->below)
1051 if (other_weap->type == item->type && QUERY_FLAG (other_weap, FLAG_APPLIED)) 495 if (other_weap->type == item->type && other_weap->flag [FLAG_APPLIED])
1052 break; 496 break;
1053 497
1054 if (other_weap == NULL) /* No other weapons */ 498 if (!other_weap) /* No other weapons */
1055 return 1; 499 return 1;
1056 500
1057 /* Rather than go through and apply the new one, and see if it is 501 /* Rather than go through and apply the new one, and see if it is
1058 * better, just do some simple checks 502 * better, just do some simple checks
1059 * Put some multipliers for things that hvae several effects, 503 * Put some multipliers for things that hvae several effects,
… …
1064 val += (item->magic - other_weap->magic) * 3; 508 val += (item->magic - other_weap->magic) * 3;
1065 /* Monsters don't really get benefits from things like regen rates 509 /* Monsters don't really get benefits from things like regen rates
1066 * from items. But the bonus for their stats are very important. 510 * from items. But the bonus for their stats are very important.
1067 */ 511 */
1068 for (i = 0; i < NUM_STATS; i++) 512 for (i = 0; i < NUM_STATS; i++)
1069 val += (get_attr_value (&item->stats, i) - get_attr_value (&other_weap->stats, i)) * 2; 513 val += item->stats.stat (i) - other_weap->stats.stat (i) * 2;
1070 514
1071 if (val > 0) 515 if (val > 0)
1072 return 1; 516 return 1;
1073 else 517 else
1074 return 0; 518 return 0;
1075
1076} 519}
1077 520
1078int 521static int
1079check_good_armour (object *who, object *item) 522check_good_armour (object *who, object *item)
1080{ 523{
1081 object *other_armour; 524 object *other_armour;
1082 int val = 0, i; 525 int val = 0, i;
1083 526
1084 for (other_armour = who->inv; other_armour != NULL; other_armour = other_armour->below) 527 for (other_armour = who->inv; other_armour; other_armour = other_armour->below)
1085 if (other_armour->type == item->type && QUERY_FLAG (other_armour, FLAG_APPLIED)) 528 if (other_armour->type == item->type && other_armour->flag [FLAG_APPLIED])
1086 break; 529 break;
1087 530
1088 if (other_armour == NULL) /* No other armour, use the new */ 531 if (other_armour == NULL) /* No other armour, use the new */
1089 return 1; 532 return 1;
1090 533
… …
1093 val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL]) / 5; 536 val = (item->resist[ATNR_PHYSICAL] - other_armour->resist[ATNR_PHYSICAL]) / 5;
1094 val += (item->magic - other_armour->magic) * 3; 537 val += (item->magic - other_armour->magic) * 3;
1095 538
1096 /* for the other protections, do weigh them very much in the equation - 539 /* for the other protections, do weigh them very much in the equation -
1097 * it is the armor protection which is most important, because there is 540 * it is the armor protection which is most important, because there is
1098 * no good way to know what the player may attack the monster with. 541 * no good way to know what the player may attack the monster with.
1099 * So if the new item has better protection than the old, give that higher 542 * So if the new item has better protection than the old, give that higher
1100 * value. If the reverse, then decrease the value of this item some. 543 * value. If the reverse, then decrease the value of this item some.
1101 */ 544 */
1102 for (i = 1; i < NROFATTACKS; i++) 545 for (i = 1; i < NROFATTACKS; i++)
1103 { 546 {
… …
1111 554
1112 if (val > 0) 555 if (val > 0)
1113 return 1; 556 return 1;
1114 else 557 else
1115 return 0; 558 return 0;
1116
1117}
1118
1119/*
1120 * monster_check_pickup(): checks for items that monster can pick up.
1121 *
1122 * Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
1123 * Each time the blob passes over some treasure, it will
1124 * grab it a.s.a.p.
1125 *
1126 * Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
1127 * to handle this.
1128 *
1129 * This function was seen be continueing looping at one point (tmp->below
1130 * became a recursive loop. It may be better to call monster_check_apply
1131 * after we pick everything up, since that function may call others which
1132 * affect stacking on this space.
1133 */
1134
1135void
1136monster_check_pickup (object *monster)
1137{
1138 object *tmp, *next;
1139
1140 for (tmp = monster->below; tmp != NULL; tmp = next)
1141 {
1142 next = tmp->below;
1143 if (monster_can_pick (monster, tmp))
1144 {
1145 tmp->remove ();
1146 tmp = insert_ob_in_ob (tmp, monster);
1147 (void) monster_check_apply (monster, tmp);
1148 }
1149 /* We could try to re-establish the cycling, of the space, but probably
1150 * not a big deal to just bail out.
1151 */
1152 if (next && next->destroyed ())
1153 return;
1154 }
1155}
1156
1157/*
1158 * monster_can_pick(): If the monster is interested in picking up
1159 * the item, then return 0. Otherwise 0.
1160 * Instead of pick_up, flags for "greed", etc, should be used.
1161 * I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
1162 */
1163
1164int
1165monster_can_pick (object *monster, object *item)
1166{
1167 int flag = 0;
1168 int i;
1169
1170 if (!can_pick (monster, item))
1171 return 0;
1172
1173 if (QUERY_FLAG (item, FLAG_UNPAID))
1174 return 0;
1175
1176 if (monster->pick_up & 64) /* All */
1177 flag = 1;
1178
1179 else
1180 switch (item->type)
1181 {
1182 case MONEY:
1183 case GEM:
1184 flag = monster->pick_up & 2;
1185 break;
1186
1187 case FOOD:
1188 flag = monster->pick_up & 4;
1189 break;
1190
1191 case WEAPON:
1192 flag = (monster->pick_up & 8) || QUERY_FLAG (monster, FLAG_USE_WEAPON);
1193 break;
1194
1195 case ARMOUR:
1196 case SHIELD:
1197 case HELMET:
1198 case BOOTS:
1199 case GLOVES:
1200 case GIRDLE:
1201 flag = (monster->pick_up & 16) || QUERY_FLAG (monster, FLAG_USE_ARMOUR);
1202 break;
1203
1204 case SKILL:
1205 flag = QUERY_FLAG (monster, FLAG_CAN_USE_SKILL);
1206 break;
1207
1208 case RING:
1209 flag = QUERY_FLAG (monster, FLAG_USE_RING);
1210 break;
1211
1212 case WAND:
1213 case HORN:
1214 case ROD:
1215 flag = QUERY_FLAG (monster, FLAG_USE_RANGE);
1216 break;
1217
1218 case SPELLBOOK:
1219 flag = (monster->arch != NULL && QUERY_FLAG ((&monster->arch->clone), FLAG_CAST_SPELL));
1220 break;
1221
1222 case SCROLL:
1223 flag = QUERY_FLAG (monster, FLAG_USE_SCROLL);
1224 break;
1225
1226 case BOW:
1227 case ARROW:
1228 flag = QUERY_FLAG (monster, FLAG_USE_BOW);
1229 break;
1230 }
1231 /* Simplistic check - if the monster has a location to equip it, he will
1232 * pick it up. Note that this doesn't handle cases where an item may
1233 * use several locations.
1234 */
1235 for (i = 0; i < NUM_BODY_LOCATIONS; i++)
1236 {
1237 if (monster->body_info[i] && item->body_info[i])
1238 {
1239 flag = 1;
1240 break;
1241 }
1242 }
1243
1244 if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
1245 return 1;
1246 return 0;
1247}
1248
1249/*
1250 * monster_apply_below():
1251 * Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
1252 * eager to apply things, encounters something apply-able,
1253 * then make him apply it
1254 */
1255
1256void
1257monster_apply_below (object *monster)
1258{
1259 object *tmp, *next;
1260
1261 for (tmp = monster->below; tmp != NULL; tmp = next)
1262 {
1263 next = tmp->below;
1264 switch (tmp->type)
1265 {
1266 case CF_HANDLE:
1267 case TRIGGER:
1268 if (monster->will_apply & 1)
1269 manual_apply (monster, tmp, 0);
1270 break;
1271
1272 case TREASURE:
1273 if (monster->will_apply & 2)
1274 manual_apply (monster, tmp, 0);
1275 break;
1276
1277 }
1278 if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
1279 break;
1280 }
1281} 559}
1282 560
1283/* 561/*
1284 * monster_check_apply() is meant to be called after an item is 562 * monster_check_apply() is meant to be called after an item is
1285 * inserted in a monster. 563 * inserted in a monster.
… …
1287 * a pointer to that object is returned, so it can be dropped. 565 * a pointer to that object is returned, so it can be dropped.
1288 * (so that other monsters can pick it up and use it) 566 * (so that other monsters can pick it up and use it)
1289 * Note that as things are now, monsters never drop something - 567 * Note that as things are now, monsters never drop something -
1290 * they can pick up all that they can use. 568 * they can pick up all that they can use.
1291 */ 569 */
1292
1293/* Sept 96, fixed this so skills will be readied -b.t.*/ 570/* Sept 96, fixed this so skills will be readied -b.t.*/
1294
1295void 571void
1296monster_check_apply (object *mon, object *item) 572monster_check_apply (object *mon, object *item)
1297{ 573{
1298
1299 int flag = 0; 574 int flag = 0;
1300 575
1301 if (item->type == SPELLBOOK && mon->arch != NULL && (QUERY_FLAG ((&mon->arch->clone), FLAG_CAST_SPELL))) 576 if (item->type == SPELLBOOK && mon->arch && (mon->arch->flag [FLAG_CAST_SPELL]))
1302 { 577 {
1303 SET_FLAG (mon, FLAG_CAST_SPELL); 578 mon->set_flag (FLAG_CAST_SPELL);
1304 return; 579 return;
1305 } 580 }
1306 581
1307 /* If for some reason, this item is already applied, no more work to do */ 582 /* If for some reason, this item is already applied, no more work to do */
1308 if (QUERY_FLAG (item, FLAG_APPLIED)) 583 if (item->flag [FLAG_APPLIED])
1309 return; 584 return;
1310 585
1311 /* Might be better not to do this - if the monster can fire a bow, 586 /* Might be better not to do this - if the monster can fire a bow,
1312 * it is possible in his wanderings, he will find one to use. In 587 * it is possible in his wanderings, he will find one to use. In
1313 * which case, it would be nice to have ammo for it. 588 * which case, it would be nice to have ammo for it.
1314 */ 589 */
1315 if (QUERY_FLAG (mon, FLAG_USE_BOW) && item->type == ARROW) 590 if (mon->flag [FLAG_USE_BOW] && item->type == ARROW)
1316 { 591 {
1317 /* Check for the right kind of bow */ 592 /* Check for the right kind of bow */
1318 object *bow; 593 object *bow;
1319 594
1320 for (bow = mon->inv; bow != NULL; bow = bow->below) 595 for (bow = mon->inv; bow; bow = bow->below)
1321 if (bow->type == BOW && bow->race == item->race) 596 if (bow->type == BOW && bow->race == item->race)
1322 { 597 {
1323 SET_FLAG (mon, FLAG_READY_BOW); 598 mon->set_flag (FLAG_READY_BOW);
1324 LOG (llevMonster, "Found correct bow for arrows.\n");
1325 return; /* nothing more to do for arrows */ 599 return; /* nothing more to do for arrows */
1326 } 600 }
1327 } 601 }
1328 602
1329 if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE) 603 if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE)
1330 flag = 1; 604 flag = 1;
1331 /* Eating food gets hp back */ 605 /* Eating food gets hp back */
1332 else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD) 606 else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD)
1333 flag = 1; 607 flag = 1;
1334 else if (item->type == SCROLL && QUERY_FLAG (mon, FLAG_USE_SCROLL)) 608 else if (item->type == SCROLL && mon->flag [FLAG_USE_SCROLL])
1335 { 609 {
1336 if (!item->inv) 610 if (!item->inv)
1337 LOG (llevDebug, "Monster %d having scroll %d with empty inventory!", mon->count, item->count); 611 LOG (llevDebug, "Monster %d having scroll %d with empty inventory!", mon->count, item->count);
1338 else if (monster_should_cast_spell (mon, item->inv)) 612 else if (monster_should_cast_spell (mon, item->inv))
1339 SET_FLAG (mon, FLAG_READY_SCROLL); 613 mon->set_flag (FLAG_READY_SCROLL);
1340 /* Don't use it right now */ 614 /* Don't use it right now */
1341 return; 615 return;
1342 } 616 }
1343 else if (item->type == WEAPON) 617 else if (item->type == WEAPON)
1344 flag = check_good_weapon (mon, item); 618 flag = check_good_weapon (mon, item);
… …
1352 /* We never really 'ready' the wand/rod/horn, because that would mean the 626 /* We never really 'ready' the wand/rod/horn, because that would mean the
1353 * weapon would get undone. 627 * weapon would get undone.
1354 */ 628 */
1355 if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK)) 629 if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
1356 { 630 {
1357 SET_FLAG (mon, FLAG_READY_RANGE); 631 mon->set_flag (FLAG_READY_RANGE);
1358 SET_FLAG (item, FLAG_APPLIED); 632 item->set_flag (FLAG_APPLIED);
1359 } 633 }
1360 return; 634 return;
1361 } 635 }
1362 else if (item->type == BOW) 636 else if (item->type == BOW)
1363 { 637 {
1364 /* We never really 'ready' the bow, because that would mean the 638 /* We never really 'ready' the bow, because that would mean the
1365 * weapon would get undone. 639 * weapon would get undone.
1366 */ 640 */
1367 if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK)) 641 if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
1368 SET_FLAG (mon, FLAG_READY_BOW); 642 mon->set_flag (FLAG_READY_BOW);
1369 return; 643 return;
1370 } 644 }
1371 else if (item->type == SKILL) 645 else if (item->type == SKILL)
1372 { 646 {
1373 /* 647 /*
1374 * skills are specials: monsters must have the 'FLAG_READY_SKILL' flag set, 648 * skills are specials: monsters must have the 'FLAG_READY_SKILL' flag set,
1375 * else they can't use the skill... 649 * else they can't use the skill...
1376 * Skills also don't need to get applied, so return now. 650 * Skills also don't need to get applied, so return now.
1377 */ 651 */
1378 SET_FLAG (mon, FLAG_READY_SKILL); 652 mon->set_flag (FLAG_READY_SKILL);
1379 return; 653 return;
1380 } 654 }
1381 655
1382
1383 /* if we don't match one of the above types, return now. 656 /* if we don't match one of the above types, return now.
1384 * can_apply_object will say that we can apply things like flesh, 657 * can_apply_object will say that we can apply things like flesh,
1385 * bolts, and whatever else, because it only checks against the 658 * bolts, and whatever else, because it only checks against the
1386 * body_info locations. 659 * body_info locations.
1387 */ 660 */
1388 if (!flag) 661 if (!flag)
1389 return; 662 return;
… …
1397 670
1398 /* should only be applying this item, not unapplying it. 671 /* should only be applying this item, not unapplying it.
1399 * also, ignore status of curse so they can take off old armour. 672 * also, ignore status of curse so they can take off old armour.
1400 * monsters have some advantages after all. 673 * monsters have some advantages after all.
1401 */ 674 */
1402 manual_apply (mon, item, AP_APPLY | AP_IGNORE_CURSE); 675 mon->apply (item, AP_APPLY | AP_IGNORE_CURSE);
676}
1403 677
678static int
679can_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)
697 return 1;
698 }
699
1404 return; 700 return 0;
1405} 701}
1406 702
1407void 703static int
1408npc_call_help (object *op)
1409{
1410 int x, y, mflags;
1411 object *npc;
1412 sint16 sx, sy;
1413 maptile *m;
1414
1415 for (x = -3; x < 4; x++)
1416 for (y = -3; y < 4; y++)
1417 {
1418 m = op->map;
1419 sx = op->x + x;
1420 sy = op->y + y;
1421 mflags = get_map_flags (m, &m, sx, sy, &sx, &sy);
1422 /* If nothing alive on this space, no need to search the space. */
1423 if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))
1424 continue;
1425
1426 for (npc = GET_MAP_OB (m, sx, sy); npc != NULL; npc = npc->above)
1427 if (QUERY_FLAG (npc, FLAG_ALIVE) && QUERY_FLAG (npc, FLAG_UNAGGRESSIVE))
1428 npc->enemy = op->enemy;
1429 }
1430}
1431
1432
1433int
1434dist_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv) 704dist_att (int dir, object *ob, object *enemy, object *part, rv_vector *rv)
1435{ 705{
1436
1437 if (can_hit (part, enemy, rv)) 706 if (can_hit (part, enemy, rv))
1438 return dir; 707 return dir;
708
1439 if (rv->distance < 10) 709 if (rv->distance < 10)
1440 return absdir (dir + 4); 710 return absdir (dir + 4);
1441 else if (rv->distance > 18) 711 else if (rv->distance > 18)
1442 return dir; 712 return dir;
713
1443 return 0; 714 return 0;
1444} 715}
1445 716
1446int 717static int
1447run_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv) 718run_att (int dir, object *ob, object *enemy, object *part, rv_vector *rv)
1448{ 719{
1449 720 if (can_hit (part, enemy, rv))
1450 if ((can_hit (part, enemy, rv) && ob->move_status < 20) || ob->move_status < 20)
1451 {
1452 ob->move_status++;
1453 return (dir); 721 return dir;
1454 } 722 else
1455 else if (ob->move_status > 20)
1456 ob->move_status = 0;
1457 return absdir (dir + 4); 723 return absdir (dir + 4);
1458} 724}
1459 725
1460int 726static int
1461hitrun_att (int dir, object *ob, object *enemy) 727hitrun_att (int dir, object *ob, object *enemy)
1462{ 728{
1463 if (ob->move_status++ < 25) 729 if (ob->move_status++ < 25)
1464 return dir; 730 return dir;
1465 else if (ob->move_status < 50) 731 else if (ob->move_status < 50)
1466 return absdir (dir + 4); 732 return absdir (dir + 4);
1467 else 733 else
1468 ob->move_status = 0; 734 ob->move_status = 0;
735
1469 return absdir (dir + 4); 736 return absdir (dir + 4);
1470} 737}
1471 738
1472int 739static int
1473wait_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv) 740wait_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1474{ 741{
1475
1476 int inrange = can_hit (part, enemy, rv); 742 int inrange = can_hit (part, enemy, rv);
1477 743
1478 if (ob->move_status || inrange) 744 if (ob->move_status || inrange)
1479 ob->move_status++; 745 ob->move_status++;
1480 746
… …
1482 return 0; 748 return 0;
1483 else if (ob->move_status < 10) 749 else if (ob->move_status < 10)
1484 return dir; 750 return dir;
1485 else if (ob->move_status < 15) 751 else if (ob->move_status < 15)
1486 return absdir (dir + 4); 752 return absdir (dir + 4);
753
1487 ob->move_status = 0; 754 ob->move_status = 0;
1488 return 0; 755 return 0;
1489} 756}
1490 757
1491int 758static int
1492disthit_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv) 759disthit_att (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1493{ 760{
1494
1495 /* The logic below here looked plain wrong before. Basically, what should 761 /* The logic below here looked plain wrong before. Basically, what should
1496 * happen is that if the creatures hp percentage falls below run_away, 762 * happen is that if the creatures hp percentage falls below run_away,
1497 * the creature should run away (dir+4) 763 * the creature should run away (dir+4)
1498 * I think its wrong for a creature to have a zero maxhp value, but 764 * I think its wrong for a creature to have a zero maxhp value, but
1499 * at least one map has this set, and whatever the map contains, the 765 * at least one map has this set, and whatever the map contains, the
1500 * server should try to be resilant enough to avoid the problem 766 * server should try to be resilant enough to avoid the problem
1501 */ 767 */
1502 if (ob->stats.maxhp && (ob->stats.hp * 100) / ob->stats.maxhp < ob->run_away) 768 if (ob->stats.hp * 100 < ob->stats.maxhp * ob->run_away)
1503 return absdir (dir + 4); 769 return absdir (dir + 4);
770
1504 return dist_att (dir, ob, enemy, part, rv); 771 return dist_att (dir, ob, enemy, part, rv);
1505} 772}
1506 773
1507int 774static int
1508wait_att2 (int dir, object *ob, object *enemy, object *part, rv_vector * rv) 775wait_att2 (int dir, object *ob, object *enemy, object *part, rv_vector * rv)
1509{ 776{
1510 if (rv->distance < 9) 777 if (rv->distance < 9)
1511 return absdir (dir + 4); 778 return absdir (dir + 4);
779
1512 return 0; 780 return 0;
1513} 781}
1514 782
1515void 783static void
1516circ1_move (object *ob) 784circ1_move (object *ob)
1517{ 785{
1518 static int circle[12] = { 3, 3, 4, 5, 5, 6, 7, 7, 8, 1, 1, 2 }; 786 static int circle[12] = { 3, 3, 4, 5, 5, 6, 7, 7, 8, 1, 1, 2 };
787
1519 if (++ob->move_status > 11) 788 if (++ob->move_status > 11)
1520 ob->move_status = 0; 789 ob->move_status = 0;
790
1521 if (!(move_object (ob, circle[ob->move_status]))) 791 if (!(ob->move (circle[ob->move_status])))
1522 (void) move_object (ob, RANDOM () % 8 + 1); 792 ob->move (rndm (8) + 1);
1523} 793}
1524 794
1525void 795static void
1526circ2_move (object *ob) 796circ2_move (object *ob)
1527{ 797{
1528 static int circle[20] = { 3, 3, 3, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 1, 1, 1, 2, 2 }; 798 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
1529 if (++ob->move_status > 19) 800 if (++ob->move_status > 19)
1530 ob->move_status = 0; 801 ob->move_status = 0;
802
1531 if (!(move_object (ob, circle[ob->move_status]))) 803 if (!(ob->move (circle[ob->move_status])))
1532 (void) move_object (ob, RANDOM () % 8 + 1); 804 ob->move (rndm (8) + 1);
1533} 805}
1534 806
1535void 807static void
1536pace_movev (object *ob) 808pace_movev (object *ob)
1537{ 809{
1538 if (ob->move_status++ > 6) 810 if (ob->move_status++ > 6)
1539 ob->move_status = 0; 811 ob->move_status = 0;
812
1540 if (ob->move_status < 4) 813 if (ob->move_status < 4)
1541 (void) move_object (ob, 5); 814 ob->move (5);
1542 else 815 else
1543 (void) move_object (ob, 1); 816 ob->move (1);
1544} 817}
1545 818
1546void 819static void
1547pace_moveh (object *ob) 820pace_moveh (object *ob)
1548{ 821{
1549 if (ob->move_status++ > 6) 822 if (ob->move_status++ > 6)
1550 ob->move_status = 0; 823 ob->move_status = 0;
824
1551 if (ob->move_status < 4) 825 if (ob->move_status < 4)
1552 (void) move_object (ob, 3); 826 ob->move (3);
1553 else 827 else
1554 (void) move_object (ob, 7); 828 ob->move (7);
1555} 829}
1556 830
1557void 831static void
1558pace2_movev (object *ob) 832pace2_movev (object *ob)
1559{ 833{
1560 if (ob->move_status++ > 16) 834 if (ob->move_status++ > 16)
1561 ob->move_status = 0; 835 ob->move_status = 0;
836
1562 if (ob->move_status < 6) 837 if (ob->move_status < 6)
1563 (void) move_object (ob, 5); 838 ob->move (5);
1564 else if (ob->move_status < 8) 839 else if (ob->move_status < 8)
1565 return; 840 return;
1566 else if (ob->move_status < 13) 841 else if (ob->move_status < 13)
1567 (void) move_object (ob, 1); 842 ob->move (1);
1568 else 843 else
1569 return; 844 return;
1570} 845}
1571 846
1572void 847static void
1573pace2_moveh (object *ob) 848pace2_moveh (object *ob)
1574{ 849{
1575 if (ob->move_status++ > 16) 850 if (ob->move_status++ > 16)
1576 ob->move_status = 0; 851 ob->move_status = 0;
852
1577 if (ob->move_status < 6) 853 if (ob->move_status < 6)
1578 (void) move_object (ob, 3); 854 ob->move (3);
1579 else if (ob->move_status < 8) 855 else if (ob->move_status < 8)
1580 return; 856 return;
1581 else if (ob->move_status < 13) 857 else if (ob->move_status < 13)
1582 (void) move_object (ob, 7); 858 ob->move (7);
1583 else 859 else
1584 return; 860 return;
1585} 861}
1586 862
863static void
864rand_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}
871
872#define MAX_KNOWN_SPELLS 20
873
874/* Returns a randomly selected spell. This logic is still
875 * less than ideal. This code also only seems to deal with
876 * wizard spells, as the check is against sp, and not grace.
877 * can mosnters know cleric spells?
878 */
879static object *
880monster_choose_random_spell (object *monster)
881{
882 object *altern[MAX_KNOWN_SPELLS];
883 int i = 0;
884
885 for (object *tmp = monster->inv; tmp; tmp = tmp->below)
886 if (tmp->type == SPELLBOOK || tmp->type == SPELL)
887 {
888 /* Check and see if it's actually a useful spell.
889 * If its a spellbook, the spell is actually the inventory item.
890 * if it is a spell, then it is just the object itself.
891 */
892 if (monster_should_cast_spell (monster, (tmp->type == SPELLBOOK) ? tmp->inv : tmp))
893 {
894 altern [i++] = tmp;
895
896 if (i == MAX_KNOWN_SPELLS)
897 break;
898 }
899 }
900
901 return i ? altern [rndm (i)] : 0;
902}
903
904/* This checks to see if the monster should cast a spell/ability.
905 * it returns true if the monster casts a spell, 0 if he doesn't.
906 * head is the head of the monster.
907 * part is the part of the monster we are checking against.
908 * pl is the target.
909 * dir is the direction to case.
910 * rv is the vector which describes where the enemy is.
911 */
912static int
913monster_cast_spell (object *head, object *part, object *pl, int dir, rv_vector * rv)
914{
915 object *spell_item;
916 object *owner;
917 rv_vector rv1;
918
919 /* If you want monsters to cast spells over friends, this spell should
920 * be removed. It probably should be in most cases, since monsters still
921 * don't care about residual effects (ie, casting a cone which may have a
922 * clear path to the player, the side aspects of the code will still hit
923 * other monsters)
924 */
925 if (!(dir = path_to_player (part, pl, 0)))
926 return 0;
927
928 if (head->flag [FLAG_FRIENDLY] && (owner = head->owner) != NULL)
929 {
930 get_rangevector (head, owner, &rv1, 0x1);
931 if (dirdiff (dir, rv1.direction) < 2)
932 return 0; /* Might hit owner with spell */
933 }
934
935 if (head->flag [FLAG_CONFUSED])
936 dir = absdir (dir + rndm (3) + rndm (3) - 2);
937
938 /* If the monster hasn't already chosen a spell, choose one
939 * I'm not sure if it really make sense to pre-select spells (events
940 * could be different by the time the monster goes again).
941 */
942 if (head->spellitem == NULL)
943 {
944 if ((spell_item = monster_choose_random_spell (head)) == NULL)
945 {
946 head->clr_flag (FLAG_CAST_SPELL); /* Will be turned on when picking up book */
947 return 0;
948 }
949
950 if (spell_item->type == SPELLBOOK)
951 {
952 if (!spell_item->inv)
953 {
954 LOG (llevError, "spellbook %s does not contain a spell?\n", &spell_item->name);
955 return 0;
956 }
957
958 spell_item = spell_item->inv;
959 }
960 }
961 else
962 spell_item = head->spellitem;
963
964 if (!spell_item)
965 return 0;
966
967 /* Best guess this is a defensive/healing spell */
968 if (spell_item->range <= 1 || spell_item->stats.dam < 0)
969 dir = 0;
970
971 /* Monster doesn't have enough spell-points */
972 if (head->stats.sp < SP_level_spellpoint_cost (head, spell_item, SPELL_MANA))
973 return 0;
974
975 if (head->stats.grace < SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE))
976 return 0;
977
978 head->stats.sp -= SP_level_spellpoint_cost (head, spell_item, SPELL_MANA);
979 head->stats.grace -= SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE);
980
981 /* set this to null, so next time monster will choose something different */
982 head->spellitem = NULL;
983
984 return cast_spell (part, part, dir, spell_item, NULL);
985}
986
987static int
988monster_use_scroll (object *head, object *part, object *pl, int dir, rv_vector * rv)
989{
990 object *scroll;
991 object *owner;
992 rv_vector rv1;
993
994 /* If you want monsters to cast spells over friends, this spell should
995 * be removed. It probably should be in most cases, since monsters still
996 * don't care about residual effects (ie, casting a cone which may have a
997 * clear path to the player, the side aspects of the code will still hit
998 * other monsters)
999 */
1000 if (!(dir = path_to_player (part, pl, 0)))
1001 return 0;
1002
1003 if (head->flag [FLAG_FRIENDLY] && (owner = head->owner) != NULL)
1004 {
1005 get_rangevector (head, owner, &rv1, 0x1);
1006 if (dirdiff (dir, rv1.direction) < 2)
1007 {
1008 return 0; /* Might hit owner with spell */
1009 }
1010 }
1011
1012 if (head->flag [FLAG_CONFUSED])
1013 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1014
1015 for (scroll = head->inv; scroll; scroll = scroll->below)
1016 if (scroll->type == SCROLL && monster_should_cast_spell (head, scroll->inv))
1017 break;
1018
1019 /* Used up all his scrolls, so nothing do to */
1020 if (!scroll)
1021 {
1022 head->clr_flag (FLAG_READY_SCROLL);
1023 return 0;
1024 }
1025
1026 /* Spell should be cast on caster (ie, heal, strength) */
1027 if (scroll->inv->range == 0)
1028 dir = 0;
1029
1030 apply_scroll (part, scroll, dir);
1031 return 1;
1032}
1033
1034/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.
1035 * Note that monsters do not need the skills SK_MELEE_WEAPON and
1036 * SK_MISSILE_WEAPON to make those respective attacks, if we
1037 * required that we would drastically increase the memory
1038 * requirements of CF!!
1039 *
1040 * The skills we are treating here are all but those. -b.t.
1041 *
1042 * At the moment this is only useful for throwing, perhaps for
1043 * stealing. TODO: This should be more integrated in the game. -MT, 25.11.01
1044 */
1045static int
1046monster_use_skill (object *head, object *part, object *pl, int dir)
1047{
1048 object *skill, *owner;
1049
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);
1078 return 0;
1079 }
1080
1081 /* use skill */
1082 return do_skill (head, part, head->chosen_skill, dir, NULL);
1083}
1084
1085/* Monster will use a ranged spell attack. */
1086static int
1087monster_use_range (object *head, object *part, object *pl, int dir)
1088{
1089 object *wand, *owner;
1090 int at_least_one = 0;
1091
1092 if (!(dir = path_to_player (part, pl, 0)))
1093 return 0;
1094
1095 if (head->flag [FLAG_FRIENDLY] && (owner = head->owner) != NULL)
1096 {
1097 int dir2 = find_dir_2 (owner->x - head->x, owner->y - head->y);
1098
1099 if (dirdiff (dir, dir2) < 2)
1100 return 0; /* Might hit owner with spell */
1101 }
1102
1103 if (head->flag [FLAG_CONFUSED])
1104 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1105
1106 for (wand = head->inv; wand; wand = wand->below)
1107 {
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))
1118 {
1119 if (wand->arch)
1120 {
1121 wand->clr_flag (FLAG_ANIMATE);
1122 wand->face = wand->arch->face;
1123 wand->set_speed (0);
1124 }
1125 }
1126 /* Success */
1127 return 1;
1128 }
1129 else if (wand->type == ROD || wand->type == HORN)
1130 {
1131 /* Found rod/horn, let's use it if possible */
1132 at_least_one = 1;
1133 if (wand->stats.hp < max (wand->inv->stats.sp, wand->inv->stats.grace))
1134 continue;
1135
1136 /* drain charge before casting spell - can be a case where the
1137 * spell destroys the monster, and rod, so if done after, results
1138 * in crash.
1139 */
1140 drain_rod_charge (wand);
1141 cast_spell (head, wand, dir, wand->inv, NULL);
1142
1143 /* Success */
1144 return 1;
1145 }
1146 }
1147
1148 if (at_least_one)
1149 return 0;
1150
1151 LOG (llevError, "Error: Monster %s (%d) HAS_READY_RANGE() without wand/horn/rod.\n", &head->name, head->count);
1152 head->clr_flag (FLAG_READY_RANGE);
1153 return 0;
1154}
1155
1156static int
1157monster_use_bow (object *head, object *part, object *pl, int dir)
1158{
1159 object *owner;
1160
1161 if (!(dir = path_to_player (part, pl, 0)))
1162 return 0;
1163
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 {
1169 int dir2 = find_dir_2 (owner->x - head->x, owner->y - head->y);
1170
1171 if (dirdiff (dir, dir2) < 1)
1172 return 0; /* Might hit owner with arrow */
1173 }
1174
1175 /* in server/player.c */
1176 return fire_bow (head, part, NULL, dir, 0, part->x, part->y);
1177
1178}
1179
1587void 1180void
1588rand_move (object *ob) 1181npc_call_help (object *op)
1589{ 1182{
1590 int i; 1183 unordered_mapwalk (mapwalk_buf, op, -7, -7, 7, 7)
1184 {
1185 mapspace &ms = m->at (nx, ny);
1591 1186
1592 if (ob->move_status < 1 || ob->move_status > 8 || !(move_object (ob, ob->move_status || !(RANDOM () % 9)))) 1187 /* If nothing alive on this space, no need to search the space. */
1593 for (i = 0; i < 5; i++) 1188 if (!(ms.flags () & P_IS_ALIVE))
1594 if (move_object (ob, ob->move_status = RANDOM () % 8 + 1)) 1189 continue;
1595 return; 1190
1191 for (object *npc = ms.bot; npc; npc = npc->above)
1192 if (npc->flag [FLAG_ALIVE] && npc->flag [FLAG_UNAGGRESSIVE])
1193 npc->enemy = op->enemy;
1194 }
1596} 1195}
1597 1196
1598void 1197void
1599check_earthwalls (object *op, maptile *m, int x, int y) 1198check_earthwalls (object *op, maptile *m, int x, int y)
1600{ 1199{
1601 object *tmp;
1602
1603 for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above) 1200 for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1604 {
1605 if (tmp->type == EARTHWALL) 1201 if (tmp->type == EARTHWALL)
1606 { 1202 {
1607 hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1); 1203 hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1);
1608 return; 1204 return;
1609 } 1205 }
1610 }
1611} 1206}
1612 1207
1613void 1208void
1614check_doors (object *op, maptile *m, int x, int y) 1209check_doors (object *op, maptile *m, int x, int y)
1615{ 1210{
1616 object *tmp;
1617
1618 for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above) 1211 for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1619 {
1620 if (tmp->type == DOOR) 1212 if (tmp->type == DOOR)
1621 { 1213 {
1622 hit_player (tmp, 1000, op, AT_PHYSICAL, 1); 1214 hit_player (tmp, 1000, op, AT_PHYSICAL, 1);
1623 return; 1215 return;
1624 } 1216 }
1625 }
1626} 1217}
1627 1218
1628/* find_mon_throw_ob() - modeled on find_throw_ob 1219/* find_mon_throw_ob() - modeled on find_throw_ob
1629 * This is probably overly simplistic as it is now - We want 1220 * This is probably overly simplistic as it is now - We want
1630 * monsters to throw things like chairs and other pieces of 1221 * monsters to throw things like chairs and other pieces of
1631 * furniture, even if they are not good throwable objects. 1222 * furniture, even if they are not good throwable objects.
1632 * Probably better to have the monster throw a throwable object 1223 * Probably better to have the monster throw a throwable object
1633 * first, then throw any non equipped weapon. 1224 * first, then throw any non equipped weapon.
1634 */ 1225 */
1635
1636object * 1226object *
1637find_mon_throw_ob (object *op) 1227find_mon_throw_ob (object *op)
1638{ 1228{
1639 object *tmp = NULL; 1229 object *tmp = NULL;
1640 1230
… …
1644 tmp = op; 1234 tmp = op;
1645 1235
1646 /* 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
1647 * marked item and throw it to the enemy. 1237 * marked item and throw it to the enemy.
1648 */ 1238 */
1649
1650 for (tmp = op->inv; tmp; tmp = tmp->below) 1239 for (tmp = op->inv; tmp; tmp = tmp->below)
1651 { 1240 {
1652
1653 /* Can't throw invisible objects or items that are applied */ 1241 /* Can't throw invisible objects or items that are applied */
1654 if (tmp->invisible || QUERY_FLAG (tmp, FLAG_APPLIED)) 1242 if (tmp->invisible || tmp->flag [FLAG_APPLIED])
1655 continue; 1243 continue;
1656 1244
1657 if (QUERY_FLAG (tmp, FLAG_IS_THROWN)) 1245 if (tmp->flag [FLAG_IS_THROWN])
1658 break; 1246 break;
1659 1247
1660 } 1248 }
1661 1249
1662#ifdef DEBUG_THROW 1250#ifdef DEBUG_THROW
… …
1664#endif 1252#endif
1665 1253
1666 return tmp; 1254 return tmp;
1667} 1255}
1668 1256
1257/*
1258 * Move-monster returns 1 if the object has been freed, otherwise 0.
1259 */
1260int
1261move_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 = 0;
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;
1659}
1660
1669/* 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
1670 * 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
1671 * 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.
1672 * modified by MSW to use the get_rangevector so that map tiling works 1664 * modified by MSW to use the get_rangevector so that map tiling works
1673 * 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
1674 * 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
1675 * be within the valid range. MSW 2001-08-05 1667 * be within the valid range. MSW 2001-08-05
1676 * 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
1677 */ 1669 */
1678
1679int 1670int
1680can_detect_enemy (object *op, object *enemy, rv_vector * rv) 1671can_detect_enemy (object *op, object *enemy, rv_vector * rv)
1681{ 1672{
1682 int radius = MIN_MON_RADIUS, hide_discovery;
1683
1684 /* null detection for any of these condtions always */ 1673 /* null detection for any of these condtions always */
1685 if (!op || !enemy || !op->map || !enemy->map) 1674 if (!op || !enemy || !op->map || !enemy->map)
1686 return 0; 1675 return 0;
1687 1676
1688 /* 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 */
… …
1690 return 0; 1679 return 0;
1691 1680
1692 get_rangevector (op, enemy, rv, 0); 1681 get_rangevector (op, enemy, rv, 0);
1693 1682
1694 /* Monsters always ignore the DM */ 1683 /* Monsters always ignore the DM */
1695 if ((op->type != PLAYER) && QUERY_FLAG (enemy, FLAG_WIZ)) 1684 if (!op->is_player () && enemy->flag [FLAG_WIZ])
1696 return 0; 1685 return 0;
1697 1686
1698 /* simple check. Should probably put some range checks in here. */ 1687 /* simple check. Should probably put some range checks in here. */
1699 if (can_see_enemy (op, enemy)) 1688 if (can_see_enemy (op, enemy))
1700 return 1; 1689 return 1;
1701 1690
1702 /* 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
1703 * finding enemies! 1692 * finding enemies!
1704 */ 1693 */
1705 if (op->type == PLAYER) 1694 if (op->is_player ())
1706 return 0; 1695 return 0;
1707 1696
1708 /* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE 1697 /* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE
1709 * 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
1710 */ 1699 */
1711 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)))
1712 return 0; 1701 return 0;
1713 1702
1703 int radius = MIN_MON_RADIUS;
1704
1714 /* use this for invis also */ 1705 /* use this for invis also */
1715 hide_discovery = op->stats.Int / 5; 1706 int hide_discovery = op->stats.Int / 5;
1716 1707
1717 /* Determine Detection radii */ 1708 /* Determine Detection radii */
1718 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) */
1719 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);
1720 else 1711 else
1721 { /* a level/INT/Dex adjustment for hiding */ 1712 { /* a level/INT/Dex adjustment for hiding */
1722 object *sk_hide;
1723 int bonus = (op->level / 2) + (op->stats.Int / 5); 1713 int bonus = op->level / 2 + op->stats.Int / 5;
1724 1714
1725 if (enemy->type == PLAYER) 1715 if (enemy->is_player ())
1726 { 1716 {
1727 if ((sk_hide = find_skill_by_number (enemy, SK_HIDING))) 1717 if (object *sk_hide = find_skill_by_number (enemy, SK_HIDING))
1728 bonus -= sk_hide->level; 1718 bonus -= sk_hide->level;
1729 else 1719 else
1730 { 1720 {
1731 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");
1732 make_visible (enemy); 1722 make_visible (enemy);
… …
1738 1728
1739 radius += bonus / 5; 1729 radius += bonus / 5;
1740 hide_discovery += bonus * 5; 1730 hide_discovery += bonus * 5;
1741 } /* else creature has modifiers for hiding */ 1731 } /* else creature has modifiers for hiding */
1742 1732
1743 /* Radii stealth adjustment. Only if you are stealthy 1733 /* Radii stealth adjustment. Only if you are stealthy
1744 * will you be able to sneak up closer to creatures */ 1734 * will you be able to sneak up closer to creatures */
1745 if (QUERY_FLAG (enemy, FLAG_STEALTH)) 1735 if (enemy->flag [FLAG_STEALTH])
1746 radius = radius / 2, hide_discovery = hide_discovery / 3; 1736 {
1737 radius /= 2;
1738 hide_discovery /= 3;
1739 }
1747 1740
1748 /* Radii adjustment for enemy standing in the dark */ 1741 /* Radii adjustment for enemy standing in the dark */
1749 if (op->map->darkness > 0 && !stand_in_light (enemy)) 1742 if (!stand_in_light (enemy))
1750 { 1743 {
1751 /* on dark maps body heat can help indicate location with infravision 1744 /* on dark maps body heat can help indicate location with infravision
1752 * undead don't have body heat, so no benefit detecting them. 1745 * undead don't have body heat, so no benefit detecting them.
1753 */ 1746 */
1754 if (QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !is_true_undead (enemy)) 1747 if (op->flag [FLAG_SEE_IN_DARK] && !is_true_undead (enemy))
1755 radius += op->map->darkness / 2; 1748 radius += op->map->darklevel () / 2;
1756 else 1749 else
1757 radius -= op->map->darkness / 2; 1750 radius -= op->map->darklevel () / 2;
1758 1751
1759 /* op next to a monster (and not in complete darkness) 1752 /* op next to a monster (and not in complete darkness)
1760 * the monster should have a chance to see you. 1753 * the monster should have a chance to see you.
1761 */ 1754 */
1762 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)
1763 radius = MIN_MON_RADIUS; 1756 radius = MIN_MON_RADIUS;
1764 } /* if on dark map */ 1757 } /* if on dark map */
1765 1758
1766 /* Lets not worry about monsters that have incredible detection 1759 /* Lets not worry about monsters that have incredible detection
1767 * 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
… …
1769 * 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
1770 * do something. Note that the distance field in the 1763 * do something. Note that the distance field in the
1771 * 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
1772 * find that. 1765 * find that.
1773 */ 1766 */
1774 if (radius > 13) 1767 // note that the above reasoning was utter bullshit even at the time it was written
1775 radius = 13; 1768 // we use 25, lets see if we have the cpu time for it
1769 min_it (radius, 25);
1776 1770
1777 /* Enemy in range! Now test for detection */ 1771 /* Enemy in range! Now test for detection */
1778 if ((int) rv->distance <= radius) 1772 if (rv->distance <= radius)
1779 { 1773 {
1780 /* ah, we are within range, detected? take cases */ 1774 /* ah, we are within range, detected? take cases */
1781 if (!enemy->invisible) /* enemy in dark squares... are seen! */ 1775 if (!enemy->invisible) /* enemy in dark squares... are seen! */
1782 return 1; 1776 return 1;
1783 1777
1784 /* hidden or low-quality invisible */ 1778 /* hidden or low-quality invisible */
1785 if (enemy->hide && (rv->distance <= 1) && (RANDOM () % 100 <= hide_discovery)) 1779 if (enemy->flag [FLAG_HIDDEN] && rv->distance <= 1 && rndm (100) <= hide_discovery)
1786 { 1780 {
1787 make_visible (enemy); 1781 make_visible (enemy);
1782
1788 /* inform players of new status */ 1783 /* inform players of new status */
1789 if (enemy->type == PLAYER && player_can_view (enemy, op)) 1784 if (enemy->type == PLAYER && player_can_view (enemy, op))
1790 new_draw_info_format (NDI_UNIQUE, 0, enemy, "You are discovered by %s!", &op->name); 1785 new_draw_info_format (NDI_UNIQUE, 0, enemy, "You are discovered by %s!", &op->name);
1786
1791 return 1; /* detected enemy */ 1787 return 1; /* detected enemy */
1792 } 1788 }
1793 else if (enemy->invisible) 1789 else if (enemy->invisible)
1794 { 1790 {
1795 /* Change this around - instead of negating the invisible, just 1791 /* Change this around - instead of negating the invisible, just
1796 * 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
1797 * do something to you. Decreasing the duration of invisible 1793 * do something to you. Decreasing the duration of invisible
1798 * 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
1799 * can then basically negate the spell. The spell isn't negated - 1795 * can then basically negate the spell. The spell isn't negated -
1800 * they just know where you are! 1796 * they just know where you are!
1801 */ 1797 */
1802 if ((RANDOM () % 50) <= hide_discovery) 1798 if (rndm (50) <= hide_discovery)
1803 { 1799 {
1804 if (enemy->type == PLAYER) 1800 if (enemy->type == PLAYER)
1805 {
1806 new_draw_info_format (NDI_UNIQUE, 0, enemy, "You see %s noticing your position.", query_name (op)); 1801 new_draw_info_format (NDI_UNIQUE, 0, enemy, "You see %s noticing your position.", query_name (op));
1807 } 1802
1808 return 1; 1803 return 1;
1809 } 1804 }
1810 } 1805 }
1811 } /* within range */ 1806 } /* within range */
1812 1807
1813 /* Wasn't detected above, so still hidden */ 1808 /* Wasn't detected above, so still hidden */
1814 return 0; 1809 return 0;
1815} 1810}
1816 1811
1817/* 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
1818 * intellegent algorithm. For one thing, we ignore los here, SO it 1813 * intelligent algorithm. For one thing, we ignore los here, SO it
1819 * 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
1820 * other side of a wall (!). 1815 * other side of a wall (!).
1821 */ 1816 */
1822
1823int 1817int
1824stand_in_light (object *op) 1818stand_in_light (object *op)
1825{ 1819{
1826 sint16 nx, ny;
1827 maptile *m;
1828
1829
1830 if (!op) 1820 if (op)
1821 {
1822 if (!op->is_on_map ())
1831 return 0; 1823 return 0;
1824
1825 if (op->map->darklevel () <= 0)
1826 return 1;
1827
1832 if (op->glow_radius > 0) 1828 if (op->glow_radius > 0)
1833 return 1; 1829 return 1;
1834 1830
1835 if (op->map) 1831 if (op->map)
1836 { 1832 unordered_mapwalk (mapwalk_buf, op, -MAX_LIGHT_RADIUS, -MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS)
1837 int x, y, x1, y1; 1833 {
1834 mapspace &ms = m->at (nx, ny);
1838 1835
1836 ms.update ();
1839 1837
1840
1841 /* 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
1842 * 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.
1843 */
1844 for (x = op->x - MAX_LIGHT_RADII; x <= op->x + MAX_LIGHT_RADII; x++)
1845 {
1846 for (y = op->y - MAX_LIGHT_RADII; y <= op->y + MAX_LIGHT_RADII; y++)
1847 { 1840 */
1848 m = op->map; 1841 int light = ms.light;
1849 nx = x;
1850 ny = y;
1851 1842
1852 if (get_map_flags (m, &m, nx, ny, &nx, &ny) & P_OUT_OF_MAP) 1843 if (expect_false (light > 0) && idistance (dx, dy) <= light)
1853 continue;
1854
1855 x1 = abs (x - op->x) * abs (x - op->x);
1856 y1 = abs (y - op->y) * abs (y - op->y);
1857 if (isqrt (x1 + y1) < GET_MAP_LIGHT (m, nx, ny))
1858 return 1; 1844 return 1;
1859 } 1845 }
1860 }
1861 } 1846 }
1847
1862 return 0; 1848 return 0;
1863} 1849}
1864 1850
1865
1866/* assuming no walls/barriers, lets check to see if its *possible* 1851/* assuming no walls/barriers, lets check to see if its *possible*
1867 * to see an enemy. Note, "detection" is different from "seeing". 1852 * to see an enemy. Note, "detection" is different from "seeing".
1868 * See can_detect_enemy() for more details. -b.t. 1853 * See can_detect_enemy() for more details. -b.t.
1869 * return 0 if can't be seen, 1 if can be 1854 * return 0 if can't be seen, 1 if can be
1870 */ 1855 */
1871
1872int 1856int
1873can_see_enemy (object *op, object *enemy) 1857can_see_enemy (object *op, object *enemy)
1874{ 1858{
1875 object *looker = op->head ? op->head : op; 1859 object *looker = op->head ? op->head : op;
1876 1860
1877 /* safety */ 1861 /* safety */
1878 if (!looker || !enemy || !QUERY_FLAG (looker, FLAG_ALIVE)) 1862 if (!looker || !enemy || !looker->flag [FLAG_ALIVE])
1879 return 0; 1863 return 0;
1880 1864
1881 /* 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,
1882 * 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
1883 * blind even if you can xray? 1867 * blind even if you can xray?
1884 */ 1868 */
1885 if (QUERY_FLAG (looker, FLAG_BLIND) && !QUERY_FLAG (looker, FLAG_XRAYS)) 1869 if (looker->flag [FLAG_BLIND] && !looker->flag [FLAG_XRAYS])
1886 return 0; 1870 return 0;
1887 1871
1888 /* checking for invisible things */ 1872 /* checking for invisible things */
1889 if (enemy->invisible) 1873 if (enemy->invisible)
1890 { 1874 {
1891 /* HIDDEN ENEMY. by definition, you can't see hidden stuff! 1875 /* HIDDEN ENEMY. by definition, you can't see hidden stuff!
1892 * However,if you carry any source of light, then the hidden 1876 * However,if you carry any source of light, then the hidden
1893 * creature is seeable (and stupid) */ 1877 * creature is seeable (and stupid) */
1894 1878
1895 if (has_carried_lights (enemy)) 1879 if (enemy->has_carried_lights ())
1896 { 1880 {
1897 if (enemy->hide) 1881 if (enemy->flag [FLAG_HIDDEN])
1898 { 1882 {
1899 make_visible (enemy); 1883 make_visible (enemy);
1900 new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!"); 1884 new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!");
1901 } 1885 }
1886
1902 return 1; 1887 return 1;
1903 } 1888 }
1904 else if (enemy->hide) 1889 else if (enemy->flag [FLAG_HIDDEN])
1905 return 0; 1890 return 0;
1906 1891
1907 /* Invisible enemy. Break apart the check for invis undead/invis looker 1892 /* Invisible enemy. Break apart the check for invis undead/invis looker
1908 * 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,
1909 * and making it a conditional makes the code pretty ugly. 1894 * and making it a conditional makes the code pretty ugly.
1910 */ 1895 */
1911 if (!QUERY_FLAG (looker, FLAG_SEE_INVISIBLE)) 1896 if (!looker->flag [FLAG_SEE_INVISIBLE])
1912 {
1913 if (makes_invisible_to (enemy, looker)) 1897 if (makes_invisible_to (enemy, looker))
1914 return 0; 1898 return 0;
1915 }
1916 } 1899 }
1917 else if (looker->type == PLAYER) /* for players, a (possible) shortcut */ 1900 else if (looker->is_player ()) /* for players, a (possible) shortcut */
1918 if (player_can_view (looker, enemy)) 1901 if (player_can_view (looker, enemy))
1919 return 1; 1902 return 1;
1920 1903
1921 /* ENEMY IN DARK MAP. Without infravision, the enemy is not seen 1904 /* ENEMY IN DARK MAP. Without infravision, the enemy is not seen
1922 * unless they carry a light or stand in light. Darkness doesnt 1905 * unless they carry a light or stand in light. Darkness doesnt
1923 * inhibit the undead per se (but we should give their archs 1906 * inhibit the undead per se (but we should give their archs
1924 * CAN_SEE_IN_DARK, this is just a safety 1907 * CAN_SEE_IN_DARK, this is just a safety
1925 * we care about the enemy maps status, not the looker. 1908 * we care about the enemy maps status, not the looker.
1926 * only relevant for tiled maps, but it is possible that the 1909 * only relevant for tiled maps, but it is possible that the
1927 * 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
1928 * case, the looker can still see the enemy 1911 * case, the looker can still see the enemy
1929 */ 1912 */
1930 if (enemy->map->darkness > 0 && !stand_in_light (enemy) 1913 if (!stand_in_light (enemy)
1931 && (!QUERY_FLAG (looker, FLAG_SEE_IN_DARK) || !is_true_undead (looker) || !QUERY_FLAG (looker, FLAG_XRAYS))) 1914 && (!looker->flag [FLAG_SEE_IN_DARK] || !is_true_undead (looker) || !looker->flag [FLAG_XRAYS]))
1932 return 0; 1915 return 0;
1933 1916
1934 return 1; 1917 return 1;
1935} 1918}
1919
1920//-GPL

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