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Comparing deliantra/server/server/monster.C (file contents):
Revision 1.35 by root, Mon Jun 4 13:04:00 2007 UTC vs.
Revision 1.90 by root, Sat May 15 23:41:06 2010 UTC

1/* 1/*
2 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team 4 * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team 5 * Copyright (©) 2002 Mark Wedel & Crossfire Development Team
6 * Copyright (©) 1992,2007 Frank Tore Johansen 6 * Copyright (©) 1992 Frank Tore Johansen
7 * 7 *
8 * Crossfire TRT is free software; you can redistribute it and/or modify it 8 * Deliantra is free software: you can redistribute it and/or modify it under
9 * under the terms of the GNU General Public License as published by the Free 9 * the terms of the Affero GNU General Public License as published by the
10 * Software Foundation; either version 2 of the License, or (at your option) 10 * Free Software Foundation, either version 3 of the License, or (at your
11 * any later version. 11 * option) any later version.
12 * 12 *
13 * This program is distributed in the hope that it will be useful, but 13 * This program is distributed in the hope that it will be useful,
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * for more details. 16 * GNU General Public License for more details.
17 * 17 *
18 * You should have received a copy of the GNU General Public License along 18 * You should have received a copy of the Affero GNU General Public License
19 * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 19 * and the GNU General Public License along with this program. If not, see
20 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 * <http://www.gnu.org/licenses/>.
21 * 21 *
22 * The authors can be reached via e-mail to <crossfire@schmorp.de> 22 * The authors can be reached via e-mail to <support@deliantra.net>
23 */ 23 */
24
25//+GPL
24 26
25#include <global.h> 27#include <global.h>
26#include <sproto.h> 28#include <sproto.h>
27#include <spells.h> 29#include <spells.h>
28#include <skills.h> 30#include <skills.h>
… …
36 * set to sane values. 38 * set to sane values.
37 */ 39 */
38object * 40object *
39check_enemy (object *npc, rv_vector * rv) 41check_enemy (object *npc, rv_vector * rv)
40{ 42{
41
42 /* if this is pet, let him attack the same enemy as his owner 43 /* if this is pet, let him attack the same enemy as his owner
43 * TODO: when there is no ower enemy, try to find a target, 44 * TODO: when there is no ower enemy, try to find a target,
44 * which CAN attack the owner. */ 45 * which CAN attack the owner. */
45 if ((npc->attack_movement & HI4) == PETMOVE) 46 if ((npc->attack_movement & HI4) == PETMOVE)
46 { 47 {
… …
48 npc->enemy = NULL; 49 npc->enemy = NULL;
49 else if (npc->enemy == NULL) 50 else if (npc->enemy == NULL)
50 npc->enemy = npc->owner->enemy; 51 npc->enemy = npc->owner->enemy;
51 } 52 }
52 53
53 /* periodically, a monster mayu change its target. Also, if the object 54 /* periodically, a monster may change its target. Also, if the object
54 * has been destroyed, etc, clear the enemy. 55 * has been destroyed, etc, clear the enemy.
55 * TODO: this should be changed, because it invokes to attack forced or 56 * TODO: this should be changed, because it invokes to attack forced or
56 * attacked monsters to leave the attacker alone, before it is destroyed 57 * attacked monsters to leave the attacker alone, before it is destroyed
57 */ 58 */
58 /* i had removed the random target leave, this invokes problems with friendly 59 /* I had removed the random target leave, this invokes problems with friendly
59 * objects, getting attacked and defending herself - they don't try to attack 60 * objects, getting attacked and defending herself - they don't try to attack
60 * again then but perhaps get attack on and on 61 * 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 62 * If we include a aggravated flag in , we can handle evil vs evil and good vs good
62 * too. */ 63 * too. */
63 64
64 if (npc->enemy) 65 if (npc->enemy)
65 { 66 {
66 /* I broke these if's apart to better be able to see what 67 /* I broke these if's apart to better be able to see what
67 * the grouping checks are. Code is the same. 68 * the grouping checks are. Code is the same.
68 */ 69 */
69 if (QUERY_FLAG (npc->enemy, FLAG_REMOVED) || 70 if (npc->enemy->flag [FLAG_REMOVED] ||
70 QUERY_FLAG (npc->enemy, FLAG_FREED) || 71 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)) 72 !on_same_map (npc, npc->enemy) || npc == npc->enemy || npc->flag [FLAG_NEUTRAL] || npc->enemy->flag [FLAG_NEUTRAL])
72 npc->enemy = NULL; 73 npc->enemy = 0;
73 74
74 else if (QUERY_FLAG (npc, FLAG_FRIENDLY) && ((QUERY_FLAG (npc->enemy, FLAG_FRIENDLY) 75 else if (npc->flag [FLAG_FRIENDLY] && ((npc->enemy->flag [FLAG_FRIENDLY]
75 && !(should_arena_attack (npc, npc->owner, npc->enemy))) 76 && !(should_arena_attack (npc, npc->owner, npc->enemy)))
76 || ((npc->enemy->type == PLAYER) && !(should_arena_attack (npc, npc->owner, npc->enemy))) 77 || ((npc->enemy->type == PLAYER) && !(should_arena_attack (npc, npc->owner, npc->enemy)))
77 || npc->enemy == npc->owner)) 78 || npc->enemy == npc->owner))
78 npc->enemy = NULL; 79 npc->enemy = 0;
79 80
80 81
81 else if (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (npc->enemy, FLAG_FRIENDLY) && npc->enemy->type != PLAYER)) 82 else if (!npc->flag [FLAG_FRIENDLY] && (!npc->enemy->flag [FLAG_FRIENDLY] && npc->enemy->type != PLAYER))
82 npc->enemy = NULL; 83 npc->enemy = 0;
83 84
84 /* I've noticed that pets could sometimes get an arrow as the 85 /* I've noticed that pets could sometimes get an arrow as the
85 * target enemy - this code below makes sure the enemy is something 86 * target enemy - this code below makes sure the enemy is something
86 * that should be attacked. My guess is that the arrow hits 87 * that should be attacked. My guess is that the arrow hits
87 * the creature/owner, and so the creature then takes that 88 * the creature/owner, and so the creature then takes that
88 * as the enemy to attack. 89 * as the enemy to attack.
89 */ 90 */
90 else if (!QUERY_FLAG (npc->enemy, FLAG_MONSTER) 91 else if (!npc->enemy->flag [FLAG_MONSTER]
91 && !QUERY_FLAG (npc->enemy, FLAG_GENERATOR) 92 && !npc->enemy->flag [FLAG_GENERATOR]
92 && npc->enemy->type != PLAYER 93 && npc->enemy->type != PLAYER
93 && npc->enemy->type != GOLEM) 94 && npc->enemy->type != GOLEM)
94 npc->enemy = NULL; 95 npc->enemy = 0;
95
96 } 96 }
97
97 return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : NULL; 98 return can_detect_enemy (npc, npc->enemy, rv) ? npc->enemy : 0;
98} 99}
99 100
100/* Returns the nearest living creature (monster or generator). 101/* Returns the nearest living creature (monster or generator).
101 * Modified to deal with tiled maps properly. 102 * Modified to deal with tiled maps properly.
102 * Also fixed logic so that monsters in the lower directions were more 103 * Also fixed logic so that monsters in the lower directions were more
… …
152 * Currently, only move_monster calls this function. 153 * Currently, only move_monster calls this function.
153 * Fix function so that we always make calls to get_rangevector 154 * Fix function so that we always make calls to get_rangevector
154 * if we have a valid target - function as not doing so in 155 * if we have a valid target - function as not doing so in
155 * many cases. 156 * many cases.
156 */ 157 */
157object * 158static object *
158find_enemy (object *npc, rv_vector * rv) 159find_enemy (object *npc, rv_vector * rv)
159{ 160{
160 object *attacker, *tmp = NULL; 161 object *attacker, *tmp = NULL;
161 162
162 attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */ 163 attacker = npc->attacked_by; /* save this for later use. This can be a attacker. */
163 npc->attacked_by = 0; /* always clear the attacker entry */ 164 npc->attacked_by = 0; /* always clear the attacker entry */
164 165
165 /* if we berserk, we don't care about others - we attack all we can find */ 166 /* if we berserk, we don't care about others - we attack all we can find */
166 if (QUERY_FLAG (npc, FLAG_BERSERK)) 167 if (npc->flag [FLAG_BERSERK])
167 { 168 {
168 tmp = find_nearest_living_creature (npc); 169 tmp = find_nearest_living_creature (npc);
169 170
170 if (tmp) 171 if (tmp)
171 get_rangevector (npc, tmp, rv, 0); 172 get_rangevector (npc, tmp, rv, 0);
173
172 return tmp; 174 return tmp;
173 } 175 }
174 176
175 /* Here is the main enemy selection. 177 /* Here is the main enemy selection.
176 * We want this: if there is an enemy, attack him until its not possible or 178 * We want this: if there is an enemy, attack him until its not possible or
… …
196 /* we check our old enemy. */ 198 /* we check our old enemy. */
197 if (!(tmp = check_enemy (npc, rv))) 199 if (!(tmp = check_enemy (npc, rv)))
198 { 200 {
199 if (attacker) /* if we have an attacker, check him */ 201 if (attacker) /* if we have an attacker, check him */
200 { 202 {
201 /* TODO: thats not finished */ 203 /* TODO: that's not finished */
202 /* we don't want a fight evil vs evil or good against non evil */ 204 /* we don't want a fight evil vs evil or good against non evil */
203 205
204 if (QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (attacker, FLAG_NEUTRAL) || /* neutral */ 206 if (npc->flag [FLAG_NEUTRAL] || attacker->flag [FLAG_NEUTRAL] || /* neutral */
205 (QUERY_FLAG (npc, FLAG_FRIENDLY) && QUERY_FLAG (attacker, FLAG_FRIENDLY)) || 207 (npc->flag [FLAG_FRIENDLY] && attacker->flag [FLAG_FRIENDLY]) ||
206 (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (attacker, FLAG_FRIENDLY) && attacker->type != PLAYER))) 208 (!npc->flag [FLAG_FRIENDLY] && (!attacker->flag [FLAG_FRIENDLY] && attacker->type != PLAYER)))
207 CLEAR_FLAG (npc, FLAG_SLEEP); /* skip it, but lets wakeup */ 209 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... */ 210 else if (on_same_map (npc, attacker)) /* that's the only thing we must know... */
209 { 211 {
210 CLEAR_FLAG (npc, FLAG_SLEEP); /* well, NOW we really should wake up! */ 212 npc->clr_flag (FLAG_SLEEP); /* well, NOW we really should wake up! */
211 npc->enemy = attacker; 213 npc->enemy = attacker;
212 return attacker; /* yes, we face our attacker! */ 214 return attacker; /* yes, we face our attacker! */
213 } 215 }
214 } 216 }
215 217
216 /* we have no legal enemy or attacker, so we try to target a new one */ 218 /* we have no legal enemy or attacker, so we try to target a new one */
217 if (!QUERY_FLAG (npc, FLAG_UNAGGRESSIVE) && !QUERY_FLAG (npc, FLAG_FRIENDLY) && !QUERY_FLAG (npc, FLAG_NEUTRAL)) 219 if (!npc->flag [FLAG_UNAGGRESSIVE] && !npc->flag [FLAG_FRIENDLY] && !npc->flag [FLAG_NEUTRAL])
218 { 220 {
219 npc->enemy = get_nearest_player (npc); 221 npc->enemy = get_nearest_player (npc);
220 if (npc->enemy) 222 if (npc->enemy)
221 tmp = check_enemy (npc, rv); 223 tmp = check_enemy (npc, rv);
222 } 224 }
… …
229/* Sees if this monster should wake up. 231/* Sees if this monster should wake up.
230 * Currently, this is only called from move_monster, and 232 * Currently, this is only called from move_monster, and
231 * if enemy is set, then so should be rv. 233 * if enemy is set, then so should be rv.
232 * returns 1 if the monster should wake up, 0 otherwise. 234 * returns 1 if the monster should wake up, 0 otherwise.
233 */ 235 */
234int 236static int
235check_wakeup (object *op, object *enemy, rv_vector * rv) 237check_wakeup (object *op, object *enemy, rv_vector *rv)
236{ 238{
237 int radius = op->stats.Wis > MIN_MON_RADIUS ? op->stats.Wis : MIN_MON_RADIUS;
238
239 /* Trim work - if no enemy, no need to do anything below */ 239 /* Trim work - if no enemy, no need to do anything below */
240 if (!enemy) 240 if (!enemy)
241 return 0; 241 return 0;
242 242
243 if (!op->flag [FLAG_SLEEP])
244 return 1;
245
246 int radius = max (op->stats.Wis, MIN_MON_RADIUS);
247
248 if (op->flag [FLAG_BLIND])
243 /* blinded monsters can only find nearby objects to attack */ 249 /* blinded monsters can only find nearby objects to attack */
244 if (QUERY_FLAG (op, FLAG_BLIND))
245 radius = MIN_MON_RADIUS; 250 radius = MIN_MON_RADIUS;
246 251 else if (op->map
252 && !enemy->invisible
253 && !stand_in_light (enemy)
254 && (!op->flag[FLAG_SEE_IN_DARK] || !op->flag [FLAG_SEE_INVISIBLE]))
247 /* This covers the situation where the monster is in the dark 255 /* This covers the situation where the monster is in the dark
248 * and has an enemy. If the enemy has no carried light (or isnt 256 * and has an enemy. If the enemy has no carried light (or isnt
249 * glowing!) then the monster has trouble finding the enemy. 257 * glowing!) then the monster has trouble finding the enemy.
250 * Remember we already checked to see if the monster can see in 258 * Remember we already checked to see if the monster can see in
251 * the dark. */ 259 * the dark. */
260 radius = min (radius, MIN_MON_RADIUS + MAX_DARKNESS - op->map->darklevel ());
252 261
253 else if (op->map && op->map->darkness > 0 && enemy && !enemy->invisible && 262 if (enemy->flag [FLAG_STEALTH])
254 !stand_in_light (enemy) && (!QUERY_FLAG (op, FLAG_SEE_IN_DARK) || !QUERY_FLAG (op, FLAG_SEE_INVISIBLE))) 263 radius = radius / 2 + 1;
255 {
256 int dark = radius / (op->map->darkness);
257
258 radius = (dark > MIN_MON_RADIUS) ? (dark + 1) : MIN_MON_RADIUS;
259 }
260 else if (!QUERY_FLAG (op, FLAG_SLEEP))
261 return 1;
262 264
263 /* enemy should already be on this map, so don't really need to check 265 /* enemy should already be on this map, so don't really need to check
264 * for that. 266 * for that.
265 */ 267 */
266 if (rv->distance < (unsigned int) (QUERY_FLAG (enemy, FLAG_STEALTH) ? (radius / 2) + 1 : radius)) 268 if (rv->distance <= radius)
267 { 269 {
268 CLEAR_FLAG (op, FLAG_SLEEP); 270 op->clr_flag (FLAG_SLEEP);
269 return 1; 271 return 1;
270 } 272 }
273
271 return 0; 274 return 0;
272} 275}
273 276
274int 277static int
275move_randomly (object *op) 278move_randomly (object *op)
276{ 279{
280 /* Give up to 15 chances for a monster to move randomly */
281 for (int i = 0; i < 15; i++)
282 if (op->move (rndm (8) + 1))
283 return 1;
284
285 return 0;
286}
287
288/*
289 * monster_can_pick(): If the monster is interested in picking up
290 * the item, then return 0. Otherwise 0.
291 * Instead of pick_up, flags for "greed", etc, should be used.
292 * I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
293 */
294static int
295monster_can_pick (object *monster, object *item)
296{
297 int flag = 0;
277 int i; 298 int i;
278 299
279 /* Give up to 15 chances for a monster to move randomly */ 300 if (!can_pick (monster, item))
280 for (i = 0; i < 15; i++) 301 return 0;
302
303 if (item->flag [FLAG_UNPAID])
304 return 0;
305
306 if (monster->pick_up & 64) /* All */
307 flag = 1;
308
309 else
310 switch (item->type)
281 { 311 {
282 if (move_object (op, rndm (8) + 1)) 312 case MONEY:
313 case GEM:
314 flag = monster->pick_up & 2;
315 break;
316
317 case FOOD:
318 flag = monster->pick_up & 4;
319 break;
320
321 case WEAPON:
322 flag = (monster->pick_up & 8) || monster->flag [FLAG_USE_WEAPON];
323 break;
324
325 case ARMOUR:
326 case SHIELD:
327 case HELMET:
328 case BOOTS:
329 case GLOVES:
330 case GIRDLE:
331 flag = (monster->pick_up & 16) || monster->flag [FLAG_USE_ARMOUR];
332 break;
333
334 case SKILL:
335 flag = monster->flag [FLAG_CAN_USE_SKILL];
336 break;
337
338 case RING:
339 flag = monster->flag [FLAG_USE_RING];
340 break;
341
342 case RANGED:
343 case WAND:
344 case HORN:
345 case ROD:
346 flag = monster->flag [FLAG_USE_RANGE];
347 break;
348
349 case SPELLBOOK:
350 flag = monster->arch && monster->arch->flag [FLAG_CAST_SPELL];
351 break;
352
353 case SCROLL:
354 flag = monster->flag [FLAG_USE_SCROLL];
355 break;
356
357 case BOW:
358 case ARROW:
359 flag = monster->flag [FLAG_USE_BOW];
360 break;
361 }
362
363 /* Simplistic check - if the monster has a location to equip it, he will
364 * pick it up. Note that this doesn't handle cases where an item may
365 * use several locations.
366 */
367 for (i = 0; i < NUM_BODY_LOCATIONS; i++)
368 {
369 if (monster->slot[i].info && item->slot[i].info)
370 {
371 flag = 1;
372 break;
373 }
374 }
375
376 if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
283 return 1; 377 return 1;
284 } 378
285 return 0; 379 return 0;
286} 380}
287 381
288/* 382/*
289 * Move-monster returns 1 if the object has been freed, otherwise 0. 383 * monster_check_pickup(): checks for items that monster can pick up.
384 *
385 * Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
386 * Each time the blob passes over some treasure, it will
387 * grab it a.s.a.p.
388 *
389 * Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
390 * to handle this.
391 *
392 * This function was seen be continueing looping at one point (tmp->below
393 * became a recursive loop. It may be better to call monster_check_apply
394 * after we pick everything up, since that function may call others which
395 * affect stacking on this space.
290 */ 396 */
291int 397static void
292move_monster (object *op) 398monster_check_pickup (object *monster)
293{ 399{
294 int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */ 400 object *tmp, *next;
295 object *owner, *enemy, *part, *oph = op;
296 rv_vector rv;
297 401
298 /* Monsters not on maps don't do anything. These monsters are things 402 for (tmp = monster->below; tmp != NULL; tmp = next)
299 * Like royal guards in city dwellers inventories.
300 */
301 if (!op->map)
302 return 0;
303
304 /* for target facing, we copy this value here for fast access */
305 if (oph->head) /* force update the head - one arch one pic */
306 oph = oph->head;
307
308 if (QUERY_FLAG (op, FLAG_NO_ATTACK)) /* we never ever attack */
309 enemy = op->enemy = NULL;
310 else if ((enemy = find_enemy (op, &rv)))
311 /* we have an enemy, just tell him we want him dead */
312 enemy->attacked_by = op; /* our ptr */
313
314 /* generate hp, if applicable */
315 if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
316 { 403 {
317 404 next = tmp->below;
318 /* last heal is in funny units. Dividing by speed puts 405 if (monster_can_pick (monster, tmp))
319 * the regeneration rate on a basis of time instead of
320 * #moves the monster makes. The scaling by 8 is
321 * to capture 8th's of a hp fraction regens
322 * 406 {
323 * Cast to sint32 before comparing to maxhp since otherwise an (sint16) 407 tmp->remove ();
324 * 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.
325 */ 414 */
326 415 if (next && next->destroyed ())
327 op->last_heal += (int) ((float) (8 * op->stats.Con) / FABS (op->speed));
328 op->stats.hp = MIN ((sint32) op->stats.hp + op->last_heal / 32, op->stats.maxhp); /* causes Con/4 hp/tick */
329 op->last_heal %= 32;
330
331 /* So if the monster has gained enough HP that they are no longer afraid */
332 if (QUERY_FLAG (op, FLAG_RUN_AWAY) && op->stats.hp >= (signed short) (((float) op->run_away / (float) 100) * (float) op->stats.maxhp))
333 CLEAR_FLAG (op, FLAG_RUN_AWAY);
334
335 if (op->stats.hp > op->stats.maxhp)
336 op->stats.hp = op->stats.maxhp;
337 }
338
339 /* generate sp, if applicable */
340 if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
341 {
342
343 /* last_sp is in funny units. Dividing by speed puts
344 * the regeneration rate on a basis of time instead of
345 * #moves the monster makes. The scaling by 8 is
346 * to capture 8th's of a sp fraction regens
347 *
348 * Cast to sint32 before comparing to maxhp since otherwise an (sint16)
349 * overflow might produce monsters with negative sp.
350 */
351
352 op->last_sp += (int) ((float) (8 * op->stats.Pow) / FABS (op->speed));
353 op->stats.sp = MIN (op->stats.sp + op->last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
354 op->last_sp %= 128;
355 }
356
357 /* this should probably get modified by many more values.
358 * (eg, creatures resistance to fear, level, etc. )
359 */
360 if (QUERY_FLAG (op, FLAG_SCARED) && !(rndm (20)))
361 {
362 CLEAR_FLAG (op, FLAG_SCARED); /* Time to regain some "guts"... */
363 }
364
365 if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
366 return QUERY_FLAG (op, FLAG_FREED);
367
368 if (QUERY_FLAG (op, FLAG_SLEEP) || QUERY_FLAG (op, FLAG_BLIND) ||
369 ((op->map->darkness > 0) && !QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
370 {
371 if (!check_wakeup (op, enemy, &rv))
372 return 0; 416 return;
373 }
374
375 /* check if monster pops out of hidden spot */
376 if (op->hide)
377 do_hidden_move (op);
378
379 if (op->pick_up)
380 monster_check_pickup (op);
381
382 if (op->will_apply)
383 monster_apply_below (op); /* Check for items to apply below */
384
385 /* If we don't have an enemy, do special movement or the like */
386 if (!enemy)
387 { 417 }
388 if (QUERY_FLAG (op, FLAG_ONLY_ATTACK)) 418}
389 { 419
390 op->destroy (); 420/*
391 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)
392 } 435 {
393 436 case T_HANDLE:
394 /* Probably really a bug for a creature to have both
395 * stand still and a movement type set.
396 */
397 if (!QUERY_FLAG (op, FLAG_STAND_STILL))
398 {
399 if (op->attack_movement & HI4)
400 {
401 switch (op->attack_movement & HI4)
402 {
403 case (PETMOVE):
404 pet_move (op);
405 break;
406
407 case (CIRCLE1):
408 circ1_move (op);
409 break;
410
411 case (CIRCLE2):
412 circ2_move (op);
413 break;
414
415 case (PACEV):
416 pace_movev (op);
417 break;
418
419 case (PACEH):
420 pace_moveh (op);
421 break;
422
423 case (PACEV2):
424 pace2_movev (op);
425 break;
426
427 case (PACEH2):
428 pace2_moveh (op);
429 break;
430
431 case (RANDO):
432 rand_move (op);
433 break;
434
435 case (RANDO2):
436 move_randomly (op);
437 break;
438 }
439 return 0;
440 }
441 else if (QUERY_FLAG (op, FLAG_RANDOM_MOVE))
442 (void) move_randomly (op);
443
444 } /* stand still */
445 return 0;
446 } /* no enemy */
447
448 /* We have an enemy. Block immediately below is for pets */
449 if ((op->attack_movement & HI4) == PETMOVE
450 && (owner = op->owner) != NULL
451 && !on_same_map (op, owner)
452 && !owner->flag [FLAG_REMOVED])
453 return follow_owner (op, owner);
454
455 /* doppleganger code to change monster facing to that of the nearest
456 * player. Hmm. The code is here, but no monster in the current
457 * arch set uses it.
458 */
459 if ((op->race != NULL) && strcmp (op->race, "doppleganger") == 0)
460 {
461 op->face = enemy->face;
462 op->name = enemy->name;
463 }
464
465 /* Calculate range information for closest body part - this
466 * is used for the 'skill' code, which isn't that smart when
467 * it comes to figuring it out - otherwise, giants throw boulders
468 * into themselves.
469 */
470 get_rangevector (op, enemy, &rv, 0);
471
472 /* Move the check for scared up here - if the monster was scared,
473 * we were not doing any of the logic below, so might as well save
474 * a few cpu cycles.
475 */
476 if (!QUERY_FLAG (op, FLAG_SCARED))
477 {
478 rv_vector rv1;
479
480 /* now we test every part of an object .... this is a real ugly piece of code */
481 for (part = op; part; part = part->more)
482 {
483 get_rangevector (part, enemy, &rv1, 0x1);
484 dir = rv1.direction;
485
486 /* hm, not sure about this part - in original was a scared flag here too
487 * but that we test above... so can be old code here
488 */
489 if (QUERY_FLAG (op, FLAG_RUN_AWAY))
490 dir = absdir (dir + 4);
491
492 if (QUERY_FLAG (op, FLAG_CONFUSED))
493 dir = absdir (dir + rndm (3) + rndm (3) - 2);
494
495 if (QUERY_FLAG (op, FLAG_CAST_SPELL) && !(rndm (3)))
496 if (monster_cast_spell (op, part, enemy, dir, &rv1))
497 return 0;
498
499 if (QUERY_FLAG (op, FLAG_READY_SCROLL) && !(rndm (3)))
500 if (monster_use_scroll (op, part, enemy, dir, &rv1))
501 return 0;
502
503 if (QUERY_FLAG (op, FLAG_READY_RANGE) && !(rndm (3)))
504 if (monster_use_range (op, part, enemy, dir))
505 return 0;
506
507 if (QUERY_FLAG (op, FLAG_READY_SKILL) && !(rndm (3)))
508 if (monster_use_skill (op, rv.part, enemy, rv.direction))
509 return 0;
510
511 if (QUERY_FLAG (op, FLAG_READY_BOW) && !(rndm (2)))
512 if (monster_use_bow (op, part, enemy, dir))
513 return 0;
514 } /* for processing of all parts */
515 } /* If not scared */
516
517
518 part = rv.part;
519 dir = rv.direction;
520
521 if (QUERY_FLAG (op, FLAG_SCARED) || QUERY_FLAG (op, FLAG_RUN_AWAY))
522 dir = absdir (dir + 4);
523
524 if (QUERY_FLAG (op, FLAG_CONFUSED))
525 dir = absdir (dir + rndm (3) + rndm (3) - 2);
526
527 pre_att_dir = dir; /* remember the original direction */
528
529 if ((op->attack_movement & LO4) && !QUERY_FLAG (op, FLAG_SCARED))
530 {
531 switch (op->attack_movement & LO4)
532 {
533 case DISTATT: 437 case TRIGGER:
534 dir = dist_att (dir, op, enemy, part, &rv); 438 if (monster->will_apply & 1)
439 monster->apply (tmp);
535 break; 440 break;
536 441
537 case RUNATT: 442 case TREASURE:
538 dir = run_att (dir, op, enemy, part, &rv); 443 if (monster->will_apply & 2)
444 monster->apply (tmp);
539 break; 445 break;
540 446
541 case HITRUN:
542 dir = hitrun_att (dir, op, enemy);
543 break;
544
545 case WAITATT:
546 dir = wait_att (dir, op, enemy, part, &rv);
547 break;
548
549 case RUSH: /* default - monster normally moves towards player */
550 case ALLRUN:
551 break;
552
553 case DISTHIT:
554 dir = disthit_att (dir, op, enemy, part, &rv);
555 break;
556
557 case WAIT2:
558 dir = wait_att2 (dir, op, enemy, part, &rv);
559 break;
560
561 default:
562 LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
563 }
564 }
565
566 if (!dir)
567 return 0;
568
569 if (!QUERY_FLAG (op, FLAG_STAND_STILL))
570 {
571 if (move_object (op, dir)) /* Can the monster move directly toward player? */
572 { 447 }
573 /* elmex: Turn our monster after it moved if it has DISTATT attack */ 448 if (tmp->flag [FLAG_IS_FLOOR])
574 if ((op->attack_movement & LO4) == DISTATT) 449 break;
575 op->direction = pre_att_dir;
576
577 return 0;
578 }
579
580 if (QUERY_FLAG (op, FLAG_SCARED) || !can_hit (part, enemy, &rv) || QUERY_FLAG (op, FLAG_RUN_AWAY))
581 {
582
583 /* Try move around corners if !close */
584 int maxdiff = (QUERY_FLAG (op, FLAG_ONLY_ATTACK) || RANDOM () & 1) ? 1 : 2;
585
586 for (diff = 1; diff <= maxdiff; diff++)
587 {
588 /* try different detours */
589 int m = 1 - (RANDOM () & 2); /* Try left or right first? */
590
591 if (move_object (op, absdir (dir + diff * m)) || move_object (op, absdir (dir - diff * m)))
592 return 0;
593 }
594 }
595 } /* if monster is not standing still */
596
597 /* elmex: Turn our monster after it moved if it has DISTATT attack */
598 if ((op->attack_movement & LO4) == DISTATT)
599 op->direction = pre_att_dir;
600
601 /*
602 * Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
603 * direction if they can't move away.
604 */
605 if (!QUERY_FLAG (op, FLAG_ONLY_ATTACK) && (QUERY_FLAG (op, FLAG_RUN_AWAY) || QUERY_FLAG (op, FLAG_SCARED)))
606 if (move_randomly (op))
607 return 0;
608
609 /*
610 * Try giving the monster a new enemy - the player that is closest
611 * to it. In this way, it won't just keep trying to get to a target
612 * that is inaccessible.
613 * This could be more clever - it should go through a list of several
614 * enemies, as it is now, you could perhaps get situations where there
615 * are two players flanking the monster at close distance, but which
616 * the monster can't get to, and a third one at a far distance that
617 * the monster could get to - as it is, the monster won't look at that
618 * third one.
619 */
620 if (!QUERY_FLAG (op, FLAG_FRIENDLY) && enemy == op->enemy)
621 { 450 }
622 object *nearest_player = get_nearest_player (op);
623
624 if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
625 {
626 op->enemy = NULL;
627 enemy = nearest_player;
628 }
629 }
630
631 if (!QUERY_FLAG (op, FLAG_SCARED) && can_hit (part, enemy, &rv))
632 {
633 /* The adjustement to wc that was here before looked totally bogus -
634 * since wc can in fact get negative, that would mean by adding
635 * the current wc, the creature gets better? Instead, just
636 * add a fixed amount - nasty creatures that are runny away should
637 * still be pretty nasty.
638 */
639 if (QUERY_FLAG (op, FLAG_RUN_AWAY))
640 {
641 part->stats.wc += 10;
642 (void) skill_attack (enemy, part, 0, NULL, NULL);
643 part->stats.wc -= 10;
644 }
645 else
646 (void) skill_attack (enemy, part, 0, NULL, NULL);
647 } /* if monster is in attack range */
648
649 if (QUERY_FLAG (part, FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
650 return 1;
651
652 if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
653 {
654 op->remove ();
655 op->destroy ();
656 return 1;
657 }
658 return 0;
659}
660
661int
662can_hit (object *ob1, object *ob2, rv_vector * rv)
663{
664 object *more;
665 rv_vector rv1;
666
667 if (QUERY_FLAG (ob1, FLAG_CONFUSED) && !(rndm (3)))
668 return 0;
669
670 if (abs (rv->distance_x) < 2 && abs (rv->distance_y) < 2)
671 return 1;
672
673 /* check all the parts of ob2 - just because we can't get to
674 * its head doesn't mean we don't want to pound its feet
675 */
676 for (more = ob2->more; more != NULL; more = more->more)
677 {
678 get_rangevector (ob1, more, &rv1, 0);
679 if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
680 return 1;
681 }
682 return 0;
683
684} 451}
685 452
686/* Returns 1 is monster should cast spell sp at an enemy 453/* Returns 1 is monster should cast spell sp at an enemy
687 * Returns 0 if the monster should not cast this spell. 454 * Returns 0 if the monster should not cast this spell.
688 * 455 *
… …
696 * 463 *
697 * 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,
698 * 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,
699 * the right type of healing spell could be useful. 466 * the right type of healing spell could be useful.
700 */ 467 */
701
702static int 468static int
703monster_should_cast_spell (object *monster, object *spell_ob) 469monster_should_cast_spell (object *monster, object *spell_ob)
704{ 470{
705 if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET || 471 if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||
706 spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE || 472 spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||
707 spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE || 473 spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||
708 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 ||
709 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 ||
710 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)
711
712 return 1; 477 return 1;
713 478
714 return 0; 479 return 0;
715}
716
717
718#define MAX_KNOWN_SPELLS 20
719
720/* Returns a randomly selected spell. This logic is still
721 * less than ideal. This code also only seems to deal with
722 * wizard spells, as the check is against sp, and not grace.
723 * can mosnters know cleric spells?
724 */
725object *
726monster_choose_random_spell (object *monster)
727{
728 object *altern[MAX_KNOWN_SPELLS];
729 object *tmp;
730 int i = 0;
731
732 for (tmp = monster->inv; tmp != NULL; tmp = tmp->below)
733 if (tmp->type == SPELLBOOK || tmp->type == SPELL)
734 {
735 /* Check and see if it's actually a useful spell.
736 * If its a spellbook, the spell is actually the inventory item.
737 * if it is a spell, then it is just the object itself.
738 */
739 if (monster_should_cast_spell (monster, (tmp->type == SPELLBOOK) ? tmp->inv : tmp))
740 {
741 altern[i++] = tmp;
742 if (i == MAX_KNOWN_SPELLS)
743 break;
744 }
745 }
746 if (!i)
747 return NULL;
748 return altern[RANDOM () % i];
749}
750
751/* This checks to see if the monster should cast a spell/ability.
752 * it returns true if the monster casts a spell, 0 if he doesn't.
753 * head is the head of the monster.
754 * part is the part of the monster we are checking against.
755 * pl is the target.
756 * dir is the direction to case.
757 * rv is the vector which describes where the enemy is.
758 */
759
760int
761monster_cast_spell (object *head, object *part, object *pl, int dir, rv_vector * rv)
762{
763 object *spell_item;
764 object *owner;
765 rv_vector rv1;
766
767 /* If you want monsters to cast spells over friends, this spell should
768 * be removed. It probably should be in most cases, since monsters still
769 * don't care about residual effects (ie, casting a cone which may have a
770 * clear path to the player, the side aspects of the code will still hit
771 * other monsters)
772 */
773 if (!(dir = path_to_player (part, pl, 0)))
774 return 0;
775
776 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
777 {
778 get_rangevector (head, owner, &rv1, 0x1);
779 if (dirdiff (dir, rv1.direction) < 2)
780 {
781 return 0; /* Might hit owner with spell */
782 }
783 }
784
785 if (QUERY_FLAG (head, FLAG_CONFUSED))
786 dir = absdir (dir + rndm (3) + rndm (3) - 2);
787
788 /* If the monster hasn't already chosen a spell, choose one
789 * I'm not sure if it really make sense to pre-select spells (events
790 * could be different by the time the monster goes again).
791 */
792 if (head->spellitem == NULL)
793 {
794 if ((spell_item = monster_choose_random_spell (head)) == NULL)
795 {
796 LOG (llevMonster, "Turned off spells in %s\n", &head->name);
797 CLEAR_FLAG (head, FLAG_CAST_SPELL); /* Will be turned on when picking up book */
798 return 0;
799 }
800 if (spell_item->type == SPELLBOOK)
801 {
802 if (!spell_item->inv)
803 {
804 LOG (llevError, "spellbook %s does not contain a spell?\n", &spell_item->name);
805 return 0;
806 }
807 spell_item = spell_item->inv;
808 }
809 }
810 else
811 spell_item = head->spellitem;
812
813 if (!spell_item)
814 return 0;
815
816 /* Best guess this is a defensive/healing spell */
817 if (spell_item->range <= 1 || spell_item->stats.dam < 0)
818 dir = 0;
819
820 /* Monster doesn't have enough spell-points */
821 if (head->stats.sp < SP_level_spellpoint_cost (head, spell_item, SPELL_MANA))
822 return 0;
823
824 if (head->stats.grace < SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE))
825 return 0;
826
827 head->stats.sp -= SP_level_spellpoint_cost (head, spell_item, SPELL_MANA);
828 head->stats.grace -= SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE);
829
830 /* set this to null, so next time monster will choose something different */
831 head->spellitem = NULL;
832
833 return cast_spell (part, part, dir, spell_item, NULL);
834}
835
836
837int
838monster_use_scroll (object *head, object *part, object *pl, int dir, rv_vector * rv)
839{
840 object *scroll;
841 object *owner;
842 rv_vector rv1;
843
844 /* If you want monsters to cast spells over friends, this spell should
845 * be removed. It probably should be in most cases, since monsters still
846 * don't care about residual effects (ie, casting a cone which may have a
847 * clear path to the player, the side aspects of the code will still hit
848 * other monsters)
849 */
850 if (!(dir = path_to_player (part, pl, 0)))
851 return 0;
852
853 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
854 {
855 get_rangevector (head, owner, &rv1, 0x1);
856 if (dirdiff (dir, rv1.direction) < 2)
857 {
858 return 0; /* Might hit owner with spell */
859 }
860 }
861
862 if (QUERY_FLAG (head, FLAG_CONFUSED))
863 dir = absdir (dir + rndm (3) + rndm (3) - 2);
864
865 for (scroll = head->inv; scroll; scroll = scroll->below)
866 if (scroll->type == SCROLL && monster_should_cast_spell (head, scroll->inv))
867 break;
868
869 /* Used up all his scrolls, so nothing do to */
870 if (!scroll)
871 {
872 CLEAR_FLAG (head, FLAG_READY_SCROLL);
873 return 0;
874 }
875
876 /* Spell should be cast on caster (ie, heal, strength) */
877 if (scroll->inv->range == 0)
878 dir = 0;
879
880 apply_scroll (part, scroll, dir);
881 return 1;
882}
883
884/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.
885 * Note that monsters do not need the skills SK_MELEE_WEAPON and
886 * SK_MISSILE_WEAPON to make those respective attacks, if we
887 * required that we would drastically increase the memory
888 * requirements of CF!!
889 *
890 * The skills we are treating here are all but those. -b.t.
891 *
892 * At the moment this is only useful for throwing, perhaps for
893 * stealing. TODO: This should be more integrated in the game. -MT, 25.11.01
894 */
895int
896monster_use_skill (object *head, object *part, object *pl, int dir)
897{
898 object *skill, *owner;
899
900 if (!(dir = path_to_player (part, pl, 0)))
901 return 0;
902
903 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
904 {
905 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
906
907 if (dirdiff (dir, dir2) < 1)
908 return 0; /* Might hit owner with skill -thrown rocks for example ? */
909 }
910
911 if (QUERY_FLAG (head, FLAG_CONFUSED))
912 dir = absdir (dir + rndm (3) + rndm (3) - 2);
913
914 /* skill selection - monster will use the next unused skill.
915 * well...the following scenario will allow the monster to
916 * toggle between 2 skills. One day it would be nice to make
917 * more skills available to monsters.
918 */
919 for (skill = head->inv; skill; skill = skill->below)
920 if (skill->type == SKILL && skill != head->chosen_skill)
921 {
922 head->chosen_skill = skill;
923 break;
924 }
925
926 if (!skill && !head->chosen_skill)
927 {
928 LOG (llevDebug, "Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n", &head->name, head->count);
929 CLEAR_FLAG (head, FLAG_READY_SKILL);
930 return 0;
931 }
932
933 /* use skill */
934 return do_skill (head, part, head->chosen_skill, dir, NULL);
935}
936
937/* Monster will use a ranged spell attack. */
938int
939monster_use_range (object *head, object *part, object *pl, int dir)
940{
941 object *wand, *owner;
942 int at_least_one = 0;
943
944 if (!(dir = path_to_player (part, pl, 0)))
945 return 0;
946
947 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
948 {
949 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
950
951 if (dirdiff (dir, dir2) < 2)
952 return 0; /* Might hit owner with spell */
953 }
954
955 if (QUERY_FLAG (head, FLAG_CONFUSED))
956 dir = absdir (dir + rndm (3) + rndm (3) - 2);
957
958 for (wand = head->inv; wand; wand = wand->below)
959 {
960 if (wand->type == WAND)
961 {
962 /* Found a wand, let's see if it has charges left */
963 at_least_one = 1;
964 if (wand->stats.food <= 0)
965 continue;
966
967 cast_spell (head, wand, dir, wand->inv, NULL);
968
969 if (!(--wand->stats.food))
970 {
971 if (wand->arch)
972 {
973 CLEAR_FLAG (wand, FLAG_ANIMATE);
974 wand->face = wand->arch->face;
975 wand->set_speed (0);
976 }
977 }
978 /* Success */
979 return 1;
980 }
981 else if (wand->type == ROD || wand->type == HORN)
982 {
983 /* Found rod/horn, let's use it if possible */
984 at_least_one = 1;
985 if (wand->stats.hp < MAX (wand->inv->stats.sp, wand->inv->stats.grace))
986 continue;
987
988 /* drain charge before casting spell - can be a case where the
989 * spell destroys the monster, and rod, so if done after, results
990 * in crash.
991 */
992 drain_rod_charge (wand);
993 cast_spell (head, wand, dir, wand->inv, NULL);
994
995 /* Success */
996 return 1;
997 }
998 }
999
1000 if (at_least_one)
1001 return 0;
1002
1003 LOG (llevError, "Error: Monster %s (%d) HAS_READY_RANGE() without wand/horn/rod.\n", &head->name, head->count);
1004 CLEAR_FLAG (head, FLAG_READY_RANGE);
1005 return 0;
1006}
1007
1008int
1009monster_use_bow (object *head, object *part, object *pl, int dir)
1010{
1011 object *owner;
1012
1013 if (!(dir = path_to_player (part, pl, 0)))
1014 return 0;
1015
1016 if (QUERY_FLAG (head, FLAG_CONFUSED))
1017 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1018
1019 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
1020 {
1021 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
1022
1023 if (dirdiff (dir, dir2) < 1)
1024 return 0; /* Might hit owner with arrow */
1025 }
1026
1027 /* in server/player.c */
1028 return fire_bow (head, part, NULL, dir, 0, part->x, part->y);
1029
1030} 480}
1031 481
1032/* Checks if putting on 'item' will make 'who' do more 482/* Checks if putting on 'item' will make 'who' do more
1033 * damage. This is a very simplistic check - also checking things 483 * damage. This is a very simplistic check - also checking things
1034 * like speed and ac are also relevant. 484 * like speed and ac are also relevant.
1035 * 485 *
1036 * return true if item is a better object. 486 * return true if item is a better object.
1037 */ 487 */
1038int 488static int
1039check_good_weapon (object *who, object *item) 489check_good_weapon (object *who, object *item)
1040{ 490{
1041 object *other_weap; 491 object *other_weap;
1042 int val = 0, i; 492 int val = 0, i;
1043 493
1044 for (other_weap = who->inv; other_weap; other_weap = other_weap->below) 494 for (other_weap = who->inv; other_weap; other_weap = other_weap->below)
1045 if (other_weap->type == item->type && QUERY_FLAG (other_weap, FLAG_APPLIED)) 495 if (other_weap->type == item->type && other_weap->flag [FLAG_APPLIED])
1046 break; 496 break;
1047 497
1048 if (!other_weap) /* No other weapons */ 498 if (!other_weap) /* No other weapons */
1049 return 1; 499 return 1;
1050 500
… …
1066 return 1; 516 return 1;
1067 else 517 else
1068 return 0; 518 return 0;
1069} 519}
1070 520
1071int 521static int
1072check_good_armour (object *who, object *item) 522check_good_armour (object *who, object *item)
1073{ 523{
1074 object *other_armour; 524 object *other_armour;
1075 int val = 0, i; 525 int val = 0, i;
1076 526
1077 for (other_armour = who->inv; other_armour; other_armour = other_armour->below) 527 for (other_armour = who->inv; other_armour; other_armour = other_armour->below)
1078 if (other_armour->type == item->type && QUERY_FLAG (other_armour, FLAG_APPLIED)) 528 if (other_armour->type == item->type && other_armour->flag [FLAG_APPLIED])
1079 break; 529 break;
1080 530
1081 if (other_armour == NULL) /* No other armour, use the new */ 531 if (other_armour == NULL) /* No other armour, use the new */
1082 return 1; 532 return 1;
1083 533
… …
1104 554
1105 if (val > 0) 555 if (val > 0)
1106 return 1; 556 return 1;
1107 else 557 else
1108 return 0; 558 return 0;
1109}
1110
1111/*
1112 * monster_check_pickup(): checks for items that monster can pick up.
1113 *
1114 * Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
1115 * Each time the blob passes over some treasure, it will
1116 * grab it a.s.a.p.
1117 *
1118 * Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
1119 * to handle this.
1120 *
1121 * This function was seen be continueing looping at one point (tmp->below
1122 * became a recursive loop. It may be better to call monster_check_apply
1123 * after we pick everything up, since that function may call others which
1124 * affect stacking on this space.
1125 */
1126void
1127monster_check_pickup (object *monster)
1128{
1129 object *tmp, *next;
1130
1131 for (tmp = monster->below; tmp != NULL; tmp = next)
1132 {
1133 next = tmp->below;
1134 if (monster_can_pick (monster, tmp))
1135 {
1136 tmp->remove ();
1137 tmp = insert_ob_in_ob (tmp, monster);
1138 (void) monster_check_apply (monster, tmp);
1139 }
1140 /* We could try to re-establish the cycling, of the space, but probably
1141 * not a big deal to just bail out.
1142 */
1143 if (next && next->destroyed ())
1144 return;
1145 }
1146}
1147
1148/*
1149 * monster_can_pick(): If the monster is interested in picking up
1150 * the item, then return 0. Otherwise 0.
1151 * Instead of pick_up, flags for "greed", etc, should be used.
1152 * I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
1153 */
1154int
1155monster_can_pick (object *monster, object *item)
1156{
1157 int flag = 0;
1158 int i;
1159
1160 if (!can_pick (monster, item))
1161 return 0;
1162
1163 if (QUERY_FLAG (item, FLAG_UNPAID))
1164 return 0;
1165
1166 if (monster->pick_up & 64) /* All */
1167 flag = 1;
1168
1169 else
1170 switch (item->type)
1171 {
1172 case MONEY:
1173 case GEM:
1174 flag = monster->pick_up & 2;
1175 break;
1176
1177 case FOOD:
1178 flag = monster->pick_up & 4;
1179 break;
1180
1181 case WEAPON:
1182 flag = (monster->pick_up & 8) || QUERY_FLAG (monster, FLAG_USE_WEAPON);
1183 break;
1184
1185 case ARMOUR:
1186 case SHIELD:
1187 case HELMET:
1188 case BOOTS:
1189 case GLOVES:
1190 case GIRDLE:
1191 flag = (monster->pick_up & 16) || QUERY_FLAG (monster, FLAG_USE_ARMOUR);
1192 break;
1193
1194 case SKILL:
1195 flag = QUERY_FLAG (monster, FLAG_CAN_USE_SKILL);
1196 break;
1197
1198 case RING:
1199 flag = QUERY_FLAG (monster, FLAG_USE_RING);
1200 break;
1201
1202 case WAND:
1203 case HORN:
1204 case ROD:
1205 flag = QUERY_FLAG (monster, FLAG_USE_RANGE);
1206 break;
1207
1208 case SPELLBOOK:
1209 flag = monster->arch && QUERY_FLAG (monster->arch, FLAG_CAST_SPELL);
1210 break;
1211
1212 case SCROLL:
1213 flag = QUERY_FLAG (monster, FLAG_USE_SCROLL);
1214 break;
1215
1216 case BOW:
1217 case ARROW:
1218 flag = QUERY_FLAG (monster, FLAG_USE_BOW);
1219 break;
1220 }
1221
1222 /* Simplistic check - if the monster has a location to equip it, he will
1223 * pick it up. Note that this doesn't handle cases where an item may
1224 * use several locations.
1225 */
1226 for (i = 0; i < NUM_BODY_LOCATIONS; i++)
1227 {
1228 if (monster->slot[i].info && item->slot[i].info)
1229 {
1230 flag = 1;
1231 break;
1232 }
1233 }
1234
1235 if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
1236 return 1;
1237 return 0;
1238}
1239
1240/*
1241 * monster_apply_below():
1242 * Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
1243 * eager to apply things, encounters something apply-able,
1244 * then make him apply it
1245 */
1246void
1247monster_apply_below (object *monster)
1248{
1249 object *tmp, *next;
1250
1251 for (tmp = monster->below; tmp != NULL; tmp = next)
1252 {
1253 next = tmp->below;
1254 switch (tmp->type)
1255 {
1256 case CF_HANDLE:
1257 case TRIGGER:
1258 if (monster->will_apply & 1)
1259 manual_apply (monster, tmp, 0);
1260 break;
1261
1262 case TREASURE:
1263 if (monster->will_apply & 2)
1264 manual_apply (monster, tmp, 0);
1265 break;
1266
1267 }
1268 if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
1269 break;
1270 }
1271} 559}
1272 560
1273/* 561/*
1274 * 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
1275 * inserted in a monster. 563 * inserted in a monster.
… …
1283void 571void
1284monster_check_apply (object *mon, object *item) 572monster_check_apply (object *mon, object *item)
1285{ 573{
1286 int flag = 0; 574 int flag = 0;
1287 575
1288 if (item->type == SPELLBOOK && mon->arch && (QUERY_FLAG (mon->arch, FLAG_CAST_SPELL))) 576 if (item->type == SPELLBOOK && mon->arch && (mon->arch->flag [FLAG_CAST_SPELL]))
1289 { 577 {
1290 SET_FLAG (mon, FLAG_CAST_SPELL); 578 mon->set_flag (FLAG_CAST_SPELL);
1291 return; 579 return;
1292 } 580 }
1293 581
1294 /* 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 */
1295 if (QUERY_FLAG (item, FLAG_APPLIED)) 583 if (item->flag [FLAG_APPLIED])
1296 return; 584 return;
1297 585
1298 /* 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,
1299 * 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
1300 * which case, it would be nice to have ammo for it. 588 * which case, it would be nice to have ammo for it.
1301 */ 589 */
1302 if (QUERY_FLAG (mon, FLAG_USE_BOW) && item->type == ARROW) 590 if (mon->flag [FLAG_USE_BOW] && item->type == ARROW)
1303 { 591 {
1304 /* Check for the right kind of bow */ 592 /* Check for the right kind of bow */
1305 object *bow; 593 object *bow;
1306 594
1307 for (bow = mon->inv; bow; bow = bow->below) 595 for (bow = mon->inv; bow; bow = bow->below)
1308 if (bow->type == BOW && bow->race == item->race) 596 if (bow->type == BOW && bow->race == item->race)
1309 { 597 {
1310 SET_FLAG (mon, FLAG_READY_BOW); 598 mon->set_flag (FLAG_READY_BOW);
1311 LOG (llevMonster, "Found correct bow for arrows.\n");
1312 return; /* nothing more to do for arrows */ 599 return; /* nothing more to do for arrows */
1313 } 600 }
1314 } 601 }
1315 602
1316 if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE) 603 if (item->type == TREASURE && mon->will_apply & WILL_APPLY_TREASURE)
1317 flag = 1; 604 flag = 1;
1318 /* Eating food gets hp back */ 605 /* Eating food gets hp back */
1319 else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD) 606 else if (item->type == FOOD && mon->will_apply & WILL_APPLY_FOOD)
1320 flag = 1; 607 flag = 1;
1321 else if (item->type == SCROLL && QUERY_FLAG (mon, FLAG_USE_SCROLL)) 608 else if (item->type == SCROLL && mon->flag [FLAG_USE_SCROLL])
1322 { 609 {
1323 if (!item->inv) 610 if (!item->inv)
1324 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);
1325 else if (monster_should_cast_spell (mon, item->inv)) 612 else if (monster_should_cast_spell (mon, item->inv))
1326 SET_FLAG (mon, FLAG_READY_SCROLL); 613 mon->set_flag (FLAG_READY_SCROLL);
1327 /* Don't use it right now */ 614 /* Don't use it right now */
1328 return; 615 return;
1329 } 616 }
1330 else if (item->type == WEAPON) 617 else if (item->type == WEAPON)
1331 flag = check_good_weapon (mon, item); 618 flag = check_good_weapon (mon, item);
… …
1339 /* 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
1340 * weapon would get undone. 627 * weapon would get undone.
1341 */ 628 */
1342 if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK)) 629 if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
1343 { 630 {
1344 SET_FLAG (mon, FLAG_READY_RANGE); 631 mon->set_flag (FLAG_READY_RANGE);
1345 SET_FLAG (item, FLAG_APPLIED); 632 item->set_flag (FLAG_APPLIED);
1346 } 633 }
1347 return; 634 return;
1348 } 635 }
1349 else if (item->type == BOW) 636 else if (item->type == BOW)
1350 { 637 {
1351 /* We never really 'ready' the bow, because that would mean the 638 /* We never really 'ready' the bow, because that would mean the
1352 * weapon would get undone. 639 * weapon would get undone.
1353 */ 640 */
1354 if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK)) 641 if (!(can_apply_object (mon, item) & CAN_APPLY_NOT_MASK))
1355 SET_FLAG (mon, FLAG_READY_BOW); 642 mon->set_flag (FLAG_READY_BOW);
1356 return; 643 return;
1357 } 644 }
1358 else if (item->type == SKILL) 645 else if (item->type == SKILL)
1359 { 646 {
1360 /* 647 /*
1361 * 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,
1362 * else they can't use the skill... 649 * else they can't use the skill...
1363 * Skills also don't need to get applied, so return now. 650 * Skills also don't need to get applied, so return now.
1364 */ 651 */
1365 SET_FLAG (mon, FLAG_READY_SKILL); 652 mon->set_flag (FLAG_READY_SKILL);
1366 return; 653 return;
1367 } 654 }
1368 655
1369 /* 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.
1370 * 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,
… …
1383 670
1384 /* should only be applying this item, not unapplying it. 671 /* should only be applying this item, not unapplying it.
1385 * 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.
1386 * monsters have some advantages after all. 673 * monsters have some advantages after all.
1387 */ 674 */
1388 manual_apply (mon, item, AP_APPLY | AP_IGNORE_CURSE); 675 mon->apply (item, AP_APPLY | AP_IGNORE_CURSE);
1389} 676}
1390 677
1391void 678static int
1392npc_call_help (object *op) 679can_hit (object *ob1, object *ob2, rv_vector * rv)
1393{ 680{
1394 int x, y, mflags;
1395 object *npc; 681 object *more;
1396 sint16 sx, sy; 682 rv_vector rv1;
1397 maptile *m;
1398 683
1399 for (x = -3; x < 4; x++) 684 if (ob1->flag [FLAG_CONFUSED] && !(rndm (3)))
1400 for (y = -3; y < 4; y++) 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)
1401 { 694 {
1402 m = op->map; 695 get_rangevector (ob1, more, &rv1, 0);
1403 sx = op->x + x; 696 if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
1404 sy = op->y + y; 697 return 1;
1405 mflags = get_map_flags (m, &m, sx, sy, &sx, &sy);
1406 /* If nothing alive on this space, no need to search the space. */
1407 if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))
1408 continue;
1409
1410 for (npc = GET_MAP_OB (m, sx, sy); npc != NULL; npc = npc->above)
1411 if (QUERY_FLAG (npc, FLAG_ALIVE) && QUERY_FLAG (npc, FLAG_UNAGGRESSIVE))
1412 npc->enemy = op->enemy;
1413 } 698 }
1414}
1415 699
1416int 700 return 0;
701}
702
703static int
1417dist_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)
1418{ 705{
1419 if (can_hit (part, enemy, rv)) 706 if (can_hit (part, enemy, rv))
1420 return dir; 707 return dir;
708
1421 if (rv->distance < 10) 709 if (rv->distance < 10)
1422 return absdir (dir + 4); 710 return absdir (dir + 4);
1423 else if (rv->distance > 18) 711 else if (rv->distance > 18)
1424 return dir; 712 return dir;
1425 713
1426 return 0; 714 return 0;
1427} 715}
1428 716
1429int 717static int
1430run_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)
1431{ 719{
1432 if ((can_hit (part, enemy, rv) && ob->move_status < 20) || ob->move_status < 20) 720 if (can_hit (part, enemy, rv))
1433 {
1434 ob->move_status++;
1435 return (dir); 721 return dir;
1436 } 722 else
1437 else if (ob->move_status > 20)
1438 ob->move_status = 0;
1439
1440 return absdir (dir + 4); 723 return absdir (dir + 4);
1441} 724}
1442 725
1443int 726static int
1444hitrun_att (int dir, object *ob, object *enemy) 727hitrun_att (int dir, object *ob, object *enemy)
1445{ 728{
1446 if (ob->move_status++ < 25) 729 if (ob->move_status++ < 25)
1447 return dir; 730 return dir;
1448 else if (ob->move_status < 50) 731 else if (ob->move_status < 50)
… …
1451 ob->move_status = 0; 734 ob->move_status = 0;
1452 735
1453 return absdir (dir + 4); 736 return absdir (dir + 4);
1454} 737}
1455 738
1456int 739static int
1457wait_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)
1458{ 741{
1459
1460 int inrange = can_hit (part, enemy, rv); 742 int inrange = can_hit (part, enemy, rv);
1461 743
1462 if (ob->move_status || inrange) 744 if (ob->move_status || inrange)
1463 ob->move_status++; 745 ob->move_status++;
1464 746
… …
1471 753
1472 ob->move_status = 0; 754 ob->move_status = 0;
1473 return 0; 755 return 0;
1474} 756}
1475 757
1476int 758static int
1477disthit_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)
1478{ 760{
1479
1480 /* The logic below here looked plain wrong before. Basically, what should 761 /* The logic below here looked plain wrong before. Basically, what should
1481 * 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,
1482 * the creature should run away (dir+4) 763 * the creature should run away (dir+4)
1483 * 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
1484 * 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
1485 * server should try to be resilant enough to avoid the problem 766 * server should try to be resilant enough to avoid the problem
1486 */ 767 */
1487 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)
1488 return absdir (dir + 4); 769 return absdir (dir + 4);
1489 770
1490 return dist_att (dir, ob, enemy, part, rv); 771 return dist_att (dir, ob, enemy, part, rv);
1491} 772}
1492 773
1493int 774static int
1494wait_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)
1495{ 776{
1496 if (rv->distance < 9) 777 if (rv->distance < 9)
1497 return absdir (dir + 4); 778 return absdir (dir + 4);
1498 779
1499 return 0; 780 return 0;
1500} 781}
1501 782
1502void 783static void
1503circ1_move (object *ob) 784circ1_move (object *ob)
1504{ 785{
1505 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 };
1506 787
1507 if (++ob->move_status > 11) 788 if (++ob->move_status > 11)
1508 ob->move_status = 0; 789 ob->move_status = 0;
1509 790
1510 if (!(move_object (ob, circle[ob->move_status]))) 791 if (!(ob->move (circle[ob->move_status])))
1511 move_object (ob, rndm (8) + 1); 792 ob->move (rndm (8) + 1);
1512} 793}
1513 794
1514void 795static void
1515circ2_move (object *ob) 796circ2_move (object *ob)
1516{ 797{
1517 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 };
1518 799
1519 if (++ob->move_status > 19) 800 if (++ob->move_status > 19)
1520 ob->move_status = 0; 801 ob->move_status = 0;
1521 802
1522 if (!(move_object (ob, circle[ob->move_status]))) 803 if (!(ob->move (circle[ob->move_status])))
1523 move_object (ob, rndm (8) + 1); 804 ob->move (rndm (8) + 1);
1524} 805}
1525 806
1526void 807static void
1527pace_movev (object *ob) 808pace_movev (object *ob)
1528{ 809{
1529 if (ob->move_status++ > 6) 810 if (ob->move_status++ > 6)
1530 ob->move_status = 0; 811 ob->move_status = 0;
1531 812
1532 if (ob->move_status < 4) 813 if (ob->move_status < 4)
1533 move_object (ob, 5); 814 ob->move (5);
1534 else 815 else
1535 move_object (ob, 1); 816 ob->move (1);
1536} 817}
1537 818
1538void 819static void
1539pace_moveh (object *ob) 820pace_moveh (object *ob)
1540{ 821{
1541 if (ob->move_status++ > 6) 822 if (ob->move_status++ > 6)
1542 ob->move_status = 0; 823 ob->move_status = 0;
1543 824
1544 if (ob->move_status < 4) 825 if (ob->move_status < 4)
1545 move_object (ob, 3); 826 ob->move (3);
1546 else 827 else
1547 move_object (ob, 7); 828 ob->move (7);
1548} 829}
1549 830
1550void 831static void
1551pace2_movev (object *ob) 832pace2_movev (object *ob)
1552{ 833{
1553 if (ob->move_status++ > 16) 834 if (ob->move_status++ > 16)
1554 ob->move_status = 0; 835 ob->move_status = 0;
1555 836
1556 if (ob->move_status < 6) 837 if (ob->move_status < 6)
1557 move_object (ob, 5); 838 ob->move (5);
1558 else if (ob->move_status < 8) 839 else if (ob->move_status < 8)
1559 return; 840 return;
1560 else if (ob->move_status < 13) 841 else if (ob->move_status < 13)
1561 move_object (ob, 1); 842 ob->move (1);
1562 else 843 else
1563 return; 844 return;
1564} 845}
1565 846
1566void 847static void
1567pace2_moveh (object *ob) 848pace2_moveh (object *ob)
1568{ 849{
1569 if (ob->move_status++ > 16) 850 if (ob->move_status++ > 16)
1570 ob->move_status = 0; 851 ob->move_status = 0;
1571 852
1572 if (ob->move_status < 6) 853 if (ob->move_status < 6)
1573 move_object (ob, 3); 854 ob->move (3);
1574 else if (ob->move_status < 8) 855 else if (ob->move_status < 8)
1575 return; 856 return;
1576 else if (ob->move_status < 13) 857 else if (ob->move_status < 13)
1577 move_object (ob, 7); 858 ob->move (7);
1578 else 859 else
1579 return; 860 return;
1580} 861}
1581 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
1582void 1180void
1583rand_move (object *ob) 1181npc_call_help (object *op)
1584{ 1182{
1585 int i; 1183 unordered_mapwalk (mapwalk_buf, op, -7, -7, 7, 7)
1184 {
1185 mapspace &ms = m->at (nx, ny);
1586 1186
1587 if (ob->move_status < 1 || ob->move_status > 8 || !(move_object (ob, ob->move_status || !(rndm (9))))) 1187 /* If nothing alive on this space, no need to search the space. */
1588 for (i = 0; i < 5; i++) 1188 if (!(ms.flags () & P_IS_ALIVE))
1589 if (move_object (ob, ob->move_status = rndm (8) + 1)) 1189 continue;
1590 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 }
1591} 1195}
1592 1196
1593void 1197void
1594check_earthwalls (object *op, maptile *m, int x, int y) 1198check_earthwalls (object *op, maptile *m, int x, int y)
1595{ 1199{
1596 object *tmp;
1597
1598 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)
1599 {
1600 if (tmp->type == EARTHWALL) 1201 if (tmp->type == EARTHWALL)
1601 { 1202 {
1602 hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1); 1203 hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1);
1603 return; 1204 return;
1604 } 1205 }
1605 }
1606} 1206}
1607 1207
1608void 1208void
1609check_doors (object *op, maptile *m, int x, int y) 1209check_doors (object *op, maptile *m, int x, int y)
1610{ 1210{
1611 object *tmp;
1612
1613 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)
1614 {
1615 if (tmp->type == DOOR) 1212 if (tmp->type == DOOR)
1616 { 1213 {
1617 hit_player (tmp, 1000, op, AT_PHYSICAL, 1); 1214 hit_player (tmp, 1000, op, AT_PHYSICAL, 1);
1618 return; 1215 return;
1619 } 1216 }
1620 }
1621} 1217}
1622 1218
1623/* find_mon_throw_ob() - modeled on find_throw_ob 1219/* find_mon_throw_ob() - modeled on find_throw_ob
1624 * This is probably overly simplistic as it is now - We want 1220 * This is probably overly simplistic as it is now - We want
1625 * monsters to throw things like chairs and other pieces of 1221 * monsters to throw things like chairs and other pieces of
… …
1641 * marked item and throw it to the enemy. 1237 * marked item and throw it to the enemy.
1642 */ 1238 */
1643 for (tmp = op->inv; tmp; tmp = tmp->below) 1239 for (tmp = op->inv; tmp; tmp = tmp->below)
1644 { 1240 {
1645 /* Can't throw invisible objects or items that are applied */ 1241 /* Can't throw invisible objects or items that are applied */
1646 if (tmp->invisible || QUERY_FLAG (tmp, FLAG_APPLIED)) 1242 if (tmp->invisible || tmp->flag [FLAG_APPLIED])
1647 continue; 1243 continue;
1648 1244
1649 if (QUERY_FLAG (tmp, FLAG_IS_THROWN)) 1245 if (tmp->flag [FLAG_IS_THROWN])
1650 break; 1246 break;
1651 1247
1652 } 1248 }
1653 1249
1654#ifdef DEBUG_THROW 1250#ifdef DEBUG_THROW
1655 LOG (llevDebug, "%s chooses to throw: %s (%d)\n", op->name, !(tmp) ? "(nothing)" : query_name (tmp), tmp ? tmp->count : -1); 1251 LOG (llevDebug, "%s chooses to throw: %s (%d)\n", op->name, !(tmp) ? "(nothing)" : query_name (tmp), tmp ? tmp->count : -1);
1656#endif 1252#endif
1657 1253
1658 return tmp; 1254 return tmp;
1255}
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 = NULL;
1279 else if ((enemy = find_enemy (op, &rv)))
1280 /* we have an enemy, just tell him we want him dead */
1281 enemy->attacked_by = op; /* our ptr */
1282
1283 /* generate hp, if applicable */
1284 if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
1285 {
1286 /* last heal is in funny units. Dividing by speed puts
1287 * the regeneration rate on a basis of time instead of
1288 * #moves the monster makes. The scaling by 8 is
1289 * to capture 8th's of a hp fraction regens
1290 */
1291 uint32_t last_heal = op->last_heal + op->stats.Con * 8 / op->speed;
1292 op->stats.hp = min (op->stats.hp + last_heal / 32, op->stats.maxhp); /* causes Con/4 hp/tick */
1293 op->last_heal = last_heal % 32;
1294
1295 /* So if the monster has gained enough HP that they are no longer afraid */
1296 if (op->flag [FLAG_RUN_AWAY] && op->stats.hp * 100 >= op->stats.maxhp * op->run_away)
1297 op->flag [FLAG_RUN_AWAY] = false;
1298 }
1299
1300 /* generate sp, if applicable */
1301 if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
1302 {
1303 /* last_sp is in funny units. Dividing by speed puts
1304 * the regeneration rate on a basis of time instead of
1305 * #moves the monster makes. The scaling by 8 is
1306 * to capture 8th's of a sp fraction regens
1307 */
1308
1309 uint32_t last_sp = op->last_sp + op->stats.Pow * 8 / op->speed;
1310 op->stats.sp = min (op->stats.sp + last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
1311 op->last_sp = last_sp % 128;
1312 }
1313
1314 /* this should probably get modified by many more values.
1315 * (eg, creatures resistance to fear, level, etc. )
1316 */
1317 if (op->flag [FLAG_SCARED] && !(rndm (20)))
1318 op->clr_flag (FLAG_SCARED); /* Time to regain some "guts"... */
1319
1320 if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
1321 return op->flag [FLAG_FREED];
1322
1323 if (op->flag [FLAG_SLEEP] || op->flag [FLAG_BLIND] ||
1324 ((op->map->darklevel () > 0) && !op->flag [FLAG_SEE_IN_DARK] && !op->flag [FLAG_SEE_INVISIBLE]))
1325 if (!check_wakeup (op, enemy, &rv))
1326 return 0;
1327
1328 /* check if monster pops out of hidden spot */
1329 if (op->flag [FLAG_HIDDEN])
1330 do_hidden_move (op);
1331
1332 if (op->pick_up)
1333 monster_check_pickup (op);
1334
1335 if (op->will_apply)
1336 monster_apply_below (op); /* Check for items to apply below */
1337
1338 /* If we don't have an enemy, do special movement or the like */
1339 if (!enemy)
1340 {
1341 if (op->flag [FLAG_ONLY_ATTACK])
1342 {
1343 op->drop_and_destroy ();
1344 return 1;
1345 }
1346
1347 /* Probably really a bug for a creature to have both
1348 * stand still and a movement type set.
1349 */
1350 if (!op->flag [FLAG_STAND_STILL])
1351 {
1352 if (op->attack_movement & HI4)
1353 {
1354 switch (op->attack_movement & HI4)
1355 {
1356 case PETMOVE:
1357 pet_move (op);
1358 break;
1359
1360 case CIRCLE1:
1361 circ1_move (op);
1362 break;
1363
1364 case CIRCLE2:
1365 circ2_move (op);
1366 break;
1367
1368 case PACEV:
1369 pace_movev (op);
1370 break;
1371
1372 case PACEH:
1373 pace_moveh (op);
1374 break;
1375
1376 case PACEV2:
1377 pace2_movev (op);
1378 break;
1379
1380 case PACEH2:
1381 pace2_moveh (op);
1382 break;
1383
1384 case RANDO:
1385 rand_move (op);
1386 break;
1387
1388 case RANDO2:
1389 move_randomly (op);
1390 break;
1391 }
1392
1393 return 0;
1394 }
1395 else if (op->flag [FLAG_RANDOM_MOVE])
1396 move_randomly (op);
1397 } /* stand still */
1398
1399 return 0;
1400 } /* no enemy */
1401
1402 /* We have an enemy. Block immediately below is for pets */
1403 if ((op->attack_movement & HI4) == PETMOVE
1404 && (owner = op->owner) != NULL
1405 && !on_same_map (op, owner)
1406 && !owner->flag [FLAG_REMOVED])
1407 return follow_owner (op, owner);
1408
1409 /* doppleganger code to change monster facing to that of the nearest
1410 * player. Hmm. The code is here, but no monster in the current
1411 * arch set uses it.
1412 */
1413 if (op->race == shstr_doppleganger)
1414 {
1415 op->face = enemy->face;
1416 op->name = enemy->name;
1417 }
1418
1419 /* Calculate range information for closest body part - this
1420 * is used for the 'skill' code, which isn't that smart when
1421 * it comes to figuring it out - otherwise, giants throw boulders
1422 * into themselves.
1423 */
1424 get_rangevector (op, enemy, &rv, 0);
1425
1426 /* Move the check for scared up here - if the monster was scared,
1427 * we were not doing any of the logic below, so might as well save
1428 * a few cpu cycles.
1429 */
1430 if (!op->flag [FLAG_SCARED])
1431 {
1432 rv_vector rv1;
1433
1434 /* now we test every part of an object .... this is a real ugly piece of code */
1435 for (part = op; part; part = part->more)
1436 {
1437 get_rangevector (part, enemy, &rv1, 0x1);
1438 dir = rv1.direction;
1439
1440 /* hm, not sure about this part - in original was a scared flag here too
1441 * but that we test above... so can be old code here
1442 */
1443 if (op->flag [FLAG_RUN_AWAY])
1444 dir = absdir (dir + 4);
1445
1446 if (op->flag [FLAG_CONFUSED])
1447 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1448
1449 if (op->flag [FLAG_CAST_SPELL] && !(rndm (3)))
1450 if (monster_cast_spell (op, part, enemy, dir, &rv1))
1451 return 0;
1452
1453 if (op->flag [FLAG_READY_SCROLL] && !(rndm (3)))
1454 if (monster_use_scroll (op, part, enemy, dir, &rv1))
1455 return 0;
1456
1457 if (op->flag [FLAG_READY_RANGE] && !(rndm (3)))
1458 if (monster_use_range (op, part, enemy, dir))
1459 return 0;
1460
1461 if (op->flag [FLAG_READY_SKILL] && !(rndm (3)))
1462 if (monster_use_skill (op, rv.part, enemy, rv.direction))
1463 return 0;
1464
1465 if (op->flag [FLAG_READY_BOW] && !(rndm (2)))
1466 if (monster_use_bow (op, part, enemy, dir))
1467 return 0;
1468 } /* for processing of all parts */
1469 } /* If not scared */
1470
1471 part = rv.part;
1472 dir = rv.direction;
1473
1474//-GPL
1475
1476 // if the enemy is a player, we have los. if los says we
1477 // can directly reach the player, we do not deviate.
1478 // for non-players, we never deviate
1479 if (op->stats.Wis >= 8
1480 && enemy->contr && enemy->contr->darkness_at (op->map, op->x, op->y) == LOS_BLOCKED)
1481 {
1482 int sdir = 0;
1483 uint32_t &smell = op->ms ().smell;
1484
1485 for (int ndir = 1; ndir <= 8; ++ndir)
1486 {
1487 mapxy pos (op); pos.move (ndir);
1488
1489 if (pos.normalise ())
1490 {
1491 mapspace &ms = pos.ms ();
1492
1493 if (ms.smell > smell)
1494 {
1495 //printf ("%s: found smell, following it, apparently (%d, %d)\n",& op->name,op->ms().smell,ms.smell);//D
1496 if (op->stats.Wis >= 10)
1497 smell = ms.smell - 1; // smarter: tell others
1498
1499 sdir = ndir;
1500
1501 // perturbing the path might let the monster lose track,
1502 // but it will also widen the actual path, spreading information
1503 if (op->stats.Wis >= 15 && !rndm (20)) // even smarter, deviate and spread?
1504 sdir = absdir (sdir + 1 - rndm (2) * 2);
1505 }
1506 }
1507 }
1508
1509 if (sdir)
1510 dir = sdir;
1511 else if (smell)
1512 {
1513 // no better smell found, so assume the player jumped, and erase this smell
1514 //printf ("erasing smell %d\n", op->ms ().smell);//D
1515 unordered_mapwalk (mapwalk_buf, op, -1, -1, 1, 1)
1516 m->at (nx, ny).smell = 0;
1517 }
1518 }
1519
1520//+GPL
1521
1522 if (op->flag [FLAG_SCARED] || op->flag [FLAG_RUN_AWAY])
1523 dir = absdir (dir + 4);
1524
1525 if (op->flag [FLAG_CONFUSED])
1526 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1527
1528 pre_att_dir = dir; /* remember the original direction */
1529
1530 if ((op->attack_movement & LO4) && !op->flag [FLAG_SCARED])
1531 {
1532 switch (op->attack_movement & LO4)
1533 {
1534 case DISTATT:
1535 dir = dist_att (dir, op, enemy, part, &rv);
1536 break;
1537
1538 case RUNATT:
1539 dir = run_att (dir, op, enemy, part, &rv);
1540 break;
1541
1542 case HITRUN:
1543 dir = hitrun_att (dir, op, enemy);
1544 break;
1545
1546 case WAITATT:
1547 dir = wait_att (dir, op, enemy, part, &rv);
1548 break;
1549
1550 case RUSH: /* default - monster normally moves towards player */
1551 case ALLRUN:
1552 break;
1553
1554 case DISTHIT:
1555 dir = disthit_att (dir, op, enemy, part, &rv);
1556 break;
1557
1558 case WAIT2:
1559 dir = wait_att2 (dir, op, enemy, part, &rv);
1560 break;
1561
1562 default:
1563 LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
1564 }
1565 }
1566
1567 if (!dir)
1568 return 0;
1569
1570 if (!op->flag [FLAG_STAND_STILL])
1571 {
1572 if (op->move (dir)) /* Can the monster move directly toward player? */
1573 {
1574 /* elmex: Turn our monster after it moved if it has DISTATT attack */
1575 if ((op->attack_movement & LO4) == DISTATT)
1576 op->direction = pre_att_dir;
1577
1578 return 0;
1579 }
1580
1581 if (op->flag [FLAG_SCARED] || !can_hit (part, enemy, &rv) || op->flag [FLAG_RUN_AWAY])
1582 {
1583 /* Try move around corners if !close */
1584 int maxdiff = (op->flag [FLAG_ONLY_ATTACK] || rndm (2)) ? 1 : 2;
1585
1586 for (diff = 1; diff <= maxdiff; diff++)
1587 {
1588 /* try different detours */
1589 int m = 1 - rndm (2) * 2; /* Try left or right first? */
1590
1591 if (op->move (absdir (dir + diff * m)) || op->move (absdir (dir - diff * m)))
1592 return 0;
1593 }
1594 }
1595 } /* if monster is not standing still */
1596
1597 /* elmex: Turn our monster after it moved if it has DISTATT attack */
1598 if ((op->attack_movement & LO4) == DISTATT)
1599 op->direction = pre_att_dir;
1600
1601 /*
1602 * Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
1603 * direction if they can't move away.
1604 */
1605 if (!op->flag [FLAG_ONLY_ATTACK] && (op->flag [FLAG_RUN_AWAY] || op->flag [FLAG_SCARED]))
1606 if (move_randomly (op))
1607 return 0;
1608
1609 /*
1610 * Try giving the monster a new enemy - the player that is closest
1611 * to it. In this way, it won't just keep trying to get to a target
1612 * that is inaccessible.
1613 * This could be more clever - it should go through a list of several
1614 * enemies, as it is now, you could perhaps get situations where there
1615 * are two players flanking the monster at close distance, but which
1616 * the monster can't get to, and a third one at a far distance that
1617 * the monster could get to - as it is, the monster won't look at that
1618 * third one.
1619 */
1620 if (!op->flag [FLAG_FRIENDLY] && enemy == op->enemy)
1621 {
1622 object *nearest_player = get_nearest_player (op);
1623
1624 if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
1625 {
1626 op->enemy = 0;
1627 enemy = nearest_player;
1628 }
1629 }
1630
1631 if (!op->flag [FLAG_SCARED] && can_hit (part, enemy, &rv))
1632 {
1633 /* The adjustement to wc that was here before looked totally bogus -
1634 * since wc can in fact get negative, that would mean by adding
1635 * the current wc, the creature gets better? Instead, just
1636 * add a fixed amount - nasty creatures that are runny away should
1637 * still be pretty nasty.
1638 */
1639 if (op->flag [FLAG_RUN_AWAY])
1640 {
1641 part->stats.wc += 10;
1642 skill_attack (enemy, part, 0, NULL, NULL);
1643 part->stats.wc -= 10;
1644 }
1645 else
1646 skill_attack (enemy, part, 0, NULL, NULL);
1647 } /* if monster is in attack range */
1648
1649 if (part->flag [FLAG_FREED]) /* Might be freed by ghost-attack or hit-back */
1650 return 1;
1651
1652 if (op->flag [FLAG_ONLY_ATTACK])
1653 {
1654 op->drop_and_destroy ();
1655 return 1;
1656 }
1657
1658 return 0;
1659} 1659}
1660 1660
1661/* 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
1662 * 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
1663 * 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.
… …
1665 * 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
1666 * 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
1667 * be within the valid range. MSW 2001-08-05 1667 * be within the valid range. MSW 2001-08-05
1668 * 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
1669 */ 1669 */
1670
1671int 1670int
1672can_detect_enemy (object *op, object *enemy, rv_vector * rv) 1671can_detect_enemy (object *op, object *enemy, rv_vector * rv)
1673{ 1672{
1674 int radius = MIN_MON_RADIUS, hide_discovery;
1675
1676 /* null detection for any of these condtions always */ 1673 /* null detection for any of these condtions always */
1677 if (!op || !enemy || !op->map || !enemy->map) 1674 if (!op || !enemy || !op->map || !enemy->map)
1678 return 0; 1675 return 0;
1679 1676
1680 /* 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 */
… …
1682 return 0; 1679 return 0;
1683 1680
1684 get_rangevector (op, enemy, rv, 0); 1681 get_rangevector (op, enemy, rv, 0);
1685 1682
1686 /* Monsters always ignore the DM */ 1683 /* Monsters always ignore the DM */
1687 if ((op->type != PLAYER) && QUERY_FLAG (enemy, FLAG_WIZ)) 1684 if (!op->is_player () && enemy->flag [FLAG_WIZ])
1688 return 0; 1685 return 0;
1689 1686
1690 /* simple check. Should probably put some range checks in here. */ 1687 /* simple check. Should probably put some range checks in here. */
1691 if (can_see_enemy (op, enemy)) 1688 if (can_see_enemy (op, enemy))
1692 return 1; 1689 return 1;
1693 1690
1694 /* 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
1695 * finding enemies! 1692 * finding enemies!
1696 */ 1693 */
1697 if (op->type == PLAYER) 1694 if (op->is_player ())
1698 return 0; 1695 return 0;
1699 1696
1700 /* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE 1697 /* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE
1701 * 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
1702 */ 1699 */
1703 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)))
1704 return 0; 1701 return 0;
1705 1702
1703 int radius = MIN_MON_RADIUS;
1704
1706 /* use this for invis also */ 1705 /* use this for invis also */
1707 hide_discovery = op->stats.Int / 5; 1706 int hide_discovery = op->stats.Int / 5;
1708 1707
1709 /* Determine Detection radii */ 1708 /* Determine Detection radii */
1710 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) */
1711 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);
1712 else 1711 else
1713 { /* a level/INT/Dex adjustment for hiding */ 1712 { /* a level/INT/Dex adjustment for hiding */
1714 object *sk_hide;
1715 int bonus = (op->level / 2) + (op->stats.Int / 5); 1713 int bonus = op->level / 2 + op->stats.Int / 5;
1716 1714
1717 if (enemy->type == PLAYER) 1715 if (enemy->is_player ())
1718 { 1716 {
1719 if ((sk_hide = find_skill_by_number (enemy, SK_HIDING))) 1717 if (object *sk_hide = find_skill_by_number (enemy, SK_HIDING))
1720 bonus -= sk_hide->level; 1718 bonus -= sk_hide->level;
1721 else 1719 else
1722 { 1720 {
1723 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");
1724 make_visible (enemy); 1722 make_visible (enemy);
… …
1732 hide_discovery += bonus * 5; 1730 hide_discovery += bonus * 5;
1733 } /* else creature has modifiers for hiding */ 1731 } /* else creature has modifiers for hiding */
1734 1732
1735 /* Radii stealth adjustment. Only if you are stealthy 1733 /* Radii stealth adjustment. Only if you are stealthy
1736 * will you be able to sneak up closer to creatures */ 1734 * will you be able to sneak up closer to creatures */
1737 if (QUERY_FLAG (enemy, FLAG_STEALTH)) 1735 if (enemy->flag [FLAG_STEALTH])
1738 radius = radius / 2, hide_discovery = hide_discovery / 3; 1736 {
1737 radius /= 2;
1738 hide_discovery /= 3;
1739 }
1739 1740
1740 /* Radii adjustment for enemy standing in the dark */ 1741 /* Radii adjustment for enemy standing in the dark */
1741 if (op->map->darkness > 0 && !stand_in_light (enemy)) 1742 if (!stand_in_light (enemy))
1742 { 1743 {
1743 /* on dark maps body heat can help indicate location with infravision 1744 /* on dark maps body heat can help indicate location with infravision
1744 * undead don't have body heat, so no benefit detecting them. 1745 * undead don't have body heat, so no benefit detecting them.
1745 */ 1746 */
1746 if (QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !is_true_undead (enemy)) 1747 if (op->flag [FLAG_SEE_IN_DARK] && !is_true_undead (enemy))
1747 radius += op->map->darkness / 2; 1748 radius += op->map->darklevel () / 2;
1748 else 1749 else
1749 radius -= op->map->darkness / 2; 1750 radius -= op->map->darklevel () / 2;
1750 1751
1751 /* op next to a monster (and not in complete darkness) 1752 /* op next to a monster (and not in complete darkness)
1752 * the monster should have a chance to see you. 1753 * the monster should have a chance to see you.
1753 */ 1754 */
1754 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)
1755 radius = MIN_MON_RADIUS; 1756 radius = MIN_MON_RADIUS;
1756 } /* if on dark map */ 1757 } /* if on dark map */
1757 1758
1758 /* Lets not worry about monsters that have incredible detection 1759 /* Lets not worry about monsters that have incredible detection
1759 * 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
… …
1761 * 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
1762 * do something. Note that the distance field in the 1763 * do something. Note that the distance field in the
1763 * 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
1764 * find that. 1765 * find that.
1765 */ 1766 */
1766 if (radius > 13) 1767 // note that the above reasoning was utter bullshit even at the time it was written
1767 radius = 13; 1768 // we use 25, lets see if we have the cpu time for it
1769 radius = min (25, radius);
1768 1770
1769 /* Enemy in range! Now test for detection */ 1771 /* Enemy in range! Now test for detection */
1770 if ((int) rv->distance <= radius) 1772 if (rv->distance <= radius)
1771 { 1773 {
1772 /* ah, we are within range, detected? take cases */ 1774 /* ah, we are within range, detected? take cases */
1773 if (!enemy->invisible) /* enemy in dark squares... are seen! */ 1775 if (!enemy->invisible) /* enemy in dark squares... are seen! */
1774 return 1; 1776 return 1;
1775 1777
1776 /* hidden or low-quality invisible */ 1778 /* hidden or low-quality invisible */
1777 if (enemy->hide && (rv->distance <= 1) && (rndm (100) <= hide_discovery)) 1779 if (enemy->flag [FLAG_HIDDEN] && rv->distance <= 1 && rndm (100) <= hide_discovery)
1778 { 1780 {
1779 make_visible (enemy); 1781 make_visible (enemy);
1782
1780 /* inform players of new status */ 1783 /* inform players of new status */
1781 if (enemy->type == PLAYER && player_can_view (enemy, op)) 1784 if (enemy->type == PLAYER && player_can_view (enemy, op))
1782 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
1783 return 1; /* detected enemy */ 1787 return 1; /* detected enemy */
1784 } 1788 }
1785 else if (enemy->invisible) 1789 else if (enemy->invisible)
1786 { 1790 {
1787 /* Change this around - instead of negating the invisible, just 1791 /* Change this around - instead of negating the invisible, just
1788 * 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
1789 * do something to you. Decreasing the duration of invisible 1793 * do something to you. Decreasing the duration of invisible
1790 * 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
1791 * can then basically negate the spell. The spell isn't negated - 1795 * can then basically negate the spell. The spell isn't negated -
1792 * they just know where you are! 1796 * they just know where you are!
1793 */ 1797 */
1794 if ((rndm (50)) <= hide_discovery) 1798 if (rndm (50) <= hide_discovery)
1795 { 1799 {
1796 if (enemy->type == PLAYER) 1800 if (enemy->type == PLAYER)
1797 {
1798 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));
1799 } 1802
1800 return 1; 1803 return 1;
1801 } 1804 }
1802 } 1805 }
1803 } /* within range */ 1806 } /* within range */
1804 1807
1805 /* Wasn't detected above, so still hidden */ 1808 /* Wasn't detected above, so still hidden */
1806 return 0; 1809 return 0;
1807} 1810}
1808 1811
1809/* 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
1810 * intellegent algorithm. For one thing, we ignore los here, SO it 1813 * intelligent algorithm. For one thing, we ignore los here, SO it
1811 * 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
1812 * other side of a wall (!). 1815 * other side of a wall (!).
1813 */ 1816 */
1814int 1817int
1815stand_in_light (object *op) 1818stand_in_light (object *op)
1816{ 1819{
1817 sint16 nx, ny;
1818 maptile *m;
1819
1820 if (!op) 1820 if (op)
1821 {
1822 if (!op->is_on_map ())
1821 return 0; 1823 return 0;
1822 1824
1825 if (op->map->darklevel () <= 0)
1826 return 1;
1827
1823 if (op->glow_radius > 0) 1828 if (op->glow_radius > 0)
1824 return 1; 1829 return 1;
1825 1830
1826 if (op->map) 1831 if (op->map)
1827 { 1832 unordered_mapwalk (mapwalk_buf, op, -MAX_LIGHT_RADIUS, -MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS)
1828 int x, y, x1, y1; 1833 {
1834 mapspace &ms = m->at (nx, ny);
1829 1835
1836 ms.update ();
1837
1830 /* 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
1831 * 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.
1832 */
1833 for (x = op->x - MAX_LIGHT_RADII; x <= op->x + MAX_LIGHT_RADII; x++)
1834 {
1835 for (y = op->y - MAX_LIGHT_RADII; y <= op->y + MAX_LIGHT_RADII; y++)
1836 { 1840 */
1837 m = op->map; 1841 int light = ms.light;
1838 nx = x;
1839 ny = y;
1840 1842
1841 if (get_map_flags (m, &m, nx, ny, &nx, &ny) & P_OUT_OF_MAP) 1843 if (expect_false (light > 0) && idistance (dx, dy) <= light)
1842 continue;
1843
1844 x1 = abs (x - op->x) * abs (x - op->x);
1845 y1 = abs (y - op->y) * abs (y - op->y);
1846 if (isqrt (x1 + y1) < GET_MAP_LIGHT (m, nx, ny))
1847 return 1; 1844 return 1;
1848 } 1845 }
1849 }
1850 } 1846 }
1851 1847
1852 return 0; 1848 return 0;
1853} 1849}
1854 1850
… …
1861can_see_enemy (object *op, object *enemy) 1857can_see_enemy (object *op, object *enemy)
1862{ 1858{
1863 object *looker = op->head ? op->head : op; 1859 object *looker = op->head ? op->head : op;
1864 1860
1865 /* safety */ 1861 /* safety */
1866 if (!looker || !enemy || !QUERY_FLAG (looker, FLAG_ALIVE)) 1862 if (!looker || !enemy || !looker->flag [FLAG_ALIVE])
1867 return 0; 1863 return 0;
1868 1864
1869 /* 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,
1870 * 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
1871 * blind even if you can xray? 1867 * blind even if you can xray?
1872 */ 1868 */
1873 if (QUERY_FLAG (looker, FLAG_BLIND) && !QUERY_FLAG (looker, FLAG_XRAYS)) 1869 if (looker->flag [FLAG_BLIND] && !looker->flag [FLAG_XRAYS])
1874 return 0; 1870 return 0;
1875 1871
1876 /* checking for invisible things */ 1872 /* checking for invisible things */
1877 if (enemy->invisible) 1873 if (enemy->invisible)
1878 { 1874 {
1879 /* HIDDEN ENEMY. by definition, you can't see hidden stuff! 1875 /* HIDDEN ENEMY. by definition, you can't see hidden stuff!
1880 * However,if you carry any source of light, then the hidden 1876 * However,if you carry any source of light, then the hidden
1881 * creature is seeable (and stupid) */ 1877 * creature is seeable (and stupid) */
1882 1878
1883 if (has_carried_lights (enemy)) 1879 if (enemy->has_carried_lights ())
1884 { 1880 {
1885 if (enemy->hide) 1881 if (enemy->flag [FLAG_HIDDEN])
1886 { 1882 {
1887 make_visible (enemy); 1883 make_visible (enemy);
1888 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!");
1889 } 1885 }
1886
1890 return 1; 1887 return 1;
1891 } 1888 }
1892 else if (enemy->hide) 1889 else if (enemy->flag [FLAG_HIDDEN])
1893 return 0; 1890 return 0;
1894 1891
1895 /* Invisible enemy. Break apart the check for invis undead/invis looker 1892 /* Invisible enemy. Break apart the check for invis undead/invis looker
1896 * 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,
1897 * and making it a conditional makes the code pretty ugly. 1894 * and making it a conditional makes the code pretty ugly.
1898 */ 1895 */
1899 if (!QUERY_FLAG (looker, FLAG_SEE_INVISIBLE)) 1896 if (!looker->flag [FLAG_SEE_INVISIBLE])
1900 {
1901 if (makes_invisible_to (enemy, looker)) 1897 if (makes_invisible_to (enemy, looker))
1902 return 0; 1898 return 0;
1903 }
1904 } 1899 }
1905 else if (looker->type == PLAYER) /* for players, a (possible) shortcut */ 1900 else if (looker->is_player ()) /* for players, a (possible) shortcut */
1906 if (player_can_view (looker, enemy)) 1901 if (player_can_view (looker, enemy))
1907 return 1; 1902 return 1;
1908 1903
1909 /* ENEMY IN DARK MAP. Without infravision, the enemy is not seen 1904 /* ENEMY IN DARK MAP. Without infravision, the enemy is not seen
1910 * unless they carry a light or stand in light. Darkness doesnt 1905 * unless they carry a light or stand in light. Darkness doesnt
… …
1913 * we care about the enemy maps status, not the looker. 1908 * we care about the enemy maps status, not the looker.
1914 * only relevant for tiled maps, but it is possible that the 1909 * only relevant for tiled maps, but it is possible that the
1915 * 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
1916 * case, the looker can still see the enemy 1911 * case, the looker can still see the enemy
1917 */ 1912 */
1918 if (enemy->map->darkness > 0 && !stand_in_light (enemy) 1913 if (!stand_in_light (enemy)
1919 && (!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]))
1920 return 0; 1915 return 0;
1921 1916
1922 return 1; 1917 return 1;
1923} 1918}
1919
1920//-GPL

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