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Comparing deliantra/server/server/monster.C (file contents):
Revision 1.28 by root, Tue May 1 05:48:20 2007 UTC vs.
Revision 1.78 by root, Sun Feb 7 04:22:33 2010 UTC

1/* 1/*
2 * CrossFire, A Multiplayer game 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * 3 *
4 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team 4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (C) 2002 Mark Wedel & Crossfire Development Team 5 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6 * Copyright (C) 1992 Frank Tore Johansen 6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 * 7 *
8 * This program is free software; you can redistribute it and/or modify 8 * Deliantra is free software: you can redistribute it and/or modify it under
9 * it under the terms of the GNU General Public License as published by 9 * the terms of the Affero GNU General Public License as published by the
10 * the Free Software Foundation; either version 2 of the License, or 10 * Free Software Foundation, either version 3 of the License, or (at your
11 * (at your option) any later version. 11 * option) any later version.
12 * 12 *
13 * This program is distributed in the hope that it will be useful, 13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License 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 18 * You should have received a copy of the Affero GNU General Public License
19 * along with this program; if not, write to the Free Software 19 * and the GNU General Public License along with this program. If not, see
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 * <http://www.gnu.org/licenses/>.
21 * 21 *
22 * The authors can be reached via e-mail at <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
… …
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 (QUERY_FLAG (npc->enemy, FLAG_REMOVED) ||
70 QUERY_FLAG (npc->enemy, FLAG_FREED) || 71 QUERY_FLAG (npc->enemy, 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 || QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (npc->enemy, 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 (QUERY_FLAG (npc, FLAG_FRIENDLY) && ((QUERY_FLAG (npc->enemy, 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 (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (npc->enemy, 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
… …
89 */ 90 */
90 else if (!QUERY_FLAG (npc->enemy, FLAG_MONSTER) 91 else if (!QUERY_FLAG (npc->enemy, FLAG_MONSTER)
91 && !QUERY_FLAG (npc->enemy, FLAG_GENERATOR) 92 && !QUERY_FLAG (npc->enemy, 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
… …
145 } 146 }
146 147
147 return 0; 148 return 0;
148} 149}
149 150
150
151/* Tries to find an enmy for npc. We pass the range vector since 151/* Tries to find an enemy for npc. We pass the range vector since
152 * our caller will find the information useful. 152 * our caller will find the information useful.
153 * Currently, only move_monster calls this function. 153 * Currently, only move_monster calls this function.
154 * Fix function so that we always make calls to get_rangevector 154 * Fix function so that we always make calls to get_rangevector
155 * 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
156 * many cases. 156 * many cases.
157 */ 157 */
158 158static object *
159object *
160find_enemy (object *npc, rv_vector * rv) 159find_enemy (object *npc, rv_vector * rv)
161{ 160{
162 object *attacker, *tmp = NULL; 161 object *attacker, *tmp = NULL;
163 162
164 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. */
… …
169 { 168 {
170 tmp = find_nearest_living_creature (npc); 169 tmp = find_nearest_living_creature (npc);
171 170
172 if (tmp) 171 if (tmp)
173 get_rangevector (npc, tmp, rv, 0); 172 get_rangevector (npc, tmp, rv, 0);
173
174 return tmp; 174 return tmp;
175 } 175 }
176 176
177 /* Here is the main enemy selection. 177 /* Here is the main enemy selection.
178 * 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
… …
198 /* we check our old enemy. */ 198 /* we check our old enemy. */
199 if (!(tmp = check_enemy (npc, rv))) 199 if (!(tmp = check_enemy (npc, rv)))
200 { 200 {
201 if (attacker) /* if we have an attacker, check him */ 201 if (attacker) /* if we have an attacker, check him */
202 { 202 {
203 /* TODO: thats not finished */ 203 /* TODO: that's not finished */
204 /* 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 */
205 205
206 if (QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (attacker, FLAG_NEUTRAL) || /* neutral */ 206 if (QUERY_FLAG (npc, FLAG_NEUTRAL) || QUERY_FLAG (attacker, FLAG_NEUTRAL) || /* neutral */
207 (QUERY_FLAG (npc, FLAG_FRIENDLY) && QUERY_FLAG (attacker, FLAG_FRIENDLY)) || 207 (QUERY_FLAG (npc, FLAG_FRIENDLY) && QUERY_FLAG (attacker, FLAG_FRIENDLY)) ||
208 (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (attacker, FLAG_FRIENDLY) && attacker->type != PLAYER))) 208 (!QUERY_FLAG (npc, FLAG_FRIENDLY) && (!QUERY_FLAG (attacker, FLAG_FRIENDLY) && attacker->type != PLAYER)))
209 CLEAR_FLAG (npc, FLAG_SLEEP); /* skip it, but lets wakeup */ 209 CLEAR_FLAG (npc, FLAG_SLEEP); /* skip it, but lets wakeup */
210 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... */
211 { 211 {
212 CLEAR_FLAG (npc, FLAG_SLEEP); /* well, NOW we really should wake up! */ 212 CLEAR_FLAG (npc, FLAG_SLEEP); /* well, NOW we really should wake up! */
213 npc->enemy = attacker; 213 npc->enemy = attacker;
214 return attacker; /* yes, we face our attacker! */ 214 return attacker; /* yes, we face our attacker! */
215 } 215 }
… …
231/* Sees if this monster should wake up. 231/* Sees if this monster should wake up.
232 * Currently, this is only called from move_monster, and 232 * Currently, this is only called from move_monster, and
233 * if enemy is set, then so should be rv. 233 * if enemy is set, then so should be rv.
234 * returns 1 if the monster should wake up, 0 otherwise. 234 * returns 1 if the monster should wake up, 0 otherwise.
235 */ 235 */
236 236static int
237int
238check_wakeup (object *op, object *enemy, rv_vector * rv) 237check_wakeup (object *op, object *enemy, rv_vector *rv)
239{ 238{
240 int radius = op->stats.Wis > MIN_MON_RADIUS ? op->stats.Wis : MIN_MON_RADIUS;
241
242 /* Trim work - if no enemy, no need to do anything below */ 239 /* Trim work - if no enemy, no need to do anything below */
243 if (!enemy) 240 if (!enemy)
244 return 0; 241 return 0;
245 242
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])
246 /* blinded monsters can only find nearby objects to attack */ 249 /* blinded monsters can only find nearby objects to attack */
247 if (QUERY_FLAG (op, FLAG_BLIND))
248 radius = MIN_MON_RADIUS; 250 radius = MIN_MON_RADIUS;
249 251 else if (op->map
252 && !enemy->invisible
253 && !stand_in_light (enemy)
254 && (!op->flag[FLAG_SEE_IN_DARK] || !op->flag [FLAG_SEE_INVISIBLE]))
250 /* This covers the situation where the monster is in the dark 255 /* This covers the situation where the monster is in the dark
251 * 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
252 * glowing!) then the monster has trouble finding the enemy. 257 * glowing!) then the monster has trouble finding the enemy.
253 * 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
254 * the dark. */ 259 * the dark. */
260 radius = min (radius, MIN_MON_RADIUS + MAX_DARKNESS - op->map->darklevel ());
255 261
256 else if (op->map && op->map->darkness > 0 && enemy && !enemy->invisible && 262 if (enemy->flag [FLAG_STEALTH])
257 !stand_in_light (enemy) && (!QUERY_FLAG (op, FLAG_SEE_IN_DARK) || !QUERY_FLAG (op, FLAG_SEE_INVISIBLE))) 263 radius = radius / 2 + 1;
258 {
259 int dark = radius / (op->map->darkness);
260
261 radius = (dark > MIN_MON_RADIUS) ? (dark + 1) : MIN_MON_RADIUS;
262 }
263 else if (!QUERY_FLAG (op, FLAG_SLEEP))
264 return 1;
265 264
266 /* 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
267 * for that. 266 * for that.
268 */ 267 */
269 if (rv->distance < (unsigned int) (QUERY_FLAG (enemy, FLAG_STEALTH) ? (radius / 2) + 1 : radius)) 268 if (rv->distance <= radius)
270 { 269 {
271 CLEAR_FLAG (op, FLAG_SLEEP); 270 CLEAR_FLAG (op, FLAG_SLEEP);
272 return 1; 271 return 1;
273 } 272 }
273
274 return 0; 274 return 0;
275} 275}
276 276
277int 277static int
278move_randomly (object *op) 278move_randomly (object *op)
279{ 279{
280 /* Give up to 15 chances for a monster to move randomly */
281 for (int i = 0; i < 15; i++)
282 if (move_object (op, 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;
280 int i; 298 int i;
281 299
282 /* Give up to 15 chances for a monster to move randomly */ 300 if (!can_pick (monster, item))
283 for (i = 0; i < 15; i++) 301 return 0;
302
303 if (QUERY_FLAG (item, FLAG_UNPAID))
304 return 0;
305
306 if (monster->pick_up & 64) /* All */
307 flag = 1;
308
309 else
310 switch (item->type)
284 { 311 {
285 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) || QUERY_FLAG (monster, 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) || QUERY_FLAG (monster, FLAG_USE_ARMOUR);
332 break;
333
334 case SKILL:
335 flag = QUERY_FLAG (monster, FLAG_CAN_USE_SKILL);
336 break;
337
338 case RING:
339 flag = QUERY_FLAG (monster, FLAG_USE_RING);
340 break;
341
342 case WAND:
343 case HORN:
344 case ROD:
345 flag = QUERY_FLAG (monster, FLAG_USE_RANGE);
346 break;
347
348 case SPELLBOOK:
349 flag = monster->arch && QUERY_FLAG (monster->arch, FLAG_CAST_SPELL);
350 break;
351
352 case SCROLL:
353 flag = QUERY_FLAG (monster, FLAG_USE_SCROLL);
354 break;
355
356 case BOW:
357 case ARROW:
358 flag = QUERY_FLAG (monster, FLAG_USE_BOW);
359 break;
360 }
361
362 /* Simplistic check - if the monster has a location to equip it, he will
363 * pick it up. Note that this doesn't handle cases where an item may
364 * use several locations.
365 */
366 for (i = 0; i < NUM_BODY_LOCATIONS; i++)
367 {
368 if (monster->slot[i].info && item->slot[i].info)
369 {
370 flag = 1;
371 break;
372 }
373 }
374
375 if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
286 return 1; 376 return 1;
287 } 377
288 return 0; 378 return 0;
289} 379}
290 380
291/* 381/*
292 * Move-monster returns 1 if the object has been freed, otherwise 0. 382 * monster_check_pickup(): checks for items that monster can pick up.
383 *
384 * Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
385 * Each time the blob passes over some treasure, it will
386 * grab it a.s.a.p.
387 *
388 * Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
389 * to handle this.
390 *
391 * This function was seen be continueing looping at one point (tmp->below
392 * became a recursive loop. It may be better to call monster_check_apply
393 * after we pick everything up, since that function may call others which
394 * affect stacking on this space.
293 */ 395 */
294 396static void
295int 397monster_check_pickup (object *monster)
296move_monster (object *op)
297{ 398{
298 int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */ 399 object *tmp, *next;
299 object *owner, *enemy, *part, *oph = op;
300 rv_vector rv;
301 400
302 /* Monsters not on maps don't do anything. These monsters are things 401 for (tmp = monster->below; tmp != NULL; tmp = next)
303 * Like royal guards in city dwellers inventories.
304 */
305 if (!op->map)
306 return 0;
307
308 /* for target facing, we copy this value here for fast access */
309 if (oph->head) /* force update the head - one arch one pic */
310 oph = oph->head;
311
312 if (QUERY_FLAG (op, FLAG_NO_ATTACK)) /* we never ever attack */
313 enemy = op->enemy = NULL;
314 else if ((enemy = find_enemy (op, &rv)))
315 /* we have an enemy, just tell him we want him dead */
316 enemy->attacked_by = op; /* our ptr */
317
318 /* generate hp, if applicable */
319 if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
320 { 402 {
321 403 next = tmp->below;
322 /* last heal is in funny units. Dividing by speed puts 404 if (monster_can_pick (monster, tmp))
323 * the regeneration rate on a basis of time instead of
324 * #moves the monster makes. The scaling by 8 is
325 * to capture 8th's of a hp fraction regens
326 * 405 {
327 * Cast to sint32 before comparing to maxhp since otherwise an (sint16) 406 tmp->remove ();
328 * overflow might produce monsters with negative hp. 407 tmp = insert_ob_in_ob (tmp, monster);
408 monster_check_apply (monster, tmp);
409 }
410
411 /* We could try to re-establish the cycling, of the space, but probably
412 * not a big deal to just bail out.
329 */ 413 */
330 414 if (next && next->destroyed ())
331 op->last_heal += (int) ((float) (8 * op->stats.Con) / FABS (op->speed));
332 op->stats.hp = MIN ((sint32) op->stats.hp + op->last_heal / 32, op->stats.maxhp); /* causes Con/4 hp/tick */
333 op->last_heal %= 32;
334
335 /* So if the monster has gained enough HP that they are no longer afraid */
336 if (QUERY_FLAG (op, FLAG_RUN_AWAY) && op->stats.hp >= (signed short) (((float) op->run_away / (float) 100) * (float) op->stats.maxhp))
337 CLEAR_FLAG (op, FLAG_RUN_AWAY);
338
339 if (op->stats.hp > op->stats.maxhp)
340 op->stats.hp = op->stats.maxhp;
341 }
342
343 /* generate sp, if applicable */
344 if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
345 {
346
347 /* last_sp is in funny units. Dividing by speed puts
348 * the regeneration rate on a basis of time instead of
349 * #moves the monster makes. The scaling by 8 is
350 * to capture 8th's of a sp fraction regens
351 *
352 * Cast to sint32 before comparing to maxhp since otherwise an (sint16)
353 * overflow might produce monsters with negative sp.
354 */
355
356 op->last_sp += (int) ((float) (8 * op->stats.Pow) / FABS (op->speed));
357 op->stats.sp = MIN (op->stats.sp + op->last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
358 op->last_sp %= 128;
359 }
360
361 /* this should probably get modified by many more values.
362 * (eg, creatures resistance to fear, level, etc. )
363 */
364 if (QUERY_FLAG (op, FLAG_SCARED) && !(rndm (20)))
365 {
366 CLEAR_FLAG (op, FLAG_SCARED); /* Time to regain some "guts"... */
367 }
368
369 if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
370 return QUERY_FLAG (op, FLAG_FREED);
371
372 if (QUERY_FLAG (op, FLAG_SLEEP) || QUERY_FLAG (op, FLAG_BLIND) ||
373 ((op->map->darkness > 0) && !QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
374 {
375 if (!check_wakeup (op, enemy, &rv))
376 return 0; 415 return;
377 }
378
379 /* check if monster pops out of hidden spot */
380 if (op->hide)
381 do_hidden_move (op);
382
383 if (op->pick_up)
384 monster_check_pickup (op);
385
386 if (op->will_apply)
387 monster_apply_below (op); /* Check for items to apply below */
388
389 /* If we don't have an enemy, do special movement or the like */
390 if (!enemy)
391 { 416 }
392 if (QUERY_FLAG (op, FLAG_ONLY_ATTACK)) 417}
393 { 418
394 op->destroy (); 419/*
395 return 1; 420 * monster_apply_below():
421 * Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
422 * eager to apply things, encounters something apply-able,
423 * then make him apply it
424 */
425static void
426monster_apply_below (object *monster)
427{
428 object *tmp, *next;
429
430 for (tmp = monster->below; tmp != NULL; tmp = next)
431 {
432 next = tmp->below;
433 switch (tmp->type)
396 } 434 {
397 435 case T_HANDLE:
398 /* Probably really a bug for a creature to have both
399 * stand still and a movement type set.
400 */
401 if (!QUERY_FLAG (op, FLAG_STAND_STILL))
402 {
403 if (op->attack_movement & HI4)
404 {
405 switch (op->attack_movement & HI4)
406 {
407 case (PETMOVE):
408 pet_move (op);
409 break;
410
411 case (CIRCLE1):
412 circ1_move (op);
413 break;
414
415 case (CIRCLE2):
416 circ2_move (op);
417 break;
418
419 case (PACEV):
420 pace_movev (op);
421 break;
422
423 case (PACEH):
424 pace_moveh (op);
425 break;
426
427 case (PACEV2):
428 pace2_movev (op);
429 break;
430
431 case (PACEH2):
432 pace2_moveh (op);
433 break;
434
435 case (RANDO):
436 rand_move (op);
437 break;
438
439 case (RANDO2):
440 move_randomly (op);
441 break;
442 }
443 return 0;
444 }
445 else if (QUERY_FLAG (op, FLAG_RANDOM_MOVE))
446 (void) move_randomly (op);
447
448 } /* stand still */
449 return 0;
450 } /* no enemy */
451
452 /* We have an enemy. Block immediately below is for pets */
453 if ((op->attack_movement & HI4) == PETMOVE
454 && (owner = op->owner) != NULL
455 && !on_same_map (op, owner)
456 && !owner->flag [FLAG_REMOVED])
457 return follow_owner (op, owner);
458
459 /* doppleganger code to change monster facing to that of the nearest
460 * player. Hmm. The code is here, but no monster in the current
461 * arch set uses it.
462 */
463 if ((op->race != NULL) && strcmp (op->race, "doppleganger") == 0)
464 {
465 op->face = enemy->face;
466 op->name = enemy->name;
467 }
468
469 /* Calculate range information for closest body part - this
470 * is used for the 'skill' code, which isn't that smart when
471 * it comes to figuring it out - otherwise, giants throw boulders
472 * into themselves.
473 */
474 get_rangevector (op, enemy, &rv, 0);
475
476 /* Move the check for scared up here - if the monster was scared,
477 * we were not doing any of the logic below, so might as well save
478 * a few cpu cycles.
479 */
480 if (!QUERY_FLAG (op, FLAG_SCARED))
481 {
482 rv_vector rv1;
483
484 /* now we test every part of an object .... this is a real ugly piece of code */
485 for (part = op; part != NULL; part = part->more)
486 {
487 get_rangevector (part, enemy, &rv1, 0x1);
488 dir = rv1.direction;
489
490 /* hm, not sure about this part - in original was a scared flag here too
491 * but that we test above... so can be old code here
492 */
493 if (QUERY_FLAG (op, FLAG_RUN_AWAY))
494 dir = absdir (dir + 4);
495 if (QUERY_FLAG (op, FLAG_CONFUSED))
496 dir = absdir (dir + rndm (3) + rndm (3) - 2);
497
498 if (QUERY_FLAG (op, FLAG_CAST_SPELL) && !(rndm (3)))
499 {
500 if (monster_cast_spell (op, part, enemy, dir, &rv1))
501 return 0;
502 }
503
504 if (QUERY_FLAG (op, FLAG_READY_SCROLL) && !(rndm (3)))
505 {
506 if (monster_use_scroll (op, part, enemy, dir, &rv1))
507 return 0;
508 }
509
510 if (QUERY_FLAG (op, FLAG_READY_RANGE) && !(rndm (3)))
511 {
512 if (monster_use_range (op, part, enemy, dir))
513 return 0;
514 }
515 if (QUERY_FLAG (op, FLAG_READY_SKILL) && !(rndm (3)))
516 {
517 if (monster_use_skill (op, rv.part, enemy, rv.direction))
518 return 0;
519 }
520 if (QUERY_FLAG (op, FLAG_READY_BOW) && !(rndm (2)))
521 {
522 if (monster_use_bow (op, part, enemy, dir))
523 return 0;
524 }
525 } /* for processing of all parts */
526 } /* If not scared */
527
528
529 part = rv.part;
530 dir = rv.direction;
531
532 if (QUERY_FLAG (op, FLAG_SCARED) || QUERY_FLAG (op, FLAG_RUN_AWAY))
533 dir = absdir (dir + 4);
534
535 if (QUERY_FLAG (op, FLAG_CONFUSED))
536 dir = absdir (dir + rndm (3) + rndm (3) - 2);
537
538 pre_att_dir = dir; /* remember the original direction */
539
540 if ((op->attack_movement & LO4) && !QUERY_FLAG (op, FLAG_SCARED))
541 {
542 switch (op->attack_movement & LO4)
543 {
544 case DISTATT: 436 case TRIGGER:
545 dir = dist_att (dir, op, enemy, part, &rv); 437 if (monster->will_apply & 1)
438 manual_apply (monster, tmp, 0);
546 break; 439 break;
547 440
548 case RUNATT: 441 case TREASURE:
549 dir = run_att (dir, op, enemy, part, &rv); 442 if (monster->will_apply & 2)
443 manual_apply (monster, tmp, 0);
550 break; 444 break;
551 445
552 case HITRUN:
553 dir = hitrun_att (dir, op, enemy);
554 break;
555
556 case WAITATT:
557 dir = wait_att (dir, op, enemy, part, &rv);
558 break;
559
560 case RUSH: /* default - monster normally moves towards player */
561 case ALLRUN:
562 break;
563
564 case DISTHIT:
565 dir = disthit_att (dir, op, enemy, part, &rv);
566 break;
567
568 case WAIT2:
569 dir = wait_att2 (dir, op, enemy, part, &rv);
570 break;
571
572 default:
573 LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
574 }
575 }
576
577 if (!dir)
578 return 0;
579
580 if (!QUERY_FLAG (op, FLAG_STAND_STILL))
581 {
582 if (move_object (op, dir)) /* Can the monster move directly toward player? */
583 { 446 }
584 /* elmex: Turn our monster after it moved if it has DISTATT attack */ 447 if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
585 if ((op->attack_movement & LO4) == DISTATT) 448 break;
586 op->direction = pre_att_dir;
587
588 return 0;
589 }
590
591 if (QUERY_FLAG (op, FLAG_SCARED) || !can_hit (part, enemy, &rv) || QUERY_FLAG (op, FLAG_RUN_AWAY))
592 {
593
594 /* Try move around corners if !close */
595 int maxdiff = (QUERY_FLAG (op, FLAG_ONLY_ATTACK) || RANDOM () & 1) ? 1 : 2;
596
597 for (diff = 1; diff <= maxdiff; diff++)
598 {
599 /* try different detours */
600 int m = 1 - (RANDOM () & 2); /* Try left or right first? */
601
602 if (move_object (op, absdir (dir + diff * m)) || move_object (op, absdir (dir - diff * m)))
603 return 0;
604 }
605 }
606 } /* if monster is not standing still */
607
608 /* elmex: Turn our monster after it moved if it has DISTATT attack */
609 if ((op->attack_movement & LO4) == DISTATT)
610 op->direction = pre_att_dir;
611
612 /*
613 * Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
614 * direction if they can't move away.
615 */
616 if (!QUERY_FLAG (op, FLAG_ONLY_ATTACK) && (QUERY_FLAG (op, FLAG_RUN_AWAY) || QUERY_FLAG (op, FLAG_SCARED)))
617 if (move_randomly (op))
618 return 0;
619
620 /*
621 * Try giving the monster a new enemy - the player that is closest
622 * to it. In this way, it won't just keep trying to get to a target
623 * that is inaccessible.
624 * This could be more clever - it should go through a list of several
625 * enemies, as it is now, you could perhaps get situations where there
626 * are two players flanking the monster at close distance, but which
627 * the monster can't get to, and a third one at a far distance that
628 * the monster could get to - as it is, the monster won't look at that
629 * third one.
630 */
631 if (!QUERY_FLAG (op, FLAG_FRIENDLY) && enemy == op->enemy)
632 { 449 }
633 object *nearest_player = get_nearest_player (op);
634
635 if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
636 {
637 op->enemy = NULL;
638 enemy = nearest_player;
639 }
640 }
641
642 if (!QUERY_FLAG (op, FLAG_SCARED) && can_hit (part, enemy, &rv))
643 {
644 /* The adjustement to wc that was here before looked totally bogus -
645 * since wc can in fact get negative, that would mean by adding
646 * the current wc, the creature gets better? Instead, just
647 * add a fixed amount - nasty creatures that are runny away should
648 * still be pretty nasty.
649 */
650 if (QUERY_FLAG (op, FLAG_RUN_AWAY))
651 {
652 part->stats.wc += 10;
653 (void) skill_attack (enemy, part, 0, NULL, NULL);
654 part->stats.wc -= 10;
655 }
656 else
657 (void) skill_attack (enemy, part, 0, NULL, NULL);
658 } /* if monster is in attack range */
659
660 if (QUERY_FLAG (part, FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
661 return 1;
662
663 if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
664 {
665 op->remove ();
666 op->destroy ();
667 return 1;
668 }
669 return 0;
670}
671
672int
673can_hit (object *ob1, object *ob2, rv_vector * rv)
674{
675 object *more;
676 rv_vector rv1;
677
678 if (QUERY_FLAG (ob1, FLAG_CONFUSED) && !(rndm (3)))
679 return 0;
680
681 if (abs (rv->distance_x) < 2 && abs (rv->distance_y) < 2)
682 return 1;
683
684 /* check all the parts of ob2 - just because we can't get to
685 * its head doesn't mean we don't want to pound its feet
686 */
687 for (more = ob2->more; more != NULL; more = more->more)
688 {
689 get_rangevector (ob1, more, &rv1, 0);
690 if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
691 return 1;
692 }
693 return 0;
694
695} 450}
696 451
697/* Returns 1 is monster should cast spell sp at an enemy 452/* Returns 1 is monster should cast spell sp at an enemy
698 * Returns 0 if the monster should not cast this spell. 453 * Returns 0 if the monster should not cast this spell.
699 * 454 *
… …
707 * 462 *
708 * This could be a lot smarter - if there are few monsters around, 463 * This could be a lot smarter - if there are few monsters around,
709 * then disease might not be as bad. Likewise, if the monster is damaged, 464 * then disease might not be as bad. Likewise, if the monster is damaged,
710 * the right type of healing spell could be useful. 465 * the right type of healing spell could be useful.
711 */ 466 */
712
713static int 467static int
714monster_should_cast_spell (object *monster, object *spell_ob) 468monster_should_cast_spell (object *monster, object *spell_ob)
715{ 469{
716 if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET || 470 if (spell_ob->subtype == SP_BOLT || spell_ob->subtype == SP_BULLET ||
717 spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE || 471 spell_ob->subtype == SP_EXPLOSION || spell_ob->subtype == SP_CONE ||
718 spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE || 472 spell_ob->subtype == SP_BOMB || spell_ob->subtype == SP_SMITE ||
719 spell_ob->subtype == SP_MAGIC_MISSILE || spell_ob->subtype == SP_SUMMON_GOLEM || 473 spell_ob->subtype == SP_MAGIC_MISSILE || spell_ob->subtype == SP_SUMMON_GOLEM ||
720 spell_ob->subtype == SP_MAGIC_WALL || spell_ob->subtype == SP_SUMMON_MONSTER || 474 spell_ob->subtype == SP_MAGIC_WALL || spell_ob->subtype == SP_SUMMON_MONSTER ||
721 spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE) 475 spell_ob->subtype == SP_MOVING_BALL || spell_ob->subtype == SP_SWARM || spell_ob->subtype == SP_INVISIBLE)
722
723 return 1; 476 return 1;
724 477
725 return 0; 478 return 0;
726} 479}
727 480
728
729#define MAX_KNOWN_SPELLS 20
730
731/* Returns a randomly selected spell. This logic is still
732 * less than ideal. This code also only seems to deal with
733 * wizard spells, as the check is against sp, and not grace.
734 * can mosnters know cleric spells?
735 */
736object *
737monster_choose_random_spell (object *monster)
738{
739 object *altern[MAX_KNOWN_SPELLS];
740 object *tmp;
741 int i = 0;
742
743 for (tmp = monster->inv; tmp != NULL; tmp = tmp->below)
744 if (tmp->type == SPELLBOOK || tmp->type == SPELL)
745 {
746 /* Check and see if it's actually a useful spell.
747 * If its a spellbook, the spell is actually the inventory item.
748 * if it is a spell, then it is just the object itself.
749 */
750 if (monster_should_cast_spell (monster, (tmp->type == SPELLBOOK) ? tmp->inv : tmp))
751 {
752 altern[i++] = tmp;
753 if (i == MAX_KNOWN_SPELLS)
754 break;
755 }
756 }
757 if (!i)
758 return NULL;
759 return altern[RANDOM () % i];
760}
761
762/* This checks to see if the monster should cast a spell/ability.
763 * it returns true if the monster casts a spell, 0 if he doesn't.
764 * head is the head of the monster.
765 * part is the part of the monster we are checking against.
766 * pl is the target.
767 * dir is the direction to case.
768 * rv is the vector which describes where the enemy is.
769 */
770
771int
772monster_cast_spell (object *head, object *part, object *pl, int dir, rv_vector * rv)
773{
774 object *spell_item;
775 object *owner;
776 rv_vector rv1;
777
778 /* If you want monsters to cast spells over friends, this spell should
779 * be removed. It probably should be in most cases, since monsters still
780 * don't care about residual effects (ie, casting a cone which may have a
781 * clear path to the player, the side aspects of the code will still hit
782 * other monsters)
783 */
784 if (!(dir = path_to_player (part, pl, 0)))
785 return 0;
786
787 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
788 {
789 get_rangevector (head, owner, &rv1, 0x1);
790 if (dirdiff (dir, rv1.direction) < 2)
791 {
792 return 0; /* Might hit owner with spell */
793 }
794 }
795
796 if (QUERY_FLAG (head, FLAG_CONFUSED))
797 dir = absdir (dir + rndm (3) + rndm (3) - 2);
798
799 /* If the monster hasn't already chosen a spell, choose one
800 * I'm not sure if it really make sense to pre-select spells (events
801 * could be different by the time the monster goes again).
802 */
803 if (head->spellitem == NULL)
804 {
805 if ((spell_item = monster_choose_random_spell (head)) == NULL)
806 {
807 LOG (llevMonster, "Turned off spells in %s\n", &head->name);
808 CLEAR_FLAG (head, FLAG_CAST_SPELL); /* Will be turned on when picking up book */
809 return 0;
810 }
811 if (spell_item->type == SPELLBOOK)
812 {
813 if (!spell_item->inv)
814 {
815 LOG (llevError, "spellbook %s does not contain a spell?\n", &spell_item->name);
816 return 0;
817 }
818 spell_item = spell_item->inv;
819 }
820 }
821 else
822 spell_item = head->spellitem;
823
824 if (!spell_item)
825 return 0;
826
827 /* Best guess this is a defensive/healing spell */
828 if (spell_item->range <= 1 || spell_item->stats.dam < 0)
829 dir = 0;
830
831 /* Monster doesn't have enough spell-points */
832 if (head->stats.sp < SP_level_spellpoint_cost (head, spell_item, SPELL_MANA))
833 return 0;
834
835 if (head->stats.grace < SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE))
836 return 0;
837
838 head->stats.sp -= SP_level_spellpoint_cost (head, spell_item, SPELL_MANA);
839 head->stats.grace -= SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE);
840
841 /* set this to null, so next time monster will choose something different */
842 head->spellitem = NULL;
843
844 return cast_spell (part, part, dir, spell_item, NULL);
845}
846
847
848int
849monster_use_scroll (object *head, object *part, object *pl, int dir, rv_vector * rv)
850{
851 object *scroll;
852 object *owner;
853 rv_vector rv1;
854
855 /* If you want monsters to cast spells over friends, this spell should
856 * be removed. It probably should be in most cases, since monsters still
857 * don't care about residual effects (ie, casting a cone which may have a
858 * clear path to the player, the side aspects of the code will still hit
859 * other monsters)
860 */
861 if (!(dir = path_to_player (part, pl, 0)))
862 return 0;
863
864 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
865 {
866 get_rangevector (head, owner, &rv1, 0x1);
867 if (dirdiff (dir, rv1.direction) < 2)
868 {
869 return 0; /* Might hit owner with spell */
870 }
871 }
872
873 if (QUERY_FLAG (head, FLAG_CONFUSED))
874 dir = absdir (dir + rndm (3) + rndm (3) - 2);
875
876 for (scroll = head->inv; scroll; scroll = scroll->below)
877 if (scroll->type == SCROLL && monster_should_cast_spell (head, scroll->inv))
878 break;
879
880 /* Used up all his scrolls, so nothing do to */
881 if (!scroll)
882 {
883 CLEAR_FLAG (head, FLAG_READY_SCROLL);
884 return 0;
885 }
886
887 /* Spell should be cast on caster (ie, heal, strength) */
888 if (scroll->inv->range == 0)
889 dir = 0;
890
891 apply_scroll (part, scroll, dir);
892 return 1;
893}
894
895/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.
896 * Note that monsters do not need the skills SK_MELEE_WEAPON and
897 * SK_MISSILE_WEAPON to make those respective attacks, if we
898 * required that we would drastically increase the memory
899 * requirements of CF!!
900 *
901 * The skills we are treating here are all but those. -b.t.
902 *
903 * At the moment this is only useful for throwing, perhaps for
904 * stealing. TODO: This should be more integrated in the game. -MT, 25.11.01
905 */
906int
907monster_use_skill (object *head, object *part, object *pl, int dir)
908{
909 object *skill, *owner;
910
911 if (!(dir = path_to_player (part, pl, 0)))
912 return 0;
913
914 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
915 {
916 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
917
918 if (dirdiff (dir, dir2) < 1)
919 return 0; /* Might hit owner with skill -thrown rocks for example ? */
920 }
921
922 if (QUERY_FLAG (head, FLAG_CONFUSED))
923 dir = absdir (dir + rndm (3) + rndm (3) - 2);
924
925 /* skill selection - monster will use the next unused skill.
926 * well...the following scenario will allow the monster to
927 * toggle between 2 skills. One day it would be nice to make
928 * more skills available to monsters.
929 */
930 for (skill = head->inv; skill; skill = skill->below)
931 if (skill->type == SKILL && skill != head->chosen_skill)
932 {
933 head->chosen_skill = skill;
934 break;
935 }
936
937 if (!skill && !head->chosen_skill)
938 {
939 LOG (llevDebug, "Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n", &head->name, head->count);
940 CLEAR_FLAG (head, FLAG_READY_SKILL);
941 return 0;
942 }
943
944 /* use skill */
945 return do_skill (head, part, head->chosen_skill, dir, NULL);
946}
947
948/* Monster will use a ranged spell attack. */
949int
950monster_use_range (object *head, object *part, object *pl, int dir)
951{
952 object *wand, *owner;
953 int at_least_one = 0;
954
955 if (!(dir = path_to_player (part, pl, 0)))
956 return 0;
957
958 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
959 {
960 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
961
962 if (dirdiff (dir, dir2) < 2)
963 return 0; /* Might hit owner with spell */
964 }
965 if (QUERY_FLAG (head, FLAG_CONFUSED))
966 dir = absdir (dir + rndm (3) + rndm (3) - 2);
967
968 for (wand = head->inv; wand; wand = wand->below)
969 {
970 if (wand->type == WAND)
971 {
972 /* Found a wand, let's see if it has charges left */
973 at_least_one = 1;
974 if (wand->stats.food <= 0)
975 continue;
976
977 cast_spell (head, wand, dir, wand->inv, NULL);
978
979 if (!(--wand->stats.food))
980 {
981 if (wand->arch)
982 {
983 CLEAR_FLAG (wand, FLAG_ANIMATE);
984 wand->face = wand->arch->clone.face;
985 wand->set_speed (0);
986 }
987 }
988 /* Success */
989 return 1;
990 }
991 else if (wand->type == ROD || wand->type == HORN)
992 {
993 /* Found rod/horn, let's use it if possible */
994 at_least_one = 1;
995 if (wand->stats.hp < MAX (wand->inv->stats.sp, wand->inv->stats.grace))
996 continue;
997
998 /* drain charge before casting spell - can be a case where the
999 * spell destroys the monster, and rod, so if done after, results
1000 * in crash.
1001 */
1002 drain_rod_charge (wand);
1003 cast_spell (head, wand, dir, wand->inv, NULL);
1004
1005 /* Success */
1006 return 1;
1007 }
1008 }
1009
1010 if (at_least_one)
1011 return 0;
1012
1013 LOG (llevError, "Error: Monster %s (%d) HAS_READY_RANG() without wand/horn/rod.\n", &head->name, head->count);
1014 CLEAR_FLAG (head, FLAG_READY_RANGE);
1015 return 0;
1016}
1017
1018int
1019monster_use_bow (object *head, object *part, object *pl, int dir)
1020{
1021 object *owner;
1022
1023 if (!(dir = path_to_player (part, pl, 0)))
1024 return 0;
1025 if (QUERY_FLAG (head, FLAG_CONFUSED))
1026 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1027
1028 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
1029 {
1030 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
1031
1032 if (dirdiff (dir, dir2) < 1)
1033 return 0; /* Might hit owner with arrow */
1034 }
1035
1036 /* in server/player.c */
1037 return fire_bow (head, part, NULL, dir, 0, part->x, part->y);
1038
1039}
1040
1041/* Checks if putting on 'item' will make 'who' do more 481/* Checks if putting on 'item' will make 'who' do more
1042 * damage. This is a very simplistic check - also checking things 482 * damage. This is a very simplistic check - also checking things
1043 * like speed and ac are also relevant. 483 * like speed and ac are also relevant.
1044 * 484 *
1045 * return true if item is a better object. 485 * return true if item is a better object.
1046 */ 486 */
1047 487static int
1048int
1049check_good_weapon (object *who, object *item) 488check_good_weapon (object *who, object *item)
1050{ 489{
1051 object *other_weap; 490 object *other_weap;
1052 int val = 0, i; 491 int val = 0, i;
1053 492
1054 for (other_weap = who->inv; other_weap != NULL; other_weap = other_weap->below) 493 for (other_weap = who->inv; other_weap; other_weap = other_weap->below)
1055 if (other_weap->type == item->type && QUERY_FLAG (other_weap, FLAG_APPLIED)) 494 if (other_weap->type == item->type && QUERY_FLAG (other_weap, FLAG_APPLIED))
1056 break; 495 break;
1057 496
1058 if (other_weap == NULL) /* No other weapons */ 497 if (!other_weap) /* No other weapons */
1059 return 1; 498 return 1;
1060 499
1061 /* Rather than go through and apply the new one, and see if it is 500 /* Rather than go through and apply the new one, and see if it is
1062 * better, just do some simple checks 501 * better, just do some simple checks
1063 * Put some multipliers for things that hvae several effects, 502 * Put some multipliers for things that hvae several effects,
… …
1068 val += (item->magic - other_weap->magic) * 3; 507 val += (item->magic - other_weap->magic) * 3;
1069 /* Monsters don't really get benefits from things like regen rates 508 /* Monsters don't really get benefits from things like regen rates
1070 * from items. But the bonus for their stats are very important. 509 * from items. But the bonus for their stats are very important.
1071 */ 510 */
1072 for (i = 0; i < NUM_STATS; i++) 511 for (i = 0; i < NUM_STATS; i++)
1073 val += (get_attr_value (&item->stats, i) - get_attr_value (&other_weap->stats, i)) * 2; 512 val += item->stats.stat (i) - other_weap->stats.stat (i) * 2;
1074 513
1075 if (val > 0) 514 if (val > 0)
1076 return 1; 515 return 1;
1077 else 516 else
1078 return 0; 517 return 0;
1079} 518}
1080 519
1081int 520static int
1082check_good_armour (object *who, object *item) 521check_good_armour (object *who, object *item)
1083{ 522{
1084 object *other_armour; 523 object *other_armour;
1085 int val = 0, i; 524 int val = 0, i;
1086 525
1087 for (other_armour = who->inv; other_armour != NULL; other_armour = other_armour->below) 526 for (other_armour = who->inv; other_armour; other_armour = other_armour->below)
1088 if (other_armour->type == item->type && QUERY_FLAG (other_armour, FLAG_APPLIED)) 527 if (other_armour->type == item->type && QUERY_FLAG (other_armour, FLAG_APPLIED))
1089 break; 528 break;
1090 529
1091 if (other_armour == NULL) /* No other armour, use the new */ 530 if (other_armour == NULL) /* No other armour, use the new */
1092 return 1; 531 return 1;
… …
1114 553
1115 if (val > 0) 554 if (val > 0)
1116 return 1; 555 return 1;
1117 else 556 else
1118 return 0; 557 return 0;
1119}
1120
1121/*
1122 * monster_check_pickup(): checks for items that monster can pick up.
1123 *
1124 * Vick's (vick@bern.docs.uu.se) fix 921030 for the sweeper blob.
1125 * Each time the blob passes over some treasure, it will
1126 * grab it a.s.a.p.
1127 *
1128 * Eneq(@csd.uu.se): This can now be defined in the archetypes, added code
1129 * to handle this.
1130 *
1131 * This function was seen be continueing looping at one point (tmp->below
1132 * became a recursive loop. It may be better to call monster_check_apply
1133 * after we pick everything up, since that function may call others which
1134 * affect stacking on this space.
1135 */
1136void
1137monster_check_pickup (object *monster)
1138{
1139 object *tmp, *next;
1140
1141 for (tmp = monster->below; tmp != NULL; tmp = next)
1142 {
1143 next = tmp->below;
1144 if (monster_can_pick (monster, tmp))
1145 {
1146 tmp->remove ();
1147 tmp = insert_ob_in_ob (tmp, monster);
1148 (void) monster_check_apply (monster, tmp);
1149 }
1150 /* We could try to re-establish the cycling, of the space, but probably
1151 * not a big deal to just bail out.
1152 */
1153 if (next && next->destroyed ())
1154 return;
1155 }
1156}
1157
1158/*
1159 * monster_can_pick(): If the monster is interested in picking up
1160 * the item, then return 0. Otherwise 0.
1161 * Instead of pick_up, flags for "greed", etc, should be used.
1162 * I've already utilized flags for bows, wands, rings, etc, etc. -Frank.
1163 */
1164int
1165monster_can_pick (object *monster, object *item)
1166{
1167 int flag = 0;
1168 int i;
1169
1170 if (!can_pick (monster, item))
1171 return 0;
1172
1173 if (QUERY_FLAG (item, FLAG_UNPAID))
1174 return 0;
1175
1176 if (monster->pick_up & 64) /* All */
1177 flag = 1;
1178
1179 else
1180 switch (item->type)
1181 {
1182 case MONEY:
1183 case GEM:
1184 flag = monster->pick_up & 2;
1185 break;
1186
1187 case FOOD:
1188 flag = monster->pick_up & 4;
1189 break;
1190
1191 case WEAPON:
1192 flag = (monster->pick_up & 8) || QUERY_FLAG (monster, FLAG_USE_WEAPON);
1193 break;
1194
1195 case ARMOUR:
1196 case SHIELD:
1197 case HELMET:
1198 case BOOTS:
1199 case GLOVES:
1200 case GIRDLE:
1201 flag = (monster->pick_up & 16) || QUERY_FLAG (monster, FLAG_USE_ARMOUR);
1202 break;
1203
1204 case SKILL:
1205 flag = QUERY_FLAG (monster, FLAG_CAN_USE_SKILL);
1206 break;
1207
1208 case RING:
1209 flag = QUERY_FLAG (monster, FLAG_USE_RING);
1210 break;
1211
1212 case WAND:
1213 case HORN:
1214 case ROD:
1215 flag = QUERY_FLAG (monster, FLAG_USE_RANGE);
1216 break;
1217
1218 case SPELLBOOK:
1219 flag = (monster->arch != NULL && QUERY_FLAG ((&monster->arch->clone), FLAG_CAST_SPELL));
1220 break;
1221
1222 case SCROLL:
1223 flag = QUERY_FLAG (monster, FLAG_USE_SCROLL);
1224 break;
1225
1226 case BOW:
1227 case ARROW:
1228 flag = QUERY_FLAG (monster, FLAG_USE_BOW);
1229 break;
1230 }
1231
1232 /* Simplistic check - if the monster has a location to equip it, he will
1233 * pick it up. Note that this doesn't handle cases where an item may
1234 * use several locations.
1235 */
1236 for (i = 0; i < NUM_BODY_LOCATIONS; i++)
1237 {
1238 if (monster->body_info[i] && item->body_info[i])
1239 {
1240 flag = 1;
1241 break;
1242 }
1243 }
1244
1245 if (((!(monster->pick_up & 32)) && flag) || ((monster->pick_up & 32) && (!flag)))
1246 return 1;
1247 return 0;
1248}
1249
1250/*
1251 * monster_apply_below():
1252 * Vick's (vick@bern.docs.uu.se) @921107 -> If a monster who's
1253 * eager to apply things, encounters something apply-able,
1254 * then make him apply it
1255 */
1256void
1257monster_apply_below (object *monster)
1258{
1259 object *tmp, *next;
1260
1261 for (tmp = monster->below; tmp != NULL; tmp = next)
1262 {
1263 next = tmp->below;
1264 switch (tmp->type)
1265 {
1266 case CF_HANDLE:
1267 case TRIGGER:
1268 if (monster->will_apply & 1)
1269 manual_apply (monster, tmp, 0);
1270 break;
1271
1272 case TREASURE:
1273 if (monster->will_apply & 2)
1274 manual_apply (monster, tmp, 0);
1275 break;
1276
1277 }
1278 if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
1279 break;
1280 }
1281} 558}
1282 559
1283/* 560/*
1284 * monster_check_apply() is meant to be called after an item is 561 * monster_check_apply() is meant to be called after an item is
1285 * inserted in a monster. 562 * inserted in a monster.
… …
1293void 570void
1294monster_check_apply (object *mon, object *item) 571monster_check_apply (object *mon, object *item)
1295{ 572{
1296 int flag = 0; 573 int flag = 0;
1297 574
1298 if (item->type == SPELLBOOK && mon->arch && (QUERY_FLAG ((&mon->arch->clone), FLAG_CAST_SPELL))) 575 if (item->type == SPELLBOOK && mon->arch && (QUERY_FLAG (mon->arch, FLAG_CAST_SPELL)))
1299 { 576 {
1300 SET_FLAG (mon, FLAG_CAST_SPELL); 577 SET_FLAG (mon, FLAG_CAST_SPELL);
1301 return; 578 return;
1302 } 579 }
1303 580
… …
1396 * monsters have some advantages after all. 673 * monsters have some advantages after all.
1397 */ 674 */
1398 manual_apply (mon, item, AP_APPLY | AP_IGNORE_CURSE); 675 manual_apply (mon, item, AP_APPLY | AP_IGNORE_CURSE);
1399} 676}
1400 677
1401void 678static int
1402npc_call_help (object *op) 679can_hit (object *ob1, object *ob2, rv_vector * rv)
1403{ 680{
1404 int x, y, mflags;
1405 object *npc; 681 object *more;
1406 sint16 sx, sy; 682 rv_vector rv1;
1407 maptile *m;
1408 683
1409 for (x = -3; x < 4; x++) 684 if (QUERY_FLAG (ob1, FLAG_CONFUSED) && !(rndm (3)))
1410 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)
1411 { 694 {
1412 m = op->map; 695 get_rangevector (ob1, more, &rv1, 0);
1413 sx = op->x + x; 696 if (abs (rv1.distance_x) < 2 && abs (rv1.distance_y) < 2)
1414 sy = op->y + y; 697 return 1;
1415 mflags = get_map_flags (m, &m, sx, sy, &sx, &sy);
1416 /* If nothing alive on this space, no need to search the space. */
1417 if ((mflags & P_OUT_OF_MAP) || !(mflags & P_IS_ALIVE))
1418 continue;
1419
1420 for (npc = GET_MAP_OB (m, sx, sy); npc != NULL; npc = npc->above)
1421 if (QUERY_FLAG (npc, FLAG_ALIVE) && QUERY_FLAG (npc, FLAG_UNAGGRESSIVE))
1422 npc->enemy = op->enemy;
1423 } 698 }
1424}
1425 699
1426int 700 return 0;
701}
702
703static int
1427dist_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)
1428{ 705{
1429 if (can_hit (part, enemy, rv)) 706 if (can_hit (part, enemy, rv))
1430 return dir; 707 return dir;
708
1431 if (rv->distance < 10) 709 if (rv->distance < 10)
1432 return absdir (dir + 4); 710 return absdir (dir + 4);
1433 else if (rv->distance > 18) 711 else if (rv->distance > 18)
1434 return dir; 712 return dir;
1435 713
1436 return 0; 714 return 0;
1437} 715}
1438 716
1439int 717static int
1440run_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)
1441{ 719{
1442 if ((can_hit (part, enemy, rv) && ob->move_status < 20) || ob->move_status < 20) 720 if (can_hit (part, enemy, rv))
1443 {
1444 ob->move_status++;
1445 return (dir); 721 return dir;
1446 } 722 else
1447 else if (ob->move_status > 20)
1448 ob->move_status = 0;
1449
1450 return absdir (dir + 4); 723 return absdir (dir + 4);
1451} 724}
1452 725
1453int 726static int
1454hitrun_att (int dir, object *ob, object *enemy) 727hitrun_att (int dir, object *ob, object *enemy)
1455{ 728{
1456 if (ob->move_status++ < 25) 729 if (ob->move_status++ < 25)
1457 return dir; 730 return dir;
1458 else if (ob->move_status < 50) 731 else if (ob->move_status < 50)
… …
1461 ob->move_status = 0; 734 ob->move_status = 0;
1462 735
1463 return absdir (dir + 4); 736 return absdir (dir + 4);
1464} 737}
1465 738
1466int 739static int
1467wait_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)
1468{ 741{
1469
1470 int inrange = can_hit (part, enemy, rv); 742 int inrange = can_hit (part, enemy, rv);
1471 743
1472 if (ob->move_status || inrange) 744 if (ob->move_status || inrange)
1473 ob->move_status++; 745 ob->move_status++;
1474 746
… …
1481 753
1482 ob->move_status = 0; 754 ob->move_status = 0;
1483 return 0; 755 return 0;
1484} 756}
1485 757
1486int 758static int
1487disthit_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)
1488{ 760{
1489
1490 /* The logic below here looked plain wrong before. Basically, what should 761 /* The logic below here looked plain wrong before. Basically, what should
1491 * 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,
1492 * the creature should run away (dir+4) 763 * the creature should run away (dir+4)
1493 * 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
1494 * 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
1495 * server should try to be resilant enough to avoid the problem 766 * server should try to be resilant enough to avoid the problem
1496 */ 767 */
1497 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)
1498 return absdir (dir + 4); 769 return absdir (dir + 4);
1499 770
1500 return dist_att (dir, ob, enemy, part, rv); 771 return dist_att (dir, ob, enemy, part, rv);
1501} 772}
1502 773
1503int 774static int
1504wait_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)
1505{ 776{
1506 if (rv->distance < 9) 777 if (rv->distance < 9)
1507 return absdir (dir + 4); 778 return absdir (dir + 4);
1508 779
1509 return 0; 780 return 0;
1510} 781}
1511 782
1512void 783static void
1513circ1_move (object *ob) 784circ1_move (object *ob)
1514{ 785{
1515 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 };
1516 787
1517 if (++ob->move_status > 11) 788 if (++ob->move_status > 11)
… …
1519 790
1520 if (!(move_object (ob, circle[ob->move_status]))) 791 if (!(move_object (ob, circle[ob->move_status])))
1521 move_object (ob, rndm (8) + 1); 792 move_object (ob, rndm (8) + 1);
1522} 793}
1523 794
1524void 795static void
1525circ2_move (object *ob) 796circ2_move (object *ob)
1526{ 797{
1527 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 };
1528 799
1529 if (++ob->move_status > 19) 800 if (++ob->move_status > 19)
… …
1531 802
1532 if (!(move_object (ob, circle[ob->move_status]))) 803 if (!(move_object (ob, circle[ob->move_status])))
1533 move_object (ob, rndm (8) + 1); 804 move_object (ob, rndm (8) + 1);
1534} 805}
1535 806
1536void 807static void
1537pace_movev (object *ob) 808pace_movev (object *ob)
1538{ 809{
1539 if (ob->move_status++ > 6) 810 if (ob->move_status++ > 6)
1540 ob->move_status = 0; 811 ob->move_status = 0;
1541 812
… …
1543 move_object (ob, 5); 814 move_object (ob, 5);
1544 else 815 else
1545 move_object (ob, 1); 816 move_object (ob, 1);
1546} 817}
1547 818
1548void 819static void
1549pace_moveh (object *ob) 820pace_moveh (object *ob)
1550{ 821{
1551 if (ob->move_status++ > 6) 822 if (ob->move_status++ > 6)
1552 ob->move_status = 0; 823 ob->move_status = 0;
1553 824
… …
1555 move_object (ob, 3); 826 move_object (ob, 3);
1556 else 827 else
1557 move_object (ob, 7); 828 move_object (ob, 7);
1558} 829}
1559 830
1560void 831static void
1561pace2_movev (object *ob) 832pace2_movev (object *ob)
1562{ 833{
1563 if (ob->move_status++ > 16) 834 if (ob->move_status++ > 16)
1564 ob->move_status = 0; 835 ob->move_status = 0;
1565 836
… …
1571 move_object (ob, 1); 842 move_object (ob, 1);
1572 else 843 else
1573 return; 844 return;
1574} 845}
1575 846
1576void 847static void
1577pace2_moveh (object *ob) 848pace2_moveh (object *ob)
1578{ 849{
1579 if (ob->move_status++ > 16) 850 if (ob->move_status++ > 16)
1580 ob->move_status = 0; 851 ob->move_status = 0;
1581 852
… …
1587 move_object (ob, 7); 858 move_object (ob, 7);
1588 else 859 else
1589 return; 860 return;
1590} 861}
1591 862
1592void 863static void
1593rand_move (object *ob) 864rand_move (object *ob)
1594{ 865{
1595 int i;
1596
1597 if (ob->move_status < 1 || ob->move_status > 8 || !(move_object (ob, ob->move_status || !(rndm (9))))) 866 if (ob->move_status < 1 || ob->move_status > 8 || !(move_object (ob, ob->move_status || !(rndm (9)))))
1598 for (i = 0; i < 5; i++) 867 for (int i = 0; i < 5; i++)
1599 if (move_object (ob, ob->move_status = rndm (8) + 1)) 868 if (move_object (ob, ob->move_status = rndm (8) + 1))
1600 return; 869 return;
1601} 870}
1602 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 (QUERY_FLAG (head, 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 (QUERY_FLAG (head, 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 LOG (llevMonster, "Turned off spells in %s\n", &head->name);
947 CLEAR_FLAG (head, FLAG_CAST_SPELL); /* Will be turned on when picking up book */
948 return 0;
949 }
950
951 if (spell_item->type == SPELLBOOK)
952 {
953 if (!spell_item->inv)
954 {
955 LOG (llevError, "spellbook %s does not contain a spell?\n", &spell_item->name);
956 return 0;
957 }
958
959 spell_item = spell_item->inv;
960 }
961 }
962 else
963 spell_item = head->spellitem;
964
965 if (!spell_item)
966 return 0;
967
968 /* Best guess this is a defensive/healing spell */
969 if (spell_item->range <= 1 || spell_item->stats.dam < 0)
970 dir = 0;
971
972 /* Monster doesn't have enough spell-points */
973 if (head->stats.sp < SP_level_spellpoint_cost (head, spell_item, SPELL_MANA))
974 return 0;
975
976 if (head->stats.grace < SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE))
977 return 0;
978
979 head->stats.sp -= SP_level_spellpoint_cost (head, spell_item, SPELL_MANA);
980 head->stats.grace -= SP_level_spellpoint_cost (head, spell_item, SPELL_GRACE);
981
982 /* set this to null, so next time monster will choose something different */
983 head->spellitem = NULL;
984
985 return cast_spell (part, part, dir, spell_item, NULL);
986}
987
988static int
989monster_use_scroll (object *head, object *part, object *pl, int dir, rv_vector * rv)
990{
991 object *scroll;
992 object *owner;
993 rv_vector rv1;
994
995 /* If you want monsters to cast spells over friends, this spell should
996 * be removed. It probably should be in most cases, since monsters still
997 * don't care about residual effects (ie, casting a cone which may have a
998 * clear path to the player, the side aspects of the code will still hit
999 * other monsters)
1000 */
1001 if (!(dir = path_to_player (part, pl, 0)))
1002 return 0;
1003
1004 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
1005 {
1006 get_rangevector (head, owner, &rv1, 0x1);
1007 if (dirdiff (dir, rv1.direction) < 2)
1008 {
1009 return 0; /* Might hit owner with spell */
1010 }
1011 }
1012
1013 if (QUERY_FLAG (head, FLAG_CONFUSED))
1014 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1015
1016 for (scroll = head->inv; scroll; scroll = scroll->below)
1017 if (scroll->type == SCROLL && monster_should_cast_spell (head, scroll->inv))
1018 break;
1019
1020 /* Used up all his scrolls, so nothing do to */
1021 if (!scroll)
1022 {
1023 CLEAR_FLAG (head, FLAG_READY_SCROLL);
1024 return 0;
1025 }
1026
1027 /* Spell should be cast on caster (ie, heal, strength) */
1028 if (scroll->inv->range == 0)
1029 dir = 0;
1030
1031 apply_scroll (part, scroll, dir);
1032 return 1;
1033}
1034
1035/* monster_use_skill()-implemented 95-04-28 to allow monster skill use.
1036 * Note that monsters do not need the skills SK_MELEE_WEAPON and
1037 * SK_MISSILE_WEAPON to make those respective attacks, if we
1038 * required that we would drastically increase the memory
1039 * requirements of CF!!
1040 *
1041 * The skills we are treating here are all but those. -b.t.
1042 *
1043 * At the moment this is only useful for throwing, perhaps for
1044 * stealing. TODO: This should be more integrated in the game. -MT, 25.11.01
1045 */
1046static int
1047monster_use_skill (object *head, object *part, object *pl, int dir)
1048{
1049 object *skill, *owner;
1050
1051 if (!(dir = path_to_player (part, pl, 0)))
1052 return 0;
1053
1054 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
1055 {
1056 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
1057
1058 if (dirdiff (dir, dir2) < 1)
1059 return 0; /* Might hit owner with skill -thrown rocks for example ? */
1060 }
1061
1062 if (QUERY_FLAG (head, FLAG_CONFUSED))
1063 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1064
1065 /* skill selection - monster will use the next unused skill.
1066 * well...the following scenario will allow the monster to
1067 * toggle between 2 skills. One day it would be nice to make
1068 * more skills available to monsters.
1069 */
1070 for (skill = head->inv; skill; skill = skill->below)
1071 if (skill->type == SKILL && skill != head->chosen_skill)
1072 {
1073 head->chosen_skill = skill;
1074 break;
1075 }
1076
1077 if (!skill && !head->chosen_skill)
1078 {
1079 LOG (llevDebug, "Error: Monster %s (%d) has FLAG_READY_SKILL without skill.\n", &head->name, head->count);
1080 CLEAR_FLAG (head, FLAG_READY_SKILL);
1081 return 0;
1082 }
1083
1084 /* use skill */
1085 return do_skill (head, part, head->chosen_skill, dir, NULL);
1086}
1087
1088/* Monster will use a ranged spell attack. */
1089static int
1090monster_use_range (object *head, object *part, object *pl, int dir)
1091{
1092 object *wand, *owner;
1093 int at_least_one = 0;
1094
1095 if (!(dir = path_to_player (part, pl, 0)))
1096 return 0;
1097
1098 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
1099 {
1100 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
1101
1102 if (dirdiff (dir, dir2) < 2)
1103 return 0; /* Might hit owner with spell */
1104 }
1105
1106 if (QUERY_FLAG (head, FLAG_CONFUSED))
1107 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1108
1109 for (wand = head->inv; wand; wand = wand->below)
1110 {
1111 if (wand->type == WAND)
1112 {
1113 /* Found a wand, let's see if it has charges left */
1114 at_least_one = 1;
1115 if (wand->stats.food <= 0)
1116 continue;
1117
1118 cast_spell (head, wand, dir, wand->inv, NULL);
1119
1120 if (!(--wand->stats.food))
1121 {
1122 if (wand->arch)
1123 {
1124 CLEAR_FLAG (wand, FLAG_ANIMATE);
1125 wand->face = wand->arch->face;
1126 wand->set_speed (0);
1127 }
1128 }
1129 /* Success */
1130 return 1;
1131 }
1132 else if (wand->type == ROD || wand->type == HORN)
1133 {
1134 /* Found rod/horn, let's use it if possible */
1135 at_least_one = 1;
1136 if (wand->stats.hp < max (wand->inv->stats.sp, wand->inv->stats.grace))
1137 continue;
1138
1139 /* drain charge before casting spell - can be a case where the
1140 * spell destroys the monster, and rod, so if done after, results
1141 * in crash.
1142 */
1143 drain_rod_charge (wand);
1144 cast_spell (head, wand, dir, wand->inv, NULL);
1145
1146 /* Success */
1147 return 1;
1148 }
1149 }
1150
1151 if (at_least_one)
1152 return 0;
1153
1154 LOG (llevError, "Error: Monster %s (%d) HAS_READY_RANGE() without wand/horn/rod.\n", &head->name, head->count);
1155 CLEAR_FLAG (head, FLAG_READY_RANGE);
1156 return 0;
1157}
1158
1159static int
1160monster_use_bow (object *head, object *part, object *pl, int dir)
1161{
1162 object *owner;
1163
1164 if (!(dir = path_to_player (part, pl, 0)))
1165 return 0;
1166
1167 if (QUERY_FLAG (head, FLAG_CONFUSED))
1168 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1169
1170 if (QUERY_FLAG (head, FLAG_FRIENDLY) && (owner = head->owner) != NULL)
1171 {
1172 int dir2 = find_dir_2 (head->x - owner->x, head->y - owner->y);
1173
1174 if (dirdiff (dir, dir2) < 1)
1175 return 0; /* Might hit owner with arrow */
1176 }
1177
1178 /* in server/player.c */
1179 return fire_bow (head, part, NULL, dir, 0, part->x, part->y);
1180
1181}
1182
1183void
1184npc_call_help (object *op)
1185{
1186 unordered_mapwalk (mapwalk_buf, op, -7, -7, 7, 7)
1187 {
1188 mapspace &ms = m->at (nx, ny);
1189
1190 /* If nothing alive on this space, no need to search the space. */
1191 if (!(ms.flags () & P_IS_ALIVE))
1192 continue;
1193
1194 for (object *npc = ms.bot; npc; npc = npc->above)
1195 if (QUERY_FLAG (npc, FLAG_ALIVE) && QUERY_FLAG (npc, FLAG_UNAGGRESSIVE))
1196 npc->enemy = op->enemy;
1197 }
1198}
1199
1603void 1200void
1604check_earthwalls (object *op, maptile *m, int x, int y) 1201check_earthwalls (object *op, maptile *m, int x, int y)
1605{ 1202{
1606 object *tmp;
1607
1608 for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above) 1203 for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1609 {
1610 if (tmp->type == EARTHWALL) 1204 if (tmp->type == EARTHWALL)
1611 { 1205 {
1612 hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1); 1206 hit_player (tmp, op->stats.dam, op, AT_PHYSICAL, 1);
1613 return; 1207 return;
1614 } 1208 }
1615 }
1616} 1209}
1617 1210
1618void 1211void
1619check_doors (object *op, maptile *m, int x, int y) 1212check_doors (object *op, maptile *m, int x, int y)
1620{ 1213{
1621 object *tmp;
1622
1623 for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above) 1214 for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
1624 {
1625 if (tmp->type == DOOR) 1215 if (tmp->type == DOOR)
1626 { 1216 {
1627 hit_player (tmp, 1000, op, AT_PHYSICAL, 1); 1217 hit_player (tmp, 1000, op, AT_PHYSICAL, 1);
1628 return; 1218 return;
1629 } 1219 }
1630 }
1631} 1220}
1632 1221
1633/* find_mon_throw_ob() - modeled on find_throw_ob 1222/* find_mon_throw_ob() - modeled on find_throw_ob
1634 * This is probably overly simplistic as it is now - We want 1223 * This is probably overly simplistic as it is now - We want
1635 * monsters to throw things like chairs and other pieces of 1224 * monsters to throw things like chairs and other pieces of
… …
1666#endif 1255#endif
1667 1256
1668 return tmp; 1257 return tmp;
1669} 1258}
1670 1259
1260/*
1261 * Move-monster returns 1 if the object has been freed, otherwise 0.
1262 */
1263int
1264move_monster (object *op)
1265{
1266 int dir, diff, pre_att_dir; /* elmex: pre_att_dir remembers the direction before attack movement */
1267 object *owner, *enemy, *part, *oph = op;
1268 rv_vector rv;
1269
1270 /* Monsters not on maps don't do anything. These monsters are things
1271 * Like royal guards in city dwellers inventories.
1272 */
1273 if (!op->map)
1274 return 0;
1275
1276 /* for target facing, we copy this value here for fast access */
1277 if (oph->head) /* force update the head - one arch one pic */
1278 oph = oph->head;
1279
1280 if (QUERY_FLAG (op, FLAG_NO_ATTACK)) /* we never ever attack */
1281 enemy = op->enemy = NULL;
1282 else if ((enemy = find_enemy (op, &rv)))
1283 /* we have an enemy, just tell him we want him dead */
1284 enemy->attacked_by = op; /* our ptr */
1285
1286 /* generate hp, if applicable */
1287 if (op->stats.Con > 0 && op->stats.hp < op->stats.maxhp)
1288 {
1289 /* last heal is in funny units. Dividing by speed puts
1290 * the regeneration rate on a basis of time instead of
1291 * #moves the monster makes. The scaling by 8 is
1292 * to capture 8th's of a hp fraction regens
1293 *
1294 * Cast to sint32 before comparing to maxhp since otherwise an (sint16)
1295 * overflow might produce monsters with negative hp.
1296 */
1297
1298 op->last_heal += (int) ((float) (8 * op->stats.Con) / op->speed);
1299 op->stats.hp = min ((sint32) op->stats.hp + op->last_heal / 32, op->stats.maxhp); /* causes Con/4 hp/tick */
1300 op->last_heal %= 32;
1301
1302 /* So if the monster has gained enough HP that they are no longer afraid */
1303 if (QUERY_FLAG (op, FLAG_RUN_AWAY) && op->stats.hp >= (signed short)(((float)op->run_away / 100.f) * (float)op->stats.maxhp))
1304 CLEAR_FLAG (op, FLAG_RUN_AWAY);
1305
1306 if (op->stats.hp > op->stats.maxhp)
1307 op->stats.hp = op->stats.maxhp;
1308 }
1309
1310 /* generate sp, if applicable */
1311 if (op->stats.Pow > 0 && op->stats.sp < op->stats.maxsp)
1312 {
1313 /* last_sp is in funny units. Dividing by speed puts
1314 * the regeneration rate on a basis of time instead of
1315 * #moves the monster makes. The scaling by 8 is
1316 * to capture 8th's of a sp fraction regens
1317 *
1318 * Cast to sint32 before comparing to maxhp since otherwise an (sint16)
1319 * overflow might produce monsters with negative sp.
1320 */
1321
1322 op->last_sp += (int) ((float) (8 * op->stats.Pow) / op->speed);
1323 op->stats.sp = min (op->stats.sp + op->last_sp / 128, op->stats.maxsp); /* causes Pow/16 sp/tick */
1324 op->last_sp %= 128;
1325 }
1326
1327 /* this should probably get modified by many more values.
1328 * (eg, creatures resistance to fear, level, etc. )
1329 */
1330 if (QUERY_FLAG (op, FLAG_SCARED) && !(rndm (20)))
1331 CLEAR_FLAG (op, FLAG_SCARED); /* Time to regain some "guts"... */
1332
1333 if (INVOKE_OBJECT (MONSTER_MOVE, op, ARG_OBJECT (op->enemy)))
1334 return QUERY_FLAG (op, FLAG_FREED);
1335
1336 if (QUERY_FLAG (op, FLAG_SLEEP) || QUERY_FLAG (op, FLAG_BLIND) ||
1337 ((op->map->darklevel () > 0) && !QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !QUERY_FLAG (op, FLAG_SEE_INVISIBLE)))
1338 if (!check_wakeup (op, enemy, &rv))
1339 return 0;
1340
1341 /* check if monster pops out of hidden spot */
1342 if (op->flag [FLAG_HIDDEN])
1343 do_hidden_move (op);
1344
1345 if (op->pick_up)
1346 monster_check_pickup (op);
1347
1348 if (op->will_apply)
1349 monster_apply_below (op); /* Check for items to apply below */
1350
1351 /* If we don't have an enemy, do special movement or the like */
1352 if (!enemy)
1353 {
1354 if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
1355 {
1356 op->drop_and_destroy ();
1357 return 1;
1358 }
1359
1360 /* Probably really a bug for a creature to have both
1361 * stand still and a movement type set.
1362 */
1363 if (!QUERY_FLAG (op, FLAG_STAND_STILL))
1364 {
1365 if (op->attack_movement & HI4)
1366 {
1367 switch (op->attack_movement & HI4)
1368 {
1369 case PETMOVE:
1370 pet_move (op);
1371 break;
1372
1373 case CIRCLE1:
1374 circ1_move (op);
1375 break;
1376
1377 case CIRCLE2:
1378 circ2_move (op);
1379 break;
1380
1381 case PACEV:
1382 pace_movev (op);
1383 break;
1384
1385 case PACEH:
1386 pace_moveh (op);
1387 break;
1388
1389 case PACEV2:
1390 pace2_movev (op);
1391 break;
1392
1393 case PACEH2:
1394 pace2_moveh (op);
1395 break;
1396
1397 case RANDO:
1398 rand_move (op);
1399 break;
1400
1401 case RANDO2:
1402 move_randomly (op);
1403 break;
1404 }
1405
1406 return 0;
1407 }
1408 else if (QUERY_FLAG (op, FLAG_RANDOM_MOVE))
1409 move_randomly (op);
1410 } /* stand still */
1411
1412 return 0;
1413 } /* no enemy */
1414
1415 /* We have an enemy. Block immediately below is for pets */
1416 if ((op->attack_movement & HI4) == PETMOVE
1417 && (owner = op->owner) != NULL
1418 && !on_same_map (op, owner)
1419 && !owner->flag [FLAG_REMOVED])
1420 return follow_owner (op, owner);
1421
1422 /* doppleganger code to change monster facing to that of the nearest
1423 * player. Hmm. The code is here, but no monster in the current
1424 * arch set uses it.
1425 */
1426 if (op->race == shstr_doppleganger)
1427 {
1428 op->face = enemy->face;
1429 op->name = enemy->name;
1430 }
1431
1432 /* Calculate range information for closest body part - this
1433 * is used for the 'skill' code, which isn't that smart when
1434 * it comes to figuring it out - otherwise, giants throw boulders
1435 * into themselves.
1436 */
1437 get_rangevector (op, enemy, &rv, 0);
1438
1439 /* Move the check for scared up here - if the monster was scared,
1440 * we were not doing any of the logic below, so might as well save
1441 * a few cpu cycles.
1442 */
1443 if (!QUERY_FLAG (op, FLAG_SCARED))
1444 {
1445 rv_vector rv1;
1446
1447 /* now we test every part of an object .... this is a real ugly piece of code */
1448 for (part = op; part; part = part->more)
1449 {
1450 get_rangevector (part, enemy, &rv1, 0x1);
1451 dir = rv1.direction;
1452
1453 /* hm, not sure about this part - in original was a scared flag here too
1454 * but that we test above... so can be old code here
1455 */
1456 if (QUERY_FLAG (op, FLAG_RUN_AWAY))
1457 dir = absdir (dir + 4);
1458
1459 if (QUERY_FLAG (op, FLAG_CONFUSED))
1460 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1461
1462 if (QUERY_FLAG (op, FLAG_CAST_SPELL) && !(rndm (3)))
1463 if (monster_cast_spell (op, part, enemy, dir, &rv1))
1464 return 0;
1465
1466 if (QUERY_FLAG (op, FLAG_READY_SCROLL) && !(rndm (3)))
1467 if (monster_use_scroll (op, part, enemy, dir, &rv1))
1468 return 0;
1469
1470 if (QUERY_FLAG (op, FLAG_READY_RANGE) && !(rndm (3)))
1471 if (monster_use_range (op, part, enemy, dir))
1472 return 0;
1473
1474 if (QUERY_FLAG (op, FLAG_READY_SKILL) && !(rndm (3)))
1475 if (monster_use_skill (op, rv.part, enemy, rv.direction))
1476 return 0;
1477
1478 if (QUERY_FLAG (op, FLAG_READY_BOW) && !(rndm (2)))
1479 if (monster_use_bow (op, part, enemy, dir))
1480 return 0;
1481 } /* for processing of all parts */
1482 } /* If not scared */
1483
1484 part = rv.part;
1485 dir = rv.direction;
1486
1487//-GPL
1488
1489 // if the enemy is a player, we have los. if los says we
1490 // can directly reach the player, we do not deviate.
1491 // for non-players, we never deviate
1492 if (op->stats.Wis >= 8
1493 && enemy->contr && enemy->contr->darkness_at (op->map, op->x, op->y) == LOS_BLOCKED)
1494 {
1495 int sdir = 0;
1496 uint32_t &smell = op->ms ().smell;
1497
1498 for (int ndir = 1; ndir <= 8; ++ndir)
1499 {
1500 mapxy pos (op); pos.move (ndir);
1501
1502 if (pos.normalise ())
1503 {
1504 mapspace &ms = pos.ms ();
1505
1506 if (ms.smell > smell)
1507 {
1508 //printf ("%s: found smell, following it, apparently (%d, %d)\n",& op->name,op->ms().smell,ms.smell);//D
1509 if (op->stats.Wis >= 10)
1510 smell = ms.smell - 1; // smarter: tell others
1511
1512 sdir = ndir;
1513
1514 // perturbing the path might let the monster lose track,
1515 // but it will also widen the actual path, spreading information
1516 if (op->stats.Wis >= 15 && !rndm (20)) // even smarter, deviate and spread?
1517 sdir = absdir (sdir + 1 - rndm (2) * 2);
1518 }
1519 }
1520 }
1521
1522 if (sdir)
1523 dir = sdir;
1524 else if (smell)
1525 {
1526 // no better smell found, so assume the player jumped, and erase this smell
1527 //printf ("erasing smell %d\n", op->ms ().smell);//D
1528 unordered_mapwalk (mapwalk_buf, op, -1, -1, 1, 1)
1529 m->at (nx, ny).smell = 0;
1530 }
1531 }
1532
1533//+GPL
1534
1535 if (QUERY_FLAG (op, FLAG_SCARED) || QUERY_FLAG (op, FLAG_RUN_AWAY))
1536 dir = absdir (dir + 4);
1537
1538 if (QUERY_FLAG (op, FLAG_CONFUSED))
1539 dir = absdir (dir + rndm (3) + rndm (3) - 2);
1540
1541 pre_att_dir = dir; /* remember the original direction */
1542
1543 if ((op->attack_movement & LO4) && !QUERY_FLAG (op, FLAG_SCARED))
1544 {
1545 switch (op->attack_movement & LO4)
1546 {
1547 case DISTATT:
1548 dir = dist_att (dir, op, enemy, part, &rv);
1549 break;
1550
1551 case RUNATT:
1552 dir = run_att (dir, op, enemy, part, &rv);
1553 break;
1554
1555 case HITRUN:
1556 dir = hitrun_att (dir, op, enemy);
1557 break;
1558
1559 case WAITATT:
1560 dir = wait_att (dir, op, enemy, part, &rv);
1561 break;
1562
1563 case RUSH: /* default - monster normally moves towards player */
1564 case ALLRUN:
1565 break;
1566
1567 case DISTHIT:
1568 dir = disthit_att (dir, op, enemy, part, &rv);
1569 break;
1570
1571 case WAIT2:
1572 dir = wait_att2 (dir, op, enemy, part, &rv);
1573 break;
1574
1575 default:
1576 LOG (llevDebug, "Illegal low mon-move: %d\n", op->attack_movement & LO4);
1577 }
1578 }
1579
1580 if (!dir)
1581 return 0;
1582
1583 if (!QUERY_FLAG (op, FLAG_STAND_STILL))
1584 {
1585 if (move_object (op, dir)) /* Can the monster move directly toward player? */
1586 {
1587 /* elmex: Turn our monster after it moved if it has DISTATT attack */
1588 if ((op->attack_movement & LO4) == DISTATT)
1589 op->direction = pre_att_dir;
1590
1591 return 0;
1592 }
1593
1594 if (QUERY_FLAG (op, FLAG_SCARED) || !can_hit (part, enemy, &rv) || QUERY_FLAG (op, FLAG_RUN_AWAY))
1595 {
1596 /* Try move around corners if !close */
1597 int maxdiff = (QUERY_FLAG (op, FLAG_ONLY_ATTACK) || rndm (2)) ? 1 : 2;
1598
1599 for (diff = 1; diff <= maxdiff; diff++)
1600 {
1601 /* try different detours */
1602 int m = 1 - rndm (2) * 2; /* Try left or right first? */
1603
1604 if (move_object (op, absdir (dir + diff * m)) || move_object (op, absdir (dir - diff * m)))
1605 return 0;
1606 }
1607 }
1608 } /* if monster is not standing still */
1609
1610 /* elmex: Turn our monster after it moved if it has DISTATT attack */
1611 if ((op->attack_movement & LO4) == DISTATT)
1612 op->direction = pre_att_dir;
1613
1614 /*
1615 * Eneq(@csd.uu.se): Patch to make RUN_AWAY or SCARED monsters move a random
1616 * direction if they can't move away.
1617 */
1618 if (!QUERY_FLAG (op, FLAG_ONLY_ATTACK) && (QUERY_FLAG (op, FLAG_RUN_AWAY) || QUERY_FLAG (op, FLAG_SCARED)))
1619 if (move_randomly (op))
1620 return 0;
1621
1622 /*
1623 * Try giving the monster a new enemy - the player that is closest
1624 * to it. In this way, it won't just keep trying to get to a target
1625 * that is inaccessible.
1626 * This could be more clever - it should go through a list of several
1627 * enemies, as it is now, you could perhaps get situations where there
1628 * are two players flanking the monster at close distance, but which
1629 * the monster can't get to, and a third one at a far distance that
1630 * the monster could get to - as it is, the monster won't look at that
1631 * third one.
1632 */
1633 if (!QUERY_FLAG (op, FLAG_FRIENDLY) && enemy == op->enemy)
1634 {
1635 object *nearest_player = get_nearest_player (op);
1636
1637 if (nearest_player && nearest_player != enemy && !can_hit (part, enemy, &rv))
1638 {
1639 op->enemy = 0;
1640 enemy = nearest_player;
1641 }
1642 }
1643
1644 if (!QUERY_FLAG (op, FLAG_SCARED) && can_hit (part, enemy, &rv))
1645 {
1646 /* The adjustement to wc that was here before looked totally bogus -
1647 * since wc can in fact get negative, that would mean by adding
1648 * the current wc, the creature gets better? Instead, just
1649 * add a fixed amount - nasty creatures that are runny away should
1650 * still be pretty nasty.
1651 */
1652 if (QUERY_FLAG (op, FLAG_RUN_AWAY))
1653 {
1654 part->stats.wc += 10;
1655 skill_attack (enemy, part, 0, NULL, NULL);
1656 part->stats.wc -= 10;
1657 }
1658 else
1659 skill_attack (enemy, part, 0, NULL, NULL);
1660 } /* if monster is in attack range */
1661
1662 if (QUERY_FLAG (part, FLAG_FREED)) /* Might be freed by ghost-attack or hit-back */
1663 return 1;
1664
1665 if (QUERY_FLAG (op, FLAG_ONLY_ATTACK))
1666 {
1667 op->drop_and_destroy ();
1668 return 1;
1669 }
1670
1671 return 0;
1672}
1673
1671/* determine if we can 'detect' the enemy. Check for walls blocking the 1674/* determine if we can 'detect' the enemy. Check for walls blocking the
1672 * los. Also, just because its hidden/invisible, we may be sensitive/smart 1675 * los. Also, just because its hidden/invisible, we may be sensitive/smart
1673 * enough (based on Wis & Int) to figure out where the enemy is. -b.t. 1676 * enough (based on Wis & Int) to figure out where the enemy is. -b.t.
1674 * modified by MSW to use the get_rangevector so that map tiling works 1677 * modified by MSW to use the get_rangevector so that map tiling works
1675 * properly. I also so odd code in place that checked for x distance 1678 * properly. I also so odd code in place that checked for x distance
1676 * OR y distance being within some range - that seemed wrong - both should 1679 * OR y distance being within some range - that seemed wrong - both should
1677 * be within the valid range. MSW 2001-08-05 1680 * be within the valid range. MSW 2001-08-05
1678 * Returns 0 if enemy can not be detected, 1 if it is detected 1681 * Returns 0 if enemy can not be detected, 1 if it is detected
1679 */ 1682 */
1680
1681int 1683int
1682can_detect_enemy (object *op, object *enemy, rv_vector * rv) 1684can_detect_enemy (object *op, object *enemy, rv_vector * rv)
1683{ 1685{
1684 int radius = MIN_MON_RADIUS, hide_discovery;
1685
1686 /* null detection for any of these condtions always */ 1686 /* null detection for any of these condtions always */
1687 if (!op || !enemy || !op->map || !enemy->map) 1687 if (!op || !enemy || !op->map || !enemy->map)
1688 return 0; 1688 return 0;
1689 1689
1690 /* If the monster (op) has no way to get to the enemy, do nothing */ 1690 /* If the monster (op) has no way to get to the enemy, do nothing */
… …
1692 return 0; 1692 return 0;
1693 1693
1694 get_rangevector (op, enemy, rv, 0); 1694 get_rangevector (op, enemy, rv, 0);
1695 1695
1696 /* Monsters always ignore the DM */ 1696 /* Monsters always ignore the DM */
1697 if ((op->type != PLAYER) && QUERY_FLAG (enemy, FLAG_WIZ)) 1697 if (!op->is_player () && QUERY_FLAG (enemy, FLAG_WIZ))
1698 return 0; 1698 return 0;
1699 1699
1700 /* simple check. Should probably put some range checks in here. */ 1700 /* simple check. Should probably put some range checks in here. */
1701 if (can_see_enemy (op, enemy)) 1701 if (can_see_enemy (op, enemy))
1702 return 1; 1702 return 1;
1703 1703
1704 /* The rest of this is for monsters. Players are on their own for 1704 /* The rest of this is for monsters. Players are on their own for
1705 * finding enemies! 1705 * finding enemies!
1706 */ 1706 */
1707 if (op->type == PLAYER) 1707 if (op->is_player ())
1708 return 0; 1708 return 0;
1709 1709
1710 /* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE 1710 /* Quality invisible? Bah, we wont see them w/o SEE_INVISIBLE
1711 * flag (which was already checked) in can_see_enmy (). Lets get out of here 1711 * flag (which was already checked) in can_see_enemy (). Lets get out of here
1712 */ 1712 */
1713 if (enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden))) 1713 if (enemy->invisible && (!enemy->contr || (!enemy->contr->tmp_invis && !enemy->contr->hidden)))
1714 return 0; 1714 return 0;
1715 1715
1716 int radius = MIN_MON_RADIUS;
1717
1716 /* use this for invis also */ 1718 /* use this for invis also */
1717 hide_discovery = op->stats.Int / 5; 1719 int hide_discovery = op->stats.Int / 5;
1718 1720
1719 /* Determine Detection radii */ 1721 /* Determine Detection radii */
1720 if (!enemy->hide) /* to detect non-hidden (eg dark/invis enemy) */ 1722 if (!enemy->flag [FLAG_HIDDEN]) /* to detect non-hidden (eg dark/invis enemy) */
1721 radius = (op->stats.Wis / 5) + 1 > MIN_MON_RADIUS ? (op->stats.Wis / 5) + 1 : MIN_MON_RADIUS; 1723 radius = max (MIN_MON_RADIUS, op->stats.Wis / 3 + 1);
1722 else 1724 else
1723 { /* a level/INT/Dex adjustment for hiding */ 1725 { /* a level/INT/Dex adjustment for hiding */
1724 object *sk_hide;
1725 int bonus = (op->level / 2) + (op->stats.Int / 5); 1726 int bonus = op->level / 2 + op->stats.Int / 5;
1726 1727
1727 if (enemy->type == PLAYER) 1728 if (enemy->is_player ())
1728 { 1729 {
1729 if ((sk_hide = find_skill_by_number (enemy, SK_HIDING))) 1730 if (object *sk_hide = find_skill_by_number (enemy, SK_HIDING))
1730 bonus -= sk_hide->level; 1731 bonus -= sk_hide->level;
1731 else 1732 else
1732 { 1733 {
1733 LOG (llevError, "can_detect_enemy() got hidden player w/o hiding skill!\n"); 1734 LOG (llevError, "can_detect_enemy() got hidden player w/o hiding skill!\n");
1734 make_visible (enemy); 1735 make_visible (enemy);
… …
1743 } /* else creature has modifiers for hiding */ 1744 } /* else creature has modifiers for hiding */
1744 1745
1745 /* Radii stealth adjustment. Only if you are stealthy 1746 /* Radii stealth adjustment. Only if you are stealthy
1746 * will you be able to sneak up closer to creatures */ 1747 * will you be able to sneak up closer to creatures */
1747 if (QUERY_FLAG (enemy, FLAG_STEALTH)) 1748 if (QUERY_FLAG (enemy, FLAG_STEALTH))
1748 radius = radius / 2, hide_discovery = hide_discovery / 3; 1749 {
1750 radius /= 2;
1751 hide_discovery /= 3;
1752 }
1749 1753
1750 /* Radii adjustment for enemy standing in the dark */ 1754 /* Radii adjustment for enemy standing in the dark */
1751 if (op->map->darkness > 0 && !stand_in_light (enemy)) 1755 if (!stand_in_light (enemy))
1752 { 1756 {
1753 /* on dark maps body heat can help indicate location with infravision 1757 /* on dark maps body heat can help indicate location with infravision
1754 * undead don't have body heat, so no benefit detecting them. 1758 * undead don't have body heat, so no benefit detecting them.
1755 */ 1759 */
1756 if (QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !is_true_undead (enemy)) 1760 if (QUERY_FLAG (op, FLAG_SEE_IN_DARK) && !is_true_undead (enemy))
1757 radius += op->map->darkness / 2; 1761 radius += op->map->darklevel () / 2;
1758 else 1762 else
1759 radius -= op->map->darkness / 2; 1763 radius -= op->map->darklevel () / 2;
1760 1764
1761 /* op next to a monster (and not in complete darkness) 1765 /* op next to a monster (and not in complete darkness)
1762 * the monster should have a chance to see you. 1766 * the monster should have a chance to see you.
1763 */ 1767 */
1764 if (radius < MIN_MON_RADIUS && op->map->darkness < 5 && rv->distance <= 1) 1768 if (radius < MIN_MON_RADIUS && op->map->darklevel () < MAX_DARKNESS && rv->distance <= 1)
1765 radius = MIN_MON_RADIUS; 1769 radius = MIN_MON_RADIUS;
1766 } /* if on dark map */ 1770 } /* if on dark map */
1767 1771
1768 /* Lets not worry about monsters that have incredible detection 1772 /* Lets not worry about monsters that have incredible detection
1769 * radii, we only need to worry here about things the player can 1773 * radii, we only need to worry here about things the player can
… …
1771 * may have for their map - in that way, creatures at the edge will 1775 * may have for their map - in that way, creatures at the edge will
1772 * do something. Note that the distance field in the 1776 * do something. Note that the distance field in the
1773 * vector is real distance, so in theory this should be 18 to 1777 * vector is real distance, so in theory this should be 18 to
1774 * find that. 1778 * find that.
1775 */ 1779 */
1776 if (radius > 13) 1780 // note that the above reasoning was utter bullshit even at the time it was written
1777 radius = 13; 1781 // we use 25, lets see if we have the cpu time for it
1782 radius = min (25, radius);
1778 1783
1779 /* Enemy in range! Now test for detection */ 1784 /* Enemy in range! Now test for detection */
1780 if ((int) rv->distance <= radius) 1785 if (rv->distance <= radius)
1781 { 1786 {
1782 /* ah, we are within range, detected? take cases */ 1787 /* ah, we are within range, detected? take cases */
1783 if (!enemy->invisible) /* enemy in dark squares... are seen! */ 1788 if (!enemy->invisible) /* enemy in dark squares... are seen! */
1784 return 1; 1789 return 1;
1785 1790
1786 /* hidden or low-quality invisible */ 1791 /* hidden or low-quality invisible */
1787 if (enemy->hide && (rv->distance <= 1) && (rndm (100) <= hide_discovery)) 1792 if (enemy->flag [FLAG_HIDDEN] && rv->distance <= 1 && rndm (100) <= hide_discovery)
1788 { 1793 {
1789 make_visible (enemy); 1794 make_visible (enemy);
1795
1790 /* inform players of new status */ 1796 /* inform players of new status */
1791 if (enemy->type == PLAYER && player_can_view (enemy, op)) 1797 if (enemy->type == PLAYER && player_can_view (enemy, op))
1792 new_draw_info_format (NDI_UNIQUE, 0, enemy, "You are discovered by %s!", &op->name); 1798 new_draw_info_format (NDI_UNIQUE, 0, enemy, "You are discovered by %s!", &op->name);
1799
1793 return 1; /* detected enemy */ 1800 return 1; /* detected enemy */
1794 } 1801 }
1795 else if (enemy->invisible) 1802 else if (enemy->invisible)
1796 { 1803 {
1797 /* Change this around - instead of negating the invisible, just 1804 /* Change this around - instead of negating the invisible, just
1798 * return true so that the mosnter that managed to detect you can 1805 * return true so that the monster that managed to detect you can
1799 * do something to you. Decreasing the duration of invisible 1806 * do something to you. Decreasing the duration of invisible
1800 * doesn't make a lot of sense IMO, as a bunch of stupid creatures 1807 * doesn't make a lot of sense IMO, as a bunch of stupid creatures
1801 * can then basically negate the spell. The spell isn't negated - 1808 * can then basically negate the spell. The spell isn't negated -
1802 * they just know where you are! 1809 * they just know where you are!
1803 */ 1810 */
1804 if ((rndm (50)) <= hide_discovery) 1811 if (rndm (50) <= hide_discovery)
1805 { 1812 {
1806 if (enemy->type == PLAYER) 1813 if (enemy->type == PLAYER)
1807 {
1808 new_draw_info_format (NDI_UNIQUE, 0, enemy, "You see %s noticing your position.", query_name (op)); 1814 new_draw_info_format (NDI_UNIQUE, 0, enemy, "You see %s noticing your position.", query_name (op));
1809 } 1815
1810 return 1; 1816 return 1;
1811 } 1817 }
1812 } 1818 }
1813 } /* within range */ 1819 } /* within range */
1814 1820
1815 /* Wasn't detected above, so still hidden */ 1821 /* Wasn't detected above, so still hidden */
1816 return 0; 1822 return 0;
1817} 1823}
1818 1824
1819/* determine if op stands in a lighted square. This is not a very 1825/* determine if op stands in a lighted square. This is not a very
1820 * intellegent algorithm. For one thing, we ignore los here, SO it 1826 * intelligent algorithm. For one thing, we ignore los here, SO it
1821 * is possible for a bright light to illuminate a player on the 1827 * is possible for a bright light to illuminate a player on the
1822 * other side of a wall (!). 1828 * other side of a wall (!).
1823 */ 1829 */
1824int 1830int
1825stand_in_light (object *op) 1831stand_in_light (object *op)
1826{ 1832{
1827 sint16 nx, ny;
1828 maptile *m;
1829
1830 if (!op) 1833 if (op)
1834 {
1835 if (!op->is_on_map ())
1831 return 0; 1836 return 0;
1832 1837
1838 if (op->map->darklevel () <= 0)
1839 return 1;
1840
1833 if (op->glow_radius > 0) 1841 if (op->glow_radius > 0)
1834 return 1; 1842 return 1;
1835 1843
1836 if (op->map) 1844 if (op->map)
1837 { 1845 unordered_mapwalk (mapwalk_buf, op, -MAX_LIGHT_RADIUS, -MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS, MAX_LIGHT_RADIUS)
1838 int x, y, x1, y1; 1846 {
1839
1840 /* Check the spaces with the max light radius to see if any of them 1847 /* Check the spaces with the max light radius to see if any of them
1841 * have lights, and if any of them light the player enough, then return 1. 1848 * have lights, and if any of them light the player enough, then return 1.
1842 */
1843 for (x = op->x - MAX_LIGHT_RADII; x <= op->x + MAX_LIGHT_RADII; x++)
1844 {
1845 for (y = op->y - MAX_LIGHT_RADII; y <= op->y + MAX_LIGHT_RADII; y++)
1846 { 1849 */
1847 m = op->map; 1850 int light = m->at (nx, ny).light;
1848 nx = x;
1849 ny = y;
1850 1851
1851 if (get_map_flags (m, &m, nx, ny, &nx, &ny) & P_OUT_OF_MAP) 1852 if (expect_false (light > 0) && idistance (dx, dy) <= light)
1852 continue;
1853
1854 x1 = abs (x - op->x) * abs (x - op->x);
1855 y1 = abs (y - op->y) * abs (y - op->y);
1856 if (isqrt (x1 + y1) < GET_MAP_LIGHT (m, nx, ny))
1857 return 1; 1853 return 1;
1858 } 1854 }
1859 }
1860 } 1855 }
1861 1856
1862 return 0; 1857 return 0;
1863} 1858}
1864 1859
… …
1888 { 1883 {
1889 /* HIDDEN ENEMY. by definition, you can't see hidden stuff! 1884 /* HIDDEN ENEMY. by definition, you can't see hidden stuff!
1890 * However,if you carry any source of light, then the hidden 1885 * However,if you carry any source of light, then the hidden
1891 * creature is seeable (and stupid) */ 1886 * creature is seeable (and stupid) */
1892 1887
1893 if (has_carried_lights (enemy)) 1888 if (enemy->has_carried_lights ())
1894 { 1889 {
1895 if (enemy->hide) 1890 if (enemy->flag [FLAG_HIDDEN])
1896 { 1891 {
1897 make_visible (enemy); 1892 make_visible (enemy);
1898 new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!"); 1893 new_draw_info (NDI_UNIQUE, 0, enemy, "Your light reveals your hiding spot!");
1899 } 1894 }
1895
1900 return 1; 1896 return 1;
1901 } 1897 }
1902 else if (enemy->hide) 1898 else if (enemy->flag [FLAG_HIDDEN])
1903 return 0; 1899 return 0;
1904 1900
1905 /* Invisible enemy. Break apart the check for invis undead/invis looker 1901 /* Invisible enemy. Break apart the check for invis undead/invis looker
1906 * into more simple checks - the QUERY_FLAG doesn't return 1/0 values, 1902 * into more simple checks - the QUERY_FLAG doesn't return 1/0 values,
1907 * and making it a conditional makes the code pretty ugly. 1903 * and making it a conditional makes the code pretty ugly.
1908 */ 1904 */
1909 if (!QUERY_FLAG (looker, FLAG_SEE_INVISIBLE)) 1905 if (!QUERY_FLAG (looker, FLAG_SEE_INVISIBLE))
1910 {
1911 if (makes_invisible_to (enemy, looker)) 1906 if (makes_invisible_to (enemy, looker))
1912 return 0; 1907 return 0;
1913 }
1914 } 1908 }
1915 else if (looker->type == PLAYER) /* for players, a (possible) shortcut */ 1909 else if (looker->is_player ()) /* for players, a (possible) shortcut */
1916 if (player_can_view (looker, enemy)) 1910 if (player_can_view (looker, enemy))
1917 return 1; 1911 return 1;
1918 1912
1919 /* ENEMY IN DARK MAP. Without infravision, the enemy is not seen 1913 /* ENEMY IN DARK MAP. Without infravision, the enemy is not seen
1920 * unless they carry a light or stand in light. Darkness doesnt 1914 * unless they carry a light or stand in light. Darkness doesnt
… …
1923 * we care about the enemy maps status, not the looker. 1917 * we care about the enemy maps status, not the looker.
1924 * only relevant for tiled maps, but it is possible that the 1918 * only relevant for tiled maps, but it is possible that the
1925 * enemy is on a bright map and the looker on a dark - in that 1919 * enemy is on a bright map and the looker on a dark - in that
1926 * case, the looker can still see the enemy 1920 * case, the looker can still see the enemy
1927 */ 1921 */
1928 if (enemy->map->darkness > 0 && !stand_in_light (enemy) 1922 if (!stand_in_light (enemy)
1929 && (!QUERY_FLAG (looker, FLAG_SEE_IN_DARK) || !is_true_undead (looker) || !QUERY_FLAG (looker, FLAG_XRAYS))) 1923 && (!QUERY_FLAG (looker, FLAG_SEE_IN_DARK) || !is_true_undead (looker) || !QUERY_FLAG (looker, FLAG_XRAYS)))
1930 return 0; 1924 return 0;
1931 1925
1932 return 1; 1926 return 1;
1933} 1927}
1928
1929//-GPL

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