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Comparing deliantra/server/server/alchemy.C (file contents):
Revision 1.8 by root, Thu Sep 14 22:34:03 2006 UTC vs.
Revision 1.55 by root, Thu May 6 22:08:07 2010 UTC

1/* 1/*
2 CrossFire, A Multiplayer game for X-windows 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 3 *
4 * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
4 Copyright (C) 2002 Mark Wedel & Crossfire Development Team 5 * Copyright (©) 2002 Mark Wedel & Crossfire Development Team
5 Copyright (C) 1992 Frank Tore Johansen 6 * Copyright (©) 1992 Frank Tore Johansen
6 7 *
7 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
8 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
9 the Free Software Foundation; either version 2 of the License, or 10 * Free Software Foundation, either version 3 of the License, or (at your
10 (at your option) any later version. 11 * option) any later version.
11 12 *
12 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,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details. 16 * GNU General Public License for more details.
16 17 *
17 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
18 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
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 * <http://www.gnu.org/licenses/>.
20 21 *
21 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>
22*/ 23 */
23 24
24/* March 96 - Laid down original code. -b.t. thomas@astro.psu.edu */ 25/* March 96 - Laid down original code. -b.t. thomas@astro.psu.edu */
25 26
26#include <global.h> 27#include <global.h>
27#include <object.h> 28#include <object.h>
28#ifndef __CEXTRACT__
29# include <sproto.h> 29#include <sproto.h>
30#endif
31#include <skills.h> 30#include <skills.h>
32#include <spells.h> 31#include <spells.h>
33 32
34/** define this for some helpful debuging information */ 33/** define this for some helpful debuging information */
35#if 0 34#if 0
… …
57 "rattles", 56 "rattles",
58 "makes chugging sounds", 57 "makes chugging sounds",
59 "smokes heavily for a while" 58 "smokes heavily for a while"
60}; 59};
61 60
62
63static int is_defined_recipe (const recipe *rp, const object *cauldron, object *caster); 61static int is_defined_recipe (const recipe *rp, const object *cauldron, object *caster);
64static recipe *find_recipe (recipelist * fl, int formula, object *ingredients); 62static recipe *find_recipe (recipelist * fl, int formula, object *ingredients);
65 63
66
67/** Returns a random selection from cauldron_effect[] */ 64/** Returns a random selection from cauldron_effect[] */
68static const char * 65static const char *
69cauldron_sound (void) 66cauldron_sound ()
70{ 67{
71 int size = sizeof (cauldron_effect) / sizeof (char *); 68 return cauldron_effect [rndm (array_length (cauldron_effect))];
72
73 return cauldron_effect[rndm (0, size - 1)];
74} 69}
75 70
76/** 71/**
72 * Recipe value of the entire contents of a container.
73 * This appears to just generate a hash value, which I guess for now works
74 * ok, but the possibility of duplicate hashes is certainly possible - msw
75 */
76static int
77content_recipe_value (object *op)
78{
79 object *tmp = op->inv;
80 int formula = 0;
81
82 while (tmp)
83 {
84 const char *name = tmp->title
85 ? (const char *)format ("%s %s", &tmp->name, &tmp->title)
86 : tmp->name;
87
88 int tval = strtoint (name) * tmp->number_of ();
89#ifdef ALCHEMY_DEBUG
90 LOG (llevDebug, "Got ingredient %d %s(%d)\n", tmp->nrof ? tmp->nrof : 1, name, tval);
91#endif
92 formula += tval;
93 tmp = tmp->below;
94 }
95#ifdef ALCHEMY_DEBUG
96 LOG (llevDebug, " Formula value=%d\n", formula);
97#endif
98
99 return formula;
100}
101
102/**
103 * Returns total number of items in op
104 */
105static int
106numb_ob_inside (object *op)
107{
108 object *tmp = op->inv;
109 int number = 0, o_number = 0;
110
111 while (tmp)
112 {
113 if (tmp->nrof)
114 number += tmp->nrof;
115 else
116 number++;
117 o_number++;
118 tmp = tmp->below;
119 }
120#ifdef ALCHEMY_DEBUG
121 LOG (llevDebug, "numb_ob_inside(%s): found %d ingredients\n", &op->name, o_number);
122#endif
123 return o_number;
124}
125
126/**
127 * Looks through the ingredient list. If we find a
128 * suitable object in it - we will use that to make the requested artifact.
129 * Otherwise the code returns a 'generic' item if create_item is set. -b.t.
130 *
131 * @param rp_arch_index pointer to return value; set to arch index for recipe;
132 * set to zero if not using a transmution formula
133 */
134static object *
135find_transmution_ob (object *first_ingred, recipe *rp, size_t *rp_arch_index, int create_item)
136{
137 object *prod_item = 0;
138 bool found = false;
139 *rp_arch_index = 0;
140
141 if (rp->transmute) /* look for matching ingredient/prod archs */
142 for (object *item = first_ingred; item; item = item->below)
143 {
144 for (int i = 0; i < rp->arch_names; i++)
145 //TODO: should be a shstr comparison
146 if (!strcmp(&item->arch->archname,rp->arch_name[i]))
147 {
148 *rp_arch_index = i;
149 prod_item = item;
150 break;
151 }
152
153 if (prod_item)
154 break;
155 }
156
157 /* failed, create a fresh object. Note no nrof>1 because that would
158 * allow players to create massive amounts of artifacts easily */
159 if (create_item && (!prod_item || prod_item->nrof > 1))
160 {
161#ifdef ALCHEMY_DEBUG
162 LOG (llevDebug, "creating a new item.\n");
163 if (prod_item != NULL)
164 {
165 LOG (llevDebug, " had item: arch %s(nrof:%d)\n",
166 &prod_item->arch->archname, prod_item->nrof);
167 }
168#endif
169 if (!prod_item)
170 *rp_arch_index = rndm (rp->arch_names);
171 prod_item = get_archetype (rp->arch_name[*rp_arch_index]);
172 }
173
174#ifdef ALCHEMY_DEBUG
175 LOG (llevDebug, "recipe calls for%stransmution.\n", rp->transmute ? " " : " no ");
176 if (prod_item != NULL)
177 {
178 LOG (llevDebug, " find_transmutable_ob(): returns arch %s(sp:%d)\n",
179 &prod_item->arch->archname, prod_item->stats.sp);
180 }
181#endif
182
183 return prod_item;
184}
185
186/**
187 * Using a list of items and a recipe to make an artifact.
188 *
189 * @param cauldron the cauldron (including the ingredients) used to make the item
190 *
191 * @param rp the recipe to make the artifact from
192 *
193 * @return the newly created object, NULL if something failed
194 */
195static object *
196make_item_from_recipe (object *cauldron, recipe *rp)
197{
198 artifact *art = NULL;
199 object *item = NULL;
200 size_t rp_arch_index;
201
202 if (rp == NULL)
203 return (object *) NULL;
204
205 /* Find the appropriate object to transform... */
206 if ((item = find_transmution_ob (cauldron->inv, rp, &rp_arch_index, 1)) == NULL)
207 {
208 LOG (llevDebug, "make_alchemy_item(): failed to create alchemical object.\n");
209 return (object *) NULL;
210 }
211
212 /* Find the appropriate artifact template... */
213 if (rp->title != shstr_NONE)
214 {
215 if ((art = locate_recipe_artifact (rp, rp_arch_index)) == NULL)
216 {
217 LOG (llevError, "make_alchemy_item(): failed to locate recipe artifact.\n");
218 LOG (llevDebug, " --requested recipe: %s of %s.\n", rp->arch_name[0], &rp->title);
219 return (object *) NULL;
220 }
221
222 transmute_materialname (item, art->item);
223 give_artifact_abilities (item, art->item);
224 }
225
226 if (cauldron->flag [FLAG_CURSED])
227 item->set_flag (FLAG_CURSED);
228 if (cauldron->flag [FLAG_DAMNED])
229 item->set_flag (FLAG_DAMNED);
230
231 return item;
232}
233
234/*
235 * All but object "save_item" are elimentated from
236 * the container list. Note we have to becareful to remove the inventories
237 * of objects in the cauldron inventory (ex icecube has stuff in it).
238 */
239static void
240remove_contents (object *first_ob, object *save_item)
241{
242 // this cries for a cleaner rewrite, removing save_item first possibly
243 object *next, *tmp = first_ob;
244
245 while (tmp)
246 {
247 next = tmp->below;
248
249 if (tmp == save_item)
250 {
251 if (!(tmp = next))
252 break;
253 else
254 next = next->below;
255 }
256
257 if (tmp->inv)
258 remove_contents (tmp->inv, NULL);
259
260 tmp->destroy ();
261 tmp = next;
262 }
263}
264
265/**
266 * We adjust the nrof, exp and level of the final product, based
267 * on the item's default parameters, and the relevant caster skill level.
268 */
269static void
270adjust_product (object *item, int lvl, int yield)
271{
272 int nrof = 1;
273
274 if (!yield)
275 yield = 1;
276
277 if (lvl <= 0)
278 lvl = 1; /* lets avoid div by zero! */
279
280 if (item->nrof)
281 {
282 nrof = (int) ((1.0 - 1.0 / (lvl / 10.0 + 1.0)) * (rndm (0, yield - 1) + rndm (0, yield - 1) + rndm (0, yield - 1)) + 1);
283
284 if (nrof > yield)
285 nrof = yield;
286
287 item->nrof = nrof;
288 }
289}
290
291/**
292 * Essentially a wrapper for make_item_from_recipe() and
293 * insert_ob_in_ob. If the caster has some alchemy skill, then they might
294 * gain some exp from (successfull) fabrication of the product.
295 * If nbatches==-1, don't give exp for this creation (random generation/
296 * failed recipe)
297 */
298static object *
299attempt_recipe (object *caster, object *cauldron, int ability, recipe *rp, int nbatches)
300{
301
302 object *item = NULL, *skop;
303
304 /* this should be passed to this fctn, not effiecent cpu use this way */
305 int batches = abs (nbatches);
306
307 /* is the cauldron the right type? */
308 if (rp->cauldron && rp->cauldron != cauldron->arch->archname)
309 return 0;
310
311 skop = find_skill_by_name (caster, rp->skill);
312 /* does the caster have the skill? */
313 if (!skop)
314 return 0;
315
316 /* code required for this recipe, search the caster */
317 if (rp->keycode)
318 {
319 object *tmp;
320
321 for (tmp = caster->inv; tmp; tmp = tmp->below)
322 {
323 if (tmp->type == FORCE && tmp->slaying && rp->keycode == tmp->slaying)
324 break;
325 }
326
327 if (!tmp)
328 { /* failure--no code found */
329 new_draw_info (NDI_UNIQUE, 0, caster, "You know the ingredients, but not the technique. Go learn how to do this recipe.");
330 return 0;
331 }
332 }
333
334#ifdef EXTREME_ALCHEMY_DEBUG
335 LOG (llevDebug, "attempt_recipe(): got %d nbatches\n", nbatches);
336 LOG (llevDebug, "attempt_recipe(): using recipe %s\n", *rp->title ? &rp->title : "unknown");
337#endif
338
339 if ((item = make_item_from_recipe (cauldron, rp)) != NULL)
340 {
341 remove_contents (cauldron->inv, item);
342 /* Recalc carrying of the cauldron, in case recipe did not conserve mass */
343 cauldron->update_weight ();
344 /* adj lvl, nrof on caster level */
345 adjust_product (item, ability, rp->yield ? (rp->yield * batches) : batches);
346 if (!item->env && (item = insert_ob_in_ob (item, cauldron)) == NULL)
347 {
348 new_draw_info (NDI_UNIQUE, 0, caster, "Nothing happened.");
349 /* new_draw_info_format(NDI_UNIQUE, 0,caster,
350 "Your spell causes the %s to explode!",&cauldron->name); */
351 /* kaboom_cauldron(); */
352 }
353 else
354 new_draw_info_format (NDI_UNIQUE, 0, caster, "The %s %s.", &cauldron->name, cauldron_sound ());
355 }
356
357 return item;
358}
359
360/**
361 * Ouch. We didnt get the formula we wanted.
362 * This fctn simulates the backfire effects--worse effects as the level
363 * increases. If SPELL_FAILURE_EFFECTS is defined some really evil things
364 * can happen to the would be alchemist. This table probably needs some
365 * adjustment for playbalance. -b.t.
366 */
367static void
368alchemy_failure_effect (object *op, object *cauldron, recipe *rp, int danger)
369{
370 int level = 0;
371
372 if (!op || !cauldron)
373 return;
374
375 if (danger > 1)
376 level = random_roll (1, danger, op, PREFER_LOW);
377
378#ifdef ALCHEMY_DEBUG
379 LOG (llevDebug, "Alchemy_failure_effect(): using level=%d\n", level);
380#endif
381
382 /* possible outcomes based on level */
383 if (level < 25)
384 { /* INGREDIENTS USED/SLAGGED */
385 object *item = NULL;
386
387 if (rndm (0, 2))
388 { /* slag created */
389 object *tmp = cauldron->inv;
390 int weight = 0;
391
392 tmp = get_archetype (shstr_rock);
393 tmp->weight = weight;
394 tmp->value = 0;
395 tmp->material = name_to_material (shstr_stone);
396 tmp->name = shstr_slag;
397 tmp->name_pl = shstr_slags;
398 item = insert_ob_in_ob (tmp, cauldron);
399 tmp->clr_flag (FLAG_CAN_ROLL);
400 tmp->set_flag (FLAG_NO_DROP);
401 tmp->move_block = 0;
402 }
403
404 remove_contents (cauldron->inv, item);
405 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s %s.", &cauldron->name, cauldron_sound ());
406 return;
407 }
408 else if (level < 40)
409 { /* MAKE TAINTED ITEM */
410 object *tmp = NULL;
411
412 if (!rp)
413 if ((rp = get_random_recipe ((recipelist *) NULL)) == NULL)
414 return;
415
416 if ((tmp = attempt_recipe (op, cauldron, 1, rp, -1)))
417 {
418 if (!tmp->flag [FLAG_CURSED]) /* curse it */
419 tmp->set_flag (FLAG_CURSED);
420
421 /* the apply code for potions already deals with cursed
422 * potions, so any code here is basically ignored.
423 */
424 if (tmp->type == FOOD)
425 {
426 tmp->stats.hp = random_roll (0, 149, op, PREFER_LOW);
427 }
428 tmp->value = 0; /* unsaleable item */
429
430 /* change stats downward */
431 do
432 {
433 change_attr_value (&tmp->stats, rndm (0, 6), -1 * (rndm (1, 3)));
434 }
435 while (rndm (0, 2));
436 }
437 return;
438 }
439
440 if (level == 40)
441 { /* MAKE RANDOM RECIPE */
442 recipelist *fl;
443 int numb = numb_ob_inside (cauldron);
444
445 fl = get_formulalist (numb - 1); /* take a lower recipe list */
446 if (fl && (rp = get_random_recipe (fl)))
447 /* even though random, don't grant user any EXP for it */
448 attempt_recipe (op, cauldron, 1, rp, -1);
449 else
450 alchemy_failure_effect (op, cauldron, rp, level - 1);
451 }
452 else if (level < 45)
453 { /* INFURIATE NPC's */
454 /* this is kind of kludgy I know... */
455 cauldron->enemy = op;
456 npc_call_help (cauldron);
457 cauldron->enemy = NULL;
458
459 alchemy_failure_effect (op, cauldron, rp, level - 5);
460 }
461 else if (level < 50)
462 { /* MINOR EXPLOSION/FIREBALL */
463 object *tmp;
464
465 remove_contents (cauldron->inv, NULL);
466 switch (rndm (0, 2))
467 {
468 case 0:
469 tmp = get_archetype (shstr_bomb);
470 tmp->stats.dam = random_roll (1, level, op, PREFER_LOW);
471 tmp->stats.hp = random_roll (1, level, op, PREFER_LOW);
472 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s creates a bomb!", &cauldron->name);
473 break;
474
475 default:
476 tmp = get_archetype (shstr_fireball);
477 tmp->stats.dam = random_roll (1, level, op, PREFER_LOW) / 5 + 1;
478 tmp->stats.hp = random_roll (1, level, op, PREFER_LOW) / 10 + 2;
479 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s erupts in flame!", &cauldron->name);
480 break;
481 }
482
483 tmp->insert_at (cauldron);
484 }
485 else if (level < 60)
486 { /* CREATE MONSTER */
487 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s %s.", &cauldron->name, cauldron_sound ());
488 remove_contents (cauldron->inv, NULL);
489 }
490 else if (level < 80)
491 { /* MAJOR FIRE */
492 object *fb = get_archetype (SP_MED_FIREBALL);
493
494 remove_contents (cauldron->inv, NULL);
495 fire_arch_from_position (cauldron, cauldron, cauldron->x, cauldron->y, 0, fb);
496 fb->destroy ();
497 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s erupts in flame!", &cauldron->name);
498 }
499 else if (level < 100)
500 { /* WHAMMY the CAULDRON */
501 if (!cauldron->flag [FLAG_CURSED])
502 cauldron->set_flag (FLAG_CURSED);
503 else
504 cauldron->magic--;
505
506 cauldron->magic -= random_roll (0, 4, op, PREFER_LOW);
507
508 if (rndm (0, 1))
509 {
510 remove_contents (cauldron->inv, NULL);
511 new_draw_info_format (NDI_UNIQUE, 0, op, "Your %s turns darker then makes a gulping sound!", &cauldron->name);
512 }
513 else
514 new_draw_info_format (NDI_UNIQUE, 0, op, "Your %s becomes darker.", &cauldron->name);
515 }
516 else if (level < 110)
517 { /* SUMMON EVIL MONSTERS */
518 object *tmp = get_random_mon (level / 5);
519
520 remove_contents (cauldron->inv, NULL);
521
522 if (!tmp)
523 alchemy_failure_effect (op, cauldron, rp, level);
524 else if (summon_hostile_monsters (cauldron, random_roll (1, 10, op, PREFER_LOW), tmp->arch->archname))
525 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s %s and then pours forth monsters!", &cauldron->name, cauldron_sound ());
526 }
527 else if (level < 150)
528 { /* COMBO EFFECT */
529 int roll = rndm (1, 3);
530
531 while (roll)
532 {
533 alchemy_failure_effect (op, cauldron, rp, level - 39);
534 roll--;
535 }
536 }
537 else if (level == 151)
538 { /* CREATE RANDOM ARTIFACT */
539 object *tmp;
540
541 /* this is meant to be better than prior possiblity,
542 * in this one, we allow *any* valid alchemy artifact
543 * to be made (rather than only those on the given
544 * formulalist) */
545 if (!rp)
546 rp = get_random_recipe ((recipelist *) NULL);
547
548 if (rp && (tmp = get_archetype (rp->arch_name [rndm (rp->arch_names)])))
549 {
550 generate_artifact (tmp, random_roll (1, op->level / 2 + 1, op, PREFER_HIGH) + 1);
551 if ((tmp = insert_ob_in_ob (tmp, cauldron)))
552 {
553 remove_contents (cauldron->inv, tmp);
554 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s %s.", &cauldron->name, cauldron_sound ());
555 }
556 }
557 }
558 else
559 { /* MANA STORM - watch out!! */
560 object *tmp = get_archetype (LOOSE_MANA);
561
562 new_draw_info (NDI_UNIQUE, 0, op, "You unwisely release potent forces!");
563 remove_contents (cauldron->inv, NULL);
564 cast_magic_storm (op, tmp, level);
565 }
566}
567
568/**
569 *"Danger" level, will determine how bad the backfire
570 * could be if the user fails to concoct a recipe properly. Factors include
571 * the number of ingredients, the length of the name of each ingredient,
572 * the user's effective level, the user's Int and the enchantment on the
573 * mixing device (aka "cauldron"). Higher values of 'danger' indicate more
574 * danger. Note that we assume that we have had the caster ready the alchemy
575 * skill *before* this routine is called. (no longer auto-readies that skill)
576 * -b.t.
577 */
578static int
579calc_alch_danger (object *caster, object *cauldron, object *skill, recipe *rp)
580{
581 int danger = 0;
582
583 /* Knowing alchemy skill reduces yer risk */
584 danger -= skill->level;
585
586 /* better cauldrons reduce risk */
587 danger -= cauldron->magic;
588
589 /* Higher Int, lower the risk */
590 danger -= 3 * (caster->stats.Int - 15);
591
592 /* Ingredients. Longer names usually mean rarer stuff.
593 * Thus the backfire is worse. Also, more ingredients
594 * means we are attempting a more powerfull potion,
595 * and thus the backfire will be worse. */
596 for (object *item = cauldron->inv; item; item = item->below)
597 {
598 const char *name = item->title
599 ? format ("%s %s", &item->name, &item->title)
600 : &item->name;
601
602 danger += strtoint (name) / 1000 + 3;
603 }
604
605 if (!rp)
606 danger += 110;
607 else
608 danger += rp->diff * 3;
609
610 /* Using a bad device is *majorly* stupid */
611 if (cauldron->flag [FLAG_CURSED]) danger += 80;
612 if (cauldron->flag [FLAG_DAMNED]) danger += 200;
613
614#ifdef ALCHEMY_DEBUG
615 LOG (llevDebug, "calc_alch_danger() returned danger=%d\n", danger);
616#endif
617
618 return danger;
619}
620
621/**
622 * Determines if ingredients in a container match the
623 * proper ingredients for a recipe.
624 *
625 * rp is the recipe to check
626 * cauldron is the container that holds the ingredients
627 * returns 1 if the ingredients match the recipe, 0 if not
628 *
629 * This functions tries to find each defined ingredient in the container. It is
630 * the defined recipe iff
631 * - the number of ingredients of the recipe and in the container is equal
632 * - all ingredients of the recipe are found in the container
633 * - the number of batches is the same for all ingredients
634 */
635static int
636is_defined_recipe (const recipe *rp, const object *cauldron, object *caster)
637{
638 uint32 batches_in_cauldron;
639 const linked_char *ingredient;
640 int number;
641 const object *ob;
642
643 /* check for matching number of ingredients */
644 number = 0;
645 for (ingredient = rp->ingred; ingredient != NULL; ingredient = ingredient->next)
646 number++;
647 for (ob = cauldron->inv; ob != NULL; ob = ob->below)
648 number--;
649 if (number != 0)
650 return 0;
651
652 /* check for matching ingredients */
653 batches_in_cauldron = 0;
654 for (ingredient = rp->ingred; ingredient != NULL; ingredient = ingredient->next)
655 {
656 uint32 nrof;
657 const char *name;
658 int ok;
659
660 /* determine and remove nrof from name */
661 name = ingredient->name;
662 nrof = 0;
663 while (isdigit (*name))
664 {
665 nrof = 10 * nrof + (*name - '0');
666 name++;
667 }
668 if (nrof == 0)
669 nrof = 1;
670 while (*name == ' ')
671 name++;
672
673 /* find the current ingredient in the cauldron */
674 ok = 0;
675 for (ob = cauldron->inv; ob != NULL; ob = ob->below)
676 {
677 char name_ob[MAX_BUF];
678 const char *name2;
679
680 if (!ob->title)
681 name2 = ob->name;
682 else
683 {
684 snprintf (name_ob, sizeof (name_ob), "%s %s", &ob->name, &ob->title);
685 name2 = name_ob;
686 }
687
688 if (strcmp (name2, name) == 0)
689 {
690 if (ob->nrof % nrof == 0)
691 {
692 uint32 batches;
693
694 batches = ob->nrof / nrof;
695 if (batches_in_cauldron == 0)
696 {
697 batches_in_cauldron = batches;
698 ok = 1;
699 }
700 else if (batches_in_cauldron == batches)
701 ok = 1;
702 }
703 break;
704 }
705 }
706 if (!ok)
707 return (0);
708 }
709
710 return (1);
711}
712
713/**
714 * Find a recipe from a recipe list that matches the given formula. If there
715 * is more than one matching recipe, it selects a random one. If at least one
716 * transmuting recipe matches, it only considers matching transmuting recipes.
717 *
718 * @return one matching recipe, or NULL if no recipe matches
719 */
720static recipe *
721find_recipe (recipelist * fl, int formula, object *ingredients)
722{
723 recipe *rp;
724 recipe *result; /* winning recipe, or NULL if no recipe found */
725 int recipes_matching; /* total number of matching recipes so far */
726 int transmute_found; /* records whether a transmuting recipe was found so far */
727 size_t rp_arch_index;
728
729#ifdef EXTREME_ALCHEMY_DEBUG
730 LOG (llevDebug, "looking for formula %d:\n", formula);
731#endif
732 result = NULL;
733 recipes_matching = 0;
734 transmute_found = 0;
735
736 for (rp = fl->items; rp; rp = rp->next)
737 {
738 /* check if recipe matches at all */
739 if (formula % rp->index != 0)
740 {
741#ifdef EXTREME_ALCHEMY_DEBUG
742 LOG (llevDebug, " formula %s of %s (%d) does not match\n", rp->arch_name[0], &rp->title, rp->index);
743#endif
744 continue;
745 }
746
747 if (rp->transmute && find_transmution_ob (ingredients, rp, &rp_arch_index, 0) != NULL)
748 {
749#ifdef EXTREME_ALCHEMY_DEBUG
750 LOG (llevDebug, " formula %s of %s (%d) is a matching transmuting formula\n", rp->arch_name[rp_arch_index], &rp->title, rp->index);
751#endif
752 /* transmution recipe with matching base ingredient */
753 if (!transmute_found)
754 {
755 transmute_found = 1;
756 recipes_matching = 0;
757 }
758 }
759 else if (transmute_found)
760 {
761#ifdef EXTREME_ALCHEMY_DEBUG
762 LOG (llevDebug, " formula %s of %s (%d) matches but is not a matching transmuting formula\n", rp->arch_name[0], &rp->title,
763 rp->index);
764#endif
765 /* "normal" recipe found after previous transmution recipe => ignore this recipe */
766 continue;
767 }
768#ifdef EXTREME_ALCHEMY_DEBUG
769 else
770 {
771 LOG (llevDebug, " formula %s of %s (%d) matches\n", rp->arch_name[0], &rp->title, rp->index);
772 }
773#endif
774
775 if (rndm (0, recipes_matching) == 0)
776 result = rp;
777
778 recipes_matching++;
779 }
780
781 if (result == NULL)
782 {
783#ifdef ALCHEMY_DEBUG
784 LOG (llevDebug, "couldn't find formula for ingredients.\n");
785#endif
786 return NULL;
787 }
788
789#ifdef ALCHEMY_DEBUG
790 if (strcmp (result->title, "NONE") != 0)
791 LOG (llevDebug, "got formula: %s of %s (nbatches:%d)\n", result->arch_name[0], &result->title, formula / result->index);
792 else
793 LOG (llevDebug, "got formula: %s (nbatches:%d)\n", result->arch_name[0], formula / result->index);
794#endif
795 return result;
796}
797
798/**
77 * Main part of the ALCHEMY code. From this we call fctns 799 * Main part of the ALCHEMY code. From this we call fctns
78 * that take a look at the contents of the 'cauldron' and, using these ingredients, 800 * that take a look at the contents of the 'cauldron' and, using these ingredients,
79 * we construct an integer formula value which is referenced (randomly) against a 801 * we construct an integer formula value which is referenced (randomly) against a
80 * formula list (the formula list chosen is based on the # contents of the cauldron). 802 * formula list (the formula list chosen is based on the # contents of the cauldron).
81 * 803 *
… …
94 * There is no good reason (in my mind) why alchemical processes have to be 816 * There is no good reason (in my mind) why alchemical processes have to be
95 * unique -- such a 'feature' is one reason why players might want to experiment 817 * unique -- such a 'feature' is one reason why players might want to experiment
96 * around. :) 818 * around. :)
97 * -b.t. 819 * -b.t.
98 */ 820 */
99
100void 821void
101attempt_do_alchemy (object *caster, object *cauldron) 822attempt_do_alchemy (object *caster, object *cauldron, object *skill)
102{ 823{
103 recipelist *fl; 824 recipelist *fl;
104 recipe *rp = NULL; 825 recipe *rp = NULL;
105 float success_chance; 826 float success_chance;
106 int numb, ability = 1; 827 int numb, ability = 1;
… …
122 return; 843 return;
123 844
124 numb = numb_ob_inside (cauldron); 845 numb = numb_ob_inside (cauldron);
125 if ((fl = get_formulalist (numb))) 846 if ((fl = get_formulalist (numb)))
126 { 847 {
127 if (QUERY_FLAG (caster, FLAG_WIZ)) 848 if (caster->flag [FLAG_WIZ])
128 { 849 {
129 rp = find_recipe (fl, formula, cauldron->inv); 850 rp = find_recipe (fl, formula, cauldron->inv);
130 if (rp != NULL) 851 if (rp != NULL)
131 { 852 {
132#ifdef ALCHEMY_DEBUG 853#ifdef ALCHEMY_DEBUG
133 if (strcmp (rp->title, "NONE")) 854 if (strcmp (rp->title, "NONE"))
134 LOG (llevDebug, "WIZ got formula: %s of %s\n", rp->arch_name[0], rp->title); 855 LOG (llevDebug, "WIZ got formula: %s of %s\n", rp->arch_name[0], &rp->title);
135 else 856 else
136 LOG (llevDebug, "WIZ got formula: %s (nbatches:%d)\n", rp->arch_name[0], formula / rp->index); 857 LOG (llevDebug, "WIZ got formula: %s (nbatches:%d)\n", rp->arch_name[0], formula / rp->index);
137#endif 858#endif
138 attempt_recipe (caster, cauldron, ability, rp, formula / rp->index); 859 attempt_recipe (caster, cauldron, ability, rp, formula / rp->index);
139 } 860 }
… …
142 return; 863 return;
143 } /* End of WIZ alchemy */ 864 } /* End of WIZ alchemy */
144 865
145 /* find the recipe */ 866 /* find the recipe */
146 rp = find_recipe (fl, formula, cauldron->inv); 867 rp = find_recipe (fl, formula, cauldron->inv);
147 if (rp) 868 if (rp
869 && rp->skill == skill->skill
870 && (!rp->cauldron
871 || rp->cauldron == cauldron->arch->archname))
148 { 872 {
149 uint64 value_ingredients; 873 uint64 value_ingredients;
150 uint64 value_item; 874 uint64 value_item;
151 object *tmp; 875 object *tmp;
152 int attempt_shadow_alchemy; 876 int attempt_shadow_alchemy;
153 877
154 ave_chance = fl->total_chance / (float) fl->number; 878 ave_chance = fl->total_chance / (float)fl->number;
155 /* the caster gets an increase in ability based on thier skill lvl */ 879
156 if (rp->skill)
157 {
158 skop = find_skill_by_name (caster, rp->skill);
159 if (!skop)
160 {
161 new_draw_info (NDI_UNIQUE, 0, caster, "You do not have the proper skill for this recipe");
162 }
163 else
164 {
165 ability += (int) (skop->level * ((4.0 + cauldron->magic) / 4.0)); 880 ability += skill->level * ((4.0 + cauldron->magic) / 4.0);
166 }
167 }
168 else
169 {
170 LOG (llevDebug, "Recipe %s has NULL skill!\n", &rp->title);
171 return;
172 }
173
174 if (rp->cauldron)
175 {
176 LOG (llevDebug, "Recipe %s has NULL cauldron!\n", &rp->title);
177 return;
178 }
179 881
180 /* determine value of ingredients */ 882 /* determine value of ingredients */
181 value_ingredients = 0; 883 value_ingredients = 0;
182 for (tmp = cauldron->inv; tmp != NULL; tmp = tmp->below) 884 for (tmp = cauldron->inv; tmp; tmp = tmp->below)
183 value_ingredients += query_cost (tmp, NULL, F_TRUE); 885 value_ingredients += query_cost (tmp, NULL, F_TRUE);
184 886
185 attempt_shadow_alchemy = !is_defined_recipe (rp, cauldron, caster); 887 attempt_shadow_alchemy = !is_defined_recipe (rp, cauldron, caster);
186 888
187 /* create the object **FIRST**, then decide whether to keep it. */ 889 /* create the object **FIRST**, then decide whether to keep it. */
… …
198 900
199 value_item = query_cost (item, NULL, F_TRUE | F_IDENTIFIED | F_NOT_CURSED); 901 value_item = query_cost (item, NULL, F_TRUE | F_IDENTIFIED | F_NOT_CURSED);
200 if (attempt_shadow_alchemy && value_item > value_ingredients) 902 if (attempt_shadow_alchemy && value_item > value_ingredients)
201 { 903 {
202#ifdef ALCHEMY_DEBUG 904#ifdef ALCHEMY_DEBUG
203# ifndef WIN32
204 LOG (llevDebug, 905 LOG (llevDebug,
205 "Forcing failure for shadow alchemy recipe because price of ingredients (%llu) is less than price of result (%llu).\n", 906 "Forcing failure for shadow alchemy recipe because price of ingredients (%llu) is less than price of result (%llu).\n",
206 value_ingredients, value_item); 907 value_ingredients, value_item);
207# else
208 LOG (llevDebug,
209 "Forcing failure for shadow alchemy recipe because price of ingredients (%I64d) is less than price of result (%I64d).\n",
210 value_ingredients, value_item);
211# endif
212#endif 908#endif
213 } 909 }
214 /* roll the dice */ 910 /* roll the dice */
215 else if ((float) (random_roll (0, 101, caster, PREFER_LOW)) <= 100.0 * success_chance) 911 else if (random_roll (0, 101, caster, PREFER_LOW) <= 100.0 * success_chance)
216 { 912 {
217 change_exp (caster, rp->exp, rp->skill, SK_EXP_NONE); 913 change_exp (caster, rp->exp, rp->skill, SK_EXP_NONE);
914
915 // let alchemy consume some time, so that exploits are less easy
916 caster->speed_left -= 1.0;
917
218 return; 918 return;
219 } 919 }
220 } 920 }
221 } 921 }
222 } 922 }
923
223 /* if we get here, we failed!! */ 924 /* if we get here, we failed!! */
224 alchemy_failure_effect (caster, cauldron, rp, calc_alch_danger (caster, cauldron, rp)); 925 alchemy_failure_effect (caster, cauldron, rp, calc_alch_danger (caster, cauldron, skill, rp));
225} 926}
226 927
227/**
228 * Recipe value of the entire contents of a container.
229 * This appears to just generate a hash value, which I guess for now works
230 * ok, but the possibility of duplicate hashes is certainly possible - msw
231 */
232
233int
234content_recipe_value (object *op)
235{
236 char name[MAX_BUF];
237 object *tmp = op->inv;
238 int tval = 0, formula = 0;
239
240 while (tmp)
241 {
242 tval = 0;
243 strcpy (name, tmp->name);
244 if (tmp->title)
245 sprintf (name, "%s %s", &tmp->name, &tmp->title);
246 tval = (strtoint (name) * (tmp->nrof ? tmp->nrof : 1));
247#ifdef ALCHEMY_DEBUG
248 LOG (llevDebug, "Got ingredient %d %s(%d)\n", tmp->nrof ? tmp->nrof : 1, name, tval);
249#endif
250 formula += tval;
251 tmp = tmp->below;
252 }
253#ifdef ALCHEMY_DEBUG
254 LOG (llevDebug, " Formula value=%d\n", formula);
255#endif
256 return formula;
257}
258
259/**
260 * Returns total number of items in op
261 */
262
263int
264numb_ob_inside (object *op)
265{
266 object *tmp = op->inv;
267 int number = 0, o_number = 0;
268
269 while (tmp)
270 {
271 if (tmp->nrof)
272 number += tmp->nrof;
273 else
274 number++;
275 o_number++;
276 tmp = tmp->below;
277 }
278#ifdef ALCHEMY_DEBUG
279 LOG (llevDebug, "numb_ob_inside(%s): found %d ingredients\n", op->name, o_number);
280#endif
281 return o_number;
282}
283
284/**
285 * Essentially a wrapper for make_item_from_recipe() and
286 * insert_ob_in_ob. If the caster has some alchemy skill, then they might
287 * gain some exp from (successfull) fabrication of the product.
288 * If nbatches==-1, don't give exp for this creation (random generation/
289 * failed recipe)
290 */
291
292object *
293attempt_recipe (object *caster, object *cauldron, int ability, recipe *rp, int nbatches)
294{
295
296 object *item = NULL, *skop;
297
298 /* this should be passed to this fctn, not effiecent cpu use this way */
299 int batches = abs (nbatches);
300
301
302 LOG (llevDebug, "A %s <=> %s\n", &(rp->cauldron), &(cauldron->arch->name));
303 /* is the cauldron the right type? */
304 if (strcmp (rp->cauldron, cauldron->arch->name) != 0)
305 {
306 new_draw_info (NDI_UNIQUE, 0, caster, "You are not using the proper" " facilities for this formula.");
307 return 0;
308 }
309
310 skop = find_skill_by_name (caster, rp->skill);
311 /* does the caster have the skill? */
312 if (!skop)
313 return 0;
314
315 /* code required for this recipe, search the caster */
316 if (rp->keycode)
317 {
318 object *tmp;
319
320 for (tmp = caster->inv; tmp != NULL; tmp = tmp->below)
321 {
322 if (tmp->type == FORCE && tmp->slaying && !strcmp (rp->keycode, tmp->slaying))
323 break;
324 }
325 if (tmp == NULL)
326 { /* failure--no code found */
327 new_draw_info (NDI_UNIQUE, 0, caster, "You know the ingredients," " but not the technique. Go learn how to do this recipe.");
328 return 0;
329 }
330 }
331
332#ifdef EXTREME_ALCHEMY_DEBUG
333 LOG (llevDebug, "attempt_recipe(): got %d nbatches\n", nbatches);
334 LOG (llevDebug, "attempt_recipe(): using recipe %s\n", rp->title ? rp->title : "unknown");
335#endif
336
337 if ((item = make_item_from_recipe (cauldron, rp)) != NULL)
338 {
339 remove_contents (cauldron->inv, item);
340 /* Recalc carrying of the cauldron, in case recipe did not conserve mass */
341 sum_weight (cauldron);
342 /* adj lvl, nrof on caster level */
343 adjust_product (item, ability, rp->yield ? (rp->yield * batches) : batches);
344 if (!item->env && (item = insert_ob_in_ob (item, cauldron)) == NULL)
345 {
346 new_draw_info (NDI_UNIQUE, 0, caster, "Nothing happened.");
347 /* new_draw_info_format(NDI_UNIQUE, 0,caster,
348 "Your spell causes the %s to explode!",&cauldron->name); */
349 /* kaboom_cauldron(); */
350 }
351 else
352 {
353 new_draw_info_format (NDI_UNIQUE, 0, caster, "The %s %s.", &cauldron->name, cauldron_sound ());
354 }
355 }
356 return item;
357}
358
359
360
361/**
362 * We adjust the nrof, exp and level of the final product, based
363 * on the item's default parameters, and the relevant caster skill level.
364 */
365 void
366adjust_product (object *item, int lvl, int yield)
367{
368 int nrof = 1;
369
370 if (!yield)
371 yield = 1;
372 if (lvl <= 0)
373 lvl = 1; /* lets avoid div by zero! */
374 if (item->nrof)
375 {
376 nrof = (int) ((1.0 - 1.0 / (lvl / 10.0 + 1.0)) * (rndm (0, yield - 1) + rndm (0, yield - 1) + rndm (0, yield - 1)) + 1);
377 if (nrof > yield)
378 nrof = yield;
379 item->nrof = nrof;
380 }
381}
382
383
384/**
385 * Using a list of items and a recipe to make an artifact.
386 *
387 * @param cauldron the cauldron (including the ingredients) used to make the item
388 *
389 * @param rp the recipe to make the artifact from
390 *
391 * @return the newly created object, NULL if something failed
392 */
393
394object *
395make_item_from_recipe (object *cauldron, recipe *rp)
396{
397 artifact *art = NULL;
398 object *item = NULL;
399 size_t rp_arch_index;
400
401 if (rp == NULL)
402 return (object *) NULL;
403
404 /* Find the appropriate object to transform... */
405 if ((item = find_transmution_ob (cauldron->inv, rp, &rp_arch_index, 1)) == NULL)
406 {
407 LOG (llevDebug, "make_alchemy_item(): failed to create alchemical object.\n");
408 return (object *) NULL;
409 }
410
411 /* Find the appropriate artifact template... */
412 if (strcmp (rp->title, "NONE"))
413 {
414 if ((art = locate_recipe_artifact (rp, rp_arch_index)) == NULL)
415 {
416 LOG (llevError, "make_alchemy_item(): failed to locate recipe artifact.\n");
417 LOG (llevDebug, " --requested recipe: %s of %s.\n", rp->arch_name[0], &rp->title);
418 return (object *) NULL;
419 }
420 transmute_materialname (item, art->item);
421 give_artifact_abilities (item, art->item);
422 }
423
424 if (QUERY_FLAG (cauldron, FLAG_CURSED))
425 SET_FLAG (item, FLAG_CURSED);
426 if (QUERY_FLAG (cauldron, FLAG_DAMNED))
427 SET_FLAG (item, FLAG_DAMNED);
428
429 return item;
430}
431
432
433/**
434 * Looks through the ingredient list. If we find a
435 * suitable object in it - we will use that to make the requested artifact.
436 * Otherwise the code returns a 'generic' item if create_item is set. -b.t.
437 *
438 * @param rp_arch_index pointer to return value; set to arch index for recipe;
439 * set to zero if not using a transmution formula
440 */
441
442object *
443find_transmution_ob (object *first_ingred, recipe *rp, size_t * rp_arch_index, int create_item)
444{
445 object *item = NULL;
446
447 *rp_arch_index = 0;
448
449 if (rp->transmute) /* look for matching ingredient/prod archs */
450 for (item = first_ingred; item; item = item->below)
451 {
452 size_t i;
453
454 for (i = 0; i < rp->arch_names; i++)
455 {
456 if (strcmp (item->arch->name, rp->arch_name[i]) == 0)
457 {
458 *rp_arch_index = i;
459 break;
460 }
461 }
462 if (i < rp->arch_names)
463 break;
464 }
465
466 /* failed, create a fresh object. Note no nrof>1 because that would
467 * allow players to create massive amounts of artifacts easily */
468 if (create_item && (!item || item->nrof > 1))
469 {
470 *rp_arch_index = RANDOM () % rp->arch_names;
471 item = get_archetype (rp->arch_name[*rp_arch_index]);
472 }
473
474#ifdef ALCHEMY_DEBUG
475 LOG (llevDebug, "recipe calls for%stransmution.\n", rp->transmute ? " " : " no ");
476 if (item != NULL)
477 {
478 LOG (llevDebug, " find_transmutable_ob(): returns arch %s(sp:%d)\n", item->arch->name, item->stats.sp);
479 }
480#endif
481
482 return item;
483}
484
485
486/**
487 * Ouch. We didnt get the formula we wanted.
488 * This fctn simulates the backfire effects--worse effects as the level
489 * increases. If SPELL_FAILURE_EFFECTS is defined some really evil things
490 * can happen to the would be alchemist. This table probably needs some
491 * adjustment for playbalance. -b.t.
492 */
493
494void
495alchemy_failure_effect (object *op, object *cauldron, recipe *rp, int danger)
496{
497 int level = 0;
498
499 if (!op || !cauldron)
500 return;
501
502 if (danger > 1)
503 level = random_roll (1, danger, op, PREFER_LOW);
504
505#ifdef ALCHEMY_DEBUG
506 LOG (llevDebug, "Alchemy_failure_effect(): using level=%d\n", level);
507#endif
508
509 /* possible outcomes based on level */
510 if (level < 25)
511 { /* INGREDIENTS USED/SLAGGED */
512 object *item = NULL;
513
514 if (rndm (0, 2))
515 { /* slag created */
516 object *tmp = cauldron->inv;
517 int weight = 0;
518 uint16 material = M_STONE;
519
520 while (tmp)
521 { /* slag has coadded ingredient properties */
522 weight += tmp->weight;
523 if (!(material & tmp->material))
524 material |= tmp->material;
525 tmp = tmp->below;
526 }
527 tmp = get_archetype ("rock");
528 tmp->weight = weight;
529 tmp->value = 0;
530 tmp->material = material;
531 tmp->materialname = "stone";
532 tmp->name = "slag";
533 tmp->name_pl = "slags";
534 item = insert_ob_in_ob (tmp, cauldron);
535 CLEAR_FLAG (tmp, FLAG_CAN_ROLL);
536 CLEAR_FLAG (tmp, FLAG_NO_PICK);
537 tmp->move_block = 0;
538 }
539 remove_contents (cauldron->inv, item);
540 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s %s.", &cauldron->name, cauldron_sound ());
541 return;
542 }
543 else if (level < 40)
544 { /* MAKE TAINTED ITEM */
545 object *tmp = NULL;
546
547 if (!rp)
548 if ((rp = get_random_recipe ((recipelist *) NULL)) == NULL)
549 return;
550
551 if ((tmp = attempt_recipe (op, cauldron, 1, rp, -1)))
552 {
553 if (!QUERY_FLAG (tmp, FLAG_CURSED)) /* curse it */
554 SET_FLAG (tmp, FLAG_CURSED);
555
556 /* the apply code for potions already deals with cursed
557 * potions, so any code here is basically ignored.
558 */
559 if (tmp->type == FOOD)
560 {
561 tmp->stats.hp = random_roll (0, 149, op, PREFER_LOW);
562 }
563 tmp->value = 0; /* unsaleable item */
564
565 /* change stats downward */
566 do
567 {
568 change_attr_value (&tmp->stats, rndm (0, 6), -1 * (rndm (1, 3)));
569 }
570 while (rndm (0, 2));
571 }
572 return;
573 }
574 if (level == 40)
575 { /* MAKE RANDOM RECIPE */
576 recipelist *fl;
577 int numb = numb_ob_inside (cauldron);
578
579 fl = get_formulalist (numb - 1); /* take a lower recipe list */
580 if (fl && (rp = get_random_recipe (fl)))
581 /* even though random, don't grant user any EXP for it */
582 (void) attempt_recipe (op, cauldron, 1, rp, -1);
583 else
584 alchemy_failure_effect (op, cauldron, rp, level - 1);
585 return;
586
587 }
588 else if (level < 45)
589 { /* INFURIATE NPC's */
590 /* this is kind of kludgy I know... */
591 cauldron->enemy = op;
592 npc_call_help (cauldron);
593 cauldron->enemy = NULL;
594
595 alchemy_failure_effect (op, cauldron, rp, level - 5);
596 return;
597 }
598 else if (level < 50)
599 { /* MINOR EXPLOSION/FIREBALL */
600 object *tmp;
601
602 remove_contents (cauldron->inv, NULL);
603 switch (rndm (0, 2))
604 {
605 case 0:
606 tmp = get_archetype ("bomb");
607 tmp->stats.dam = random_roll (1, level, op, PREFER_LOW);
608 tmp->stats.hp = random_roll (1, level, op, PREFER_LOW);
609 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s creates a bomb!", &cauldron->name);
610 break;
611
612 default:
613 tmp = get_archetype ("fireball");
614 tmp->stats.dam = random_roll (1, level, op, PREFER_LOW) / 5 + 1;
615 tmp->stats.hp = random_roll (1, level, op, PREFER_LOW) / 10 + 2;
616 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s erupts in flame!", &cauldron->name);
617 break;
618 }
619 tmp->x = cauldron->x, tmp->y = cauldron->y;
620 insert_ob_in_map (tmp, op->map, NULL, 0);
621 return;
622
623 }
624 else if (level < 60)
625 { /* CREATE MONSTER */
626 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s %s.", &cauldron->name, cauldron_sound ());
627 remove_contents (cauldron->inv, NULL);
628 return;
629 }
630 else if (level < 80)
631 { /* MAJOR FIRE */
632 object *fb = get_archetype (SP_MED_FIREBALL);
633
634 remove_contents (cauldron->inv, NULL);
635 fire_arch_from_position (cauldron, cauldron, cauldron->x, cauldron->y, 0, fb);
636 free_object (fb);
637 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s erupts in flame!", &cauldron->name);
638 return;
639
640 }
641 else if (level < 100)
642 { /* WHAMMY the CAULDRON */
643 if (!QUERY_FLAG (cauldron, FLAG_CURSED))
644 SET_FLAG (cauldron, FLAG_CURSED);
645 else
646 cauldron->magic--;
647 cauldron->magic -= random_roll (0, 4, op, PREFER_LOW);
648 if (rndm (0, 1))
649 {
650 remove_contents (cauldron->inv, NULL);
651 new_draw_info_format (NDI_UNIQUE, 0, op, "Your %s turns darker then makes a gulping sound!", &cauldron->name);
652 }
653 else
654 new_draw_info_format (NDI_UNIQUE, 0, op, "Your %s becomes darker.", &cauldron->name);
655 return;
656
657 }
658 else if (level < 110)
659 { /* SUMMON EVIL MONSTERS */
660 object *tmp = get_random_mon (level / 5);
661
662 remove_contents (cauldron->inv, NULL);
663 if (!tmp)
664 alchemy_failure_effect (op, cauldron, rp, level);
665 else if (summon_hostile_monsters (cauldron, random_roll (1, 10, op, PREFER_LOW), tmp->arch->name))
666 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s %s and then pours forth monsters!", &cauldron->name, cauldron_sound ());
667 return;
668
669 }
670 else if (level < 150)
671 { /* COMBO EFFECT */
672 int roll = rndm (1, 3);
673
674 while (roll)
675 {
676 alchemy_failure_effect (op, cauldron, rp, level - 39);
677 roll--;
678 }
679 return;
680 }
681 else if (level == 151)
682 { /* CREATE RANDOM ARTIFACT */
683 object *tmp;
684
685 /* this is meant to be better than prior possiblity,
686 * in this one, we allow *any* valid alchemy artifact
687 * to be made (rather than only those on the given
688 * formulalist) */
689 if (!rp)
690 rp = get_random_recipe ((recipelist *) NULL);
691 if (rp && (tmp = get_archetype (rp->arch_name[RANDOM () % rp->arch_names])))
692 {
693 generate_artifact (tmp, random_roll (1, op->level / 2 + 1, op, PREFER_HIGH) + 1);
694 if ((tmp = insert_ob_in_ob (tmp, cauldron)))
695 {
696 remove_contents (cauldron->inv, tmp);
697 new_draw_info_format (NDI_UNIQUE, 0, op, "The %s %s.", &cauldron->name, cauldron_sound ());
698 }
699 }
700 return;
701 }
702 else
703 { /* MANA STORM - watch out!! */
704 object *tmp = get_archetype (LOOSE_MANA);
705
706 new_draw_info (NDI_UNIQUE, 0, op, "You unwisely release potent forces!");
707 remove_contents (cauldron->inv, NULL);
708 cast_magic_storm (op, tmp, level);
709 return;
710 }
711}
712
713
714/**
715 * All but object "save_item" are elimentated from
716 * the container list. Note we have to becareful to remove the inventories
717 * of objects in the cauldron inventory (ex icecube has stuff in it).
718 */
719
720void
721remove_contents (object *first_ob, object *save_item)
722{
723 object *next, *tmp = first_ob;
724
725 while (tmp)
726 {
727 next = tmp->below;
728 if (tmp == save_item)
729 {
730 if (!(tmp = next))
731 break;
732 else
733 next = next->below;
734 }
735 if (tmp->inv)
736 remove_contents (tmp->inv, NULL);
737 remove_ob (tmp);
738 free_object (tmp);
739 tmp = next;
740 }
741}
742
743/**
744 *"Danger" level, will determine how bad the backfire
745 * could be if the user fails to concoct a recipe properly. Factors include
746 * the number of ingredients, the length of the name of each ingredient,
747 * the user's effective level, the user's Int and the enchantment on the
748 * mixing device (aka "cauldron"). Higher values of 'danger' indicate more
749 * danger. Note that we assume that we have had the caster ready the alchemy
750 * skill *before* this routine is called. (no longer auto-readies that skill)
751 * -b.t.
752 */
753
754int
755calc_alch_danger (object *caster, object *cauldron, recipe *rp)
756{
757 object *item;
758 char name[MAX_BUF];
759 int danger = 0, nrofi = 0;
760
761 /* Knowing alchemy skill reduces yer risk */
762 danger -= caster->chosen_skill ? caster->chosen_skill->level : caster->level;
763
764 /* better cauldrons reduce risk */
765 danger -= cauldron->magic;
766
767 /* Higher Int, lower the risk */
768 danger -= 3 * (caster->stats.Int - 15);
769
770 /* Ingredients. Longer names usually mean rarer stuff.
771 * Thus the backfire is worse. Also, more ingredients
772 * means we are attempting a more powerfull potion,
773 * and thus the backfire will be worse. */
774 for (item = cauldron->inv; item; item = item->below)
775 {
776 strcpy (name, item->name);
777 if (item->title)
778 sprintf (name, "%s %s", &item->name, &item->title);
779 danger += (strtoint (name) / 1000) + 3;
780 nrofi++;
781 }
782 if (rp == NULL)
783 danger += 110;
784 else
785 danger += rp->diff * 3;
786
787 /* Using a bad device is *majorly* stupid */
788 if (QUERY_FLAG (cauldron, FLAG_CURSED))
789 danger += 80;
790 if (QUERY_FLAG (cauldron, FLAG_DAMNED))
791 danger += 200;
792
793#ifdef ALCHEMY_DEBUG
794 LOG (llevDebug, "calc_alch_danger() returned danger=%d\n", danger);
795#endif
796
797 return danger;
798}
799
800/**
801 * Determines if ingredients in a container match the
802 * proper ingredients for a recipe.
803 *
804 * rp is the recipe to check
805 * cauldron is the container that holds the ingredients
806 * returns 1 if the ingredients match the recipe, 0 if not
807 *
808 * This functions tries to find each defined ingredient in the container. It is
809 * the defined recipe iff
810 * - the number of ingredients of the recipe and in the container is equal
811 * - all ingredients of the recipe are found in the container
812 * - the number of batches is the same for all ingredients
813 */
814static int
815is_defined_recipe (const recipe *rp, const object *cauldron, object *caster)
816{
817 uint32 batches_in_cauldron;
818 const linked_char *ingredient;
819 int number;
820 const object *ob;
821
822 /* check for matching number of ingredients */
823 number = 0;
824 for (ingredient = rp->ingred; ingredient != NULL; ingredient = ingredient->next)
825 number++;
826 for (ob = cauldron->inv; ob != NULL; ob = ob->below)
827 number--;
828 if (number != 0)
829 return 0;
830
831 /* check for matching ingredients */
832 batches_in_cauldron = 0;
833 for (ingredient = rp->ingred; ingredient != NULL; ingredient = ingredient->next)
834 {
835 uint32 nrof;
836 const char *name;
837 int ok;
838
839 /* determine and remove nrof from name */
840 name = ingredient->name;
841 nrof = 0;
842 while (isdigit (*name))
843 {
844 nrof = 10 * nrof + (*name - '0');
845 name++;
846 }
847 if (nrof == 0)
848 nrof = 1;
849 while (*name == ' ')
850 name++;
851
852 /* find the current ingredient in the cauldron */
853 ok = 0;
854 for (ob = cauldron->inv; ob != NULL; ob = ob->below)
855 {
856 char name_ob[MAX_BUF];
857 const char *name2;
858
859 if (ob->title == NULL)
860 name2 = ob->name;
861 else
862 {
863 snprintf (name_ob, sizeof (name_ob), "%s %s", &ob->name, &ob->title);
864 name2 = name_ob;
865 }
866
867 if (strcmp (name2, name) == 0)
868 {
869 if (ob->nrof % nrof == 0)
870 {
871 uint32 batches;
872
873 batches = ob->nrof / nrof;
874 if (batches_in_cauldron == 0)
875 {
876 batches_in_cauldron = batches;
877 ok = 1;
878 }
879 else if (batches_in_cauldron == batches)
880 ok = 1;
881 }
882 break;
883 }
884 }
885 if (!ok)
886 return (0);
887 }
888
889 return (1);
890}
891
892/**
893 * Find a recipe from a recipe list that matches the given formula. If there
894 * is more than one matching recipe, it selects a random one. If at least one
895 * transmuting recipe matches, it only considers matching transmuting recipes.
896 *
897 * @return one matching recipe, or NULL if no recipe matches
898 */
899static recipe *
900find_recipe (recipelist * fl, int formula, object *ingredients)
901{
902 recipe *rp;
903 recipe *result; /* winning recipe, or NULL if no recipe found */
904 int recipes_matching; /* total number of matching recipes so far */
905 int transmute_found; /* records whether a transmuting recipe was found so far */
906 size_t rp_arch_index;
907
908#ifdef EXTREME_ALCHEMY_DEBUG
909 LOG (llevDebug, "looking for formula %d:\n", formula);
910#endif
911 result = NULL;
912 recipes_matching = 0;
913 transmute_found = 0;
914 for (rp = fl->items; rp != NULL; rp = rp->next)
915 {
916 /* check if recipe matches at all */
917 if (formula % rp->index != 0)
918 {
919#ifdef EXTREME_ALCHEMY_DEBUG
920 LOG (llevDebug, " formula %s of %s (%d) does not match\n", rp->arch_name[0], rp->title, rp->index);
921#endif
922 continue;
923 }
924
925 if (rp->transmute && find_transmution_ob (ingredients, rp, &rp_arch_index, 0) != NULL)
926 {
927#ifdef EXTREME_ALCHEMY_DEBUG
928 LOG (llevDebug, " formula %s of %s (%d) is a matching transmuting formula\n", rp->arch_name[rp_arch_index], rp->title, rp->index);
929#endif
930 /* transmution recipe with matching base ingredient */
931 if (!transmute_found)
932 {
933 transmute_found = 1;
934 recipes_matching = 0;
935 }
936 }
937 else if (transmute_found)
938 {
939#ifdef EXTREME_ALCHEMY_DEBUG
940 LOG (llevDebug, " formula %s of %s (%d) matches but is not a matching transmuting formula\n", rp->arch_name[0], rp->title,
941 rp->index);
942#endif
943 /* "normal" recipe found after previous transmution recipe => ignore this recipe */
944 continue;
945 }
946#ifdef EXTREME_ALCHEMY_DEBUG
947 else
948 {
949 LOG (llevDebug, " formula %s of %s (%d) matches\n", rp->arch_name[0], rp->title, rp->index);
950 }
951#endif
952
953 if (rndm (0, recipes_matching) == 0)
954 result = rp;
955
956 recipes_matching++;
957 }
958
959 if (result == NULL)
960 {
961#ifdef ALCHEMY_DEBUG
962 LOG (llevDebug, "couldn't find formula for ingredients.\n");
963#endif
964 return NULL;
965 }
966
967#ifdef ALCHEMY_DEBUG
968 if (strcmp (result->title, "NONE") != 0)
969 LOG (llevDebug, "got formula: %s of %s (nbatches:%d)\n", result->arch_name[0], result->title, formula / result->index);
970 else
971 LOG (llevDebug, "got formula: %s (nbatches:%d)\n", result->arch_name[0], formula / result->index);
972#endif
973 return result;
974}

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