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Comparing deliantra/server/server/spell_util.C (file contents):
Revision 1.60 by root, Sun Sep 2 05:18:52 2007 UTC vs.
Revision 1.70 by root, Sun May 4 18:24:11 2008 UTC

1/* 1/*
2 * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * 3 *
4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team 4 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (©) 2001,2007 Mark Wedel & Crossfire Development Team 5 * Copyright (©) 2001,2007 Mark Wedel & Crossfire Development Team
6 * Copyright (©) 1992,2007 Frank Tore Johansen 6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 * 7 *
8 * Crossfire TRT is free software: you can redistribute it and/or modify 8 * Deliantra is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by 9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or 10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version. 11 * (at your 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,
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 GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>. 19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * 20 *
21 * The authors can be reached via e-mail to <crossfire@schmorp.de> 21 * The authors can be reached via e-mail to <support@deliantra.net>
22 */ 22 */
23 23
24#include <global.h> 24#include <global.h>
25#include <spells.h> 25#include <spells.h>
26#include <object.h> 26#include <object.h>
77 dest->skill = spob->skill; 77 dest->skill = spob->skill;
78 else 78 else
79 dest->skill = caster->skill; 79 dest->skill = caster->skill;
80} 80}
81 81
82/* init_spells: This should really be called check_spells, as that
83 * is what it does. It goes through the spells looking for any
84 * obvious errors. This was most useful in debugging when re-doing
85 * all the spells to catch simple errors. To use it all the time
86 * will result in it spitting out messages that aren't really errors.
87 */
88void
89init_spells (void)
90{
91#ifdef SPELL_DEBUG
92 static int init_spells_done = 0;
93 int i;
94 archetype *at;
95
96 if (init_spells_done)
97 return;
98 LOG (llevDebug, "Checking spells...\n");
99
100 for_all_archetypes (at)
101 {
102 if (at->type == SPELL)
103 {
104 if (at->skill)
105 {
106 for (i = 1; i < NUM_SKILLS; i++)
107 if (!strcmp (skill_names[i], at->skill))
108 break;
109 if (i == NUM_SKILLS)
110 {
111 LOG (llevError, "Spell %s has improper associated skill %s\n", at->name, at->skill);
112 }
113 }
114 /* other_arch is already checked for in the loader */
115 }
116 }
117
118 i = 0;
119 while (spell_mapping[i])
120 {
121 if (!archetype::find (spell_mapping[i]))
122 {
123 LOG (llevError, "Unable to find spell mapping %s (%i)\n", spell_mapping[i], i);
124 }
125 i++;
126 }
127 LOG (llevDebug, "Checking spells completed.\n");
128#endif
129}
130
131/* Dumps all the spells - now also dumps skill associated with the spell.
132 * not sure what this would be used for, as the data seems pretty
133 * minimal, but easy enough to keep around.
134 */
135void
136dump_spells ()
137{
138 for_all_archetypes (at)
139 if (at->type == SPELL)
140 fprintf (stderr, "%s:%s:%s:%s:%d\n", &at->object::name,
141 &at->archname, at->other_arch ? &at->other_arch->archname : "<nil>", &at->skill, at->level);
142}
143
144/* pretty basic function - basically just takes 82/* pretty basic function - basically just takes
145 * an object, sets the x,y, and calls insert_ob_in_map 83 * an object, sets the x,y, and calls insert_ob_in_map
146 */ 84 */
147void 85void
148spell_effect (object *spob, int x, int y, maptile *map, object *originator) 86spell_effect (object *spob, int x, int y, maptile *map, object *originator)
162 * Returns modified level. 100 * Returns modified level.
163 */ 101 */
164int 102int
165min_casting_level (object *caster, object *spell) 103min_casting_level (object *caster, object *spell)
166{ 104{
167 int new_level;
168
169 if (caster->path_denied & spell->path_attuned) 105 if (caster->path_denied & spell->path_attuned)
170 return 1; 106 return 1;
171 107
172 new_level = spell->level 108 int new_level = spell->level
173 + (caster->path_repelled & spell->path_attuned ? +2 : 0) 109 + (caster->path_repelled & spell->path_attuned ? +8 : 0)
174 + (caster->path_attuned & spell->path_attuned ? -2 : 0); 110 + (caster->path_attuned & spell->path_attuned ? -8 : 0);
175 111
176 return max (1, new_level); 112 return max (1, new_level);
177} 113}
178 114
179/* This function returns the effective level the spell 115/* This function returns the effective level the spell
185int 121int
186caster_level (object *caster, object *spell) 122caster_level (object *caster, object *spell)
187{ 123{
188 int level = caster->level; 124 int level = caster->level;
189 125
190 /* If this is a player, try to find the matching skill */ 126 /* if a rod is fired by a player, take the use_magic_item skill in consideration. */
191 if (caster->type == PLAYER && spell->skill) 127 if (caster->type == ROD && caster->env && caster->env->type == PLAYER)
128 {
129 object *skill = find_skill_by_number (caster->env, SK_USE_MAGIC_ITEM);
130 int sk_level = skill ? skill->level : 1;
131
132 level = min (level, sk_level + level / 10 + 1);
133 }
134 else if (caster->type == PLAYER && spell->skill) /* If this is a player, try to find the matching skill */
192 for (int i = 0; i < NUM_SKILLS; i++) 135 for (int i = 0; i < NUM_SKILLS; i++)
193 if (caster->contr->last_skill_ob[i] && caster->contr->last_skill_ob[i]->skill == spell->skill) 136 if (caster->contr->last_skill_ob[i] && caster->contr->last_skill_ob[i]->skill == spell->skill)
194 { 137 {
195 level = caster->contr->last_skill_ob[i]->level; 138 level = caster->contr->last_skill_ob[i]->level;
196 break; 139 break;
197 } 140 }
198 141
199 /* if a rod is fired by a player, take the use_magic_item skill in consideration. */
200 if (caster->type == ROD && caster->env && caster->env->type == PLAYER)
201 {
202 object *skill = find_skill_by_number (caster->env, SK_USE_MAGIC_ITEM);
203 int sk_level = skill ? skill->level : 1;
204
205 level = MIN (level, sk_level + level / 10 + 1);
206 }
207
208 /* Got valid caster level. Now adjust for attunement */ 142 /* Got valid caster level. Now adjust for attunement */
209 level += caster->path_repelled & spell->path_attuned ? -2 : 0; 143 level += caster->path_repelled & spell->path_attuned ? -8 : 0;
210 level += caster->path_attuned & spell->path_attuned ? +2 : 0; 144 level += caster->path_attuned & spell->path_attuned ? +8 : 0;
211 145
212 /* Always make this at least 1. If this is zero, we get divide by zero 146 /* Always make this at least 1. If this is zero, we get divide by zero
213 * errors in various places. 147 * errors in various places.
214 */ 148 */
215 return max (level, 1); 149 return max (level, 1);
259 else 193 else
260 { 194 {
261 sp = (int) (spell->stats.sp * PATH_SP_MULT (caster, spell)); 195 sp = (int) (spell->stats.sp * PATH_SP_MULT (caster, spell));
262 if (spell->stats.sp && !sp) 196 if (spell->stats.sp && !sp)
263 sp = 1; 197 sp = 1;
198
264 grace = (int) (spell->stats.grace * PATH_SP_MULT (caster, spell)); 199 grace = (int) (spell->stats.grace * PATH_SP_MULT (caster, spell));
265 if (spell->stats.grace && !grace) 200 if (spell->stats.grace && !grace)
266 grace = 1; 201 grace = 1;
267 } 202 }
203
268 if (flags == SPELL_HIGHEST) 204 if (flags == SPELL_HIGHEST)
269 return MAX (sp, grace); 205 return MAX (sp, grace);
270 else if (flags == SPELL_GRACE) 206 else if (flags == SPELL_GRACE)
271 return grace; 207 return grace;
272 else if (flags == SPELL_MANA) 208 else if (flags == SPELL_MANA)
276 LOG (llevError, "SP_level_spellpoint_cost: Unknown flags passed: %d\n", flags); 212 LOG (llevError, "SP_level_spellpoint_cost: Unknown flags passed: %d\n", flags);
277 return 0; 213 return 0;
278 } 214 }
279} 215}
280 216
281
282/* SP_level_dam_adjust: Returns adjusted damage based on the caster. 217/* SP_level_dam_adjust: Returns adjusted damage based on the caster.
283 * spob is the spell we are adjusting. 218 * spob is the spell we are adjusting.
284 */ 219 */
285int 220int
286SP_level_dam_adjust (object *caster, object *spob) 221SP_level_dam_adjust (object *caster, object *spob)
287{ 222{
223 if (!spob->dam_modifier)
224 return 0;
225
288 int level = caster_level (caster, spob); 226 int level = caster_level (caster, spob);
289 int adj = level - min_casting_level (caster, spob); 227 return max (0, level - min_casting_level (caster, spob)) / spob->dam_modifier;
290
291 if (adj < 0)
292 adj = 0;
293 if (spob->dam_modifier)
294 adj /= spob->dam_modifier;
295 else
296 adj = 0;
297 return adj;
298} 228}
299 229
300/* Adjust the strength of the spell based on level. 230/* Adjust the strength of the spell based on level.
301 * This is basically the same as SP_level_dam_adjust above, 231 * This is basically the same as SP_level_dam_adjust above,
302 * but instead looks at the level_modifier value. 232 * but instead looks at the level_modifier value.
303 */ 233 */
304int 234int
305SP_level_duration_adjust (object *caster, object *spob) 235SP_level_duration_adjust (object *caster, object *spob)
306{ 236{
237 if (!spob->duration_modifier)
238 return 0;
239
307 int level = caster_level (caster, spob); 240 int level = caster_level (caster, spob);
308 int adj = level - min_casting_level (caster, spob); 241 return max (0, level - min_casting_level (caster, spob)) / spob->duration_modifier;
309
310 if (adj < 0)
311 adj = 0;
312 if (spob->duration_modifier)
313 adj /= spob->duration_modifier;
314 else
315 adj = 0;
316
317 return adj;
318} 242}
319 243
320/* Adjust the strength of the spell based on level. 244/* Adjust the strength of the spell based on level.
321 * This is basically the same as SP_level_dam_adjust above, 245 * This is basically the same as SP_level_dam_adjust above,
322 * but instead looks at the level_modifier value. 246 * but instead looks at the level_modifier value.
323 */ 247 */
324int 248int
325SP_level_range_adjust (object *caster, object *spob) 249SP_level_range_adjust (object *caster, object *spob)
326{ 250{
251 if (!spob->range_modifier)
252 return 0;
253
327 int level = caster_level (caster, spob); 254 int level = caster_level (caster, spob);
328 int adj = level - min_casting_level (caster, spob); 255 return (level - min_casting_level (caster, spob)) / spob->range_modifier;
329
330 if (adj < 0)
331 adj = 0;
332 if (spob->range_modifier)
333 adj /= spob->range_modifier;
334 else
335 adj = 0;
336
337 return adj;
338} 256}
339 257
340/* Checks to see if player knows the spell. If the name is the same 258/* Checks to see if player knows the spell. If the name is the same
341 * as an existing spell, we presume they know it. 259 * as an existing spell, we presume they know it.
342 * returns 1 if they know the spell, 0 if they don't. 260 * returns 1 if they know the spell, 0 if they don't.
520 /* 438 /*
521 * Combine similar spell effects into one spell effect. Needed for 439 * Combine similar spell effects into one spell effect. Needed for
522 * performance reasons with meteor swarm and the like, but also for 440 * performance reasons with meteor swarm and the like, but also for
523 * playability reasons. 441 * playability reasons.
524 */ 442 */
525 if (tmp->arch == op->arch 443 if (tmp->arch == op->arch /* no harm if not comparing by name here */
526 && tmp->type == op->type 444 && tmp->type == op->type
527 && tmp->subtype == op->subtype 445 && tmp->subtype == op->subtype
528 && tmp->owner == op->owner 446 && tmp->owner == op->owner
529 && ((tmp->subtype == SP_EXPLOSION) || (tmp->subtype == SP_CONE && tmp->stats.sp == op->stats.sp))) 447 && ((tmp->subtype == SP_EXPLOSION) || (tmp->subtype == SP_CONE && tmp->stats.sp == op->stats.sp)))
530 { 448 {
774 create_treasure (head->randomitems, head, GT_INVISIBLE, op->map->difficulty, 0); 692 create_treasure (head->randomitems, head, GT_INVISIBLE, op->map->difficulty, 0);
775 693
776 insert_ob_in_map (head, op->map, op, 0); 694 insert_ob_in_map (head, op->map, op, 0);
777 695
778 /* thought it'd be cool to insert a burnout, too. */ 696 /* thought it'd be cool to insert a burnout, too. */
779 op->map->insert (get_archetype ("burnout"), op->x + freearr_x[dir], op->y + freearr_y[dir], op); 697 op->map->insert (archetype::get (shstr_burnout), op->x + freearr_x[dir], op->y + freearr_y[dir], op);
780 } 698 }
781} 699}
782 700
783/* peterm: function which summons hostile monsters and 701/* peterm: function which summons hostile monsters and
784 * places them in nearby squares. 702 * places them in nearby squares.
1086 { 1004 {
1087 skill = find_skill_by_name (op, spell_ob->skill); 1005 skill = find_skill_by_name (op, spell_ob->skill);
1088 1006
1089 if (!skill) 1007 if (!skill)
1090 { 1008 {
1091 op->failmsg (format ("You need the skill %s to cast %s!", &spell_ob->skill, &spell_ob->name)); 1009 op->failmsg (format ("You need the skill %s to cast %s! "
1010 "H<You either need to learn the skill via a skill scroll "
1011 "or you need to wear a talisman or holy symbol.>",
1012 &spell_ob->skill, &spell_ob->name));
1092 return 0; 1013 return 0;
1093 } 1014 }
1094 1015
1016 int casting_level = min_casting_level (op, spell_ob);
1017
1095 if (min_casting_level (op, spell_ob) > cast_level && !QUERY_FLAG (op, FLAG_WIZ)) 1018 if (casting_level > cast_level && !QUERY_FLAG (op, FLAG_WIZ))
1096 { 1019 {
1097 op->failmsg ("You lack enough skill to cast that spell!"); 1020 op->failmsg (format ("You lack enough skill to cast that spell! "
1021 "H<Your cast level is %d, but level %d is required. Maybe you are repelled?>",
1022 cast_level, casting_level));
1098 return 0; 1023 return 0;
1099 } 1024 }
1100 } 1025 }
1101 1026
1102 /* If the caster is the wiz, they don't ever fail, and don't have 1027 /* If the caster is the wiz, they don't ever fail, and don't have
1455 1380
1456 default: 1381 default:
1457 LOG (llevError, "cast_spell: Unhandled spell subtype %d\n", spell_ob->subtype); 1382 LOG (llevError, "cast_spell: Unhandled spell subtype %d\n", spell_ob->subtype);
1458 } 1383 }
1459 1384
1460 op->play_sound (success ? spell_ob->sound : sound_find ("fumble_spell")); 1385 op->play_sound (
1386 success
1387 ? spell_ob->sound
1388 ? spell_ob->sound
1389 : sound_find ("spell_success")
1390 : sound_find ("fumble_spell")
1391 );
1461 1392
1462 return success; 1393 return success;
1463} 1394}
1464 1395
1465/* This is called from time.c/process_object(). That function 1396/* This is called from time.c/process_object(). That function

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