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/* |
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* CrossFire, A Multiplayer game |
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* |
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* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
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* Copryight (C) 2002 Mark Wedel & Crossfire Development Team |
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* Copyright (C) 1992 Frank Tore Johansen |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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* The author can be reached via e-mail to <crossfire@schmorp.de> |
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*/ |
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|
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/* Created July 95 to separate skill utilities from actual skills -b.t. */ |
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|
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/* Reconfigured skills code to allow linking of skills to experience |
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* categories. This is done solely through the init_new_exp_system() fctn. |
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* June/July 1995 -b.t. thomas@astro.psu.edu |
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*/ |
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|
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/* July 1995 - Initial associated skills coding. Experience gains |
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* come solely from the use of skills. Overcoming an opponent (in combat, |
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* finding/disarming a trap, stealing from somebeing, etc) gains |
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* experience. Calc_skill_exp() handles the gained experience using |
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* modifications in the skills[] table. - b.t. |
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*/ |
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|
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/* define the following for skills utility debuging */ |
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|
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/* #define SKILL_UTIL_DEBUG */ |
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|
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#include <global.h> |
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#include <object.h> |
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#include <sproto.h> |
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#include <living.h> /* for defs of STR,CON,DEX,etc. -b.t. */ |
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#include <spells.h> |
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|
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const uint8_t skill_flags[NUM_SKILLS] = { |
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0, // SK_NONE |
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# define def(uc, flags) flags, |
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# include "skillinc.h" |
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# undef def |
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}; |
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|
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static int attack_hth (object *pl, int dir, const char *string, object *skill); |
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static int attack_melee_weapon (object *op, int dir, const char *string, object *skill); |
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|
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/* init_skills basically just sets up the skill_names table |
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* above. The index into the array is set up by the |
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* subtypes. |
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*/ |
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void |
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init_skills (void) |
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{ |
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for (archetype *at = first_archetype; at; at = at->next) |
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if (at->clone.type == SKILL) |
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{ |
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if (skill_names[at->clone.subtype]) |
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LOG (llevError, "init_skills: multiple skill using same subtype %d, %s, %s\n", |
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at->clone.subtype, &skill_names[at->clone.subtype], &at->clone.skill); |
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else |
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skill_names[at->clone.subtype] = at->clone.skill; |
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} |
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|
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/* This isn't really an error if there is no skill subtype set, but |
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* checking for this may catch some user errors. |
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*/ |
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for (int i = 1; i < NUM_SKILLS; i++) |
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if (!skill_names[i]) |
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LOG (llevError, "init_skills: skill subtype %d doesn't have a name?\n", i); |
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} |
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|
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/* This function goes through the player inventory and sets |
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* up the last_skills[] array in the player object. |
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* the last_skills[] is used to more quickly lookup skills - |
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* mostly used for sending exp. |
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*/ |
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void |
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link_player_skills (object *op) |
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{ |
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for (object *tmp = op->inv; tmp; tmp = tmp->below) |
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if (tmp->type == SKILL) |
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{ |
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/* This is really a warning, hence no else below */ |
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if (op->contr->last_skill_ob[tmp->subtype] && op->contr->last_skill_ob[tmp->subtype] != tmp) |
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LOG (llevError, "Multiple skills with the same subtype? %s, %s\n", |
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&op->contr->last_skill_ob[tmp->subtype]->skill, &tmp->skill); |
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|
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if (tmp->subtype >= NUM_SKILLS) |
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LOG (llevError, "Invalid subtype number %d (range 0-%d)\n", tmp->subtype, NUM_SKILLS); |
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else |
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{ |
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op->contr->last_skill_ob[tmp->subtype] = tmp; |
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op->contr->ns->last_skill_exp[tmp->subtype] = -1; //TODO: this should go |
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} |
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} |
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} |
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|
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/* This returns the skill pointer of the given name (the |
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* one that accumlates exp, has the level, etc). |
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* |
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* It is presumed that the player will be needing to actually |
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* use the skill, so thus if use of the skill requires a skill |
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* tool, this code will equip it. |
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*/ |
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object * |
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find_skill_by_name (object *who, const char *name) |
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{ |
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if (!name) |
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return 0; |
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|
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object *skill = 0, *skill_tool = 0; |
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|
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/* We make sure the length of the string in the object is greater |
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* in length than the passed string. Eg, if we have a skill called |
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* 'hi', we don't want to match if the user passed 'high' |
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*/ |
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for (object *tmp = who->inv; tmp; tmp = tmp->below) |
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{ |
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if (tmp->type == SKILL && !strncasecmp (name, tmp->skill, strlen (name)) && strlen (tmp->skill) >= strlen (name)) |
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skill = tmp; |
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|
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/* Try to find appropriate skilltool. If the player has one already |
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* applied, we try to keep using that one. |
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*/ |
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else if (tmp->type == SKILL_TOOL && !strncasecmp (name, tmp->skill, strlen (name)) && strlen (tmp->skill) >= strlen (name)) |
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{ |
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if (QUERY_FLAG (tmp, FLAG_APPLIED)) |
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skill_tool = tmp; |
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else if (!skill_tool || !QUERY_FLAG (skill_tool, FLAG_APPLIED)) |
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skill_tool = tmp; |
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} |
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} |
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|
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/* If this is a skill that can be used without a tool, return it */ |
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if (skill && QUERY_FLAG (skill, FLAG_CAN_USE_SKILL)) |
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return skill; |
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|
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/* Player has a tool to use the skill. If not applied, apply it - |
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* if not successful, return null. If they do have the skill tool |
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* but not the skill itself, give it to them. |
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*/ |
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if (skill_tool) |
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{ |
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if (!QUERY_FLAG (skill_tool, FLAG_APPLIED)) |
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if (apply_special (who, skill_tool, 0)) |
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return 0; |
159 |
|
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if (!skill) |
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{ |
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skill = give_skill_by_name (who, skill_tool->skill); |
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link_player_skills (who); |
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} |
165 |
|
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return skill; |
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} |
168 |
|
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return 0; |
170 |
} |
171 |
|
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/* This returns the skill pointer of the given name (the |
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* one that accumlates exp, has the level, etc). |
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* |
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* It is presumed that the player will be needing to actually |
176 |
* use the skill, so thus if use of the skill requires a skill |
177 |
* tool, this code will equip it. |
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* |
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* This code is basically the same as find_skill_by_name() above, |
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* but instead a skill name, we search by matching number. |
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* this replaces find_skill. |
182 |
*/ |
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object * |
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find_skill_by_number (object *who, int skillno) |
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{ |
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object *skill = NULL, *skill_tool = NULL, *tmp; |
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|
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if (skillno < 1 || skillno >= NUM_SKILLS) |
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return NULL; |
190 |
|
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for (tmp = who->inv; tmp != NULL; tmp = tmp->below) |
192 |
{ |
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if (tmp->type == SKILL && tmp->subtype == skillno) |
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skill = tmp; |
195 |
|
196 |
/* Try to find appropriate skilltool. If the player has one already |
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* applied, we try to keep using that one. |
198 |
*/ |
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else if (tmp->type == SKILL_TOOL && tmp->subtype == skillno) |
200 |
{ |
201 |
if (QUERY_FLAG (tmp, FLAG_APPLIED)) |
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skill_tool = tmp; |
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else if (!skill_tool || !QUERY_FLAG (skill_tool, FLAG_APPLIED)) |
204 |
skill_tool = tmp; |
205 |
} |
206 |
} |
207 |
/* If this is a skill that can be used without a tool, return it */ |
208 |
if (skill && QUERY_FLAG (skill, FLAG_CAN_USE_SKILL)) |
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return skill; |
210 |
|
211 |
/* Player has a tool to use the skill. IF not applied, apply it - |
212 |
* if not successful, return null. If they do have the skill tool |
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* but not the skill itself, give it to them. |
214 |
*/ |
215 |
if (skill_tool) |
216 |
{ |
217 |
if (!QUERY_FLAG (skill_tool, FLAG_APPLIED)) |
218 |
{ |
219 |
if (apply_special (who, skill_tool, 0)) |
220 |
return NULL; |
221 |
} |
222 |
|
223 |
if (!skill) |
224 |
{ |
225 |
skill = give_skill_by_name (who, skill_tool->skill); |
226 |
link_player_skills (who); |
227 |
} |
228 |
|
229 |
return skill; |
230 |
} |
231 |
|
232 |
return NULL; |
233 |
} |
234 |
|
235 |
/* This changes the objects skill to new_skill. |
236 |
* note that this function doesn't always need to get used - |
237 |
* you can now add skill exp to the player without the chosen_skill being |
238 |
* set. This function is of most interest to players to update |
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* the various range information. |
240 |
* return 1 on success, 0 on error |
241 |
*/ |
242 |
int |
243 |
change_skill (object *who, object *new_skill, int flag) |
244 |
{ |
245 |
if (who->type != PLAYER) |
246 |
return 0; |
247 |
|
248 |
// optimise this supposedly common case |
249 |
if (new_skill == who->chosen_skill) |
250 |
return 1; |
251 |
|
252 |
if (who->chosen_skill) |
253 |
{ |
254 |
apply_special (who, who->chosen_skill, AP_UNAPPLY); |
255 |
who->chosen_skill = 0;//D verify wether necessary |
256 |
} |
257 |
|
258 |
if (!new_skill) |
259 |
{ |
260 |
LOG (llevError | logBacktrace, "change_skill called on %s with NULL skill\n", |
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who->debug_desc ()); |
262 |
return 0; |
263 |
} |
264 |
|
265 |
new_skill->inv_splay (); |
266 |
|
267 |
if (apply_special (who, new_skill, AP_APPLY)) |
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return 0; |
269 |
|
270 |
return 1; |
271 |
} |
272 |
|
273 |
/* This function just clears the chosen_skill and range_skill values |
274 |
* in the player. |
275 |
*/ |
276 |
void |
277 |
clear_skill (object *who) |
278 |
{ |
279 |
who->chosen_skill = 0; |
280 |
CLEAR_FLAG (who, FLAG_READY_SKILL); |
281 |
|
282 |
if (who->type == PLAYER) |
283 |
if (who->contr->ranged_ob && who->contr->ranged_ob->type == SKILL) |
284 |
who->contr->ranged_ob = 0; |
285 |
} |
286 |
|
287 |
/* do_skill() - Main skills use function-similar in scope to cast_spell(). |
288 |
* We handle all requests for skill use outside of some combat here. |
289 |
* We require a separate routine outside of fire() so as to allow monsters |
290 |
* to utilize skills. Returns 1 on use of skill, otherwise 0. |
291 |
* This is changed (2002-11-30) from the old method that returned |
292 |
* exp - no caller needed that info, but it also prevented the callers |
293 |
* from know if a skill was actually used, as many skills don't |
294 |
* give any exp for their direct use (eg, throwing). |
295 |
* It returns 0 if no skill was used. |
296 |
*/ |
297 |
int |
298 |
do_skill (object *op, object *part, object *skill, int dir, const char *string) |
299 |
{ |
300 |
int success = 0, exp = 0; |
301 |
int did_alc = 0; |
302 |
|
303 |
if (!skill) |
304 |
return 0; |
305 |
|
306 |
/* The code below presumes that the skill points to the object that |
307 |
* holds the exp, level, etc of the skill. So if this is a player |
308 |
* go and try to find the actual real skill pointer, and if the |
309 |
* the player doesn't have a bucket for that, create one. |
310 |
*/ |
311 |
if (skill->type != SKILL && op->type == PLAYER) |
312 |
{ |
313 |
for (object *tmp = op->inv; tmp; tmp = tmp->below) |
314 |
if (tmp->type == SKILL && tmp->skill == skill->skill) |
315 |
{ |
316 |
skill = tmp; |
317 |
goto found; |
318 |
} |
319 |
|
320 |
skill = give_skill_by_name (op, skill->skill); |
321 |
found: ; |
322 |
} |
323 |
|
324 |
// skill, by_whom, on_which_object, which direction, skill_argument |
325 |
if (INVOKE_OBJECT (USE_SKILL, skill, ARG_OBJECT (op), ARG_OBJECT (part), ARG_INT (dir), ARG_STRING (string))) |
326 |
return 0; |
327 |
|
328 |
switch (skill->subtype) |
329 |
{ |
330 |
case SK_LEVITATION: |
331 |
/* Not 100% sure if this will work with new movement code - |
332 |
* the levitation skill has move_type for flying, so when |
333 |
* equipped, that should transfer to player, when not, |
334 |
* shouldn't. |
335 |
*/ |
336 |
if (QUERY_FLAG (skill, FLAG_APPLIED)) |
337 |
{ |
338 |
CLEAR_FLAG (skill, FLAG_APPLIED); |
339 |
new_draw_info (NDI_UNIQUE, 0, op, "You come to earth."); |
340 |
} |
341 |
else |
342 |
{ |
343 |
SET_FLAG (skill, FLAG_APPLIED); |
344 |
new_draw_info (NDI_UNIQUE, 0, op, "You rise into the air!."); |
345 |
} |
346 |
|
347 |
op->update_stats (); |
348 |
success = 1; |
349 |
break; |
350 |
|
351 |
case SK_STEALING: |
352 |
exp = success = steal (op, dir, skill); |
353 |
break; |
354 |
|
355 |
case SK_LOCKPICKING: |
356 |
exp = success = pick_lock (op, dir, skill); |
357 |
break; |
358 |
|
359 |
case SK_HIDING: |
360 |
exp = success = hide (op, skill); |
361 |
break; |
362 |
|
363 |
case SK_JUMPING: |
364 |
success = jump (op, dir, skill); |
365 |
break; |
366 |
|
367 |
case SK_INSCRIPTION: |
368 |
exp = success = write_on_item (op, string, skill); |
369 |
break; |
370 |
|
371 |
case SK_MEDITATION: |
372 |
meditate (op, skill); |
373 |
success = 1; |
374 |
break; |
375 |
/* note that the following 'attack' skills gain exp through hit_player() */ |
376 |
|
377 |
case SK_KARATE: |
378 |
attack_hth (op, dir, "karate-chopped", skill); |
379 |
break; |
380 |
|
381 |
case SK_PUNCHING: |
382 |
attack_hth (op, dir, "punched", skill); |
383 |
break; |
384 |
|
385 |
case SK_FLAME_TOUCH: |
386 |
attack_hth (op, dir, "flamed", skill); |
387 |
break; |
388 |
|
389 |
case SK_SPARK_TOUCH: |
390 |
attack_hth (op, dir, "zapped", skill); |
391 |
break; |
392 |
|
393 |
case SK_SHIVER: |
394 |
attack_hth (op, dir, "froze", skill); |
395 |
break; |
396 |
|
397 |
case SK_ACID_SPLASH: |
398 |
attack_hth (op, dir, "dissolved", skill); |
399 |
break; |
400 |
|
401 |
case SK_POISON_NAIL: |
402 |
attack_hth (op, dir, "injected poison into", skill); |
403 |
break; |
404 |
|
405 |
case SK_CLAWING: |
406 |
attack_hth (op, dir, "clawed", skill); |
407 |
break; |
408 |
|
409 |
case SK_ONE_HANDED_WEAPON: |
410 |
case SK_TWO_HANDED_WEAPON: |
411 |
attack_melee_weapon (op, dir, NULL, skill); |
412 |
break; |
413 |
|
414 |
case SK_FIND_TRAPS: |
415 |
exp = success = find_traps (op, skill); |
416 |
break; |
417 |
|
418 |
case SK_SINGING: |
419 |
exp = success = singing (op, dir, skill); |
420 |
break; |
421 |
|
422 |
case SK_ORATORY: |
423 |
exp = success = use_oratory (op, dir, skill); |
424 |
break; |
425 |
|
426 |
case SK_SMITHERY: |
427 |
case SK_BOWYER: |
428 |
case SK_JEWELER: |
429 |
case SK_ALCHEMY: |
430 |
case SK_THAUMATURGY: |
431 |
case SK_LITERACY: |
432 |
case SK_WOODSMAN: |
433 |
/* first, we try to find a cauldron, and do the alchemy thing. |
434 |
* failing that, we go and identify stuff. |
435 |
*/ |
436 |
for (object *next, *tmp = GET_MAP_OB (op->map, op->x, op->y); tmp; tmp = next) |
437 |
{ |
438 |
next = tmp->above; |
439 |
|
440 |
if (QUERY_FLAG (tmp, FLAG_IS_CAULDRON)) |
441 |
{ |
442 |
attempt_do_alchemy (op, tmp); |
443 |
|
444 |
if (QUERY_FLAG (tmp, FLAG_APPLIED)) |
445 |
esrv_send_inventory (op, tmp); |
446 |
|
447 |
did_alc = 1; |
448 |
} |
449 |
} |
450 |
|
451 |
if (did_alc == 0) |
452 |
exp = success = skill_ident (op, skill); |
453 |
|
454 |
break; |
455 |
|
456 |
case SK_DET_MAGIC: |
457 |
case SK_DET_CURSE: |
458 |
exp = success = skill_ident (op, skill); |
459 |
break; |
460 |
|
461 |
case SK_DISARM_TRAPS: |
462 |
exp = success = remove_trap (op, dir, skill); |
463 |
break; |
464 |
|
465 |
case SK_THROWING: |
466 |
success = skill_throw (op, part, dir, string, skill); |
467 |
break; |
468 |
|
469 |
case SK_SET_TRAP: |
470 |
new_draw_info (NDI_UNIQUE, 0, op, "This skill is not currently implemented."); |
471 |
break; |
472 |
|
473 |
case SK_USE_MAGIC_ITEM: |
474 |
case SK_MISSILE_WEAPON: |
475 |
new_draw_info (NDI_UNIQUE, 0, op, "There is no special attack for this skill."); |
476 |
break; |
477 |
|
478 |
case SK_PRAYING: |
479 |
success = pray (op, skill); |
480 |
break; |
481 |
|
482 |
case SK_BARGAINING: |
483 |
success = describe_shop (op); |
484 |
break; |
485 |
|
486 |
case SK_SORCERY: |
487 |
case SK_EVOCATION: |
488 |
case SK_PYROMANCY: |
489 |
case SK_SUMMONING: |
490 |
case SK_CLIMBING: |
491 |
new_draw_info (NDI_UNIQUE, 0, op, "This skill is already in effect."); |
492 |
break; |
493 |
|
494 |
default: |
495 |
LOG (llevDebug, "%s attempted to use unknown skill: %d\n", query_name (op), op->chosen_skill->stats.sp); |
496 |
break; |
497 |
} |
498 |
|
499 |
/* For players we now update the speed_left from using the skill. |
500 |
* Monsters have no skill use time because of the random nature in |
501 |
* which use_monster_skill is called already simulates this. |
502 |
* If certain skills should take more/less time, that should be |
503 |
* in the code for the skill itself. |
504 |
*/ |
505 |
|
506 |
if (op->type == PLAYER) |
507 |
op->speed_left -= 1.f; |
508 |
|
509 |
/* this is a good place to add experience for successfull use of skills. |
510 |
* Note that add_exp() will figure out player/monster experience |
511 |
* gain problems. |
512 |
*/ |
513 |
|
514 |
if (success && exp) |
515 |
change_exp (op, exp, skill->skill, 0); |
516 |
|
517 |
return success; |
518 |
} |
519 |
|
520 |
/* calc_skill_exp() - calculates amount of experience can be gained for |
521 |
* successfull use of a skill. Returns value of experience gain. |
522 |
* Here we take the view that a player must 'overcome an opponent' |
523 |
* in order to gain experience. Examples include foes killed combat, |
524 |
* finding/disarming a trap, stealing from somebeing, etc. |
525 |
* The gained experience is based primarily on the difference in levels, |
526 |
* exp point value of vanquished foe, the relevent stats of the skill being |
527 |
* used and modifications in the skills[] table. |
528 |
* |
529 |
* For now, monsters and players will be treated differently. Below I give |
530 |
* the algorithm for *PLAYER* experience gain. Monster exp gain is simpler. |
531 |
* Monsters just get 10% of the exp of the opponent. |
532 |
* |
533 |
* players get a ratio, eg, opponent lvl / player level. This is then |
534 |
* multiplied by various things. If simple exp is true, then |
535 |
* this multiplier, include the level difference, is always 1. |
536 |
* This revised method prevents some cases where there are big gaps |
537 |
* in the amount you get just because you are now equal level vs lower |
538 |
* level |
539 |
* who is player/creature that used the skill. |
540 |
* op is the object that was 'defeated'. |
541 |
* skill is the skill used. If no skill is used, it should just |
542 |
* point back to who. |
543 |
* |
544 |
*/ |
545 |
int |
546 |
calc_skill_exp (object *who, object *op, object *skill) |
547 |
{ |
548 |
int op_exp = 0, op_lvl = 0; |
549 |
float base, value, lvl_mult = 0.0; |
550 |
|
551 |
if (!skill) |
552 |
skill = who; |
553 |
|
554 |
/* Oct 95 - where we have an object, I expanded our treatment |
555 |
* to 3 cases: |
556 |
* non-living magic obj, runes and everything else. |
557 |
* |
558 |
* If an object is not alive and magical we set the base exp higher to |
559 |
* help out exp awards for skill_ident skills. Also, if |
560 |
* an item is type RUNE, we give out exp based on stats.Cha |
561 |
* and level (this was the old system) -b.t. |
562 |
*/ |
563 |
|
564 |
if (!op) |
565 |
{ /* no item/creature */ |
566 |
op_lvl = who->map->difficulty < 1 ? 1 : who->map->difficulty; |
567 |
op_exp = 0; |
568 |
} |
569 |
else if (op->type == RUNE || op->type == TRAP) |
570 |
{ /* all traps. If stats.Cha > 1 we use that |
571 |
* for the amount of experience */ |
572 |
op_exp = op->stats.Cha > 1 ? op->stats.Cha : op->stats.exp; |
573 |
op_lvl = op->level; |
574 |
} |
575 |
else |
576 |
{ /* all other items/living creatures */ |
577 |
op_exp = op->stats.exp; |
578 |
op_lvl = op->level; |
579 |
if (!QUERY_FLAG (op, FLAG_ALIVE)) |
580 |
{ /* for ident/make items */ |
581 |
op_lvl += 5 * abs (op->magic); |
582 |
} |
583 |
} |
584 |
|
585 |
if (op_lvl < 1) |
586 |
op_lvl = 1; |
587 |
|
588 |
if (who->type != PLAYER) |
589 |
{ /* for monsters only */ |
590 |
return ((int) (op_exp * 0.1) + 1); /* we add one to insure positive value is returned */ |
591 |
} |
592 |
else |
593 |
{ /* for players */ |
594 |
base = op_exp; |
595 |
/* if skill really is a skill, then we can look at the skill archetype for |
596 |
* bse reward value (exp) and level multiplier factor. |
597 |
*/ |
598 |
if (skill->type == SKILL) |
599 |
{ |
600 |
base += skill->arch->clone.stats.exp; |
601 |
if (settings.simple_exp) |
602 |
{ |
603 |
if (skill->arch->clone.level) |
604 |
lvl_mult = (float) skill->arch->clone.level / 100.0; |
605 |
else |
606 |
lvl_mult = 1.0; /* no adjustment */ |
607 |
} |
608 |
else |
609 |
{ |
610 |
if (skill->level) |
611 |
lvl_mult = ((float) skill->arch->clone.level * (float) op_lvl) / ((float) skill->level * 100.0); |
612 |
else |
613 |
lvl_mult = 1.0; |
614 |
} |
615 |
} |
616 |
else |
617 |
{ |
618 |
/* Don't divide by zero here! */ |
619 |
lvl_mult = (float) op_lvl / (float) (skill->level ? skill->level : 1); |
620 |
} |
621 |
} |
622 |
|
623 |
/* assemble the exp total, and return value */ |
624 |
|
625 |
value = base * lvl_mult; |
626 |
if (value < 1) |
627 |
value = 1; /* Always give at least 1 exp point */ |
628 |
|
629 |
#ifdef SKILL_UTIL_DEBUG |
630 |
LOG (llevDebug, "calc_skill_exp(): who: %s(lvl:%d) op:%s(lvl:%d)\n", who->name, skill->level, op->name, op_lvl); |
631 |
#endif |
632 |
return ((int) value); |
633 |
} |
634 |
|
635 |
/* Learn skill. This inserts the requested skill in the player's |
636 |
* inventory. The skill field of the scroll should have the |
637 |
* exact name of the requested skill. |
638 |
* This one actually teaches the player the skill as something |
639 |
* they can equip. |
640 |
* Return 0 if the player knows the skill, 1 if the |
641 |
* player learns the skill, 2 otherwise. |
642 |
*/ |
643 |
int |
644 |
learn_skill (object *pl, object *scroll) |
645 |
{ |
646 |
object *tmp; |
647 |
|
648 |
if (!scroll->skill) |
649 |
{ |
650 |
LOG (llevError, "skill scroll %s does not have skill pointer set.\n", &scroll->name); |
651 |
return 2; |
652 |
} |
653 |
|
654 |
/* can't use find_skill_by_name because we want skills the player knows |
655 |
* but can't use natively. |
656 |
*/ |
657 |
|
658 |
for (tmp = pl->inv; tmp != NULL; tmp = tmp->below) |
659 |
if (tmp->type == SKILL && !strncasecmp (scroll->skill, tmp->skill, strlen (scroll->skill))) |
660 |
break; |
661 |
|
662 |
/* player already knows it */ |
663 |
if (tmp && QUERY_FLAG (tmp, FLAG_CAN_USE_SKILL)) |
664 |
return 0; |
665 |
|
666 |
/* now a random change to learn, based on player Int. |
667 |
* give bonus based on level - otherwise stupid characters |
668 |
* might never be able to learn anything. |
669 |
*/ |
670 |
if (random_roll (0, 99, pl, PREFER_LOW) > (learn_spell[pl->stats.Int] + (pl->level / 5))) |
671 |
return 2; /* failure :< */ |
672 |
|
673 |
if (!tmp) |
674 |
tmp = give_skill_by_name (pl, scroll->skill); |
675 |
|
676 |
if (!tmp) |
677 |
{ |
678 |
LOG (llevError, "skill scroll %s does not have valid skill name (%s).\n", &scroll->name, &scroll->skill); |
679 |
return 2; |
680 |
} |
681 |
|
682 |
SET_FLAG (tmp, FLAG_CAN_USE_SKILL); |
683 |
link_player_skills (pl); |
684 |
return 1; |
685 |
} |
686 |
|
687 |
/* Gives a percentage clipped to 0% -> 100% of a/b. */ |
688 |
/* Probably belongs in some global utils-type file? */ |
689 |
static int |
690 |
clipped_percent (sint64 a, sint64 b) |
691 |
{ |
692 |
int rv; |
693 |
|
694 |
if (b <= 0) |
695 |
return 0; |
696 |
|
697 |
rv = (int) ((100.0f * ((float) a) / ((float) b)) + 0.5f); |
698 |
|
699 |
if (rv < 0) |
700 |
return 0; |
701 |
else if (rv > 100) |
702 |
return 100; |
703 |
|
704 |
return rv; |
705 |
} |
706 |
|
707 |
/* show_skills() - Meant to allow players to examine |
708 |
* their current skill list. |
709 |
* This shows the amount of exp they have in the skills. |
710 |
* we also include some other non skill related info (god, |
711 |
* max weapon improvments, item power). |
712 |
* Note this function is a bit more complicated becauase we |
713 |
* we want ot sort the skills before printing them. If we |
714 |
* just dumped this as we found it, this would be a bit |
715 |
* simpler. |
716 |
*/ |
717 |
|
718 |
void |
719 |
show_skills (object *op, const char *search) |
720 |
{ |
721 |
object *tmp = NULL; |
722 |
char buf[MAX_BUF]; |
723 |
const char *cp; |
724 |
int i, num_skills_found = 0; |
725 |
static const char *const periods = "........................................"; |
726 |
|
727 |
/* Need to have a pointer and use strdup for qsort to work properly */ |
728 |
char skills[NUM_SKILLS][MAX_BUF]; |
729 |
|
730 |
|
731 |
for (tmp = op->inv; tmp != NULL; tmp = tmp->below) |
732 |
{ |
733 |
if (tmp->type == SKILL) |
734 |
{ |
735 |
if (search && strstr (tmp->name, search) == NULL) |
736 |
continue; |
737 |
/* Basically want to fill this out to 40 spaces with periods */ |
738 |
sprintf (buf, "%s%s", &tmp->name, periods); |
739 |
buf[40] = 0; |
740 |
|
741 |
if (settings.permanent_exp_ratio) |
742 |
{ |
743 |
sprintf (skills[num_skills_found++], "%slvl:%3d (xp:%" PRId64 "/%" PRId64 "/%d%%)", |
744 |
buf, tmp->level, tmp->stats.exp, |
745 |
level_exp (tmp->level + 1, op->expmul), clipped_percent (tmp->perm_exp, tmp->stats.exp)); |
746 |
} |
747 |
else |
748 |
{ |
749 |
sprintf (skills[num_skills_found++], "%slvl:%3d (xp:%" PRId64 "/%" PRId64 ")", |
750 |
buf, tmp->level, tmp->stats.exp, level_exp (tmp->level + 1, op->expmul)); |
751 |
} |
752 |
/* I don't know why some characters get a bunch of skills, but |
753 |
* it sometimes happens (maybe a leftover from bugier earlier code |
754 |
* and those character are still about). In any case, lets handle |
755 |
* it so it doesn't crash the server - otherwise, one character may |
756 |
* crash the server numerous times. |
757 |
*/ |
758 |
if (num_skills_found >= NUM_SKILLS) |
759 |
{ |
760 |
new_draw_info (NDI_RED, 0, op, "Your character has too many skills."); |
761 |
new_draw_info (NDI_RED, 0, op, "Something isn't right - contact the server admin"); |
762 |
break; |
763 |
} |
764 |
} |
765 |
} |
766 |
|
767 |
clear_win_info (op); |
768 |
new_draw_info (NDI_UNIQUE, 0, op, "Player skills:"); |
769 |
if (num_skills_found > 1) |
770 |
qsort (skills, num_skills_found, MAX_BUF, (int (*)(const void *, const void *)) std::strcmp); |
771 |
|
772 |
for (i = 0; i < num_skills_found; i++) |
773 |
new_draw_info (NDI_UNIQUE, 0, op, skills[i]); |
774 |
|
775 |
new_draw_info_format (NDI_UNIQUE, 0, op, "You can handle %d weapon improvements.", op->level / 5 + 5); |
776 |
|
777 |
cp = determine_god (op); |
778 |
new_draw_info_format (NDI_UNIQUE, 0, op, "You worship %s.", cp ? cp : "no god at current time"); |
779 |
|
780 |
new_draw_info_format (NDI_UNIQUE, 0, op, "Your equipped item power is %d out of %d\n", |
781 |
op->contr->item_power, (int) (op->level * settings.item_power_factor)); |
782 |
} |
783 |
|
784 |
/* use_skill() - similar to invoke command, it executes the skill in the |
785 |
* direction that the user is facing. Returns false if we are unable to |
786 |
* change to the requested skill, or were unable to use the skill properly. |
787 |
* This is tricky because skills can have spaces. We basically roll |
788 |
* our own find_skill_by_name so we can try to do better string matching. |
789 |
*/ |
790 |
int |
791 |
use_skill (object *op, const char *string) |
792 |
{ |
793 |
object *skop; |
794 |
size_t len; |
795 |
|
796 |
if (!string) |
797 |
return 0; |
798 |
|
799 |
for (skop = op->inv; skop != NULL; skop = skop->below) |
800 |
{ |
801 |
if (skop->type == SKILL && QUERY_FLAG (skop, FLAG_CAN_USE_SKILL) && |
802 |
!strncasecmp (string, skop->skill, MIN (strlen (string), (size_t) strlen (skop->skill)))) |
803 |
break; |
804 |
else if (skop->type == SKILL_TOOL && !strncasecmp (string, skop->skill, MIN (strlen (string), (size_t) strlen (skop->skill)))) |
805 |
break; |
806 |
} |
807 |
if (!skop) |
808 |
{ |
809 |
new_draw_info_format (NDI_UNIQUE, 0, op, "Unable to find skill %s", string); |
810 |
return 0; |
811 |
} |
812 |
|
813 |
len = strlen (skop->skill); |
814 |
|
815 |
/* All this logic goes and skips over the skill name to find any |
816 |
* options given to the skill. Its pretty simple - if there |
817 |
* are extra parameters (as deteremined by string length), we |
818 |
* want to skip over any leading spaces. |
819 |
*/ |
820 |
if (len >= strlen (string)) |
821 |
{ |
822 |
string = NULL; |
823 |
} |
824 |
else |
825 |
{ |
826 |
string += len; |
827 |
while (*string == 0x20) |
828 |
string++; |
829 |
if (strlen (string) == 0) |
830 |
string = NULL; |
831 |
} |
832 |
|
833 |
#ifdef SKILL_UTIL_DEBUG |
834 |
LOG (llevDebug, "use_skill() got skill: %s\n", sknum > -1 ? skills[sknum].name : "none"); |
835 |
#endif |
836 |
|
837 |
/* Change to the new skill, then execute it. */ |
838 |
if (do_skill (op, op, skop, op->facing, string)) |
839 |
return 1; |
840 |
|
841 |
return 0; |
842 |
} |
843 |
|
844 |
static bool |
845 |
hth_skill_p (object *skill) |
846 |
{ |
847 |
return (skill_flags [skill->subtype] & (SF_COMBAT | SF_NEED_WEAPON)) == SF_COMBAT; |
848 |
} |
849 |
|
850 |
/* This finds the first unarmed skill the player has, and returns it. |
851 |
*/ |
852 |
static object * |
853 |
find_player_hth_skill (object *op) |
854 |
{ |
855 |
for (object *tmp = op->inv; tmp; tmp = tmp->below) |
856 |
if (tmp->type == SKILL && QUERY_FLAG (tmp, FLAG_CAN_USE_SKILL) && hth_skill_p (tmp)) |
857 |
return tmp; |
858 |
|
859 |
return 0; |
860 |
} |
861 |
|
862 |
/* do_skill_attack() - We have got an appropriate opponent from either |
863 |
* move_player_attack() or skill_attack(). In this part we get on with |
864 |
* attacking, take care of messages from the attack and changes in invisible. |
865 |
* Returns true if the attack damaged the opponent. |
866 |
* tmp is the targetted monster. |
867 |
* op is what is attacking |
868 |
* string is passed along to describe what messages to describe |
869 |
* the damage. |
870 |
*/ |
871 |
static int |
872 |
do_skill_attack (object *tmp, object *op, const char *string, object *skill) |
873 |
{ |
874 |
if (INVOKE_OBJECT (SKILL_ATTACK, op, ARG_OBJECT (tmp), ARG_STRING (string), ARG_OBJECT (skill))) |
875 |
return RESULT_INT (0); |
876 |
|
877 |
/* For Players only: if there is no ready weapon, and no "attack" skill |
878 |
* is readied either then try to find a skill for the player to use. |
879 |
* it is presumed that if skill is set, it is a valid attack skill (eg, |
880 |
* the caller should have set it appropriately). We still want to pass |
881 |
* through that code if skill is set to change to the skill. |
882 |
*/ |
883 |
if (player *pl = op->contr) |
884 |
{ |
885 |
if (!pl->combat_ob) |
886 |
{ |
887 |
if (QUERY_FLAG (op, FLAG_READY_WEAPON)) |
888 |
{ |
889 |
for (tmp = op->inv; tmp; tmp = tmp->below) |
890 |
if (tmp->type == WEAPON && QUERY_FLAG (tmp, FLAG_APPLIED)) |
891 |
break; |
892 |
|
893 |
if (!tmp) |
894 |
{ |
895 |
LOG (llevError, "Could not find applied weapon on %s\n", &op->name); |
896 |
return 0; |
897 |
} |
898 |
|
899 |
change_skill (op, find_skill_by_name (op, tmp->skill), 1); |
900 |
} |
901 |
else |
902 |
{ |
903 |
if (!skill) |
904 |
{ |
905 |
/* See if the players chosen skill is a combat skill, and use |
906 |
* it if appropriate. |
907 |
*/ |
908 |
if (op->chosen_skill && hth_skill_p (op->chosen_skill)) |
909 |
skill = op->chosen_skill; |
910 |
else |
911 |
{ |
912 |
skill = find_player_hth_skill (op); |
913 |
|
914 |
if (!skill) |
915 |
{ |
916 |
new_draw_info (NDI_BLACK, 0, op, "You have no unarmed combat skills!"); |
917 |
return 0; |
918 |
} |
919 |
} |
920 |
} |
921 |
|
922 |
/* now try to ready the new skill */ |
923 |
if (!change_skill (op, skill, 0)) |
924 |
{ /* oh oh, trouble! */ |
925 |
new_draw_info_format (NDI_UNIQUE, 0, op, "Couldn't change to skill %s", &skill->name); |
926 |
return 0; |
927 |
} |
928 |
} |
929 |
|
930 |
if (!pl->combat_ob) |
931 |
{ |
932 |
LOG (llevError, "Could not find anything to attack on %s\n", &op->name); |
933 |
return 0; |
934 |
} |
935 |
} |
936 |
|
937 |
if (!op->change_weapon (pl->combat_ob)) |
938 |
return 0; |
939 |
|
940 |
/* lose invisiblity/hiding status for running attacks */ |
941 |
if (pl->tmp_invis) |
942 |
{ |
943 |
pl->tmp_invis = 0; |
944 |
op->invisible = 0; |
945 |
op->hide = 0; |
946 |
update_object (op, UP_OBJ_CHANGE); |
947 |
} |
948 |
} |
949 |
|
950 |
int success = attack_ob (tmp, op); |
951 |
|
952 |
/* print appropriate messages to the player */ |
953 |
|
954 |
if (success && string && tmp && !QUERY_FLAG (tmp, FLAG_FREED)) |
955 |
{ |
956 |
if (op->type == PLAYER) |
957 |
new_draw_info_format (NDI_UNIQUE, 0, op, "You %s %s!", string, query_name (tmp)); |
958 |
else if (tmp->type == PLAYER) |
959 |
new_draw_info_format (NDI_UNIQUE, 0, tmp, "%s %s you!", query_name (op), string); |
960 |
} |
961 |
|
962 |
return success; |
963 |
} |
964 |
|
965 |
/* skill_attack() - Core routine for use when we attack using a skills |
966 |
* system. In essence, this code handles |
967 |
* all skill-based attacks, ie hth, missile and melee weapons should be |
968 |
* treated here. If an opponent is already supplied by move_player(), |
969 |
* we move right onto do_skill_attack(), otherwise we find if an |
970 |
* appropriate opponent exists. |
971 |
* |
972 |
* This is called by move_player() and attack_hth() |
973 |
* |
974 |
* Initial implementation by -bt thomas@astro.psu.edu |
975 |
*/ |
976 |
int |
977 |
skill_attack (object *tmp, object *pl, int dir, const char *string, object *skill) |
978 |
{ |
979 |
sint16 tx, ty; |
980 |
maptile *m; |
981 |
int mflags; |
982 |
|
983 |
if (!dir) |
984 |
dir = pl->facing; |
985 |
|
986 |
tx = freearr_x[dir]; |
987 |
ty = freearr_y[dir]; |
988 |
|
989 |
/* If we don't yet have an opponent, find if one exists, and attack. |
990 |
* Legal opponents are the same as outlined in move_player_attack() |
991 |
*/ |
992 |
if (!tmp) |
993 |
{ |
994 |
m = pl->map; |
995 |
tx = pl->x + freearr_x[dir]; |
996 |
ty = pl->y + freearr_y[dir]; |
997 |
|
998 |
mflags = get_map_flags (m, &m, tx, ty, &tx, &ty); |
999 |
if (mflags & P_OUT_OF_MAP) |
1000 |
return 0; |
1001 |
|
1002 |
/* space must be blocked for there to be anything interesting to do */ |
1003 |
if (!OB_TYPE_MOVE_BLOCK (pl, GET_MAP_MOVE_BLOCK (m, tx, ty))) |
1004 |
return 0; |
1005 |
|
1006 |
for (tmp = GET_MAP_OB (m, tx, ty); tmp; tmp = tmp->above) |
1007 |
if ((QUERY_FLAG (tmp, FLAG_ALIVE) && tmp->stats.hp >= 0) || QUERY_FLAG (tmp, FLAG_CAN_ROLL) || tmp->type == LOCKED_DOOR) |
1008 |
{ |
1009 |
/* Don't attack party members */ |
1010 |
if ((pl->type == PLAYER && tmp->type == PLAYER) && (pl->contr->party != NULL && pl->contr->party == tmp->contr->party)) |
1011 |
return 0; |
1012 |
|
1013 |
break; |
1014 |
} |
1015 |
} |
1016 |
|
1017 |
if (!tmp) |
1018 |
{ |
1019 |
if (pl->type == PLAYER) |
1020 |
new_draw_info (NDI_UNIQUE, 0, pl, "There is nothing to attack!"); |
1021 |
|
1022 |
return 0; |
1023 |
} |
1024 |
|
1025 |
return do_skill_attack (tmp, pl, string, skill); |
1026 |
} |
1027 |
|
1028 |
/* attack_hth() - this handles all hand-to-hand attacks -b.t. */ |
1029 |
|
1030 |
/* July 5, 1995 - I broke up attack_hth() into 2 parts. In the first |
1031 |
* (attack_hth) we check for weapon use, etc in the second (the new |
1032 |
* function skill_attack() we actually attack. |
1033 |
*/ |
1034 |
static int |
1035 |
attack_hth (object *pl, int dir, const char *string, object *skill) |
1036 |
{ |
1037 |
object *enemy = NULL, *weapon; |
1038 |
|
1039 |
if (QUERY_FLAG (pl, FLAG_READY_WEAPON)) |
1040 |
for (weapon = pl->inv; weapon; weapon = weapon->below) |
1041 |
{ |
1042 |
if (weapon->type == WEAPON && QUERY_FLAG (weapon, FLAG_APPLIED)) |
1043 |
{ |
1044 |
CLEAR_FLAG (weapon, FLAG_APPLIED); |
1045 |
CLEAR_FLAG (pl, FLAG_READY_WEAPON); |
1046 |
pl->update_stats (); |
1047 |
if (pl->type == PLAYER) |
1048 |
{ |
1049 |
new_draw_info (NDI_UNIQUE, 0, pl, "You unwield your weapon in order to attack."); |
1050 |
esrv_update_item (UPD_FLAGS, pl, weapon); |
1051 |
} |
1052 |
|
1053 |
break; |
1054 |
} |
1055 |
} |
1056 |
|
1057 |
return skill_attack (enemy, pl, dir, string, skill); |
1058 |
} |
1059 |
|
1060 |
/* attack_melee_weapon() - this handles melee weapon attacks -b.t. |
1061 |
* For now we are just checking to see if we have a ready weapon here. |
1062 |
* But there is a real neato possible feature of this scheme which |
1063 |
* bears mentioning: |
1064 |
* Since we are only calling this from do_skill() in the future |
1065 |
* we may make this routine handle 'special' melee weapons attacks |
1066 |
* (like disarming manuever with sai) based on player SK_level and |
1067 |
* weapon type. |
1068 |
*/ |
1069 |
static int |
1070 |
attack_melee_weapon (object *op, int dir, const char *string, object *skill) |
1071 |
{ |
1072 |
|
1073 |
if (!QUERY_FLAG (op, FLAG_READY_WEAPON)) |
1074 |
{ |
1075 |
if (op->type == PLAYER) |
1076 |
new_draw_info (NDI_UNIQUE, 0, op, "You have no ready weapon to attack with!"); |
1077 |
|
1078 |
return 0; |
1079 |
} |
1080 |
|
1081 |
return skill_attack (NULL, op, dir, string, skill); |
1082 |
|
1083 |
} |