server/server/rune.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 2003 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992 Frank Tore Johansen
 * 
 * Deliantra is free software: you can redistribute it and/or modify it under
 * the terms of the Affero GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the Affero GNU General Public License
 * and the GNU General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

#include <global.h>
#include <sproto.h>
#include <spells.h>

#ifndef sqr
# define sqr(x) ((x)*(x))
#endif

/*  peterm:  
 *  write_rune:
 *  op:  rune writer
 *  skop: skill object used for casting this rune
 *  dir:  orientation of rune, direction rune's contained spell will
 *          be cast in, if applicable
 *  spell: spell object to put into the rune
 *  level:  level of casting of the rune
 *  runename:  name of the rune or message displayed by the rune for
 *              a rune of marking 
 */
int
write_rune (object *op, object *caster, object *spell, int dir, const char *runename)
{
  object *tmp, *rune_spell, *rune;
  maptile *m;
  sint16 nx, ny;

  if (!dir)
    dir = 1;

  nx = op->x + freearr_x[dir];
  ny = op->y + freearr_y[dir];
  m = op->map;

  if (get_map_flags (m, &m, nx, ny, &nx, &ny) & (P_OUT_OF_MAP | P_SAFE | P_NO_MAGIC | P_NO_CLERIC))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
      return 0;
    }

  for (tmp = m->at (nx, ny).bot; tmp; tmp = tmp->above)
    if (tmp->type == RUNE)
      break;

  if (tmp)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune on top of another rune.");
      return 0;
    }

  if (spell->other_arch)
    rune_spell = spell->other_arch->instance ();
  else
    {
      /* Player specified spell.  The player has to know the spell, so
       * lets just look through the players inventory see if they know it
       * use the item_matched_string for our typical matching method.
       */
      int bestmatch = 0, ms;

      if (!runename || *runename == 0)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Write a rune of what?");
          return 0;
        }

      rune_spell = NULL;
      for (tmp = op->inv; tmp; tmp = tmp->below)
        if (tmp->type == SPELL)
          {
            ms = item_matched_string (op, tmp, runename);
            if (ms > bestmatch)
              {
                bestmatch = ms;
                rune_spell = tmp;
              }
          }

      if (!rune_spell)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "You don't know any spell named %s.", runename);
          return 0;
        }

      if (rune_spell->skill != spell->skill)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "You can't cast %s with %s. H<The spell must be of the %s spell school.>", &rune_spell->name, &spell->name, &spell->skill);
          return 0;
        }

      if (caster->path_denied & spell->path_attuned && !caster->flag [FLAG_WIZCAST])
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "%s belongs to a spell path denied to you.", &rune_spell->name);
          return 0;
        }

      if (casting_level (caster, rune_spell) < rune_spell->level && !caster->flag [FLAG_WIZCAST])
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "%s is beyond your ability to cast! H<Your effetcive casting level is too low.>", &rune_spell->name);
          return 0;
        }

      if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA) > op->stats.sp)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough mana.");
          return 0;
        }

      if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE) > op->stats.grace)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough grace.");
          return 0;
        }

      op->stats.grace -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE);
      op->stats.sp    -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA);
    }

  /* already proper rune.  Note this should only be the case if other_arch was set */
  if (rune_spell->type == RUNE)
    rune = rune_spell;
  else
    {
      rune = get_archetype (GENERIC_RUNE);
      rune->msg = format ("You set off a rune of %s\n", &rune_spell->name);
      rune->insert (rune_spell->clone ());

      if (spell->face != blank_face)
        rune->face = spell->face;
    }

  rune->level = casting_level (caster, spell);
  rune->stats.Cha = rune->level / 2;    /* the invisibility parameter */
  rune->direction = dir;        /* where any spell will go upon detonation */
  rune->set_owner (op);         /* runes without need no owner */
  set_spell_skill (op, caster, spell, rune);

  m->insert (rune, nx, ny, op);
  return 1;
}

/*  move_rune:  peterm
  comments on runes:
    rune->level     :       level at which rune will cast its spell.
    rune->hp        :       number of detonations before rune goes away
    rune->msg       :       message the rune displays when it goes off
    rune->direction :       direction it will cast a spell in
    rune->dam       :       damage the rune will do if it doesn't cast spells
    rune->attacktype:       type of damage it does, if not casting spells
    rune->other_arch:       spell in the rune
    rune->Cha       :       how hidden the rune is
    rune->maxhp     :       number of spells the rune casts
*/
void
move_rune (object *op)
{
  /* runes of level zero cannot detonate. */
  if (!op->level)
    return;

  int det = op->invisible;

  if (!(rndm (0, max (1, (op->stats.Cha)) - 1)))
    {
      op->invisible = 0;
      op->speed_left -= 1;
    }
  else
    op->invisible = 1;

  if (op->invisible != det)
    update_object (op, UP_OBJ_CHANGE);
}

/*  peterm: rune_attack
 * function handles those runes which detonate but do not cast spells.  
 */
static void
rune_attack (object *op, object *victim)
{
  if (victim)
    {
      hit_player (victim, op->stats.dam, op, op->attacktype, 1);

      if (victim->destroyed ())
        return;

      /*  if there's a disease in the needle, put it in the player */
      if (op->has_random_items ())
        create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);

      if (op->inv && op->inv->type == DISEASE)
        {
          object *disease = op->inv;

          infect_object (victim, disease, 1);
          disease->destroy ();
        }
    }
  else
    hit_map (op, 0, op->attacktype, 1);
}

/*  This function generalizes attacks by runes/traps.  This ought to make
 *  it possible for runes to attack from the inventory, 
 *  it'll spring the trap on the victim.
 */
void
spring_trap (object *trap, object *victim)
{
  object *env;
  rv_vector rv;
  int i;

  /* Prevent recursion */
  if (trap->stats.hp <= 0)
    return;

  if (QUERY_FLAG (trap, FLAG_IS_LINKED))
    use_trigger (trap, victim);

  /* Only living objects can trigger runes that don't cast spells, as
   * doing direct damage to a non-living object doesn't work anyway.
   * Typical example is an arrow attacking a door.
   */
  if (!QUERY_FLAG (victim, FLAG_ALIVE) && !trap->inv && !trap->other_arch)
    return;

  trap->stats.hp--;             /*decrement detcount */

  if (victim && victim->type == PLAYER)
    new_draw_info (NDI_UNIQUE, 0, victim, trap->msg);

  /*  Flash an image of the trap on the map so the poor sod
   *   knows what hit him.  
   */
  env = trap->outer_env_or_self ();

  /* If the victim is not next to this trap, don't set it off.
   * players shouldn't get hit by firing arrows at a door for example.
   * At the same time, the trap will stick around until detonated
   */
  get_rangevector (env, victim, &rv, 0);
  if (rv.distance > 1)
    return;

  env->play_sound (trap->sound ? trap->sound : sound_find ("trap_spring"));

  trap_show (trap, env);

  if (victim->type == PLAYER) // only count players as enemies
    trap->enemy = victim; // set the victim as the traps enemy, so that summoned
                          // creatures know who to attack.

  /* Only if it is a spell do we proceed here */
  if ((trap->inv && trap->inv->type == SPELL) || (trap->other_arch && trap->other_arch->type == SPELL))
    {
      if (trap->destroyed ())
        return;

      // breaks summon golem spells, which, for inexplicable reasons,
      // do not work like summon golem spells at all but still require
      // direction "0" to work at all.
      //if (trap->direction)
      //  rv.direction = trap->direction;

      for (i = 0; i < max (1, trap->stats.maxhp); i++)
        {
          if (trap->inv)
            cast_spell (env, trap, trap->direction, trap->inv, NULL);
          else
            {
              object *spell = trap->other_arch->instance ();

              cast_spell (env, trap, trap->direction, spell, NULL);
              spell->destroy ();
            }
        }
    }
  else
    {
      rune_attack (trap, victim);
      if (trap->destroyed ())
        return;
    }

  if (trap->stats.hp <= 0)
    {
      trap->type = SIGN;        /* make the trap impotent */
      trap->stats.food = 20;    /* make it stick around until its spells are gone */
      SET_FLAG (trap, FLAG_IS_USED_UP);
    }
}

/* dispel_rune:  by peterm  
 * dispels the target rune, depending on the level of the actor
 * and the level of the rune  risk flag, if true, means that there is
 * a chance that the trap/rune will detonate 
 */
int
dispel_rune (object *op, object *caster, object *spell, object *skill, int dir)
{
  object *tmp, *tmp2;
  int searchflag = 1, mflags;
  sint16 x, y;
  maptile *m;

  x = op->x + freearr_x[dir];
  y = op->y + freearr_y[dir];
  m = op->map;

  mflags = get_map_flags (m, &m, x, y, &x, &y);

  /* Should we perhaps not allow player to disable traps if a monster/
   * player is standing on top? 
   */
  if (mflags & P_OUT_OF_MAP)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
      return 0;
    }

  for (tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
    {
      if (tmp->type == RUNE || tmp->type == TRAP)
        break;

      /* we could put a probability chance here, but since nothing happens
       * if you fail, no point on that.  I suppose we could do a level
       * comparison so low level players can't erase high level players runes.
       */
      if (tmp->type == SIGN && tmp->arch->archname == shstr_rune_mark)
        {
          tmp->destroy ();
          new_draw_info (NDI_UNIQUE, 0, op, "You wipe out the rune of marking!");
          return 1;
        }

      /* now search tmp's inventory for traps
       * This is for chests, where the rune is in the chests inventory.
       */
      for (tmp2 = tmp->inv; tmp2; tmp2 = tmp2->below)
        {
          if (tmp2->type == RUNE || tmp2->type == TRAP)
            {
              tmp = tmp2;
              searchflag = 0;
              break;
            }
        }

      if (!searchflag)
        break;
    }

  /* no rune there. */
  if (tmp == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
      return 0;
    }

  trap_disarm (op, tmp, 0, skill);
  return 1;
}

int
trap_see (object *op, object *trap)
{
  int chance;

  chance = random_roll (0, 99, op, PREFER_HIGH);;

  /*  decide if we see the rune or not */
  if ((trap->stats.Cha == 1) || (chance > min (95, max (5, ((int) ((float) (op->map->difficulty
                                                                            + trap->level + trap->stats.Cha - op->level) / 10.0 * 50.0))))))
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "You spot a %s!", &trap->name);
      return 1;
    }

  return 0;
}

int
trap_show (object *trap, object *where)
{
  if (where == NULL)
    return 0;

  object *tmp = get_archetype (shstr_runedet);
  tmp->face = trap->get_anim_frame (0);
  tmp->insert_at (where, 0);

  return 1;
}

int
trap_disarm (object *disarmer, object *trap, int risk, object *skill)
{
  int trapworth; /* need to compute the experience worth of the trap before we kill it */

  /* this formula awards a more reasonable amount of exp */
  trapworth = max (1, trap->level)
            * disarmer->map->difficulty
            * sqr (max (trap->stats.dam, trap->inv ? trap->inv->level : 1))
            / skill->level;

  if (!(random_roll (0, (max (2, min (20, trap->level - skill->level + 5 - disarmer->stats.Dex / 2)) - 1), disarmer, PREFER_LOW)))
    {
      new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You successfully disarm the %s!", &trap->name);
      trap->destroy ();

      /* If it is your own trap, (or any players trap), don't you don't
       * get exp for it.
       */
      if (trap->owner && trap->owner->type != PLAYER && risk)
        return trapworth;
      else
        return 1;               /* give minimal exp and say success */
    }
  else
    {
      new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You fail to disarm the %s.", &trap->name);
      if (!(random_roll (0, (max (2, skill->level - trap->level + disarmer->stats.Dex / 2 - 6)) - 1, disarmer, PREFER_LOW)) && risk)
        {
          new_draw_info (NDI_UNIQUE, 0, disarmer, "In fact, you set it off!");
          spring_trap (trap, disarmer);
        }
      return 0;
    }
}

/*  traps need to be adjusted for the difficulty of the map.  The
 * default traps are too strong for wimpy level 1 players, and 
 * unthreatening to anyone of high level 
 */
void
trap_adjust (object *trap, int difficulty)
{
  int i;

  /* now we set the trap level to match the difficulty of the level
   * the formula below will give a level from 1 to (2*difficulty) with 
   * a peak probability at difficulty 
   */

  trap->level = rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
  if (trap->level < 1)
    trap->level = 1;

  /* set the hiddenness of the trap, similar formula to above */
  trap->stats.Cha = rndm (0, 19) + rndm (0, difficulty - 1) + rndm (0, difficulty - 1);

  if (!trap->other_arch && !trap->inv)
    {
      /* set the damage of the trap.
       * we get 0-4 pts of damage per level of difficulty of the map in
       * the trap
       */

      trap->stats.dam = 0;
      for (i = 0; i < difficulty; i++)
        trap->stats.dam += rndm (0, 4);

      /*  the poison trap special case */
      if (trap->attacktype & AT_POISON)
        {
          trap->stats.dam = rndm (0, difficulty - 1);
          if (trap->stats.dam < 1)
            trap->stats.dam = 1;
        }

      /*  so we get an appropriate amnt of exp for AT_DEATH traps */
      if (trap->attacktype & AT_DEATH)
        trap->stats.dam = 127;
    }

}
Revision:	1.47
Committed:	Fri Mar 26 00:59:22 2010 UTC (14 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.46:	+2 -2 lines
Log Message:	remove bogus 2007 copyright that was added wrongly by the script, update to affero license
#	Content
1	/*
2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	*
4	* Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	* Copyright (©) 2003 Mark Wedel & Crossfire Development Team
6	* Copyright (©) 1992 Frank Tore Johansen
7	*
8	* Deliantra is free software: you can redistribute it and/or modify it under
9	* the terms of the Affero GNU General Public License as published by the
10	* Free Software Foundation, either version 3 of the License, or (at your
11	* option) any later version.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the Affero GNU General Public License
19	* and the GNU General Public License along with this program. If not, see
20	* <http://www.gnu.org/licenses/>.
21	*
22	* The authors can be reached via e-mail to <support@deliantra.net>
23	*/
24
25	#include <global.h>
26	#include <sproto.h>
27	#include <spells.h>
28
29	#ifndef sqr
30	# define sqr(x) ((x)*(x))
31	#endif
32
33	/* peterm:
34	* write_rune:
35	* op: rune writer
36	* skop: skill object used for casting this rune
37	* dir: orientation of rune, direction rune's contained spell will
38	* be cast in, if applicable
39	* spell: spell object to put into the rune
40	* level: level of casting of the rune
41	* runename: name of the rune or message displayed by the rune for
42	* a rune of marking
43	*/
44	int
45	write_rune (object op, object caster, object spell, int dir, const char runename)
46	{
47	object tmp, rune_spell, *rune;
48	maptile *m;
49	sint16 nx, ny;
50
51	if (!dir)
52	dir = 1;
53
54	nx = op->x + freearr_x[dir];
55	ny = op->y + freearr_y[dir];
56	m = op->map;
57
58	if (get_map_flags (m, &m, nx, ny, &nx, &ny) & (P_OUT_OF_MAP \| P_SAFE \| P_NO_MAGIC \| P_NO_CLERIC))
59	{
60	new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
61	return 0;
62	}
63
64	for (tmp = m->at (nx, ny).bot; tmp; tmp = tmp->above)
65	if (tmp->type == RUNE)
66	break;
67
68	if (tmp)
69	{
70	new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune on top of another rune.");
71	return 0;
72	}
73
74	if (spell->other_arch)
75	rune_spell = spell->other_arch->instance ();
76	else
77	{
78	/* Player specified spell. The player has to know the spell, so
79	* lets just look through the players inventory see if they know it
80	* use the item_matched_string for our typical matching method.
81	*/
82	int bestmatch = 0, ms;
83
84	if (!runename \|\| *runename == 0)
85	{
86	new_draw_info (NDI_UNIQUE, 0, op, "Write a rune of what?");
87	return 0;
88	}
89
90	rune_spell = NULL;
91	for (tmp = op->inv; tmp; tmp = tmp->below)
92	if (tmp->type == SPELL)
93	{
94	ms = item_matched_string (op, tmp, runename);
95	if (ms > bestmatch)
96	{
97	bestmatch = ms;
98	rune_spell = tmp;
99	}
100	}
101
102	if (!rune_spell)
103	{
104	new_draw_info_format (NDI_UNIQUE, 0, op, "You don't know any spell named %s.", runename);
105	return 0;
106	}
107
108	if (rune_spell->skill != spell->skill)
109	{
110	new_draw_info_format (NDI_UNIQUE, 0, op, "You can't cast %s with %s. H<The spell must be of the %s spell school.>", &rune_spell->name, &spell->name, &spell->skill);
111	return 0;
112	}
113
114	if (caster->path_denied & spell->path_attuned && !caster->flag [FLAG_WIZCAST])
115	{
116	new_draw_info_format (NDI_UNIQUE, 0, op, "%s belongs to a spell path denied to you.", &rune_spell->name);
117	return 0;
118	}
119
120	if (casting_level (caster, rune_spell) < rune_spell->level && !caster->flag [FLAG_WIZCAST])
121	{
122	new_draw_info_format (NDI_UNIQUE, 0, op, "%s is beyond your ability to cast! H<Your effetcive casting level is too low.>", &rune_spell->name);
123	return 0;
124	}
125
126	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA) > op->stats.sp)
127	{
128	new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough mana.");
129	return 0;
130	}
131
132	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE) > op->stats.grace)
133	{
134	new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough grace.");
135	return 0;
136	}
137
138	op->stats.grace -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE);
139	op->stats.sp -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA);
140	}
141
142	/* already proper rune. Note this should only be the case if other_arch was set */
143	if (rune_spell->type == RUNE)
144	rune = rune_spell;
145	else
146	{
147	rune = get_archetype (GENERIC_RUNE);
148	rune->msg = format ("You set off a rune of %s\n", &rune_spell->name);
149	rune->insert (rune_spell->clone ());
150
151	if (spell->face != blank_face)
152	rune->face = spell->face;
153	}
154
155	rune->level = casting_level (caster, spell);
156	rune->stats.Cha = rune->level / 2; /* the invisibility parameter */
157	rune->direction = dir; /* where any spell will go upon detonation */
158	rune->set_owner (op); /* runes without need no owner */
159	set_spell_skill (op, caster, spell, rune);
160
161	m->insert (rune, nx, ny, op);
162	return 1;
163	}
164
165	/* move_rune: peterm
166	comments on runes:
167	rune->level : level at which rune will cast its spell.
168	rune->hp : number of detonations before rune goes away
169	rune->msg : message the rune displays when it goes off
170	rune->direction : direction it will cast a spell in
171	rune->dam : damage the rune will do if it doesn't cast spells
172	rune->attacktype: type of damage it does, if not casting spells
173	rune->other_arch: spell in the rune
174	rune->Cha : how hidden the rune is
175	rune->maxhp : number of spells the rune casts
176	*/
177	void
178	move_rune (object *op)
179	{
180	/* runes of level zero cannot detonate. */
181	if (!op->level)
182	return;
183
184	int det = op->invisible;
185
186	if (!(rndm (0, max (1, (op->stats.Cha)) - 1)))
187	{
188	op->invisible = 0;
189	op->speed_left -= 1;
190	}
191	else
192	op->invisible = 1;
193
194	if (op->invisible != det)
195	update_object (op, UP_OBJ_CHANGE);
196	}
197
198	/* peterm: rune_attack
199	* function handles those runes which detonate but do not cast spells.
200	*/
201	static void
202	rune_attack (object op, object victim)
203	{
204	if (victim)
205	{
206	hit_player (victim, op->stats.dam, op, op->attacktype, 1);
207
208	if (victim->destroyed ())
209	return;
210
211	/* if there's a disease in the needle, put it in the player */
212	if (op->has_random_items ())
213	create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);
214
215	if (op->inv && op->inv->type == DISEASE)
216	{
217	object *disease = op->inv;
218
219	infect_object (victim, disease, 1);
220	disease->destroy ();
221	}
222	}
223	else
224	hit_map (op, 0, op->attacktype, 1);
225	}
226
227	/* This function generalizes attacks by runes/traps. This ought to make
228	* it possible for runes to attack from the inventory,
229	* it'll spring the trap on the victim.
230	*/
231	void
232	spring_trap (object trap, object victim)
233	{
234	object *env;
235	rv_vector rv;
236	int i;
237
238	/* Prevent recursion */
239	if (trap->stats.hp <= 0)
240	return;
241
242	if (QUERY_FLAG (trap, FLAG_IS_LINKED))
243	use_trigger (trap, victim);
244
245	/* Only living objects can trigger runes that don't cast spells, as
246	* doing direct damage to a non-living object doesn't work anyway.
247	* Typical example is an arrow attacking a door.
248	*/
249	if (!QUERY_FLAG (victim, FLAG_ALIVE) && !trap->inv && !trap->other_arch)
250	return;
251
252	trap->stats.hp--; /decrement detcount /
253
254	if (victim && victim->type == PLAYER)
255	new_draw_info (NDI_UNIQUE, 0, victim, trap->msg);
256
257	/* Flash an image of the trap on the map so the poor sod
258	* knows what hit him.
259	*/
260	env = trap->outer_env_or_self ();
261
262	/* If the victim is not next to this trap, don't set it off.
263	* players shouldn't get hit by firing arrows at a door for example.
264	* At the same time, the trap will stick around until detonated
265	*/
266	get_rangevector (env, victim, &rv, 0);
267	if (rv.distance > 1)
268	return;
269
270	env->play_sound (trap->sound ? trap->sound : sound_find ("trap_spring"));
271
272	trap_show (trap, env);
273
274	if (victim->type == PLAYER) // only count players as enemies
275	trap->enemy = victim; // set the victim as the traps enemy, so that summoned
276	// creatures know who to attack.
277
278	/* Only if it is a spell do we proceed here */
279	if ((trap->inv && trap->inv->type == SPELL) \|\| (trap->other_arch && trap->other_arch->type == SPELL))
280	{
281	if (trap->destroyed ())
282	return;
283
284	// breaks summon golem spells, which, for inexplicable reasons,
285	// do not work like summon golem spells at all but still require
286	// direction "0" to work at all.
287	//if (trap->direction)
288	// rv.direction = trap->direction;
289
290	for (i = 0; i < max (1, trap->stats.maxhp); i++)
291	{
292	if (trap->inv)
293	cast_spell (env, trap, trap->direction, trap->inv, NULL);
294	else
295	{
296	object *spell = trap->other_arch->instance ();
297
298	cast_spell (env, trap, trap->direction, spell, NULL);
299	spell->destroy ();
300	}
301	}
302	}
303	else
304	{
305	rune_attack (trap, victim);
306	if (trap->destroyed ())
307	return;
308	}
309
310	if (trap->stats.hp <= 0)
311	{
312	trap->type = SIGN; /* make the trap impotent */
313	trap->stats.food = 20; /* make it stick around until its spells are gone */
314	SET_FLAG (trap, FLAG_IS_USED_UP);
315	}
316	}
317
318	/* dispel_rune: by peterm
319	* dispels the target rune, depending on the level of the actor
320	* and the level of the rune risk flag, if true, means that there is
321	* a chance that the trap/rune will detonate
322	*/
323	int
324	dispel_rune (object op, object caster, object spell, object skill, int dir)
325	{
326	object tmp, tmp2;
327	int searchflag = 1, mflags;
328	sint16 x, y;
329	maptile *m;
330
331	x = op->x + freearr_x[dir];
332	y = op->y + freearr_y[dir];
333	m = op->map;
334
335	mflags = get_map_flags (m, &m, x, y, &x, &y);
336
337	/* Should we perhaps not allow player to disable traps if a monster/
338	* player is standing on top?
339	*/
340	if (mflags & P_OUT_OF_MAP)
341	{
342	new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
343	return 0;
344	}
345
346	for (tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
347	{
348	if (tmp->type == RUNE \|\| tmp->type == TRAP)
349	break;
350
351	/* we could put a probability chance here, but since nothing happens
352	* if you fail, no point on that. I suppose we could do a level
353	* comparison so low level players can't erase high level players runes.
354	*/
355	if (tmp->type == SIGN && tmp->arch->archname == shstr_rune_mark)
356	{
357	tmp->destroy ();
358	new_draw_info (NDI_UNIQUE, 0, op, "You wipe out the rune of marking!");
359	return 1;
360	}
361
362	/* now search tmp's inventory for traps
363	* This is for chests, where the rune is in the chests inventory.
364	*/
365	for (tmp2 = tmp->inv; tmp2; tmp2 = tmp2->below)
366	{
367	if (tmp2->type == RUNE \|\| tmp2->type == TRAP)
368	{
369	tmp = tmp2;
370	searchflag = 0;
371	break;
372	}
373	}
374
375	if (!searchflag)
376	break;
377	}
378
379	/* no rune there. */
380	if (tmp == NULL)
381	{
382	new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
383	return 0;
384	}
385
386	trap_disarm (op, tmp, 0, skill);
387	return 1;
388	}
389
390	int
391	trap_see (object op, object trap)
392	{
393	int chance;
394
395	chance = random_roll (0, 99, op, PREFER_HIGH);;
396
397	/* decide if we see the rune or not */
398	if ((trap->stats.Cha == 1) \|\| (chance > min (95, max (5, ((int) ((float) (op->map->difficulty
399	+ trap->level + trap->stats.Cha - op->level) / 10.0 * 50.0))))))
400	{
401	new_draw_info_format (NDI_UNIQUE, 0, op, "You spot a %s!", &trap->name);
402	return 1;
403	}
404
405	return 0;
406	}
407
408	int
409	trap_show (object trap, object where)
410	{
411	if (where == NULL)
412	return 0;
413
414	object *tmp = get_archetype (shstr_runedet);
415	tmp->face = trap->get_anim_frame (0);
416	tmp->insert_at (where, 0);
417
418	return 1;
419	}
420
421	int
422	trap_disarm (object disarmer, object trap, int risk, object *skill)
423	{
424	int trapworth; /* need to compute the experience worth of the trap before we kill it */
425
426	/* this formula awards a more reasonable amount of exp */
427	trapworth = max (1, trap->level)
428	* disarmer->map->difficulty
429	* sqr (max (trap->stats.dam, trap->inv ? trap->inv->level : 1))
430	/ skill->level;
431
432	if (!(random_roll (0, (max (2, min (20, trap->level - skill->level + 5 - disarmer->stats.Dex / 2)) - 1), disarmer, PREFER_LOW)))
433	{
434	new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You successfully disarm the %s!", &trap->name);
435	trap->destroy ();
436
437	/* If it is your own trap, (or any players trap), don't you don't
438	* get exp for it.
439	*/
440	if (trap->owner && trap->owner->type != PLAYER && risk)
441	return trapworth;
442	else
443	return 1; /* give minimal exp and say success */
444	}
445	else
446	{
447	new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You fail to disarm the %s.", &trap->name);
448	if (!(random_roll (0, (max (2, skill->level - trap->level + disarmer->stats.Dex / 2 - 6)) - 1, disarmer, PREFER_LOW)) && risk)
449	{
450	new_draw_info (NDI_UNIQUE, 0, disarmer, "In fact, you set it off!");
451	spring_trap (trap, disarmer);
452	}
453	return 0;
454	}
455	}
456
457	/* traps need to be adjusted for the difficulty of the map. The
458	* default traps are too strong for wimpy level 1 players, and
459	* unthreatening to anyone of high level
460	*/
461	void
462	trap_adjust (object *trap, int difficulty)
463	{
464	int i;
465
466	/* now we set the trap level to match the difficulty of the level
467	* the formula below will give a level from 1 to (2*difficulty) with
468	* a peak probability at difficulty
469	*/
470
471	trap->level = rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
472	if (trap->level < 1)
473	trap->level = 1;
474
475	/* set the hiddenness of the trap, similar formula to above */
476	trap->stats.Cha = rndm (0, 19) + rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
477
478	if (!trap->other_arch && !trap->inv)
479	{
480	/* set the damage of the trap.
481	* we get 0-4 pts of damage per level of difficulty of the map in
482	* the trap
483	*/
484
485	trap->stats.dam = 0;
486	for (i = 0; i < difficulty; i++)
487	trap->stats.dam += rndm (0, 4);
488
489	/* the poison trap special case */
490	if (trap->attacktype & AT_POISON)
491	{
492	trap->stats.dam = rndm (0, difficulty - 1);
493	if (trap->stats.dam < 1)
494	trap->stats.dam = 1;
495	}
496
497	/* so we get an appropriate amnt of exp for AT_DEATH traps */
498	if (trap->attacktype & AT_DEATH)
499	trap->stats.dam = 127;
500	}
501
502	}