server/server/rune.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 2003,2007 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992,2007 Frank Tore Johansen
 * 
 * Deliantra is free software: you can redistribute it and/or modify
 * it under the terms of the 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 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
 *  inspell: spell object to put into the rune, can be null if doing
 *    a marking 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;
  char buf[MAX_BUF];
  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 = arch_to_object (spell->other_arch);
  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);
      sprintf (buf, "You set off a rune of %s\n", &rune_spell->name);
      rune->msg = buf;
      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.  
 */
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);

  /* 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 ();

  /* 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 = arch_to_object (trap->other_arch);

              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 != NULL; 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 && !strcmp (tmp->arch->archname, "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 != NULL; 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 ("runedet");
  tmp->face = GET_ANIMATION (trap, 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:	1.37
Committed:	Sat Dec 20 01:46:46 2008 UTC (15 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_74
Changes since 1.36:	+3 -3 lines
Log Message:	some hints
#	Content
1	/*
2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	*
4	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	* Copyright (©) 2003,2007 Mark Wedel & Crossfire Development Team
6	* Copyright (©) 1992,2007 Frank Tore Johansen
7	*
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
10	* the Free Software Foundation, either version 3 of the License, or
11	* (at your 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 GNU General Public License
19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
20	*
21	* The authors can be reached via e-mail to <support@deliantra.net>
22	*/
23
24	#include <global.h>
25	#include <sproto.h>
26	#include <spells.h>
27
28	#ifndef sqr
29	# define sqr(x) ((x)*(x))
30	#endif
31
32	/* peterm:
33	* write_rune:
34	* op: rune writer
35	* skop: skill object used for casting this rune
36	* dir: orientation of rune, direction rune's contained spell will
37	* be cast in, if applicable
38	* inspell: spell object to put into the rune, can be null if doing
39	* a marking 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
45	int
46	write_rune (object op, object caster, object spell, int dir, const char runename)
47	{
48	object tmp, rune_spell, *rune;
49	char buf[MAX_BUF];
50	maptile *m;
51	sint16 nx, ny;
52
53	if (!dir)
54	dir = 1;
55
56	nx = op->x + freearr_x[dir];
57	ny = op->y + freearr_y[dir];
58	m = op->map;
59
60	if (get_map_flags (m, &m, nx, ny, &nx, &ny) & (P_OUT_OF_MAP \| P_SAFE \| P_NO_MAGIC \| P_NO_CLERIC))
61	{
62	new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
63	return 0;
64	}
65
66	for (tmp = m->at (nx, ny).bot; tmp; tmp = tmp->above)
67	if (tmp->type == RUNE)
68	break;
69
70	if (tmp)
71	{
72	new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune on top of another rune.");
73	return 0;
74	}
75
76	if (spell->other_arch)
77	rune_spell = arch_to_object (spell->other_arch);
78	else
79	{
80	/* Player specified spell. The player has to know the spell, so
81	* lets just look through the players inventory see if they know it
82	* use the item_matched_string for our typical matching method.
83	*/
84	int bestmatch = 0, ms;
85
86	if (!runename \|\| *runename == 0)
87	{
88	new_draw_info (NDI_UNIQUE, 0, op, "Write a rune of what?");
89	return 0;
90	}
91
92	rune_spell = NULL;
93	for (tmp = op->inv; tmp; tmp = tmp->below)
94	if (tmp->type == SPELL)
95	{
96	ms = item_matched_string (op, tmp, runename);
97	if (ms > bestmatch)
98	{
99	bestmatch = ms;
100	rune_spell = tmp;
101	}
102	}
103
104	if (!rune_spell)
105	{
106	new_draw_info_format (NDI_UNIQUE, 0, op, "You don't know any spell named %s.", runename);
107	return 0;
108	}
109
110	if (rune_spell->skill != spell->skill)
111	{
112	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);
113	return 0;
114	}
115
116	if (caster->path_denied & spell->path_attuned && !caster->flag [FLAG_WIZCAST])
117	{
118	new_draw_info_format (NDI_UNIQUE, 0, op, "%s belongs to a spell path denied to you.", &rune_spell->name);
119	return 0;
120	}
121
122	if (casting_level (caster, rune_spell) < rune_spell->level && !caster->flag [FLAG_WIZCAST])
123	{
124	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);
125	return 0;
126	}
127
128	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA) > op->stats.sp)
129	{
130	new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough mana.");
131	return 0;
132	}
133
134	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE) > op->stats.grace)
135	{
136	new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough grace.");
137	return 0;
138	}
139
140	op->stats.grace -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE);
141	op->stats.sp -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA);
142	}
143
144	/* already proper rune. Note this should only be the case if other_arch was set */
145	if (rune_spell->type == RUNE)
146	rune = rune_spell;
147	else
148	{
149	rune = get_archetype (GENERIC_RUNE);
150	sprintf (buf, "You set off a rune of %s\n", &rune_spell->name);
151	rune->msg = buf;
152	rune->insert (rune_spell->clone ());
153
154	if (spell->face != blank_face)
155	rune->face = spell->face;
156	}
157
158	rune->level = casting_level (caster, spell);
159	rune->stats.Cha = rune->level / 2; /* the invisibility parameter */
160	rune->direction = dir; /* where any spell will go upon detonation */
161	rune->set_owner (op); /* runes without need no owner */
162	set_spell_skill (op, caster, spell, rune);
163
164	m->insert (rune, nx, ny, op);
165	return 1;
166	}
167
168	/* move_rune: peterm
169	comments on runes:
170	rune->level : level at which rune will cast its spell.
171	rune->hp : number of detonations before rune goes away
172	rune->msg : message the rune displays when it goes off
173	rune->direction : direction it will cast a spell in
174	rune->dam : damage the rune will do if it doesn't cast spells
175	rune->attacktype: type of damage it does, if not casting spells
176	rune->other_arch: spell in the rune
177	rune->Cha : how hidden the rune is
178	rune->maxhp : number of spells the rune casts
179	*/
180	void
181	move_rune (object *op)
182	{
183	/* runes of level zero cannot detonate. */
184	if (!op->level)
185	return;
186
187	int det = op->invisible;
188
189	if (!(rndm (0, MAX (1, (op->stats.Cha)) - 1)))
190	{
191	op->invisible = 0;
192	op->speed_left -= 1;
193	}
194	else
195	op->invisible = 1;
196
197	if (op->invisible != det)
198	update_object (op, UP_OBJ_CHANGE);
199	}
200
201	/* peterm: rune_attack
202	* function handles those runes which detonate but do not cast spells.
203	*/
204	void
205	rune_attack (object op, object victim)
206	{
207	if (victim)
208	{
209	hit_player (victim, op->stats.dam, op, op->attacktype, 1);
210
211	if (victim->destroyed ())
212	return;
213
214	/* if there's a disease in the needle, put it in the player */
215	if (op->has_random_items ())
216	create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);
217
218	if (op->inv && op->inv->type == DISEASE)
219	{
220	object *disease = op->inv;
221
222	infect_object (victim, disease, 1);
223	disease->destroy ();
224	}
225	}
226	else
227	hit_map (op, 0, op->attacktype, 1);
228	}
229
230	/* This function generalizes attacks by runes/traps. This ought to make
231	* it possible for runes to attack from the inventory,
232	* it'll spring the trap on the victim.
233	*/
234	void
235	spring_trap (object trap, object victim)
236	{
237	object *env;
238	rv_vector rv;
239	int i;
240
241	/* Prevent recursion */
242	if (trap->stats.hp <= 0)
243	return;
244
245	if (QUERY_FLAG (trap, FLAG_IS_LINKED))
246	use_trigger (trap);
247
248	/* Only living objects can trigger runes that don't cast spells, as
249	* doing direct damage to a non-living object doesn't work anyway.
250	* Typical example is an arrow attacking a door.
251	*/
252	if (!QUERY_FLAG (victim, FLAG_ALIVE) && !trap->inv && !trap->other_arch)
253	return;
254
255	trap->stats.hp--; /decrement detcount /
256
257	if (victim && victim->type == PLAYER)
258	new_draw_info (NDI_UNIQUE, 0, victim, trap->msg);
259
260	/* Flash an image of the trap on the map so the poor sod
261	* knows what hit him.
262	*/
263	env = trap->outer_env ();
264
265	/* If the victim is not next to this trap, don't set it off.
266	* players shouldn't get hit by firing arrows at a door for example.
267	* At the same time, the trap will stick around until detonated
268	*/
269	get_rangevector (env, victim, &rv, 0);
270	if (rv.distance > 1)
271	return;
272
273	env->play_sound (trap->sound ? trap->sound : sound_find ("trap_spring"));
274
275	trap_show (trap, env);
276
277	if (victim->type == PLAYER) // only count players as enemies
278	trap->enemy = victim; // set the victim as the traps enemy, so that summoned
279	// creatures know who to attack.
280
281	/* Only if it is a spell do we proceed here */
282	if ((trap->inv && trap->inv->type == SPELL) \|\| (trap->other_arch && trap->other_arch->type == SPELL))
283	{
284	if (trap->destroyed ())
285	return;
286
287	// breaks summon golem spells, which, for inexplicable reasons,
288	// do not work like summon golem spells at all but still require
289	// direction "0" to work at all.
290	//if (trap->direction)
291	// rv.direction = trap->direction;
292
293	for (i = 0; i < MAX (1, trap->stats.maxhp); i++)
294	{
295	if (trap->inv)
296	cast_spell (env, trap, trap->direction, trap->inv, NULL);
297	else
298	{
299	object *spell = arch_to_object (trap->other_arch);
300
301	cast_spell (env, trap, trap->direction, spell, NULL);
302	spell->destroy ();
303	}
304	}
305	}
306	else
307	{
308	rune_attack (trap, victim);
309	if (trap->destroyed ())
310	return;
311	}
312
313	if (trap->stats.hp <= 0)
314	{
315	trap->type = SIGN; /* make the trap impotent */
316	trap->stats.food = 20; /* make it stick around until its spells are gone */
317	SET_FLAG (trap, FLAG_IS_USED_UP);
318	}
319	}
320
321	/* dispel_rune: by peterm
322	* dispels the target rune, depending on the level of the actor
323	* and the level of the rune risk flag, if true, means that there is
324	* a chance that the trap/rune will detonate
325	*/
326	int
327	dispel_rune (object op, object caster, object spell, object skill, int dir)
328	{
329	object tmp, tmp2;
330	int searchflag = 1, mflags;
331	sint16 x, y;
332	maptile *m;
333
334	x = op->x + freearr_x[dir];
335	y = op->y + freearr_y[dir];
336	m = op->map;
337
338	mflags = get_map_flags (m, &m, x, y, &x, &y);
339
340	/* Should we perhaps not allow player to disable traps if a monster/
341	* player is standing on top?
342	*/
343	if (mflags & P_OUT_OF_MAP)
344	{
345	new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
346	return 0;
347	}
348
349	for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above)
350	{
351	if (tmp->type == RUNE \|\| tmp->type == TRAP)
352	break;
353
354	/* we could put a probability chance here, but since nothing happens
355	* if you fail, no point on that. I suppose we could do a level
356	* comparison so low level players can't erase high level players runes.
357	*/
358	if (tmp->type == SIGN && !strcmp (tmp->arch->archname, "rune_mark"))
359	{
360	tmp->destroy ();
361	new_draw_info (NDI_UNIQUE, 0, op, "You wipe out the rune of marking!");
362	return 1;
363	}
364
365	/* now search tmp's inventory for traps
366	* This is for chests, where the rune is in the chests inventory.
367	*/
368	for (tmp2 = tmp->inv; tmp2 != NULL; tmp2 = tmp2->below)
369	{
370	if (tmp2->type == RUNE \|\| tmp2->type == TRAP)
371	{
372	tmp = tmp2;
373	searchflag = 0;
374	break;
375	}
376	}
377	if (!searchflag)
378	break;
379	}
380
381	/* no rune there. */
382	if (tmp == NULL)
383	{
384	new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
385	return 0;
386	}
387
388	trap_disarm (op, tmp, 0, skill);
389	return 1;
390	}
391
392	int
393	trap_see (object op, object trap)
394	{
395	int chance;
396
397	chance = random_roll (0, 99, op, PREFER_HIGH);;
398
399	/* decide if we see the rune or not */
400	if ((trap->stats.Cha == 1) \|\| (chance > MIN (95, MAX (5, ((int) ((float) (op->map->difficulty
401	+ trap->level + trap->stats.Cha - op->level) / 10.0 * 50.0))))))
402	{
403	new_draw_info_format (NDI_UNIQUE, 0, op, "You spot a %s!", &trap->name);
404	return 1;
405	}
406
407	return 0;
408	}
409
410	int
411	trap_show (object trap, object where)
412	{
413	if (where == NULL)
414	return 0;
415
416	object *tmp = get_archetype ("runedet");
417	tmp->face = GET_ANIMATION (trap, 0);
418	tmp->insert_at (where, 0);
419
420	return 1;
421	}
422
423	int
424	trap_disarm (object disarmer, object trap, int risk, object *skill)
425	{
426	int trapworth; /* need to compute the experience worth of the trap before we kill it */
427
428	/* this formula awards a more reasonable amount of exp */
429	trapworth = MAX (1, trap->level)
430	* disarmer->map->difficulty
431	* sqr (MAX (trap->stats.dam, trap->inv ? trap->inv->level : 1))
432	/ skill->level;
433
434	if (!(random_roll (0, (MAX (2, MIN (20, trap->level - skill->level + 5 - disarmer->stats.Dex / 2)) - 1), disarmer, PREFER_LOW)))
435	{
436	new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You successfully disarm the %s!", &trap->name);
437	trap->destroy ();
438
439	/* If it is your own trap, (or any players trap), don't you don't
440	* get exp for it.
441	*/
442	if (trap->owner && trap->owner->type != PLAYER && risk)
443	return trapworth;
444	else
445	return 1; /* give minimal exp and say success */
446	}
447	else
448	{
449	new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You fail to disarm the %s.", &trap->name);
450	if (!(random_roll (0, (MAX (2, skill->level - trap->level + disarmer->stats.Dex / 2 - 6)) - 1, disarmer, PREFER_LOW)) && risk)
451	{
452	new_draw_info (NDI_UNIQUE, 0, disarmer, "In fact, you set it off!");
453	spring_trap (trap, disarmer);
454	}
455	return 0;
456	}
457	}
458
459	/* traps need to be adjusted for the difficulty of the map. The
460	* default traps are too strong for wimpy level 1 players, and
461	* unthreatening to anyone of high level
462	*/
463	void
464	trap_adjust (object *trap, int difficulty)
465	{
466	int i;
467
468	/* now we set the trap level to match the difficulty of the level
469	* the formula below will give a level from 1 to (2*difficulty) with
470	* a peak probability at difficulty
471	*/
472
473	trap->level = rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
474	if (trap->level < 1)
475	trap->level = 1;
476
477	/* set the hiddenness of the trap, similar formula to above */
478	trap->stats.Cha = rndm (0, 19) + rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
479
480	if (!trap->other_arch && !trap->inv)
481	{
482	/* set the damage of the trap.
483	* we get 0-4 pts of damage per level of difficulty of the map in
484	* the trap
485	*/
486
487	trap->stats.dam = 0;
488	for (i = 0; i < difficulty; i++)
489	trap->stats.dam += rndm (0, 4);
490
491	/* the poison trap special case */
492	if (trap->attacktype & AT_POISON)
493	{
494	trap->stats.dam = rndm (0, difficulty - 1);
495	if (trap->stats.dam < 1)
496	trap->stats.dam = 1;
497	}
498
499	/* so we get an appropriate amnt of exp for AT_DEATH traps */
500	if (trap->attacktype & AT_DEATH)
501	trap->stats.dam = 127;
502	}
503
504	}