server/server/rune.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 *
 * Copyright (©) 2018 Marc Alexander Lehmann / the Deliantra team
 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 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;

  if (!dir)
    dir = 1;

  mapxy pos (op);
  pos.move (dir);

  if (!pos.normalise () || pos.ms ().flags () & (P_SAFE | P_NO_MAGIC | P_NO_CLERIC))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Your rune doesn't stick! H<You cannot place a rune on safe ground or outside the map.>");
      return 0;
    }

  if (pos->blocks (op))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You cannot reach there! H<You cannot place a rune where you can't go.>");
      return 0;
    }

  for (tmp = pos->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 = archetype::get (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);

  pos.insert (rune, 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 (0, 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 (trap->flag [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 (!victim->flag [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 */
      trap->set_flag (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 + DIRX (dir);
  y = op->y + DIRY (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 = 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 = archetype::get (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:	1.59
Committed:	Wed Nov 14 20:34:58 2018 UTC (5 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.58:	+13 -9 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	*
4	* Copyright (©) 2018 Marc Alexander Lehmann / the Deliantra team
5	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
6	* Copyright (©) 2003 Mark Wedel & Crossfire Development Team
7	* Copyright (©) 1992 Frank Tore Johansen
8	*
9	* Deliantra is free software: you can redistribute it and/or modify it under
10	* the terms of the Affero GNU General Public License as published by the
11	* Free Software Foundation, either version 3 of the License, or (at your
12	* option) any later version.
13	*
14	* This program is distributed in the hope that it will be useful,
15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17	* GNU General Public License for more details.
18	*
19	* You should have received a copy of the Affero GNU General Public License
20	* and the GNU General Public License along with this program. If not, see
21	* <http://www.gnu.org/licenses/>.
22	*
23	* The authors can be reached via e-mail to <support@deliantra.net>
24	*/
25
26	#include <global.h>
27	#include <sproto.h>
28	#include <spells.h>
29
30	#ifndef sqr
31	# define sqr(x) ((x)*(x))
32	#endif
33
34	/* peterm:
35	* write_rune:
36	* op: rune writer
37	* skop: skill object used for casting this rune
38	* dir: orientation of rune, direction rune's contained spell will
39	* be cast in, if applicable
40	* spell: spell object to put into the rune
41	* level: level of casting of the rune
42	* runename: name of the rune or message displayed by the rune for
43	* a rune of marking
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
50	if (!dir)
51	dir = 1;
52
53	mapxy pos (op);
54	pos.move (dir);
55
56	if (!pos.normalise () \|\| pos.ms ().flags () & (P_SAFE \| P_NO_MAGIC \| P_NO_CLERIC))
57	{
58	new_draw_info (NDI_UNIQUE, 0, op, "Your rune doesn't stick! H<You cannot place a rune on safe ground or outside the map.>");
59	return 0;
60	}
61
62	if (pos->blocks (op))
63	{
64	new_draw_info (NDI_UNIQUE, 0, op, "You cannot reach there! H<You cannot place a rune where you can't go.>");
65	return 0;
66	}
67
68	for (tmp = pos->bot; tmp; tmp = tmp->above)
69	if (tmp->type == RUNE)
70	break;
71
72	if (tmp)
73	{
74	new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune on top of another rune.");
75	return 0;
76	}
77
78	if (spell->other_arch)
79	rune_spell = spell->other_arch->instance ();
80	else
81	{
82	/* Player specified spell. The player has to know the spell, so
83	* lets just look through the players inventory see if they know it
84	* use the item_matched_string for our typical matching method.
85	*/
86	int bestmatch = 0, ms;
87
88	if (!runename \|\| *runename == 0)
89	{
90	new_draw_info (NDI_UNIQUE, 0, op, "Write a rune of what?");
91	return 0;
92	}
93
94	rune_spell = NULL;
95	for (tmp = op->inv; tmp; tmp = tmp->below)
96	if (tmp->type == SPELL)
97	{
98	ms = item_matched_string (op, tmp, runename);
99	if (ms > bestmatch)
100	{
101	bestmatch = ms;
102	rune_spell = tmp;
103	}
104	}
105
106	if (!rune_spell)
107	{
108	new_draw_info_format (NDI_UNIQUE, 0, op, "You don't know any spell named %s.", runename);
109	return 0;
110	}
111
112	if (rune_spell->skill != spell->skill)
113	{
114	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);
115	return 0;
116	}
117
118	if (caster->path_denied & spell->path_attuned && !caster->flag [FLAG_WIZCAST])
119	{
120	new_draw_info_format (NDI_UNIQUE, 0, op, "%s belongs to a spell path denied to you.", &rune_spell->name);
121	return 0;
122	}
123
124	if (casting_level (caster, rune_spell) < rune_spell->level && !caster->flag [FLAG_WIZCAST])
125	{
126	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);
127	return 0;
128	}
129
130	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA) > op->stats.sp)
131	{
132	new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough mana.");
133	return 0;
134	}
135
136	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE) > op->stats.grace)
137	{
138	new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough grace.");
139	return 0;
140	}
141
142	op->stats.grace -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE);
143	op->stats.sp -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA);
144	}
145
146	/* already proper rune. Note this should only be the case if other_arch was set */
147	if (rune_spell->type == RUNE)
148	rune = rune_spell;
149	else
150	{
151	rune = archetype::get (GENERIC_RUNE);
152	rune->msg = format ("You set off a rune of %s\n", &rune_spell->name);
153	rune->insert (rune_spell->clone ());
154
155	if (spell->face != blank_face)
156	rune->face = spell->face;
157	}
158
159	rune->level = casting_level (caster, spell);
160	rune->stats.Cha = rune->level / 2; /* the invisibility parameter */
161	rune->direction = dir; /* where any spell will go upon detonation */
162	rune->set_owner (op); /* runes without need no owner */
163	set_spell_skill (op, caster, spell, rune);
164
165	pos.insert (rune, op);
166	return 1;
167	}
168
169	/* move_rune: peterm
170	comments on runes:
171	rune->level : level at which rune will cast its spell.
172	rune->hp : number of detonations before rune goes away
173	rune->msg : message the rune displays when it goes off
174	rune->direction : direction it will cast a spell in
175	rune->dam : damage the rune will do if it doesn't cast spells
176	rune->attacktype: type of damage it does, if not casting spells
177	rune->other_arch: spell in the rune
178	rune->Cha : how hidden the rune is
179	rune->maxhp : number of spells the rune casts
180	*/
181	void
182	move_rune (object *op)
183	{
184	/* runes of level zero cannot detonate. */
185	if (!op->level)
186	return;
187
188	int det = op->invisible;
189
190	if (!(rndm (0, max (0, op->stats.Cha - 1))))
191	{
192	op->invisible = 0;
193	op->speed_left -= 1;
194	}
195	else
196	op->invisible = 1;
197
198	if (op->invisible != det)
199	update_object (op, UP_OBJ_CHANGE);
200	}
201
202	/* peterm: rune_attack
203	* function handles those runes which detonate but do not cast spells.
204	*/
205	static void
206	rune_attack (object op, object victim)
207	{
208	if (victim)
209	{
210	hit_player (victim, op->stats.dam, op, op->attacktype, 1);
211
212	if (victim->destroyed ())
213	return;
214
215	/* if there's a disease in the needle, put it in the player */
216	if (op->has_random_items ())
217	create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);
218
219	if (op->inv && op->inv->type == DISEASE)
220	{
221	object *disease = op->inv;
222
223	infect_object (victim, disease, 1);
224	disease->destroy ();
225	}
226	}
227	else
228	hit_map (op, 0, op->attacktype, 1);
229	}
230
231	/* This function generalizes attacks by runes/traps. This ought to make
232	* it possible for runes to attack from the inventory,
233	* it'll spring the trap on the victim.
234	*/
235	void
236	spring_trap (object trap, object victim)
237	{
238	object *env;
239	rv_vector rv;
240	int i;
241
242	/* Prevent recursion */
243	if (trap->stats.hp <= 0)
244	return;
245
246	if (trap->flag [FLAG_IS_LINKED])
247	use_trigger (trap, victim);
248
249	/* Only living objects can trigger runes that don't cast spells, as
250	* doing direct damage to a non-living object doesn't work anyway.
251	* Typical example is an arrow attacking a door.
252	*/
253	if (!victim->flag [FLAG_ALIVE] && !trap->inv && !trap->other_arch)
254	return;
255
256	trap->stats.hp--; /decrement detcount /
257
258	if (victim && victim->type == PLAYER)
259	new_draw_info (NDI_UNIQUE, 0, victim, trap->msg);
260
261	/* Flash an image of the trap on the map so the poor sod
262	* knows what hit him.
263	*/
264	env = trap->outer_env_or_self ();
265
266	/* If the victim is not next to this trap, don't set it off.
267	* players shouldn't get hit by firing arrows at a door for example.
268	* At the same time, the trap will stick around until detonated
269	*/
270	get_rangevector (env, victim, &rv, 0);
271	if (rv.distance > 1)
272	return;
273
274	env->play_sound (trap->sound ? trap->sound : sound_find ("trap_spring"));
275
276	trap_show (trap, env);
277
278	if (victim->type == PLAYER) // only count players as enemies
279	trap->enemy = victim; // set the victim as the traps enemy, so that summoned
280	// creatures know who to attack.
281
282	/* Only if it is a spell do we proceed here */
283	if ((trap->inv && trap->inv->type == SPELL) \|\| (trap->other_arch && trap->other_arch->type == SPELL))
284	{
285	if (trap->destroyed ())
286	return;
287
288	// breaks summon golem spells, which, for inexplicable reasons,
289	// do not work like summon golem spells at all but still require
290	// direction "0" to work at all.
291	//if (trap->direction)
292	// rv.direction = trap->direction;
293
294	for (i = 0; i < max (1, trap->stats.maxhp); i++)
295	{
296	if (trap->inv)
297	cast_spell (env, trap, trap->direction, trap->inv, NULL);
298	else
299	{
300	object *spell = trap->other_arch->instance ();
301
302	cast_spell (env, trap, trap->direction, spell, NULL);
303	spell->destroy ();
304	}
305	}
306	}
307	else
308	{
309	rune_attack (trap, victim);
310	if (trap->destroyed ())
311	return;
312	}
313
314	if (trap->stats.hp <= 0)
315	{
316	trap->type = SIGN; /* make the trap impotent */
317	trap->stats.food = 20; /* make it stick around until its spells are gone */
318	trap->set_flag (FLAG_IS_USED_UP);
319	}
320	}
321
322	/* dispel_rune: by peterm
323	* dispels the target rune, depending on the level of the actor
324	* and the level of the rune risk flag, if true, means that there is
325	* a chance that the trap/rune will detonate
326	*/
327	int
328	dispel_rune (object op, object caster, object spell, object skill, int dir)
329	{
330	object tmp, tmp2;
331	int searchflag = 1, mflags;
332	sint16 x, y;
333	maptile *m;
334
335	x = op->x + DIRX (dir);
336	y = op->y + DIRY (dir);
337	m = op->map;
338
339	mflags = get_map_flags (m, &m, x, y, &x, &y);
340
341	/* Should we perhaps not allow player to disable traps if a monster/
342	* player is standing on top?
343	*/
344	if (mflags & P_OUT_OF_MAP)
345	{
346	new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
347	return 0;
348	}
349
350	for (tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
351	{
352	if (tmp->type == RUNE \|\| tmp->type == TRAP)
353	break;
354
355	/* we could put a probability chance here, but since nothing happens
356	* if you fail, no point on that. I suppose we could do a level
357	* comparison so low level players can't erase high level players runes.
358	*/
359	if (tmp->type == SIGN && tmp->arch->archname == shstr_rune_mark)
360	{
361	tmp->destroy ();
362	new_draw_info (NDI_UNIQUE, 0, op, "You wipe out the rune of marking!");
363	return 1;
364	}
365
366	/* now search tmp's inventory for traps
367	* This is for chests, where the rune is in the chests inventory.
368	*/
369	for (tmp2 = tmp->inv; tmp2; tmp2 = tmp2->below)
370	{
371	if (tmp2->type == RUNE \|\| tmp2->type == TRAP)
372	{
373	tmp = tmp2;
374	searchflag = 0;
375	break;
376	}
377	}
378
379	if (!searchflag)
380	break;
381	}
382
383	/* no rune there. */
384	if (tmp == NULL)
385	{
386	new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
387	return 0;
388	}
389
390	trap_disarm (op, tmp, 0, skill);
391	return 1;
392	}
393
394	int
395	trap_see (object op, object trap)
396	{
397	int 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 = archetype::get (shstr_runedet);
417	tmp->face = trap->get_anim_frame (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	}