server/server/rune.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 *
 * 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;
  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 = 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);

  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 (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 + 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 = 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:	1.56
Committed:	Wed Nov 16 23:42:03 2016 UTC (7 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.55:	+1 -1 lines
Log Message:	copyright update 2016
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.30	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	root	1.55	*
4	root	1.56	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.47	* Copyright (©) 2003 Mark Wedel & Crossfire Development Team
6			* Copyright (©) 1992 Frank Tore Johansen
7	root	1.55	*
8	root	1.43	* 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	root	1.55	*
13	root	1.28	* 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	root	1.55	*
18	root	1.43	* 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	root	1.55	*
22	root	1.30	* The authors can be reached via e-mail to <support@deliantra.net>
23	pippijn	1.17	*/
24	elmex	1.1
25			#include <global.h>
26	root	1.14	#include <sproto.h>
27	elmex	1.1	#include <spells.h>
28
29			#ifndef sqr
30	root	1.4	# define sqr(x) ((x)*(x))
31	elmex	1.1	#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	root	1.39	* spell: spell object to put into the rune
40	elmex	1.1	* 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	root	1.4	int
45			write_rune (object op, object caster, object spell, int dir, const char runename)
46			{
47			object tmp, rune_spell, *rune;
48	root	1.7	maptile *m;
49	root	1.4	sint16 nx, ny;
50
51			if (!dir)
52	root	1.10	dir = 1;
53	root	1.4
54			nx = op->x + freearr_x[dir];
55			ny = op->y + freearr_y[dir];
56			m = op->map;
57
58	root	1.20	if (get_map_flags (m, &m, nx, ny, &nx, &ny) & (P_OUT_OF_MAP \| P_SAFE \| P_NO_MAGIC \| P_NO_CLERIC))
59	root	1.4	{
60			new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
61			return 0;
62	elmex	1.1	}
63	root	1.10
64	root	1.19	for (tmp = m->at (nx, ny).bot; tmp; tmp = tmp->above)
65	root	1.4	if (tmp->type == RUNE)
66			break;
67
68			if (tmp)
69			{
70	root	1.20	new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune on top of another rune.");
71	elmex	1.1	return 0;
72			}
73
74	root	1.4	if (spell->other_arch)
75	root	1.46	rune_spell = spell->other_arch->instance ();
76	root	1.4	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	root	1.20	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	root	1.10
102	root	1.4	if (!rune_spell)
103			{
104	root	1.37	new_draw_info_format (NDI_UNIQUE, 0, op, "You don't know any spell named %s.", runename);
105	root	1.4	return 0;
106			}
107	root	1.10
108	root	1.4	if (rune_spell->skill != spell->skill)
109			{
110	root	1.37	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	root	1.4	return 0;
112			}
113	root	1.10
114	root	1.20	if (caster->path_denied & spell->path_attuned && !caster->flag [FLAG_WIZCAST])
115	root	1.4	{
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	root	1.10
120	root	1.34	if (casting_level (caster, rune_spell) < rune_spell->level && !caster->flag [FLAG_WIZCAST])
121	root	1.4	{
122	root	1.37	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	root	1.4	return 0;
124			}
125	root	1.10
126	root	1.4	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	root	1.10
132	root	1.4	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	root	1.10
138	root	1.4	op->stats.grace -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE);
139	root	1.39	op->stats.sp -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA);
140	root	1.4	}
141	root	1.10
142	root	1.4	/* already proper rune. Note this should only be the case if other_arch was set */
143			if (rune_spell->type == RUNE)
144	root	1.15	rune = rune_spell;
145	root	1.4	else
146			{
147	root	1.52	rune = archetype::get (GENERIC_RUNE);
148	root	1.39	rune->msg = format ("You set off a rune of %s\n", &rune_spell->name);
149	root	1.15	rune->insert (rune_spell->clone ());
150	root	1.10
151	root	1.4	if (spell->face != blank_face)
152			rune->face = spell->face;
153			}
154	root	1.10
155	root	1.34	rune->level = casting_level (caster, spell);
156	root	1.4	rune->stats.Cha = rune->level / 2; /* the invisibility parameter */
157			rune->direction = dir; /* where any spell will go upon detonation */
158	root	1.11	rune->set_owner (op); /* runes without need no owner */
159	root	1.4	set_spell_skill (op, caster, spell, rune);
160	root	1.15
161			m->insert (rune, nx, ny, op);
162	root	1.4	return 1;
163	elmex	1.1	}
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	root	1.4	void
178			move_rune (object *op)
179			{
180	root	1.18	/* runes of level zero cannot detonate. */
181			if (!op->level)
182			return;
183
184			int det = op->invisible;
185	root	1.4
186	root	1.53	if (!(rndm (0, max (0, op->stats.Cha - 1))))
187	root	1.4	{
188			op->invisible = 0;
189			op->speed_left -= 1;
190			}
191			else
192			op->invisible = 1;
193	root	1.18
194	root	1.4	if (op->invisible != det)
195	root	1.22	update_object (op, UP_OBJ_CHANGE);
196	elmex	1.1	}
197
198			/* peterm: rune_attack
199			* function handles those runes which detonate but do not cast spells.
200			*/
201	root	1.44	static void
202	root	1.4	rune_attack (object op, object victim)
203	elmex	1.1	{
204	root	1.4	if (victim)
205			{
206	root	1.6	hit_player (victim, op->stats.dam, op, op->attacktype, 1);
207	root	1.4
208	root	1.6	if (victim->destroyed ())
209	root	1.4	return;
210	root	1.6
211	root	1.4	/* if there's a disease in the needle, put it in the player */
212	root	1.12	if (op->has_random_items ())
213	root	1.4	create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);
214	root	1.6
215	root	1.4	if (op->inv && op->inv->type == DISEASE)
216			{
217			object *disease = op->inv;
218
219			infect_object (victim, disease, 1);
220	root	1.36	disease->destroy ();
221	root	1.4	}
222	elmex	1.1	}
223	root	1.4	else
224			hit_map (op, 0, op->attacktype, 1);
225	elmex	1.1	}
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	root	1.4	void
232			spring_trap (object trap, object victim)
233	elmex	1.1	{
234	root	1.4	object *env;
235			rv_vector rv;
236			int i;
237
238			/* Prevent recursion */
239			if (trap->stats.hp <= 0)
240			return;
241
242	root	1.49	if (trap->flag [FLAG_IS_LINKED])
243	root	1.40	use_trigger (trap, victim);
244	root	1.4
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	root	1.49	if (!victim->flag [FLAG_ALIVE] && !trap->inv && !trap->other_arch)
250	root	1.4	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	root	1.42	env = trap->outer_env_or_self ();
261	root	1.4
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	root	1.29	env->play_sound (trap->sound ? trap->sound : sound_find ("trap_spring"));
271
272	root	1.4	trap_show (trap, env);
273
274	elmex	1.23	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	root	1.4	/* Only if it is a spell do we proceed here */
279	root	1.27	if ((trap->inv && trap->inv->type == SPELL) \|\| (trap->other_arch && trap->other_arch->type == SPELL))
280	root	1.4	{
281	root	1.6	if (trap->destroyed ())
282	root	1.2	return;
283	elmex	1.1
284	root	1.4	// 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	elmex	1.1
290	root	1.45	for (i = 0; i < max (1, trap->stats.maxhp); i++)
291	root	1.4	{
292			if (trap->inv)
293			cast_spell (env, trap, trap->direction, trap->inv, NULL);
294			else
295			{
296	root	1.46	object *spell = trap->other_arch->instance ();
297	elmex	1.1
298	root	1.4	cast_spell (env, trap, trap->direction, spell, NULL);
299	root	1.36	spell->destroy ();
300	root	1.2	}
301			}
302	root	1.4	}
303			else
304			{
305			rune_attack (trap, victim);
306	root	1.6	if (trap->destroyed ())
307	root	1.4	return;
308	elmex	1.1	}
309
310	root	1.4	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	root	1.49	trap->set_flag (FLAG_IS_USED_UP);
315	elmex	1.1	}
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	root	1.4	int
324			dispel_rune (object op, object caster, object spell, object skill, int dir)
325	elmex	1.1	{
326	root	1.4	object tmp, tmp2;
327			int searchflag = 1, mflags;
328			sint16 x, y;
329	root	1.7	maptile *m;
330	root	1.4
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	root	1.39	for (tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
347	root	1.4	{
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	root	1.38	if (tmp->type == SIGN && tmp->arch->archname == shstr_rune_mark)
356	root	1.4	{
357	root	1.36	tmp->destroy ();
358	root	1.4	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	root	1.39	for (tmp2 = tmp->inv; tmp2; tmp2 = tmp2->below)
366	root	1.4	{
367			if (tmp2->type == RUNE \|\| tmp2->type == TRAP)
368			{
369			tmp = tmp2;
370			searchflag = 0;
371			break;
372	root	1.2	}
373			}
374	root	1.39
375	root	1.4	if (!searchflag)
376			break;
377	elmex	1.1	}
378	root	1.4
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	root	1.32
386	root	1.4	trap_disarm (op, tmp, 0, skill);
387			return 1;
388	elmex	1.1	}
389
390	root	1.4	int
391			trap_see (object op, object trap)
392			{
393	root	1.50	int chance = random_roll (0, 99, op, PREFER_HIGH);
394	elmex	1.1
395	root	1.4	/* decide if we see the rune or not */
396	root	1.45	if ((trap->stats.Cha == 1) \|\| (chance > min (95, max (5, ((int) ((float) (op->map->difficulty
397	root	1.4	+ trap->level + trap->stats.Cha - op->level) / 10.0 * 50.0))))))
398			{
399			new_draw_info_format (NDI_UNIQUE, 0, op, "You spot a %s!", &trap->name);
400			return 1;
401	elmex	1.1	}
402	root	1.32
403	root	1.4	return 0;
404	elmex	1.1	}
405
406	root	1.4	int
407			trap_show (object trap, object where)
408			{
409			if (where == NULL)
410			return 0;
411	root	1.15
412	root	1.52	object *tmp = archetype::get (shstr_runedet);
413	root	1.41	tmp->face = trap->get_anim_frame (0);
414	root	1.15	tmp->insert_at (where, 0);
415
416	root	1.4	return 1;
417	elmex	1.1	}
418
419	root	1.4	int
420			trap_disarm (object disarmer, object trap, int risk, object *skill)
421			{
422	root	1.32	int trapworth; /* need to compute the experience worth of the trap before we kill it */
423	root	1.4
424			/* this formula awards a more reasonable amount of exp */
425	root	1.45	trapworth = max (1, trap->level)
426	root	1.32	* disarmer->map->difficulty
427	root	1.45	* sqr (max (trap->stats.dam, trap->inv ? trap->inv->level : 1))
428	root	1.32	/ skill->level;
429	root	1.4
430	root	1.45	if (!(random_roll (0, (max (2, min (20, trap->level - skill->level + 5 - disarmer->stats.Dex / 2)) - 1), disarmer, PREFER_LOW)))
431	root	1.4	{
432			new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You successfully disarm the %s!", &trap->name);
433	root	1.36	trap->destroy ();
434	root	1.9
435	root	1.4	/* If it is your own trap, (or any players trap), don't you don't
436			* get exp for it.
437			*/
438			if (trap->owner && trap->owner->type != PLAYER && risk)
439			return trapworth;
440			else
441			return 1; /* give minimal exp and say success */
442			}
443			else
444			{
445			new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You fail to disarm the %s.", &trap->name);
446	root	1.45	if (!(random_roll (0, (max (2, skill->level - trap->level + disarmer->stats.Dex / 2 - 6)) - 1, disarmer, PREFER_LOW)) && risk)
447	root	1.4	{
448			new_draw_info (NDI_UNIQUE, 0, disarmer, "In fact, you set it off!");
449			spring_trap (trap, disarmer);
450	elmex	1.1	}
451	root	1.4	return 0;
452			}
453	elmex	1.1	}
454
455			/* traps need to be adjusted for the difficulty of the map. The
456			* default traps are too strong for wimpy level 1 players, and
457			* unthreatening to anyone of high level
458			*/
459	root	1.4	void
460			trap_adjust (object *trap, int difficulty)
461			{
462			int i;
463	elmex	1.1
464	root	1.4	/* now we set the trap level to match the difficulty of the level
465			* the formula below will give a level from 1 to (2*difficulty) with
466			* a peak probability at difficulty
467			*/
468
469			trap->level = rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
470			if (trap->level < 1)
471			trap->level = 1;
472
473			/* set the hiddenness of the trap, similar formula to above */
474			trap->stats.Cha = rndm (0, 19) + rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
475
476			if (!trap->other_arch && !trap->inv)
477			{
478			/* set the damage of the trap.
479			* we get 0-4 pts of damage per level of difficulty of the map in
480			* the trap
481			*/
482
483			trap->stats.dam = 0;
484			for (i = 0; i < difficulty; i++)
485			trap->stats.dam += rndm (0, 4);
486
487			/* the poison trap special case */
488			if (trap->attacktype & AT_POISON)
489			{
490			trap->stats.dam = rndm (0, difficulty - 1);
491			if (trap->stats.dam < 1)
492			trap->stats.dam = 1;
493	root	1.2	}
494	elmex	1.1
495	root	1.4	/* so we get an appropriate amnt of exp for AT_DEATH traps */
496			if (trap->attacktype & AT_DEATH)
497			trap->stats.dam = 127;
498	elmex	1.1	}
499
500			}