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", &rune_spell->name, &spell->name);
          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 (caster_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!", &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 = caster_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 (1);

      /* 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:	1.33
Committed:	Tue May 6 16:55:26 2008 UTC (16 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_6, rel-2_7, rel-2_71, rel-2_54, rel-2_55, rel-2_56, rel-2_61
Changes since 1.32:	+1 -1 lines
Log Message:	update copyright
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.30	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	pippijn	1.17	*
4	root	1.33	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.25	* Copyright (©) 2003,2007 Mark Wedel & Crossfire Development Team
6			* Copyright (©) 1992,2007 Frank Tore Johansen
7	pippijn	1.17	*
8	root	1.30	* Deliantra is free software: you can redistribute it and/or modify
9	root	1.28	* 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	pippijn	1.17	*
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	pippijn	1.17	*
18	root	1.28	* 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	root	1.25	*
21	root	1.30	* The authors can be reached via e-mail to <support@deliantra.net>
22	pippijn	1.17	*/
23	elmex	1.1
24			#include <global.h>
25	root	1.14	#include <sproto.h>
26	elmex	1.1	#include <spells.h>
27
28			#ifndef sqr
29	root	1.4	# define sqr(x) ((x)*(x))
30	elmex	1.1	#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	root	1.4	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	root	1.7	maptile *m;
51	root	1.4	sint16 nx, ny;
52
53			if (!dir)
54	root	1.10	dir = 1;
55	root	1.4
56			nx = op->x + freearr_x[dir];
57			ny = op->y + freearr_y[dir];
58			m = op->map;
59
60	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))
61	root	1.4	{
62			new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
63			return 0;
64	elmex	1.1	}
65	root	1.10
66	root	1.19	for (tmp = m->at (nx, ny).bot; tmp; tmp = tmp->above)
67	root	1.4	if (tmp->type == RUNE)
68			break;
69
70			if (tmp)
71			{
72	root	1.20	new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune on top of another rune.");
73	elmex	1.1	return 0;
74			}
75
76	root	1.4	if (spell->other_arch)
77	root	1.10	rune_spell = arch_to_object (spell->other_arch);
78	root	1.4	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	root	1.20	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	root	1.10
104	root	1.4	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	root	1.10
110	root	1.4	if (rune_spell->skill != spell->skill)
111			{
112			new_draw_info_format (NDI_UNIQUE, 0, op, "You can't cast %s with %s", &rune_spell->name, &spell->name);
113			return 0;
114			}
115	root	1.10
116	root	1.20	if (caster->path_denied & spell->path_attuned && !caster->flag [FLAG_WIZCAST])
117	root	1.4	{
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	root	1.10
122	root	1.20	if (caster_level (caster, rune_spell) < rune_spell->level && !caster->flag [FLAG_WIZCAST])
123	root	1.4	{
124			new_draw_info_format (NDI_UNIQUE, 0, op, "%s is beyond your ability to cast!", &rune_spell->name);
125			return 0;
126			}
127	root	1.10
128	root	1.4	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	root	1.10
134	root	1.4	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	root	1.10
140	root	1.4	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	root	1.10
144	root	1.4	/* already proper rune. Note this should only be the case if other_arch was set */
145			if (rune_spell->type == RUNE)
146	root	1.15	rune = rune_spell;
147	root	1.4	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	root	1.15	rune->insert (rune_spell->clone ());
153	root	1.10
154	root	1.4	if (spell->face != blank_face)
155			rune->face = spell->face;
156			}
157	root	1.10
158	root	1.4	rune->level = caster_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	root	1.11	rune->set_owner (op); /* runes without need no owner */
162	root	1.4	set_spell_skill (op, caster, spell, rune);
163	root	1.15
164			m->insert (rune, nx, ny, op);
165	root	1.4	return 1;
166	elmex	1.1	}
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	root	1.4	void
181			move_rune (object *op)
182			{
183	root	1.18	/* runes of level zero cannot detonate. */
184			if (!op->level)
185			return;
186
187			int det = op->invisible;
188	root	1.4
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	root	1.18
197	root	1.4	if (op->invisible != det)
198	root	1.22	update_object (op, UP_OBJ_CHANGE);
199	elmex	1.1	}
200
201			/* peterm: rune_attack
202			* function handles those runes which detonate but do not cast spells.
203			*/
204	root	1.4	void
205			rune_attack (object op, object victim)
206	elmex	1.1	{
207	root	1.4	if (victim)
208			{
209	root	1.6	hit_player (victim, op->stats.dam, op, op->attacktype, 1);
210	root	1.4
211	root	1.6	if (victim->destroyed ())
212	root	1.4	return;
213	root	1.6
214	root	1.4	/* if there's a disease in the needle, put it in the player */
215	root	1.12	if (op->has_random_items ())
216	root	1.4	create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);
217	root	1.6
218	root	1.4	if (op->inv && op->inv->type == DISEASE)
219			{
220			object *disease = op->inv;
221
222			infect_object (victim, disease, 1);
223	root	1.9	disease->destroy ();
224	root	1.4	}
225	elmex	1.1	}
226	root	1.4	else
227			hit_map (op, 0, op->attacktype, 1);
228	elmex	1.1	}
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	root	1.4	void
235			spring_trap (object trap, object victim)
236	elmex	1.1	{
237	root	1.4	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	root	1.31	env = trap->outer_env ();
264	root	1.4
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	root	1.29	env->play_sound (trap->sound ? trap->sound : sound_find ("trap_spring"));
274
275	root	1.4	trap_show (trap, env);
276
277	elmex	1.23	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	root	1.4	/* Only if it is a spell do we proceed here */
282	root	1.27	if ((trap->inv && trap->inv->type == SPELL) \|\| (trap->other_arch && trap->other_arch->type == SPELL))
283	root	1.4	{
284	elmex	1.1
285	root	1.6	if (trap->destroyed ())
286	root	1.2	return;
287	elmex	1.1
288	root	1.4	// 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	elmex	1.1
294	root	1.4	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 = arch_to_object (trap->other_arch);
301	elmex	1.1
302	root	1.4	cast_spell (env, trap, trap->direction, spell, NULL);
303	root	1.9	spell->destroy ();
304	root	1.2	}
305			}
306	root	1.4	}
307			else
308			{
309			rune_attack (trap, victim);
310	root	1.6	if (trap->destroyed ())
311	root	1.4	return;
312	elmex	1.1	}
313
314	root	1.4	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			SET_FLAG (trap, FLAG_IS_USED_UP);
319	elmex	1.1	}
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	root	1.4	int
328			dispel_rune (object op, object caster, object spell, object skill, int dir)
329	elmex	1.1	{
330	root	1.4	object tmp, tmp2;
331			int searchflag = 1, mflags;
332			sint16 x, y;
333	root	1.7	maptile *m;
334	root	1.4
335			x = op->x + freearr_x[dir];
336			y = op->y + freearr_y[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	root	1.13	for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above)
351	root	1.4	{
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	root	1.26	if (tmp->type == SIGN && !strcmp (tmp->arch->archname, "rune_mark"))
360	root	1.4	{
361	root	1.9	tmp->destroy ();
362	root	1.4	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 != NULL; tmp2 = tmp2->below)
370			{
371			if (tmp2->type == RUNE \|\| tmp2->type == TRAP)
372			{
373			tmp = tmp2;
374			searchflag = 0;
375			break;
376	root	1.2	}
377			}
378	root	1.4	if (!searchflag)
379			break;
380	elmex	1.1	}
381	root	1.4
382			/* no rune there. */
383			if (tmp == NULL)
384			{
385			new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
386			return 0;
387			}
388	root	1.32
389	root	1.4	trap_disarm (op, tmp, 0, skill);
390			return 1;
391	elmex	1.1	}
392
393	root	1.4	int
394			trap_see (object op, object trap)
395			{
396			int chance;
397
398			chance = random_roll (0, 99, op, PREFER_HIGH);;
399	elmex	1.1
400	root	1.4	/* decide if we see the rune or not */
401			if ((trap->stats.Cha == 1) \|\| (chance > MIN (95, MAX (5, ((int) ((float) (op->map->difficulty
402			+ trap->level + trap->stats.Cha - op->level) / 10.0 * 50.0))))))
403			{
404			new_draw_info_format (NDI_UNIQUE, 0, op, "You spot a %s!", &trap->name);
405			return 1;
406	elmex	1.1	}
407	root	1.32
408	root	1.4	return 0;
409	elmex	1.1	}
410
411	root	1.4	int
412			trap_show (object trap, object where)
413			{
414			if (where == NULL)
415			return 0;
416	root	1.15
417			object *tmp = get_archetype ("runedet");
418	root	1.21	tmp->face = GET_ANIMATION (trap, 0);
419	root	1.15	tmp->insert_at (where, 0);
420
421	root	1.4	return 1;
422	elmex	1.1	}
423
424	root	1.4	int
425			trap_disarm (object disarmer, object trap, int risk, object *skill)
426			{
427	root	1.32	int trapworth; /* need to compute the experience worth of the trap before we kill it */
428	root	1.4
429			/* this formula awards a more reasonable amount of exp */
430	root	1.32	trapworth = MAX (1, trap->level)
431			* disarmer->map->difficulty
432			* sqr (MAX (trap->stats.dam, trap->inv ? trap->inv->level : 1))
433			/ skill->level;
434	root	1.4
435			if (!(random_roll (0, (MAX (2, MIN (20, trap->level - skill->level + 5 - disarmer->stats.Dex / 2)) - 1), disarmer, PREFER_LOW)))
436			{
437			new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You successfully disarm the %s!", &trap->name);
438	root	1.9	trap->destroy (1);
439
440	root	1.4	/* If it is your own trap, (or any players trap), don't you don't
441			* get exp for it.
442			*/
443			if (trap->owner && trap->owner->type != PLAYER && risk)
444			return trapworth;
445			else
446			return 1; /* give minimal exp and say success */
447			}
448			else
449			{
450			new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You fail to disarm the %s.", &trap->name);
451			if (!(random_roll (0, (MAX (2, skill->level - trap->level + disarmer->stats.Dex / 2 - 6)) - 1, disarmer, PREFER_LOW)) && risk)
452			{
453			new_draw_info (NDI_UNIQUE, 0, disarmer, "In fact, you set it off!");
454			spring_trap (trap, disarmer);
455	elmex	1.1	}
456	root	1.4	return 0;
457			}
458	elmex	1.1	}
459
460			/* traps need to be adjusted for the difficulty of the map. The
461			* default traps are too strong for wimpy level 1 players, and
462			* unthreatening to anyone of high level
463			*/
464	root	1.4	void
465			trap_adjust (object *trap, int difficulty)
466			{
467			int i;
468	elmex	1.1
469	root	1.4	/* now we set the trap level to match the difficulty of the level
470			* the formula below will give a level from 1 to (2*difficulty) with
471			* a peak probability at difficulty
472			*/
473
474			trap->level = rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
475			if (trap->level < 1)
476			trap->level = 1;
477
478			/* set the hiddenness of the trap, similar formula to above */
479			trap->stats.Cha = rndm (0, 19) + rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
480
481			if (!trap->other_arch && !trap->inv)
482			{
483			/* set the damage of the trap.
484			* we get 0-4 pts of damage per level of difficulty of the map in
485			* the trap
486			*/
487
488			trap->stats.dam = 0;
489			for (i = 0; i < difficulty; i++)
490			trap->stats.dam += rndm (0, 4);
491
492			/* the poison trap special case */
493			if (trap->attacktype & AT_POISON)
494			{
495			trap->stats.dam = rndm (0, difficulty - 1);
496			if (trap->stats.dam < 1)
497			trap->stats.dam = 1;
498	root	1.2	}
499	elmex	1.1
500	root	1.4	/* so we get an appropriate amnt of exp for AT_DEATH traps */
501			if (trap->attacktype & AT_DEATH)
502			trap->stats.dam = 127;
503	elmex	1.1	}
504
505			}