server/server/rune.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2003 Mark Wedel & Crossfire Development Team
    Copyright (C) 1992 Frank Tore Johansen

    This program 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 2 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    The authors can be reached via e-mail at <crossfire@schmorp.de>
*/

#include <global.h>
#ifndef __CEXTRACT__
# include <sproto.h>
#endif
#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))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
      return 0;
    }

  for (tmp = get_map_ob (m, nx, ny); tmp != NULL; tmp = tmp->above)
    if (tmp->type == RUNE)
      break;

  if (tmp)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune there.");
      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)
        {
          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)
        {
          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;
      tmp = rune_spell->clone ();
      insert_ob_in_ob (tmp, rune);

      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->x = nx;
  rune->y = ny;
  rune->map = m;
  rune->direction = dir;        /* where any spell will go upon detonation */
  set_owner (rune, op);         /* runes without need no owner */
  set_spell_skill (op, caster, spell, rune);
  insert_ob_in_map (rune, m, op, 0);
  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)
{
  int det = 0;

  if (!op->level)
    {
      return;
    }                           /* runes of level zero cannot detonate. */
  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_FACE);
}


/*  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 (HAS_RANDOM_ITEMS (op))
        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 = object_get_env_recursive (trap);

  /* 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;

  trap_show (trap, env);

  /* Only if it is a spell do we proceed here */
  if ((trap->inv && trap->inv->type == SPELL) || (trap->other_arch && trap->other_arch->clone.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->name, "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)
{
  object *tmp2;

  if (where == NULL)
    return 0;
  tmp2 = get_archetype ("runedet");
  tmp2->face = &new_faces[GET_ANIMATION (trap, 0)];
  tmp2->x = where->x;
  tmp2->y = where->y;
  tmp2->map = where->map;
  insert_ob_in_map (tmp2, where->map, NULL, 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:	1.10
Committed:	Wed Dec 13 00:42:04 2006 UTC (17 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.9:	+14 -8 lines
Log Message:	added a needed abstraction
#	User	Rev	Content
1	elmex	1.1	/*
2			CrossFire, A Multiplayer game for X-windows
3
4			Copyright (C) 2003 Mark Wedel & Crossfire Development Team
5			Copyright (C) 1992 Frank Tore Johansen
6
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21	root	1.5	The authors can be reached via e-mail at <crossfire@schmorp.de>
22	elmex	1.1	*/
23
24			#include <global.h>
25			#ifndef __CEXTRACT__
26	root	1.4	# include <sproto.h>
27	elmex	1.1	#endif
28			#include <spells.h>
29
30
31			#ifndef sqr
32	root	1.4	# define sqr(x) ((x)*(x))
33	elmex	1.1	#endif
34
35
36			/* peterm:
37			* write_rune:
38			* op: rune writer
39			* skop: skill object used for casting this rune
40			* dir: orientation of rune, direction rune's contained spell will
41			* be cast in, if applicable
42			* inspell: spell object to put into the rune, can be null if doing
43			* a marking rune.
44			* level: level of casting of the rune
45			* runename: name of the rune or message displayed by the rune for
46			* a rune of marking
47			*/
48
49	root	1.4	int
50			write_rune (object op, object caster, object spell, int dir, const char runename)
51			{
52			object tmp, rune_spell, *rune;
53			char buf[MAX_BUF];
54	root	1.7	maptile *m;
55	root	1.4	sint16 nx, ny;
56
57			if (!dir)
58	root	1.10	dir = 1;
59	root	1.4
60			nx = op->x + freearr_x[dir];
61			ny = op->y + freearr_y[dir];
62			m = op->map;
63
64			if (get_map_flags (m, &m, nx, ny, &nx, &ny))
65			{
66			new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
67			return 0;
68	elmex	1.1	}
69	root	1.10
70	root	1.4	for (tmp = get_map_ob (m, nx, ny); tmp != NULL; tmp = tmp->above)
71			if (tmp->type == RUNE)
72			break;
73
74			if (tmp)
75			{
76			new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune there.");
77	elmex	1.1	return 0;
78			}
79
80	root	1.4	if (spell->other_arch)
81	root	1.10	rune_spell = arch_to_object (spell->other_arch);
82	root	1.4	else
83			{
84			/* Player specified spell. The player has to know the spell, so
85			* lets just look through the players inventory see if they know it
86			* use the item_matched_string for our typical matching method.
87			*/
88			int bestmatch = 0, ms;
89
90			if (!runename \|\| *runename == 0)
91			{
92			new_draw_info (NDI_UNIQUE, 0, op, "Write a rune of what?");
93			return 0;
94			}
95
96			rune_spell = NULL;
97			for (tmp = op->inv; tmp; tmp = tmp->below)
98			{
99			if (tmp->type == SPELL)
100			{
101			ms = item_matched_string (op, tmp, runename);
102			if (ms > bestmatch)
103			{
104			bestmatch = ms;
105			rune_spell = tmp;
106	root	1.2	}
107			}
108			}
109	root	1.10
110	root	1.4	if (!rune_spell)
111			{
112			new_draw_info_format (NDI_UNIQUE, 0, op, "You don't know any spell named %s", runename);
113			return 0;
114			}
115	root	1.10
116	root	1.4	if (rune_spell->skill != spell->skill)
117			{
118			new_draw_info_format (NDI_UNIQUE, 0, op, "You can't cast %s with %s", &rune_spell->name, &spell->name);
119			return 0;
120			}
121	root	1.10
122	root	1.4	if (caster->path_denied & spell->path_attuned)
123			{
124			new_draw_info_format (NDI_UNIQUE, 0, op, "%s belongs to a spell path denied to you.", &rune_spell->name);
125			return 0;
126			}
127	root	1.10
128	root	1.4	if (caster_level (caster, rune_spell) < rune_spell->level)
129			{
130			new_draw_info_format (NDI_UNIQUE, 0, op, "%s is beyond your ability to cast!", &rune_spell->name);
131			return 0;
132			}
133	root	1.10
134	root	1.4	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA) > op->stats.sp)
135			{
136			new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough mana.");
137			return 0;
138			}
139	root	1.10
140	root	1.4	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE) > op->stats.grace)
141			{
142			new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough grace.");
143			return 0;
144			}
145	root	1.10
146	root	1.4	op->stats.grace -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE);
147			op->stats.sp -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA);
148			}
149	root	1.10
150	root	1.4	/* already proper rune. Note this should only be the case if other_arch was set */
151			if (rune_spell->type == RUNE)
152			{
153			rune = rune_spell;
154			}
155			else
156			{
157			rune = get_archetype (GENERIC_RUNE);
158			sprintf (buf, "You set off a rune of %s\n", &rune_spell->name);
159			rune->msg = buf;
160	root	1.10	tmp = rune_spell->clone ();
161	root	1.4	insert_ob_in_ob (tmp, rune);
162	root	1.10
163	root	1.4	if (spell->face != blank_face)
164			rune->face = spell->face;
165			}
166	root	1.10
167	root	1.4	rune->level = caster_level (caster, spell);
168			rune->stats.Cha = rune->level / 2; /* the invisibility parameter */
169			rune->x = nx;
170			rune->y = ny;
171			rune->map = m;
172			rune->direction = dir; /* where any spell will go upon detonation */
173			set_owner (rune, op); /* runes without need no owner */
174			set_spell_skill (op, caster, spell, rune);
175			insert_ob_in_map (rune, m, op, 0);
176			return 1;
177	elmex	1.1
178			}
179
180
181
182			/* move_rune: peterm
183			comments on runes:
184			rune->level : level at which rune will cast its spell.
185			rune->hp : number of detonations before rune goes away
186			rune->msg : message the rune displays when it goes off
187			rune->direction : direction it will cast a spell in
188			rune->dam : damage the rune will do if it doesn't cast spells
189			rune->attacktype: type of damage it does, if not casting spells
190			rune->other_arch: spell in the rune
191			rune->Cha : how hidden the rune is
192			rune->maxhp : number of spells the rune casts
193			*/
194
195	root	1.4	void
196			move_rune (object *op)
197			{
198			int det = 0;
199
200			if (!op->level)
201			{
202			return;
203			} /* runes of level zero cannot detonate. */
204			det = op->invisible;
205			if (!(rndm (0, MAX (1, (op->stats.Cha)) - 1)))
206			{
207			op->invisible = 0;
208			op->speed_left -= 1;
209			}
210			else
211			op->invisible = 1;
212			if (op->invisible != det)
213			update_object (op, UP_OBJ_FACE);
214	elmex	1.1	}
215
216
217			/* peterm: rune_attack
218			* function handles those runes which detonate but do not cast spells.
219			*/
220
221
222	root	1.4	void
223			rune_attack (object op, object victim)
224	elmex	1.1	{
225	root	1.4	if (victim)
226			{
227	root	1.6	hit_player (victim, op->stats.dam, op, op->attacktype, 1);
228	root	1.4
229	root	1.6	if (victim->destroyed ())
230	root	1.4	return;
231	root	1.6
232	root	1.4	/* if there's a disease in the needle, put it in the player */
233			if (HAS_RANDOM_ITEMS (op))
234			create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);
235	root	1.6
236	root	1.4	if (op->inv && op->inv->type == DISEASE)
237			{
238			object *disease = op->inv;
239
240			infect_object (victim, disease, 1);
241	root	1.9	disease->destroy ();
242	root	1.4	}
243	elmex	1.1	}
244	root	1.4	else
245			hit_map (op, 0, op->attacktype, 1);
246	elmex	1.1	}
247
248			/* This function generalizes attacks by runes/traps. This ought to make
249			* it possible for runes to attack from the inventory,
250			* it'll spring the trap on the victim.
251			*/
252	root	1.4	void
253			spring_trap (object trap, object victim)
254	elmex	1.1	{
255	root	1.4	object *env;
256			rv_vector rv;
257			int i;
258
259			/* Prevent recursion */
260			if (trap->stats.hp <= 0)
261			return;
262
263			if (QUERY_FLAG (trap, FLAG_IS_LINKED))
264			use_trigger (trap);
265
266			/* Only living objects can trigger runes that don't cast spells, as
267			* doing direct damage to a non-living object doesn't work anyway.
268			* Typical example is an arrow attacking a door.
269			*/
270			if (!QUERY_FLAG (victim, FLAG_ALIVE) && !trap->inv && !trap->other_arch)
271			return;
272
273			trap->stats.hp--; /decrement detcount /
274
275			if (victim && victim->type == PLAYER)
276			new_draw_info (NDI_UNIQUE, 0, victim, trap->msg);
277
278			/* Flash an image of the trap on the map so the poor sod
279			* knows what hit him.
280			*/
281			env = object_get_env_recursive (trap);
282
283			/* If the victim is not next to this trap, don't set it off.
284			* players shouldn't get hit by firing arrows at a door for example.
285			* At the same time, the trap will stick around until detonated
286			*/
287			get_rangevector (env, victim, &rv, 0);
288			if (rv.distance > 1)
289			return;
290
291			trap_show (trap, env);
292
293			/* Only if it is a spell do we proceed here */
294			if ((trap->inv && trap->inv->type == SPELL) \|\| (trap->other_arch && trap->other_arch->clone.type == SPELL))
295			{
296	elmex	1.1
297	root	1.6	if (trap->destroyed ())
298	root	1.2	return;
299	elmex	1.1
300	root	1.4	// breaks summon golem spells, which, for inexplicable reasons,
301			// do not work like summon golem spells at all but still require
302			// direction "0" to work at all.
303			//if (trap->direction)
304			// rv.direction = trap->direction;
305	elmex	1.1
306	root	1.4	for (i = 0; i < MAX (1, trap->stats.maxhp); i++)
307			{
308			if (trap->inv)
309			cast_spell (env, trap, trap->direction, trap->inv, NULL);
310			else
311			{
312			object *spell = arch_to_object (trap->other_arch);
313	elmex	1.1
314	root	1.4	cast_spell (env, trap, trap->direction, spell, NULL);
315	root	1.9	spell->destroy ();
316	root	1.2	}
317			}
318	root	1.4	}
319			else
320			{
321			rune_attack (trap, victim);
322	root	1.6	if (trap->destroyed ())
323	root	1.4	return;
324	elmex	1.1	}
325
326	root	1.4	if (trap->stats.hp <= 0)
327			{
328			trap->type = SIGN; /* make the trap impotent */
329			trap->stats.food = 20; /* make it stick around until its spells are gone */
330			SET_FLAG (trap, FLAG_IS_USED_UP);
331	elmex	1.1	}
332			}
333
334			/* dispel_rune: by peterm
335			* dispels the target rune, depending on the level of the actor
336			* and the level of the rune risk flag, if true, means that there is
337			* a chance that the trap/rune will detonate
338			*/
339	root	1.4	int
340			dispel_rune (object op, object caster, object spell, object skill, int dir)
341	elmex	1.1	{
342	root	1.4	object tmp, tmp2;
343			int searchflag = 1, mflags;
344			sint16 x, y;
345	root	1.7	maptile *m;
346	root	1.4
347			x = op->x + freearr_x[dir];
348			y = op->y + freearr_y[dir];
349			m = op->map;
350
351			mflags = get_map_flags (m, &m, x, y, &x, &y);
352
353			/* Should we perhaps not allow player to disable traps if a monster/
354			* player is standing on top?
355			*/
356			if (mflags & P_OUT_OF_MAP)
357			{
358			new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
359			return 0;
360			}
361
362			for (tmp = get_map_ob (m, x, y); tmp != NULL; tmp = tmp->above)
363			{
364			if (tmp->type == RUNE \|\| tmp->type == TRAP)
365			break;
366
367			/* we could put a probability chance here, but since nothing happens
368			* if you fail, no point on that. I suppose we could do a level
369			* comparison so low level players can't erase high level players runes.
370			*/
371			if (tmp->type == SIGN && !strcmp (tmp->arch->name, "rune_mark"))
372			{
373	root	1.9	tmp->destroy ();
374	root	1.4	new_draw_info (NDI_UNIQUE, 0, op, "You wipe out the rune of marking!");
375			return 1;
376			}
377
378			/* now search tmp's inventory for traps
379			* This is for chests, where the rune is in the chests inventory.
380			*/
381			for (tmp2 = tmp->inv; tmp2 != NULL; tmp2 = tmp2->below)
382			{
383			if (tmp2->type == RUNE \|\| tmp2->type == TRAP)
384			{
385			tmp = tmp2;
386			searchflag = 0;
387			break;
388	root	1.2	}
389			}
390	root	1.4	if (!searchflag)
391			break;
392	elmex	1.1	}
393	root	1.4
394			/* no rune there. */
395			if (tmp == NULL)
396			{
397			new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
398			return 0;
399			}
400			trap_disarm (op, tmp, 0, skill);
401			return 1;
402
403	elmex	1.1	}
404
405	root	1.4	int
406			trap_see (object op, object trap)
407			{
408			int chance;
409
410			chance = random_roll (0, 99, op, PREFER_HIGH);;
411	elmex	1.1
412	root	1.4	/* decide if we see the rune or not */
413			if ((trap->stats.Cha == 1) \|\| (chance > MIN (95, MAX (5, ((int) ((float) (op->map->difficulty
414			+ trap->level + trap->stats.Cha - op->level) / 10.0 * 50.0))))))
415			{
416			new_draw_info_format (NDI_UNIQUE, 0, op, "You spot a %s!", &trap->name);
417			return 1;
418	elmex	1.1	}
419	root	1.4	return 0;
420	elmex	1.1	}
421
422	root	1.4	int
423			trap_show (object trap, object where)
424			{
425			object *tmp2;
426	elmex	1.1
427	root	1.4	if (where == NULL)
428			return 0;
429			tmp2 = get_archetype ("runedet");
430			tmp2->face = &new_faces[GET_ANIMATION (trap, 0)];
431			tmp2->x = where->x;
432			tmp2->y = where->y;
433			tmp2->map = where->map;
434			insert_ob_in_map (tmp2, where->map, NULL, 0);
435			return 1;
436	elmex	1.1
437			}
438
439
440	root	1.4	int
441			trap_disarm (object disarmer, object trap, int risk, object *skill)
442			{
443			int trapworth; /* need to compute the experience worth of the trap
444			before we kill it */
445
446			/* this formula awards a more reasonable amount of exp */
447			trapworth = MAX (1, trap->level) * disarmer->map->difficulty *
448			sqr (MAX (trap->stats.dam, trap->inv ? trap->inv->level : 1)) / skill->level;
449
450			if (!(random_roll (0, (MAX (2, MIN (20, trap->level - skill->level + 5 - disarmer->stats.Dex / 2)) - 1), disarmer, PREFER_LOW)))
451			{
452			new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You successfully disarm the %s!", &trap->name);
453	root	1.9	trap->destroy (1);
454
455	root	1.4	/* If it is your own trap, (or any players trap), don't you don't
456			* get exp for it.
457			*/
458			if (trap->owner && trap->owner->type != PLAYER && risk)
459			return trapworth;
460			else
461			return 1; /* give minimal exp and say success */
462			}
463			else
464			{
465			new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You fail to disarm the %s.", &trap->name);
466			if (!(random_roll (0, (MAX (2, skill->level - trap->level + disarmer->stats.Dex / 2 - 6)) - 1, disarmer, PREFER_LOW)) && risk)
467			{
468			new_draw_info (NDI_UNIQUE, 0, disarmer, "In fact, you set it off!");
469			spring_trap (trap, disarmer);
470	elmex	1.1	}
471	root	1.4	return 0;
472			}
473	elmex	1.1	}
474
475
476			/* traps need to be adjusted for the difficulty of the map. The
477			* default traps are too strong for wimpy level 1 players, and
478			* unthreatening to anyone of high level
479			*/
480
481	root	1.4	void
482			trap_adjust (object *trap, int difficulty)
483			{
484			int i;
485	elmex	1.1
486	root	1.4	/* now we set the trap level to match the difficulty of the level
487			* the formula below will give a level from 1 to (2*difficulty) with
488			* a peak probability at difficulty
489			*/
490
491			trap->level = rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
492			if (trap->level < 1)
493			trap->level = 1;
494
495			/* set the hiddenness of the trap, similar formula to above */
496			trap->stats.Cha = rndm (0, 19) + rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
497
498			if (!trap->other_arch && !trap->inv)
499			{
500			/* set the damage of the trap.
501			* we get 0-4 pts of damage per level of difficulty of the map in
502			* the trap
503			*/
504
505			trap->stats.dam = 0;
506			for (i = 0; i < difficulty; i++)
507			trap->stats.dam += rndm (0, 4);
508
509			/* the poison trap special case */
510			if (trap->attacktype & AT_POISON)
511			{
512			trap->stats.dam = rndm (0, difficulty - 1);
513			if (trap->stats.dam < 1)
514			trap->stats.dam = 1;
515	root	1.2	}
516	elmex	1.1
517	root	1.4	/* so we get an appropriate amnt of exp for AT_DEATH traps */
518			if (trap->attacktype & AT_DEATH)
519			trap->stats.dam = 127;
520	elmex	1.1	}
521
522			}