server/server/rune.C

/*
 * CrossFire, A Multiplayer game for X-windows
 * 
 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
 * 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>
#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_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 (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 = 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)
{
  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:	1.21
Committed:	Sun Mar 11 02:12:45 2007 UTC (17 years, 2 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.20:	+1 -1 lines
Log Message:	- MAJOR CHANGE - you now need to use cfutil to install arches. - former bigfaces are broken in the server - bigfaces are no longer supported. at all. - use face numbers instead of pointers * saves lotsa space * saves lotsa indirections * saves lots(?) cpu cycles - completely rewrote face handling - faces can now be added at runtime - reload will add new faces - this does not apply to animations - use a hastable instead of binary search (faster) for faces - face caching is broken - facesets are gone - server always reports MAX_FACES to any client who asks
#	Content
1	/*
2	* CrossFire, A Multiplayer game for X-windows
3	*
4	* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
5	* Copyright (C) 2003 Mark Wedel & Crossfire Development Team
6	* Copyright (C) 1992 Frank Tore Johansen
7	*
8	* This program is free software; you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License as published by
10	* the Free Software Foundation; either version 2 of the License, or
11	* (at your option) any later version.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21	*
22	* The authors can be reached via e-mail at <crossfire@schmorp.de>
23	*/
24
25	#include <global.h>
26	#include <sproto.h>
27	#include <spells.h>
28
29	#ifndef sqr
30	# define sqr(x) ((x)*(x))
31	#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	* inspell: spell object to put into the rune, can be null if doing
40	* a marking rune.
41	* level: level of casting of the rune
42	* runename: name of the rune or message displayed by the rune for
43	* a rune of marking
44	*/
45
46	int
47	write_rune (object op, object caster, object spell, int dir, const char runename)
48	{
49	object tmp, rune_spell, *rune;
50	char buf[MAX_BUF];
51	maptile *m;
52	sint16 nx, ny;
53
54	if (!dir)
55	dir = 1;
56
57	nx = op->x + freearr_x[dir];
58	ny = op->y + freearr_y[dir];
59	m = op->map;
60
61	if (get_map_flags (m, &m, nx, ny, &nx, &ny) & (P_OUT_OF_MAP \| P_SAFE \| P_NO_MAGIC \| P_NO_CLERIC))
62	{
63	new_draw_info (NDI_UNIQUE, 0, op, "Can't make a rune there!");
64	return 0;
65	}
66
67	for (tmp = m->at (nx, ny).bot; tmp; tmp = tmp->above)
68	if (tmp->type == RUNE)
69	break;
70
71	if (tmp)
72	{
73	new_draw_info (NDI_UNIQUE, 0, op, "You can't write a rune on top of another rune.");
74	return 0;
75	}
76
77	if (spell->other_arch)
78	rune_spell = arch_to_object (spell->other_arch);
79	else
80	{
81	/* Player specified spell. The player has to know the spell, so
82	* lets just look through the players inventory see if they know it
83	* use the item_matched_string for our typical matching method.
84	*/
85	int bestmatch = 0, ms;
86
87	if (!runename \|\| *runename == 0)
88	{
89	new_draw_info (NDI_UNIQUE, 0, op, "Write a rune of what?");
90	return 0;
91	}
92
93	rune_spell = NULL;
94	for (tmp = op->inv; tmp; tmp = tmp->below)
95	if (tmp->type == SPELL)
96	{
97	ms = item_matched_string (op, tmp, runename);
98	if (ms > bestmatch)
99	{
100	bestmatch = ms;
101	rune_spell = tmp;
102	}
103	}
104
105	if (!rune_spell)
106	{
107	new_draw_info_format (NDI_UNIQUE, 0, op, "You don't know any spell named %s", runename);
108	return 0;
109	}
110
111	if (rune_spell->skill != spell->skill)
112	{
113	new_draw_info_format (NDI_UNIQUE, 0, op, "You can't cast %s with %s", &rune_spell->name, &spell->name);
114	return 0;
115	}
116
117	if (caster->path_denied & spell->path_attuned && !caster->flag [FLAG_WIZCAST])
118	{
119	new_draw_info_format (NDI_UNIQUE, 0, op, "%s belongs to a spell path denied to you.", &rune_spell->name);
120	return 0;
121	}
122
123	if (caster_level (caster, rune_spell) < rune_spell->level && !caster->flag [FLAG_WIZCAST])
124	{
125	new_draw_info_format (NDI_UNIQUE, 0, op, "%s is beyond your ability to cast!", &rune_spell->name);
126	return 0;
127	}
128
129	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA) > op->stats.sp)
130	{
131	new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough mana.");
132	return 0;
133	}
134
135	if (SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE) > op->stats.grace)
136	{
137	new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough grace.");
138	return 0;
139	}
140
141	op->stats.grace -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_GRACE);
142	op->stats.sp -= SP_level_spellpoint_cost (caster, rune_spell, SPELL_MANA);
143	}
144
145	/* already proper rune. Note this should only be the case if other_arch was set */
146	if (rune_spell->type == RUNE)
147	rune = rune_spell;
148	else
149	{
150	rune = get_archetype (GENERIC_RUNE);
151	sprintf (buf, "You set off a rune of %s\n", &rune_spell->name);
152	rune->msg = buf;
153	rune->insert (rune_spell->clone ());
154
155	if (spell->face != blank_face)
156	rune->face = spell->face;
157	}
158
159	rune->level = caster_level (caster, spell);
160	rune->stats.Cha = rune->level / 2; /* the invisibility parameter */
161	rune->direction = dir; /* where any spell will go upon detonation */
162	rune->set_owner (op); /* runes without need no owner */
163	set_spell_skill (op, caster, spell, rune);
164
165	m->insert (rune, nx, ny, op);
166	return 1;
167	}
168
169	/* move_rune: peterm
170	comments on runes:
171	rune->level : level at which rune will cast its spell.
172	rune->hp : number of detonations before rune goes away
173	rune->msg : message the rune displays when it goes off
174	rune->direction : direction it will cast a spell in
175	rune->dam : damage the rune will do if it doesn't cast spells
176	rune->attacktype: type of damage it does, if not casting spells
177	rune->other_arch: spell in the rune
178	rune->Cha : how hidden the rune is
179	rune->maxhp : number of spells the rune casts
180	*/
181	void
182	move_rune (object *op)
183	{
184	/* runes of level zero cannot detonate. */
185	if (!op->level)
186	return;
187
188	int det = op->invisible;
189
190	if (!(rndm (0, MAX (1, (op->stats.Cha)) - 1)))
191	{
192	op->invisible = 0;
193	op->speed_left -= 1;
194	}
195	else
196	op->invisible = 1;
197
198	if (op->invisible != det)
199	update_object (op, UP_OBJ_FACE);
200	}
201
202
203	/* peterm: rune_attack
204	* function handles those runes which detonate but do not cast spells.
205	*/
206
207
208	void
209	rune_attack (object op, object victim)
210	{
211	if (victim)
212	{
213	hit_player (victim, op->stats.dam, op, op->attacktype, 1);
214
215	if (victim->destroyed ())
216	return;
217
218	/* if there's a disease in the needle, put it in the player */
219	if (op->has_random_items ())
220	create_treasure (op->randomitems, op, 0, (victim->map ? victim->map->difficulty : 1), 0);
221
222	if (op->inv && op->inv->type == DISEASE)
223	{
224	object *disease = op->inv;
225
226	infect_object (victim, disease, 1);
227	disease->destroy ();
228	}
229	}
230	else
231	hit_map (op, 0, op->attacktype, 1);
232	}
233
234	/* This function generalizes attacks by runes/traps. This ought to make
235	* it possible for runes to attack from the inventory,
236	* it'll spring the trap on the victim.
237	*/
238	void
239	spring_trap (object trap, object victim)
240	{
241	object *env;
242	rv_vector rv;
243	int i;
244
245	/* Prevent recursion */
246	if (trap->stats.hp <= 0)
247	return;
248
249	if (QUERY_FLAG (trap, FLAG_IS_LINKED))
250	use_trigger (trap);
251
252	/* Only living objects can trigger runes that don't cast spells, as
253	* doing direct damage to a non-living object doesn't work anyway.
254	* Typical example is an arrow attacking a door.
255	*/
256	if (!QUERY_FLAG (victim, FLAG_ALIVE) && !trap->inv && !trap->other_arch)
257	return;
258
259	trap->stats.hp--; /decrement detcount /
260
261	if (victim && victim->type == PLAYER)
262	new_draw_info (NDI_UNIQUE, 0, victim, trap->msg);
263
264	/* Flash an image of the trap on the map so the poor sod
265	* knows what hit him.
266	*/
267	env = object_get_env_recursive (trap);
268
269	/* If the victim is not next to this trap, don't set it off.
270	* players shouldn't get hit by firing arrows at a door for example.
271	* At the same time, the trap will stick around until detonated
272	*/
273	get_rangevector (env, victim, &rv, 0);
274	if (rv.distance > 1)
275	return;
276
277	trap_show (trap, env);
278
279	/* Only if it is a spell do we proceed here */
280	if ((trap->inv && trap->inv->type == SPELL) \|\| (trap->other_arch && trap->other_arch->clone.type == SPELL))
281	{
282
283	if (trap->destroyed ())
284	return;
285
286	// breaks summon golem spells, which, for inexplicable reasons,
287	// do not work like summon golem spells at all but still require
288	// direction "0" to work at all.
289	//if (trap->direction)
290	// rv.direction = trap->direction;
291
292	for (i = 0; i < MAX (1, trap->stats.maxhp); i++)
293	{
294	if (trap->inv)
295	cast_spell (env, trap, trap->direction, trap->inv, NULL);
296	else
297	{
298	object *spell = arch_to_object (trap->other_arch);
299
300	cast_spell (env, trap, trap->direction, spell, NULL);
301	spell->destroy ();
302	}
303	}
304	}
305	else
306	{
307	rune_attack (trap, victim);
308	if (trap->destroyed ())
309	return;
310	}
311
312	if (trap->stats.hp <= 0)
313	{
314	trap->type = SIGN; /* make the trap impotent */
315	trap->stats.food = 20; /* make it stick around until its spells are gone */
316	SET_FLAG (trap, FLAG_IS_USED_UP);
317	}
318	}
319
320	/* dispel_rune: by peterm
321	* dispels the target rune, depending on the level of the actor
322	* and the level of the rune risk flag, if true, means that there is
323	* a chance that the trap/rune will detonate
324	*/
325	int
326	dispel_rune (object op, object caster, object spell, object skill, int dir)
327	{
328	object tmp, tmp2;
329	int searchflag = 1, mflags;
330	sint16 x, y;
331	maptile *m;
332
333	x = op->x + freearr_x[dir];
334	y = op->y + freearr_y[dir];
335	m = op->map;
336
337	mflags = get_map_flags (m, &m, x, y, &x, &y);
338
339	/* Should we perhaps not allow player to disable traps if a monster/
340	* player is standing on top?
341	*/
342	if (mflags & P_OUT_OF_MAP)
343	{
344	new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
345	return 0;
346	}
347
348	for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above)
349	{
350	if (tmp->type == RUNE \|\| tmp->type == TRAP)
351	break;
352
353	/* we could put a probability chance here, but since nothing happens
354	* if you fail, no point on that. I suppose we could do a level
355	* comparison so low level players can't erase high level players runes.
356	*/
357	if (tmp->type == SIGN && !strcmp (tmp->arch->name, "rune_mark"))
358	{
359	tmp->destroy ();
360	new_draw_info (NDI_UNIQUE, 0, op, "You wipe out the rune of marking!");
361	return 1;
362	}
363
364	/* now search tmp's inventory for traps
365	* This is for chests, where the rune is in the chests inventory.
366	*/
367	for (tmp2 = tmp->inv; tmp2 != NULL; tmp2 = tmp2->below)
368	{
369	if (tmp2->type == RUNE \|\| tmp2->type == TRAP)
370	{
371	tmp = tmp2;
372	searchflag = 0;
373	break;
374	}
375	}
376	if (!searchflag)
377	break;
378	}
379
380	/* no rune there. */
381	if (tmp == NULL)
382	{
383	new_draw_info (NDI_UNIQUE, 0, op, "There's nothing there!");
384	return 0;
385	}
386	trap_disarm (op, tmp, 0, skill);
387	return 1;
388
389	}
390
391	int
392	trap_see (object op, object trap)
393	{
394	int chance;
395
396	chance = random_roll (0, 99, op, PREFER_HIGH);;
397
398	/* decide if we see the rune or not */
399	if ((trap->stats.Cha == 1) \|\| (chance > MIN (95, MAX (5, ((int) ((float) (op->map->difficulty
400	+ trap->level + trap->stats.Cha - op->level) / 10.0 * 50.0))))))
401	{
402	new_draw_info_format (NDI_UNIQUE, 0, op, "You spot a %s!", &trap->name);
403	return 1;
404	}
405	return 0;
406	}
407
408	int
409	trap_show (object trap, object where)
410	{
411	if (where == NULL)
412	return 0;
413
414	object *tmp = get_archetype ("runedet");
415	tmp->face = GET_ANIMATION (trap, 0);
416	tmp->insert_at (where, 0);
417
418	return 1;
419	}
420
421	int
422	trap_disarm (object disarmer, object trap, int risk, object *skill)
423	{
424	int trapworth; /* need to compute the experience worth of the trap
425	before we kill it */
426
427	/* this formula awards a more reasonable amount of exp */
428	trapworth = MAX (1, trap->level) * disarmer->map->difficulty *
429	sqr (MAX (trap->stats.dam, trap->inv ? trap->inv->level : 1)) / skill->level;
430
431	if (!(random_roll (0, (MAX (2, MIN (20, trap->level - skill->level + 5 - disarmer->stats.Dex / 2)) - 1), disarmer, PREFER_LOW)))
432	{
433	new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You successfully disarm the %s!", &trap->name);
434	trap->destroy (1);
435
436	/* If it is your own trap, (or any players trap), don't you don't
437	* get exp for it.
438	*/
439	if (trap->owner && trap->owner->type != PLAYER && risk)
440	return trapworth;
441	else
442	return 1; /* give minimal exp and say success */
443	}
444	else
445	{
446	new_draw_info_format (NDI_UNIQUE, 0, disarmer, "You fail to disarm the %s.", &trap->name);
447	if (!(random_roll (0, (MAX (2, skill->level - trap->level + disarmer->stats.Dex / 2 - 6)) - 1, disarmer, PREFER_LOW)) && risk)
448	{
449	new_draw_info (NDI_UNIQUE, 0, disarmer, "In fact, you set it off!");
450	spring_trap (trap, disarmer);
451	}
452	return 0;
453	}
454	}
455
456
457	/* traps need to be adjusted for the difficulty of the map. The
458	* default traps are too strong for wimpy level 1 players, and
459	* unthreatening to anyone of high level
460	*/
461
462	void
463	trap_adjust (object *trap, int difficulty)
464	{
465	int i;
466
467	/* now we set the trap level to match the difficulty of the level
468	* the formula below will give a level from 1 to (2*difficulty) with
469	* a peak probability at difficulty
470	*/
471
472	trap->level = rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
473	if (trap->level < 1)
474	trap->level = 1;
475
476	/* set the hiddenness of the trap, similar formula to above */
477	trap->stats.Cha = rndm (0, 19) + rndm (0, difficulty - 1) + rndm (0, difficulty - 1);
478
479	if (!trap->other_arch && !trap->inv)
480	{
481	/* set the damage of the trap.
482	* we get 0-4 pts of damage per level of difficulty of the map in
483	* the trap
484	*/
485
486	trap->stats.dam = 0;
487	for (i = 0; i < difficulty; i++)
488	trap->stats.dam += rndm (0, 4);
489
490	/* the poison trap special case */
491	if (trap->attacktype & AT_POISON)
492	{
493	trap->stats.dam = rndm (0, difficulty - 1);
494	if (trap->stats.dam < 1)
495	trap->stats.dam = 1;
496	}
497
498	/* so we get an appropriate amnt of exp for AT_DEATH traps */
499	if (trap->attacktype & AT_DEATH)
500	trap->stats.dam = 127;
501	}
502
503	}