server/server/spell_effect.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
    Copyright (C) 2002 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 <object.h>
#include <living.h>
#ifndef __CEXTRACT__
# include <sproto.h>
#endif
#include <spells.h>
#include <sounds.h>

/* cast_magic_storm: This is really used mostly for spell
 * fumbles at the like.  tmp is the object to propogate.
 * op is what is casting this.
 */
void
cast_magic_storm (object *op, object *tmp, int lvl)
{
  if (!tmp)
    return;                     /* error */

  tmp->level = op->level;
  tmp->range += lvl / 5;        /* increase the area of destruction */
  tmp->duration += lvl / 5;

  /* Put a cap on duration for this - if the player fails in their
   * apartment, don't want it to go on so long that it kills them
   * multiple times.  Also, damge already increases with level,
   * so don't really need to increase the duration as much either.
   */
  if (tmp->duration >= 40)
    tmp->duration = 40;

  tmp->stats.dam = lvl;         /* nasty recoils! */
  tmp->stats.maxhp = tmp->count;        /* tract single parent */

  tmp->insert_at (op, op);
}

int
recharge (object *op, object *caster, object *spell_ob)
{
  object *wand, *tmp;
  int ncharges;

  wand = find_marked_object (op);
  if (wand == NULL || wand->type != WAND)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You need to mark the wand you want to recharge.");
      return 0;
    }
  if (!(random_roll (0, 3, op, PREFER_HIGH)))
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "The %s vibrates violently, then explodes!", query_name (wand));
      play_sound_map (op->map, op->x, op->y, SOUND_OB_EXPLODE);
      esrv_del_item (op->contr, wand->count);
      wand->destroy ();
      tmp = get_archetype ("fireball");
      tmp->stats.dam = (spell_ob->stats.dam + SP_level_dam_adjust (caster, spell_ob)) / 10;

      if (!tmp->stats.dam)
        tmp->stats.dam = 1;

      tmp->stats.hp = tmp->stats.dam / 2;

      if (tmp->stats.hp < 2)
        tmp->stats.hp = 2;

      tmp->insert_at (op);
      return 1;
    }

  ncharges = (spell_ob->stats.dam + SP_level_dam_adjust (caster, spell_ob));

  if (wand->inv && wand->inv->level)
    ncharges /= wand->inv->level;
  else
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "Your %s is broken.", query_name (wand));
      return 0;
    }

  if (!ncharges)
    ncharges = 1;

  wand->stats.food += ncharges;
  new_draw_info_format (NDI_UNIQUE, 0, op, "The %s glows with power.", query_name (wand));

  if (wand->arch && QUERY_FLAG (&wand->arch->clone, FLAG_ANIMATE))
    {
      SET_FLAG (wand, FLAG_ANIMATE);
      wand->set_speed (wand->arch->clone.speed);
    }

  return 1;
}

/* Create a missile (nonmagic - magic +4). Will either create bolts or arrows
 * based on whether a crossbow or bow is equiped. If neither, it defaults to
 * arrows.
 * Sets the plus based on the casters level. It is also settable with the
 * invoke command. If the caster attempts to create missiles with too
 * great a plus, the default is used.
 * The # of arrows created also goes up with level, so if a 30th level mage
 * wants LOTS of arrows, and doesn't care what the plus is he could
 * create nonnmagic arrows, or even -1, etc...
 */

int
cast_create_missile (object *op, object *caster, object *spell, int dir, const char *stringarg)
{
  int missile_plus = 0, bonus_plus = 0;
  const char *missile_name;
  object *tmp, *missile;

  missile_name = "arrow";

  for (tmp = op->inv; tmp != NULL; tmp = tmp->below)
    if (tmp->type == BOW && QUERY_FLAG (tmp, FLAG_APPLIED))
      missile_name = tmp->race;

  missile_plus = spell->stats.dam + SP_level_dam_adjust (caster, spell);

  if (archetype::find (missile_name) == NULL)
    {
      LOG (llevDebug, "Cast create_missile: could not find archetype %s\n", missile_name);
      return 0;
    }

  missile = get_archetype (missile_name);

  if (stringarg)
    {
      /* If it starts with a letter, presume it is a description */
      if (isalpha (*stringarg))
        {
          artifact *al = find_artifactlist (missile->type)->items;

          for (; al != NULL; al = al->next)
            if (!strcasecmp (al->item->name, stringarg))
              break;

          if (!al)
            {
              missile->destroy ();
              new_draw_info_format (NDI_UNIQUE, 0, op, "No such object %ss of %s", missile_name, stringarg);
              return 0;
            }

          if (al->item->slaying)
            {
              missile->destroy ();
              new_draw_info_format (NDI_UNIQUE, 0, op, "You are not allowed to create %ss of %s", missile_name, stringarg);
              return 0;
            }

          give_artifact_abilities (missile, al->item);
          /* These special arrows cost something extra.  Don't have them also be magical -
           * otherwise, in most cases, not enough will be created.  I don't want to get into
           * the parsing of having to do both plus and type.
           */
          bonus_plus = 1 + (al->item->value / 5);
          missile_plus = 0;
        }
      else if (atoi (stringarg) < missile_plus)
        missile_plus = atoi (stringarg);
    }

  if (missile_plus > 4)
    missile_plus = 4;
  else if (missile_plus < -4)
    missile_plus = -4;

  missile->nrof = spell->duration + SP_level_duration_adjust (caster, spell);
  missile->nrof -= 3 * (missile_plus + bonus_plus);

  if (missile->nrof < 1)
    missile->nrof = 1;

  missile->magic = missile_plus;
  /* Can't get any money for these objects */
  missile->value = 0;

  SET_FLAG (missile, FLAG_IDENTIFIED);

  if (!cast_create_obj (op, caster, missile, dir) && op->type == PLAYER && !missile->destroyed ())
    pick_up (op, missile);

  return 1;
}


/*  allows the choice of what sort of food object to make.
 *  If stringarg is NULL, it will create food dependent on level  --PeterM*/
int
cast_create_food (object *op, object *caster, object *spell_ob, int dir, const char *stringarg)
{
  int food_value;
  archetype *at = NULL;
  object *new_op;

  food_value = spell_ob->stats.food + +50 * SP_level_duration_adjust (caster, spell_ob);

  if (stringarg)
    {
      at = find_archetype_by_object_type_name (FOOD, stringarg);
      if (at == NULL)
        at = find_archetype_by_object_type_name (DRINK, stringarg);
      if (at == NULL || at->clone.stats.food > food_value)
        stringarg = NULL;
    }

  if (!stringarg)
    {
      archetype *at_tmp;

      /* We try to find the archetype with the maximum food value.
       * This removes the dependancy of hard coded food values in this
       * function, and addition of new food types is automatically added.
       * We don't use flesh types because the weight values of those need
       * to be altered from the donor.
       */

      /* We assume the food items don't have multiple parts */
      for (at_tmp = first_archetype; at_tmp != NULL; at_tmp = at_tmp->next)
        {
          if (at_tmp->clone.type == FOOD || at_tmp->clone.type == DRINK)
            {
              /* Basically, if the food value is something that is creatable
               * under the limits of the spell and it is higher than
               * the item we have now, take it instead.
               */
              if (at_tmp->clone.stats.food <= food_value && (!at || at_tmp->clone.stats.food > at->clone.stats.food))
                at = at_tmp;
            }
        }
    }
  /* Pretty unlikely (there are some very low food items), but you never
   * know
   */
  if (!at)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You don't have enough experience to create any food.");
      return 0;
    }

  food_value /= at->clone.stats.food;
  new_op = arch_to_object (at);
  new_op->nrof = food_value;

  new_op->value = 0;
  if (new_op->nrof < 1)
    new_op->nrof = 1;

  cast_create_obj (op, caster, new_op, dir);
  return 1;
}

int
probe (object *op, object *caster, object *spell_ob, int dir)
{
  int r, mflags, maxrange;
  object *tmp;
  maptile *m;


  if (!dir)
    {
      examine_monster (op, op);
      return 1;
    }
  maxrange = spell_ob->range + SP_level_range_adjust (caster, spell_ob);
  for (r = 1; r < maxrange; r++)
    {
      sint16 x = op->x + r * freearr_x[dir], y = op->y + r * freearr_y[dir];

      m = op->map;
      mflags = get_map_flags (m, &m, x, y, &x, &y);

      if (mflags & P_OUT_OF_MAP)
        break;

      if (!QUERY_FLAG (op, FLAG_WIZCAST) && (mflags & P_NO_MAGIC))
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Something blocks your magic.");
          return 0;
        }
      if (mflags & P_IS_ALIVE)
        {
          for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above)
            if (QUERY_FLAG (tmp, FLAG_ALIVE) && (tmp->type == PLAYER || QUERY_FLAG (tmp, FLAG_MONSTER)))
              {
                new_draw_info (NDI_UNIQUE, 0, op, "You detect something.");
                if (tmp->head != NULL)
                  tmp = tmp->head;
                examine_monster (op, tmp);
                return 1;
              }
        }
    }
  new_draw_info (NDI_UNIQUE, 0, op, "You detect nothing.");
  return 1;
}


/* This checks to see if 'pl' is invisible to 'mon'.
 * does race check, undead check, etc
 * Returns TRUE if mon can't see pl, false
 * otherwise.  This doesn't check range, walls, etc.  It
 * only checks the racial adjustments, and in fact that
 * pl is invisible.
 */
int
makes_invisible_to (object *pl, object *mon)
{

  if (!pl->invisible)
    return 0;
  if (pl->type == PLAYER)
    {
      /* If race isn't set, then invisible unless it is undead */
      if (!pl->contr->invis_race)
        {
          if (QUERY_FLAG (mon, FLAG_UNDEAD))
            return 0;
          return 1;
        }
      /* invis_race is set if we get here */
      if (!strcmp (pl->contr->invis_race, "undead") && is_true_undead (mon))
        return 1;
      /* No race, can't be invisible to it */
      if (!mon->race)
        return 0;
      if (strstr (mon->race, pl->contr->invis_race))
        return 1;
      /* Nothing matched above, return 0 */
      return 0;
    }
  else
    {
      /* monsters are invisible to everything */
      return 1;
    }
}

/* Makes the player or character invisible.
 * Note the spells to 'stack', but perhaps in odd ways.
 * the duration for all is cumulative.
 * In terms of invis undead/normal invis, it is the last one cast that
 * will determine if you are invisible to undead or normal monsters.
 * For improved invis, if you cast it with a one of the others, you
 * lose the improved part of it, and the above statement about undead/
 * normal applies.
 */
int
cast_invisible (object *op, object *caster, object *spell_ob)
{
  object *tmp;

  if (op->invisible > 1000)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You can not extend the duration of your invisibility any further");
      return 0;
    }

  /* Remove the switch with 90% duplicate code - just handle the differences with
   * and if statement or two.
   */
  op->invisible += spell_ob->duration + SP_level_duration_adjust (caster, spell_ob);
  /* max duration */
  if (op->invisible > 1000)
    op->invisible = 1000;

  if (op->type == PLAYER)
    {
      op->contr->invis_race = spell_ob->race;

      if (QUERY_FLAG (spell_ob, FLAG_MAKE_INVIS))
        op->contr->tmp_invis = 0;
      else
        op->contr->tmp_invis = 1;

      op->contr->hidden = 0;
    }
  if (makes_invisible_to (op, op))
    new_draw_info (NDI_UNIQUE, 0, op, "You can't see your hands!");
  else
    new_draw_info (NDI_UNIQUE, 0, op, "You feel more transparent!");

  update_object (op, UP_OBJ_FACE);

  /* Only search the active objects - only these should actually do
   * harm to the player.
   */
  for (tmp = active_objects; tmp != NULL; tmp = tmp->active_next)
    if (tmp->enemy == op)
      tmp->enemy = NULL;
  return 1;
}

/* earth to dust spell.  Basically destroys earthwalls in the area.
 */
int
cast_earth_to_dust (object *op, object *caster, object *spell_ob)
{
  object *tmp, *next;
  int range, i, j, mflags;
  sint16 sx, sy;
  maptile *m;

  if (op->type != PLAYER)
    return 0;

  range = spell_ob->range + SP_level_range_adjust (caster, spell_ob);

  for (i = -range; i <= range; i++)
    for (j = -range; j <= range; j++)
      {
        sx = op->x + i;
        sy = op->y + j;
        m = op->map;
        mflags = get_map_flags (m, &m, sx, sy, &sx, &sy);

        if (mflags & P_OUT_OF_MAP)
          continue;

        // earth to dust tears down everything that can be teared down
        for (tmp = GET_MAP_OB (m, sx, sy); tmp != NULL; tmp = next)
          {
            next = tmp->above;
            if (QUERY_FLAG (tmp, FLAG_TEAR_DOWN))
              hit_player (tmp, 9998, op, AT_PHYSICAL, 0);
          }
      }

  return 1;
}

void
execute_word_of_recall (object *op)
{
  if (object *pl = op->in_player ())
    {
      if (pl->ms ().flags () & P_NO_CLERIC && !QUERY_FLAG (pl, FLAG_WIZCAST))
        new_draw_info (NDI_UNIQUE, 0, pl, "You feel something fizzle inside you.");
      else
        {
          // remove first so we do not call update_stats
          op->remove ();
          pl->enter_exit (op);
        }
    }

  op->destroy ();
}

/* Word of recall causes the player to return 'home'.
 * we put a force into the player object, so that there is a 
 * time delay effect.
 */
int
cast_word_of_recall (object *op, object *caster, object *spell_ob)
{
  object *dummy;
  int time;

  if (op->type != PLAYER)
    return 0;

  if (find_obj_by_type_subtype (op, SPELL_EFFECT, SP_WORD_OF_RECALL))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You feel a force starting to build up inside you.");
      return 1;
    }

  dummy = get_archetype (FORCE_NAME);
  if (dummy == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Oops, program error!");
      LOG (llevError, "cast_word_of_recall: get_archetype(force) failed!\n");
      return 0;
    }

  time = spell_ob->duration - SP_level_duration_adjust (caster, spell_ob);
  if (time < 1)
    time = 1;

  /* value of speed really doesn't make much difference, as long as it is
   * positive.  Lower value may be useful so that the problem doesn't
   * do anything really odd if it say a -1000 or something.
   */
  dummy->set_speed (0.002);
  dummy->speed_left = -dummy->speed * time;
  dummy->type = SPELL_EFFECT;
  dummy->subtype = SP_WORD_OF_RECALL;

  /* If we could take advantage of enter_player_savebed() here, it would be
   * nice, but until the map load fails, we can't.
   */
  EXIT_PATH (dummy) = op->contr->savebed_map;
  EXIT_X    (dummy) = op->contr->bed_x;
  EXIT_Y    (dummy) = op->contr->bed_y;

  op->insert (dummy);

  new_draw_info (NDI_UNIQUE, 0, op, "You feel a force starting to build up inside you.");

  return 1;
}

/* cast_wonder
 * wonder is really just a spell that will likely cast another
 * spell.
 */
int
cast_wonder (object *op, object *caster, int dir, object *spell_ob)
{
  object *newspell;

  if (!rndm (0, 3))
    return cast_cone (op, caster, dir, spell_ob);

  if (spell_ob->randomitems)
    {
      newspell = generate_treasure (spell_ob->randomitems, caster->level);
      if (!newspell)
        {
          LOG (llevError, "cast_wonder: Unable to get a spell!\n");
          return 0;
        }
      if (newspell->type != SPELL)
        {
          LOG (llevError, "cast_wonder: spell returned is not a spell (%d, %s)!\n", &newspell->type, &newspell->name);
          return 0;
        }
      /* Prevent inifinit recursion */
      if (newspell->subtype == SP_WONDER)
        {
          LOG (llevError, "cast_wonder: spell returned is another wonder spell!\n");
          return 0;
        }
      return cast_spell (op, caster, dir, newspell, NULL);
    }
  return 1;
}

int
perceive_self (object *op)
{
  char *cp = describe_item (op, op), buf[MAX_BUF];
  archetype *at = archetype::find (ARCH_DEPLETION);
  object *tmp;
  int i;

  tmp = find_god (determine_god (op));
  if (tmp)
    new_draw_info_format (NDI_UNIQUE, 0, op, "You worship %s", &tmp->name);
  else
    new_draw_info (NDI_UNIQUE, 0, op, "You worship no god");

  tmp = present_arch_in_ob (at, op);

  if (*cp == '\0' && tmp == NULL)
    new_draw_info (NDI_UNIQUE, 0, op, "You feel very mundane");
  else
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You have:");
      new_draw_info (NDI_UNIQUE, 0, op, cp);
      if (tmp != NULL)
        {
          for (i = 0; i < NUM_STATS; i++)
            {
              if (get_attr_value (&tmp->stats, i) < 0)
                {
                  new_draw_info_format (NDI_UNIQUE, 0, op, "Your %s is depleted by %d", statname[i], -(get_attr_value (&tmp->stats, i)));
                }
            }
        }
    }

  if (is_dragon_pl (op))
    {
      /* now grab the 'dragon_ability'-force from the player's inventory */
      for (tmp = op->inv; tmp != NULL; tmp = tmp->below)
        {
          if (tmp->type == FORCE && !strcmp (tmp->arch->name, "dragon_ability_force"))
            {
              if (tmp->stats.exp == 0)
                {
                  sprintf (buf, "Your metabolism isn't focused on anything.");
                }
              else
                {
                  sprintf (buf, "Your metabolism is focused on %s.", change_resist_msg[tmp->stats.exp]);
                }
              new_draw_info (NDI_UNIQUE, 0, op, buf);
              break;
            }
        }
    }
  return 1;
}

/* int cast_create_town_portal (object *op, object *caster, int dir)
 *
 * This function cast the spell of town portal for op
 *
 * The spell operates in two passes. During the first one a place
 * is marked as a destination for the portal. During the second one,
 * 2 portals are created, one in the position the player cast it and
 * one in the destination place. The portal are synchronized and 2 forces
 * are inserted in the player to destruct the portal next time player
 * creates a new portal pair.
 * This spell has a side effect that it allows people to meet each other
 * in a permanent, private,  appartements by making a town portal from it
 * to the town or another public place. So, check if the map is unique and if
 * so return an error
 *
 * Code by Tchize (david.delbecq@usa.net)
 */
int
cast_create_town_portal (object *op, object *caster, object *spell, int dir)
{
  object *dummy, *force, *old_force;
  archetype *perm_portal;
  char portal_name[1024], portal_message[1024];
  maptile *exitmap;
  int op_level;

  /* Check to see if the map the player is currently on is a per player unique
   * map.  This can be determined in that per player unique maps have the
   * full pathname listed.
   */
  if (!strncmp (op->map->path, settings.localdir, strlen (settings.localdir)) && settings.create_home_portals != TRUE)
    {
      new_draw_info (NDI_UNIQUE | NDI_NAVY, 0, op, "You can't cast that here.\n");
      return 0;
    }

  /* The first thing to do is to check if we have a marked destination
   * dummy is used to make a check inventory for the force
   */
  dummy = arch_to_object (spell->other_arch);
  if (dummy == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Oops, program error!");
      LOG (llevError, "object::create failed (force in cast_create_town_portal for %s!\n", &op->name);
      return 0;
    }

  force = check_inv_recursive (op, dummy);

  if (force == NULL)
    {
      /* Here we know there is no destination marked up.
       * We have 2 things to do:
       * 1. Mark the destination in the player inventory.
       * 2. Let the player know it worked.
       */
      dummy->name = op->map->path;
      EXIT_X (dummy) = op->x;
      EXIT_Y (dummy) = op->y;
      insert_ob_in_ob (dummy, op);
      new_draw_info (NDI_UNIQUE | NDI_NAVY, 0, op, "You fix this place in your mind.\nYou feel you are able to come here from anywhere.");
      return 1;
    }

  dummy->destroy ();

  /* Here we know where the town portal should go to
   * We should kill any existing portal associated with the player.
   * Than we should create the 2 portals.
   * For each of them, we need:
   *    - To create the portal with the name of the player+destination map
   *    - set the owner of the town portal
   *    - To mark the position of the portal in the player's inventory
   *      for easier destruction. 
   *
   *  The mark works has follow:
   *   slaying: Existing town portal
   *   hp, sp : x & y of the associated portal
   *   name   : name of the portal
   *   race   : map the portal is in
   */

  /* First step: killing existing town portals */
  dummy = get_archetype (spell->race);
  if (dummy == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Oops, program error!");
      LOG (llevError, "object::create failed (force) in cast_create_town_portal for %s!\n", &op->name);
      return 0;
    }

  perm_portal = archetype::find (spell->slaying);

  /* To kill a town portal, we go trough the player's inventory,
   * for each marked portal in player's inventory,
   *   -We try load the associated map (if impossible, consider the portal destructed)
   *   -We find any portal in the specified location.
   *      If it has the good name, we destruct it.
   *   -We destruct the force indicating that portal.
   */
  while ((old_force = check_inv_recursive (op, dummy)))
    {
      exitmap = maptile::find_sync (old_force->race, op->map);

      if (exitmap)
        {
          exitmap->load_sync ();

          int exitx = EXIT_X (old_force);
          int exity = EXIT_Y (old_force);

          for (object *tmp = present_arch (perm_portal, exitmap, exitx, exity); tmp; tmp = tmp->above)
            {
              if (tmp->name == old_force->name)
                {
                  tmp->destroy ();
                  break;
                }
            }
        }

      old_force->destroy ();
    }

  dummy->destroy ();

  /* Creating the portals.
   * The very first thing to do is to ensure
   * access to the destination map.
   * If we can't, don't fizzle. Simply warn player.
   * This ensure player pays his mana for the spell
   * because HE is responsible of forgotting.
   * 'force' is the destination of the town portal, which we got
   * from the players inventory above.
   */

  /* Ensure exit map is loaded */
  exitmap = maptile::find_sync (force->name);

  /* If we were unable to load (ex. random map deleted), warn player */
  if (!exitmap)
    {
      new_draw_info (NDI_UNIQUE | NDI_NAVY, 0, op, "Something strange happens.\nYou can't remember where to go!?");
      force->destroy ();
      return 1;
    }

  exitmap->load_sync ();

  op_level = caster_level (caster, spell);
  if (op_level < 15)
    snprintf (portal_message, 1024,
              "\nThe air moves around you and\na huge smell of ammonia\nsurounds you as you pass\nthrough %s's tiny portal\nPouah!\n",
              &op->name);
  else if (op_level < 30)
    snprintf (portal_message, 1024,
              "\n%s's portal smells of ozone.\nYou do a lot of movements and finally pass\nthrough the small hole in the air\n", &op->name);
  else if (op_level < 60)
    snprintf (portal_message, 1024, "\nA shining door opens in the air in front of you,\nshowing you the path to another place.\n");
  else
    snprintf (portal_message, 1024, "\nAs you walk through %s's portal, flowers come out\nfrom the ground around you.\nYou feel awed.\n",
              &op->name);

  /* Create a portal in front of player
   * dummy contain the portal and
   * force contain the track to kill it later
   */
  snprintf (portal_name, 1024, "%s's portal to %s", &op->name, &force->name);
  dummy = get_archetype (spell->slaying);       /*The portal */
  if (dummy == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Oops, program error!");
      LOG (llevError, "object::create failed (perm_magic_portal) in cast_create_town_portal for %s!\n", &op->name);
      return 0;
    }

  EXIT_PATH (dummy) = force->name;
  EXIT_X (dummy) = EXIT_X (force);
  EXIT_Y (dummy) = EXIT_Y (force);
  dummy->name = dummy->name_pl = portal_name;
  dummy->msg = portal_message;
  dummy->race = op->name;       /*Save the owner of the portal */
  cast_create_obj (op, caster, dummy, 0);

  /* Now we need to to create a town portal marker inside the player
   * object, so on future castings, we can know that he has an active
   * town portal.
   */
  object *tmp = get_archetype (spell->race);

  if (!tmp)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Oops, program error!");
      LOG (llevError, "object::create failed (force) in cast_create_town_portal for %s!\n", &op->name);
      return 0;
    }

  tmp->race = op->map->path;
  tmp->name = portal_name;
  EXIT_X (tmp) = dummy->x;
  EXIT_Y (tmp) = dummy->y;
  op->insert (tmp);

  /* Create a portal in the destination map
   * dummy contain the portal and
   * force the track to kill it later
   * the 'force' variable still contains the 'reminder' of
   * where this portal goes to.
   */
  snprintf (portal_name, 1024, "%s's portal to %s", &op->name, &op->map->path);
  dummy = get_archetype (spell->slaying);       /*The portal */
  if (dummy == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Oops, program error!");
      LOG (llevError, "object::create failed (perm_magic_portal) in cast_create_town_portal for %s!\n", &op->name);
      return 0;
    }

  EXIT_PATH (dummy) = op->map->path;
  EXIT_X (dummy) = op->x;
  EXIT_Y (dummy) = op->y;
  dummy->name = dummy->name_pl = portal_name;
  dummy->msg = portal_message;
  dummy->race = op->name;       /*Save the owner of the portal */
  exitmap->insert (dummy, EXIT_X (force), EXIT_Y (force), op);

  /* Now we create another town portal marker that
   * points back to the one we just made
   */
  tmp = get_archetype (spell->race);
  if (tmp == NULL)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Oops, program error!");
      LOG (llevError, "object::create failed (force) in cast_create_town_portal for %s!\n", &op->name);
      return 0;
    }

  tmp->race = force->name;
  tmp->name = portal_name;
  EXIT_X (tmp) = dummy->x;
  EXIT_Y (tmp) = dummy->y;
  insert_ob_in_ob (tmp, op);

  /* Describe the player what happened
   */
  new_draw_info (NDI_UNIQUE | NDI_NAVY, 0, op, "You see air moving and showing you the way home.");
  force->destroy ();

  return 1;
}

/* This creates magic walls.  Really, it can create most any object,
 * within some reason.
 */
int
magic_wall (object *op, object *caster, int dir, object *spell_ob)
{
  object *tmp;
  int i, posblocked, negblocked, maxrange;
  sint16 x, y;
  maptile *m;
  const char *name;
  archetype *at;

  if (!dir)
    {
      dir = op->facing;
      x = op->x;
      y = op->y;
    }
  else
    {
      x = op->x + freearr_x[dir];
      y = op->y + freearr_y[dir];
    }

  m = op->map;

  if ((spell_ob->move_block || x != op->x || y != op->y) &&
      (get_map_flags (m, &m, x, y, &x, &y) & (P_OUT_OF_MAP | P_IS_ALIVE) ||
       ((spell_ob->move_block & GET_MAP_MOVE_BLOCK (m, x, y)) == spell_ob->move_block)))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Something is in the way.");
      return 0;
    }

  if (spell_ob->other_arch)
    tmp = arch_to_object (spell_ob->other_arch);
  else if (spell_ob->race)
    {
      char buf1[MAX_BUF];

      sprintf (buf1, spell_ob->race, dir);
      at = archetype::find (buf1);
      if (!at)
        {
          LOG (llevError, "summon_wall: Unable to find archetype %s\n", buf1);
          new_draw_info (NDI_UNIQUE, 0, op, "This spell is broken.");
          return 0;
        }

      tmp = arch_to_object (at);
    }
  else
    {
      LOG (llevError, "magic_wall: spell %s lacks other_arch\n", &spell_ob->name);
      return 0;
    }

  if (tmp->type == SPELL_EFFECT)
    {
      tmp->attacktype = spell_ob->attacktype;
      tmp->duration = spell_ob->duration + SP_level_duration_adjust (caster, spell_ob);
      tmp->stats.dam = spell_ob->stats.dam + SP_level_dam_adjust (caster, spell_ob);
      tmp->range = 0;
    }
  else if (QUERY_FLAG (tmp, FLAG_ALIVE))
    {
      tmp->stats.hp = spell_ob->duration + SP_level_duration_adjust (caster, spell_ob);
      tmp->stats.maxhp = tmp->stats.hp;
    }

  if (QUERY_FLAG (spell_ob, FLAG_IS_USED_UP) || QUERY_FLAG (tmp, FLAG_IS_USED_UP))
    {
      tmp->stats.food = spell_ob->duration + SP_level_duration_adjust (caster, spell_ob);
      SET_FLAG (tmp, FLAG_IS_USED_UP);
    }

  if (QUERY_FLAG (spell_ob, FLAG_TEAR_DOWN))
    {
      tmp->stats.hp = spell_ob->stats.dam + SP_level_dam_adjust (caster, spell_ob);
      tmp->stats.maxhp = tmp->stats.hp;
      SET_FLAG (tmp, FLAG_TEAR_DOWN);
      SET_FLAG (tmp, FLAG_ALIVE);
    }

  /* This can't really hurt - if the object doesn't kill anything,
   * these fields just won't be used. Do not set the owner for
   * earthwalls, though, so they survive restarts.
   */
  if (tmp->type != EARTHWALL) //TODO
    tmp->set_owner (op);

  set_spell_skill (op, caster, spell_ob, tmp);
  tmp->level = caster_level (caster, spell_ob) / 2;

  name = tmp->name;
  if (!(tmp = m->insert (tmp, x, y, op)))
    {
      new_draw_info_format (NDI_UNIQUE, 0, op, "Something destroys your %s", name);
      return 0;
    }

  /* If this is a spellcasting wall, need to insert the spell object */
  if (tmp->other_arch && tmp->other_arch->clone.type == SPELL)
    insert_ob_in_ob (arch_to_object (tmp->other_arch), tmp);

  /*  This code causes the wall to extend some distance in
   * each direction, or until an obstruction is encountered. 
   * posblocked and negblocked help determine how far the
   * created wall can extend, it won't go extend through
   * blocked spaces.
   */
  maxrange = spell_ob->range + SP_level_range_adjust (caster, spell_ob);
  posblocked = 0;
  negblocked = 0;

  for (i = 1; i <= maxrange; i++)
    {
      int dir2;

      dir2 = (dir < 4) ? (dir + 2) : dir - 2;

      x = tmp->x + i * freearr_x[dir2];
      y = tmp->y + i * freearr_y[dir2];
      m = tmp->map;

      if (!(get_map_flags (m, &m, x, y, &x, &y) & (P_OUT_OF_MAP | P_IS_ALIVE)) &&
          ((spell_ob->move_block & GET_MAP_MOVE_BLOCK (m, x, y)) != spell_ob->move_block) && !posblocked)
        {
          object *tmp2 = tmp->clone ();
          m->insert (tmp2, x, y, op);

          /* If this is a spellcasting wall, need to insert the spell object */
          if (tmp2->other_arch && tmp2->other_arch->clone.type == SPELL)
            tmp2->insert (arch_to_object (tmp2->other_arch));

        }
      else
        posblocked = 1;

      x = tmp->x - i * freearr_x[dir2];
      y = tmp->y - i * freearr_y[dir2];
      m = tmp->map;

      if (!(get_map_flags (m, &m, x, y, &x, &y) & (P_OUT_OF_MAP | P_IS_ALIVE)) &&
          ((spell_ob->move_block & GET_MAP_MOVE_BLOCK (m, x, y)) != spell_ob->move_block) && !negblocked)
        {
          object *tmp2 = tmp->clone ();
          m->insert (tmp2, x, y, op);

          if (tmp2->other_arch && tmp2->other_arch->clone.type == SPELL)
            tmp2->insert (arch_to_object (tmp2->other_arch));
        }
      else
        negblocked = 1;
    }

  if (QUERY_FLAG (tmp, FLAG_BLOCKSVIEW))
    update_all_los (op->map, op->x, op->y);

  return 1;
}

int
dimension_door (object *op, object *caster, object *spob, int dir)
{
  uint32 dist, maxdist;
  int mflags;
  maptile *m;
  sint16 sx, sy;

  if (op->type != PLAYER)
    return 0;

  if (!dir)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "In what direction?");
      return 0;
    }

  /* Given the new outdoor maps, can't let players dimension door for
   * ever, so put limits in.
   */
  maxdist = spob->range + SP_level_range_adjust (caster, spob);

  if (op->contr->count)
    {
      if (op->contr->count > maxdist)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You can't dimension door that far!");
          return 0;
        }

      for (dist = 0; dist < op->contr->count; dist++)
        {
          mflags = get_map_flags (op->map, &m, op->x + freearr_x[dir] * (dist + 1), op->y + freearr_y[dir] * (dist + 1), &sx, &sy);

          if (mflags & (P_NO_MAGIC | P_OUT_OF_MAP))
            break;

          if ((mflags & P_BLOCKSVIEW) && OB_TYPE_MOVE_BLOCK (op, GET_MAP_MOVE_BLOCK (m, sx, sy)))
            break;
        }

      if (dist < op->contr->count)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Something blocks the magic of the spell.\n");
          op->contr->count = 0;
          return 0;
        }

      op->contr->count = 0;

      /* Remove code that puts player on random space on maps.  IMO,
       * a lot of maps probably have areas the player should not get to,
       * but may not be marked as NO_MAGIC (as they may be bounded
       * by such squares).  Also, there are probably treasure rooms and
       * lots of other maps that protect areas with no magic, but the
       * areas themselves don't contain no magic spaces.
       */
      /* This call here is really just to normalize the coordinates */
      mflags = get_map_flags (op->map, &m, op->x + freearr_x[dir] * dist, op->y + freearr_y[dir] * dist, &sx, &sy);
      if (mflags & P_IS_ALIVE || OB_TYPE_MOVE_BLOCK (op, GET_MAP_MOVE_BLOCK (m, sx, sy)))
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You cast your spell, but nothing happens.\n");
          return 1;             /* Maybe the penalty should be more severe... */
        }
    }
  else
    {
      /* Player didn't specify a distance, so lets see how far
       * we can move the player.  Don't know why this stopped on
       * spaces that blocked the players view.
       */

      for (dist = 0; dist < maxdist; dist++)
        {
          mflags = get_map_flags (op->map, &m, op->x + freearr_x[dir] * (dist + 1), op->y + freearr_y[dir] * (dist + 1), &sx, &sy);

          if (mflags & (P_NO_MAGIC | P_OUT_OF_MAP))
            break;

          if ((mflags & P_BLOCKSVIEW) && OB_TYPE_MOVE_BLOCK (op, GET_MAP_MOVE_BLOCK (m, sx, sy)))
            break;

        }

      /* If the destination is blocked, keep backing up until we
       * find a place for the player.
       */
      for (; dist > 0; dist--)
        {
          if (get_map_flags (op->map, &m, op->x + freearr_x[dir] * dist, op->y + freearr_y[dir] * dist,
                             &sx, &sy) & (P_OUT_OF_MAP | P_IS_ALIVE))
            continue;


          if (!OB_TYPE_MOVE_BLOCK (op, GET_MAP_MOVE_BLOCK (m, sx, sy)))
            break;

        }
      if (!dist)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Your spell failed!\n");
          return 0;
        }
    }

  /* Actually move the player now */
  if (!(op = op->map->insert (op, op->x + freearr_x[dir] * dist, op->y + freearr_y[dir] * dist, op)))
    return 1;

  op->speed_left = -FABS (op->speed) * 5;       /* Freeze them for a short while */
  return 1;
}


/* cast_heal: Heals something.
 * op is the caster.
 * dir is the direction he is casting it in.
 * spell is the spell object.
 */
int
cast_heal (object *op, object *caster, object *spell, int dir)
{
  object *tmp;
  archetype *at;
  object *poison;
  int heal = 0, success = 0;

  tmp = find_target_for_friendly_spell (op, dir);

  if (tmp == NULL)
    return 0;

  /* Figure out how many hp this spell might cure.
   * could be zero if this spell heals effects, not damage.
   */
  heal = spell->stats.dam;
  if (spell->stats.hp)
    heal += random_roll (spell->stats.hp, 6, op, PREFER_HIGH) + spell->stats.hp;

  if (heal)
    {
      if (tmp->stats.hp >= tmp->stats.maxhp)
        {
          new_draw_info (NDI_UNIQUE, 0, tmp, "You are already fully healed.");
        }
      else
        {
          /* See how many points we actually heal.  Instead of messages
           * based on type of spell, we instead do messages based
           * on amount of damage healed.
           */
          if (heal > (tmp->stats.maxhp - tmp->stats.hp))
            heal = tmp->stats.maxhp - tmp->stats.hp;
          tmp->stats.hp += heal;

          if (tmp->stats.hp >= tmp->stats.maxhp)
            {
              new_draw_info (NDI_UNIQUE, 0, tmp, "You feel just fine!");
            }
          else if (heal > 50)
            {
              new_draw_info (NDI_UNIQUE, 0, tmp, "Your wounds close!");
            }
          else if (heal > 25)
            {
              new_draw_info (NDI_UNIQUE, 0, tmp, "Your wounds mostly close.");
            }
          else if (heal > 10)
            {
              new_draw_info (NDI_UNIQUE, 0, tmp, "Your wounds start to fade.");
            }
          else
            {
              new_draw_info (NDI_UNIQUE, 0, tmp, "Your wounds start to close.");
            }
          success = 1;
        }
    }
  if (spell->attacktype & AT_DISEASE)
    if (cure_disease (tmp, op))
      success = 1;

  if (spell->attacktype & AT_POISON)
    {
      at = archetype::find ("poisoning");
      poison = present_arch_in_ob (at, tmp);
      if (poison)
        {
          success = 1;
          new_draw_info (NDI_UNIQUE, 0, tmp, "Your body feels cleansed");
          poison->stats.food = 1;
        }
    }
  if (spell->attacktype & AT_CONFUSION)
    {
      poison = present_in_ob_by_name (FORCE, "confusion", tmp);
      if (poison)
        {
          success = 1;
          new_draw_info (NDI_UNIQUE, 0, tmp, "Your mind feels clearer");
          poison->duration = 1;
        }
    }
  if (spell->attacktype & AT_BLIND)
    {
      at = archetype::find ("blindness");
      poison = present_arch_in_ob (at, tmp);
      if (poison)
        {
          success = 1;
          new_draw_info (NDI_UNIQUE, 0, tmp, "Your vision begins to return.");
          poison->stats.food = 1;
        }
    }
  if (spell->last_sp && tmp->stats.sp < tmp->stats.maxsp)
    {
      tmp->stats.sp += spell->last_sp;
      if (tmp->stats.sp > tmp->stats.maxsp)
        tmp->stats.sp = tmp->stats.maxsp;
      success = 1;
      new_draw_info (NDI_UNIQUE, 0, tmp, "Magical energy surges through your body!");
    }
  if (spell->last_grace && tmp->stats.grace < tmp->stats.maxgrace)
    {
      tmp->stats.grace += spell->last_grace;
      if (tmp->stats.grace > tmp->stats.maxgrace)
        tmp->stats.grace = tmp->stats.maxgrace;
      success = 1;
      new_draw_info (NDI_UNIQUE, 0, tmp, "You feel redeemed with your god!");
    }
  if (spell->stats.food && tmp->stats.food < 999)
    {
      tmp->stats.food += spell->stats.food;
      if (tmp->stats.food > 999)
        tmp->stats.food = 999;
      success = 1;
      /* We could do something a bit better like the messages for healing above */
      new_draw_info (NDI_UNIQUE, 0, tmp, "You feel your belly fill with food");
    }
  return success;
}


/* This is used for the spells that gain stats.  There are no spells
 * right now that icnrease wis/int/pow on a temp basis, so no
 * good comments for those.
 */
static const char *const no_gain_msgs[NUM_STATS] = {
  "You grow no stronger.",
  "You grow no more agile.",
  "You don't feel any healthier.",
  "no wis",
  "You are no easier to look at.",
  "no int",
  "no pow"
};

int
cast_change_ability (object *op, object *caster, object *spell_ob, int dir, int silent)
{
  object *force = NULL;
  int i;

  /* if dir = 99 op defaults to tmp, eat_special_food() requires this. */
  object *tmp = dir
     ? find_target_for_friendly_spell (op, dir)
     : op;

  if (!tmp)
    return 0;

  /* If we've already got a force of this type, don't add a new one. */
  for (object *tmp2 = tmp->inv; tmp2; tmp2 = tmp2->below)
    {
      if (tmp2->type == FORCE && tmp2->subtype == FORCE_CHANGE_ABILITY)
        {
          if (tmp2->name == spell_ob->name)
            {
              force = tmp2;     /* the old effect will be "refreshed" */
              break;
            }
          else if (spell_ob->race && spell_ob->race == tmp2->name)
            {
              if (!silent)
                new_draw_info_format (NDI_UNIQUE, 0, op, "You can not cast %s while %s is in effect", &spell_ob->name, &tmp2->name_pl);
              return 0;
            }
        }
    }
  if (force == NULL)
    {
      force = get_archetype (FORCE_NAME);
      force->subtype = FORCE_CHANGE_ABILITY;
      if (spell_ob->race)
        force->name = spell_ob->race;
      else
        force->name = spell_ob->name;
      force->name_pl = spell_ob->name;
      new_draw_info (NDI_UNIQUE, 0, op, "You create an aura of magical force.");

    }
  else
    {
      int duration;

      duration = spell_ob->duration + SP_level_duration_adjust (caster, spell_ob) * 50;
      if (duration > force->duration)
        {
          force->duration = duration;
          new_draw_info (NDI_UNIQUE, 0, op, "You recast the spell while in effect.");
        }
      else
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Recasting the spell had no effect.");
        }
      return 1;
    }
  force->duration = spell_ob->duration + SP_level_duration_adjust (caster, spell_ob) * 50;
  force->speed = 1.0;
  force->speed_left = -1.0;
  SET_FLAG (force, FLAG_APPLIED);

  /* Now start processing the effects.  First, protections */
  for (i = 0; i < NROFATTACKS; i++)
    {
      if (spell_ob->resist[i])
        {
          force->resist[i] = spell_ob->resist[i] + SP_level_dam_adjust (caster, spell_ob);
          if (force->resist[i] > 100)
            force->resist[i] = 100;
        }
    }
  if (spell_ob->stats.hp)
    force->stats.hp = spell_ob->stats.hp + SP_level_dam_adjust (caster, spell_ob);

  if (tmp->type == PLAYER)
    {
      /* Stat adjustment spells */
      for (i = 0; i < NUM_STATS; i++)
        {
          sint8 stat = get_attr_value (&spell_ob->stats, i), k, sm;

          if (stat)
            {
              sm = 0;
              for (k = 0; k < stat; k++)
                sm += rndm (1, 3);

              if ((get_attr_value (&tmp->stats, i) + sm) > (15 + 5 * stat))
                {
                  sm = (15 + 5 * stat) - get_attr_value (&tmp->stats, i);
                  if (sm < 0)
                    sm = 0;
                }
              set_attr_value (&force->stats, i, sm);
              if (!sm)
                new_draw_info (NDI_UNIQUE, 0, op, no_gain_msgs[i]);
            }
        }
    }

  force->move_type = spell_ob->move_type;

  if (QUERY_FLAG (spell_ob, FLAG_SEE_IN_DARK))
    SET_FLAG (force, FLAG_SEE_IN_DARK);

  if (QUERY_FLAG (spell_ob, FLAG_XRAYS))
    SET_FLAG (force, FLAG_XRAYS);

  /* Haste/bonus speed */
  if (spell_ob->stats.exp)
    {
      if (op->speed > 0.5f)
        force->stats.exp = (sint64) ((float) spell_ob->stats.exp / (op->speed + 0.5f));
      else
        force->stats.exp = spell_ob->stats.exp;
    }

  force->stats.wc = spell_ob->stats.wc;
  force->stats.ac = spell_ob->stats.ac;
  force->attacktype = spell_ob->attacktype;

  insert_ob_in_ob (force, tmp);
  change_abil (tmp, force);     /* Mostly to display any messages */
  tmp->update_stats ();
  return 1;
}

/* This used to be part of cast_change_ability, but it really didn't make
 * a lot of sense, since most of the values it derives are from the god
 * of the caster.
 */

int
cast_bless (object *op, object *caster, object *spell_ob, int dir)
{
  int i;
  object *god = find_god (determine_god (op)), *tmp2, *force = NULL, *tmp;

  /* if dir = 99 op defaults to tmp, eat_special_food() requires this. */
  if (dir != 0)
    {
      tmp = find_target_for_friendly_spell (op, dir);
    }
  else
    {
      tmp = op;
    }

  /* If we've already got a force of this type, don't add a new one. */
  for (tmp2 = tmp->inv; tmp2 != NULL; tmp2 = tmp2->below)
    {
      if (tmp2->type == FORCE && tmp2->subtype == FORCE_CHANGE_ABILITY)
        {
          if (tmp2->name == spell_ob->name)
            {
              force = tmp2;     /* the old effect will be "refreshed" */
              break;
            }
          else if (spell_ob->race && spell_ob->race == tmp2->name)
            {
              new_draw_info_format (NDI_UNIQUE, 0, op, "You can not cast %s while %s is in effect", &spell_ob->name, &tmp2->name_pl);
              return 0;
            }
        }
    }
  if (force == NULL)
    {
      force = get_archetype (FORCE_NAME);
      force->subtype = FORCE_CHANGE_ABILITY;
      if (spell_ob->race)
        force->name = spell_ob->race;
      else
        force->name = spell_ob->name;
      force->name_pl = spell_ob->name;
      new_draw_info (NDI_UNIQUE, 0, op, "You create an aura of magical force.");
    }
  else
    {
      int duration;

      duration = spell_ob->duration + SP_level_duration_adjust (caster, spell_ob) * 50;
      if (duration > force->duration)
        {
          force->duration = duration;
          new_draw_info (NDI_UNIQUE, 0, op, "You recast the spell while in effect.");
        }
      else
        {
          new_draw_info (NDI_UNIQUE, 0, op, "Recasting the spell had no effect.");
        }
      return 0;
    }
  force->duration = spell_ob->duration + SP_level_duration_adjust (caster, spell_ob) * 50;
  force->speed = 1.0;
  force->speed_left = -1.0;
  SET_FLAG (force, FLAG_APPLIED);

  if (!god)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Your blessing seems empty.");
    }
  else
    {
      /* Only give out good benefits, and put a max on it */
      for (i = 0; i < NROFATTACKS; i++)
        {
          if (god->resist[i] > 0)
            {
              force->resist[i] = MIN (god->resist[i], spell_ob->resist[ATNR_GODPOWER]);
            }
        }
      force->path_attuned |= god->path_attuned;

      if (spell_ob->attacktype)
        force->slaying = god->slaying;

      if (tmp != op)
        {
          new_draw_info_format (NDI_UNIQUE, 0, op, "You bless %s.", &tmp->name);
          new_draw_info_format (NDI_UNIQUE, 0, tmp, "%s blessed you.", &op->name);
        }
      else
        {
          new_draw_info_format (NDI_UNIQUE, 0, tmp, "You are blessed by %s!", &god->name);
        }

    }
  force->stats.wc = spell_ob->stats.wc;
  force->stats.ac = spell_ob->stats.ac;

  change_abil (tmp, force);     /* Mostly to display any messages */
  insert_ob_in_ob (force, tmp);
  tmp->update_stats ();
  return 1;
}


/* Alchemy code by Mark Wedel
 *
 * This code adds a new spell, called alchemy.  Alchemy will turn
 * objects to gold nuggets, the value of the gold nuggets being
 * about 90% of that of the item itself.  It uses the value of the
 * object before charisma adjustments, because the nuggets themselves
 * will be will be adjusted by charisma when sold.
 *
 * Large nuggets are worth 25 gp each (base).  You will always get
 * the maximum number of large nuggets you could get.
 * Small nuggets are worth 1 gp each (base).  You will get from 0
 * to the max amount of small nuggets as you could get.
 *
 * For example, if an item is worth 110 gold, you will get
 * 4 large nuggets, and from 0-10 small nuggets.
 *
 * There is also a chance (1:30) that you will get nothing at all
 * for the object.  There is also a maximum weight that will be
 * alchemied.
 */

/* I didn't feel like passing these as arguements to the
 * two functions that need them.  Real values are put in them
 * when the spell is cast, and these are freed when the spell
 * is finished.
 */
static object *small, *large;

static void
alchemy_object (object *obj, int *small_nuggets, int *large_nuggets, int *weight)
{
  uint64 value = query_cost (obj, NULL, F_TRUE);

  /* Give third price when we alchemy money (This should hopefully
   * make it so that it isn't worth it to alchemy money, sell
   * the nuggets, alchemy the gold from that, etc.
   * Otherwise, give 9 silver on the gold for other objects,
   * so that it would still be more affordable to haul
   * the stuff back to town.
   */

  if (QUERY_FLAG (obj, FLAG_UNPAID))
    value = 0;
  else if (obj->type == MONEY || obj->type == GEM)
    value /= 3;
  else
    value = (value * 9) / 10;

  value /= 4;                   // fix by GHJ, don't understand, pcg

  if ((obj->value > 0) && rndm (0, 29))
    {
      int count;

      count = value / large->value;
      *large_nuggets += count;
      value -= (uint64) count *(uint64) large->value;

      count = value / small->value;
      *small_nuggets += count;
    }

  /* Turn 25 small nuggets into 1 large nugget.  If the value
   * of large nuggets is not evenly divisable by the small nugget
   * value, take off an extra small_nugget (Assuming small_nuggets!=0)
   */
  if (*small_nuggets * small->value >= large->value)
    {
      (*large_nuggets)++;
      *small_nuggets -= large->value / small->value;
      if (*small_nuggets && large->value % small->value)
        (*small_nuggets)--;
    }
  weight += obj->weight;
  obj->destroy ();
}

static void
update_map (object *op, maptile *m, int small_nuggets, int large_nuggets, int x, int y)
{
  object *tmp;
  int flag = 0;

  /* Put any nuggets below the player, but we can only pass this
   * flag if we are on the same space as the player 
   */
  if (x == op->x && y == op->y && op->map == m)
    flag = INS_BELOW_ORIGINATOR;

  if (small_nuggets)
    {
      tmp = small->clone ();
      tmp->nrof = small_nuggets;
      m->insert (tmp, x, y, op, flag);
    }

  if (large_nuggets)
    {
      tmp = large->clone ();
      tmp->nrof = large_nuggets;
      m->insert (tmp, x, y, op, flag);
    }
}

int
alchemy (object *op, object *caster, object *spell_ob)
{
  int x, y, weight = 0, weight_max, large_nuggets, small_nuggets, mflags;
  sint16 nx, ny;
  object *next, *tmp;
  maptile *mp;

  if (op->type != PLAYER)
    return 0;

  /* Put a maximum weight of items that can be alchemied.  Limits the power
   * some, and also prevents people from alcheming every table/chair/clock
   * in sight
   */
  weight_max = spell_ob->duration + +SP_level_duration_adjust (caster, spell_ob);
  weight_max *= 1000;
  small = get_archetype ("smallnugget"), large = get_archetype ("largenugget");

  for (y = op->y - 1; y <= op->y + 1; y++)
    {
      for (x = op->x - 1; x <= op->x + 1; x++)
        {
          nx = x;
          ny = y;

          mp = op->map;

          mflags = get_map_flags (mp, &mp, nx, ny, &nx, &ny);

          if (mflags & (P_OUT_OF_MAP | P_NO_MAGIC))
            continue;

          /* Treat alchemy a little differently - most spell effects
           * use fly as the movement type - for alchemy, consider it
           * ground level effect.
           */
          if (GET_MAP_MOVE_BLOCK (mp, nx, ny) & MOVE_WALK)
            continue;

          small_nuggets = 0;
          large_nuggets = 0;

          for (tmp = GET_MAP_OB (mp, nx, ny); tmp != NULL; tmp = next)
            {
              next = tmp->above;
              if (tmp->weight > 0 && !QUERY_FLAG (tmp, FLAG_NO_PICK) &&
                  !QUERY_FLAG (tmp, FLAG_ALIVE) && !QUERY_FLAG (tmp, FLAG_IS_CAULDRON))
                {

                  if (tmp->inv)
                    {
                      object *next1, *tmp1;

                      for (tmp1 = tmp->inv; tmp1 != NULL; tmp1 = next1)
                        {
                          next1 = tmp1->below;
                          if (tmp1->weight > 0 && !QUERY_FLAG (tmp1, FLAG_NO_PICK) &&
                              !QUERY_FLAG (tmp1, FLAG_ALIVE) && !QUERY_FLAG (tmp1, FLAG_IS_CAULDRON))
                            alchemy_object (tmp1, &small_nuggets, &large_nuggets, &weight);
                        }
                    }
                  alchemy_object (tmp, &small_nuggets, &large_nuggets, &weight);

                  if (weight > weight_max)
                    {
                      update_map (op, mp, small_nuggets, large_nuggets, nx, ny);
                      large->destroy ();
                      small->destroy ();
                      return 1;
                    }
                }               /* is alchemable object */
            }                   /* process all objects on this space */

          /* Insert all the nuggets at one time.  This probably saves time, but
           * it also prevents us from alcheming nuggets that were just created
           * with this spell.
           */
          update_map (op, mp, small_nuggets, large_nuggets, nx, ny);
        }
    }

  large->destroy ();
  small->destroy ();
  /* reset this so that if player standing on a big pile of stuff,
   * it is redrawn properly.
   */
  op->contr->ns->look_position = 0;
  return 1;
}


/* This function removes the cursed/damned status on equipped
 * items.
 */
int
remove_curse (object *op, object *caster, object *spell)
{
  object *tmp;
  int success = 0, was_one = 0;

  for (tmp = op->inv; tmp; tmp = tmp->below)
    if (QUERY_FLAG (tmp, FLAG_APPLIED) &&
        ((QUERY_FLAG (tmp, FLAG_CURSED) && QUERY_FLAG (spell, FLAG_CURSED)) ||
         (QUERY_FLAG (tmp, FLAG_DAMNED) && QUERY_FLAG (spell, FLAG_DAMNED))))
      {
        was_one++;
        if (tmp->level <= caster_level (caster, spell))
          {
            success++;
            if (QUERY_FLAG (spell, FLAG_DAMNED))
              CLEAR_FLAG (tmp, FLAG_DAMNED);

            CLEAR_FLAG (tmp, FLAG_CURSED);
            CLEAR_FLAG (tmp, FLAG_KNOWN_CURSED);
            tmp->value = 0;     /* Still can't sell it */
            if (op->type == PLAYER)
              esrv_send_item (op, tmp);
          }
      }

  if (op->type == PLAYER)
    {
      if (success)
        {
          new_draw_info (NDI_UNIQUE, 0, op, "You feel like some of your items are looser now.");
        }
      else
        {
          if (was_one)
            new_draw_info (NDI_UNIQUE, 0, op, "You failed to remove the curse.");
          else
            new_draw_info (NDI_UNIQUE, 0, op, "You are not using any cursed items.");
        }
    }

  return success;
}

/* Identifies objects in the players inventory/on the ground */

int
cast_identify (object *op, object *caster, object *spell)
{
  object *tmp;
  int success = 0, num_ident;

  num_ident = spell->stats.dam + SP_level_dam_adjust (caster, spell);

  if (num_ident < 1)
    num_ident = 1;

  for (tmp = op->inv; tmp; tmp = tmp->below)
    {
      if (!QUERY_FLAG (tmp, FLAG_IDENTIFIED) && !tmp->invisible && need_identify (tmp))
        {
          identify (tmp);

          if (op->type == PLAYER)
            {
              new_draw_info_format (NDI_UNIQUE, 0, op, "You have %s.", long_desc (tmp, op));

              if (tmp->msg)
                {
                  new_draw_info (NDI_UNIQUE, 0, op, "The item has a story:");
                  new_draw_info (NDI_UNIQUE, 0, op, tmp->msg);
                }
            }

          num_ident--;
          success = 1;
          if (!num_ident)
            break;
        }
    }

  /* If all the power of the spell has been used up, don't go and identify
   * stuff on the floor.  Only identify stuff on the floor if the spell
   * was not fully used.
   */
  if (num_ident)
    {
      for (tmp = GET_MAP_OB (op->map, op->x, op->y); tmp != NULL; tmp = tmp->above)
        if (!QUERY_FLAG (tmp, FLAG_IDENTIFIED) && !tmp->invisible && need_identify (tmp))
          {
            identify (tmp);

            if (op->type == PLAYER)
              {
                new_draw_info_format (NDI_UNIQUE, 0, op, "On the ground is %s.", long_desc (tmp, op));

                if (tmp->msg)
                  {
                    new_draw_info (NDI_UNIQUE, 0, op, "The item has a story:");
                    new_draw_info (NDI_UNIQUE, 0, op, tmp->msg);
                  }

                esrv_send_item (op, tmp);
              }

            num_ident--;
            success = 1;
            if (!num_ident)
              break;
          }
    }

  if (!success)
    new_draw_info (NDI_UNIQUE, 0, op, "You can't reach anything unidentified.");
  else
    spell_effect (spell, op->x, op->y, op->map, op);

  return success;
}

int
cast_detection (object *op, object *caster, object *spell, object *skill)
{
  object *tmp, *last, *god, *detect;
  int done_one, range, mflags, floor, level;
  sint16 x, y, nx, ny;
  maptile *m;

  /* We precompute some values here so that we don't have to keep
   * doing it over and over again.
   */
  god = find_god (determine_god (op));
  level = caster_level (caster, spell);
  range = spell->range + SP_level_range_adjust (caster, spell);

  if (!skill)
    skill = caster;

  for (x = op->x - range; x <= op->x + range; x++)
    for (y = op->y - range; y <= op->y + range; y++)
      {
        m = op->map;
        mflags = get_map_flags (m, &m, x, y, &nx, &ny);
        if (mflags & P_OUT_OF_MAP)
          continue;

        /* For most of the detections, we only detect objects above the
         * floor.  But this is not true for show invisible.
         * Basically, we just go and find the top object and work
         * down - that is easier than working up.
         */

        for (last = NULL, tmp = GET_MAP_OB (m, nx, ny); tmp; tmp = tmp->above)
          last = tmp;

        /* Shouldn't happen, but if there are no objects on a space, this
         * would happen.
         */
        if (!last)
          continue;

        done_one = 0;
        floor = 0;
        detect = NULL;
        for (tmp = last; tmp; tmp = tmp->below)
          {
            /* show invisible */
            if (QUERY_FLAG (spell, FLAG_MAKE_INVIS) &&
                /* Might there be other objects that we can make visible? */
                (tmp->invisible && (QUERY_FLAG (tmp, FLAG_MONSTER) ||
                                    (tmp->type == PLAYER && !QUERY_FLAG (tmp, FLAG_WIZ)) ||
                                    tmp->type == CF_HANDLE ||
                                    tmp->type == TRAPDOOR || tmp->type == EXIT || tmp->type == HOLE ||
                                    tmp->type == BUTTON || tmp->type == TELEPORTER ||
                                    tmp->type == GATE || tmp->type == LOCKED_DOOR ||
                                    tmp->type == WEAPON || tmp->type == ALTAR || tmp->type == SIGN ||
                                    tmp->type == TRIGGER_PEDESTAL || tmp->type == SPECIAL_KEY ||
                                    tmp->type == TREASURE || tmp->type == BOOK || tmp->type == HOLY_ALTAR)))
              {
                if (random_roll (0, skill->level - 1, op, PREFER_HIGH) > level / 4)
                  {
                    tmp->invisible = 0;
                    done_one = 1;
                  }
              }

            if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
              floor = 1;

            /* All detections below this point don't descend beneath the floor,
             * so just continue on.  We could be clever and look at the type of
             * detection to completely break out if we don't care about objects beneath
             * the floor, but once we get to the floor, not likely a very big issue anyways.
             */
            if (floor)
              continue;

            /* I had thought about making detect magic and detect curse
             * show the flash the magic item like it does for detect monster.
             * however, if the object is within sight, this would then make it
             * difficult to see what object is magical/cursed, so the
             * effect wouldn't be as apparant.
             */

            /* detect magic */
            if (QUERY_FLAG (spell, FLAG_KNOWN_MAGICAL) &&
                !QUERY_FLAG (tmp, FLAG_KNOWN_MAGICAL) && !QUERY_FLAG (tmp, FLAG_IDENTIFIED) && is_magical (tmp))
              {
                SET_FLAG (tmp, FLAG_KNOWN_MAGICAL);
                /* make runes more visibile */
                if (tmp->type == RUNE && tmp->attacktype & AT_MAGIC)
                  tmp->stats.Cha /= 4;
                done_one = 1;
              }
            /* detect monster */
            if (QUERY_FLAG (spell, FLAG_MONSTER) && (QUERY_FLAG (tmp, FLAG_MONSTER) || tmp->type == PLAYER))
              {
                done_one = 2;
                if (!detect)
                  detect = tmp;
              }
            /* Basically, if race is set in the spell, then the creatures race must
             * match that.  if the spell race is set to GOD, then the gods opposing
             * race must match.
             */
            if (spell->race && QUERY_FLAG (tmp, FLAG_MONSTER) && tmp->race &&
                ((!strcmp (spell->race, "GOD") && god && god->slaying && strstr (god->slaying, tmp->race)) ||
                 (strstr (spell->race, tmp->race))))
              {
                done_one = 2;
                if (!detect)
                  detect = tmp;
              }
            if (QUERY_FLAG (spell, FLAG_KNOWN_CURSED) && !QUERY_FLAG (tmp, FLAG_KNOWN_CURSED) &&
                (QUERY_FLAG (tmp, FLAG_CURSED) || QUERY_FLAG (tmp, FLAG_DAMNED)))
              {
                SET_FLAG (tmp, FLAG_KNOWN_CURSED);
                done_one = 1;
              }
          }                     /* for stack of objects on this space */

        /* Code here puts an effect of the spell on the space, so you can see
         * where the magic is.
         */
        if (done_one)
          {
            object *detect_ob = arch_to_object (spell->other_arch);

            /* if this is set, we want to copy the face */
            if (done_one == 2 && detect)
              {
                detect_ob->face = detect->face;
                detect_ob->animation_id = detect->animation_id;
                detect_ob->anim_speed = detect->anim_speed;
                detect_ob->last_anim = 0;
                /* by default, the detect_ob is already animated */
                if (!QUERY_FLAG (detect, FLAG_ANIMATE))
                  CLEAR_FLAG (detect_ob, FLAG_ANIMATE);
              }

            m->insert (detect_ob, nx, ny, op);
          }
      }                         /* for processing the surrounding spaces */


  /* Now process objects in the players inventory if detect curse or magic */
  if (QUERY_FLAG (spell, FLAG_KNOWN_CURSED) || QUERY_FLAG (spell, FLAG_KNOWN_MAGICAL))
    {
      done_one = 0;
      for (tmp = op->inv; tmp; tmp = tmp->below)
        {
          if (!tmp->invisible && !QUERY_FLAG (tmp, FLAG_IDENTIFIED))
            {
              if (QUERY_FLAG (spell, FLAG_KNOWN_MAGICAL) && is_magical (tmp) && !QUERY_FLAG (tmp, FLAG_KNOWN_MAGICAL))
                {
                  SET_FLAG (tmp, FLAG_KNOWN_MAGICAL);
                  if (op->type == PLAYER)
                    esrv_send_item (op, tmp);
                }
              if (QUERY_FLAG (spell, FLAG_KNOWN_CURSED) && !QUERY_FLAG (tmp, FLAG_KNOWN_CURSED) &&
                  (QUERY_FLAG (tmp, FLAG_CURSED) || QUERY_FLAG (tmp, FLAG_DAMNED)))
                {
                  SET_FLAG (tmp, FLAG_KNOWN_CURSED);
                  if (op->type == PLAYER)
                    esrv_send_item (op, tmp);
                }
            }                   /* if item is not identified */
        }                       /* for the players inventory */
    }                           /* if detect magic/curse and object is a player */
  return 1;
}


/**
 * Checks if victim has overcharged mana. caster_level is the caster's (skill)
 * level whos spell did cause the overcharge.
 */
static void
charge_mana_effect (object *victim, int caster_level)
{

  /* Prevent explosions for objects without mana. Without this check, doors
   * will explode, too.
   */
  if (victim->stats.maxsp <= 0)
    return;

  new_draw_info (NDI_UNIQUE, 0, victim, "You feel energy course through you.");

  if (victim->stats.sp >= victim->stats.maxsp * 2)
    {
      object *tmp;

      new_draw_info (NDI_UNIQUE, 0, victim, "Your head explodes!");

      /* Explodes a fireball centered at player */
      tmp = get_archetype (EXPLODING_FIREBALL);
      tmp->dam_modifier = random_roll (1, caster_level, victim, PREFER_LOW) / 5 + 1;
      tmp->stats.maxhp = random_roll (1, caster_level, victim, PREFER_LOW) / 10 + 2;

      tmp->insert_at (victim);
      victim->stats.sp = 2 * victim->stats.maxsp;
    }
  else if (victim->stats.sp >= victim->stats.maxsp * 1.88)
    new_draw_info (NDI_UNIQUE, NDI_ORANGE, victim, "You feel like your head is going to explode.");
  else if (victim->stats.sp >= victim->stats.maxsp * 1.66)
    new_draw_info (NDI_UNIQUE, 0, victim, "You get a splitting headache!");
  else if (victim->stats.sp >= victim->stats.maxsp * 1.5)
    {
      new_draw_info (NDI_UNIQUE, 0, victim, "Chaos fills your world.");
      confuse_player (victim, victim, 99);
    }
  else if (victim->stats.sp >= victim->stats.maxsp * 1.25)
    new_draw_info (NDI_UNIQUE, 0, victim, "You start hearing voices.");
}

/* cast_transfer
 * This spell transfers sp from the player to another person.
 * We let the target go above their normal maximum SP.
 */

int
cast_transfer (object *op, object *caster, object *spell, int dir)
{
  object *plyr = NULL;
  sint16 x, y;
  maptile *m;
  int mflags;

  m = op->map;
  x = op->x + freearr_x[dir];
  y = op->y + freearr_y[dir];

  mflags = get_map_flags (m, &m, x, y, &x, &y);

  if (!(mflags & P_OUT_OF_MAP) && mflags & P_IS_ALIVE)
    {
      for (plyr = GET_MAP_OB (m, x, y); plyr != NULL; plyr = plyr->above)
        if (plyr != op && QUERY_FLAG (plyr, FLAG_ALIVE))
          break;
    }


  /* If we did not find a player in the specified direction, transfer
   * to anyone on top of us. This is used for the rune of transference mostly.
   */
  if (plyr == NULL)
    for (plyr = GET_MAP_OB (op->map, op->x, op->y); plyr != NULL; plyr = plyr->above)
      if (plyr != op && QUERY_FLAG (plyr, FLAG_ALIVE))
        break;

  if (!plyr)
    {
      new_draw_info (NDI_BLACK, 0, op, "There is no one there.");
      return 0;
    }
  /* give sp */
  if (spell->stats.dam > 0)
    {
      plyr->stats.sp += spell->stats.dam + SP_level_dam_adjust (caster, spell);
      charge_mana_effect (plyr, caster_level (caster, spell));
      return 1;
    }
  /* suck sp away.  Can't suck sp from yourself */
  else if (op != plyr)
    {
      /* old dragin magic used floats.  easier to just use ints and divide by 100 */

      int rate = -spell->stats.dam + SP_level_dam_adjust (caster, spell), sucked;

      if (rate > 95)
        rate = 95;

      sucked = (plyr->stats.sp * rate) / 100;
      plyr->stats.sp -= sucked;
      if (QUERY_FLAG (op, FLAG_ALIVE))
        {
          /* Player doesn't get full credit */
          sucked = (sucked * rate) / 100;
          op->stats.sp += sucked;
          if (sucked > 0)
            {
              charge_mana_effect (op, caster_level (caster, spell));
            }
        }
      return 1;
    }
  return 0;
}


/* counterspell:  nullifies spell effects.
 * op is the counterspell object, dir is the direction
 * it was cast in.
 * Basically, if the object has a magic attacktype,
 * this may nullify it.
 */
void
counterspell (object *op, int dir)
{
  object *tmp, *head, *next;
  int mflags;
  maptile *m;
  sint16 sx, sy;

  sx = op->x + freearr_x[dir];
  sy = op->y + freearr_y[dir];
  m = op->map;
  mflags = get_map_flags (m, &m, sx, sy, &sx, &sy);
  if (mflags & P_OUT_OF_MAP)
    return;

  for (tmp = GET_MAP_OB (m, sx, sy); tmp != NULL; tmp = next)
    {
      next = tmp->above;

      /* Need to look at the head object - otherwise, if tmp
       * points to a monster, we don't have all the necessary
       * info for it.
       */
      if (tmp->head)
        head = tmp->head;
      else
        head = tmp;

      /* don't attack our own spells */
      if (tmp->owner && tmp->owner == op->owner)
        continue;

      /* Basically, if the object is magical and not counterspell, 
       * we will more or less remove the object.  Don't counterspell
       * monsters either. 
       */

      if (head->attacktype & AT_MAGIC &&
          !(head->attacktype & AT_COUNTERSPELL) && !QUERY_FLAG (head, FLAG_MONSTER) && (op->level > head->level))
        head->destroy ();
      else
        switch (head->type)
          {
              case SPELL_EFFECT:
                if (op->level > head->level)
                  head->destroy ();

                break;

                /* I really don't get this rune code that much - that
                 * random chance seems really low.
                 */
              case RUNE:
                if (rndm (0, 149) == 0)
                  {
                    head->stats.hp--;   /* weaken the rune */
                    if (!head->stats.hp)
                      head->destroy ();
                  }
                break;
          }
    }
}


/* cast_consecrate() - a spell to make an altar your god's */
int
cast_consecrate (object *op, object *caster, object *spell)
{
  char buf[MAX_BUF];

  object *tmp, *god = find_god (determine_god (op));

  if (!god)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You can't consecrate anything if you don't worship a god!");
      return 0;
    }

  for (tmp = op->below; tmp; tmp = tmp->below)
    {
      if (QUERY_FLAG (tmp, FLAG_IS_FLOOR))
        break;
      if (tmp->type == HOLY_ALTAR)
        {

          if (tmp->level > caster_level (caster, spell))
            {
              new_draw_info_format (NDI_UNIQUE, 0, op, "You are not powerful enough to reconsecrate the %s", &tmp->name);
              return 0;
            }
          else
            {
              /* If we got here, we are consecrating an altar */
              sprintf (buf, "Altar of %s", &god->name);
              tmp->name = buf;
              tmp->level = caster_level (caster, spell);
              tmp->other_arch = god->arch;
              if (op->type == PLAYER)
                esrv_update_item (UPD_NAME, op, tmp);
              new_draw_info_format (NDI_UNIQUE, 0, op, "You consecrated the altar to %s!", &god->name);
              return 1;
            }
        }
    }
  new_draw_info (NDI_UNIQUE, 0, op, "You are not standing over an altar!");
  return 0;
}

/* animate_weapon - 
 * Generalization of staff_to_snake.  Makes a golem out of the caster's weapon.
 * The golem is based on the archetype specified, modified by the caster's level
 * and the attributes of the weapon.  The weapon is inserted in the golem's 
 * inventory so that it falls to the ground when the golem dies.
 * This code was very odd - code early on would only let players use the spell,
 * yet the code wass full of player checks.  I've presumed that the code
 * that only let players use it was correct, and removed all the other
 * player checks. MSW 2003-01-06
 */

int
animate_weapon (object *op, object *caster, object *spell, int dir)
{
  object *weapon, *tmp;
  char buf[MAX_BUF];
  int a, i;
  sint16 x, y;
  maptile *m;
  materialtype_t *mt;

  if (!spell->other_arch)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Oops, program error!");
      LOG (llevError, "animate_weapon failed: spell %s missing other_arch!\n", &spell->name);
      return 0;
    }
  /* exit if it's not a player using this spell. */
  if (op->type != PLAYER)
    return 0;

  /* if player already has a golem, abort */
  if (op->contr->ranges[range_golem])
    {
      control_golem (op->contr->ranges[range_golem], dir);
      return 0;
    }

  /* if no direction specified, pick one */
  if (!dir)
    dir = find_free_spot (NULL, op->map, op->x, op->y, 1, 9);

  m = op->map;
  x = op->x + freearr_x[dir];
  y = op->y + freearr_y[dir];

  /* if there's no place to put the golem, abort */
  if ((dir == -1) || (get_map_flags (m, &m, x, y, &x, &y) & P_OUT_OF_MAP) ||
      ((spell->other_arch->clone.move_type & GET_MAP_MOVE_BLOCK (m, x, y)) == spell->other_arch->clone.move_type))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "There is something in the way.");
      return 0;
    }

  /* Use the weapon marked by the player. */
  weapon = find_marked_object (op);

  if (!weapon)
    {
      new_draw_info (NDI_BLACK, 0, op, "You must mark a weapon to use with this spell!");
      return 0;
    }
  if (spell->race && strcmp (weapon->arch->name, spell->race))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "The spell fails to transform your weapon.");
      return 0;
    }
  if (weapon->type != WEAPON)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "You need to wield a weapon to animate it.");
      return 0;
    }
  if (QUERY_FLAG (weapon, FLAG_APPLIED))
    {
      new_draw_info_format (NDI_BLACK, 0, op, "You need to unequip %s before using it in this spell", query_name (weapon));
      return 0;
    }

  if (weapon->nrof > 1)
    {
      tmp = get_split_ob (weapon, 1);
      esrv_send_item (op, weapon);
      weapon = tmp;
    }

  /* create the golem object */
  tmp = arch_to_object (spell->other_arch);

  /* if animated by a player, give the player control of the golem */
  CLEAR_FLAG (tmp, FLAG_MONSTER);
  SET_FLAG (tmp, FLAG_FRIENDLY);
  tmp->stats.exp = 0;
  add_friendly_object (tmp);
  tmp->type = GOLEM;
  tmp->set_owner (op);
  set_spell_skill (op, caster, spell, tmp);
  op->contr->ranges[range_golem] = tmp;
  op->contr->shoottype = range_golem;

  /* Give the weapon to the golem now.  A bit of a hack to check the
   * removed flag - it should only be set if get_split_object was
   * used above.
   */
  if (!QUERY_FLAG (weapon, FLAG_REMOVED))
    weapon->remove ();
  insert_ob_in_ob (weapon, tmp);
  esrv_send_item (op, weapon);
  /* To do everything necessary to let a golem use the weapon is a pain,
   * so instead, just set it as equipped (otherwise, we need to update
   * body_info, skills, etc)
   */
  SET_FLAG (tmp, FLAG_USE_WEAPON);
  SET_FLAG (weapon, FLAG_APPLIED);
  tmp->update_stats ();

  /* There used to be 'odd' code that basically seemed to take the absolute
   * value of the weapon->magic an use that.  IMO, that doesn't make sense -
   * if you're using a crappy weapon, it shouldn't be as good.
   */

  /* modify weapon's animated wc */
  tmp->stats.wc = tmp->stats.wc - SP_level_range_adjust (caster, spell) - 5 * weapon->stats.Dex - 2 * weapon->stats.Str - weapon->magic;
  if (tmp->stats.wc < -127)
    tmp->stats.wc = -127;

  /* Modify hit points for weapon */
  tmp->stats.maxhp = tmp->stats.maxhp + spell->duration +
    SP_level_duration_adjust (caster, spell) + +8 * weapon->magic + 12 * weapon->stats.Con;
  if (tmp->stats.maxhp < 0)
    tmp->stats.maxhp = 10;
  tmp->stats.hp = tmp->stats.maxhp;

  /* Modify weapon's damage */
  tmp->stats.dam = spell->stats.dam + SP_level_dam_adjust (caster, spell) + weapon->stats.dam + weapon->magic + 5 * weapon->stats.Str;
  if (tmp->stats.dam < 0)
    tmp->stats.dam = 127;


  /* attacktype */
  if (!tmp->attacktype)
    tmp->attacktype = AT_PHYSICAL;

  mt = NULL;
  if (op->materialname != NULL)
    mt = name_to_material (op->materialname);
  if (mt != NULL)
    {
      for (i = 0; i < NROFATTACKS; i++)
        tmp->resist[i] = 50 - (mt->save[i] * 5);
      a = mt->save[0];
    }
  else
    {
      for (i = 0; i < NROFATTACKS; i++)
        tmp->resist[i] = 5;
      a = 10;
    }
  /* Set weapon's immunity */
  tmp->resist[ATNR_CONFUSION] = 100;
  tmp->resist[ATNR_POISON] = 100;
  tmp->resist[ATNR_SLOW] = 100;
  tmp->resist[ATNR_PARALYZE] = 100;
  tmp->resist[ATNR_TURN_UNDEAD] = 100;
  tmp->resist[ATNR_FEAR] = 100;
  tmp->resist[ATNR_DEPLETE] = 100;
  tmp->resist[ATNR_DEATH] = 100;
  tmp->resist[ATNR_BLIND] = 100;

  /* Improve weapon's armour value according to best save vs. physical of its material */

  if (a > 14)
    a = 14;
  tmp->resist[ATNR_PHYSICAL] = 100 - (int) ((100.0 - (float) tmp->resist[ATNR_PHYSICAL]) / (30.0 - 2.0 * a));

  /* Determine golem's speed */
  tmp->set_speed (min (3.33, 0.4 + 0.1 * SP_level_range_adjust (caster, spell)));

  if (!spell->race)
    {
      sprintf (buf, "animated %s", &weapon->name);
      tmp->name = buf;

      tmp->face = weapon->face;
      tmp->animation_id = weapon->animation_id;
      tmp->anim_speed = weapon->anim_speed;
      tmp->last_anim = weapon->last_anim;
      tmp->state = weapon->state;
      tmp->flag [FLAG_ANIMATE] = weapon->flag [FLAG_ANIMATE];
    }

  /*  make experience increase in proportion to the strength of the summoned creature. */
  tmp->stats.exp *= 1 + (MAX (spell->stats.maxgrace, spell->stats.sp) / caster_level (caster, spell));

  tmp->speed_left = -1;
  tmp->direction = dir;

  m->insert (tmp, x, y, op);
  return 1;
}

/* cast_daylight() - changes the map darkness level *lower* */

/* cast_change_map_lightlevel: Was cast_daylight/nightfall.
 * This changes the light level for the entire map.
 */

int
cast_change_map_lightlevel (object *op, object *caster, object *spell)
{
  int success;

  if (!op->map)
    return 0;                   /* shouldnt happen */

  success = op->map->change_map_light (spell->stats.dam);

  if (!success)
    {
      if (spell->stats.dam < 0)
        new_draw_info (NDI_UNIQUE, 0, op, "It can be no brighter here.");
      else
        new_draw_info (NDI_UNIQUE, 0, op, "It can be no darker here.");
    }
  return success;
}


/* create an aura spell object and put it in the player's inventory.
 * as usual, op is player, caster is the object casting the spell,
 * spell is the spell object itself.
 */
int
create_aura (object *op, object *caster, object *spell)
{
  int refresh = 0;
  object *new_aura;

  new_aura = present_arch_in_ob (spell->other_arch, op);
  if (new_aura)
    refresh = 1;
  else
    new_aura = arch_to_object (spell->other_arch);

  new_aura->duration = spell->duration + 10 * SP_level_duration_adjust (caster, spell);

  new_aura->stats.dam = spell->stats.dam + SP_level_dam_adjust (caster, spell);

  new_aura->set_owner (op);
  set_spell_skill (op, caster, spell, new_aura);
  new_aura->attacktype = spell->attacktype;

  new_aura->level = caster_level (caster, spell);
  if (refresh)
    new_draw_info (NDI_UNIQUE, 0, op, "You recast the spell while in effect.");
  else
    new_draw_info (NDI_UNIQUE, 0, op, "You create an aura of magical force.");
  insert_ob_in_ob (new_aura, op);
  return 1;
}


/* move aura function.  An aura is a part of someone's inventory,
 * which he carries with him, but which acts on the map immediately
 * around him.
 * Aura parameters:
 * duration:  duration counter.   
 * attacktype:  aura's attacktype 
 * other_arch:  archetype to drop where we attack
 */

void
move_aura (object *aura)
{
  int i, mflags;
  object *env;
  maptile *m;

  /* auras belong in inventories */
  env = aura->env;

  /* no matter what we've gotta remove the aura...
   * we'll put it back if its time isn't up.  
   */
  aura->remove ();

  /* exit if we're out of gas */
  if (aura->duration-- < 0)
    {
      aura->destroy ();
      return;
    }

  /* auras only exist in inventories */
  if (env == NULL || env->map == NULL)
    {
      aura->destroy ();
      return;
    }

  /* we need to jump out of the inventory for a bit
   * in order to hit the map conveniently. 
   */
  aura->insert_at (env, aura);

  for (i = 1; i < 9; i++)
    {
      sint16 nx, ny;

      nx = aura->x + freearr_x[i];
      ny = aura->y + freearr_y[i];
      mflags = get_map_flags (env->map, &m, nx, ny, &nx, &ny);

      /* Consider the movement tyep of the person with the aura as
       * movement type of the aura.  Eg, if the player is flying, the aura
       * is flying also, if player is walking, it is on the ground, etc.
       */
      if (!(mflags & P_OUT_OF_MAP) && !(OB_TYPE_MOVE_BLOCK (env, GET_MAP_MOVE_BLOCK (m, nx, ny))))
        {
          hit_map (aura, i, aura->attacktype, 0);

          if (aura->other_arch)
            m->insert (arch_to_object (aura->other_arch), nx, ny, aura);
        }
    }

  /* put the aura back in the player's inventory */
  aura->remove ();
  insert_ob_in_ob (aura, env);
}

/* moves the peacemaker spell.
 * op is the piece object.
 */

void
move_peacemaker (object *op)
{
  object *tmp;

  for (tmp = GET_MAP_OB (op->map, op->x, op->y); tmp != NULL; tmp = tmp->above)
    {
      int atk_lev, def_lev;
      object *victim = tmp;

      if (tmp->head)
        victim = tmp->head;
      if (!QUERY_FLAG (victim, FLAG_MONSTER))
        continue;
      if (QUERY_FLAG (victim, FLAG_UNAGGRESSIVE))
        continue;
      if (victim->stats.exp == 0)
        continue;

      def_lev = MAX (1, victim->level);
      atk_lev = MAX (1, op->level);

      if (rndm (0, atk_lev - 1) > def_lev)
        {
          /* make this sucker peaceful. */

          change_exp (op->owner, victim->stats.exp, op->skill, 0);
          victim->stats.exp = 0;
#if 0
          /* No idea why these were all set to zero - if something
           * makes this creature agressive, he should still do damage.
           */
          victim->stats.dam = 0;
          victim->stats.sp = 0;
          victim->stats.grace = 0;
          victim->stats.Pow = 0;
#endif
          victim->attack_movement = RANDO2;
          SET_FLAG (victim, FLAG_UNAGGRESSIVE);
          SET_FLAG (victim, FLAG_RUN_AWAY);
          SET_FLAG (victim, FLAG_RANDOM_MOVE);
          CLEAR_FLAG (victim, FLAG_MONSTER);
          if (victim->name)
            {
              new_draw_info_format (NDI_UNIQUE, 0, op->owner, "%s no longer feels like fighting.", &victim->name);
            }
        }
    }
}


/* This writes a rune that contains the appropriate message.
 * There really isn't any adjustments we make.
 */

int
write_mark (object *op, object *spell, const char *msg)
{
  char rune[HUGE_BUF];
  object *tmp;

  if (!msg || msg[0] == 0)
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Write what?");
      return 0;
    }

  if (strcasestr_local (msg, "endmsg"))
    {
      new_draw_info (NDI_UNIQUE, 0, op, "Trying to cheat are we?");
      LOG (llevInfo, "write_rune: player %s tried to write bogus rune %s\n", &op->name, msg);
      return 0;
    }
  if (!spell->other_arch)
    return 0;
  tmp = arch_to_object (spell->other_arch);

  snprintf (rune, sizeof (rune), "%s\n", msg);

  tmp->race = op->name;         /*Save the owner of the rune */
  tmp->msg = rune;

  tmp->insert_at (op, op, INS_BELOW_ORIGINATOR);
  return 1;
}
Revision:	1.32
Committed:	Sat Jan 6 14:42:31 2007 UTC (17 years, 5 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Changes since 1.31:	+1 -0 lines
Log Message:	added some copyrights