server/common/button.C

/*
 * CrossFire, A Multiplayer game
 * 
 * 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 <funcpoint.h>

/*
 * This code is no longer highly inefficient 8)
 */

/*
 * elmex:
 * This function takes a objectlink list with all the objects are going to be activated.
 * state is a true/false flag that will actiavte objects that have FLAG_ACTIVATE_ON_PUSH/RELEASE set.
 * The source argument can be 0 or the source object for this activation.
 */
void
activate_connection_link (objectlink * ol, bool state, object *source = 0)
{
  for (; ol; ol = ol->next)
    {
      if (!ol->ob)
        {
          LOG (llevError, "Internal error in activate_connection_link.\n");
          continue;
        }

      /* a button link object can become freed when the map is saving.  As
       * a map is saved, objects are removed and freed, and if an object is
       * on top of a button, this function is eventually called.  If a map
       * is getting moved out of memory, the status of buttons and levers
       * probably isn't important - it will get sorted out when the map is
       * re-loaded.  As such, just exit this function if that is the case.
       */

      if (QUERY_FLAG (ol->ob, FLAG_FREED))
        return;

      object *tmp = ol->ob;

      /* if the criteria isn't appropriate, don't do anything */
      if (state && !QUERY_FLAG (tmp, FLAG_ACTIVATE_ON_PUSH))
        continue;
      if (!state && !QUERY_FLAG (tmp, FLAG_ACTIVATE_ON_RELEASE))
        continue;

      switch (tmp->type)
        {
          case GATE:
          case HOLE:
            tmp->value = tmp->stats.maxsp ? !state : state;
            tmp->set_speed (0.5);
            break;

          case CF_HANDLE:
            SET_ANIMATION (tmp, (tmp->value = tmp->stats.maxsp ? !state : state));
            update_object (tmp, UP_OBJ_FACE);
            break;

          case SIGN:
            if (!tmp->stats.food || tmp->last_eat < tmp->stats.food)
              {
                new_info_map (NDI_UNIQUE | NDI_NAVY, tmp->map, tmp->msg);
                if (tmp->stats.food)
                  tmp->last_eat++;
              }
            break;

          case ALTAR:
            tmp->value = 1;
            SET_ANIMATION (tmp, tmp->value);
            update_object (tmp, UP_OBJ_FACE);
            break;

          case BUTTON:
          case PEDESTAL:
            tmp->value = state;
            SET_ANIMATION (tmp, tmp->value);
            update_object (tmp, UP_OBJ_FACE);
            break;

          case MOOD_FLOOR:
            do_mood_floor (tmp, source);
            break;

          case TIMED_GATE:
            tmp->set_speed (tmp->arch->clone.speed);
            tmp->value = tmp->arch->clone.value;
            tmp->stats.sp = 1;
            tmp->stats.hp = tmp->stats.maxhp;
            /* Handle multipart gates.  We copy the value for the other parts
             * from the head - this ensures that the data will consistent
             */
            for (tmp = tmp->more; tmp; tmp = tmp->more)
              {
                tmp->value = tmp->head->value;
                tmp->stats.sp = tmp->head->stats.sp;
                tmp->stats.hp = tmp->head->stats.hp;
                tmp->set_speed (tmp->head->speed);
              }
            break;

          case DIRECTOR:
          case FIREWALL:
            if (!QUERY_FLAG (tmp, FLAG_ANIMATE) && tmp->type == FIREWALL)
              move_firewall (tmp);
            else
              {
                if ((tmp->stats.sp += tmp->stats.maxsp) > 8)  /* next direction */
                  tmp->stats.sp = ((tmp->stats.sp - 1) % 8) + 1;
                animate_turning (tmp);
              }
            break;

          case TELEPORTER:
            move_teleporter (tmp);
            break;

          case CREATOR:
            move_creator (tmp);
            break;

          case TRIGGER_MARKER:
            move_marker (tmp);
            break;

          case DUPLICATOR:
            move_duplicator (tmp);
            break;
        }
    }
}

/*
 * elmex:
 * This is the new push_button function, it got split up so that
 * you can activate connections without a button now!
 * old but still valid comment:
 *
 * Push the specified object.  This can affect other buttons/gates/handles
 * altars/pedestals/holes in the whole map.
 * Changed the routine to loop through _all_ objects.
 * Better hurry with that linked list...
 *
 */
void
push_button (object *op)
{
  oblinkpt *obp = get_button_links (op);

  if (!obp)
    return;

  if (INVOKE_MAP (TRIGGER, op->map, ARG_INT64 (obp->value), ARG_INT (op->value)))
    return;

  activate_connection_link (obp->link, op->value, op);
}

/*
 * elmex:
 * This activates a connection, similar to push_button (object *op) but it takes
 * only a map, a connection value and a true or false flag that indicated whether
 * the connection was 'state' or 'released'. So that you can activate objects
 * who have FLAG_ACTIVATE_ON_PUSH/RELEASE set properly.
 *
 */
void
activate_connection (maptile *map, long connection, bool state)
{
  if (INVOKE_MAP (TRIGGER, map, ARG_INT64 (connection), ARG_INT (state)))
    return;

  oblinkpt *obp = get_connection_links (map, connection);

  if (obp)
    activate_connection_link (obp->link, state);
}

/*
 * Updates everything connected with the button op.
 * After changing the state of a button, this function must be called
 * to make sure that all gates and other buttons connected to the
 * button reacts to the (eventual) change of state.
 */
void
update_button (object *op)
{
  object *ab, *tmp, *head;
  int tot, any_down = 0, old_value = op->value;
  oblinkpt *obp = 0;
  objectlink *ol;

  obp = get_button_links (op);
  /* LOG(llevDebug, "update_button: %s (%d)\n", op->name, op->count); */
  if (obp)
    for (ol = obp->link; ol; ol = ol->next)
      {
        if (!ol->ob)
          {
            LOG (llevDebug, "Internal error in update_button (%s).\n", &op->name);
            continue;
          }

        tmp = ol->ob;
        if (tmp->type == BUTTON)
          {
            for (ab = tmp->above, tot = 0; ab != NULL; ab = ab->above)
              /* Bug? The pedestal code below looks for the head of
               * the object, this bit doesn't.  I'd think we should check
               * for head here also.  Maybe it also makese sense to 
               * make the for ab=tmp->above loop common, and alter
               * behaviour based on object within that loop?
               */

              /* Basically, if the move_type matches that on what the
               * button wants, we count it.  The second check is so that
               * objects don't move (swords, etc) will count.  Note that
               * this means that more work is needed to make buttons
               * that are only triggered by flying objects.
               */
              if ((ab->move_type & tmp->move_on) || ab->move_type == 0)
                tot += ab->weight * (ab->nrof ? ab->nrof : 1) + ab->carrying;

            tmp->value = (tot >= tmp->weight) ? 1 : 0;
            if (tmp->value)
              any_down = 1;
          }
        else if (tmp->type == PEDESTAL)
          {
            tmp->value = 0;
            for (ab = tmp->above; ab != NULL; ab = ab->above)
              {
                head = ab->head ? ab->head : ab;
                /* Same note regarding move_type for buttons above apply here. */
                if (((head->move_type & tmp->move_on) || ab->move_type == 0) &&
                    (head->race == tmp->slaying ||
                     ((head->type == SPECIAL_KEY) && (head->slaying == tmp->slaying)) ||
                     (!strcmp (tmp->slaying, "player") && head->type == PLAYER)))
                  tmp->value = 1;
              }
            if (tmp->value)
              any_down = 1;
          }
      }
  if (any_down)                 /* If any other buttons were down, force this to remain down */
    op->value = 1;

  /* If this button hasn't changed, don't do anything */
  if (op->value != old_value)
    {
      SET_ANIMATION (op, op->value);
      update_object (op, UP_OBJ_FACE);
      push_button (op);         /* Make all other buttons the same */
    }
}

void
use_trigger (object *op)
{
  /* Toggle value */
  op->value = !op->value;
  push_button (op);
}

/*
 * Note: animate_object should be used instead of this,
 * but it can't handle animations in the 8 directions
 */
void
animate_turning (object *op)    /* only one part objects */
{
  if (++op->state >= NUM_ANIMATIONS (op) / 8)
    op->state = 0;
  SET_ANIMATION (op, (op->stats.sp - 1) * NUM_ANIMATIONS (op) / 8 + op->state);
  update_object (op, UP_OBJ_FACE);
}

#define ARCH_SACRIFICE(xyz) ((xyz)->slaying)
#define NROF_SACRIFICE(xyz) ((uint32)(xyz)->stats.food)

/* Returns true if the sacrifice meets the needs of the altar.
 *
 * Function put in (0.92.1) so that identify altars won't grab money
 * unnecessarily - we can see if there is sufficient money, see if something
 * needs to be identified, and then remove money if needed.
 *
 * 0.93.4: Linked objects (ie, objects that are connected) can not be
 * sacrificed.  This fixes a bug of trying to put multiple altars/related
 * objects on the same space that take the same sacrifice.
 */

int
check_altar_sacrifice (const object *altar, const object *sacrifice)
{
  if (!QUERY_FLAG (sacrifice, FLAG_ALIVE) && !QUERY_FLAG (sacrifice, FLAG_IS_LINKED) && sacrifice->type != PLAYER)
    {
      if ((ARCH_SACRIFICE (altar) == sacrifice->arch->name ||
           ARCH_SACRIFICE (altar) == sacrifice->name ||
           ARCH_SACRIFICE (altar) == sacrifice->slaying ||
           (!strcmp (ARCH_SACRIFICE (altar), query_base_name (sacrifice, 0))))
          && NROF_SACRIFICE (altar) <= (sacrifice->nrof ? sacrifice->nrof : 1))
        return 1;

      if (strcmp (ARCH_SACRIFICE (altar), "money") == 0
          && sacrifice->type == MONEY && sacrifice->nrof * sacrifice->value >= NROF_SACRIFICE (altar))
        return 1;
    }

  return 0;
}

/*
 * operate_altar checks if sacrifice was accepted and removes sacrificed
 * objects.  If sacrifice was succeed return 1 else 0.  Might be better to
 * call check_altar_sacrifice (above) than depend on the return value,
 * since operate_altar will remove the sacrifice also.
 *
 * If this function returns 1, '*sacrifice' is modified to point to the
 * remaining sacrifice, or is set to NULL if the sacrifice was used up.
 */
int
operate_altar (object *altar, object **sacrifice)
{
  if (!altar->map)
    {
      LOG (llevError, "BUG: operate_altar(): altar has no map\n");
      return 0;
    }

  if (!altar->slaying || altar->value)
    return 0;

  if (!check_altar_sacrifice (altar, *sacrifice))
    return 0;

  /* check_altar_sacrifice should have already verified that enough money
   * has been dropped.
   */
  if (!strcmp (ARCH_SACRIFICE (altar), "money"))
    {
      int number = NROF_SACRIFICE (altar) / (*sacrifice)->value;

      /* Round up any sacrifices.  Altars don't make change either */
      if (NROF_SACRIFICE (altar) % (*sacrifice)->value)
        number++;

      *sacrifice = decrease_ob_nr (*sacrifice, number);
    }
  else
    *sacrifice = decrease_ob_nr (*sacrifice, NROF_SACRIFICE (altar));

  if (altar->msg)
    new_info_map (NDI_BLACK, altar->map, altar->msg);

  return 1;
}

void
trigger_move (object *op, int state)    /* 1 down and 0 up */
{
  op->stats.wc = state;
  if (state)
    {
      use_trigger (op);
      op->set_speed (op->stats.exp > 0 ? 1. / op->stats.exp : 1.);
      op->speed_left = -1;
    }
  else
    {
      use_trigger (op);
      op->set_speed (0);
    }
}


/*
 * cause != NULL: something has moved on top of op
 *
 * cause == NULL: nothing has moved, we have been called from
 * animate_trigger().
 *
 * TRIGGER_ALTAR: Returns 1 if 'cause' was destroyed, 0 if not.
 *
 * TRIGGER: Returns 1 if handle could be moved, 0 if not.
 *
 * TRIGGER_BUTTON, TRIGGER_PEDESTAL: Returns 0.
 */
int
check_trigger (object *op, object *cause)
{
  object *tmp;
  int push = 0, tot = 0;
  int in_movement = op->stats.wc || op->speed;

  switch (op->type)
    {
        case TRIGGER_BUTTON:
          if (op->weight > 0)
            {
              if (cause)
                {
                  for (tmp = op->above; tmp; tmp = tmp->above)
                    /* Comment reproduced from update_buttons(): */
                    /* Basically, if the move_type matches that on what the
                     * button wants, we count it.  The second check is so that
                     * objects that don't move (swords, etc) will count.  Note that
                     * this means that more work is needed to make buttons
                     * that are only triggered by flying objects.
                     */

                    if ((tmp->move_type & op->move_on) || tmp->move_type == 0)
                      {
                        tot += tmp->weight * (tmp->nrof ? tmp->nrof : 1) + tmp->carrying;
                      }
                  if (tot >= op->weight)
                    push = 1;
                  if (op->stats.ac == push)
                    return 0;
                  op->stats.ac = push;
                  if (NUM_ANIMATIONS (op) > 1)
                    {
                      SET_ANIMATION (op, push);
                      update_object (op, UP_OBJ_FACE);
                    }
                  if (in_movement || !push)
                    return 0;
                }
              trigger_move (op, push);
            }
          return 0;

        case TRIGGER_PEDESTAL:
          if (cause)
            {
              for (tmp = op->above; tmp; tmp = tmp->above)
                {
                  object *head = tmp->head ? tmp->head : tmp;

                  /* See comment in TRIGGER_BUTTON about move_types */
                  if (((head->move_type & op->move_on) || head->move_type == 0)
                      && (head->race == op->slaying || (!strcmp (op->slaying, "player") && head->type == PLAYER)))
                    {
                      push = 1;
                      break;
                    }
                }
              if (op->stats.ac == push)
                return 0;
              op->stats.ac = push;
              if (NUM_ANIMATIONS (op) > 1)
                {
                  SET_ANIMATION (op, push);
                  update_object (op, UP_OBJ_FACE);
                }
              update_object (op, UP_OBJ_FACE);
              if (in_movement || !push)
                return 0;
            }
          trigger_move (op, push);
          return 0;

        case TRIGGER_ALTAR:
          if (cause)
            {
              if (in_movement)
                return 0;
              if (operate_altar (op, &cause))
                {
                  if (NUM_ANIMATIONS (op) > 1)
                    {
                      SET_ANIMATION (op, 1);
                      update_object (op, UP_OBJ_FACE);
                    }
                  if (op->last_sp >= 0)
                    {
                      trigger_move (op, 1);
                      if (op->last_sp > 0)
                        op->last_sp = -op->last_sp;
                    }
                  else
                    {
                      /* for trigger altar with last_sp, the ON/OFF
                       * status (-> +/- value) is "simulated": 
                       */
                      op->value = !op->value;
                      trigger_move (op, 1);
                      op->last_sp = -op->last_sp;
                      op->value = !op->value;
                    }
                  return cause == NULL;
                }
              else
                {
                  return 0;
                }
            }
          else
            {
              if (NUM_ANIMATIONS (op) > 1)
                {
                  SET_ANIMATION (op, 0);
                  update_object (op, UP_OBJ_FACE);
                }

              /* If trigger_altar has "last_sp > 0" set on the map,
               * it will push the connected value only once per sacrifice.
               * Otherwise (default), the connected value will be
               * pushed twice: First by sacrifice, second by reset! -AV 
               */
              if (!op->last_sp)
                trigger_move (op, 0);
              else
                {
                  op->stats.wc = 0;
                  op->value = !op->value;
                  op->set_speed (0);
                }
            }
          return 0;

        case TRIGGER:
          if (cause)
            {
              if (in_movement)
                return 0;

              push = 1;
            }

          if (NUM_ANIMATIONS (op) > 1)
            {
              SET_ANIMATION (op, push);
              update_object (op, UP_OBJ_FACE);
            }

          trigger_move (op, push);
          return 1;

        default:
          LOG (llevDebug, "Unknown trigger type: %s (%d)\n", &op->name, op->type);
          return 0;
    }
}

void
add_button_link (object *button, maptile *map, int connected)
{
  oblinkpt *obp;
  objectlink *ol = get_objectlink ();

  if (!map)
    {
      LOG (llevError, "Tried to add button-link without map.\n");
      return;
    }

  button->path_attuned = connected;   /* peterm:  I need this so I can rebuild 
                                         a connected map from a template map. */

  SET_FLAG (button, FLAG_IS_LINKED);

  ol->ob = button;

  for (obp = map->buttons; obp && obp->value != connected; obp = obp->next)
    ;

  if (obp)
    {
      ol->next = obp->link;
      obp->link = ol;
    }
  else
    {
      obp = get_objectlinkpt ();
      obp->value = connected;

      obp->next = map->buttons;
      map->buttons = obp;
      obp->link = ol;
    }
}

/*
 * Remove the object from the linked lists of buttons in the map.
 * This is only needed by editors.
 */

void
remove_button_link (object *op)
{
  oblinkpt *obp;
  objectlink **olp, *ol;

  if (op->map == NULL)
    {
      LOG (llevError, "remove_button_link() in object without map.\n");
      return;
    }

  if (!QUERY_FLAG (op, FLAG_IS_LINKED))
    {
      LOG (llevError, "remove_button_linked() in unlinked object.\n");
      return;
    }

  for (obp = op->map->buttons; obp; obp = obp->next)
    for (olp = &obp->link; (ol = *olp); olp = &ol->next)
      if (ol->ob == op)
        {

/*        LOG(llevDebug, "Removed link %d in button %s and map %s.\n",
           obp->value, op->name, op->map->path);
*/
          *olp = ol->next;
          delete ol;
          return;
        }

  LOG (llevError, "remove_button_linked(): couldn't find object.\n");
  CLEAR_FLAG (op, FLAG_IS_LINKED);
}

/*
 * Gets the objectlink for this connection from the map.
 */
oblinkpt *
get_connection_links (maptile *map, long connection)
{
  for (oblinkpt * obp = map->buttons; obp; obp = obp->next)
    if (obp->value == connection)
      return obp;

  return 0;
}

/*
 * Return the first objectlink in the objects linked to this one
 */

oblinkpt *
get_button_links (const object *button)
{
  oblinkpt *obp;
  objectlink *ol;

  if (!button->map)
    return NULL;

  for (obp = button->map->buttons; obp; obp = obp->next)
    for (ol = obp->link; ol; ol = ol->next)
      if (ol->ob == button)
        return obp;

  return NULL;
}

/*
 * Made as a separate function to increase efficiency
 */

int
get_button_value (const object *button)
{
  oblinkpt *obp;
  objectlink *ol;

  if (!button->map)
    return 0;
  for (obp = button->map->buttons; obp; obp = obp->next)
    for (ol = obp->link; ol; ol = ol->next)
      if (ol->ob == button)
        return obp->value;
  return 0;
}

/* This routine makes monsters who are  
 * standing on the 'mood floor' change their
 * disposition if it is different.  
 * If floor is to be triggered must have
 * a speed of zero (default is 1 for all
 * but the charm floor type).
 * by b.t. thomas@nomad.astro.psu.edu
 */

void
do_mood_floor (object *op, object *source)
{
  if (!source)
    source = op;

  mapspace &ms = op->ms ();

  if (!(ms.flags () & P_IS_ALIVE))
    return;

  object *tmp;

  for (tmp = ms.top; tmp; tmp = tmp->below)
    if (QUERY_FLAG (tmp, FLAG_MONSTER))
      break;

  /* doesn't effect players, and if there is a player on this space, won't also
   * be a monster here.
   */
  //TODO: have players really FLAG_MONSTER? kept it for safety
  if (!tmp || tmp->type == PLAYER)
    return;

  switch (op->last_sp)
    {
      case 0:                /* furious--make all monsters mad */
        if (QUERY_FLAG (tmp, FLAG_UNAGGRESSIVE))
          CLEAR_FLAG (tmp, FLAG_UNAGGRESSIVE);

        if (QUERY_FLAG (tmp, FLAG_FRIENDLY))
          {
            tmp->attack_movement = 0;
            /* lots of checks here, but want to make sure we don't
             * dereference a null value
             */
            if (tmp->type == GOLEM
                && tmp->owner
                && tmp->owner->type == PLAYER
                && tmp->owner->contr->golem == tmp)
              tmp->owner->contr->golem = 0;

            tmp->owner = 0;

            remove_friendly_object (tmp);
          }
        break;

      case 1:                /* angry -- get neutral monsters mad */
        if (QUERY_FLAG (tmp, FLAG_UNAGGRESSIVE) && !QUERY_FLAG (tmp, FLAG_FRIENDLY))
          CLEAR_FLAG (tmp, FLAG_UNAGGRESSIVE);
        break;

      case 2:                /* calm -- pacify unfriendly monsters */
        SET_FLAG (tmp, FLAG_UNAGGRESSIVE);
        break;

      case 3:                /* make all monsters fall asleep */
        SET_FLAG (tmp, FLAG_SLEEP);
        break;

      case 4:                /* charm all monsters */
        if (op == source)
          break;              /* only if 'connected' */

        if (object *pl = source->ms ().player ())
          {
            tmp->set_owner (pl);
            SET_FLAG (tmp, FLAG_MONSTER);

            tmp->stats.exp = 0;

            add_friendly_object (tmp);
            tmp->attack_movement = PETMOVE;
          }
        break;

      case 6: // kill monsters
        if (!QUERY_FLAG (tmp, FLAG_FRIENDLY))
          break;

        // FALL THROUGH
      case 5: // kill all alives
        if (!tmp->flag [FLAG_PRECIOUS])
          {
            get_archetype ("burnout")->insert_at (tmp, source);
            tmp->destroy ();
          }
        break;

      default:
        break;
    }
}

/* this function returns the object it matches, or NULL if non.
 * It will descend through containers to find the object.
 *              slaying = match object slaying flag
 *              race = match object archetype name flag
 *              hp = match object type (excpt type '0'== PLAYER)
 */
object *
check_inv_recursive (object *op, const object *trig)
{
  object *tmp, *ret = NULL;

  /* First check the object itself. */
  if ((trig->stats.hp && (op->type == trig->stats.hp))
      || (trig->slaying && (op->slaying == trig->slaying))
      || (trig->race && (op->arch->name == trig->race)))
    return op;

  for (tmp = op->inv; tmp; tmp = tmp->below)
    {
      if (tmp->inv)
        {
          ret = check_inv_recursive (tmp, trig);
          if (ret)
            return ret;
        }
      else if ((trig->stats.hp && (tmp->type == trig->stats.hp))
               || (trig->slaying && (tmp->slaying == trig->slaying))
               || (trig->race && (tmp->arch->name == trig->race)))
        return tmp;
    }
  return NULL;
}

/* check_inv(), a function to search the inventory, 
 * of a player and then based on a set of conditions,
 * the square will activate connected items. 
 * Monsters can't trigger this square (for now)
 * Values are:  last_sp = 1/0 obj/no obj triggers 
 *              last_heal = 1/0  remove/dont remove obj if triggered
 * -b.t. (thomas@nomad.astro.psu.edu 
 *
 * Tue Dec 19 15:34:00 CET 2006 elmex: changed the function to ignore op
 * because the check-inventory semantic essentially only applies when
 * something is above the inventory checker.
 * The semantic prior this change was: trigger if something has moved on or off
 *    and has a matching item. Imagine what happens if someone steps on the inventory
 *    checker with a matching item, has it, activates the connection, throws the item
 *    away, and then leaves the inventory checker. That would've caused an always-enabled
 *    state in the inventory checker. This won't happen anymore now.
 *
 * Wed Jan 10 11:34:26 CET 2007 elmex: fixed this function, we now check
 * whether op is on this mapspace or not, because the value (1|0) depends
 * on this information. also make sure to only push_button if op has 
 * a matching item (because when we do a push_button with value=0 timed gates
 * will still open)! (i hope i got the semantics right this time)
 *
 */
void
check_inv (object *op, object *trig)
{
  trig->value = 0; // deactivate if none of the following conditions apply

  object *pl    = trig->ms ().player ();
  object *match = check_inv_recursive (op, trig);

  // elmex: a note about (pl == op):
  // if pl == 0 then the player has left this space
  // if pl != 0 then a player is on this mapspace, but then
  // we still have to check whether it's the player that triggered
  // this inv-checker, because if not, then the op left this inv-checker
  // and we have to set the value to 0

  if (match && trig->last_sp) // match == having
    {
      if (trig->last_heal)
        decrease_ob (match);

      trig->value = (pl == op ? 1 : 0); // 1 if matching player entered, and 0 if he left
      push_button (trig);
    }
  else if (!match && !trig->last_sp) // match == not having
    {
      trig->value = (pl == op ? 1 : 0); // 1 if matching player entered, and 0 if he left
      push_button (trig);
    }
}

Revision:	1.31
Committed:	Mon Apr 30 04:25:29 2007 UTC (17 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.30:	+2 -2 lines
Log Message:	This is the first rough cut of the skill use system (use the STABLE tag). Details will likely change, and combat skills do not work very well, but it works quite well. Players no longer have a shoottype or range slots, instead, each player has these members: combat_skill/combat_ob the currently selected skill (and weapon) for direct attacks. ranged_skill/ranged_ob the currently selected ranged skill (and bow/spell/item) golem the currently-controlled golem, if any.