server/server/move.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992,2007 Frank Tore Johansen
 * 
 * Deliantra is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

#include <global.h>
#ifndef __CEXTRACT__
# include <sproto.h>
#endif

/*
 * move_object() tries to move object op in the direction "dir".
 * If it fails (something blocks the passage), it returns 0,
 * otherwise 1.
 * This is an improvement from the previous move_ob(), which
 * removed and inserted objects even if they were unable to move.
 */

int
move_object (object *op, int dir)
{
  return move_ob (op, dir, op);
}

/* object op is trying to move in direction dir.
 * originator is typically the same as op, but
 * can be different if originator is causing op to
 * move (originator is pushing op)
 * returns 0 if the object is not able to move to the
 * desired space, 1 otherwise (in which case we also 
 * move the object accordingly.  This function is
 * very similiar to move_object.
  */
int
move_ob (object *op, int dir, object *originator)
{
  sint16 newx = op->x + freearr_x[dir];
  sint16 newy = op->y + freearr_y[dir];
  object *tmp;
  maptile *m;
  int mflags;

  if (op == NULL)
    {
      LOG (llevError, "Trying to move NULL.\n");
      return 0;
    }

  m = op->map;
  mflags = get_map_flags (m, &m, newx, newy, &newx, &newy);

  /* If the space the player is trying to is out of the map,
   * bail now - we know it can't work.
   */
  if (mflags & P_OUT_OF_MAP)
    return 0;

  /* Is this space blocked?  Players with wizpass are immune to
   * this condition.
   */
  if (blocked_link (op, m, newx, newy) && !QUERY_FLAG (op, FLAG_WIZPASS))
    return 0;

  /* 0.94.2 - we need to set the direction for the new animation code.
   * it uses it to figure out face to use - I can't see it
   * breaking anything, but it might.
   */
  if (op->more && !move_ob (op->more, dir, op->more->head))
    return 0;

  op->direction = dir;

  if (op->will_apply & 4)
    check_earthwalls (op, m, newx, newy);

  if (op->will_apply & 8)
    check_doors (op, m, newx, newy);

  /* 0.94.1 - I got a stack trace that showed it crash with remove_ob trying
   * to remove a removed object, and this function was the culprit.  A possible
   * guess I have is that check_doors above ran into a trap, killing the
   * monster.
   *
   * Unfortunately, it doesn't appear that the calling functions of move_object
   * deal very well with op being killed, so all this might do is just
   * migrate the problem someplace else.
   */

  if (QUERY_FLAG (op, FLAG_REMOVED))
    {
      LOG (llevDebug, "move_object: monster has been removed - will not process further\n");
      /* Was not successful, but don't want to try and move again */
      return 1;
    }

  /* If this is a tail portion, just want to tell caller that move is
   * ok - the caller will deal with actual object removal/insertion
   */
  if (op->head)
    return 1;

  if (m != op->map && op->contr)
    {
      if (INVOKE_MAP (LEAVE, op->map, ARG_PLAYER (op->contr)))
        return 0;

      op->remove ();

      if (INVOKE_PLAYER (MAP_CHANGE, op->contr, ARG_MAP (m), ARG_INT (newx), ARG_INT (newy)))
        return 0;

      if (INVOKE_MAP (ENTER, m, ARG_PLAYER (op->contr), ARG_INT (newx), ARG_INT (newy)))
        return 0;
    }
  else
    op->remove ();

  /* we already have newx, newy, and m, so lets use them.
   * In addition, this fixes potential crashes, because multipart object was
   * on edge of map, +=x, +=y doesn't make correct coordinates.
   */
  for (tmp = op; tmp != NULL; tmp = tmp->more)
    {
      tmp->x += freearr_x[dir];
      tmp->y += freearr_y[dir];
      tmp->map = get_map_from_coord (tmp->map, &tmp->x, &tmp->y);
    }

  /* insert_ob_in_map will deal with any tiling issues */
  insert_ob_in_map (op, m, originator, 0);

  return 1;
}


/*
 * transfer_ob(): Move an object (even linked objects) to another spot
 * on the same map.
 *
 * Does nothing if there is no free spot.
 *
 * randomly: If true, use find_free_spot() to find the destination, otherwise
 * use find_first_free_spot().
 *
 * Return value: 1 if object was destroyed, 0 otherwise.
 */

int
transfer_ob (object *op, int x, int y, int randomly, object *originator)
{
  int i;
  object *tmp;

  if (randomly)
    i = find_free_spot (op, op->map, x, y, 0, SIZEOFFREE);
  else
    i = find_first_free_spot (op, op->map, x, y);

  if (i == -1)
    return 0;                   /* No free spot */

  if (op->head != NULL)
    op = op->head;
  op->remove ();
  for (tmp = op; tmp != NULL; tmp = tmp->more)
    tmp->x = x + freearr_x[i] + (tmp->arch == NULL ? 0 : tmp->arch->x),
      tmp->y = y + freearr_y[i] + (tmp->arch == NULL ? 0 : tmp->arch->y);

  tmp = insert_ob_in_map (op, op->map, originator, 0);
  if (tmp)
    return 0;
  else
    return 1;
}

/*
 * Return value: 1 if object was destroyed, 0 otherwise.
 * Modified so that instead of passing the 'originator' that had no
 * real use, instead we pass the 'user' of the teleporter.  All the
 * callers know what they wanted to teleporter (move_teleporter or
 * shop map code)
 * tele_type is the type of teleporter we want to match against -
 * currently, this is either set to SHOP_MAT or TELEPORTER.
 * It is basically used so that shop_mats and normal teleporters can
 * be used close to each other and not have the player put to the
 * one of another type.
 */
int
teleport (object *teleporter, uint8 tele_type, object *user)
{
  object *altern;
  int i, j, k, nrofalt = 0;
  object *other_teleporter, *tmp;
  maptile *m;
  sint16 sx, sy;

  if (user == NULL)
    return 0;
  if (user->head != NULL)
    user = user->head;

  /* Find all other teleporters within range.  This range
   * should really be setable by some object attribute instead of
   * using hard coded values.
   */
  for (i = -5; i < 6; i++)
    for (j = -5; j < 6; j++)
      {
        if (i == 0 && j == 0)
          continue;
        /* Perhaps this should be extended to support tiled maps */
        if (OUT_OF_REAL_MAP (teleporter->map, teleporter->x + i, teleporter->y + j))
          continue;
        other_teleporter = GET_MAP_OB (teleporter->map, teleporter->x + i, teleporter->y + j);

        while (other_teleporter)
          {
            if (other_teleporter->type == tele_type)
              break;
            other_teleporter = other_teleporter->above;
          }
        if (other_teleporter && !(RANDOM () % ++nrofalt))
          altern = other_teleporter;
      }

  if (!nrofalt)
    {
      LOG (llevError, "No alternative teleporters around!\n");
      return 0;
    }

  other_teleporter = altern;
  k = find_free_spot (user, other_teleporter->map, other_teleporter->x, other_teleporter->y, 1, 9);

  /* if k==-1, unable to find a free spot.  If this is shop
   * mat that the player is using, find someplace to move
   * the player - otherwise, player can get trapped in the shops
   * that appear in random dungeons.  We basically just make
   * sure the space isn't no pass (eg wall), and don't care
   * about is alive.
   */
  if (k == -1)
    {
      if (tele_type == SHOP_MAT && user->type == PLAYER)
        {
          for (k = 1; k < 9; k++)
            {
              if (get_map_flags (other_teleporter->map, &m,
                                 other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k], &sx, &sy) & P_OUT_OF_MAP)
                continue;

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

            }
          if (k == 9)
            {
              LOG (llevError, "Shop mat %s (%d, %d) is in solid rock?\n",
                   &other_teleporter->name, other_teleporter->x, other_teleporter->y);
              return 0;
            }
        }
      else
        return 0;
    }

  user->remove ();

  /* Update location for the object */
  for (tmp = user; tmp != NULL; tmp = tmp->more)
    {
      tmp->x = other_teleporter->x + freearr_x[k] + (tmp->arch == NULL ? 0 : tmp->arch->x);
      tmp->y = other_teleporter->y + freearr_y[k] + (tmp->arch == NULL ? 0 : tmp->arch->y);
    }
  tmp = insert_ob_in_map (user, other_teleporter->map, NULL, 0);
  return (tmp == NULL);
}

void
recursive_roll (object *op, int dir, object *pusher)
{
  if (!roll_ob (op, dir, pusher))
    {
      new_draw_info_format (NDI_UNIQUE, 0, pusher, "You fail to push the %s.", query_name (op));
      return;
    }
  (void) move_ob (pusher, dir, pusher);
  new_draw_info_format (NDI_BLACK, 0, pusher, "You move the %s.", query_name (op));
  return;
}

/*
 * This is a new version of blocked, this one handles objects
 * that can be passed through by monsters with the CAN_PASS_THRU defined.
 *
 * very new version handles also multipart objects
 * This is currently only used for the boulder roll code.
 * Returns 1 if object does not fit, 0 if it does.
 */

int
try_fit (object *op, maptile *m, int x, int y)
{
  object *tmp, *more;
  sint16 tx, ty;
  int mflags;
  maptile *m2;

  if (op->head)
    op = op->head;

  for (more = op; more; more = more->more)
    {
      tx = x + more->x - op->x;
      ty = y + more->y - op->y;

      mflags = get_map_flags (m, &m2, tx, ty, &tx, &ty);

      if (mflags & P_OUT_OF_MAP)
        return 1;

      for (tmp = GET_MAP_OB (m2, tx, ty); tmp; tmp = tmp->above)
        {
          if (tmp->head == op || tmp == op)
            continue;

          if ((QUERY_FLAG (tmp, FLAG_ALIVE) && tmp->type != DOOR))
            return 1;

          if (OB_MOVE_BLOCK (op, tmp))
            return 1;

        }
    }
  return 0;
}

/*
 * this is not perfect yet. 
 * it does not roll objects behind multipart objects properly.
 * Support for rolling multipart objects is questionable.
 */

int
roll_ob (object *op, int dir, object *pusher)
{
  object *tmp;
  sint16 x, y;
  int flags;
  maptile *m;
  MoveType move_block;

  if (op->head)
    op = op->head;

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

  if (!QUERY_FLAG (op, FLAG_CAN_ROLL) || (op->weight && random_roll (0, op->weight / 50000 - 1, pusher, PREFER_LOW) > pusher->stats.Str))
    return 0;

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

  if (flags & (P_OUT_OF_MAP | P_IS_ALIVE))
    return 0;

  move_block = GET_MAP_MOVE_BLOCK (m, x, y);

  /* If the target space is not blocked, no need to look at the objects on it */
  if ((op->move_type & move_block) == op->move_type)
    {
      for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above)
        {
          if (tmp->head == op)
            continue;
          if (OB_MOVE_BLOCK (op, tmp) && !roll_ob (tmp, dir, pusher))
            return 0;
        }
    }
  if (try_fit (op, m, x, y))
    return 0;

  op->remove ();
  for (tmp = op; tmp != NULL; tmp = tmp->more)
    tmp->x += freearr_x[dir], tmp->y += freearr_y[dir];
  insert_ob_in_map (op, op->map, pusher, 0);
  return 1;
}

/* returns 1 if pushing invokes a attack, 0 when not */
int
push_ob (object *who, int dir, object *pusher)
{
  int str1, str2;
  object *owner;

  if (who->head != NULL)
    who = who->head;
  owner = who->owner;

  /* Wake up sleeping monsters that may be pushed */
  CLEAR_FLAG (who, FLAG_SLEEP);

  /* player change place with his pets or summoned creature */
  /* TODO: allow multi arch pushing. Can't be very difficult */
  if (who->more == NULL
      && ((owner && owner->contr && pusher->contr && same_party (owner->contr->party, pusher->contr->party))
          || owner == pusher)
    )
    {
      int temp;
      maptile *m;

      who->remove ();
      pusher->remove ();
      temp = pusher->x;
      pusher->x = who->x;
      who->x = temp;

      temp = pusher->y;
      pusher->y = who->y;
      who->y = temp;

      m = pusher->map;
      pusher->map = who->map;
      who->map = m;

      insert_ob_in_map (who, who->map, pusher, 0);
      insert_ob_in_map (pusher, pusher->map, pusher, 0);
      return 0;
    }

  /* We want ONLY become enemy of evil, unaggressive monster. We must RUN in them */
  /* In original we have here a unaggressive check only - that was the reason why */
  /* we so often become an enemy of friendly monsters... */
  /* funny: was they set to unaggressive 0 (= not so nice) they don't attack */
  if (owner != pusher && pusher->type == PLAYER && who->type != PLAYER &&
      !QUERY_FLAG (who, FLAG_FRIENDLY) && !QUERY_FLAG (who, FLAG_NEUTRAL))
    {
      if (pusher->contr->run_on)        /* only when we run */
        {
          new_draw_info_format (NDI_UNIQUE, 0, pusher, "You start to attack %s!!", &who->name);
          CLEAR_FLAG (who, FLAG_UNAGGRESSIVE);  /* the sucker don't like you anymore */
          who->enemy = pusher;
          return 1;
        }
      else
        new_draw_info_format (NDI_UNIQUE, 0, pusher, "You avoid attacking %s.", &who->name);
    }

  /* now, lets test stand still. we NEVER can push stand_still monsters. */
  if (QUERY_FLAG (who, FLAG_STAND_STILL))
    {
      new_draw_info_format (NDI_UNIQUE, 0, pusher, "You can't push %s.", &who->name);
      return 0;
    }

  /* This block is basically if you are pushing friendly but
   * non pet creaturs.
   * It basically does a random strength comparision to
   * determine if you can push someone around.  Note that
   * this pushes the other person away - its not a swap.
   */

  str1 = (who->stats.Str > 0 ? who->stats.Str : who->level);
  str2 = (pusher->stats.Str > 0 ? pusher->stats.Str : pusher->level);
  if (QUERY_FLAG (who, FLAG_WIZ) ||
      random_roll (str1, str1 * 5 / 2, who, PREFER_HIGH) >=
      random_roll (str2, str2 * 5 / 2, pusher, PREFER_HIGH) || !move_object (who, dir))
    {
      if (who->type == PLAYER)
        new_draw_info_format (NDI_UNIQUE, 0, who, "%s tried to push you.", &pusher->name);

      return 0;
    }

  /* If we get here, the push succeeded.
   * Let everyone know the status.
   */
  if (who->type == PLAYER)
    {
      new_draw_info_format (NDI_UNIQUE, 0, who, "%s pushed you.", &pusher->name);
    }
  if (pusher->type == PLAYER)
    {
      new_draw_info_format (NDI_UNIQUE, 0, pusher, "You pushed %s back.", &who->name);
    }

  return 1;
}
Revision:	1.22
Committed:	Thu Nov 8 19:43:27 2007 UTC (16 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.21:	+4 -4 lines
Log Message:	update copyrights and other minor stuff to deliantra
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.22	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	pippijn	1.15	*
4	root	1.22	* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.19	* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6			* Copyright (©) 1992,2007 Frank Tore Johansen
7	pippijn	1.15	*
8	root	1.22	* Deliantra is free software: you can redistribute it and/or modify
9	root	1.21	* it under the terms of the GNU General Public License as published by
10			* the Free Software Foundation, either version 3 of the License, or
11			* (at your option) any later version.
12	pippijn	1.15	*
13	root	1.21	* This program is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			* GNU General Public License for more details.
17	pippijn	1.15	*
18	root	1.21	* You should have received a copy of the GNU General Public License
19			* along with this program. If not, see <http://www.gnu.org/licenses/>.
20	root	1.19	*
21	root	1.22	* The authors can be reached via e-mail to <support@deliantra.net>
22	pippijn	1.15	*/
23	elmex	1.1
24			#include <global.h>
25			#ifndef __CEXTRACT__
26	root	1.7	# include <sproto.h>
27	elmex	1.1	#endif
28
29			/*
30			* move_object() tries to move object op in the direction "dir".
31			* If it fails (something blocks the passage), it returns 0,
32			* otherwise 1.
33			* This is an improvement from the previous move_ob(), which
34			* removed and inserted objects even if they were unable to move.
35			*/
36
37	root	1.7	int
38			move_object (object *op, int dir)
39			{
40			return move_ob (op, dir, op);
41	elmex	1.1	}
42
43			/* object op is trying to move in direction dir.
44			* originator is typically the same as op, but
45			* can be different if originator is causing op to
46			* move (originator is pushing op)
47			* returns 0 if the object is not able to move to the
48			* desired space, 1 otherwise (in which case we also
49			* move the object accordingly. This function is
50			* very similiar to move_object.
51			*/
52	root	1.7	int
53			move_ob (object op, int dir, object originator)
54	elmex	1.1	{
55	root	1.7	sint16 newx = op->x + freearr_x[dir];
56			sint16 newy = op->y + freearr_y[dir];
57			object *tmp;
58	root	1.9	maptile *m;
59	root	1.7	int mflags;
60	elmex	1.1
61	root	1.7	if (op == NULL)
62			{
63			LOG (llevError, "Trying to move NULL.\n");
64			return 0;
65	elmex	1.1	}
66
67	root	1.7	m = op->map;
68			mflags = get_map_flags (m, &m, newx, newy, &newx, &newy);
69
70			/* If the space the player is trying to is out of the map,
71			* bail now - we know it can't work.
72			*/
73			if (mflags & P_OUT_OF_MAP)
74			return 0;
75	elmex	1.1
76	root	1.7	/* Is this space blocked? Players with wizpass are immune to
77			* this condition.
78			*/
79			if (blocked_link (op, m, newx, newy) && !QUERY_FLAG (op, FLAG_WIZPASS))
80			return 0;
81	elmex	1.1
82	root	1.7	/* 0.94.2 - we need to set the direction for the new animation code.
83			* it uses it to figure out face to use - I can't see it
84			* breaking anything, but it might.
85			*/
86	root	1.12	if (op->more && !move_ob (op->more, dir, op->more->head))
87	root	1.7	return 0;
88	elmex	1.1
89	root	1.7	op->direction = dir;
90	elmex	1.1
91	root	1.7	if (op->will_apply & 4)
92			check_earthwalls (op, m, newx, newy);
93	root	1.12
94	root	1.7	if (op->will_apply & 8)
95			check_doors (op, m, newx, newy);
96
97			/* 0.94.1 - I got a stack trace that showed it crash with remove_ob trying
98			* to remove a removed object, and this function was the culprit. A possible
99			* guess I have is that check_doors above ran into a trap, killing the
100			* monster.
101			*
102			* Unfortunately, it doesn't appear that the calling functions of move_object
103			* deal very well with op being killed, so all this might do is just
104			* migrate the problem someplace else.
105			*/
106	elmex	1.1
107	root	1.7	if (QUERY_FLAG (op, FLAG_REMOVED))
108			{
109			LOG (llevDebug, "move_object: monster has been removed - will not process further\n");
110			/* Was not successful, but don't want to try and move again */
111			return 1;
112	elmex	1.1	}
113
114	root	1.7	/* If this is a tail portion, just want to tell caller that move is
115			* ok - the caller will deal with actual object removal/insertion
116			*/
117			if (op->head)
118			return 1;
119	elmex	1.1
120	root	1.13	if (m != op->map && op->contr)
121			{
122			if (INVOKE_MAP (LEAVE, op->map, ARG_PLAYER (op->contr)))
123			return 0;
124
125			op->remove ();
126
127			if (INVOKE_PLAYER (MAP_CHANGE, op->contr, ARG_MAP (m), ARG_INT (newx), ARG_INT (newy)))
128			return 0;
129
130			if (INVOKE_MAP (ENTER, m, ARG_PLAYER (op->contr), ARG_INT (newx), ARG_INT (newy)))
131			return 0;
132			}
133			else
134			op->remove ();
135	elmex	1.1
136	root	1.7	/* we already have newx, newy, and m, so lets use them.
137			* In addition, this fixes potential crashes, because multipart object was
138			* on edge of map, +=x, +=y doesn't make correct coordinates.
139			*/
140			for (tmp = op; tmp != NULL; tmp = tmp->more)
141			{
142			tmp->x += freearr_x[dir];
143			tmp->y += freearr_y[dir];
144			tmp->map = get_map_from_coord (tmp->map, &tmp->x, &tmp->y);
145	elmex	1.1	}
146
147	root	1.7	/* insert_ob_in_map will deal with any tiling issues */
148			insert_ob_in_map (op, m, originator, 0);
149	elmex	1.1
150	root	1.7	return 1;
151	elmex	1.1	}
152
153
154			/*
155			* transfer_ob(): Move an object (even linked objects) to another spot
156			* on the same map.
157			*
158			* Does nothing if there is no free spot.
159			*
160			* randomly: If true, use find_free_spot() to find the destination, otherwise
161			* use find_first_free_spot().
162			*
163			* Return value: 1 if object was destroyed, 0 otherwise.
164			*/
165
166	root	1.7	int
167			transfer_ob (object op, int x, int y, int randomly, object originator)
168	elmex	1.1	{
169	root	1.7	int i;
170			object *tmp;
171
172			if (randomly)
173			i = find_free_spot (op, op->map, x, y, 0, SIZEOFFREE);
174			else
175			i = find_first_free_spot (op, op->map, x, y);
176
177			if (i == -1)
178			return 0; /* No free spot */
179
180			if (op->head != NULL)
181			op = op->head;
182	root	1.10	op->remove ();
183	root	1.7	for (tmp = op; tmp != NULL; tmp = tmp->more)
184	root	1.20	tmp->x = x + freearr_x[i] + (tmp->arch == NULL ? 0 : tmp->arch->x),
185			tmp->y = y + freearr_y[i] + (tmp->arch == NULL ? 0 : tmp->arch->y);
186	elmex	1.1
187	root	1.7	tmp = insert_ob_in_map (op, op->map, originator, 0);
188			if (tmp)
189			return 0;
190			else
191			return 1;
192	elmex	1.1	}
193
194			/*
195			* Return value: 1 if object was destroyed, 0 otherwise.
196			* Modified so that instead of passing the 'originator' that had no
197			* real use, instead we pass the 'user' of the teleporter. All the
198			* callers know what they wanted to teleporter (move_teleporter or
199			* shop map code)
200			* tele_type is the type of teleporter we want to match against -
201			* currently, this is either set to SHOP_MAT or TELEPORTER.
202			* It is basically used so that shop_mats and normal teleporters can
203			* be used close to each other and not have the player put to the
204			* one of another type.
205			*/
206	root	1.7	int
207			teleport (object teleporter, uint8 tele_type, object user)
208	elmex	1.1	{
209	root	1.7	object *altern;
210			int i, j, k, nrofalt = 0;
211			object other_teleporter, tmp;
212	root	1.9	maptile *m;
213	root	1.7	sint16 sx, sy;
214
215			if (user == NULL)
216			return 0;
217			if (user->head != NULL)
218			user = user->head;
219	elmex	1.1
220	root	1.7	/* Find all other teleporters within range. This range
221			* should really be setable by some object attribute instead of
222			* using hard coded values.
223			*/
224			for (i = -5; i < 6; i++)
225			for (j = -5; j < 6; j++)
226			{
227			if (i == 0 && j == 0)
228			continue;
229			/* Perhaps this should be extended to support tiled maps */
230			if (OUT_OF_REAL_MAP (teleporter->map, teleporter->x + i, teleporter->y + j))
231			continue;
232	root	1.12	other_teleporter = GET_MAP_OB (teleporter->map, teleporter->x + i, teleporter->y + j);
233	root	1.7
234			while (other_teleporter)
235			{
236			if (other_teleporter->type == tele_type)
237			break;
238			other_teleporter = other_teleporter->above;
239			}
240			if (other_teleporter && !(RANDOM () % ++nrofalt))
241			altern = other_teleporter;
242			}
243	elmex	1.1
244	root	1.7	if (!nrofalt)
245			{
246			LOG (llevError, "No alternative teleporters around!\n");
247			return 0;
248	elmex	1.1	}
249
250	root	1.7	other_teleporter = altern;
251			k = find_free_spot (user, other_teleporter->map, other_teleporter->x, other_teleporter->y, 1, 9);
252
253			/* if k==-1, unable to find a free spot. If this is shop
254			* mat that the player is using, find someplace to move
255			* the player - otherwise, player can get trapped in the shops
256			* that appear in random dungeons. We basically just make
257			* sure the space isn't no pass (eg wall), and don't care
258			* about is alive.
259			*/
260			if (k == -1)
261			{
262			if (tele_type == SHOP_MAT && user->type == PLAYER)
263			{
264			for (k = 1; k < 9; k++)
265			{
266			if (get_map_flags (other_teleporter->map, &m,
267			other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k], &sx, &sy) & P_OUT_OF_MAP)
268			continue;
269	root	1.4
270	root	1.7	if (!OB_TYPE_MOVE_BLOCK (user, GET_MAP_MOVE_BLOCK (m, sx, sy)))
271			break;
272	root	1.4
273			}
274	root	1.7	if (k == 9)
275			{
276			LOG (llevError, "Shop mat %s (%d, %d) is in solid rock?\n",
277			&other_teleporter->name, other_teleporter->x, other_teleporter->y);
278			return 0;
279	root	1.4	}
280			}
281	root	1.7	else
282			return 0;
283	elmex	1.1	}
284
285	root	1.10	user->remove ();
286	elmex	1.1
287	root	1.7	/* Update location for the object */
288			for (tmp = user; tmp != NULL; tmp = tmp->more)
289			{
290	root	1.20	tmp->x = other_teleporter->x + freearr_x[k] + (tmp->arch == NULL ? 0 : tmp->arch->x);
291			tmp->y = other_teleporter->y + freearr_y[k] + (tmp->arch == NULL ? 0 : tmp->arch->y);
292	elmex	1.1	}
293	root	1.7	tmp = insert_ob_in_map (user, other_teleporter->map, NULL, 0);
294			return (tmp == NULL);
295	elmex	1.1	}
296
297	root	1.7	void
298			recursive_roll (object op, int dir, object pusher)
299			{
300			if (!roll_ob (op, dir, pusher))
301			{
302			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You fail to push the %s.", query_name (op));
303			return;
304			}
305			(void) move_ob (pusher, dir, pusher);
306			new_draw_info_format (NDI_BLACK, 0, pusher, "You move the %s.", query_name (op));
307	elmex	1.1	return;
308			}
309
310			/*
311			* This is a new version of blocked, this one handles objects
312			* that can be passed through by monsters with the CAN_PASS_THRU defined.
313			*
314			* very new version handles also multipart objects
315			* This is currently only used for the boulder roll code.
316			* Returns 1 if object does not fit, 0 if it does.
317			*/
318
319	root	1.7	int
320	root	1.9	try_fit (object op, maptile m, int x, int y)
321	elmex	1.1	{
322	root	1.7	object tmp, more;
323			sint16 tx, ty;
324			int mflags;
325	root	1.9	maptile *m2;
326	elmex	1.1
327	root	1.7	if (op->head)
328			op = op->head;
329	elmex	1.1
330	root	1.7	for (more = op; more; more = more->more)
331			{
332			tx = x + more->x - op->x;
333			ty = y + more->y - op->y;
334	elmex	1.1
335	root	1.7	mflags = get_map_flags (m, &m2, tx, ty, &tx, &ty);
336	elmex	1.1
337	root	1.7	if (mflags & P_OUT_OF_MAP)
338			return 1;
339	elmex	1.1
340	root	1.12	for (tmp = GET_MAP_OB (m2, tx, ty); tmp; tmp = tmp->above)
341	root	1.7	{
342			if (tmp->head == op \|\| tmp == op)
343			continue;
344	elmex	1.1
345	root	1.7	if ((QUERY_FLAG (tmp, FLAG_ALIVE) && tmp->type != DOOR))
346			return 1;
347	elmex	1.1
348	root	1.7	if (OB_MOVE_BLOCK (op, tmp))
349			return 1;
350	elmex	1.1
351	root	1.4	}
352	elmex	1.1	}
353	root	1.7	return 0;
354	elmex	1.1	}
355
356			/*
357			* this is not perfect yet.
358			* it does not roll objects behind multipart objects properly.
359			* Support for rolling multipart objects is questionable.
360			*/
361
362	root	1.7	int
363			roll_ob (object op, int dir, object pusher)
364			{
365			object *tmp;
366			sint16 x, y;
367			int flags;
368	root	1.9	maptile *m;
369	root	1.7	MoveType move_block;
370
371			if (op->head)
372			op = op->head;
373
374			x = op->x + freearr_x[dir];
375			y = op->y + freearr_y[dir];
376
377			if (!QUERY_FLAG (op, FLAG_CAN_ROLL) \|\| (op->weight && random_roll (0, op->weight / 50000 - 1, pusher, PREFER_LOW) > pusher->stats.Str))
378			return 0;
379	elmex	1.1
380	root	1.7	m = op->map;
381			flags = get_map_flags (m, &m, x, y, &x, &y);
382	elmex	1.1
383	root	1.7	if (flags & (P_OUT_OF_MAP \| P_IS_ALIVE))
384			return 0;
385	elmex	1.1
386	root	1.7	move_block = GET_MAP_MOVE_BLOCK (m, x, y);
387	elmex	1.1
388	root	1.7	/* If the target space is not blocked, no need to look at the objects on it */
389			if ((op->move_type & move_block) == op->move_type)
390			{
391	root	1.12	for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above)
392	root	1.7	{
393			if (tmp->head == op)
394	root	1.4	continue;
395	root	1.7	if (OB_MOVE_BLOCK (op, tmp) && !roll_ob (tmp, dir, pusher))
396	root	1.4	return 0;
397			}
398	elmex	1.1	}
399	root	1.7	if (try_fit (op, m, x, y))
400			return 0;
401	elmex	1.1
402	root	1.10	op->remove ();
403	root	1.7	for (tmp = op; tmp != NULL; tmp = tmp->more)
404			tmp->x += freearr_x[dir], tmp->y += freearr_y[dir];
405			insert_ob_in_map (op, op->map, pusher, 0);
406			return 1;
407	elmex	1.1	}
408
409			/* returns 1 if pushing invokes a attack, 0 when not */
410	root	1.7	int
411			push_ob (object who, int dir, object pusher)
412			{
413			int str1, str2;
414			object *owner;
415
416			if (who->head != NULL)
417			who = who->head;
418	root	1.11	owner = who->owner;
419	root	1.7
420			/* Wake up sleeping monsters that may be pushed */
421			CLEAR_FLAG (who, FLAG_SLEEP);
422
423			/* player change place with his pets or summoned creature */
424			/* TODO: allow multi arch pushing. Can't be very difficult */
425			if (who->more == NULL
426	root	1.18	&& ((owner && owner->contr && pusher->contr && same_party (owner->contr->party, pusher->contr->party))
427			\|\| owner == pusher)
428	root	1.7	)
429			{
430			int temp;
431	root	1.9	maptile *m;
432	root	1.7
433	root	1.10	who->remove ();
434			pusher->remove ();
435	root	1.7	temp = pusher->x;
436			pusher->x = who->x;
437			who->x = temp;
438
439			temp = pusher->y;
440			pusher->y = who->y;
441			who->y = temp;
442	root	1.4
443	root	1.7	m = pusher->map;
444			pusher->map = who->map;
445			who->map = m;
446
447			insert_ob_in_map (who, who->map, pusher, 0);
448			insert_ob_in_map (pusher, pusher->map, pusher, 0);
449			return 0;
450	elmex	1.1	}
451
452	root	1.7	/* We want ONLY become enemy of evil, unaggressive monster. We must RUN in them */
453			/* In original we have here a unaggressive check only - that was the reason why */
454			/* we so often become an enemy of friendly monsters... */
455			/* funny: was they set to unaggressive 0 (= not so nice) they don't attack */
456			if (owner != pusher && pusher->type == PLAYER && who->type != PLAYER &&
457			!QUERY_FLAG (who, FLAG_FRIENDLY) && !QUERY_FLAG (who, FLAG_NEUTRAL))
458			{
459			if (pusher->contr->run_on) /* only when we run */
460			{
461	root	1.16	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You start to attack %s!!", &who->name);
462	root	1.7	CLEAR_FLAG (who, FLAG_UNAGGRESSIVE); /* the sucker don't like you anymore */
463			who->enemy = pusher;
464			return 1;
465	root	1.4	}
466	root	1.7	else
467	root	1.16	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You avoid attacking %s.", &who->name);
468	elmex	1.1	}
469
470	root	1.7	/* now, lets test stand still. we NEVER can push stand_still monsters. */
471			if (QUERY_FLAG (who, FLAG_STAND_STILL))
472	elmex	1.1	{
473	root	1.7	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You can't push %s.", &who->name);
474			return 0;
475	elmex	1.1	}
476	root	1.7
477			/* This block is basically if you are pushing friendly but
478			* non pet creaturs.
479			* It basically does a random strength comparision to
480			* determine if you can push someone around. Note that
481			* this pushes the other person away - its not a swap.
482			*/
483
484			str1 = (who->stats.Str > 0 ? who->stats.Str : who->level);
485			str2 = (pusher->stats.Str > 0 ? pusher->stats.Str : pusher->level);
486			if (QUERY_FLAG (who, FLAG_WIZ) \|\|
487	root	1.17	random_roll (str1, str1 * 5 / 2, who, PREFER_HIGH) >=
488			random_roll (str2, str2 * 5 / 2, pusher, PREFER_HIGH) \|\| !move_object (who, dir))
489	root	1.7	{
490			if (who->type == PLAYER)
491	root	1.17	new_draw_info_format (NDI_UNIQUE, 0, who, "%s tried to push you.", &pusher->name);
492
493	root	1.7	return 0;
494	elmex	1.1	}
495
496	root	1.7	/* If we get here, the push succeeded.
497			* Let everyone know the status.
498			*/
499			if (who->type == PLAYER)
500			{
501			new_draw_info_format (NDI_UNIQUE, 0, who, "%s pushed you.", &pusher->name);
502	elmex	1.1	}
503	root	1.7	if (pusher->type == PLAYER)
504			{
505			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You pushed %s back.", &who->name);
506			}
507
508			return 1;
509	elmex	1.1	}