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, "%s: no alternative teleporters around (user %s).\n",
           teleporter->debug_desc (), user->debug_desc ());
      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:	1.23
Committed:	Fri Nov 16 04:18:10 2007 UTC (16 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_4, rel-2_5, rel-2_52, rel-2_53, rel-2_32, rel-2_43, rel-2_42, rel-2_41
Changes since 1.22:	+2 -1 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	*
4	* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6	* Copyright (©) 1992,2007 Frank Tore Johansen
7	*
8	* Deliantra is free software: you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License as published by
10	* the Free Software Foundation, either version 3 of the License, or
11	* (at your option) any later version.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
20	*
21	* The authors can be reached via e-mail to <support@deliantra.net>
22	*/
23
24	#include <global.h>
25	#ifndef __CEXTRACT__
26	# include <sproto.h>
27	#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	int
38	move_object (object *op, int dir)
39	{
40	return move_ob (op, dir, op);
41	}
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	int
53	move_ob (object op, int dir, object originator)
54	{
55	sint16 newx = op->x + freearr_x[dir];
56	sint16 newy = op->y + freearr_y[dir];
57	object *tmp;
58	maptile *m;
59	int mflags;
60
61	if (op == NULL)
62	{
63	LOG (llevError, "Trying to move NULL.\n");
64	return 0;
65	}
66
67	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
76	/* 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
82	/* 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	if (op->more && !move_ob (op->more, dir, op->more->head))
87	return 0;
88
89	op->direction = dir;
90
91	if (op->will_apply & 4)
92	check_earthwalls (op, m, newx, newy);
93
94	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
107	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	}
113
114	/* 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
120	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
136	/* 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	}
146
147	/* insert_ob_in_map will deal with any tiling issues */
148	insert_ob_in_map (op, m, originator, 0);
149
150	return 1;
151	}
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	int
167	transfer_ob (object op, int x, int y, int randomly, object originator)
168	{
169	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	op->remove ();
183	for (tmp = op; tmp != NULL; tmp = tmp->more)
184	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
187	tmp = insert_ob_in_map (op, op->map, originator, 0);
188	if (tmp)
189	return 0;
190	else
191	return 1;
192	}
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	int
207	teleport (object teleporter, uint8 tele_type, object user)
208	{
209	object *altern;
210	int i, j, k, nrofalt = 0;
211	object other_teleporter, tmp;
212	maptile *m;
213	sint16 sx, sy;
214
215	if (user == NULL)
216	return 0;
217	if (user->head != NULL)
218	user = user->head;
219
220	/* 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	other_teleporter = GET_MAP_OB (teleporter->map, teleporter->x + i, teleporter->y + j);
233
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
244	if (!nrofalt)
245	{
246	LOG (llevError, "%s: no alternative teleporters around (user %s).\n",
247	teleporter->debug_desc (), user->debug_desc ());
248	return 0;
249	}
250
251	other_teleporter = altern;
252	k = find_free_spot (user, other_teleporter->map, other_teleporter->x, other_teleporter->y, 1, 9);
253
254	/* if k==-1, unable to find a free spot. If this is shop
255	* mat that the player is using, find someplace to move
256	* the player - otherwise, player can get trapped in the shops
257	* that appear in random dungeons. We basically just make
258	* sure the space isn't no pass (eg wall), and don't care
259	* about is alive.
260	*/
261	if (k == -1)
262	{
263	if (tele_type == SHOP_MAT && user->type == PLAYER)
264	{
265	for (k = 1; k < 9; k++)
266	{
267	if (get_map_flags (other_teleporter->map, &m,
268	other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k], &sx, &sy) & P_OUT_OF_MAP)
269	continue;
270
271	if (!OB_TYPE_MOVE_BLOCK (user, GET_MAP_MOVE_BLOCK (m, sx, sy)))
272	break;
273
274	}
275	if (k == 9)
276	{
277	LOG (llevError, "Shop mat %s (%d, %d) is in solid rock?\n",
278	&other_teleporter->name, other_teleporter->x, other_teleporter->y);
279	return 0;
280	}
281	}
282	else
283	return 0;
284	}
285
286	user->remove ();
287
288	/* Update location for the object */
289	for (tmp = user; tmp != NULL; tmp = tmp->more)
290	{
291	tmp->x = other_teleporter->x + freearr_x[k] + (tmp->arch == NULL ? 0 : tmp->arch->x);
292	tmp->y = other_teleporter->y + freearr_y[k] + (tmp->arch == NULL ? 0 : tmp->arch->y);
293	}
294	tmp = insert_ob_in_map (user, other_teleporter->map, NULL, 0);
295	return (tmp == NULL);
296	}
297
298	void
299	recursive_roll (object op, int dir, object pusher)
300	{
301	if (!roll_ob (op, dir, pusher))
302	{
303	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You fail to push the %s.", query_name (op));
304	return;
305	}
306	(void) move_ob (pusher, dir, pusher);
307	new_draw_info_format (NDI_BLACK, 0, pusher, "You move the %s.", query_name (op));
308	return;
309	}
310
311	/*
312	* This is a new version of blocked, this one handles objects
313	* that can be passed through by monsters with the CAN_PASS_THRU defined.
314	*
315	* very new version handles also multipart objects
316	* This is currently only used for the boulder roll code.
317	* Returns 1 if object does not fit, 0 if it does.
318	*/
319
320	int
321	try_fit (object op, maptile m, int x, int y)
322	{
323	object tmp, more;
324	sint16 tx, ty;
325	int mflags;
326	maptile *m2;
327
328	if (op->head)
329	op = op->head;
330
331	for (more = op; more; more = more->more)
332	{
333	tx = x + more->x - op->x;
334	ty = y + more->y - op->y;
335
336	mflags = get_map_flags (m, &m2, tx, ty, &tx, &ty);
337
338	if (mflags & P_OUT_OF_MAP)
339	return 1;
340
341	for (tmp = GET_MAP_OB (m2, tx, ty); tmp; tmp = tmp->above)
342	{
343	if (tmp->head == op \|\| tmp == op)
344	continue;
345
346	if ((QUERY_FLAG (tmp, FLAG_ALIVE) && tmp->type != DOOR))
347	return 1;
348
349	if (OB_MOVE_BLOCK (op, tmp))
350	return 1;
351
352	}
353	}
354	return 0;
355	}
356
357	/*
358	* this is not perfect yet.
359	* it does not roll objects behind multipart objects properly.
360	* Support for rolling multipart objects is questionable.
361	*/
362
363	int
364	roll_ob (object op, int dir, object pusher)
365	{
366	object *tmp;
367	sint16 x, y;
368	int flags;
369	maptile *m;
370	MoveType move_block;
371
372	if (op->head)
373	op = op->head;
374
375	x = op->x + freearr_x[dir];
376	y = op->y + freearr_y[dir];
377
378	if (!QUERY_FLAG (op, FLAG_CAN_ROLL) \|\| (op->weight && random_roll (0, op->weight / 50000 - 1, pusher, PREFER_LOW) > pusher->stats.Str))
379	return 0;
380
381	m = op->map;
382	flags = get_map_flags (m, &m, x, y, &x, &y);
383
384	if (flags & (P_OUT_OF_MAP \| P_IS_ALIVE))
385	return 0;
386
387	move_block = GET_MAP_MOVE_BLOCK (m, x, y);
388
389	/* If the target space is not blocked, no need to look at the objects on it */
390	if ((op->move_type & move_block) == op->move_type)
391	{
392	for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above)
393	{
394	if (tmp->head == op)
395	continue;
396	if (OB_MOVE_BLOCK (op, tmp) && !roll_ob (tmp, dir, pusher))
397	return 0;
398	}
399	}
400	if (try_fit (op, m, x, y))
401	return 0;
402
403	op->remove ();
404	for (tmp = op; tmp != NULL; tmp = tmp->more)
405	tmp->x += freearr_x[dir], tmp->y += freearr_y[dir];
406	insert_ob_in_map (op, op->map, pusher, 0);
407	return 1;
408	}
409
410	/* returns 1 if pushing invokes a attack, 0 when not */
411	int
412	push_ob (object who, int dir, object pusher)
413	{
414	int str1, str2;
415	object *owner;
416
417	if (who->head != NULL)
418	who = who->head;
419	owner = who->owner;
420
421	/* Wake up sleeping monsters that may be pushed */
422	CLEAR_FLAG (who, FLAG_SLEEP);
423
424	/* player change place with his pets or summoned creature */
425	/* TODO: allow multi arch pushing. Can't be very difficult */
426	if (who->more == NULL
427	&& ((owner && owner->contr && pusher->contr && same_party (owner->contr->party, pusher->contr->party))
428	\|\| owner == pusher)
429	)
430	{
431	int temp;
432	maptile *m;
433
434	who->remove ();
435	pusher->remove ();
436	temp = pusher->x;
437	pusher->x = who->x;
438	who->x = temp;
439
440	temp = pusher->y;
441	pusher->y = who->y;
442	who->y = temp;
443
444	m = pusher->map;
445	pusher->map = who->map;
446	who->map = m;
447
448	insert_ob_in_map (who, who->map, pusher, 0);
449	insert_ob_in_map (pusher, pusher->map, pusher, 0);
450	return 0;
451	}
452
453	/* We want ONLY become enemy of evil, unaggressive monster. We must RUN in them */
454	/* In original we have here a unaggressive check only - that was the reason why */
455	/* we so often become an enemy of friendly monsters... */
456	/* funny: was they set to unaggressive 0 (= not so nice) they don't attack */
457	if (owner != pusher && pusher->type == PLAYER && who->type != PLAYER &&
458	!QUERY_FLAG (who, FLAG_FRIENDLY) && !QUERY_FLAG (who, FLAG_NEUTRAL))
459	{
460	if (pusher->contr->run_on) /* only when we run */
461	{
462	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You start to attack %s!!", &who->name);
463	CLEAR_FLAG (who, FLAG_UNAGGRESSIVE); /* the sucker don't like you anymore */
464	who->enemy = pusher;
465	return 1;
466	}
467	else
468	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You avoid attacking %s.", &who->name);
469	}
470
471	/* now, lets test stand still. we NEVER can push stand_still monsters. */
472	if (QUERY_FLAG (who, FLAG_STAND_STILL))
473	{
474	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You can't push %s.", &who->name);
475	return 0;
476	}
477
478	/* This block is basically if you are pushing friendly but
479	* non pet creaturs.
480	* It basically does a random strength comparision to
481	* determine if you can push someone around. Note that
482	* this pushes the other person away - its not a swap.
483	*/
484
485	str1 = (who->stats.Str > 0 ? who->stats.Str : who->level);
486	str2 = (pusher->stats.Str > 0 ? pusher->stats.Str : pusher->level);
487	if (QUERY_FLAG (who, FLAG_WIZ) \|\|
488	random_roll (str1, str1 * 5 / 2, who, PREFER_HIGH) >=
489	random_roll (str2, str2 * 5 / 2, pusher, PREFER_HIGH) \|\| !move_object (who, dir))
490	{
491	if (who->type == PLAYER)
492	new_draw_info_format (NDI_UNIQUE, 0, who, "%s tried to push you.", &pusher->name);
493
494	return 0;
495	}
496
497	/* If we get here, the push succeeded.
498	* Let everyone know the status.
499	*/
500	if (who->type == PLAYER)
501	{
502	new_draw_info_format (NDI_UNIQUE, 0, who, "%s pushed you.", &pusher->name);
503	}
504	if (pusher->type == PLAYER)
505	{
506	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You pushed %s back.", &who->name);
507	}
508
509	return 1;
510	}