server/server/move.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 author can be reached via e-mail to <crossfire@schmorp.de>
*/

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

#ifdef COZY_SERVER
// use a ptotoype
extern int same_party (partylist *a, partylist *b);
#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->clone.x),
      tmp->y = y + freearr_y[i] + (tmp->arch == NULL ? 0 : tmp->arch->clone.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->clone.x);
      tmp->y = other_teleporter->y + freearr_y[k] + (tmp->arch == NULL ? 0 : tmp->arch->clone.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
#ifdef COZY_SERVER
      && ((owner && owner->contr && pusher->contr && same_party (owner->contr->party, pusher->contr->party)) || owner == pusher)
#else
      && owner == pusher
#endif
    )
    {
      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 / 2 + str1 * 2, who, PREFER_HIGH) >=
      random_roll (str2, str2 / 2 + str2 * 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:	1.14
Committed:	Sat Jan 6 14:42:31 2007 UTC (17 years, 4 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Changes since 1.13:	+1 -0 lines
Log Message:	added some copyrights
#	Content
1	/*
2	CrossFire, A Multiplayer game for X-windows
3
4	Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
5	Copyright (C) 2002 Mark Wedel & Crossfire Development Team
6	Copyright (C) 1992 Frank Tore Johansen
7
8	This program is free software; you can redistribute it and/or modify
9	it under the terms of the GNU General Public License as published by
10	the Free Software Foundation; either version 2 of the License, or
11	(at your option) any later version.
12
13	This program is distributed in the hope that it will be useful,
14	but WITHOUT ANY WARRANTY; without even the implied warranty of
15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	GNU General Public License for more details.
17
18	You should have received a copy of the GNU General Public License
19	along with this program; if not, write to the Free Software
20	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22	The author can be reached via e-mail to <crossfire@schmorp.de>
23	*/
24
25	#include <global.h>
26	#ifndef __CEXTRACT__
27	# include <sproto.h>
28	#endif
29
30	#ifdef COZY_SERVER
31	// use a ptotoype
32	extern int same_party (partylist a, partylist b);
33	#endif
34
35	/*
36	* move_object() tries to move object op in the direction "dir".
37	* If it fails (something blocks the passage), it returns 0,
38	* otherwise 1.
39	* This is an improvement from the previous move_ob(), which
40	* removed and inserted objects even if they were unable to move.
41	*/
42
43	int
44	move_object (object *op, int dir)
45	{
46	return move_ob (op, dir, op);
47	}
48
49
50	/* object op is trying to move in direction dir.
51	* originator is typically the same as op, but
52	* can be different if originator is causing op to
53	* move (originator is pushing op)
54	* returns 0 if the object is not able to move to the
55	* desired space, 1 otherwise (in which case we also
56	* move the object accordingly. This function is
57	* very similiar to move_object.
58	*/
59	int
60	move_ob (object op, int dir, object originator)
61	{
62	sint16 newx = op->x + freearr_x[dir];
63	sint16 newy = op->y + freearr_y[dir];
64	object *tmp;
65	maptile *m;
66	int mflags;
67
68	if (op == NULL)
69	{
70	LOG (llevError, "Trying to move NULL.\n");
71	return 0;
72	}
73
74	m = op->map;
75	mflags = get_map_flags (m, &m, newx, newy, &newx, &newy);
76
77	/* If the space the player is trying to is out of the map,
78	* bail now - we know it can't work.
79	*/
80	if (mflags & P_OUT_OF_MAP)
81	return 0;
82
83	/* Is this space blocked? Players with wizpass are immune to
84	* this condition.
85	*/
86	if (blocked_link (op, m, newx, newy) && !QUERY_FLAG (op, FLAG_WIZPASS))
87	return 0;
88
89	/* 0.94.2 - we need to set the direction for the new animation code.
90	* it uses it to figure out face to use - I can't see it
91	* breaking anything, but it might.
92	*/
93	if (op->more && !move_ob (op->more, dir, op->more->head))
94	return 0;
95
96	op->direction = dir;
97
98	if (op->will_apply & 4)
99	check_earthwalls (op, m, newx, newy);
100
101	if (op->will_apply & 8)
102	check_doors (op, m, newx, newy);
103
104	/* 0.94.1 - I got a stack trace that showed it crash with remove_ob trying
105	* to remove a removed object, and this function was the culprit. A possible
106	* guess I have is that check_doors above ran into a trap, killing the
107	* monster.
108	*
109	* Unfortunately, it doesn't appear that the calling functions of move_object
110	* deal very well with op being killed, so all this might do is just
111	* migrate the problem someplace else.
112	*/
113
114	if (QUERY_FLAG (op, FLAG_REMOVED))
115	{
116	LOG (llevDebug, "move_object: monster has been removed - will not process further\n");
117	/* Was not successful, but don't want to try and move again */
118	return 1;
119	}
120
121	/* If this is a tail portion, just want to tell caller that move is
122	* ok - the caller will deal with actual object removal/insertion
123	*/
124	if (op->head)
125	return 1;
126
127	if (m != op->map && op->contr)
128	{
129	if (INVOKE_MAP (LEAVE, op->map, ARG_PLAYER (op->contr)))
130	return 0;
131
132	op->remove ();
133
134	if (INVOKE_PLAYER (MAP_CHANGE, op->contr, ARG_MAP (m), ARG_INT (newx), ARG_INT (newy)))
135	return 0;
136
137	if (INVOKE_MAP (ENTER, m, ARG_PLAYER (op->contr), ARG_INT (newx), ARG_INT (newy)))
138	return 0;
139	}
140	else
141	op->remove ();
142
143	/* we already have newx, newy, and m, so lets use them.
144	* In addition, this fixes potential crashes, because multipart object was
145	* on edge of map, +=x, +=y doesn't make correct coordinates.
146	*/
147	for (tmp = op; tmp != NULL; tmp = tmp->more)
148	{
149	tmp->x += freearr_x[dir];
150	tmp->y += freearr_y[dir];
151	tmp->map = get_map_from_coord (tmp->map, &tmp->x, &tmp->y);
152	}
153
154	/* insert_ob_in_map will deal with any tiling issues */
155	insert_ob_in_map (op, m, originator, 0);
156
157	return 1;
158	}
159
160
161	/*
162	* transfer_ob(): Move an object (even linked objects) to another spot
163	* on the same map.
164	*
165	* Does nothing if there is no free spot.
166	*
167	* randomly: If true, use find_free_spot() to find the destination, otherwise
168	* use find_first_free_spot().
169	*
170	* Return value: 1 if object was destroyed, 0 otherwise.
171	*/
172
173	int
174	transfer_ob (object op, int x, int y, int randomly, object originator)
175	{
176	int i;
177	object *tmp;
178
179	if (randomly)
180	i = find_free_spot (op, op->map, x, y, 0, SIZEOFFREE);
181	else
182	i = find_first_free_spot (op, op->map, x, y);
183
184	if (i == -1)
185	return 0; /* No free spot */
186
187	if (op->head != NULL)
188	op = op->head;
189	op->remove ();
190	for (tmp = op; tmp != NULL; tmp = tmp->more)
191	tmp->x = x + freearr_x[i] + (tmp->arch == NULL ? 0 : tmp->arch->clone.x),
192	tmp->y = y + freearr_y[i] + (tmp->arch == NULL ? 0 : tmp->arch->clone.y);
193
194	tmp = insert_ob_in_map (op, op->map, originator, 0);
195	if (tmp)
196	return 0;
197	else
198	return 1;
199	}
200
201	/*
202	* Return value: 1 if object was destroyed, 0 otherwise.
203	* Modified so that instead of passing the 'originator' that had no
204	* real use, instead we pass the 'user' of the teleporter. All the
205	* callers know what they wanted to teleporter (move_teleporter or
206	* shop map code)
207	* tele_type is the type of teleporter we want to match against -
208	* currently, this is either set to SHOP_MAT or TELEPORTER.
209	* It is basically used so that shop_mats and normal teleporters can
210	* be used close to each other and not have the player put to the
211	* one of another type.
212	*/
213	int
214	teleport (object teleporter, uint8 tele_type, object user)
215	{
216	object *altern;
217	int i, j, k, nrofalt = 0;
218	object other_teleporter, tmp;
219	maptile *m;
220	sint16 sx, sy;
221
222	if (user == NULL)
223	return 0;
224	if (user->head != NULL)
225	user = user->head;
226
227	/* Find all other teleporters within range. This range
228	* should really be setable by some object attribute instead of
229	* using hard coded values.
230	*/
231	for (i = -5; i < 6; i++)
232	for (j = -5; j < 6; j++)
233	{
234	if (i == 0 && j == 0)
235	continue;
236	/* Perhaps this should be extended to support tiled maps */
237	if (OUT_OF_REAL_MAP (teleporter->map, teleporter->x + i, teleporter->y + j))
238	continue;
239	other_teleporter = GET_MAP_OB (teleporter->map, teleporter->x + i, teleporter->y + j);
240
241	while (other_teleporter)
242	{
243	if (other_teleporter->type == tele_type)
244	break;
245	other_teleporter = other_teleporter->above;
246	}
247	if (other_teleporter && !(RANDOM () % ++nrofalt))
248	altern = other_teleporter;
249	}
250
251	if (!nrofalt)
252	{
253	LOG (llevError, "No alternative teleporters around!\n");
254	return 0;
255	}
256
257	other_teleporter = altern;
258	k = find_free_spot (user, other_teleporter->map, other_teleporter->x, other_teleporter->y, 1, 9);
259
260	/* if k==-1, unable to find a free spot. If this is shop
261	* mat that the player is using, find someplace to move
262	* the player - otherwise, player can get trapped in the shops
263	* that appear in random dungeons. We basically just make
264	* sure the space isn't no pass (eg wall), and don't care
265	* about is alive.
266	*/
267	if (k == -1)
268	{
269	if (tele_type == SHOP_MAT && user->type == PLAYER)
270	{
271	for (k = 1; k < 9; k++)
272	{
273	if (get_map_flags (other_teleporter->map, &m,
274	other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k], &sx, &sy) & P_OUT_OF_MAP)
275	continue;
276
277	if (!OB_TYPE_MOVE_BLOCK (user, GET_MAP_MOVE_BLOCK (m, sx, sy)))
278	break;
279
280	}
281	if (k == 9)
282	{
283	LOG (llevError, "Shop mat %s (%d, %d) is in solid rock?\n",
284	&other_teleporter->name, other_teleporter->x, other_teleporter->y);
285	return 0;
286	}
287	}
288	else
289	return 0;
290	}
291
292	user->remove ();
293
294	/* Update location for the object */
295	for (tmp = user; tmp != NULL; tmp = tmp->more)
296	{
297	tmp->x = other_teleporter->x + freearr_x[k] + (tmp->arch == NULL ? 0 : tmp->arch->clone.x);
298	tmp->y = other_teleporter->y + freearr_y[k] + (tmp->arch == NULL ? 0 : tmp->arch->clone.y);
299	}
300	tmp = insert_ob_in_map (user, other_teleporter->map, NULL, 0);
301	return (tmp == NULL);
302	}
303
304	void
305	recursive_roll (object op, int dir, object pusher)
306	{
307	if (!roll_ob (op, dir, pusher))
308	{
309	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You fail to push the %s.", query_name (op));
310	return;
311	}
312	(void) move_ob (pusher, dir, pusher);
313	new_draw_info_format (NDI_BLACK, 0, pusher, "You move the %s.", query_name (op));
314	return;
315	}
316
317	/*
318	* This is a new version of blocked, this one handles objects
319	* that can be passed through by monsters with the CAN_PASS_THRU defined.
320	*
321	* very new version handles also multipart objects
322	* This is currently only used for the boulder roll code.
323	* Returns 1 if object does not fit, 0 if it does.
324	*/
325
326	int
327	try_fit (object op, maptile m, int x, int y)
328	{
329	object tmp, more;
330	sint16 tx, ty;
331	int mflags;
332	maptile *m2;
333
334	if (op->head)
335	op = op->head;
336
337	for (more = op; more; more = more->more)
338	{
339	tx = x + more->x - op->x;
340	ty = y + more->y - op->y;
341
342	mflags = get_map_flags (m, &m2, tx, ty, &tx, &ty);
343
344	if (mflags & P_OUT_OF_MAP)
345	return 1;
346
347	for (tmp = GET_MAP_OB (m2, tx, ty); tmp; tmp = tmp->above)
348	{
349	if (tmp->head == op \|\| tmp == op)
350	continue;
351
352	if ((QUERY_FLAG (tmp, FLAG_ALIVE) && tmp->type != DOOR))
353	return 1;
354
355	if (OB_MOVE_BLOCK (op, tmp))
356	return 1;
357
358	}
359	}
360	return 0;
361	}
362
363	/*
364	* this is not perfect yet.
365	* it does not roll objects behind multipart objects properly.
366	* Support for rolling multipart objects is questionable.
367	*/
368
369	int
370	roll_ob (object op, int dir, object pusher)
371	{
372	object *tmp;
373	sint16 x, y;
374	int flags;
375	maptile *m;
376	MoveType move_block;
377
378	if (op->head)
379	op = op->head;
380
381	x = op->x + freearr_x[dir];
382	y = op->y + freearr_y[dir];
383
384	if (!QUERY_FLAG (op, FLAG_CAN_ROLL) \|\| (op->weight && random_roll (0, op->weight / 50000 - 1, pusher, PREFER_LOW) > pusher->stats.Str))
385	return 0;
386
387	m = op->map;
388	flags = get_map_flags (m, &m, x, y, &x, &y);
389
390	if (flags & (P_OUT_OF_MAP \| P_IS_ALIVE))
391	return 0;
392
393	move_block = GET_MAP_MOVE_BLOCK (m, x, y);
394
395	/* If the target space is not blocked, no need to look at the objects on it */
396	if ((op->move_type & move_block) == op->move_type)
397	{
398	for (tmp = GET_MAP_OB (m, x, y); tmp != NULL; tmp = tmp->above)
399	{
400	if (tmp->head == op)
401	continue;
402	if (OB_MOVE_BLOCK (op, tmp) && !roll_ob (tmp, dir, pusher))
403	return 0;
404	}
405	}
406	if (try_fit (op, m, x, y))
407	return 0;
408
409	op->remove ();
410	for (tmp = op; tmp != NULL; tmp = tmp->more)
411	tmp->x += freearr_x[dir], tmp->y += freearr_y[dir];
412	insert_ob_in_map (op, op->map, pusher, 0);
413	return 1;
414	}
415
416	/* returns 1 if pushing invokes a attack, 0 when not */
417	int
418	push_ob (object who, int dir, object pusher)
419	{
420	int str1, str2;
421	object *owner;
422
423	if (who->head != NULL)
424	who = who->head;
425	owner = who->owner;
426
427	/* Wake up sleeping monsters that may be pushed */
428	CLEAR_FLAG (who, FLAG_SLEEP);
429
430	/* player change place with his pets or summoned creature */
431	/* TODO: allow multi arch pushing. Can't be very difficult */
432	if (who->more == NULL
433	#ifdef COZY_SERVER
434	&& ((owner && owner->contr && pusher->contr && same_party (owner->contr->party, pusher->contr->party)) \|\| owner == pusher)
435	#else
436	&& owner == pusher
437	#endif
438	)
439	{
440	int temp;
441	maptile *m;
442
443	who->remove ();
444	pusher->remove ();
445	temp = pusher->x;
446	pusher->x = who->x;
447	who->x = temp;
448
449	temp = pusher->y;
450	pusher->y = who->y;
451	who->y = temp;
452
453	m = pusher->map;
454	pusher->map = who->map;
455	who->map = m;
456
457	insert_ob_in_map (who, who->map, pusher, 0);
458	insert_ob_in_map (pusher, pusher->map, pusher, 0);
459	return 0;
460	}
461
462
463	/* We want ONLY become enemy of evil, unaggressive monster. We must RUN in them */
464	/* In original we have here a unaggressive check only - that was the reason why */
465	/* we so often become an enemy of friendly monsters... */
466	/* funny: was they set to unaggressive 0 (= not so nice) they don't attack */
467
468	if (owner != pusher && pusher->type == PLAYER && who->type != PLAYER &&
469	!QUERY_FLAG (who, FLAG_FRIENDLY) && !QUERY_FLAG (who, FLAG_NEUTRAL))
470	{
471	if (pusher->contr->run_on) /* only when we run */
472	{
473	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You start to attack %s !!", &who->name);
474	CLEAR_FLAG (who, FLAG_UNAGGRESSIVE); /* the sucker don't like you anymore */
475	who->enemy = pusher;
476	return 1;
477	}
478	else
479	{
480	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You avoid attacking %s.", &who->name);
481	}
482	}
483
484	/* now, lets test stand still. we NEVER can push stand_still monsters. */
485	if (QUERY_FLAG (who, FLAG_STAND_STILL))
486	{
487	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You can't push %s.", &who->name);
488	return 0;
489	}
490
491	/* This block is basically if you are pushing friendly but
492	* non pet creaturs.
493	* It basically does a random strength comparision to
494	* determine if you can push someone around. Note that
495	* this pushes the other person away - its not a swap.
496	*/
497
498	str1 = (who->stats.Str > 0 ? who->stats.Str : who->level);
499	str2 = (pusher->stats.Str > 0 ? pusher->stats.Str : pusher->level);
500	if (QUERY_FLAG (who, FLAG_WIZ) \|\|
501	random_roll (str1, str1 / 2 + str1 * 2, who, PREFER_HIGH) >=
502	random_roll (str2, str2 / 2 + str2 * 2, pusher, PREFER_HIGH) \|\| !move_object (who, dir))
503	{
504	if (who->type == PLAYER)
505	{
506	new_draw_info_format (NDI_UNIQUE, 0, who, "%s tried to push you.", &pusher->name);
507	}
508	return 0;
509	}
510
511	/* If we get here, the push succeeded.
512	* Let everyone know the status.
513	*/
514	if (who->type == PLAYER)
515	{
516	new_draw_info_format (NDI_UNIQUE, 0, who, "%s pushed you.", &pusher->name);
517	}
518	if (pusher->type == PLAYER)
519	{
520	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You pushed %s back.", &who->name);
521	}
522
523	return 1;
524	}