server/server/move.C


/*
 * static char *rcsid_move_c =
 *    "$Id: move.C,v 1.6 2006-09-03 00:18:42 root Exp $";
 */

/*
    CrossFire, A Multiplayer game for X-windows

    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-devel@real-time.com
*/

#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;
  mapstruct *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 != NULL && !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;

  remove_ob (op);

  /* 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;
  remove_ob (op);
  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;
  mapstruct *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;
    }

  remove_ob (user);

  /* 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, mapstruct *m, int x, int y)
{
  object *tmp, *more;
  sint16 tx, ty;
  int mflags;
  mapstruct *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;
  mapstruct *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;

  remove_ob (op);
  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 = get_owner (who);

  /* 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;
      mapstruct *m;

      remove_ob (who);
      remove_ob (pusher);
      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:	1.7
Committed:	Sun Sep 10 15:59:57 2006 UTC (17 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.6:	+333 -312 lines
Log Message:	indent
#	User	Rev	Content
1	root	1.7
2	elmex	1.1	/*
3			* static char *rcsid_move_c =
4	root	1.7	* "$Id: move.C,v 1.6 2006-09-03 00:18:42 root Exp $";
5	elmex	1.1	*/
6
7			/*
8			CrossFire, A Multiplayer game for X-windows
9
10			Copyright (C) 2002 Mark Wedel & Crossfire Development Team
11			Copyright (C) 1992 Frank Tore Johansen
12
13			This program is free software; you can redistribute it and/or modify
14			it under the terms of the GNU General Public License as published by
15			the Free Software Foundation; either version 2 of the License, or
16			(at your option) any later version.
17
18			This program is distributed in the hope that it will be useful,
19			but WITHOUT ANY WARRANTY; without even the implied warranty of
20			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21			GNU General Public License for more details.
22
23			You should have received a copy of the GNU General Public License
24			along with this program; if not, write to the Free Software
25			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26
27			The author can be reached via e-mail to crossfire-devel@real-time.com
28			*/
29
30			#include <global.h>
31			#ifndef __CEXTRACT__
32	root	1.7	# include <sproto.h>
33	elmex	1.1	#endif
34
35			#ifdef COZY_SERVER
36			// use a ptotoype
37			extern int same_party (partylist a, partylist b);
38			#endif
39
40			/*
41			* move_object() tries to move object op in the direction "dir".
42			* If it fails (something blocks the passage), it returns 0,
43			* otherwise 1.
44			* This is an improvement from the previous move_ob(), which
45			* removed and inserted objects even if they were unable to move.
46			*/
47
48	root	1.7	int
49			move_object (object *op, int dir)
50			{
51			return move_ob (op, dir, op);
52	elmex	1.1	}
53
54
55			/* object op is trying to move in direction dir.
56			* originator is typically the same as op, but
57			* can be different if originator is causing op to
58			* move (originator is pushing op)
59			* returns 0 if the object is not able to move to the
60			* desired space, 1 otherwise (in which case we also
61			* move the object accordingly. This function is
62			* very similiar to move_object.
63			*/
64	root	1.7	int
65			move_ob (object op, int dir, object originator)
66	elmex	1.1	{
67	root	1.7	sint16 newx = op->x + freearr_x[dir];
68			sint16 newy = op->y + freearr_y[dir];
69			object *tmp;
70			mapstruct *m;
71			int mflags;
72	elmex	1.1
73	root	1.7	if (op == NULL)
74			{
75			LOG (llevError, "Trying to move NULL.\n");
76			return 0;
77	elmex	1.1	}
78
79	root	1.7	m = op->map;
80			mflags = get_map_flags (m, &m, newx, newy, &newx, &newy);
81
82			/* If the space the player is trying to is out of the map,
83			* bail now - we know it can't work.
84			*/
85			if (mflags & P_OUT_OF_MAP)
86			return 0;
87	elmex	1.1
88
89	root	1.7	/* Is this space blocked? Players with wizpass are immune to
90			* this condition.
91			*/
92			if (blocked_link (op, m, newx, newy) && !QUERY_FLAG (op, FLAG_WIZPASS))
93			return 0;
94	elmex	1.1
95	root	1.7	/* 0.94.2 - we need to set the direction for the new animation code.
96			* it uses it to figure out face to use - I can't see it
97			* breaking anything, but it might.
98			*/
99			if (op->more != NULL && !move_ob (op->more, dir, op->more->head))
100			return 0;
101	elmex	1.1
102	root	1.7	op->direction = dir;
103	elmex	1.1
104	root	1.7	if (op->will_apply & 4)
105			check_earthwalls (op, m, newx, newy);
106			if (op->will_apply & 8)
107			check_doors (op, m, newx, newy);
108
109			/* 0.94.1 - I got a stack trace that showed it crash with remove_ob trying
110			* to remove a removed object, and this function was the culprit. A possible
111			* guess I have is that check_doors above ran into a trap, killing the
112			* monster.
113			*
114			* Unfortunately, it doesn't appear that the calling functions of move_object
115			* deal very well with op being killed, so all this might do is just
116			* migrate the problem someplace else.
117			*/
118	elmex	1.1
119	root	1.7	if (QUERY_FLAG (op, FLAG_REMOVED))
120			{
121			LOG (llevDebug, "move_object: monster has been removed - will not process further\n");
122			/* Was not successful, but don't want to try and move again */
123			return 1;
124	elmex	1.1	}
125
126	root	1.7	/* If this is a tail portion, just want to tell caller that move is
127			* ok - the caller will deal with actual object removal/insertion
128			*/
129			if (op->head)
130			return 1;
131	elmex	1.1
132	root	1.7	remove_ob (op);
133	elmex	1.1
134	root	1.7	/* we already have newx, newy, and m, so lets use them.
135			* In addition, this fixes potential crashes, because multipart object was
136			* on edge of map, +=x, +=y doesn't make correct coordinates.
137			*/
138			for (tmp = op; tmp != NULL; tmp = tmp->more)
139			{
140			tmp->x += freearr_x[dir];
141			tmp->y += freearr_y[dir];
142			tmp->map = get_map_from_coord (tmp->map, &tmp->x, &tmp->y);
143	elmex	1.1	}
144
145	root	1.7	/* insert_ob_in_map will deal with any tiling issues */
146			insert_ob_in_map (op, m, originator, 0);
147	elmex	1.1
148	root	1.7	return 1;
149	elmex	1.1	}
150
151
152			/*
153			* transfer_ob(): Move an object (even linked objects) to another spot
154			* on the same map.
155			*
156			* Does nothing if there is no free spot.
157			*
158			* randomly: If true, use find_free_spot() to find the destination, otherwise
159			* use find_first_free_spot().
160			*
161			* Return value: 1 if object was destroyed, 0 otherwise.
162			*/
163
164	root	1.7	int
165			transfer_ob (object op, int x, int y, int randomly, object originator)
166	elmex	1.1	{
167	root	1.7	int i;
168			object *tmp;
169
170			if (randomly)
171			i = find_free_spot (op, op->map, x, y, 0, SIZEOFFREE);
172			else
173			i = find_first_free_spot (op, op->map, x, y);
174
175			if (i == -1)
176			return 0; /* No free spot */
177
178			if (op->head != NULL)
179			op = op->head;
180			remove_ob (op);
181			for (tmp = op; tmp != NULL; tmp = tmp->more)
182			tmp->x = x + freearr_x[i] + (tmp->arch == NULL ? 0 : tmp->arch->clone.x),
183			tmp->y = y + freearr_y[i] + (tmp->arch == NULL ? 0 : tmp->arch->clone.y);
184	elmex	1.1
185	root	1.7	tmp = insert_ob_in_map (op, op->map, originator, 0);
186			if (tmp)
187			return 0;
188			else
189			return 1;
190	elmex	1.1	}
191
192			/*
193			* Return value: 1 if object was destroyed, 0 otherwise.
194			* Modified so that instead of passing the 'originator' that had no
195			* real use, instead we pass the 'user' of the teleporter. All the
196			* callers know what they wanted to teleporter (move_teleporter or
197			* shop map code)
198			* tele_type is the type of teleporter we want to match against -
199			* currently, this is either set to SHOP_MAT or TELEPORTER.
200			* It is basically used so that shop_mats and normal teleporters can
201			* be used close to each other and not have the player put to the
202			* one of another type.
203			*/
204	root	1.7	int
205			teleport (object teleporter, uint8 tele_type, object user)
206	elmex	1.1	{
207	root	1.7	object *altern;
208			int i, j, k, nrofalt = 0;
209			object other_teleporter, tmp;
210			mapstruct *m;
211			sint16 sx, sy;
212
213			if (user == NULL)
214			return 0;
215			if (user->head != NULL)
216			user = user->head;
217	elmex	1.1
218	root	1.7	/* Find all other teleporters within range. This range
219			* should really be setable by some object attribute instead of
220			* using hard coded values.
221			*/
222			for (i = -5; i < 6; i++)
223			for (j = -5; j < 6; j++)
224			{
225			if (i == 0 && j == 0)
226			continue;
227			/* Perhaps this should be extended to support tiled maps */
228			if (OUT_OF_REAL_MAP (teleporter->map, teleporter->x + i, teleporter->y + j))
229			continue;
230			other_teleporter = get_map_ob (teleporter->map, teleporter->x + i, teleporter->y + j);
231
232			while (other_teleporter)
233			{
234			if (other_teleporter->type == tele_type)
235			break;
236			other_teleporter = other_teleporter->above;
237			}
238			if (other_teleporter && !(RANDOM () % ++nrofalt))
239			altern = other_teleporter;
240			}
241	elmex	1.1
242	root	1.7	if (!nrofalt)
243			{
244			LOG (llevError, "No alternative teleporters around!\n");
245			return 0;
246	elmex	1.1	}
247
248	root	1.7	other_teleporter = altern;
249			k = find_free_spot (user, other_teleporter->map, other_teleporter->x, other_teleporter->y, 1, 9);
250
251			/* if k==-1, unable to find a free spot. If this is shop
252			* mat that the player is using, find someplace to move
253			* the player - otherwise, player can get trapped in the shops
254			* that appear in random dungeons. We basically just make
255			* sure the space isn't no pass (eg wall), and don't care
256			* about is alive.
257			*/
258			if (k == -1)
259			{
260			if (tele_type == SHOP_MAT && user->type == PLAYER)
261			{
262			for (k = 1; k < 9; k++)
263			{
264			if (get_map_flags (other_teleporter->map, &m,
265			other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k], &sx, &sy) & P_OUT_OF_MAP)
266			continue;
267	root	1.4
268	root	1.7	if (!OB_TYPE_MOVE_BLOCK (user, GET_MAP_MOVE_BLOCK (m, sx, sy)))
269			break;
270	root	1.4
271			}
272	root	1.7	if (k == 9)
273			{
274			LOG (llevError, "Shop mat %s (%d, %d) is in solid rock?\n",
275			&other_teleporter->name, other_teleporter->x, other_teleporter->y);
276			return 0;
277	root	1.4	}
278			}
279	root	1.7	else
280			return 0;
281	elmex	1.1	}
282
283	root	1.7	remove_ob (user);
284	elmex	1.1
285	root	1.7	/* Update location for the object */
286			for (tmp = user; tmp != NULL; tmp = tmp->more)
287			{
288			tmp->x = other_teleporter->x + freearr_x[k] + (tmp->arch == NULL ? 0 : tmp->arch->clone.x);
289			tmp->y = other_teleporter->y + freearr_y[k] + (tmp->arch == NULL ? 0 : tmp->arch->clone.y);
290	elmex	1.1	}
291	root	1.7	tmp = insert_ob_in_map (user, other_teleporter->map, NULL, 0);
292			return (tmp == NULL);
293	elmex	1.1	}
294
295	root	1.7	void
296			recursive_roll (object op, int dir, object pusher)
297			{
298			if (!roll_ob (op, dir, pusher))
299			{
300			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You fail to push the %s.", query_name (op));
301			return;
302			}
303			(void) move_ob (pusher, dir, pusher);
304			new_draw_info_format (NDI_BLACK, 0, pusher, "You move the %s.", query_name (op));
305	elmex	1.1	return;
306			}
307
308			/*
309			* This is a new version of blocked, this one handles objects
310			* that can be passed through by monsters with the CAN_PASS_THRU defined.
311			*
312			* very new version handles also multipart objects
313			* This is currently only used for the boulder roll code.
314			* Returns 1 if object does not fit, 0 if it does.
315			*/
316
317	root	1.7	int
318			try_fit (object op, mapstruct m, int x, int y)
319	elmex	1.1	{
320	root	1.7	object tmp, more;
321			sint16 tx, ty;
322			int mflags;
323			mapstruct *m2;
324	elmex	1.1
325	root	1.7	if (op->head)
326			op = op->head;
327	elmex	1.1
328	root	1.7	for (more = op; more; more = more->more)
329			{
330			tx = x + more->x - op->x;
331			ty = y + more->y - op->y;
332	elmex	1.1
333	root	1.7	mflags = get_map_flags (m, &m2, tx, ty, &tx, &ty);
334	elmex	1.1
335	root	1.7	if (mflags & P_OUT_OF_MAP)
336			return 1;
337	elmex	1.1
338	root	1.7	for (tmp = get_map_ob (m2, tx, ty); tmp; tmp = tmp->above)
339			{
340			if (tmp->head == op \|\| tmp == op)
341			continue;
342	elmex	1.1
343	root	1.7	if ((QUERY_FLAG (tmp, FLAG_ALIVE) && tmp->type != DOOR))
344			return 1;
345	elmex	1.1
346	root	1.7	if (OB_MOVE_BLOCK (op, tmp))
347			return 1;
348	elmex	1.1
349	root	1.4	}
350	elmex	1.1	}
351	root	1.7	return 0;
352	elmex	1.1	}
353
354			/*
355			* this is not perfect yet.
356			* it does not roll objects behind multipart objects properly.
357			* Support for rolling multipart objects is questionable.
358			*/
359
360	root	1.7	int
361			roll_ob (object op, int dir, object pusher)
362			{
363			object *tmp;
364			sint16 x, y;
365			int flags;
366			mapstruct *m;
367			MoveType move_block;
368
369			if (op->head)
370			op = op->head;
371
372			x = op->x + freearr_x[dir];
373			y = op->y + freearr_y[dir];
374
375			if (!QUERY_FLAG (op, FLAG_CAN_ROLL) \|\| (op->weight && random_roll (0, op->weight / 50000 - 1, pusher, PREFER_LOW) > pusher->stats.Str))
376			return 0;
377	elmex	1.1
378	root	1.7	m = op->map;
379			flags = get_map_flags (m, &m, x, y, &x, &y);
380	elmex	1.1
381	root	1.7	if (flags & (P_OUT_OF_MAP \| P_IS_ALIVE))
382			return 0;
383	elmex	1.1
384	root	1.7	move_block = GET_MAP_MOVE_BLOCK (m, x, y);
385	elmex	1.1
386	root	1.7	/* If the target space is not blocked, no need to look at the objects on it */
387			if ((op->move_type & move_block) == op->move_type)
388			{
389			for (tmp = get_map_ob (m, x, y); tmp != NULL; tmp = tmp->above)
390			{
391			if (tmp->head == op)
392	root	1.4	continue;
393	root	1.7	if (OB_MOVE_BLOCK (op, tmp) && !roll_ob (tmp, dir, pusher))
394	root	1.4	return 0;
395			}
396	elmex	1.1	}
397	root	1.7	if (try_fit (op, m, x, y))
398			return 0;
399	elmex	1.1
400	root	1.7	remove_ob (op);
401			for (tmp = op; tmp != NULL; tmp = tmp->more)
402			tmp->x += freearr_x[dir], tmp->y += freearr_y[dir];
403			insert_ob_in_map (op, op->map, pusher, 0);
404			return 1;
405	elmex	1.1	}
406
407			/* returns 1 if pushing invokes a attack, 0 when not */
408	root	1.7	int
409			push_ob (object who, int dir, object pusher)
410			{
411			int str1, str2;
412			object *owner;
413
414			if (who->head != NULL)
415			who = who->head;
416			owner = get_owner (who);
417
418			/* Wake up sleeping monsters that may be pushed */
419			CLEAR_FLAG (who, FLAG_SLEEP);
420
421			/* player change place with his pets or summoned creature */
422			/* TODO: allow multi arch pushing. Can't be very difficult */
423			if (who->more == NULL
424	elmex	1.1	#ifdef COZY_SERVER
425	root	1.7	&& ((owner && owner->contr && pusher->contr && same_party (owner->contr->party, pusher->contr->party)) \|\| owner == pusher)
426	elmex	1.1	#else
427	root	1.7	&& owner == pusher
428	elmex	1.1	#endif
429	root	1.7	)
430			{
431			int temp;
432			mapstruct *m;
433
434			remove_ob (who);
435			remove_ob (pusher);
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	root	1.4
444	root	1.7	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	elmex	1.1	}
452
453
454	root	1.7	/* We want ONLY become enemy of evil, unaggressive monster. We must RUN in them */
455			/* In original we have here a unaggressive check only - that was the reason why */
456			/* we so often become an enemy of friendly monsters... */
457			/* funny: was they set to unaggressive 0 (= not so nice) they don't attack */
458
459			if (owner != pusher && pusher->type == PLAYER && who->type != PLAYER &&
460			!QUERY_FLAG (who, FLAG_FRIENDLY) && !QUERY_FLAG (who, FLAG_NEUTRAL))
461			{
462			if (pusher->contr->run_on) /* only when we run */
463			{
464			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You start to attack %s !!", &who->name);
465			CLEAR_FLAG (who, FLAG_UNAGGRESSIVE); /* the sucker don't like you anymore */
466			who->enemy = pusher;
467			return 1;
468	root	1.4	}
469	root	1.7	else
470	root	1.4	{
471	root	1.7	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You avoid attacking %s.", &who->name);
472	root	1.4	}
473	elmex	1.1	}
474
475	root	1.7	/* now, lets test stand still. we NEVER can push stand_still monsters. */
476			if (QUERY_FLAG (who, FLAG_STAND_STILL))
477	elmex	1.1	{
478	root	1.7	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You can't push %s.", &who->name);
479			return 0;
480	elmex	1.1	}
481	root	1.7
482			/* This block is basically if you are pushing friendly but
483			* non pet creaturs.
484			* It basically does a random strength comparision to
485			* determine if you can push someone around. Note that
486			* this pushes the other person away - its not a swap.
487			*/
488
489			str1 = (who->stats.Str > 0 ? who->stats.Str : who->level);
490			str2 = (pusher->stats.Str > 0 ? pusher->stats.Str : pusher->level);
491			if (QUERY_FLAG (who, FLAG_WIZ) \|\|
492			random_roll (str1, str1 / 2 + str1 * 2, who, PREFER_HIGH) >=
493			random_roll (str2, str2 / 2 + str2 * 2, pusher, PREFER_HIGH) \|\| !move_object (who, dir))
494			{
495			if (who->type == PLAYER)
496			{
497			new_draw_info_format (NDI_UNIQUE, 0, who, "%s tried to push you.", &pusher->name);
498	root	1.4	}
499	root	1.7	return 0;
500	elmex	1.1	}
501
502	root	1.7	/* If we get here, the push succeeded.
503			* Let everyone know the status.
504			*/
505			if (who->type == PLAYER)
506			{
507			new_draw_info_format (NDI_UNIQUE, 0, who, "%s pushed you.", &pusher->name);
508	elmex	1.1	}
509	root	1.7	if (pusher->type == PLAYER)
510			{
511			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You pushed %s back.", &who->name);
512			}
513
514			return 1;
515	elmex	1.1	}