server/server/move.C

/*
    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@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 != 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;

  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 = 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;
      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:	1.10
Committed:	Tue Dec 12 20:53:03 2006 UTC (17 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.9:	+6 -6 lines
Log Message:	replace some function- by method-calls
#	User	Rev	Content
1	elmex	1.1	/*
2			CrossFire, A Multiplayer game for X-windows
3
4			Copyright (C) 2002 Mark Wedel & Crossfire Development Team
5			Copyright (C) 1992 Frank Tore Johansen
6
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21	root	1.8	The author can be reached via e-mail to <crossfire@schmorp.de>
22	elmex	1.1	*/
23
24			#include <global.h>
25			#ifndef __CEXTRACT__
26	root	1.7	# include <sproto.h>
27	elmex	1.1	#endif
28
29			#ifdef COZY_SERVER
30			// use a ptotoype
31			extern int same_party (partylist a, partylist b);
32			#endif
33
34			/*
35			* move_object() tries to move object op in the direction "dir".
36			* If it fails (something blocks the passage), it returns 0,
37			* otherwise 1.
38			* This is an improvement from the previous move_ob(), which
39			* removed and inserted objects even if they were unable to move.
40			*/
41
42	root	1.7	int
43			move_object (object *op, int dir)
44			{
45			return move_ob (op, dir, op);
46	elmex	1.1	}
47
48
49			/* object op is trying to move in direction dir.
50			* originator is typically the same as op, but
51			* can be different if originator is causing op to
52			* move (originator is pushing op)
53			* returns 0 if the object is not able to move to the
54			* desired space, 1 otherwise (in which case we also
55			* move the object accordingly. This function is
56			* very similiar to move_object.
57			*/
58	root	1.7	int
59			move_ob (object op, int dir, object originator)
60	elmex	1.1	{
61	root	1.7	sint16 newx = op->x + freearr_x[dir];
62			sint16 newy = op->y + freearr_y[dir];
63			object *tmp;
64	root	1.9	maptile *m;
65	root	1.7	int mflags;
66	elmex	1.1
67	root	1.7	if (op == NULL)
68			{
69			LOG (llevError, "Trying to move NULL.\n");
70			return 0;
71	elmex	1.1	}
72
73	root	1.7	m = op->map;
74			mflags = get_map_flags (m, &m, newx, newy, &newx, &newy);
75
76			/* If the space the player is trying to is out of the map,
77			* bail now - we know it can't work.
78			*/
79			if (mflags & P_OUT_OF_MAP)
80			return 0;
81	elmex	1.1
82
83	root	1.7	/* 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	elmex	1.1
89	root	1.7	/* 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 != NULL && !move_ob (op->more, dir, op->more->head))
94			return 0;
95	elmex	1.1
96	root	1.7	op->direction = dir;
97	elmex	1.1
98	root	1.7	if (op->will_apply & 4)
99			check_earthwalls (op, m, newx, newy);
100			if (op->will_apply & 8)
101			check_doors (op, m, newx, newy);
102
103			/* 0.94.1 - I got a stack trace that showed it crash with remove_ob trying
104			* to remove a removed object, and this function was the culprit. A possible
105			* guess I have is that check_doors above ran into a trap, killing the
106			* monster.
107			*
108			* Unfortunately, it doesn't appear that the calling functions of move_object
109			* deal very well with op being killed, so all this might do is just
110			* migrate the problem someplace else.
111			*/
112	elmex	1.1
113	root	1.7	if (QUERY_FLAG (op, FLAG_REMOVED))
114			{
115			LOG (llevDebug, "move_object: monster has been removed - will not process further\n");
116			/* Was not successful, but don't want to try and move again */
117			return 1;
118	elmex	1.1	}
119
120	root	1.7	/* If this is a tail portion, just want to tell caller that move is
121			* ok - the caller will deal with actual object removal/insertion
122			*/
123			if (op->head)
124			return 1;
125	elmex	1.1
126	root	1.10	op->remove ();
127	elmex	1.1
128	root	1.7	/* we already have newx, newy, and m, so lets use them.
129			* In addition, this fixes potential crashes, because multipart object was
130			* on edge of map, +=x, +=y doesn't make correct coordinates.
131			*/
132			for (tmp = op; tmp != NULL; tmp = tmp->more)
133			{
134			tmp->x += freearr_x[dir];
135			tmp->y += freearr_y[dir];
136			tmp->map = get_map_from_coord (tmp->map, &tmp->x, &tmp->y);
137	elmex	1.1	}
138
139	root	1.7	/* insert_ob_in_map will deal with any tiling issues */
140			insert_ob_in_map (op, m, originator, 0);
141	elmex	1.1
142	root	1.7	return 1;
143	elmex	1.1	}
144
145
146			/*
147			* transfer_ob(): Move an object (even linked objects) to another spot
148			* on the same map.
149			*
150			* Does nothing if there is no free spot.
151			*
152			* randomly: If true, use find_free_spot() to find the destination, otherwise
153			* use find_first_free_spot().
154			*
155			* Return value: 1 if object was destroyed, 0 otherwise.
156			*/
157
158	root	1.7	int
159			transfer_ob (object op, int x, int y, int randomly, object originator)
160	elmex	1.1	{
161	root	1.7	int i;
162			object *tmp;
163
164			if (randomly)
165			i = find_free_spot (op, op->map, x, y, 0, SIZEOFFREE);
166			else
167			i = find_first_free_spot (op, op->map, x, y);
168
169			if (i == -1)
170			return 0; /* No free spot */
171
172			if (op->head != NULL)
173			op = op->head;
174	root	1.10	op->remove ();
175	root	1.7	for (tmp = op; tmp != NULL; tmp = tmp->more)
176			tmp->x = x + freearr_x[i] + (tmp->arch == NULL ? 0 : tmp->arch->clone.x),
177			tmp->y = y + freearr_y[i] + (tmp->arch == NULL ? 0 : tmp->arch->clone.y);
178	elmex	1.1
179	root	1.7	tmp = insert_ob_in_map (op, op->map, originator, 0);
180			if (tmp)
181			return 0;
182			else
183			return 1;
184	elmex	1.1	}
185
186			/*
187			* Return value: 1 if object was destroyed, 0 otherwise.
188			* Modified so that instead of passing the 'originator' that had no
189			* real use, instead we pass the 'user' of the teleporter. All the
190			* callers know what they wanted to teleporter (move_teleporter or
191			* shop map code)
192			* tele_type is the type of teleporter we want to match against -
193			* currently, this is either set to SHOP_MAT or TELEPORTER.
194			* It is basically used so that shop_mats and normal teleporters can
195			* be used close to each other and not have the player put to the
196			* one of another type.
197			*/
198	root	1.7	int
199			teleport (object teleporter, uint8 tele_type, object user)
200	elmex	1.1	{
201	root	1.7	object *altern;
202			int i, j, k, nrofalt = 0;
203			object other_teleporter, tmp;
204	root	1.9	maptile *m;
205	root	1.7	sint16 sx, sy;
206
207			if (user == NULL)
208			return 0;
209			if (user->head != NULL)
210			user = user->head;
211	elmex	1.1
212	root	1.7	/* Find all other teleporters within range. This range
213			* should really be setable by some object attribute instead of
214			* using hard coded values.
215			*/
216			for (i = -5; i < 6; i++)
217			for (j = -5; j < 6; j++)
218			{
219			if (i == 0 && j == 0)
220			continue;
221			/* Perhaps this should be extended to support tiled maps */
222			if (OUT_OF_REAL_MAP (teleporter->map, teleporter->x + i, teleporter->y + j))
223			continue;
224			other_teleporter = get_map_ob (teleporter->map, teleporter->x + i, teleporter->y + j);
225
226			while (other_teleporter)
227			{
228			if (other_teleporter->type == tele_type)
229			break;
230			other_teleporter = other_teleporter->above;
231			}
232			if (other_teleporter && !(RANDOM () % ++nrofalt))
233			altern = other_teleporter;
234			}
235	elmex	1.1
236	root	1.7	if (!nrofalt)
237			{
238			LOG (llevError, "No alternative teleporters around!\n");
239			return 0;
240	elmex	1.1	}
241
242	root	1.7	other_teleporter = altern;
243			k = find_free_spot (user, other_teleporter->map, other_teleporter->x, other_teleporter->y, 1, 9);
244
245			/* if k==-1, unable to find a free spot. If this is shop
246			* mat that the player is using, find someplace to move
247			* the player - otherwise, player can get trapped in the shops
248			* that appear in random dungeons. We basically just make
249			* sure the space isn't no pass (eg wall), and don't care
250			* about is alive.
251			*/
252			if (k == -1)
253			{
254			if (tele_type == SHOP_MAT && user->type == PLAYER)
255			{
256			for (k = 1; k < 9; k++)
257			{
258			if (get_map_flags (other_teleporter->map, &m,
259			other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k], &sx, &sy) & P_OUT_OF_MAP)
260			continue;
261	root	1.4
262	root	1.7	if (!OB_TYPE_MOVE_BLOCK (user, GET_MAP_MOVE_BLOCK (m, sx, sy)))
263			break;
264	root	1.4
265			}
266	root	1.7	if (k == 9)
267			{
268			LOG (llevError, "Shop mat %s (%d, %d) is in solid rock?\n",
269			&other_teleporter->name, other_teleporter->x, other_teleporter->y);
270			return 0;
271	root	1.4	}
272			}
273	root	1.7	else
274			return 0;
275	elmex	1.1	}
276
277	root	1.10	user->remove ();
278	elmex	1.1
279	root	1.7	/* Update location for the object */
280			for (tmp = user; tmp != NULL; tmp = tmp->more)
281			{
282			tmp->x = other_teleporter->x + freearr_x[k] + (tmp->arch == NULL ? 0 : tmp->arch->clone.x);
283			tmp->y = other_teleporter->y + freearr_y[k] + (tmp->arch == NULL ? 0 : tmp->arch->clone.y);
284	elmex	1.1	}
285	root	1.7	tmp = insert_ob_in_map (user, other_teleporter->map, NULL, 0);
286			return (tmp == NULL);
287	elmex	1.1	}
288
289	root	1.7	void
290			recursive_roll (object op, int dir, object pusher)
291			{
292			if (!roll_ob (op, dir, pusher))
293			{
294			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You fail to push the %s.", query_name (op));
295			return;
296			}
297			(void) move_ob (pusher, dir, pusher);
298			new_draw_info_format (NDI_BLACK, 0, pusher, "You move the %s.", query_name (op));
299	elmex	1.1	return;
300			}
301
302			/*
303			* This is a new version of blocked, this one handles objects
304			* that can be passed through by monsters with the CAN_PASS_THRU defined.
305			*
306			* very new version handles also multipart objects
307			* This is currently only used for the boulder roll code.
308			* Returns 1 if object does not fit, 0 if it does.
309			*/
310
311	root	1.7	int
312	root	1.9	try_fit (object op, maptile m, int x, int y)
313	elmex	1.1	{
314	root	1.7	object tmp, more;
315			sint16 tx, ty;
316			int mflags;
317	root	1.9	maptile *m2;
318	elmex	1.1
319	root	1.7	if (op->head)
320			op = op->head;
321	elmex	1.1
322	root	1.7	for (more = op; more; more = more->more)
323			{
324			tx = x + more->x - op->x;
325			ty = y + more->y - op->y;
326	elmex	1.1
327	root	1.7	mflags = get_map_flags (m, &m2, tx, ty, &tx, &ty);
328	elmex	1.1
329	root	1.7	if (mflags & P_OUT_OF_MAP)
330			return 1;
331	elmex	1.1
332	root	1.7	for (tmp = get_map_ob (m2, tx, ty); tmp; tmp = tmp->above)
333			{
334			if (tmp->head == op \|\| tmp == op)
335			continue;
336	elmex	1.1
337	root	1.7	if ((QUERY_FLAG (tmp, FLAG_ALIVE) && tmp->type != DOOR))
338			return 1;
339	elmex	1.1
340	root	1.7	if (OB_MOVE_BLOCK (op, tmp))
341			return 1;
342	elmex	1.1
343	root	1.4	}
344	elmex	1.1	}
345	root	1.7	return 0;
346	elmex	1.1	}
347
348			/*
349			* this is not perfect yet.
350			* it does not roll objects behind multipart objects properly.
351			* Support for rolling multipart objects is questionable.
352			*/
353
354	root	1.7	int
355			roll_ob (object op, int dir, object pusher)
356			{
357			object *tmp;
358			sint16 x, y;
359			int flags;
360	root	1.9	maptile *m;
361	root	1.7	MoveType move_block;
362
363			if (op->head)
364			op = op->head;
365
366			x = op->x + freearr_x[dir];
367			y = op->y + freearr_y[dir];
368
369			if (!QUERY_FLAG (op, FLAG_CAN_ROLL) \|\| (op->weight && random_roll (0, op->weight / 50000 - 1, pusher, PREFER_LOW) > pusher->stats.Str))
370			return 0;
371	elmex	1.1
372	root	1.7	m = op->map;
373			flags = get_map_flags (m, &m, x, y, &x, &y);
374	elmex	1.1
375	root	1.7	if (flags & (P_OUT_OF_MAP \| P_IS_ALIVE))
376			return 0;
377	elmex	1.1
378	root	1.7	move_block = GET_MAP_MOVE_BLOCK (m, x, y);
379	elmex	1.1
380	root	1.7	/* If the target space is not blocked, no need to look at the objects on it */
381			if ((op->move_type & move_block) == op->move_type)
382			{
383			for (tmp = get_map_ob (m, x, y); tmp != NULL; tmp = tmp->above)
384			{
385			if (tmp->head == op)
386	root	1.4	continue;
387	root	1.7	if (OB_MOVE_BLOCK (op, tmp) && !roll_ob (tmp, dir, pusher))
388	root	1.4	return 0;
389			}
390	elmex	1.1	}
391	root	1.7	if (try_fit (op, m, x, y))
392			return 0;
393	elmex	1.1
394	root	1.10	op->remove ();
395	root	1.7	for (tmp = op; tmp != NULL; tmp = tmp->more)
396			tmp->x += freearr_x[dir], tmp->y += freearr_y[dir];
397			insert_ob_in_map (op, op->map, pusher, 0);
398			return 1;
399	elmex	1.1	}
400
401			/* returns 1 if pushing invokes a attack, 0 when not */
402	root	1.7	int
403			push_ob (object who, int dir, object pusher)
404			{
405			int str1, str2;
406			object *owner;
407
408			if (who->head != NULL)
409			who = who->head;
410			owner = get_owner (who);
411
412			/* Wake up sleeping monsters that may be pushed */
413			CLEAR_FLAG (who, FLAG_SLEEP);
414
415			/* player change place with his pets or summoned creature */
416			/* TODO: allow multi arch pushing. Can't be very difficult */
417			if (who->more == NULL
418	elmex	1.1	#ifdef COZY_SERVER
419	root	1.7	&& ((owner && owner->contr && pusher->contr && same_party (owner->contr->party, pusher->contr->party)) \|\| owner == pusher)
420	elmex	1.1	#else
421	root	1.7	&& owner == pusher
422	elmex	1.1	#endif
423	root	1.7	)
424			{
425			int temp;
426	root	1.9	maptile *m;
427	root	1.7
428	root	1.10	who->remove ();
429			pusher->remove ();
430	root	1.7	temp = pusher->x;
431			pusher->x = who->x;
432			who->x = temp;
433
434			temp = pusher->y;
435			pusher->y = who->y;
436			who->y = temp;
437	root	1.4
438	root	1.7	m = pusher->map;
439			pusher->map = who->map;
440			who->map = m;
441
442			insert_ob_in_map (who, who->map, pusher, 0);
443			insert_ob_in_map (pusher, pusher->map, pusher, 0);
444			return 0;
445	elmex	1.1	}
446
447
448	root	1.7	/* We want ONLY become enemy of evil, unaggressive monster. We must RUN in them */
449			/* In original we have here a unaggressive check only - that was the reason why */
450			/* we so often become an enemy of friendly monsters... */
451			/* funny: was they set to unaggressive 0 (= not so nice) they don't attack */
452
453			if (owner != pusher && pusher->type == PLAYER && who->type != PLAYER &&
454			!QUERY_FLAG (who, FLAG_FRIENDLY) && !QUERY_FLAG (who, FLAG_NEUTRAL))
455			{
456			if (pusher->contr->run_on) /* only when we run */
457			{
458			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You start to attack %s !!", &who->name);
459			CLEAR_FLAG (who, FLAG_UNAGGRESSIVE); /* the sucker don't like you anymore */
460			who->enemy = pusher;
461			return 1;
462	root	1.4	}
463	root	1.7	else
464	root	1.4	{
465	root	1.7	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You avoid attacking %s.", &who->name);
466	root	1.4	}
467	elmex	1.1	}
468
469	root	1.7	/* now, lets test stand still. we NEVER can push stand_still monsters. */
470			if (QUERY_FLAG (who, FLAG_STAND_STILL))
471	elmex	1.1	{
472	root	1.7	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You can't push %s.", &who->name);
473			return 0;
474	elmex	1.1	}
475	root	1.7
476			/* This block is basically if you are pushing friendly but
477			* non pet creaturs.
478			* It basically does a random strength comparision to
479			* determine if you can push someone around. Note that
480			* this pushes the other person away - its not a swap.
481			*/
482
483			str1 = (who->stats.Str > 0 ? who->stats.Str : who->level);
484			str2 = (pusher->stats.Str > 0 ? pusher->stats.Str : pusher->level);
485			if (QUERY_FLAG (who, FLAG_WIZ) \|\|
486			random_roll (str1, str1 / 2 + str1 * 2, who, PREFER_HIGH) >=
487			random_roll (str2, str2 / 2 + str2 * 2, pusher, PREFER_HIGH) \|\| !move_object (who, dir))
488			{
489			if (who->type == PLAYER)
490			{
491			new_draw_info_format (NDI_UNIQUE, 0, who, "%s tried to push you.", &pusher->name);
492	root	1.4	}
493	root	1.7	return 0;
494	elmex	1.1	}
495
496	root	1.7	/* If we get here, the push succeeded.
497			* Let everyone know the status.
498			*/
499			if (who->type == PLAYER)
500			{
501			new_draw_info_format (NDI_UNIQUE, 0, who, "%s pushed you.", &pusher->name);
502	elmex	1.1	}
503	root	1.7	if (pusher->type == PLAYER)
504			{
505			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You pushed %s back.", &who->name);
506			}
507
508			return 1;
509	elmex	1.1	}