server/server/move.C

/*
 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
 * 
 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
 * Copyright (©) 1992,2007 Frank Tore Johansen
 * 
 * Deliantra is free software: you can redistribute it and/or modify it under
 * the terms of the Affero GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the Affero GNU General Public License
 * and the GNU General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 * 
 * The authors can be reached via e-mail to <support@deliantra.net>
 */

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

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

/* 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)
{
  return op->move (dir, originator);
}

int
object::move (int dir, object *originator)
{
  sint16 newx = x + freearr_x[dir];
  sint16 newy = y + freearr_y[dir];

  mapxy pos (this);
  pos.move (dir);

  /* If the space the object is moving to is out of the map,
   * bail now - we know it can't work.
   */
  if (!pos.normalise ())
    return 0;

  /* Is this space blocked?  Players with wizpass are immune to
   * this condition.
   */
  if (blocked_link (this, pos.m, pos.x, pos.y) && !flag [FLAG_WIZPASS])
    return 0;

  // check tail movability
  if (more && !more->move (dir, more->head))
    return 0;

  /* 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.
   */
  direction = dir;

  if (will_apply & 4)
    check_earthwalls (this, pos.m, pos.x, pos.y);

  if (will_apply & 8)
    check_doors (this, pos.m, pos.x, pos.y);

  /* 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 (head)
    return 1;

  if (pos.m != map && contr)
    {
      if (INVOKE_MAP (LEAVE, map, ARG_PLAYER (contr)))
        return 0;

      remove ();

      if (INVOKE_PLAYER (MAP_CHANGE, contr, ARG_MAP (pos.m), ARG_INT (pos.x), ARG_INT (pos.y)))
        return 0;

      if (INVOKE_MAP (ENTER, pos.m, ARG_PLAYER (contr), ARG_INT (pos.x), ARG_INT (pos.y)))
        return 0;
    }

  /* insert_ob_in_map will deal with any tiling issues */
  pos.insert (this, originator);

  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 */

  op = op->head_ ();
  op->remove ();

  for (object *tmp = op; tmp; tmp = tmp->more)
    {
      tmp->x = x + freearr_x[i] + tmp->arch->x;
      tmp->y = y + freearr_y[i] + tmp->arch->y;
    }

  op = insert_ob_in_map (op, op->map, originator, 0);

  return !op;
}

/*
 * 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)
{
  if (!user)
    return 0;

  object *other_teleporter = 0;
  int nrofalt = 0;

  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.
   */
  unordered_mapwalk (teleporter, -5, -5, 5, 5)
    {
      mapspace &ms = m->at (nx, ny);

      for (object *tmp = ms.top; tmp; tmp = tmp->below)
        if (tmp->type == tele_type)
          {
            if ((dx || dy) && !rndm (++nrofalt))
              other_teleporter = tmp;

            break;
          }
      }

  if (!nrofalt)
    {
      LOG (llevError, "%s: no alternative teleporters around (user %s).\n",
           teleporter->debug_desc (), user->debug_desc ());
      return 0;
    }

  int 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->is_player ())
        {
          for (k = 1; k < 9; k++)
            {
              maptile *m;
              sint16 sx, sy;

              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;
    }

  return !other_teleporter->map->insert (
            user, other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k]
         );
}

/*
 * 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.
 */
static 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.
 */
static int
roll_ob (object *op, int dir, object *pusher)
{
  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 (object *tmp = GET_MAP_OB (m, x, y); tmp; 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->move (dir);

  return 1;
}

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;
    }

  move_ob (pusher, dir, pusher);
  new_draw_info_format (NDI_BLACK, 0, pusher, "You move the %s.", query_name (op));
  return;
}

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

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

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

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

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

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

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

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

      return 0;
    }

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

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

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

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

      return 0;
    }

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

  return 1;
}
Revision:	1.33
Committed:	Fri Nov 6 12:27:06 2009 UTC (14 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_90
Changes since 1.32:	+16 -17 lines
Log Message:	remove all protos from include/*proto.h for functions that are effectively static
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.22	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	pippijn	1.15	*
4	root	1.24	* Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	root	1.19	* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6			* Copyright (©) 1992,2007 Frank Tore Johansen
7	pippijn	1.15	*
8	root	1.32	* Deliantra is free software: you can redistribute it and/or modify it under
9			* the terms of the Affero GNU General Public License as published by the
10			* Free Software Foundation, either version 3 of the License, or (at your
11			* option) any later version.
12	pippijn	1.15	*
13	root	1.21	* This program is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			* GNU General Public License for more details.
17	pippijn	1.15	*
18	root	1.32	* You should have received a copy of the Affero GNU General Public License
19			* and the GNU General Public License along with this program. If not, see
20			* <http://www.gnu.org/licenses/>.
21	root	1.19	*
22	root	1.22	* The authors can be reached via e-mail to <support@deliantra.net>
23	pippijn	1.15	*/
24	elmex	1.1
25			#include <global.h>
26			#ifndef __CEXTRACT__
27	root	1.7	# include <sproto.h>
28	elmex	1.1	#endif
29
30			/*
31			* move_object() tries to move object op in the direction "dir".
32			* If it fails (something blocks the passage), it returns 0,
33			* otherwise 1.
34			* This is an improvement from the previous move_ob(), which
35			* removed and inserted objects even if they were unable to move.
36			*/
37	root	1.7	int
38			move_object (object *op, int dir)
39			{
40	root	1.29	return op->move (dir);
41	elmex	1.1	}
42
43			/* object op is trying to move in direction dir.
44			* originator is typically the same as op, but
45			* can be different if originator is causing op to
46			* move (originator is pushing op)
47			* returns 0 if the object is not able to move to the
48			* desired space, 1 otherwise (in which case we also
49			* move the object accordingly. This function is
50			* very similiar to move_object.
51			*/
52	root	1.7	int
53			move_ob (object op, int dir, object originator)
54	elmex	1.1	{
55	root	1.29	return op->move (dir, originator);
56			}
57
58			int
59			object::move (int dir, object *originator)
60			{
61			sint16 newx = x + freearr_x[dir];
62			sint16 newy = y + freearr_y[dir];
63	elmex	1.1
64	root	1.30	mapxy pos (this);
65			pos.move (dir);
66	root	1.7
67	root	1.30	/* If the space the object is moving to is out of the map,
68	root	1.7	* bail now - we know it can't work.
69			*/
70	root	1.30	if (!pos.normalise ())
71	root	1.7	return 0;
72	elmex	1.1
73	root	1.7	/* Is this space blocked? Players with wizpass are immune to
74			* this condition.
75			*/
76	root	1.30	if (blocked_link (this, pos.m, pos.x, pos.y) && !flag [FLAG_WIZPASS])
77	root	1.7	return 0;
78	elmex	1.1
79	root	1.30	// check tail movability
80			if (more && !more->move (dir, more->head))
81			return 0;
82
83			/* we need to set the direction for the new animation code.
84	root	1.7	* it uses it to figure out face to use - I can't see it
85			* breaking anything, but it might.
86			*/
87	root	1.29	direction = dir;
88	elmex	1.1
89	root	1.29	if (will_apply & 4)
90	root	1.30	check_earthwalls (this, pos.m, pos.x, pos.y);
91	root	1.12
92	root	1.29	if (will_apply & 8)
93	root	1.30	check_doors (this, pos.m, pos.x, pos.y);
94	elmex	1.1
95	root	1.7	/* If this is a tail portion, just want to tell caller that move is
96			* ok - the caller will deal with actual object removal/insertion
97			*/
98	root	1.29	if (head)
99	root	1.7	return 1;
100	elmex	1.1
101	root	1.30	if (pos.m != map && contr)
102	root	1.13	{
103	root	1.29	if (INVOKE_MAP (LEAVE, map, ARG_PLAYER (contr)))
104	root	1.13	return 0;
105
106	root	1.29	remove ();
107	root	1.13
108	root	1.30	if (INVOKE_PLAYER (MAP_CHANGE, contr, ARG_MAP (pos.m), ARG_INT (pos.x), ARG_INT (pos.y)))
109	root	1.13	return 0;
110
111	root	1.30	if (INVOKE_MAP (ENTER, pos.m, ARG_PLAYER (contr), ARG_INT (pos.x), ARG_INT (pos.y)))
112	root	1.13	return 0;
113			}
114	elmex	1.1
115	root	1.7	/* insert_ob_in_map will deal with any tiling issues */
116	root	1.30	pos.insert (this, originator);
117	elmex	1.1
118	root	1.7	return 1;
119	elmex	1.1	}
120
121			/*
122			* transfer_ob(): Move an object (even linked objects) to another spot
123			* on the same map.
124			*
125			* Does nothing if there is no free spot.
126			*
127			* randomly: If true, use find_free_spot() to find the destination, otherwise
128			* use find_first_free_spot().
129			*
130			* Return value: 1 if object was destroyed, 0 otherwise.
131			*/
132
133	root	1.7	int
134			transfer_ob (object op, int x, int y, int randomly, object originator)
135	elmex	1.1	{
136	root	1.7	int i;
137			object *tmp;
138
139			if (randomly)
140			i = find_free_spot (op, op->map, x, y, 0, SIZEOFFREE);
141			else
142			i = find_first_free_spot (op, op->map, x, y);
143
144			if (i == -1)
145			return 0; /* No free spot */
146
147	root	1.26	op = op->head_ ();
148	root	1.10	op->remove ();
149	elmex	1.1
150	root	1.26	for (object *tmp = op; tmp; tmp = tmp->more)
151			{
152	root	1.30	tmp->x = x + freearr_x[i] + tmp->arch->x;
153			tmp->y = y + freearr_y[i] + tmp->arch->y;
154	root	1.26	}
155
156			op = insert_ob_in_map (op, op->map, originator, 0);
157
158			return !op;
159	elmex	1.1	}
160
161			/*
162			* Return value: 1 if object was destroyed, 0 otherwise.
163			* Modified so that instead of passing the 'originator' that had no
164			* real use, instead we pass the 'user' of the teleporter. All the
165			* callers know what they wanted to teleporter (move_teleporter or
166			* shop map code)
167			* tele_type is the type of teleporter we want to match against -
168			* currently, this is either set to SHOP_MAT or TELEPORTER.
169			* It is basically used so that shop_mats and normal teleporters can
170			* be used close to each other and not have the player put to the
171			* one of another type.
172			*/
173	root	1.7	int
174			teleport (object teleporter, uint8 tele_type, object user)
175	elmex	1.1	{
176	root	1.30	if (!user)
177			return 0;
178
179			object *other_teleporter = 0;
180			int nrofalt = 0;
181	root	1.7
182	root	1.30	user = user->head_ ();
183	elmex	1.1
184	root	1.7	/* Find all other teleporters within range. This range
185			* should really be setable by some object attribute instead of
186			* using hard coded values.
187			*/
188	root	1.30	unordered_mapwalk (teleporter, -5, -5, 5, 5)
189			{
190			mapspace &ms = m->at (nx, ny);
191	root	1.28
192	root	1.30	for (object *tmp = ms.top; tmp; tmp = tmp->below)
193			if (tmp->type == tele_type)
194			{
195			if ((dx \|\| dy) && !rndm (++nrofalt))
196			other_teleporter = tmp;
197	root	1.7
198	root	1.30	break;
199	root	1.7	}
200			}
201	elmex	1.1
202	root	1.7	if (!nrofalt)
203			{
204	root	1.23	LOG (llevError, "%s: no alternative teleporters around (user %s).\n",
205			teleporter->debug_desc (), user->debug_desc ());
206	root	1.7	return 0;
207	elmex	1.1	}
208
209	root	1.30	int k = find_free_spot (user, other_teleporter->map, other_teleporter->x, other_teleporter->y, 1, 9);
210	root	1.7
211			/* if k==-1, unable to find a free spot. If this is shop
212			* mat that the player is using, find someplace to move
213			* the player - otherwise, player can get trapped in the shops
214			* that appear in random dungeons. We basically just make
215			* sure the space isn't no pass (eg wall), and don't care
216			* about is alive.
217			*/
218			if (k == -1)
219			{
220	root	1.30	if (tele_type == SHOP_MAT && user->is_player ())
221	root	1.7	{
222			for (k = 1; k < 9; k++)
223			{
224	root	1.30	maptile *m;
225			sint16 sx, sy;
226
227	root	1.7	if (get_map_flags (other_teleporter->map, &m,
228			other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k], &sx, &sy) & P_OUT_OF_MAP)
229			continue;
230	root	1.4
231	root	1.7	if (!OB_TYPE_MOVE_BLOCK (user, GET_MAP_MOVE_BLOCK (m, sx, sy)))
232			break;
233	root	1.30	}
234	root	1.4
235	root	1.7	if (k == 9)
236			{
237			LOG (llevError, "Shop mat %s (%d, %d) is in solid rock?\n",
238			&other_teleporter->name, other_teleporter->x, other_teleporter->y);
239			return 0;
240	root	1.4	}
241			}
242	root	1.7	else
243			return 0;
244	elmex	1.1	}
245
246	root	1.30	return !other_teleporter->map->insert (
247			user, other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k]
248			);
249	elmex	1.1	}
250
251			/*
252			* This is a new version of blocked, this one handles objects
253			* that can be passed through by monsters with the CAN_PASS_THRU defined.
254			*
255			* very new version handles also multipart objects
256			* This is currently only used for the boulder roll code.
257			* Returns 1 if object does not fit, 0 if it does.
258			*/
259	root	1.33	static int
260	root	1.9	try_fit (object op, maptile m, int x, int y)
261	elmex	1.1	{
262	root	1.7	object tmp, more;
263			sint16 tx, ty;
264			int mflags;
265	root	1.9	maptile *m2;
266	elmex	1.1
267	root	1.7	if (op->head)
268			op = op->head;
269	elmex	1.1
270	root	1.7	for (more = op; more; more = more->more)
271			{
272			tx = x + more->x - op->x;
273			ty = y + more->y - op->y;
274	elmex	1.1
275	root	1.7	mflags = get_map_flags (m, &m2, tx, ty, &tx, &ty);
276	elmex	1.1
277	root	1.7	if (mflags & P_OUT_OF_MAP)
278			return 1;
279	elmex	1.1
280	root	1.12	for (tmp = GET_MAP_OB (m2, tx, ty); tmp; tmp = tmp->above)
281	root	1.7	{
282			if (tmp->head == op \|\| tmp == op)
283			continue;
284	elmex	1.1
285	root	1.7	if ((QUERY_FLAG (tmp, FLAG_ALIVE) && tmp->type != DOOR))
286			return 1;
287	elmex	1.1
288	root	1.7	if (OB_MOVE_BLOCK (op, tmp))
289			return 1;
290	elmex	1.1
291	root	1.4	}
292	elmex	1.1	}
293	root	1.7	return 0;
294	elmex	1.1	}
295
296			/*
297			* this is not perfect yet.
298			* it does not roll objects behind multipart objects properly.
299			* Support for rolling multipart objects is questionable.
300			*/
301	root	1.33	static int
302	root	1.7	roll_ob (object op, int dir, object pusher)
303			{
304			sint16 x, y;
305			int flags;
306	root	1.9	maptile *m;
307	root	1.7	MoveType move_block;
308
309			if (op->head)
310			op = op->head;
311
312			x = op->x + freearr_x[dir];
313			y = op->y + freearr_y[dir];
314
315	root	1.25	if (!QUERY_FLAG (op, FLAG_CAN_ROLL)
316			\|\| (op->weight && random_roll (0, op->weight / 50000 - 1, pusher, PREFER_LOW)
317			> pusher->stats.Str))
318	root	1.7	return 0;
319	elmex	1.1
320	root	1.7	m = op->map;
321			flags = get_map_flags (m, &m, x, y, &x, &y);
322	elmex	1.1
323	root	1.7	if (flags & (P_OUT_OF_MAP \| P_IS_ALIVE))
324			return 0;
325	elmex	1.1
326	root	1.7	move_block = GET_MAP_MOVE_BLOCK (m, x, y);
327	elmex	1.1
328	root	1.7	/* If the target space is not blocked, no need to look at the objects on it */
329			if ((op->move_type & move_block) == op->move_type)
330			{
331	root	1.30	for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
332	root	1.7	{
333			if (tmp->head == op)
334	root	1.4	continue;
335	root	1.30
336	root	1.7	if (OB_MOVE_BLOCK (op, tmp) && !roll_ob (tmp, dir, pusher))
337	root	1.4	return 0;
338			}
339	elmex	1.1	}
340	root	1.30
341	root	1.7	if (try_fit (op, m, x, y))
342			return 0;
343	elmex	1.1
344	root	1.30	op->move (dir);
345
346	root	1.7	return 1;
347	elmex	1.1	}
348
349	root	1.33	void
350			recursive_roll (object op, int dir, object pusher)
351			{
352			if (!roll_ob (op, dir, pusher))
353			{
354			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You fail to push the %s.", query_name (op));
355			return;
356			}
357
358			move_ob (pusher, dir, pusher);
359			new_draw_info_format (NDI_BLACK, 0, pusher, "You move the %s.", query_name (op));
360			return;
361			}
362
363	elmex	1.1	/* returns 1 if pushing invokes a attack, 0 when not */
364	root	1.7	int
365			push_ob (object who, int dir, object pusher)
366			{
367			int str1, str2;
368			object *owner;
369
370			if (who->head != NULL)
371			who = who->head;
372	root	1.11	owner = who->owner;
373	root	1.7
374			/* Wake up sleeping monsters that may be pushed */
375			CLEAR_FLAG (who, FLAG_SLEEP);
376
377			/* player change place with his pets or summoned creature */
378			/* TODO: allow multi arch pushing. Can't be very difficult */
379			if (who->more == NULL
380	root	1.18	&& ((owner && owner->contr && pusher->contr && same_party (owner->contr->party, pusher->contr->party))
381			\|\| owner == pusher)
382	root	1.7	)
383			{
384			int temp;
385	root	1.9	maptile *m;
386	root	1.7
387	root	1.10	who->remove ();
388			pusher->remove ();
389	root	1.7	temp = pusher->x;
390			pusher->x = who->x;
391			who->x = temp;
392
393			temp = pusher->y;
394			pusher->y = who->y;
395			who->y = temp;
396	root	1.4
397	root	1.7	m = pusher->map;
398			pusher->map = who->map;
399			who->map = m;
400
401			insert_ob_in_map (who, who->map, pusher, 0);
402			insert_ob_in_map (pusher, pusher->map, pusher, 0);
403	root	1.30
404	root	1.7	return 0;
405	elmex	1.1	}
406
407	root	1.7	/* We want ONLY become enemy of evil, unaggressive monster. We must RUN in them */
408			/* In original we have here a unaggressive check only - that was the reason why */
409			/* we so often become an enemy of friendly monsters... */
410			/* funny: was they set to unaggressive 0 (= not so nice) they don't attack */
411			if (owner != pusher && pusher->type == PLAYER && who->type != PLAYER &&
412			!QUERY_FLAG (who, FLAG_FRIENDLY) && !QUERY_FLAG (who, FLAG_NEUTRAL))
413			{
414			if (pusher->contr->run_on) /* only when we run */
415			{
416	root	1.16	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You start to attack %s!!", &who->name);
417	root	1.7	CLEAR_FLAG (who, FLAG_UNAGGRESSIVE); /* the sucker don't like you anymore */
418			who->enemy = pusher;
419			return 1;
420	root	1.4	}
421	root	1.7	else
422	root	1.16	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You avoid attacking %s.", &who->name);
423	elmex	1.1	}
424
425	root	1.7	/* now, lets test stand still. we NEVER can push stand_still monsters. */
426			if (QUERY_FLAG (who, FLAG_STAND_STILL))
427	elmex	1.1	{
428	root	1.7	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You can't push %s.", &who->name);
429			return 0;
430	elmex	1.1	}
431	root	1.7
432			/* This block is basically if you are pushing friendly but
433			* non pet creaturs.
434			* It basically does a random strength comparision to
435			* determine if you can push someone around. Note that
436			* this pushes the other person away - its not a swap.
437			*/
438
439			str1 = (who->stats.Str > 0 ? who->stats.Str : who->level);
440			str2 = (pusher->stats.Str > 0 ? pusher->stats.Str : pusher->level);
441			if (QUERY_FLAG (who, FLAG_WIZ) \|\|
442	root	1.17	random_roll (str1, str1 * 5 / 2, who, PREFER_HIGH) >=
443			random_roll (str2, str2 * 5 / 2, pusher, PREFER_HIGH) \|\| !move_object (who, dir))
444	root	1.7	{
445			if (who->type == PLAYER)
446	root	1.17	new_draw_info_format (NDI_UNIQUE, 0, who, "%s tried to push you.", &pusher->name);
447
448	root	1.7	return 0;
449	elmex	1.1	}
450
451	root	1.7	/* If we get here, the push succeeded.
452			* Let everyone know the status.
453			*/
454			if (who->type == PLAYER)
455			{
456			new_draw_info_format (NDI_UNIQUE, 0, who, "%s pushed you.", &pusher->name);
457	elmex	1.1	}
458	root	1.7	if (pusher->type == PLAYER)
459			{
460			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You pushed %s back.", &who->name);
461			}
462
463			return 1;
464	elmex	1.1	}