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

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 (mapwalk_buf, 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;
    }

  pusher->move (dir);
  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. H<You have to run if you wish to attack unnagressive NPCs.>", &who->name);
    }

  /* now, let's 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. H<You simply can't.>", &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) || !who->move (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:	1.37
Committed:	Fri Mar 26 00:53:26 2010 UTC (14 years, 2 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.36:	+2 -30 lines
Log Message:	move_ob/move_object => ->move
#	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	root	1.29	int
31			object::move (int dir, object *originator)
32			{
33			sint16 newx = x + freearr_x[dir];
34			sint16 newy = y + freearr_y[dir];
35	elmex	1.1
36	root	1.30	mapxy pos (this);
37			pos.move (dir);
38	root	1.7
39	root	1.30	/* If the space the object is moving to is out of the map,
40	root	1.7	* bail now - we know it can't work.
41			*/
42	root	1.30	if (!pos.normalise ())
43	root	1.7	return 0;
44	elmex	1.1
45	root	1.7	/* Is this space blocked? Players with wizpass are immune to
46			* this condition.
47			*/
48	root	1.30	if (blocked_link (this, pos.m, pos.x, pos.y) && !flag [FLAG_WIZPASS])
49	root	1.7	return 0;
50	elmex	1.1
51	root	1.30	// check tail movability
52			if (more && !more->move (dir, more->head))
53			return 0;
54
55			/* we need to set the direction for the new animation code.
56	root	1.7	* it uses it to figure out face to use - I can't see it
57			* breaking anything, but it might.
58			*/
59	root	1.29	direction = dir;
60	elmex	1.1
61	root	1.29	if (will_apply & 4)
62	root	1.30	check_earthwalls (this, pos.m, pos.x, pos.y);
63	root	1.12
64	root	1.29	if (will_apply & 8)
65	root	1.30	check_doors (this, pos.m, pos.x, pos.y);
66	elmex	1.1
67	root	1.7	/* If this is a tail portion, just want to tell caller that move is
68			* ok - the caller will deal with actual object removal/insertion
69			*/
70	root	1.29	if (head)
71	root	1.7	return 1;
72	elmex	1.1
73	root	1.30	if (pos.m != map && contr)
74	root	1.13	{
75	root	1.29	if (INVOKE_MAP (LEAVE, map, ARG_PLAYER (contr)))
76	root	1.13	return 0;
77
78	root	1.29	remove ();
79	root	1.13
80	root	1.30	if (INVOKE_PLAYER (MAP_CHANGE, contr, ARG_MAP (pos.m), ARG_INT (pos.x), ARG_INT (pos.y)))
81	root	1.13	return 0;
82
83	root	1.30	if (INVOKE_MAP (ENTER, pos.m, ARG_PLAYER (contr), ARG_INT (pos.x), ARG_INT (pos.y)))
84	root	1.13	return 0;
85			}
86	elmex	1.1
87	root	1.7	/* insert_ob_in_map will deal with any tiling issues */
88	root	1.30	pos.insert (this, originator);
89	elmex	1.1
90	root	1.7	return 1;
91	elmex	1.1	}
92
93			/*
94			* transfer_ob(): Move an object (even linked objects) to another spot
95			* on the same map.
96			*
97			* Does nothing if there is no free spot.
98			*
99			* randomly: If true, use find_free_spot() to find the destination, otherwise
100			* use find_first_free_spot().
101			*
102			* Return value: 1 if object was destroyed, 0 otherwise.
103			*/
104
105	root	1.7	int
106			transfer_ob (object op, int x, int y, int randomly, object originator)
107	elmex	1.1	{
108	root	1.7	int i;
109			object *tmp;
110
111			if (randomly)
112			i = find_free_spot (op, op->map, x, y, 0, SIZEOFFREE);
113			else
114			i = find_first_free_spot (op, op->map, x, y);
115
116			if (i == -1)
117			return 0; /* No free spot */
118
119	root	1.26	op = op->head_ ();
120	root	1.10	op->remove ();
121	elmex	1.1
122	root	1.26	for (object *tmp = op; tmp; tmp = tmp->more)
123			{
124	root	1.30	tmp->x = x + freearr_x[i] + tmp->arch->x;
125			tmp->y = y + freearr_y[i] + tmp->arch->y;
126	root	1.26	}
127
128			op = insert_ob_in_map (op, op->map, originator, 0);
129
130			return !op;
131	elmex	1.1	}
132
133			/*
134			* Return value: 1 if object was destroyed, 0 otherwise.
135			* Modified so that instead of passing the 'originator' that had no
136			* real use, instead we pass the 'user' of the teleporter. All the
137			* callers know what they wanted to teleporter (move_teleporter or
138			* shop map code)
139			* tele_type is the type of teleporter we want to match against -
140			* currently, this is either set to SHOP_MAT or TELEPORTER.
141			* It is basically used so that shop_mats and normal teleporters can
142			* be used close to each other and not have the player put to the
143			* one of another type.
144			*/
145	root	1.7	int
146			teleport (object teleporter, uint8 tele_type, object user)
147	elmex	1.1	{
148	root	1.30	if (!user)
149			return 0;
150
151			object *other_teleporter = 0;
152			int nrofalt = 0;
153	root	1.7
154	root	1.30	user = user->head_ ();
155	elmex	1.1
156	root	1.7	/* Find all other teleporters within range. This range
157			* should really be setable by some object attribute instead of
158			* using hard coded values.
159			*/
160	root	1.36	unordered_mapwalk (mapwalk_buf, teleporter, -5, -5, 5, 5)
161	root	1.30	{
162			mapspace &ms = m->at (nx, ny);
163	root	1.28
164	root	1.30	for (object *tmp = ms.top; tmp; tmp = tmp->below)
165			if (tmp->type == tele_type)
166			{
167			if ((dx \|\| dy) && !rndm (++nrofalt))
168			other_teleporter = tmp;
169	root	1.7
170	root	1.30	break;
171	root	1.7	}
172			}
173	elmex	1.1
174	root	1.7	if (!nrofalt)
175			{
176	root	1.23	LOG (llevError, "%s: no alternative teleporters around (user %s).\n",
177			teleporter->debug_desc (), user->debug_desc ());
178	root	1.7	return 0;
179	elmex	1.1	}
180
181	root	1.30	int k = find_free_spot (user, other_teleporter->map, other_teleporter->x, other_teleporter->y, 1, 9);
182	root	1.7
183			/* if k==-1, unable to find a free spot. If this is shop
184			* mat that the player is using, find someplace to move
185			* the player - otherwise, player can get trapped in the shops
186			* that appear in random dungeons. We basically just make
187			* sure the space isn't no pass (eg wall), and don't care
188			* about is alive.
189			*/
190			if (k == -1)
191			{
192	root	1.30	if (tele_type == SHOP_MAT && user->is_player ())
193	root	1.7	{
194			for (k = 1; k < 9; k++)
195			{
196	root	1.30	maptile *m;
197			sint16 sx, sy;
198
199	root	1.7	if (get_map_flags (other_teleporter->map, &m,
200			other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k], &sx, &sy) & P_OUT_OF_MAP)
201			continue;
202	root	1.4
203	root	1.7	if (!OB_TYPE_MOVE_BLOCK (user, GET_MAP_MOVE_BLOCK (m, sx, sy)))
204			break;
205	root	1.30	}
206	root	1.4
207	root	1.7	if (k == 9)
208			{
209			LOG (llevError, "Shop mat %s (%d, %d) is in solid rock?\n",
210			&other_teleporter->name, other_teleporter->x, other_teleporter->y);
211			return 0;
212	root	1.4	}
213			}
214	root	1.7	else
215			return 0;
216	elmex	1.1	}
217
218	root	1.30	return !other_teleporter->map->insert (
219			user, other_teleporter->x + freearr_x[k], other_teleporter->y + freearr_y[k]
220			);
221	elmex	1.1	}
222
223			/*
224			* This is a new version of blocked, this one handles objects
225			* that can be passed through by monsters with the CAN_PASS_THRU defined.
226			*
227			* very new version handles also multipart objects
228			* This is currently only used for the boulder roll code.
229			* Returns 1 if object does not fit, 0 if it does.
230			*/
231	root	1.33	static int
232	root	1.9	try_fit (object op, maptile m, int x, int y)
233	elmex	1.1	{
234	root	1.7	object tmp, more;
235			sint16 tx, ty;
236			int mflags;
237	root	1.9	maptile *m2;
238	elmex	1.1
239	root	1.7	if (op->head)
240			op = op->head;
241	elmex	1.1
242	root	1.7	for (more = op; more; more = more->more)
243			{
244			tx = x + more->x - op->x;
245			ty = y + more->y - op->y;
246	elmex	1.1
247	root	1.7	mflags = get_map_flags (m, &m2, tx, ty, &tx, &ty);
248	elmex	1.1
249	root	1.7	if (mflags & P_OUT_OF_MAP)
250			return 1;
251	elmex	1.1
252	root	1.12	for (tmp = GET_MAP_OB (m2, tx, ty); tmp; tmp = tmp->above)
253	root	1.7	{
254			if (tmp->head == op \|\| tmp == op)
255			continue;
256	elmex	1.1
257	root	1.7	if ((QUERY_FLAG (tmp, FLAG_ALIVE) && tmp->type != DOOR))
258			return 1;
259	elmex	1.1
260	root	1.7	if (OB_MOVE_BLOCK (op, tmp))
261			return 1;
262	elmex	1.1
263	root	1.4	}
264	elmex	1.1	}
265	root	1.7	return 0;
266	elmex	1.1	}
267
268			/*
269			* this is not perfect yet.
270			* it does not roll objects behind multipart objects properly.
271			* Support for rolling multipart objects is questionable.
272			*/
273	root	1.33	static int
274	root	1.7	roll_ob (object op, int dir, object pusher)
275			{
276			sint16 x, y;
277			int flags;
278	root	1.9	maptile *m;
279	root	1.7	MoveType move_block;
280
281			if (op->head)
282			op = op->head;
283
284			x = op->x + freearr_x[dir];
285			y = op->y + freearr_y[dir];
286
287	root	1.25	if (!QUERY_FLAG (op, FLAG_CAN_ROLL)
288			\|\| (op->weight && random_roll (0, op->weight / 50000 - 1, pusher, PREFER_LOW)
289			> pusher->stats.Str))
290	root	1.7	return 0;
291	elmex	1.1
292	root	1.7	m = op->map;
293			flags = get_map_flags (m, &m, x, y, &x, &y);
294	elmex	1.1
295	root	1.7	if (flags & (P_OUT_OF_MAP \| P_IS_ALIVE))
296			return 0;
297	elmex	1.1
298	root	1.7	move_block = GET_MAP_MOVE_BLOCK (m, x, y);
299	elmex	1.1
300	root	1.7	/* If the target space is not blocked, no need to look at the objects on it */
301			if ((op->move_type & move_block) == op->move_type)
302			{
303	root	1.30	for (object *tmp = GET_MAP_OB (m, x, y); tmp; tmp = tmp->above)
304	root	1.7	{
305			if (tmp->head == op)
306	root	1.4	continue;
307	root	1.30
308	root	1.7	if (OB_MOVE_BLOCK (op, tmp) && !roll_ob (tmp, dir, pusher))
309	root	1.4	return 0;
310			}
311	elmex	1.1	}
312	root	1.30
313	root	1.7	if (try_fit (op, m, x, y))
314			return 0;
315	elmex	1.1
316	root	1.30	op->move (dir);
317
318	root	1.7	return 1;
319	elmex	1.1	}
320
321	root	1.33	void
322			recursive_roll (object op, int dir, object pusher)
323			{
324			if (!roll_ob (op, dir, pusher))
325			{
326			new_draw_info_format (NDI_UNIQUE, 0, pusher, "You fail to push the %s.", query_name (op));
327			return;
328			}
329
330	root	1.37	pusher->move (dir);
331	root	1.33	new_draw_info_format (NDI_BLACK, 0, pusher, "You move the %s.", query_name (op));
332			return;
333			}
334
335	elmex	1.1	/* returns 1 if pushing invokes a attack, 0 when not */
336	root	1.7	int
337			push_ob (object who, int dir, object pusher)
338			{
339			int str1, str2;
340			object *owner;
341
342			if (who->head != NULL)
343			who = who->head;
344	root	1.11	owner = who->owner;
345	root	1.7
346			/* Wake up sleeping monsters that may be pushed */
347			CLEAR_FLAG (who, FLAG_SLEEP);
348
349			/* player change place with his pets or summoned creature */
350			/* TODO: allow multi arch pushing. Can't be very difficult */
351			if (who->more == NULL
352	root	1.18	&& ((owner && owner->contr && pusher->contr && same_party (owner->contr->party, pusher->contr->party))
353			\|\| owner == pusher)
354	root	1.7	)
355			{
356			int temp;
357	root	1.9	maptile *m;
358	root	1.7
359	root	1.10	who->remove ();
360			pusher->remove ();
361	root	1.7	temp = pusher->x;
362			pusher->x = who->x;
363			who->x = temp;
364
365			temp = pusher->y;
366			pusher->y = who->y;
367			who->y = temp;
368	root	1.4
369	root	1.7	m = pusher->map;
370			pusher->map = who->map;
371			who->map = m;
372
373			insert_ob_in_map (who, who->map, pusher, 0);
374			insert_ob_in_map (pusher, pusher->map, pusher, 0);
375	root	1.30
376	root	1.7	return 0;
377	elmex	1.1	}
378
379	root	1.7	/* We want ONLY become enemy of evil, unaggressive monster. We must RUN in them */
380			/* In original we have here a unaggressive check only - that was the reason why */
381			/* we so often become an enemy of friendly monsters... */
382			/* funny: was they set to unaggressive 0 (= not so nice) they don't attack */
383			if (owner != pusher && pusher->type == PLAYER && who->type != PLAYER &&
384			!QUERY_FLAG (who, FLAG_FRIENDLY) && !QUERY_FLAG (who, FLAG_NEUTRAL))
385			{
386			if (pusher->contr->run_on) /* only when we run */
387			{
388	root	1.16	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You start to attack %s!!", &who->name);
389	root	1.7	CLEAR_FLAG (who, FLAG_UNAGGRESSIVE); /* the sucker don't like you anymore */
390			who->enemy = pusher;
391			return 1;
392	root	1.4	}
393	root	1.7	else
394	root	1.34	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You avoid attacking %s. H<You have to run if you wish to attack unnagressive NPCs.>", &who->name);
395	elmex	1.1	}
396
397	root	1.34	/* now, let's test stand still. we NEVER can push stand_still monsters. */
398	root	1.7	if (QUERY_FLAG (who, FLAG_STAND_STILL))
399	elmex	1.1	{
400	root	1.34	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You can't push %s. H<You simply can't.>", &who->name);
401	root	1.7	return 0;
402	elmex	1.1	}
403	root	1.7
404			/* This block is basically if you are pushing friendly but
405			* non pet creaturs.
406			* It basically does a random strength comparision to
407			* determine if you can push someone around. Note that
408			* this pushes the other person away - its not a swap.
409			*/
410
411			str1 = (who->stats.Str > 0 ? who->stats.Str : who->level);
412			str2 = (pusher->stats.Str > 0 ? pusher->stats.Str : pusher->level);
413			if (QUERY_FLAG (who, FLAG_WIZ) \|\|
414	root	1.17	random_roll (str1, str1 * 5 / 2, who, PREFER_HIGH) >=
415	root	1.37	random_roll (str2, str2 * 5 / 2, pusher, PREFER_HIGH) \|\| !who->move (dir))
416	root	1.7	{
417			if (who->type == PLAYER)
418	root	1.17	new_draw_info_format (NDI_UNIQUE, 0, who, "%s tried to push you.", &pusher->name);
419
420	root	1.7	return 0;
421	elmex	1.1	}
422
423	root	1.7	/* If we get here, the push succeeded.
424			* Let everyone know the status.
425			*/
426			if (who->type == PLAYER)
427	root	1.35	new_draw_info_format (NDI_UNIQUE, 0, who, "%s pushed you.", &pusher->name);
428
429	root	1.7	if (pusher->type == PLAYER)
430	root	1.35	new_draw_info_format (NDI_UNIQUE, 0, pusher, "You pushed %s back.", &who->name);
431	root	1.7
432			return 1;
433	elmex	1.1	}