server/server/move.C

/*
 * static char *rcsid_move_c =
 *    "$Id: move.C,v 1.3 2006-08-29 07:34:00 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;   /* this shouldn't be reached */
}


/*
 * 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:	1.4
Committed:	Tue Aug 29 08:01:37 2006 UTC (17 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+124 -124 lines
Log Message:	expand initial tabs to spaces
#	User	Rev	Content
1	elmex	1.1	/*
2			* static char *rcsid_move_c =
3	root	1.4	* "$Id: move.C,v 1.3 2006-08-29 07:34:00 root Exp $";
4	elmex	1.1	*/
5
6			/*
7			CrossFire, A Multiplayer game for X-windows
8
9			Copyright (C) 2002 Mark Wedel & Crossfire Development Team
10			Copyright (C) 1992 Frank Tore Johansen
11
12			This program is free software; you can redistribute it and/or modify
13			it under the terms of the GNU General Public License as published by
14			the Free Software Foundation; either version 2 of the License, or
15			(at your option) any later version.
16
17			This program is distributed in the hope that it will be useful,
18			but WITHOUT ANY WARRANTY; without even the implied warranty of
19			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20			GNU General Public License for more details.
21
22			You should have received a copy of the GNU General Public License
23			along with this program; if not, write to the Free Software
24			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25
26			The author can be reached via e-mail to crossfire-devel@real-time.com
27			*/
28
29			#include <global.h>
30			#ifndef __CEXTRACT__
31			#include <sproto.h>
32			#endif
33
34			#ifdef COZY_SERVER
35			// use a ptotoype
36			extern int same_party (partylist a, partylist b);
37			#endif
38
39			/*
40			* move_object() tries to move object op in the direction "dir".
41			* If it fails (something blocks the passage), it returns 0,
42			* otherwise 1.
43			* This is an improvement from the previous move_ob(), which
44			* removed and inserted objects even if they were unable to move.
45			*/
46
47			int move_object(object *op, int dir) {
48			return move_ob(op, dir, op);
49			}
50
51
52			/* object op is trying to move in direction dir.
53			* originator is typically the same as op, but
54			* can be different if originator is causing op to
55			* move (originator is pushing op)
56			* returns 0 if the object is not able to move to the
57			* desired space, 1 otherwise (in which case we also
58			* move the object accordingly. This function is
59			* very similiar to move_object.
60			*/
61			int move_ob (object op, int dir, object originator)
62			{
63			sint16 newx = op->x+freearr_x[dir];
64			sint16 newy = op->y+freearr_y[dir];
65			object *tmp;
66			mapstruct *m;
67			int mflags;
68
69			if(op==NULL) {
70	root	1.4	LOG(llevError,"Trying to move NULL.\n");
71			return 0;
72	elmex	1.1	}
73
74			m = op->map;
75			mflags = get_map_flags(m, &m, newx, newy, &newx, &newy);
76
77			/* If the space the player is trying to is out of the map,
78			* bail now - we know it can't work.
79			*/
80			if (mflags & P_OUT_OF_MAP) return 0;
81
82
83			/* Is this space blocked? Players with wizpass are immune to
84			* this condition.
85			*/
86			if(blocked_link(op, m, newx, newy) &&
87			!QUERY_FLAG(op, FLAG_WIZPASS))
88	root	1.4	return 0;
89	elmex	1.1
90			/* 0.94.2 - we need to set the direction for the new animation code.
91			* it uses it to figure out face to use - I can't see it
92			* breaking anything, but it might.
93			*/
94			if(op->more != NULL && !move_ob(op->more, dir, op->more->head))
95	root	1.4	return 0;
96	elmex	1.1
97			op->direction = dir;
98
99			if(op->will_apply&4)
100	root	1.4	check_earthwalls(op,m, newx,newy);
101	elmex	1.1	if(op->will_apply&8)
102	root	1.4	check_doors(op,m, newx,newy);
103	elmex	1.1
104			/* 0.94.1 - I got a stack trace that showed it crash with remove_ob trying
105			* to remove a removed object, and this function was the culprit. A possible
106			* guess I have is that check_doors above ran into a trap, killing the
107			* monster.
108			*
109			* Unfortunately, it doesn't appear that the calling functions of move_object
110			* deal very well with op being killed, so all this might do is just
111			* migrate the problem someplace else.
112			*/
113
114			if (QUERY_FLAG(op, FLAG_REMOVED)) {
115	root	1.4	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			/* 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	root	1.4	return 1;
125	elmex	1.1
126			remove_ob(op);
127
128			/* 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	root	1.4	tmp->x += freearr_x[dir];
134			tmp->y += freearr_y[dir];
135			tmp->map = get_map_from_coord(tmp->map, &tmp->x, &tmp->y);
136	elmex	1.1	}
137
138			/* insert_ob_in_map will deal with any tiling issues */
139			insert_ob_in_map(op, m, originator,0);
140
141			return 1; /* this shouldn't be reached */
142			}
143
144
145			/*
146			* transfer_ob(): Move an object (even linked objects) to another spot
147			* on the same map.
148			*
149			* Does nothing if there is no free spot.
150			*
151			* randomly: If true, use find_free_spot() to find the destination, otherwise
152			* use find_first_free_spot().
153			*
154			* Return value: 1 if object was destroyed, 0 otherwise.
155			*/
156
157			int transfer_ob (object op, int x, int y, int randomly, object originator)
158			{
159			int i;
160			object *tmp;
161
162			if (randomly)
163	root	1.4	i = find_free_spot (op,op->map,x,y,0,SIZEOFFREE);
164	elmex	1.1	else
165	root	1.4	i = find_first_free_spot(op,op->map,x,y);
166	elmex	1.1
167			if (i==-1)
168	root	1.4	return 0; /* No free spot */
169	elmex	1.1
170			if(op->head!=NULL)
171	root	1.4	op=op->head;
172	elmex	1.1	remove_ob(op);
173			for(tmp=op;tmp!=NULL;tmp=tmp->more)
174	root	1.4	tmp->x=x+freearr_x[i]+(tmp->arch==NULL?0:tmp->arch->clone.x),
175			tmp->y=y+freearr_y[i]+(tmp->arch==NULL?0:tmp->arch->clone.y);
176	elmex	1.1
177			tmp = insert_ob_in_map(op,op->map,originator,0);
178			if (tmp) return 0;
179			else return 1;
180			}
181
182			/*
183			* Return value: 1 if object was destroyed, 0 otherwise.
184			* Modified so that instead of passing the 'originator' that had no
185			* real use, instead we pass the 'user' of the teleporter. All the
186			* callers know what they wanted to teleporter (move_teleporter or
187			* shop map code)
188			* tele_type is the type of teleporter we want to match against -
189			* currently, this is either set to SHOP_MAT or TELEPORTER.
190			* It is basically used so that shop_mats and normal teleporters can
191			* be used close to each other and not have the player put to the
192			* one of another type.
193			*/
194			int teleport (object teleporter, uint8 tele_type, object user)
195			{
196			object *altern;
197			int i,j,k,nrofalt=0;
198			object other_teleporter, tmp;
199			mapstruct *m;
200			sint16 sx, sy;
201
202			if(user==NULL) return 0;
203			if(user->head!=NULL)
204	root	1.4	user=user->head;
205	elmex	1.1
206			/* Find all other teleporters within range. This range
207			* should really be setable by some object attribute instead of
208			* using hard coded values.
209			*/
210			for(i= -5;i<6;i++)
211	root	1.4	for(j= -5;j<6;j++) {
212			if(i==0&&j==0)
213			continue;
214			/* Perhaps this should be extended to support tiled maps */
215			if(OUT_OF_REAL_MAP(teleporter->map,teleporter->x+i,teleporter->y+j))
216			continue;
217			other_teleporter=get_map_ob(teleporter->map,
218	elmex	1.1	teleporter->x+i,teleporter->y+j);
219
220	root	1.4	while (other_teleporter) {
221			if (other_teleporter->type == tele_type) break;
222			other_teleporter = other_teleporter->above;
223			}
224			if (other_teleporter && !(RANDOM() % ++nrofalt))
225			altern = other_teleporter;
226			}
227	elmex	1.1
228			if(!nrofalt) {
229	root	1.4	LOG(llevError,"No alternative teleporters around!\n");
230			return 0;
231	elmex	1.1	}
232
233			other_teleporter=altern;
234			k=find_free_spot(user,other_teleporter->map,
235			other_teleporter->x,other_teleporter->y,1,9);
236
237			/* if k==-1, unable to find a free spot. If this is shop
238			* mat that the player is using, find someplace to move
239			* the player - otherwise, player can get trapped in the shops
240			* that appear in random dungeons. We basically just make
241			* sure the space isn't no pass (eg wall), and don't care
242			* about is alive.
243			*/
244			if (k==-1) {
245	root	1.4	if (tele_type == SHOP_MAT && user->type == PLAYER) {
246			for (k=1; k<9; k++) {
247			if (get_map_flags(other_teleporter->map, &m,
248			other_teleporter->x + freearr_x[k],
249			other_teleporter->y + freearr_y[k], &sx,&sy) &
250			P_OUT_OF_MAP) continue;
251
252			if (!OB_TYPE_MOVE_BLOCK(user, GET_MAP_MOVE_BLOCK(m, sx, sy))) break;
253
254			}
255			if (k==9) {
256			LOG(llevError,"Shop mat %s (%d, %d) is in solid rock?\n",
257			other_teleporter->name, other_teleporter->x, other_teleporter->y);
258			return 0;
259			}
260			}
261			else return 0;
262	elmex	1.1	}
263
264			remove_ob(user);
265
266			/* Update location for the object */
267			for(tmp=user;tmp!=NULL;tmp=tmp->more) {
268	root	1.4	tmp->x=other_teleporter->x+freearr_x[k]+
269	elmex	1.1	(tmp->arch==NULL?0:tmp->arch->clone.x);
270	root	1.4	tmp->y=other_teleporter->y+freearr_y[k]+
271	elmex	1.1	(tmp->arch==NULL?0:tmp->arch->clone.y);
272			}
273			tmp = insert_ob_in_map(user,other_teleporter->map,NULL,0);
274			return (tmp == NULL);
275			}
276
277			void recursive_roll(object op,int dir,object pusher) {
278			if(!roll_ob(op,dir,pusher)) {
279			new_draw_info_format(NDI_UNIQUE, 0, pusher,
280	root	1.4	"You fail to push the %s.",query_name(op));
281	elmex	1.1	return;
282			}
283			(void) move_ob(pusher,dir,pusher);
284			new_draw_info_format(NDI_BLACK, 0, pusher,
285	root	1.4	"You move the %s.",query_name(op));
286	elmex	1.1	return;
287			}
288
289			/*
290			* This is a new version of blocked, this one handles objects
291			* that can be passed through by monsters with the CAN_PASS_THRU defined.
292			*
293			* very new version handles also multipart objects
294			* This is currently only used for the boulder roll code.
295			* Returns 1 if object does not fit, 0 if it does.
296			*/
297
298			int try_fit (object op, mapstruct m, int x, int y)
299			{
300			object tmp, more;
301			sint16 tx, ty;
302			int mflags;
303			mapstruct *m2;
304
305			if (op->head)
306	root	1.4	op = op->head;
307	elmex	1.1
308			for (more = op; more ; more = more->more) {
309	root	1.4	tx = x + more->x - op->x;
310			ty = y + more->y - op->y;
311	elmex	1.1
312	root	1.4	mflags = get_map_flags(m, &m2, tx, ty, &tx, &ty);
313	elmex	1.1
314	root	1.4	if (mflags & P_OUT_OF_MAP)
315			return 1;
316	elmex	1.1
317	root	1.4	for (tmp = get_map_ob (m2, tx, ty); tmp; tmp=tmp->above) {
318			if (tmp->head == op \|\| tmp == op)
319			continue;
320	elmex	1.1
321	root	1.4	if ((QUERY_FLAG(tmp,FLAG_ALIVE) && tmp->type!=DOOR))
322			return 1;
323	elmex	1.1
324	root	1.4	if (OB_MOVE_BLOCK(op, tmp)) return 1;
325	elmex	1.1
326	root	1.4	}
327	elmex	1.1	}
328			return 0;
329			}
330
331			/*
332			* this is not perfect yet.
333			* it does not roll objects behind multipart objects properly.
334			* Support for rolling multipart objects is questionable.
335			*/
336
337			int roll_ob(object op,int dir, object pusher) {
338			object *tmp;
339			sint16 x, y;
340			int flags;
341			mapstruct *m;
342			MoveType move_block;
343
344			if (op->head)
345	root	1.4	op = op->head;
346	elmex	1.1
347			x=op->x+freearr_x[dir];
348			y=op->y+freearr_y[dir];
349
350			if(!QUERY_FLAG(op,FLAG_CAN_ROLL) \|\|
351			(op->weight &&
352			random_roll(0, op->weight/50000-1, pusher, PREFER_LOW) > pusher->stats.Str))
353	root	1.4	return 0;
354	elmex	1.1
355			m = op->map;
356			flags = get_map_flags(m, &m, x, y, &x, &y);
357
358			if (flags & (P_OUT_OF_MAP \| P_IS_ALIVE))
359	root	1.4	return 0;
360	elmex	1.1
361			move_block = GET_MAP_MOVE_BLOCK(m, x, y);
362
363			/* If the target space is not blocked, no need to look at the objects on it */
364			if ((op->move_type & move_block) == op->move_type) {
365	root	1.4	for (tmp=get_map_ob(m, x, y); tmp!=NULL; tmp=tmp->above) {
366			if (tmp->head == op)
367			continue;
368			if (OB_MOVE_BLOCK(op, tmp) && !roll_ob(tmp,dir,pusher))
369			return 0;
370			}
371	elmex	1.1	}
372			if (try_fit (op, m, x, y))
373	root	1.4	return 0;
374	elmex	1.1
375			remove_ob(op);
376			for(tmp=op; tmp!=NULL; tmp=tmp->more)
377	root	1.4	tmp->x+=freearr_x[dir],tmp->y+=freearr_y[dir];
378	elmex	1.1	insert_ob_in_map(op,op->map,pusher,0);
379			return 1;
380			}
381
382			/* returns 1 if pushing invokes a attack, 0 when not */
383			int push_ob(object who, int dir, object pusher) {
384			int str1, str2;
385			object *owner;
386
387			if (who->head != NULL)
388	root	1.4	who = who->head;
389	elmex	1.1	owner = get_owner(who);
390
391			/* Wake up sleeping monsters that may be pushed */
392			CLEAR_FLAG(who,FLAG_SLEEP);
393
394			/* player change place with his pets or summoned creature */
395			/* TODO: allow multi arch pushing. Can't be very difficult */
396			if (who->more == NULL
397			#ifdef COZY_SERVER
398			&&
399			(
400			(owner && owner->contr && pusher->contr
401			&& same_party (owner->contr->party, pusher->contr->party))
402			\|\| owner == pusher
403			)
404			#else
405			&& owner == pusher
406			#endif
407			) {
408	root	1.4	int temp;
409			mapstruct *m;
410	elmex	1.1
411	root	1.4	remove_ob(who);
412			remove_ob(pusher);
413			temp = pusher->x;
414			pusher->x = who->x;
415			who->x = temp;
416
417			temp = pusher->y;
418			pusher->y = who->y;
419			who->y = temp;
420
421			m = pusher->map;
422			pusher->map = who->map;
423			who->map = m;
424
425			insert_ob_in_map (who,who->map,pusher,0);
426			insert_ob_in_map (pusher,pusher->map,pusher,0);
427			return 0;
428	elmex	1.1	}
429
430
431			/* We want ONLY become enemy of evil, unaggressive monster. We must RUN in them */
432			/* In original we have here a unaggressive check only - that was the reason why */
433			/* we so often become an enemy of friendly monsters... */
434			/* funny: was they set to unaggressive 0 (= not so nice) they don't attack */
435
436			if(owner != pusher && pusher->type == PLAYER && who->type != PLAYER &&
437			!QUERY_FLAG(who,FLAG_FRIENDLY)&& !QUERY_FLAG(who,FLAG_NEUTRAL)) {
438	root	1.4	if(pusher->contr->run_on) /* only when we run */ {
439			new_draw_info_format(NDI_UNIQUE, 0, pusher,
440	elmex	1.1	"You start to attack %s !!",who->name);
441	root	1.4	CLEAR_FLAG(who,FLAG_UNAGGRESSIVE); /* the sucker don't like you anymore */
442			who->enemy = pusher;
443			return 1;
444			}
445			else
446			{
447			new_draw_info_format(NDI_UNIQUE, 0, pusher,
448			"You avoid attacking %s .",who->name);
449			}
450	elmex	1.1	}
451
452			/* now, lets test stand still. we NEVER can push stand_still monsters. */
453			if(QUERY_FLAG(who,FLAG_STAND_STILL))
454			{
455	root	1.4	new_draw_info_format(NDI_UNIQUE, 0, pusher,
456	elmex	1.1	"You can't push %s.",who->name);
457	root	1.4	return 0;
458	elmex	1.1	}
459
460			/* This block is basically if you are pushing friendly but
461			* non pet creaturs.
462			* It basically does a random strength comparision to
463			* determine if you can push someone around. Note that
464			* this pushes the other person away - its not a swap.
465			*/
466
467			str1 = (who->stats.Str>0?who->stats.Str:who->level);
468			str2 = (pusher->stats.Str>0?pusher->stats.Str:pusher->level);
469			if(QUERY_FLAG(who,FLAG_WIZ) \|\|
470			random_roll(str1, str1/2+str1*2, who, PREFER_HIGH) >=
471			random_roll(str2, str2/2+str2*2, pusher, PREFER_HIGH) \|\|
472			!move_object(who,dir))
473			{
474	root	1.4	if (who ->type == PLAYER) {
475			new_draw_info_format(NDI_UNIQUE, 0, who,
476			"%s tried to push you.",pusher->name);
477			}
478			return 0;
479	elmex	1.1	}
480
481			/* If we get here, the push succeeded.
482			* Let everyone know the status.
483			*/
484			if (who->type == PLAYER) {
485	root	1.4	new_draw_info_format(NDI_UNIQUE, 0, who,
486			"%s pushed you.",pusher->name);
487	elmex	1.1	}
488			if (pusher->type == PLAYER) {
489	root	1.4	new_draw_info_format(NDI_UNIQUE, 0, pusher,
490			"You pushed %s back.", who->name);
491	elmex	1.1	}
492
493			return 1;
494			}