nexus/move.c

#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ai.h"
#include "attack.h"
#include "defs.h"
#include "flag.h"
#include "god.h"
#include "io.h"
#include "lf.h"
#include "map.h"
#include "move.h"
#include "nexus.h"
#include "objects.h"
#include "spell.h"
#include "text.h"

extern lifeform_t *player;

extern int statdirty;
extern int needredraw;

extern enum GAMEMODE gamemode;

extern void (*precalclos)(lifeform_t *);

extern enum ERROR reason;
extern void *rdata;

extern long curtime;

extern WINDOW *gamewin, *msgwin;

int canandwillmove(lifeform_t *lf, int dir, enum ERROR *error) {
	if (isplayer(lf)) {
		if (ispossiblemove(lf, dir)) {
			return B_TRUE;
		}
	} else {
		if (ispossiblemove(lf, dir) && willmove(lf, dir, error)) {
			return B_TRUE;
		}
	}
	return B_FALSE;
}

int isorthogonal(int dir) {
	switch (dir) {
		case D_N:
		case D_E:
		case D_S:
		case D_W:
		case DC_N:
		case DC_E:
		case DC_S:
		case DC_W:
			return B_TRUE;
	}
	return B_FALSE;
}

// ie.  moving into a wall isn't possible
//      moving into a lf/door IS possible since you will attack/open it
//	moving while grabbed IS possible since you'll try to break free
int ispossiblemove(lifeform_t *lf, int dir) {
	enum ERROR error;
	if (moveclear(lf, dir, &error)) {
		return B_TRUE;
	} else {
		object_t *inway = NULL;
		switch (error) {
			case E_OFFMAP:
				if (lf->cell->map->region == RG_WORLDMAP) {
					return B_TRUE;
				}
				break;
			case E_CANTMOVE:
			case E_GRABBEDBY:
			case E_TOOHEAVY:
			case E_LFINWAY:
				return B_TRUE;
			case E_DOORINWAY:
				if (canopendoors(lf)) {
					return B_TRUE;
				}
				break;
			case E_OBINWAY:
				inway = (object_t *)rdata;
				if (inway && ispushable(inway)) {
					// player can always try pushing...
					if (isplayer(lf)) {
						return B_TRUE;
					} else {
						// for ai, move is only 'possible' if
						// we are strong enough to push the object. 
						if (canpush(lf, inway, dir)) {
							return B_TRUE;
						} 
					}
				}
				break;
			default:
				break;
		}
	}
	return B_FALSE;
}

// lf is the one moving, lf2 is the one who is being forced to swap
int canswapwith(lifeform_t *lf, lifeform_t *lf2) {
	// player can never be forced to swap
	if (isplayer(lf2)) {
		return B_FALSE;
	}

	// mosnters don't swap with people who have F_NOSWAP.
	if (!isplayer(lf) && lfhasflag(lf2, F_NOSWAP)) {
		return B_FALSE;
	}

	// cannot swap if lf's cell is dangerous to lf2
	if (celldangerous(lf2, lf->cell, B_FALSE, NULL)) {
		return B_FALSE;
	}

	// cannot swap with sleeping lfs
	if (lfhasflag(lf2, F_ASLEEP)) {
		return B_FALSE;
	}
	
	// allies can always swap
	if (areallies(lf, lf2)) {
		return B_TRUE;
	}
	if (isplayer(lf) && !areenemies(lf, lf2)) {
		// player can swap with peaceful lgs
		// if they are a lot smaller
		if (getlfsize(lf) - getlfsize(lf2) >= 2) {
			return B_TRUE;
		}
	}
	return B_FALSE;
}

// will populate rdata
//  onlyifknown = true means "check for _known_ dangerous objects"
//  onlyifknown = false means "check for _any dangerous objects, doesn't matter if we know about them"
int celldangerous(lifeform_t *lf, cell_t *cell, int onlyifknown, enum ERROR *error) {
	enum ATTRBRACKET wis;
	int include_nonobvious = B_FALSE;
	flag_t *f;
	object_t *o;

	// default
	if (error) {
		*error = E_OK;
		rdata = NULL;
	}

	// never dangerous if there's someone there, since we'll
	// attack them instead of moving!
	if (cell->lf) {
		return B_FALSE;
	}

	// obvious things that you can see
	if (!onlyifknown || (haslos(lf, cell) && !lfhasflag(lf, F_UNDEAD))) {
		// water needing creature out of water?
		if (lfhasflag(lf, F_NEEDSWATER)) {
			if (!hasobwithflag(cell->obpile, F_DEEPWATER)) {
				if (error) {
					*error = E_DANGEROUS;
				} 
				return B_TRUE;
			}
		}

		for (o = cell->obpile->first ; o ; o = o->next) {
			if (onlyifknown && !canseeob(lf, o)) continue;
			if (hasflag(o->flags, F_TRAP)) {
				if (error) {
					*error = E_AVOIDOB;
					rdata = o;
				} 
				return B_TRUE;
			}
			if (o->type->id == OT_PENTAGRAM) { 
				// this is only dangerous for the player
				if (isplayer(lf)) {
					object_t *oo;
					// any blessed objects in your pack?
					for (oo = lf->pack->first ; oo ; oo = oo->next) {
						if (oo->blessknown && isblessed(oo)) {
							if (error) {
								*error = E_AVOIDOB;
								rdata = o;
							} 
							return B_TRUE;
						}
					}
				}
			}
			f = hasflag(o->flags, F_PIT);
			if (f && (f->val[0] == D_DOWN)) {
				if (!isairborne(lf)) {
					if (error) {
						*error = E_AVOIDOB;
						rdata = o;
					} 
					return B_TRUE;
				}
			}
			f = hasflag(o->flags, F_DEEPWATER);
			if (f) {
				// non swimming creature in water?
				if (!isairborne(lf) && (getobdepth(o, lf) >= DP_HEAD)) {
					if (getskill(lf, SK_SWIMMING) - isburdened(lf) <= 0) {
						if (error) {
							*error = E_AVOIDOB;
							rdata = o;
						} 
						return B_TRUE;
					}
				}
			}
			f = obrestrictsmovement(o, lf);
			if (f) {
				// always avoid if possible
				if (error) {
					*error = E_AVOIDOB;
					rdata = o;
				} 
				return B_TRUE;
			}
			f = hasflag(o->flags, F_WALKDAM);
			if (f) {
				if ((f->val[0] != DT_WATER) || isvulnto(lf->flags, DT_WATER)) {
					// are we immune to this?
					if (!lfhasflagval(lf, F_DTIMMUNE, f->val[0], NA, NA, NULL)) {
						if (error) {
							*error = E_AVOIDOB;
							rdata = o;
						} 
						return B_TRUE;
					}
				}
			}
		}
	}

	// non-obvious things - only include these if we are smart enough
	if (!onlyifknown) {
		include_nonobvious = B_TRUE;
	} else {
		wis = getattrbracket(getattr(lf, A_WIS), A_WIS, NULL);
		if ((wis >= AT_AVERAGE) && haslos(lf, cell)) {
			if (!lfhasflag(lf, F_UNDEAD)) {
				include_nonobvious = B_TRUE;	
			}
		}
	}
	if (include_nonobvious) {
		for (o = cell->obpile->first ; o ; o = o->next) {
			// don't walk on sharp objects without boots
			if (hasflag(o->flags, F_SHARP)) {
				if (!getequippedob(lf->pack, BP_FEET)) {
					if (error) {
						*error = E_AVOIDOB;
						rdata = o;
					} 
					return B_TRUE;
				}
			}
		}
	}
	return B_FALSE;
}

int cellwalkable(lifeform_t *lf, cell_t *cell, enum ERROR *error) {
	object_t *o;
	// default
	if (error) {
		*error = E_OK;
		rdata = NULL;
	}
	if (!cell) {
		if (error) *error = E_OFFMAP;
		return B_FALSE;
	}
	if (cell->type->solid) {
		// mover is noncorporeal?
		if (lf && lfhasflag(lf, F_NONCORPOREAL)) {
			if (error) *error = E_WALLINWAY; // ok but still set reason
			// ok
		} else if (cell->lf && (cell->lf != lf)) { // someone (else) in the wall?
			if (error) *error = E_LFINWAY; // ok but still set reason
			//return B_FALSE;
			// ok
		} else {
			if (error) *error = E_WALLINWAY;
			return B_FALSE;
		}
	}

	// must check for lf before checking for impassable objects,
	// so that we are able to attack monsters embedded in walls.
	if (cell->lf && (cell->lf != lf)) {
		// usually can't attack while swimming
		if (lf && isswimming(lf) && (getskill(lf, SK_SWIMMING) <= PR_EXPERT)) {
			if (!lfhasflag(lf, F_AQUATIC)) {
				if (error) *error = E_SWIMMING;
				return B_FALSE;
			}
		}

		if (error) *error = E_LFINWAY;
		return B_FALSE;
	}
	for (o = cell->obpile->first ; o ; o = o->next) {
		if (isimpassableob(o, lf)) {
			if (lf) {  
				enum MATERIAL mid;
				mid = getlfmaterial(lf);
				if ((mid == MT_GAS) || 
					(mid == MT_SLIME)) {
					// ok
				} else if (lfhasflag(lf, F_NONCORPOREAL) && !hasflag(o->flags, F_REALLYIMPASSABLE)) {
					// ok but still set error
					*error = E_OBINWAY;
				} else {
					// not ok
					rdata = o;
					if (error) {
						if (isdoor(o, NULL)) {
							if (hasflag(o->flags, F_SECRET)) {
								*error = E_WALLINWAY;
							} else {
								*error = E_DOORINWAY;
							}
						} else {
							*error = E_OBINWAY;
						}
					}
					return B_FALSE;
				}
			} else {
				rdata = o;
				if (error) {
					if (isdoor(o, NULL)) {
						*error = E_DOORINWAY;
					} else {
						*error = E_OBINWAY;
					}
				}
				return B_FALSE;
			}
		}
	}

	return B_TRUE;
}

enum RELATIVEDIR getrelativedir(lifeform_t *lf, int dir) {
	int tempdir;

	if (lfhasflag(lf, F_AWARENESS)) return RD_FORWARDS;

	// facing N, dir N == forwards
	if (lf->facing == dir) return RD_FORWARDS;

	// facing N, dir NE == forwards
	tempdir = lf->facing + 1;  if (tempdir > DC_NW) tempdir -= MAXDIR_COMPASS;
	if (tempdir == dir) return RD_FORWARDS;
	// facing N, dir NW == forwards
	tempdir = lf->facing - 1;  if (tempdir < DC_N) tempdir += MAXDIR_COMPASS;
	if (tempdir == dir) return RD_FORWARDS;

	// facing N, dir E == sideways
	tempdir = lf->facing + 2;  if (tempdir > DC_NW) tempdir -= MAXDIR_COMPASS;
	if (tempdir == dir) return RD_SIDEWAYS;
	// facing N, dir W == sideways
	tempdir = lf->facing - 2;  if (tempdir < DC_N) tempdir += MAXDIR_COMPASS;
	if (tempdir == dir) return RD_SIDEWAYS;
	
	// anything else is backwards
	return RD_BACKWARDS;
}

int diropposite(int dir) {
	switch (dir) {
		case D_N:
			return D_S;
		case D_E:
			return D_W;
		case D_S:
			return D_N;
		case D_W:
			return D_E;
		case DC_N:
			return DC_S;
		case DC_NE:
			return DC_SW;
		case DC_E:
			return DC_W;
		case DC_SE:
			return DC_NW;
		case DC_S:
			return DC_N;
		case DC_SW:
			return DC_NE;
		case DC_W:
			return DC_E;
		case DC_NW:
			return DC_SE;
		case D_UP:
			return D_DOWN;
		case D_DOWN:
			return D_UP;
	}
	// should never happen!
	return dir;
}

// restonfail means "if we can't find any valid moves, just rest"
// returns true on error
int dorandommove(lifeform_t *lf, int badmovesok, int restonfail) {
	int dir;
	int tries = 0;
	int moveok,rv;
	enum ERROR why;

	// find a valid direction
	dir = getrandomdir(DT_COMPASS);

	moveok = canandwillmove(lf, dir, &why);

	if (!moveok && badmovesok) {
		switch (why) {
			// actually okay to move into someone
			case E_WALLINWAY:
			case E_LFINWAY:
				moveok = B_TRUE;
				break;
			default:
				break;
		}
	}
	while (!moveok) {
		// try next direction...
		if (++dir > DC_NW) dir = DC_N;
		if (++tries >= MAXDIR_COMPASS) {	
			if (restonfail) {
				rest(lf, B_TRUE);
			}
			return B_TRUE;
		}

		// check this direction...
		moveok = canandwillmove(lf, dir, &why);
		if (!moveok && badmovesok) {
			switch (why) {
				case E_WALLINWAY:
				case E_LFINWAY:
					moveok = B_TRUE;
					break;
				default:
					break;
			}
		}
	}
	rv = trymove(lf, dir, B_TRUE, B_FALSE);
	if (rv && restonfail) {
		// ie move failed
		rest(lf, B_TRUE);
	}
	return rv;
}



// src is where something is
// dst is what we are going away from
// if srclf is set, it is used for cellwalkable() checks. ie. if move will be involuntary, don't set this!
// wantcheck is whether to check for dangerous things before considering a direction valid
int getdiraway(cell_t *src, cell_t *dst, lifeform_t *srclf, int wantcheck, int dirtype, int keepinlof) {
	int d;
	cell_t *c;
	int maxdist=-1,bestdir=D_NONE;
	int dist[MAXDIR_COMPASS];
	int poss[MAXDIR_COMPASS];
	int nposs;
	enum ERROR error;

	if (dirtype == DT_ORTH) {
		maxdist = getcelldistorth(src, dst);
	} else {
		maxdist = getcelldist(src, dst);
	}
	
	for (d = DC_N; d <= DC_NW; d++) {
		dist[d - DC_N] = -1;
	}
	for (d = DC_N; d <= DC_NW; d++) {
		int thisdist = -1;
		int ok = B_FALSE;
		c = getcellindir(src, d);
		if (!c) continue;

		if (c == dst) {
			// destination is the thing we're fleeing from!
			thisdist = 0;
		} else {
			if (wantcheck) {
				if (srclf) {
					if (canandwillmove(srclf, d, &error)) {
						ok = B_TRUE;
					} else if (error == E_DOORINWAY) {
						ok = B_TRUE;
					}
				} else {
					ok = B_TRUE;
				}
			} else {
				if (srclf) {
					if (cellwalkable(srclf, c, &error)) {
						ok = B_TRUE;
					} else if (error == E_DOORINWAY) {
						ok = B_TRUE;
					}
				} else {
					ok = B_TRUE;
				}
			}

			if (keepinlof) {
				if (!haslof(c, dst, LOF_NEED, NULL)) {
					ok = B_FALSE;
				}
			}

			if (ok) {
				if (dirtype == DT_ORTH) {
					thisdist = getcelldistorth(c, dst);
				} else {
					thisdist = getcelldist(c, dst);
				}
			} else {
				thisdist = -1;
			}
		}

		dist[d - DC_N] = thisdist;
		if (thisdist >= maxdist) {
			maxdist = thisdist;
			bestdir = d;
		}
	}

	nposs = 0;
	for (d = DC_N; d <= DC_NW; d++) {
		if (dist[d - DC_N] != -1) {
			if (dist[d - DC_N] == maxdist) {
				poss[nposs] = d;
				nposs++;
			}
		}
	}

	if (nposs <= 0) {
		return D_NONE;
	}
	bestdir = poss[rnd(0,nposs-1)];
	reason = E_OK;

	return bestdir;
}


int getdirtowards(cell_t *src, cell_t *dst, lifeform_t *srclf, int wantcheck, int dirtype) {
	int d;
	cell_t *c;
	int mindist=9999,bestdir=D_NONE;
	int dist[MAXDIR_COMPASS];
	int poss[MAXDIR_COMPASS];
	int nposs;
	enum ERROR error;

	if (dirtype == DT_ORTH) {
		mindist = getcelldistorth(src, dst);
	} else {
		mindist = getcelldist(src, dst);
	}

	for (d = DC_N; d <= DC_NW; d++) {
		dist[d - DC_N] = -1;
	}

	for (d = DC_N; d <= DC_NW; d++) {
		int ok = B_FALSE;
		int thisdist;
		c = getcellindir(src, d);
		if (!c) continue;

		if (c == dst) {
			dist[d - DC_N] = 0;
			mindist = 0;
			break;
		}
		
		if (wantcheck) {
			if (srclf) {
				if (canandwillmove(srclf, d, &error)) {
					ok = B_TRUE;
				} else if (error == E_DOORINWAY) {
					ok = B_TRUE;
				}
			} else {
				ok = B_TRUE;
			}
		} else {
			if (srclf) {
				if (cellwalkable(srclf, c, &error)) {
					ok = B_TRUE;
				} else if (error == E_DOORINWAY) {
					ok = B_TRUE;
				}
			} else {
				ok = B_TRUE;
			}
		}

		// get distance
		if (ok) {
			if (dirtype == DT_ORTH) {
				thisdist = getcelldistorth(c, dst);
			} else {
				thisdist = getcelldist(c, dst);
			}

			if (thisdist <= mindist) {
				dist[d - DC_N] = thisdist;
				mindist = thisdist;
			} else {
				// don't move AWAY from them.
				dist[d - DC_N] = -1;
			}
		} else {
			dist[d - DC_N] = -1; // ie. invalid
		}
	}

	// handle ties
	nposs = 0;
	for (d = DC_N; d <= DC_NW; d++) {
		if (dist[d - DC_N] != -1) {
			if (dist[d - DC_N] == mindist) {
				poss[nposs] = d;
				nposs++;
			}
		}
	}

	if (nposs <= 0) {
		return D_NONE;
	}
	bestdir = poss[rnd(0,nposs-1)];
	reason = E_OK;

	return bestdir;
}

int getwalkoffdir(lifeform_t *lf, int dir) {
	switch (dir) {
		case DC_NE:
			if (lf->cell->y == 0) {
				return D_N;
			} else if ( lf->cell->x == (lf->cell->map->w-1)) {
				return D_E;
			}
			break;
		case DC_SE:
			if (lf->cell->y == (lf->cell->map->h-1)) {
				return D_S;
			} else if ( lf->cell->x == (lf->cell->map->w-1)) {
				return D_E;
			}
			break;
		case DC_SW:
			if (lf->cell->y == (lf->cell->map->h-1)) {
				return D_S;
			} else if ( lf->cell->x == 0) {
				return D_W;
			}
			break;
		case DC_NW:
			if (lf->cell->y == 0) {
				return D_N;
			} else if ( lf->cell->x == 0) {
				return D_W;
			}
			break;
	}
	return D_NONE;
}

// use 'n/a' for zero chance of falling. 0 means 'calculate based on distance'
int knockback(lifeform_t *lf, int dir, int howfar, lifeform_t *pusher, int fallcheckdiff, int wantannounce) {
	int i,dam;
	char lfname[BUFLEN];
	char newlfname[BUFLEN];
	int seen;
	int mightfall = B_TRUE;
	lifeform_t *newlf;

	if (lfhasflag(lf, F_GRAVLESSENED)) {
		howfar *= 2;
	} else if (lfhasflag(lf, F_GRAVBOOSTED)) {
		howfar /= 2;
		if (howfar < 0) howfar = 0;
	}

	// calculate chance of falling
	if (fallcheckdiff == 0) {
		// chance based on distance
		fallcheckdiff = howfar*10;
	}

	getlfname(lf,lfname);
	if (cansee(player, lf)) {
		seen = B_TRUE;
	} else {
		seen = B_FALSE;
	}

	if (dir == D_NONE) {
		// failed!
		return B_TRUE;
	}

	// if levitating (not flying), knocked back further.
	if (lfhasflag(lf, F_LEVITATING)) {
		howfar *= 2;
	}

	breakgrabs(lf, B_TRUE, B_TRUE);
	
	for (i = 0; i < howfar; i++) {
		if (moveclear(lf, dir, &reason)) {
			if ((i == 0) && seen && wantannounce) {
				msg("%s %s knocked backwards!",lfname,is(lf));
			}
			trymove(lf, dir, B_FALSE, B_FALSE);
		}

		if (reason != E_OK) {
			char buf[BUFLEN];
			char thing[BUFLEN];
			cell_t *newcell;
			newcell = getcellindir(lf->cell, dir);
			// failed to move
			switch (reason) {
				case E_OFFMAP:
					if (lf->cell->map->region == RG_WORLDMAP) {
						if (!walkoffmap(lf, dir, B_FALSE)) {
							// successful
							break;
						}
					}
					// fall through
				case E_WALLINWAY:
				case E_OBINWAY:
				case E_DOORINWAY:
					if (reason == E_WALLINWAY) {
						if (newcell) strcpy(thing, newcell->type->name);
							else strcpy(thing, "wall");
					} else { // ie door or object
						getobname(rdata, thing, 1);
					}
					if (seen) msg("%s slam%s into %s!",lfname,isplayer(lf) ? "" : "s", thing);
					snprintf(buf, BUFLEN, "slamming into %s", thing);
					dam = roll("1d6");
					losehp(lf, dam, DT_BASH, pusher, buf);
					// stop moving
					i = howfar;
					// don't fall
					mightfall = B_FALSE;
					if (onein(3)) criticalhit(NULL, lf, getrandomcorebp(lf), dam, DT_BASH);
					break;
				case E_SWIMMING:
				case E_LFINWAY:
					newcell = getcellindir(lf->cell, dir);
					newlf = newcell->lf;
					if (newlf) { // should always be true
						int momentumleft;
						getlfname(newlf, newlfname);
						if (seen) msg("%s slam%s into %s!",lfname,isplayer(lf) ? "" : "s",newlfname);
						// remember our momentum
						momentumleft = howfar - i;
						// stop moving
						i = howfar;
						// higher chance of both falling
						if (fallcheckdiff != NA) {
							fallcheckdiff += (momentumleft*5);
						}
						// confer our remaining momentum on to them 
						knockback(newcell->lf, dir, momentumleft, lf, fallcheckdiff, B_TRUE); // NOTE: recursive call
					}
					break;
				default:
					break;
			}
		}
	}

	if (fallcheckdiff == NA) {
		mightfall = B_FALSE;
	}

	if (mightfall) {
		// save to avoid falling
		if (!skillcheck(lf, SC_FALL, fallcheckdiff, 0)) {
			fall(lf, NULL, B_TRUE);
		}
	}
	return B_FALSE;
}

int makeorthogonal(int dir) {
	switch (dir) {
		case DC_N: 
		case D_N:
			return D_N;
		case DC_E: 
		case D_E:
			return D_E;
		case DC_S: 
		case D_S:
			return D_S;
		case DC_W: 
		case D_W:
			return D_W;
	}
	return D_NONE;
}

// see 'movetowards' for description of dirtype
int moveawayfrom(lifeform_t *lf, cell_t *dst, int dirtype, int keepinlof, int strafe ) {
	int dir;
	int rv = B_TRUE;

	if (isblind(lf)) {
		dorandommove(lf, B_TRUE, B_TRUE);
		return B_FALSE;
	}

	// move away from them
	dir = getdiraway(lf->cell, dst, lf, B_TRUE, dirtype, keepinlof);
	if (dir == D_NONE) {
		rv = B_TRUE;
	} else {
		rv = trymove(lf, dir, B_TRUE, strafe);
	}
	return rv;
}

// ie. is the destination cell free?
int moveclear(lifeform_t *lf, int dir, enum ERROR *error) {
	cell_t *cell;
	flag_t *f;

	// default
	if (error) {
		*error = E_OK;
		rdata = NULL;
	}

	if (isburdened(lf) >= BR_OVERLOADED) {
		if (error) *error = E_TOOHEAVY;
		return B_FALSE;
	}

	// check if we are paralyzed, frozen, etc
	if (isimmobile(lf)) {
		if (error) *error = E_CANTMOVE;
		return B_FALSE;
	}

	cell = getcellindir(lf->cell, dir);
	if (!cell) {
		if (error) *error = E_OFFMAP;
		return B_FALSE;
	}

	f = lfhasflag(lf, F_GRABBEDBY);
	if (f) {
		lifeform_t *lf2;
		lf2 = findlf(NULL, f->val[0]);
		if (lf2  && (lf2 != cell->lf)) {
			if (error) {
				rdata = lf2;
				*error = E_GRABBEDBY;
			}
			return B_FALSE;
		}
	}

	if ((lf->race->raceclass->id == RC_DEMON) && hasob(cell->obpile, OT_PENTAGRAM)) {
		*error = E_PENTAGRAM;
		return B_FALSE;
	}


	// not attacking
	if (lfhasflag(lf, F_DOESNTMOVE) && !cell->lf) {
		*error = E_CANTMOVE;
		return B_FALSE;
	}

	return cellwalkable(lf, cell, error);
}


// effects which happen after player moves.
// IMPORTANT:  don't modify lf's flagpile during this code!
//	particularly don't remove flags...
// returns TRUE if we displayed a message
int moveeffects(lifeform_t *lf) {
	flag_t *f;
	int didmsg = B_FALSE;

	if (lfhasflagval(lf, F_INJURY, IJ_HAMSTRUNG, NA, NA, NULL)) {
		if (!skillcheck(lf, SC_FALL, 20, 0)) { 
			fall(lf, NULL, B_TRUE);
			if (isplayer(lf)) didmsg = B_TRUE;
		}
	}

	if (isbleeding(lf)) {
		if (hasbleedinginjury(lf, BP_LEGS)) {
			if (!bleedfrom(lf, BP_LEGS, B_FALSE)) {
				losehp(lf, 1, DT_DIRECT, NULL, "blood loss");
			}
		} else {
			if (rnd(1,2) == 1) {
				bleed(lf, B_FALSE);
			}
		}
	}

	f = lfhasflag(lf, F_PAIN);
	if (f) {
		if (!lfhasflag(lf, F_DRUNK)) {
			int dam;
			if (isplayer(lf)) {
				msg("Your body is wracked with pain!");
				didmsg = B_TRUE;
			} else if (cansee(player, lf)) {
				char lfname[BUFLEN];
				getlfname(lf, lfname);
				msg("%s convulses in pain!",lfname);
				didmsg = B_TRUE;
			}

			if (strlen(f->text)) {
				dam = roll(f->text);
			} else {
				dam = roll("1d2");
			}
			losehp(lf, dam, f->val[0], NULL, "extreme pain");
			if (isdead(lf)) return didmsg;
		}
	}


	return didmsg;
}


// returns TRUE if something happened
int movelf(lifeform_t *lf, cell_t *newcell) {
	object_t *o,*nexto;
	char obname[BUFLEN],lfname[BUFLEN],buf[BUFLEN];
	lifeform_t *l;
	int didmsg = B_FALSE;
	flag_t *f;
	int changedlev = B_FALSE;
	room_t *preroom = NULL, *postroom = NULL;
	int preshop = -1;
	int prespeed = B_FALSE, postspeed = B_FALSE;
	int prewater = B_FALSE;
	vault_t *v;

	assert(newcell);

	getlfname(lf, lfname);

	if (isplayer(lf) || cansee(player, lf)) {
		needredraw = B_TRUE;
	}

	if (newcell->map != lf->cell->map) {
		changedlev = B_TRUE;
		if (isplayer(lf)) {
			// remember the time which we exitted this map.
			lf->cell->map->lastplayervisit = curtime;
		}
	}

	// special effects when the player moves to a new map
	if (changedlev && isplayer(lf)) {
		object_t *o;
		long barrierid = -1;
		// mapentereffects will give all monster on the new map
		// a bunch of turns to simulate time passing while the player
		// was away.  to prevent them from blocking off the staircase cell 
		// where the player is about to arrive, place a magic barrier over it.
		o = addobfast(newcell->obpile, OT_MAGICBARRIER);
		if (o) barrierid = o->id;
		
		mapentereffects(newcell->map);

		// now remove the barrier
		o = hasobid(newcell->obpile, barrierid);
		if (o) killob(o);
	}

	//  remember current cell + room id
	prespeed = getmovespeed(lf);
	preroom = lf->cell->room;
	v = getcellvault(lf->cell);
	if (v && hasflag(v->flags, F_VAULTISSHOP)) {
		preshop = getroomid(lf->cell);
	}
	
	// getting out of water?
	if (hasobwithflag(lf->cell->obpile, F_DEEPWATER)) {
		prewater = B_TRUE;
	}

	// move out...
	lf->cell->lf = NULL;

	// if required, relink lifeform to new map
	if (newcell->map != lf->cell->map) {
		if (isplayer(lf)) {
			statdirty = B_TRUE;
		}
		relinklf(lf, newcell->map);
		if (isplayer(lf)) {
			// clear map to force redraw.
			wclear(gamewin);
		}
	}

	// remember previous cells
	lf->prevcell[1] = lf->prevcell[0];
	lf->prevcell[0] = lf->cell;

	// update lifeform
	lf->cell = newcell;

	// nothing should be in new cell..
	assert(!newcell->lf);

	// remember new room...
	postroom = lf->cell->room;
	postspeed = getmovespeed(lf);

	// update new cell
	newcell->lf = lf;

	// update light
	if ((isplayer(lf) && changedlev) || lfproduceslight(lf)) {
		calclight(lf->cell->map);
	}
	setlosdirty(lf); 
	//precalclos(lf);

	if (isplayer(lf) || cansee(player, lf)) {
		needredraw = B_TRUE;
	}

	didmsg = moveeffects(lf);

	killflagsofid(lf->flags, F_HIDING);

	// remove grabs (but not attached things)
	// Note: only remove this from the person _being grabbed_.
	// if the grabb_er_ moves away, they'll drag the grabee with them.
	f = lfhasflag(lf, F_GRABBEDBY);
	if (f) {
		lifeform_t *grabber;
		grabber = findlf(NULL, f->val[0]);
		assert(grabber);
		if (getcelldist(lf->cell, grabber->cell) > 1) {
			killflagsofid(grabber->flags, F_GRABBING);
			killflagsofid(lf->flags, F_GRABBEDBY);
		}
	}

	// passwall ends when you walk onto a non-solid cell.
	f = lfhasflag(lf, F_NONCORPOREAL);
	if (f && (f->obfrom == OT_S_PASSWALL)) {
		enum ERROR err;
		cellwalkable(lf, lf->cell, &err);
		if (err == E_OK) {
			stopspell(lf, OT_S_PASSWALL);
			killflag(f);
			if (isplayer(lf)) {
				didmsg = B_TRUE;
			}
		}
	}


	if (isplayer(lf)) {
		if (prewater && !hasobwithflag(newcell->obpile, F_DEEPWATER)) {
			// getitng out of water?
			statdirty = B_TRUE;
		}
	}

	// check ground objects
	if (!isairborne(lf)) {
		for (o = newcell->obpile->first ; o ; o = nexto ) {
			nexto = o->next;

			f = hasflag(o->flags, F_DEEPWATER);
			if (f) {
				if (checkfordrowning(lf, o)) {
					didmsg = B_TRUE;
					if (isdead(lf)) return B_TRUE;
				}
				// did you just enter the water?
				if (!prewater) {
					if ((getobdepth(o, lf) >= DP_WAIST) && getskill(lf, SK_SWIMMING)) {
						if (isplayer(lf)) {
							msg("You start swimming.");
							didmsg = B_TRUE;
							statdirty = B_TRUE;
						} else if (cansee(player, lf)) {
							msg("%s starts swimming.", lfname);
							didmsg = B_TRUE;
						}
						// put out fires
						extinguishlf(lf);
						
						// stop sprinting
						stopsprinting(lf);
					}
				}
			}

			f = hasflag(o->flags, F_SHARP);
			if (f && hasbp(lf, BP_FEET) && !lfhasflag(lf, F_SNEAK)) {
				object_t *boots;
				// has boots on?
				boots = getequippedob(lf->pack, BP_FEET);
				if (!boots) {
					// take damage
					getobname(o, obname, 1);
					if (isplayer(lf)) {
						msg("Ow - you step on %s!",obname);
						didmsg = B_TRUE;
					} else if (haslos(player, newcell)) {
						msg("%s steps on %s!",lfname, obname);
						didmsg = B_TRUE;
					}
					snprintf(buf, BUFLEN, "stepping on %s", obname);
					losehp(lf, rnd(f->val[0],f->val[1]), DT_SLASH, NULL, buf);
				}
			}

			f = hasflag(o->flags, F_CRUSHABLE);
			if (f && !lfhasflag(lf, F_SNEAK)) {
				enum LFSIZE crushsize;
				crushsize = f->val[0];

				if (getlfsize(lf) >= crushsize) {
					// crunch it broken glass
					getobname(o, obname, 1);
					
					// special case
					if (o->type->id == OT_BROKENGLASS) {
						if (o->amt > 1) {
							char *newname;
							// we want 'xx steps on some pieces of broken glass'
							//     not 'xx steps on 5 pieces of broken glass'
							newname = makeplural(obname);
							newname = strrep(newname, "a ", "some ", NULL);
							strcpy(obname, newname);
							free(newname);
						}
					}

					if (isplayer(lf)) {
						msg("You crush %s underfoot.",obname);
						didmsg = B_TRUE;
					} else if (haslos(player, newcell)) {
						msg("%s crushes %s.",lfname, obname);
						didmsg = B_TRUE;
					}
					// kill object which is being crushed.
					removeob(o, o->amt);
					continue;
				} 
			} // end if crushable

			if ((o->type->id == OT_VINE) && !hasjob(lf, J_DRUID)) {
				char obname[BUFLEN];
				getobname(o,obname,o->amt);
				if (isplayer(lf)) {
					msg("%s grab%s you!",obname,(o->amt == 1) ? "s" : "");
				} else if (cansee(player, lf)) {
					msg("%s grab%s %s!",obname, (o->amt == 1) ? "s" : "", lfname);
				}
			}
		} // end foreach object in cell
	} // end if !flying

	// update where player knows
	// (but without a map you will then slowly forget it)
	if (isplayer(lf)) {
		updateknowncells();

		// TODO: not sure about this next bit yet...
		//    it definitely won't work for non-square rooms
		//    or rooms with pillars.  would be better to fix
		//    haslos() code to handle looking along walls 
		//    instead.
		// if you walked into a new fully lit room, which
		// ISNT a vault, reveal it.
		//

		/* 
		if ((getskill(lf, SK_CARTOGRAPHY) >= PR_NOVICE) && (!lf->cell->vault)) {
			if ((postroom > 0) && (postroom != preroom)) {
				cell_t *c[MAX_MAPW*MAX_MAPH];
				int ncells;
				int i,alllit = B_TRUE,allknown = B_TRUE;

				// is the whole room lit?
				getroomcells(lf->cell->map, postroom, c, &ncells);
				for (i = 0; i < ncells; i++) {
					if (!islit(c[i])) {
						alllit = B_FALSE;
					}
					if (!c[i]->known) {
						allknown = B_FALSE;
					}
				}	

				if (alllit && !allknown) {
					// make the all known
					for (i = 0; i < ncells; i++) {
						setcellknown(c[i], B_FALSE);
					}	
				}
				
			}
		}
		*/
	} 

	if (gamemode == GM_GAMESTARTED) {
		if (isplayer(lf) && !isblind(lf)) {
			// see the vault
			if (!preroom && postroom && postroom->vault) {	
				f = hasflag(postroom->vault->flags, F_VAULTENTERTEXT);
				if (f) {
					msg("%s", f->text);
					didmsg = B_TRUE;
				}
			}
		}

		// does anyone else see you?
		for (l = newcell->map->lf ; l ; l = l->next) {
			if (l != lf) {
				flag_t *alarm;
				//if (haslos(l, newcell)) {
				if (cansee(l, lf)) {
					int dointerrupt = B_FALSE;

					// much larger creatures moving will cause our los to be recalculated
					if (getlfsize(lf) - getlfsize(l) >= 2) {
						setlosdirty(l); 
						//precalclos(l);
					}

					if (isplayer(l)) {
						if (areenemies(lf, l)) {
							if (lfhasflag(l, F_RUNNING) || lfhasflag(l, F_TRAINING)) {
								// TODO: also check for isresting(l), if we have allies standing watch
								getlfnamea(lf, lfname);
								msg("%s comes into view.", lfname);
							}
							dointerrupt = B_TRUE;
						}
					} else if (isplayer(lf)) {
						if (areallies(lf, l)) {
							// remember player's last known loc
							f = lfhasflag(l, F_PETOF);
							if (f) {
								f->val[1] = player->cell->x;
								f->val[2] = player->cell->y;
							}
						}
						//dointerrupt = B_TRUE;
					}
					if (dointerrupt) {
						interrupt(l);
					}
				} 
				
				alarm = hasactivespell(l, OT_S_ALARM);
				if (alarm && areenemies(lf, l) && haslof(lf->cell, l->cell, LOF_WALLSTOP, NULL) ) {
					// in range of alarm? range is 3 * spell power cells.
					if (getcelldist(lf->cell, l->cell) <= (alarm->val[2]*3)) {
						// alarm goes off
						noise(l->cell, NULL, NC_OTHER, 50, "a blaring siren!", NULL);
						killflag(alarm);
					}
				}
			}
		}

		// leaving a shop
		if (preshop) {
			// are you about to go outside a shop with stolen goods?
			if ((getroomid(lf->cell) == preshop) && (lf->cell->type->id != CT_FLOORSHOP)) {
				lifeform_t *shk;
				int nitems = 0;
				shk = findshopkeeper(lf->cell->map, preshop);
				// do you have any unpaid items from that shop?
				if (shk && getowing(lf, preshop, &nitems)) {
					// warning...
					sayphrase(shk, SP_PAYWARN, SV_SHOUT, NA,  (nitems == 1) ? "that" : "those" );
					didmsg = B_TRUE;
				}
			} else if (getroomid(lf->cell) != preshop) {
				// you've left the shop
				lifeform_t *shk;
				shk = findshopkeeper(lf->cell->map, preshop);
				if (shk && getowing(lf, preshop, NULL)) {
					// call the guards
					sayphrase(shk, SP_PAYTHREAT, SV_ROAR, NA, NULL);
					didmsg = B_TRUE;
					fightback(shk, lf); // shopkeeper attacks
					callguards(shk, lf); // guards come running
				}
			}
		}
	}

	// status bar
	if ((prespeed != postspeed) && isplayer(lf)) {
		statdirty = B_TRUE;
	}

	return didmsg;
}

int movelfsoutofway(cell_t *newcell) {
	// anyone in the way?
	if (newcell->lf) {
		cell_t *c;
		// if they are, find somewhere to move them.
		c = getrandomadjcell(newcell, WE_WALKABLE, B_ALLOWEXPAND); 
		if (c) {
			// move them there
			movelf(newcell->lf, c);
		} else {
			return B_TRUE;
		}
	}
	return B_FALSE;
}

// basically this is a warpper for 'movelf' which
// does other game things like telling the player
// what is here.
int moveto(lifeform_t *lf, cell_t *newcell, int onpurpose, int dontclearmsg) {
	object_t *o;
	char lfname[BUFLEN];
	int didmsg;
	int predark = B_FALSE,postdark = B_FALSE;

	// for the player, moving means that we don't regenerate stamina.
	// this is the equivilant of losing the same amount of stamina which we 
	// would regenerate, only it avoids constantly redrawing the status
	// bar every single move.
	if (isplayer(lf)) addflag(lf->flags, F_MOVED, B_TRUE, NA, NA, NULL);

	if (!onpurpose || !isplayer(lf)) {
		dontclearmsg = B_TRUE;
	}

	assert(!newcell->lf);

	getlfname(lf, lfname);

	// is current cell dark?
	if (isplayer(lf)) {
		if (!haslos(lf, lf->cell) && !isblind(lf)) {
			predark = B_TRUE;
		}
	}

	if (lfhasflag(lf, F_HIDING)) {
		dontclearmsg = B_TRUE;
	}
	// actually do the move
	didmsg = movelf(lf, newcell);

	if (isplayer(lf)) {
		// is new cell dark?
		if (!haslos(lf, lf->cell) && !isblind(lf)) {
			postdark = B_TRUE;
		} else {
			killflagsofid(lf->flags, F_DONEDARKMSG);
		}

		// just moved into a dark area - announce it.
		if (postdark && !predark && !lfhasflag(lf, F_DONEDARKMSG)) {
			msg("It is %s!", (lf->cell->lit == L_PERMDARK) ? "unnaturally dark" : "pitch black");
			addflag(lf->flags, F_DONEDARKMSG, B_TRUE, NA, NA, NULL);
			dontclearmsg = B_TRUE;
		} 
	}

	if (dontclearmsg) {
		didmsg = B_TRUE;
	}

	// tell player about things
	if (!isdead(lf)) {
		// some lifeforms can go through things
		if (getlfmaterial(lf) == MT_GAS) {
			char obname[BUFLEN];
			for (o = newcell->obpile->first ; o ; o = o->next) {
				if (isimpassableob(o, lf) && !hasflag(o->flags, F_REALLYIMPASSABLE)) {
					getobname(o, obname, o->amt);
					if (isplayer(lf)) {
						msg("You seep around %s.",  obname);
					} else if (haslos(player, newcell)) {
						msg("%s seeps around %s.", lfname, obname);
					}
				}
			}
		} else if (getlfmaterial(lf) == MT_SLIME) {
			char obname[BUFLEN];
			for (o = newcell->obpile->first ; o ; o = o->next) {
				if (isimpassableob(o, lf)) {
					getobname(o, obname, o->amt);
					if (isplayer(lf)) {
						msg("You seep under %s.",  obname);
					} else if (haslos(player, newcell)) {
						msg("%s seeps under %s.", lfname, obname);
					}
				}
			}
		}

		if (isplayer(lf)) {
			// see/feel objects on ground
			int numobs;
			numobs = countnoncosmeticobs(newcell->obpile, B_TRUE);
			if ((numobs == 0) && !newcell->writing) {
				// just clear the message buffer
				if (!didmsg) clearmsg();
			} else { // tell player what is here
				if (onpurpose) {
					dolook(newcell, B_FALSE);
				}
			}
		}
	}


	// make some noise
	// (stealth check to avoid this)
	if (!skillcheck(lf, SC_STEALTH, 20, 0)) {
		if (isairborne(lf)) {
			makenoise(lf, N_FLY);
		} else {
			makenoise(lf, N_WALK);
		}
	}

	// slip on blood in new cell?
	if (!isairborne(lf) && !isswimming(lf)) {
		int slip;
		object_t *o,*nexto;
		object_t *slipob;

		if (!lfhasflag(lf, F_SNEAK)) {
			slip = getslipperyness(newcell, &slipob);
			if (slip && !skillcheck(lf, SC_SLIP, slip, 0)) {
				slipon(lf, slipob);
			} 
		}

		// activate traps
		for (o = newcell->obpile->first ; o ; o = nexto ) {
			nexto = o->next;
			if (hasflag(o->flags, F_TRAP)) {
				triggertrap(lf, NULL, o, lf->cell);
				interrupt(lf);
			}
		}
	}

	return B_FALSE;
}

// dirtype etermines whether to use compass or orthogonal direction to 
// measure distance when determining which way is "towards"
//
// in general: 
//   use orthogonal/dt_orth for voluntary movement (eg. monster moving
//      towards player), compass 
//
//   use compass/dt_compass for involuntary movement (eg. being knocked back by
//      an explosion)
//
int movetowards(lifeform_t *lf, cell_t *dst, int dirtype, int strafe) {
	int dir;
	int rv = B_TRUE;

	int db = B_FALSE;

	if (lfhasflag(lf, F_DEBUG)) db = B_TRUE;

	if (isblind(lf)) {
		if (db) dblog(".oO { i am blind - movetorwards calling dorandommove. }");
		dorandommove(lf, B_TRUE, B_TRUE);
		return B_FALSE;
	}

	// move towards them
	dir = getdirtowards(lf->cell, dst, lf, B_TRUE, dirtype);
	if (dir != D_NONE) {
		if (db) {
			dblog(".oO { dir from %d,%d -> %d,%d is %s }", lf->cell->x, lf->cell->y, dst->x, dst->y, getdirname(dir));
		}
		rv = trymove(lf, dir, B_TRUE, strafe);
	} else {
		if (db) dblog(".oO { dir from %d,%d -> %d,%d is DT_NONE ! }", lf->cell->x, lf->cell->y, dst->x, dst->y);
	}
	return rv;
}

int move_will_hurt(lifeform_t *lf) {
	flag_t *retflag[MAXCANDIDATES];
	int nretflags,i;
	
	getflags(lf->flags, retflag, &nretflags, F_INJURY, F_PAIN, F_NONE);
	for (i = 0; i < nretflags; i++) {
		flag_t *f;
		f = retflag[i];
		if (f->id == F_PAIN) return B_TRUE;
		if (f->id == F_INJURY) {
			switch (f->val[0]) {
				case IJ_LEGBLEED:
					return B_TRUE;
				default:	
					break;
			}
		}
	}

	if (hasbleedinginjury(lf, BP_LEGS)) {
		return B_TRUE;
	}
	return B_FALSE;
}

int opendoorat(lifeform_t *lf, cell_t *c) {
	object_t *o;
	int rv;
	o = hasobwithflag(c->obpile, F_DOOR);
	if (o) {
		rv = opendoor(lf, o);
	} else {
		rv = B_TRUE;
	}
	return rv;
}

int opendoor(lifeform_t *lf, object_t *o) {
	cell_t *doorcell;
	char buf[BUFLEN];
	char obname[BUFLEN];
	flag_t *f;

	doorcell = o->pile->where;
	assert(doorcell);

	getobname(o, obname, 1);

	if (!isdoor(o, NULL)) {
		return B_TRUE;
	}

	if (!canopendoors(lf)) {
		if (isplayer(lf)) {
			msg("You have no hands with which to open the door!");
		}
		return B_TRUE;
	}

	f = hasflag(o->flags, F_OPEN);
	if (f) {
		if (lf && isplayer(lf)) {
			msg("It is already open!");
		}
		return B_TRUE;
	} else {
		if (lf) {
			if (isplayer(lf)) {
				int dir;
				cell_t *pastdoorcell;
				// has known trap?
				if (hasflagval(o->flags, F_TRAPPED, NA, NA, B_TRUE, NULL)) {
					if (getattrbracket(getattr(lf, A_WIS), A_WIS, NULL) >= AT_AVERAGE) {
						char ch;
						snprintf(buf, BUFLEN,"Really open %s?", obname);
						ch = askchar(buf,"yn","n", B_TRUE, B_FALSE);
						if (ch != 'y') {
							msg("Cancelled.");
							return B_TRUE;
						}
					}
				}
				// hear water behind it?
				dir = getdirtowards(doorcell, lf->cell, NULL, B_FALSE, DT_ORTH);
				pastdoorcell = getcellindir(doorcell, dir);
				if (pastdoorcell && getcellwaterdepth(pastdoorcell, NULL)) {
					if (getskill(lf, SK_LISTEN) || haslos(lf, pastdoorcell)) {
						if (getattrbracket(getattr(lf, A_WIS), A_WIS, NULL) >= AT_AVERAGE) {
							char ch;
							snprintf(buf, BUFLEN,"%s running water behind %s.  Really open it?", 
								haslos(lf, pastdoorcell) ? "There is" : "You can hear", obname);
							ch = askchar(buf,"yn","n", B_TRUE, B_FALSE);
							if (ch != 'y') {
								msg("Cancelled.");
								return B_TRUE;
							}
						}
					}
				}
			}

			taketime(lf, getactspeed(lf));
			touch(lf, o);

			// stop sprinting
			stopsprinting(lf);
		}

		// trapped?
		if (lf && hasflag(o->flags, F_TRAPPED)) {
			if (doobtraps(o, lf)) {
				return B_TRUE;
			}
		} 
		// locked?
		if (hasflag(o->flags, F_LOCKED)) {
			if (lf && isplayer(lf)) {
				msg("The %s is locked.", noprefix(obname));
			}
			return B_TRUE;
		} else {
			int openit = B_TRUE;
			f = hasflag(o->flags, F_JAMMED);
			if (f) {
				int amt;
				amt = getattr(lf, A_STR) - 10;
				if (amt < 0) amt = 0;
					
				if (lf && isplayer(lf)) {
					if (amt > 0) {
						msg("The %s moves slightly but seems jammed.", noprefix(obname));
					} else {
						msg("The %s is jammed.", noprefix(obname));
					}
				}
				// loosen a bit
				if (amt) {
					f->val[0] -= amt;
					if (f->val[0] <= 0) {
						killflag(f);	
					}
				}
				openit = B_FALSE; // don't open the door
			}
			if (openit) {
				cell_t *where;
				// open it
				addflag(o->flags, F_OPEN, B_TRUE, NA, NA, NULL);

				killflagsofid(o->flags, F_IMPASSABLE);
				killflagsofid(o->flags, F_BLOCKSVIEW);
				killflagsofid(o->flags, F_SECRET);
				killflagsofid(o->flags, F_TRAPPED);

				if (lf) {
					if (isplayer(lf)) {
						msg("You open %s.",obname);
					} else {
						if (cansee(player, lf) && isadjacent(lf->cell, doorcell)) {
							getlfname(lf, buf);
							capitalise(buf);
							msg("%s opens %s.",buf, obname);
						} else if (haslos(player, doorcell)) {
							capitalise(obname);
							msg("%s opens.",obname);
						}
					}

				}
				where = getoblocation(o);

				if (player) {
					if (haslos(player, where)) {
						needredraw = B_TRUE;
						drawscreen();
					} else {
						// don't anonuce this if we can see it.
						// normally 'noise()' takes care of this by
						// checking if we have LOS to the lifeform making
						// sound, but in this case it's the door making
						// the sound, not the lf.
						noise(where, NULL, NC_OTHER, 2, "a door opening.", NULL);
					}
				}
			}
			return B_FALSE;
		}
	}

	return B_FALSE;
}

int closedoorat(lifeform_t *lf, cell_t *c) {
	object_t *o;
	int rv;
	o = hasobwithflag(c->obpile, F_DOOR);
	if (o) {
		rv = closedoor(lf, o);
	} else {
		rv = B_TRUE;
	}
	return rv;
}

int closedoor(lifeform_t *lf, object_t *o) {
	cell_t *cell;
	char buf[BUFLEN];
	char obname[BUFLEN];
	object_t *oo;
	flag_t *f;

	cell = getoblocation(o);

	getobname(o, obname, 1);

	if (!isdoor(o, NULL)) {
		if (isplayer(lf)) {
			msg("There is nothing to close there!");
		}
		return B_TRUE;
	}

	if (lf && lfhasflagval(lf, F_NOBODYPART, BP_HANDS, NA, NA, NULL)) {
		if (isplayer(lf)) {
			msg("You have no hands with which to close the door!");
		}
		return B_TRUE;
	}

	if (cell->lf) {
		if (lf && isplayer(lf)) {
			char inwayname[BUFLEN];
			getlfname(cell->lf, inwayname);
			msg("%s is in the way!", haslos(lf, cell) ? inwayname : "Something");
		}
		return B_TRUE;
	}

	// any solid object other than the door?
	for (oo = cell->obpile->first ; oo ; oo = oo->next) {
		if ((oo != o) && (getmaterialstate(oo->material->id) == MS_SOLID)) {
			if (lf && isplayer(lf)) {
				char inwayname[BUFLEN];
				getobname(oo, inwayname, oo->amt);
				msg("%s %s in the way!", haslos(lf, cell) ? inwayname : "Something",
					(haslos(lf,cell) && (oo->amt > 1)) ? "are" : "is" );
			}
			return B_TRUE;
		}
	}

	f = hasflag(o->flags, F_OPEN);
	if (!f) {
		if (lf && (isplayer(lf))) {
			msg("It is already closed!");
		}
		return B_TRUE;
	} else {
		// close it
		killflag(f);
		f = hasflag(o->flags, F_DOOR);
		addflag(o->flags, F_IMPASSABLE, f->val[0], f->val[1], f->val[2], f->text);

		addflag(o->flags, F_BLOCKSVIEW, B_TRUE, NA, NA, NULL);

		if (lf) {
			// stop sprinting
			stopsprinting(lf);

			if (isplayer(lf)) {
				msg("You close %s.", obname);
			} else {
				if (cansee(player, lf) && isadjacent(lf->cell, cell)) {
					getlfname(lf, buf);
					capitalise(buf);
					msg("%s closes %s.",buf, obname);
				} else if (haslos(player, cell)) {
					capitalise(obname);
					msg("%s closes.",obname);
				}
			}
			taketime(lf, getactspeed(lf));
			touch(lf, o);
		}
		if (player && haslos(player, cell)) {
			needredraw = B_TRUE;
			drawscreen();
		}
	}

	return B_FALSE;
}

int tryrun(lifeform_t *lf, int dir) {
	int willrun = B_TRUE,rv;
	if (!moveclear(lf, dir, NULL)) {
		// don't double move into monsters, etc
		willrun = B_FALSE;
	}
	rv = trymove(lf, dir, B_TRUE, B_TRUE);
	if (!rv && willrun) {
		// successful move
		addflag(lf->flags, F_RUNNING, dir, B_FALSE, NA, NULL);
	}
	return rv;
}

int trysneak(lifeform_t *lf, int dir) {
	if (dir == D_NONE) {
		if (isplayer(lf)) { 
			char ques[BUFLEN];
			char ch;
			snprintf(ques, BUFLEN, "Carefully %s in which direction (- to cancel)", getmoveverb(lf));
			ch = askchar(ques, "yuhjklbn.-","-", B_FALSE, B_TRUE);	
			dir = chartodir(ch);
			if (dir == D_NONE) return B_TRUE;
		} else {
			return B_TRUE;
		}
	}
	addflag(lf->flags, F_SNEAK, NA, NA, NA, NULL);
	trymove(lf, dir, B_TRUE, B_FALSE);
	killflagsofid(lf->flags, F_SNEAK);
	
	return B_FALSE;
}

// try to pull lifeform towards cell c (or next to it)
int pullnextto(lifeform_t *lf, cell_t *c) {
	int dir;
	cell_t *dst = NULL;
	cell_t *newdst = NULL;

	dst = c;

	while (dst->lf) {
		dir = getdirtowards(dst, lf->cell, lf, B_FALSE, DT_COMPASS);
		if (dir == D_NONE) {
			return B_TRUE;
		} else {
			dst = getcellindir(dst, dir);
			if (dst == lf->cell) {
				return B_TRUE;
			}
		}
	} 
	// is the path clear?
	if (!dst) {
		return B_TRUE;
	}

	 if (!haslof(lf->cell, dst, B_FALSE, &newdst)) {
		if (newdst) {
			// update destination
			dst = newdst;
		} else {
			return B_TRUE;
		}
	}

	if (isplayer(lf) || cansee(player, lf)) {
		char buf[BUFLEN];
		getlfname(lf, buf);
		msg("%s %s pulled %s!", buf, is(lf),
			isairborne(lf) ? "through the air" :
			"along the ground");
	}
	movelf(lf, dst);
	return B_FALSE;
}


// do pre-move checks like slipping on stuff in your current cell,
// webs, etc.
//   cell can be null if you're using stairs.

// return true if something happened
int initiatemove(lifeform_t *lf, cell_t *cell, int *didmsg) {
	object_t *o, *nexto;
	char buf[BUFLEN];
	flag_t *f;
	int attacking = B_FALSE;

	if (cell && cell->lf && !canswapwith(lf, cell->lf)) attacking = B_TRUE;

	// too tired? (if we're attacking, leave the 'too tired' message to
	// the attack code)
	if (!attacking && !getstamina(lf)) {
		if (isplayer(lf)) {
			msg("You are too tired to move!");
		} else {
			// this doesn't count as an action for the player, but it
			// does for monsters
			taketime(lf, getmovespeed(lf));
		}
		reason = E_OK;
		return B_TRUE;
	}

	// checks which only happen if we're MOVING (ie not attacking)
	// demon in pentagram
	if ((getraceclass(lf) == RC_DEMON) && hasob(lf->cell->obpile, OT_PENTAGRAM)) {
		if (isplayer(lf)) {
			msg("You cannot escape the pentagram!");
		} else if (cansee(player, lf)) {
			char lfname[BUFLEN];
			getlfname(lf, lfname);
			msg("%s struggles within a pentagram!", lfname);
		}
		reason = E_OK;
		taketime(lf, getmovespeed(lf));
		return B_TRUE;
	}

	// gravboosted
	if (!attacking) {
		if (lfhasflag(lf, F_GRAVBOOSTED)) {
			// make a saving throw to move
			if (skillcheck(lf, SC_STR, 25, 0)) {
				if (isplayer(lf)) {
					msg("You manage to %s despite the strong gravity.", isprone(lf) ? "stand" : "move");
					if (didmsg) *didmsg = B_TRUE;
				}
			} else {
				if (isplayer(lf)) {
					msg("You try to %s but are unable to %s!", 
						isprone(lf) ? "stand" : "move",
						isprone(lf) ? "lift your arms" : "lift your feet");
					if (didmsg) *didmsg = B_TRUE;
				} else if (cansee(player, lf)) {
					char lfname[BUFLEN];
					getlfname(lf, lfname);
					msg("%s tries to %s but is unable to %s!", lfname,
						isprone(lf) ? "stand" : "move",
						isprone(lf) ? "get up" : "lift its feet");
					if (didmsg) *didmsg = B_TRUE;
				}
				reason = E_OK;
				taketime(lf, getmovespeed(lf));
				return B_TRUE;
			}
		}

		// sticky objects in current cell?
		for (o = lf->cell->obpile->first ; o ; o = nexto) {
			nexto = o->next;

			f = obrestrictsmovement(o, lf);
			if (f) {
				char lfname[BUFLEN];
				int diff;
				int checkmod = 0;
				int getsweaker;

				if ((o->type->id == OT_WEB) && isairborne(lf)) {
					checkmod -= 5;
				}
				
				getlfname(lf,lfname);
				getobname(o, buf, o->amt);

				// for stacks of sticky objects, each one after the first adds
				// quarter its difficuly.  ie:
				// 1 x object with f_sticky:20, difficult is 20
				// 2 x object with f_sticky:20, difficult is 25
				// 3 x object with f_sticky:20, difficult is 30
				// etc
				// can you break free?
				diff = f->val[0];
				if (o->amt > 1) {
					diff = (o->amt - 1) * ((float)f->val[0] / 4.0);
				}
				getsweaker = f->val[1];
				if (skillcheck(lf, SC_STR, diff, checkmod)) {
					if (isplayer(lf)) {
						msg("You tear free from %s!", buf);
						if (didmsg) *didmsg = B_TRUE;
					} else if (cansee(player, lf)) {
						msg("%s tears free from %s!", lfname, buf);
						if (didmsg) *didmsg = B_TRUE;
					}
					killob(o);
					continue;
				} else {
					// failed - object gets a little less sticky
					if (isplayer(lf)) {
						msg("You struggle in %s!", buf);
						if (didmsg) *didmsg = B_TRUE;
					} else if (cansee(player, lf)) {
						msg("%s struggles in %s!", lfname, buf);
						if (didmsg) *didmsg = B_TRUE;
					}

					if (getsweaker) {
						takedamage(o, 1, DT_DIRECT);
					}

					taketime(lf, getmovespeed(lf));
					
					reason = E_OK;
					return B_TRUE;	
				}
			}
		}
	}

	// are we on the ground?
	if (isprone(lf) && (!isplayer(lf) || !attacking)) {
		int willstand = B_FALSE;
		if (isplayer(lf)) {
			if (!attacking) {
				// player can attack from the ground
				willstand = B_TRUE;
			}
		} else {
			// monsters always stand up
			willstand = B_TRUE;
		}
		
		if (willstand) {
			if (isplayer(lf)) {
				msg("You stand up.");
			} else if (cansee(player, lf)) {
				char lfname[BUFLEN];
				getlfname(lf, lfname);
				msg("%s stands up.",lfname);
			}
			killflagsofid(lf->flags, F_PRONE);
			killflagsofid(lf->flags, F_FEIGNINGDEATH);
			
			reason = E_OK;

			// monsters don't take time to stand up if they were feigning death!
			if (!isplayer(lf) && lfhasflag(lf, F_FEIGNINGDEATH)) {
				return B_FALSE;
			} else {
				int howlong;
				float quartermax;
				int units;
				// time to get up depends on armour
				// 1*movespeed for every 1/4 of maxcarryweight being worn.
				quartermax = getmaxcarryweight(lf) / 4;
				units = (getequippedweight(lf) / quartermax)+1;
				howlong = getmovespeed(lf)*units;
				taketime(lf, howlong);
			}
			return B_TRUE;
		}
	}


	// slipping on something before moving?
	if (!attacking) {
		if (!isairborne(lf)) {
			int slip;
			object_t *slipob;

			if (!lfhasflag(lf, F_SNEAK)) {
				slip = getslipperyness(lf->cell, &slipob);
				if (slip && !skillcheck(lf, SC_SLIP, slip, 0)) {
					if (!slipon(lf, slipob)) {
						if (didmsg) *didmsg = B_TRUE;
						// don't move
						reason = E_OK;
						return B_TRUE;
					}
				} 
			}
		}

		// check for cursed objects in new cell + animals
		// do this AFTER checking if we will move, so that
		// they will actually try the move and fail (this lets
		// the player find out about the cursed object).
		//
		// note however that if a monster is chasing a player (ie
		// has F_TARGET,player) then they will simply avoid the cursed
		// object rather than failing the movement. 
		if (cell) {
			for (o = cell->obpile->first ; o ; o = nexto) {
				nexto = o->next;
				if (!isplayer(lf)) {
					if ((o->blessed == B_CURSED) && (getraceclass(lf) == RC_ANIMAL) && !isairborne(lf)) {
						if (cansee(player, lf)) {
							char lfname[BUFLEN];
							getlfname(lf,lfname);
							getobname(o, buf, o->amt);
							msg("%s %s away from %s!", lfname, isplayer(lf) ? "shy" : "shies", buf);
							o->blessknown = B_TRUE;
							if (didmsg) *didmsg = B_TRUE;
						}
						taketime(lf, getmovespeed(lf));
						reason = E_OK;
						// avoid this object in future
						snprintf(buf, BUFLEN, "%ld",o->id);
						addflag(lf->flags, F_AVOIDOB, B_CURSED, NA, NA, buf);
						return B_TRUE;	
					} else if (lfhasflagval(lf, F_AVOIDOBTYPE, o->type->id, NA, NA, NULL)) {
						if (cansee(player, lf)) {
							char lfname[BUFLEN];
							getlfname(lf,lfname);
							getobname(o, buf, o->amt);
							msg("%s %s away from %s!", lfname, isplayer(lf) ? "shy" : "shies", buf);
							o->blessknown = B_TRUE;
							if (didmsg) *didmsg = B_TRUE;
						}
						taketime(lf, getmovespeed(lf));
						reason = E_OK;
						// avoid this object in future
						snprintf(buf, BUFLEN, "%ld",o->id);
						addflag(lf->flags, F_AVOIDOB, NA, NA, NA, buf);
						return B_TRUE;	
					}
				}
			}
		}
	}
	return B_FALSE;
}

void swapplaces(lifeform_t *lf1, lifeform_t *lf2, int changedir, int onpurpose) {
	cell_t *cell1,*cell2;

	cell1 = lf1->cell;
	cell2 = lf2->cell;

	// make lf who is there vanish temporarily...
	cell2->lf = NULL;
	lf2->cell = NULL;

	// move you..
	moveto(lf1, cell2, onpurpose, B_FALSE);

	// move them...
	lf2->cell = cell1;
	cell1->lf = lf2;

	if (changedir) {
		int tempfacing;
		tempfacing = lf2->facing;
		setfacing(lf2, lf1->facing);
		setfacing(lf1, tempfacing);
	}

	// remember that we just swapped, and this counts as a move
	if (!isplayer(lf1)) {
		addflag(lf1->flags, F_NOSWAP, B_TRUE, NA, NA, NULL);
		if (isplayer(lf1)) addflag(lf1->flags, F_MOVED, B_TRUE, NA, NA, NULL);
	}
}

// teleport somewhere, along with puffs of smoke etc
int teleportto(lifeform_t *lf, cell_t *c, int wantsmoke) {
	char buf[BUFLEN];

	// can't teleport on top of something else
	if (c->lf) {
		// go somewhere nearby
		c = getrandomadjcell(c, WE_WALKABLE, B_ALLOWEXPAND);
		if (!c) {
			if (isplayer(lf)) {
				msg("You feel a wrenching sensation.");
			}
			return B_TRUE;
		}
	}

	if (!isplayer(lf) && cansee(player, lf)) {
		getlfname(lf, buf);
		if (wantsmoke) {
			msg("%s disappears in a cloud of smoke!", buf);
		} else {
			msg("%s vanishes!", buf);
		}
	}
	if (wantsmoke) {
		addob(lf->cell->obpile, "cloud of smoke");
	}
	movelf(lf, c);

	if (cansee(player, lf)) {
		redraw(); // redraw screen
	}

	if (isplayer(lf)) {
		msg("Suddenly, your surroundings appear different!");
	} else if (cansee(player, lf)) {
		getlfname(lf, buf);
		msg("%s appears!", buf);
	}
	// show any objects here, just like if we moved.
	// BUT don't let dolook() clear the msg bar if there are
	// no objects here.
	if (isplayer(lf) && countnoncosmeticobs(lf->cell->obpile, B_TRUE)) {
		dolook(lf->cell, B_FALSE);
	}
	return B_FALSE;
}

void triggertrap(lifeform_t *lf, object_t *o, object_t *trapob, cell_t *where) {
	char triggerer[BUFLEN];
	char trapname[BUFLEN];
	int wants;
	getobname(trapob, trapname, 1);
	if (lf) {
		getlfname(lf, triggerer);
		if (isplayer(lf)) wants = B_FALSE;
			else wants = B_TRUE;
	} else {
		getobname(o, triggerer, o->amt);
		if (o->amt == 1) wants = B_TRUE;
			else wants = B_FALSE;
	}
	if (haslos(player, where)) {
		msg("%s trigger%s %s!", triggerer, (wants) ? "s" : "", trapname);
		if (lf && isplayer(lf)) more();

		// no longer hidden
		killflagsofid(trapob->flags, F_SECRET);
	}
	// NOTE: after trapeffects(), oo might be killed.
	trapeffects(trapob, trapob->type->id, where);
	if (lf) interrupt(lf);
}

int trymove(lifeform_t *lf, int dir, int onpurpose, int strafe) {
	cell_t *cell;
	enum ERROR errcode;
	char buf[BUFLEN];
	int dontclearmsg = B_FALSE;
	int moveok;
	int rndmove = B_FALSE;
	int howlong;
	int reldir;
	int srcmoney = 0;
	flag_t *f;

	howlong = getmovespeed(lf);

	reldir = getrelativedir(lf, dir);


	if (onpurpose) {
		if (isplayer(lf)) {
			srcmoney = countmoney(lf->cell->obpile);
		}
		if ((reldir != RD_FORWARDS) && !lfhasflag(lf, F_AWARENESS)) {
			// if the given dir is behind us, just turn.
			if (!strafe) {
				setfacing(lf, dir);
				taketime(lf, getturnspeed(lf));
				return B_FALSE;
			} else {
				// player can't strafe while stuck.
				if (isstuck(lf) && isplayer(lf)) {
					msg("You can't move %s while stuck!", (reldir == RD_BACKWARDS) ? "backwards" : "sideways");
					return B_TRUE;
				}
			}
		}
	}


	f = lfhasflag(lf, F_DRUNK);
	if (f) {
		if (!hasjob(lf, J_PIRATE)) {
			if (rnd(1,6) <= ((f->lifetime/TM_DRUNKTIME)+1)) {
				// randomize move
				rndmove = B_TRUE; // ie. you can walk into walls now.
			}
		}
	} else if (iswoozy(lf)) {
		rndmove = B_TRUE;
	}

	if (rndmove) {
		dir = rnd(DC_N, DC_NW);
	}

	cell = getcellindir(lf->cell, dir);

	// warn if moving will cause damage
	if (cell && !cell->lf && onpurpose && isplayer(lf) ) {
		if (!confirm_injury_action(BP_LEGS, DT_SLASH, "move")) {
			return B_TRUE;
		}
	}

	// warn before moving onto dangerous cells
	if (onpurpose && isplayer(lf) && !lfhasflag(lf, F_SNEAK)) {
		if (cell && celldangerous(lf, cell, B_TRUE, &errcode)) {
			char ques[BUFLEN];
			char ch;
			if ((errcode == E_AVOIDOB) && rdata) {
				char obname[BUFLEN];
				object_t *avoidob;
				avoidob = (object_t *)rdata;
				getobname(avoidob, obname, avoidob->amt);
				snprintf(ques, BUFLEN, "Really %s into %s?", getmoveverb(lf), obname);
			} else {
				snprintf(ques, BUFLEN, "Really %s there?", getmoveverb(lf));
			}
			ch = askchar(ques, "yn","n", B_TRUE, B_FALSE);	
			if (ch != 'y') {
				return B_TRUE;
			}
		} 
	}

	moveok = B_FALSE;
	if (moveclear(lf, dir, &errcode)) {
		if (onpurpose) {
			if (canandwillmove(lf, dir, &errcode)) {
				moveok = B_TRUE;
			}
		} else {
			moveok = B_TRUE;
		}
	}
	
	if (moveok) {
		lifeform_t *alf;
		if (initiatemove(lf, cell, &dontclearmsg)) {
			// failed?
			return B_TRUE;
		}


		reason = E_OK;

		// remember last dir we walked
		killflagsofid(lf->flags, F_LASTDIR);
		addflag(lf->flags, F_LASTDIR, dir, NA, NA, NULL);

		// add footprints/scents in our current cell.
		addtrail(lf, lf->cell, dir, B_TRUE, B_TRUE);

		// do your pets see you move?
		if (isplayer(lf) && (gamemode == GM_GAMESTARTED)) {
			lifeform_t *l;
			for (l = lf->cell->map->lf ; l ; l = l->next) {
				flag_t *tf;
				if (isplayer(lf)) {
					tf = ispetortarget(l, lf);
					if (tf) {
						if (cansee(l, lf)) {
							// update text field
							free(tf->text);
							asprintf(&(tf->text), "%d", dir);
						}
					}
				}
			}
		}

		// now move to new cell
		moveto(lf, cell, rndmove ? B_FALSE : onpurpose, dontclearmsg);

		// take some time
		if (onpurpose) {
			// strafing sideways/backwards takes longer
			if (strafe && !lfhasflag(lf, F_AWARENESS)) {
				switch (reldir) {
					case RD_SIDEWAYS: howlong = pctof(125, howlong); break;
					case RD_BACKWARDS: howlong = pctof(150, howlong); break;
					case RD_FORWARDS:
						if (hasactivespell(lf, OT_S_TAILWIND)) {
							// faster
							howlong = pctof(75, howlong);
						} 
						break;
					default:
						break;
				}
			}
			limit(&howlong, SP_GODLIKE, NA);
			taketime(lf, howlong);
			if (!rndmove && !strafe) setfacing(lf, dir); // face the way we moved
		}

		// attached lfs or lfs you have grabbed will move the same direction if they can
		for (alf = cell->map->lf ; alf ; alf = alf->next) {
			int willdrag = B_FALSE;
			int attached = B_FALSE;
			int grabbed = B_FALSE;
			if (lfhasflagval(alf, F_ATTACHEDTO, lf->id, NA, NA, NULL)) {
				willdrag = B_TRUE;
				attached = B_TRUE;
				grabbed = B_FALSE;
			} else if (lfhasflagval(lf, F_GRABBING, alf->id, NA, NA, NULL)) {
				willdrag = B_TRUE;
				attached = B_FALSE;
				grabbed = B_TRUE;
			}
			if (willdrag) {
				// if the lifeform we were attached to just moved away from us,
				// try to stay with them.
				if (getcelldist(alf->cell,lf->cell) > 1) {
					int newdir;
					newdir = getdirtowards(alf->cell, lf->cell, alf, B_FALSE, DT_ORTH);
					// do a manual canmove check here first, to avoid 'the stirge flies into a wall'
					// if the move fails.
					//
					// but DONT do the check if you're dragging someone you grabbed.  otherwise 
					// moveclear() will say "can't move because someone is holding you"
					if (newdir != D_NONE) {
						cell_t *nc;
						nc = getcellindir(alf->cell, newdir);
						if (nc && cellwalkable(alf, nc, NULL)) {
							if (isplayer(lf)) {
								char alfname[BUFLEN];
								getlfname(alf, alfname);
								msg("You drag %s along.", alfname);
							} else if (isplayer(alf)) {
								char lfname[BUFLEN];
								getlfname(lf, lfname);
								msg("%s drags you along.", lfname);
							} else if (cansee(player, lf) || cansee(player, alf)) {
								char lfname[BUFLEN],alfname[BUFLEN];
								getlfname(lf, lfname);
								getlfname(alf, alfname);
								msg("%s drags %s along.", lfname, alfname);
							}
							movelf(alf, nc);
						}
					}
				}
			}
		}

		// train
		if (isswimming(lf)) {
			practice(lf, SK_SWIMMING, 1);
		}
	} else { // ie !moveok
		object_t *inway = NULL;
		int door, dooropen;
		reason = errcode;
		switch (errcode) {
			case E_OFFMAP:
				if (lf->cell->map->region->rtype->id == RG_WORLDMAP) {
					// cope with nonorthogonal!
					// ie. ne counts as n if we are at the top.
					if (!isorthogonal(dir)) {
						dir = getwalkoffdir(lf, dir);
					}
					if (dir != D_NONE) {
						// we are allowed to walk off the edge
						return walkoffmap(lf, dir, B_TRUE);
					}
				} 
				// otherwise fall through...
			case E_WALLINWAY:
				if (isplayer(lf)) {
					msg("Ouch! You %s into a %s.", getmoveverb(lf), 
						cell ? cell->type->name : "wall");
				} else if (cansee(player, lf)) {
					getlfname(lf, buf);
					msg("%s %ss into a %s.", buf, getmoveverb(lf),
						cell ? cell->type->name : "wall");
				} 
				//if (isblind(lf) || !haslos(lf, cell)) {
				if (!cell || !haslos(lf, cell)) {
					if (isplayer(lf)) {
						// only take damage if we didn't know about this
						if ((cell && !cell->known) || iswoozy(lf)) {
							snprintf(buf, BUFLEN, "%sing into a %s", getmoveverb(lf),
								cell ? cell->type->name : "wall");
							losehp(lf, 1, DT_BASH, NULL, buf);
							if (cell) {
								// we now know there is a wall there.
								setcellknown(cell, B_FALSE);
							}

							if (onpurpose) taketime(lf, getmovespeed(lf));
						}
					} else {
						snprintf(buf, BUFLEN, "%sing into a %s", getmoveverb(lf),
							cell ? cell->type->name : "wall");
						losehp(lf, 1, DT_BASH, NULL, buf);
						if (onpurpose) taketime(lf, getmovespeed(lf));
					}
				}
				break;
			case E_DOORINWAY:
				inway = (object_t *)rdata;
				door = isdoor(inway, &dooropen);
				if (door && !dooropen) {
					if (isblind(lf)) {
						// run into it
						if (isplayer(lf)) {
							if (cell->known) {
								// try to open it
								if (!opendoor(lf, inway)) {
									// opening a door counts as a successful move.
									reason = E_OK;
								}
							} else {
								msg("Ouch! You %s into a door.", getmoveverb(lf));
								setcellknown(cell, B_FALSE);
								snprintf(buf, BUFLEN, "%sing into a door", getmoveverb(lf));
								losehp(lf, 1, DT_BASH, NULL, buf);
								if (onpurpose) taketime(lf, getmovespeed(lf));
							}
						} else {
							if (cansee(player, lf)) {
								getlfname(lf, buf);
								msg("%s %ss into a door.", buf, getmoveverb(lf));
							}
							snprintf(buf, BUFLEN, "%sing into a door", getmoveverb(lf));
							losehp(lf, 1, DT_BASH, NULL, buf);
							if (onpurpose) taketime(lf, getmovespeed(lf));
						}
					} else {
						// try to open it
						if (!opendoor(lf, inway)) {
							// opening a door counts as a successful move.
							reason = E_OK;
						}
					}
				}
				break;
			case E_OBINWAY:
				inway = (object_t *)rdata;
				// can we push this?
				if (ispushable(inway)) {
					if (canpush(lf, inway, dir)) {
						// push it!
						push(lf, inway, dir);
					} else {
						if (isplayer(lf)) {
							char obname[BUFLEN];
							getobname(inway, obname, 1);
							switch (reason) {
								case E_TOOHEAVY:
									msg("The %s is too heavy to move.",strchr(obname, ' ')+1);
									break;
								case E_INSUBSTANTIAL:
									msg("You cannot push %s without a physical body!",strchr(obname, ' ')+1);
									break;
								default:
									msg("The %s won't move for some reason.",strchr(obname, ' ')+1);
									break;
							}
						}
					}
				} else { // somethign random is in the way
					if (isplayer(lf) && inway) {
						char obname[BUFLEN];
						if (haslos(lf, cell)) {
							getobname(inway, obname, 1);
						} else {
							strcpy(obname, "something");
						}
						msg("There is %s in your way.",obname);
					}
				}
				break;
			case E_SWIMMING:
				if (isplayer(lf)) {
					msg("You can't attack while swimming!");
				} 
				break;
			case E_LFINWAY:
				if (initiatemove(lf, cell, &dontclearmsg)) {
					// failed?
					return B_TRUE;
				}
				// walking backwards/sideways into someone
				if (!lfhasflag(lf, F_AWARENESS) && (getrelativedir(lf, dir) != RD_FORWARDS)) {
					char lfname[BUFLEN];
					char inwayname[BUFLEN];
					getlfname(cell->lf, inwayname);
					if (isplayer(lf)) {
						msg("You bump into %s.", inwayname);
					} else if (isplayer(cell->lf)) {
						getlfname(lf, lfname);
						msg("%s bumps into you.", lfname);
					} else if (cansee(player, lf)) {
						getlfname(lf, lfname);
						msg("%s bumps into %s.", lfname, inwayname);
					}
					if (onpurpose) taketime(lf, getmovespeed(lf));
				} else {
					if (canswapwith(lf, cell->lf)) {
						lifeform_t *lfinway;
						// otherwise swap locations.
						lfinway = cell->lf;

						if (isplayer(lf)) {
							char lfname[BUFLEN];
							getlfname(lfinway, lfname);
							msg("You swap places with %s.", lfname);
							dontclearmsg = B_TRUE;
						}

						swapplaces(lf, lfinway, B_FALSE, onpurpose);

						if (onpurpose) taketime(lf, getmovespeed(lf));

					} else {
						if (!onpurpose || canandwillmove(lf, dir, &errcode)) {
							return attackcell(lf, cell, B_FALSE);
						} else {
							// won't attack for some reason.
							return B_TRUE;
						}
					}
				}
				break;
			case E_CANTMOVE:
				if (isplayer(lf)) {
					msg("You cannot move!");
				}
				if (onpurpose) taketime(lf, getmovespeed(lf));
				break;
			case E_GRABBEDBY:
				if (rdata) {
					lifeform_t *grabbedby;
					char gbname[BUFLEN];
					// skill check to escape.
					grabbedby = (lifeform_t *)rdata;
					getlfname(grabbedby, gbname);
					if (!cell->lf && skillcheckvs(lf, SC_STR, 0, grabbedby, SC_STR, 0)) {
						// broke free
						killflagsofid(lf->flags, F_GRABBEDBY);
						killflagsofid(grabbedby->flags, F_GRABBING);
						// move - don't clear the 'you break free from' msg
						// NOW is the move possible?
						if (moveclear(lf, dir, &errcode)) {
							moveto(lf, cell, B_TRUE, B_TRUE);
						}
					} else {
						if (isplayer(lf)) {
							msg("You cannot get away from %s!",gbname);
						}
					}
				} else {
					if (isplayer(lf)) {
						msg("You cannot get away from whatever is holding you!");
					}
				}
				if (onpurpose) taketime(lf, getmovespeed(lf));
				break;
			case E_PENTAGRAM:
				if (isplayer(lf)) {
					msg("You cannot seem to enter the pentagram.");
				}
				if (onpurpose) taketime(lf, getmovespeed(lf));
				break;
			case E_TOOHEAVY:
				if (isplayer(lf)) {
					msg("Your load is too heavy to move with!");
				}
				if (onpurpose) taketime(lf, getmovespeed(lf));
				break;
			default:
				break;
		}
	}


	// purposely moving away fmor money?
	if (onpurpose && isplayer(lf) && srcmoney) {
		angergodmaybe(R_GODTHIEVES, srcmoney);
	}

	if (reason != E_OK) {
		return B_TRUE;
	}
	return B_FALSE;
}

int walkoffmap(lifeform_t *lf, int dir, int onpurpose) {
	map_t *adjmap = NULL, *thismap;
	cell_t *dst = NULL;
	lifeform_t *adjally[MAXFOLLOWLFS];
	int seen[MAXFOLLOWLFS];
	int nadjallies = 0;
	int n;

	// make sure dircetion is orthogonal
	dir = makeorthogonal(dir);
	assert(dir != D_NONE);

	// announce
	if (isplayer(lf)) {
		char dirname[BUFLEN];
		curs_set(1);
		strcpy(dirname, getdirname(dir));
		dirname[0] = tolower(dirname[0]);
		msg("You %s to the %s...", getmoveverb(lf), getdirname(dir));
		// move cursor to msgwindow while we create the new level...
		wrefresh(msgwin);
	} else if (cansee(player, lf)) {
		char dirname[BUFLEN];
		char lfname[BUFLEN];
		getlfname(lf, lfname);
		curs_set(1);
		strcpy(dirname, getdirname(dir));
		dirname[0] = tolower(dirname[0]);
		msg("%s %s to the %s...", lfname, getmoveverbother(lf), getdirname(dir));
		wrefresh(msgwin);
	}

	// is there a map in that direction ?
	thismap = lf->cell->map;
	adjmap = findmap(lf->cell->map->nextmap[dir]);
	if (!adjmap) {
		// make one
		adjmap = addmap();
		createmap(adjmap, thismap->depth, thismap->region, thismap, dir, NULL);
	}

	if (adjmap) {
		// find an empty cell in the next map
		dst = findmapentrypoint(adjmap, diropposite(dir), lf);
	} 

	if (!dst) {
		// failed
		if (isplayer(lf)) {
			msg("Your path seems to be blocked.");
		} 
		return B_TRUE;
	}

	if (onpurpose && isplayer(lf)) {
		// get list of adjacent allies
		getwhowillfollow(lf, NULL, adjally, seen, &nadjallies);
		for (n = 0; n < nadjallies; n++) {
			if (seen[n]) {
				char lname[BUFLEN];
				real_getlfname(adjally[n], lname, B_FALSE);
				msg("%s follows you.", lname);
			}
		}
	}

	// announce
	announcearrival(lf, dst->map);

	// move there
	moveto(lf, dst, onpurpose, B_TRUE);
	if (onpurpose) {
		taketime(lf, getmovespeed(lf));
	}

	// move adjacent allies
	if (onpurpose) {
		for (n = 0; n < nadjallies; n++) {
			cell_t *c;
			c = getrandomadjcell(dst, WE_WALKABLE, B_ALLOWEXPAND); 
			if (c) {
				if (!initiatemove(adjally[n], NULL, NULL)) {
					movelf(adjally[n], c);
					taketime(adjally[n], getmovespeed(adjally[n]));
				}
			}
		}
	}

	if (isplayer(lf)) {
		statdirty = B_TRUE;
		needredraw = B_TRUE;
		calclight(lf->cell->map);
		setlosdirty(lf); 
		//precalclos(lf);
		drawscreen();
	}

	return B_FALSE;
}

int willmove(lifeform_t *lf, int dir, enum ERROR *error) {
	cell_t *cell;
	enum ATTRBRACKET iq;
	object_t *o;
	char buf[BUFLEN];
	flag_t *f;

	//object_t *o;
	iq = getattrbracket(getattr(lf, A_IQ), A_IQ, NULL);

	// default
	if (error) {
		*error = E_OK;
		rdata = NULL;
	}

	if (iswoozy(lf)) {
		return B_TRUE;
	}

	cell = getcellindir(lf->cell, dir);
	if (!cell) {
		// won't walk off map
		return B_FALSE;
	}

	if (celldangerous(lf, cell, B_TRUE,  error)) {
		if (error) *error = E_WONT;
		return B_FALSE;
	}

	// some lfs will only leave their rooms if they have a target
	// ie. shopkeepers
	f = lfhasflag(lf, F_STAYINROOM);
	if (f) {
		int roomid;
		roomid = f->val[0];
		if (roomid == NA) {
			// don't move out of ANY room.
			if ((getroomid(lf->cell) != getroomid(cell))) {
				if ((f->val[1] != NA) && aihastarget(lf)) {
					// exception!
				} else {
					if (error) *error = E_WONT;
					return B_FALSE;
				}
			}
		} else {
			// don't move out of the given room.
			if ((getroomid(lf->cell) == roomid) && (getroomid(lf->cell) != getroomid(cell))) {
				if ((f->val[1] != NA) && aihastarget(lf)) {
					// exception!
				} else {
					if (error) *error = E_WONT;
					return B_FALSE;
				}
			}
		}
	}

	if (lfhasflag(lf, F_STAYINHABITAT) && (cell->habitat->id != lf->cell->habitat->id)) {
		if (error) *error = E_WONT;
		return B_FALSE;
	}

	// don't attack other monsters
	if (cell->lf) { // if someone is in the way
		object_t *defenderwep = NULL;
		if (lf->race->raceclass->id == RC_INSECT) {
			if (hasactivespell(cell->lf, OT_S_REPELINSECTS)) {
				if (error) *error = E_WONT;
				return B_FALSE;
			}
		}

		defenderwep = getweapon(cell->lf);
		if (defenderwep) {
			if (lfhasflagval(lf, F_AVOIDOBTYPE, defenderwep->type->id, B_TRUE, NA, NULL)) {
				if (error) *error = E_WONT;
				return B_FALSE;
			}
		}

		if (!isplayer(lf)) { // if we are a monster
			// if the person in the way isn't our enemy...
			if (!areenemies(lf, cell->lf)) {
				// if they are an ally...
				if (canswapwith(lf, cell->lf)) {
					return B_TRUE;
				}
				if (error) *error = E_WONT;
				return B_FALSE;
			}
		}
	}

	// for at least average iq things...
	if (iq >= AT_AVERAGE) {
		// don't move if in pain
		if (move_will_hurt(lf)) {
			if (error) *error = E_WONT;
			return B_FALSE;
		}
	}

	// look for avoided objects (because they are cursed).
	for (o = cell->obpile->first ; o ; o = o->next) {
		flag_t *f;
		snprintf(buf, BUFLEN, "%ld",o->id);
		f = lfhasflagval(lf, F_AVOIDOB, NA, NA, NA, buf);
		if (f) {
			// still cursed?
			if ((f->val[0] != NA) && (o->blessed == f->val[0])) {
				if (error) *error = E_WONT;
				return B_FALSE;	
			} else {
				// remove the flag.
				killflag(f);	
			}
		}

		if (hasflag(o->flags, F_TRAP)) {
			if (hasflag(o->flags, F_SECRET)) {
				// hidden traps?
				if (iq >= AT_GTAVERAGE) {
					if (error) *error = E_WONT;
					return B_FALSE;	
				}
			} else {
				// non-hidden traps?
				if (iq >= AT_AVERAGE) {
					if (error) *error = E_WONT;
					return B_FALSE;	
				}
			}
		}
	}

	return B_TRUE;
}