nexus/map.c

#include <assert.h>
#include <ctype.h>
#include <math.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "attack.h"
#include "defs.h"
#include "flag.h"
#include "io.h"
#include "move.h"
#include "nexus.h"
#include "lf.h"
#include "map.h"
#include "objects.h"
#include "text.h"
#include "vault.h"

int enteringmap = B_FALSE;

extern habitat_t *firsthabitat,*lasthabitat;
extern job_t *firstjob;
extern map_t *firstmap,*lastmap;
extern region_t *firstregion,*lastregion;
extern regionoutline_t *firstregionoutline,*lastregionoutline;
extern regiontype_t *firstregiontype,*lastregiontype;
extern celltype_t *firstcelltype, *lastcelltype;
extern objecttype_t *objecttype,*lastobjecttype;
extern race_t *firstrace;
extern int viewx,viewy,vieww,viewh;
extern lifeform_t *player;

extern int nextregionthingid;

extern lifeform_t *godlf[];
extern int ngodlfs;

extern glyph_t tempglyph;

extern enum OBCLASS sortorder[];

extern enum ERROR reason;

extern enum GAMEMODE gamemode;

extern int needredraw;
extern int noredraw;

extern long curtime;

cell_t *addcell(map_t *m, int x, int y) {
	cell_t *cell;
	
	// already allocated?
	cell = m->cell[(y*m->w)+x];
	if (cell) {
		clearcell(cell);
		free(cell);
	}

	m->cell[(y*m->w)+x] = malloc(sizeof(cell_t));
	cell = m->cell[(y*m->w)+x];
	cell->map = m;
	cell->x = x;
	cell->y = y;
	cell->habitat = m->habitat;
	cell->obpile = addobpile(NOOWNER, cell, NOOB);
	cell->type = NULL;
	setcelltype(cell, cell->habitat->solidcelltype);
	cell->lf = NULL;
	cell->room = NULL;
	cell->locked = B_FALSE;
	cell->lit = L_NOTLIT;
	cell->origlit = L_NOTLIT;
	cell->littimer = 0;
	cell->origlittimer = 0;
	cell->writing = NULL;
	cell->writinglifetime = -1;
	cell->known = B_FALSE;
	cell->knowntime = 0;
	cell->knownglyph.ch = ' ';
	cell->knownglyph.colour = C_GREY;
	cell->visited = B_FALSE;
	cell->filled =  B_FALSE;
	cell->isroomwall = D_NONE;
	return cell;
}

habitat_t *addhabitat(enum HABITAT id, char *name, enum CELLTYPE emptycell, enum CELLTYPE solidcell, int thingchance, int obchance, int vaultchance, int maxvisrange, enum OBTYPE upstairtype, enum OBTYPE downstairtype) {
        habitat_t *a;
        // add to the end of the list 
        if (firsthabitat == NULL) {
                firsthabitat = malloc(sizeof(habitat_t));
                a = firsthabitat;
                a->prev = NULL;
        } else {
                // go to end of list
                a = lasthabitat;
                a->next = malloc(sizeof(habitat_t));
                a->next->prev = a;
                a = a->next;
        }
        lasthabitat = a;
        a->next = NULL;

	// props
	a->id = id;
	a->name = strdup(name);
	a->emptycelltype = emptycell;
	a->solidcelltype = solidcell;
	a->randthingpct = thingchance;
	a->randobpct = obchance;
	a->randvaultpct = vaultchance;
	a->maxvisrange = maxvisrange;
	a->upstairtype = upstairtype;
	a->downstairtype = downstairtype;
	return a;
}

void addhomeobs(lifeform_t *lf) {
	flag_t *f;
	for (f = lf->flags->first ; f ; f = f->next) {
		if (f->id == F_HOMEOB) {
			addob(lf->cell->obpile, f->text);
		} else if (f->id == F_HOMELEVOB) {
			int i,amt;
			amt = rnd(f->val[0],f->val[1]);
			for (i = 0; i < amt; i++) {
				cell_t *c;
				// pick new EMPTY random spot
				c = getrandomcell(lf->cell->map);
				while (!cellwalkable(NULL, c, NULL)) {
					c = getrandomcell(lf->cell->map);
				}
				addob(c->obpile, f->text);
			}
		}
	}
}

map_t *addmap(void) {
        map_t *a;
	int id;
	int i;
	// is there already a map?
	if (lastmap) {
		id = lastmap->id + 1;
	} else {
		id = 0;
	} 

        // add to the end of the list 
        if (firstmap == NULL) {
                firstmap = malloc(sizeof(map_t));
                a = firstmap;
                a->prev = NULL;
        } else {
                // go to end of list
                a = lastmap;
                a->next = malloc(sizeof(map_t));
                a->next->prev = a;
                a = a->next;
        }
        lastmap = a;
        a->next = NULL;

	// props
	a->id = id;
	a->lf = NULL;
	for (i = 0; i < MAXDIR_MAP; i++) {
		a->nextmap[i] = -1;
	}
	for (i = 0 ; i < MAX_MAPW*MAX_MAPH; i++) {
		a->cell[i] = NULL;
	}
	a->flags = addflagpile(NULL, NULL);
	a->beingcreated = B_TRUE;
	a->illumination = IL_FULLLIT;
	a->habitat = findhabitat(H_DUNGEON); // default!!!
	a->lastplayervisit = -1;
	a->nfixedrooms = 0; 
	return a;
}


// when monsters are made during level generation, autogen will be true. otherwise false;
// if "rid" RR_SPECIFIED, parse racename to get the race.
// otherwise just use the given race.
lifeform_t *addmonster(cell_t *c, enum RACE rid, char *racename, int jobok, int amt, int autogen, int *nadded) {
	lifeform_t *lf = NULL;
	race_t *r;
	int db = B_FALSE;
	flagpile_t *wantflags = NULL;
	enum JOB wantjob = J_NONE;


	if (nadded) *nadded = 0;

	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	// ie. don't create mosnters on closed doors!
	if (!cellwalkable(NULL, c, NULL)) {
		return NULL;
	}

	wantflags = addflagpile(NULL, NULL);

	// override...
	if (streq(racename, "random")) {
		rid = R_RANDOM;
	}

	if (rid != R_SPECIFIED) {
		if (rid == R_RANDOM) {
			r = getrandomrace(c, NA);
		} else {
			r = findrace(rid);
		}
	} else {

		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
		rid = parserace(racename, wantflags, &wantjob);
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

		if (rid == R_RANDOM) {
			r = getrandomrace(c, NA);
		} else {
			r = findrace(rid);
		}
	}
	if (!r) {
		killflagpile(wantflags);
		return NULL;
	}
	
	if (db) {
		char buf[BUFLEN];
		snprintf(buf, BUFLEN, "addmonster for '%s'->%s",racename, r->name);
		dbtimestart(buf);
	}
	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	//if (db) dblog("adding rand lf %s to cell %d,%d",r->name,c->x,c->y);

	if (r) {
		if (db) dbtime("doing lf addition");

		if (hasflag(r->flags, F_UNIQUE)) {
			// does it already exist?
			lf = findlfunique(rid);

			// if so, move it here, then exit.
			if (lf) {
				teleportto(lf, c, B_FALSE);
				killflagpile(wantflags);
				return lf;
			}
		} 

		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
		lf = addlf(c, r->id, getrandommonlevel(r, c->map));
		if (db) dbtime("finished lf addition");
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
		if (lf) {
			flag_t *f;
		
			if (nadded) (*nadded)++;

			if (db) dbtime("checking for job");
			lf->born = B_FALSE;

			if (wantjob == J_NONE) {
				if (jobok) {
					int nretflags,i;
					flag_t *retflag[MAXCANDIDATES];
					getflags(lf->flags, retflag, &nretflags, F_STARTJOB, F_NONE);
					for (i = 0; i < nretflags; i++) {
						f = retflag[i];
						// has a job?
						if (f->id == F_STARTJOB) {
							if (rnd(1,100) <= f->val[0]) {
								if (f->val[1] == J_RANDOM) {
									job_t *j;
									j = getrandomjob(B_TRUE);
									wantjob = j->id;
								} else {
									wantjob = f->val[1];
								}
								givejob(lf, wantjob);
								break;
							}
						}
					}
				}
			} else {
				givejob(lf, wantjob);
			}
			//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

			if (autogen) {
				// sometimes start off hiding/asleep in new maps
				f = lfhasflag(lf, F_STARTHIDDENPCT);
				if (f) {
					if (rnd(1,100) <= f->val[0]) {
						// note:  if we start off hidden, we have no hide penalty.
						// this is so we can have monsters which start hidden, but
						// don't have the 'hide' skill. 
						addflag(wantflags, F_HIDING, 0, NA, NA, NULL);
					}
				}
				if (!lfhasflag(lf, F_HIDING) && !lfhasflag(lf, F_DEAF) && cansleep(lf) ) {
					// if not already asleep...
					if (hasflag(wantflags, F_ASLEEP)) {
					} else {
						int asleepchance = 70,willsleep = B_FALSE;
						f = lfhasflag(lf, F_STARTASLEEPPCT);
						if (f) {
							asleepchance = f->val[0];
						}
						// TODO: base this on the time, and whether monster is nocturnal
						if (pctchance(asleepchance)) {
							willsleep = B_TRUE;
						} else {
							// might be asleep based on time.
							if (issleepingtimefor(lf)) {
								willsleep = B_TRUE;
							}
						}
						if (willsleep) {
							addflag(wantflags, F_ASLEEP, NA, ST_ASLEEP, NA, NULL); 
						}
					}
				}
				finalisemonster(lf, NULL, wantflags);
			}
			lf->born = B_TRUE;
			//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

			// appears in groups?
			if (db) dbtime("handling groups");
			if (autogen) {
				f = hasflag(lf->flags, F_NUMAPPEAR);
				if (f) {
					// override amount
					amt = rnd(f->val[0], f->val[1]);
				}
				if (amt > 1) {
					cell_t *adjcell;
					amt--; // we've already added one

					//adjcell = c;
					for ( ; amt > 0; amt--) {
						lifeform_t *newlf;
						// find an adjacent cell to one of the newly added monsters,
						// starting with the first one
						adjcell = real_getrandomadjcell(c, WE_WALKABLE, B_ALLOWEXPAND, LOF_WALLSTOP, NULL, NULL);
						// did we find one?
						if (!adjcell) break;

						newlf = addlf(adjcell, r->id, getrandommonlevel(r, adjcell->map));
						if (!newlf) {
							break;
						}
						if (nadded) (*nadded)++;
						newlf->born = B_FALSE;


						finalisemonster(newlf, lf, wantflags);

						newlf->born = B_TRUE;

						// initial monster should remember its minions
						addflag(lf->flags, F_MINION, newlf->id, NA, NA, NULL);
					}
				}
			}
			//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

			// minons?
			// appears in groups?
			if (db) dbtime("handling minions");
			if (autogen) {
				f = hasflag(lf->flags, F_MINIONS);
				if (f) {
					if (rnd(1,100) <= f->val[0]) {
						int n;
						cell_t *adjcell;
						int nminions;
						// override amount
						nminions = rnd(f->val[1], f->val[2]);

						for (n = 0; n < nminions; n++) {
							lifeform_t *newlf;
							race_t *newr;

							adjcell = real_getrandomadjcell(c, WE_WALKABLE, B_ALLOWEXPAND, LOF_WALLSTOP, NULL, NULL);
							if (!adjcell) break;

							newr = findracebyname(f->text);
							if (!newr) break;

							newlf = addlf(adjcell, newr->id, getrandommonlevel(newr, adjcell->map));
							if (!newlf) break;

							if (nadded) (*nadded)++;

							finalisemonster(newlf, lf, wantflags);

							newlf->born = B_TRUE;
						}
					}
				}
			}
			//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

			
			if (db) dbtime("handling random objects");
			// sometimes give the lf random objects (extra monsters through 
			// 'numappears' don't get them).
			if (onein(3)) {
				giverandomobs(lf, rnd(1,3));
				while (onein(3)) {
					giverandomobs(lf, 1);
				}	
			}

			//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

			if (db) dbtime("giving torches");
			// humanoids on dark levels which can't see will probably have some
			// kind of light producing device
			if (!islit(c) && !hasflag(lf->flags, F_SEEINDARK) && !hasflag(lf->flags, F_TREMORSENSE)) {
				if (lfhasflag(lf, F_HUMANOID)) {
					objecttype_t *ot, *poss[MAXCANDIDATES];
					int nposs = 0;
					// get a random light-producing object
					for (ot = objecttype ; ot ; ot = ot->next) {
						if (hasflag(ot->flags, F_OPERABLE) &&
						    hasflagval(ot->flags, F_ACTIVATECONFER, F_PRODUCESLIGHT, NA, NA, NULL)) {
							poss[nposs++] = ot;
						}
					}
					if (nposs > 0) {
						ot = poss[rnd(0,nposs-1)];
					} else {
						ot = NULL;
					}
					if (ot) {
						object_t *o;
						o = addobfast(lf->pack, ot->id);
						if (o) turnon(NULL, o);
					}
				}
			}
			//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

			//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
		} // end if lf
	} 

	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
	// free mem
	killflagpile(wantflags);
	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	if (db) dbtimeend("finished addmonster");

	return lf;
}

object_t *addrandomob(cell_t *c) {
	char buf[BUFLEN];
	int db = B_FALSE;
	object_t *o = NULL;

	if (c->type->solid) {
		return NULL;
	}

	if (real_getrandomob(c->map, buf, NA, c->habitat->id, SZ_MAX, SK_NONE, B_FALSE, OC_NONE, DT_NONE)) {
		if (db) dblog("adding rand obj %s to cell %d,%d",buf,c->x,c->y);
		o = addob(c->obpile, buf);
	}
	return o;
}

int addrandomthing(cell_t *c, int obchance, int *nadded) {
	int rv = TT_NONE;

	// if there's already someone there,
	// then add an object.
	if (!cellwalkable(NULL, c, NULL) || (rnd(1,100) <= obchance)) {
		object_t *o;
		// object
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
		o = addrandomob(c);
		if (o) {
			if (nadded) *nadded = o->amt;
			rv = TT_OBJECT;
		}
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
	} else {
		lifeform_t *lf;
		// monster
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
		lf = addmonster(c, R_RANDOM, NULL, B_TRUE, 1, B_TRUE, nadded);
		if (lf) {
			rv = TT_MONSTER;
		} 
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
	}
	return rv;
}

map_t *getmapindir(map_t *src, int dir) {
	map_t *other = NULL;
	if (src->nextmap[dir] != -1) {
		other = findmap(src->nextmap[dir]);
	} else {
		if (dir == D_DOWN) {
			other = findregionmap(src->region->id, src->depth+1);
		} else {
			other = findregionmap(src->region->id, src->depth-1);
		}
	}
	return other;
}

// 
int getmapmaxvisrange(map_t *m) {
	int maxrange;

	maxrange = m->habitat->maxvisrange;

	// modify for darkness outside ?
	if (isoutdoors(m)) {
		int hours,mins,secs;
		float pct;
		splittime(&hours,&mins,&secs);
		pct =  ((float)mins/59.0) * 100.0;
		if (hours == 6) { // ie. 6am - 7am
			// getting lighter.  as minutes approach 59,
			// visrange gets closer to maximum.
			maxrange = pctof( pct, maxrange);
			limit(&maxrange, 1, NA);
		} else if (hours == 18) { // ie. 6pm-7pm
			// getting darker.  as minutes approach 59,
			// visrange gets closer to zero.
			maxrange = pctof( 100 - pct, maxrange);
			limit(&maxrange, 1, NA);
		}
	} else if (m->habitat->id == H_DUNGEON) {
		// in dungeon, reduce distance based on depth (ie. ambient light)
		maxrange -= m->depth;
	}

	limit(&maxrange, 0, MAXVISRANGE);

	return maxrange;
}

// populates retcell[] with all cells within given radius of centre
// if 'scatter' is >0, then not all cells will be returned - as you approach the edge of the radius,
// chances of getting the cells are lowered
void getradiuscells(cell_t *centre, int radius, int dirtype, int outsideonly, enum LOFTYPE needlof, int wantcentre, cell_t **retcell, int *ncells, int scatterdensity) {
	int (*distfunc)(cell_t *, cell_t *);
	int x,y;
	cell_t *c;

	*ncells = 0;

	if (!centre) {
		return;
	}
	if (dirtype == DT_ORTH) {
		distfunc = getcelldistorth;
	} else {
		distfunc = getcelldist;
	}
	for (y = centre->y - radius; y <= centre->y + radius; y++) {
		for (x = centre->x - radius; x <= centre->x + radius; x++) {
			c = getcellat(centre->map, x,y);
			if (c) {
				int distance,distmatch = B_FALSE;
				distance = distfunc(centre, c);
				if (outsideonly) {
					if (distance == radius) distmatch = B_TRUE;
				} else {
					if (distance <= radius) distmatch = B_TRUE;
				}
				if (distmatch && haslof(centre, c, needlof, NULL) && (wantcentre || (c != centre)) ) {
					int chance;
					if (scatterdensity) {
						chance = 100 - (((float)distance / (float)radius) * scatterdensity);
					} else {
						chance = 100;
					}
					if (pctchance(chance)) {
						retcell[*ncells] = c;
						(*ncells)++;
					}
				}
			}
		}
	}
}

int getroomid(cell_t *c) {
	if (c->room) {
		return c->room->id;
	} 
	return -1;
}

// whichside should be D_ORTH
// for now, this function will NOT include room corners
void getroomedge(map_t *map, int roomid, int minx, int miny, int maxx, int maxy, int whichside, cell_t **retcell, int *ncells, int onlywantsolid) {
	int x,y;
	cell_t *c;
	*ncells = 0;
	if (whichside == D_N) {
		y = miny;
		for (x = minx+1; x <= maxx-1; x++) {
			c = getcellat(map, x, y);
			if (!onlywantsolid || c->type->solid) {
				retcell[*ncells] = getcellat(map, x, y);
				(*ncells)++;
			}
		}
	} else if (whichside == D_S) {
		y = maxy;
		for (x = minx+1; x <= maxx-1; x++) {
			c = getcellat(map, x, y);
			if (!onlywantsolid || c->type->solid) {
				retcell[*ncells] = getcellat(map, x, y);
				(*ncells)++;
			}
		}
	} else if (whichside == D_W) {
		x = minx;
		for (y = miny+1; y <= maxy-1; y++) {
			c = getcellat(map, x, y);
			if (!onlywantsolid || c->type->solid) {
				retcell[*ncells] = getcellat(map, x, y);
				(*ncells)++;
			}
		}
	} else if (whichside == D_E) {
		x = maxx;
		for (y = miny+1; y <= maxy-1; y++) {
			c = getcellat(map, x, y);
			if (!onlywantsolid || c->type->solid) {
				retcell[*ncells] = getcellat(map, x, y);
				(*ncells)++;
			}
		}
	}
}

// if outlineid is -1, it's automatically assigned
region_t *addregion(enum REGIONTYPE rtype, region_t *parent, int outlineid, int depthmod, int createdby) {
        region_t *a;
	regionoutline_t *ro,*poss[MAXCANDIDATES];
	int nposs = 0;
	int id;
	regiontype_t *rt;

	rt = findregiontype(rtype);
	if (rt->majorbranch) {
		// check for dupes
		if (findregionbytype(rtype)) {
			dblog("ERROR - trying to add duplicate region for a major branch (%s)", rt->name);
			msg("ERROR - trying to add duplicate region for a major branch (%s)", rt->name);
			more();
			raise(SIGINT); // debug
		}
	}

	// is there already a region?
	if (lastregion) {
		id = lastregion->id + 1;
	} else {
		id = 0;
	} 

        // add to the end of the list 
        if (firstregion == NULL) {
                firstregion = malloc(sizeof(region_t));
                a = firstregion;
                a->prev = NULL;
        } else {
                // go to end of list
                a = lastregion;
                a->next = malloc(sizeof(region_t));
                a->next->prev = a;
                a = a->next;
        }
        lastregion = a;
        a->next = NULL;

	// props
	a->id = id;
	a->rtype = findregiontype(rtype);
	a->parentregion = parent;
	a->depthmod = depthmod;
	a->createdbymapid = createdby;

	if (outlineid == -1) {
		// randomly assign a regionoutline
		for (ro = firstregionoutline; ro ; ro = ro->next) {
			if (ro->rtype->id == rtype) {
				poss[nposs++] = ro;
			}
		}
		// make sure we got one...
		if (nposs) {
			a->outline = poss[rnd(0,nposs-1)];
		} else {
			a->outline = NULL;
		}
	} else {
		a->outline = findoutline(outlineid);
		assert(a->outline);
	}
	return a;
}

regionoutline_t *addregionoutline(enum REGIONTYPE rtype) {
        regionoutline_t *a;
	int nextid;

	// calculate next region outline id
	if (!lastregionoutline) { // ie. this is the first one to be created
		nextid = 0;
	} else {
		nextid = lastregionoutline->id + 1;
	}

        // add to the end of the list 
        if (firstregionoutline == NULL) {
                firstregionoutline = malloc(sizeof(regionoutline_t));
                a = firstregionoutline;
                a->prev = NULL;
        } else {
                // go to end of list
                a = lastregionoutline;
                a->next = malloc(sizeof(regionoutline_t));
                a->next->prev = a;
                a = a->next;
        }
        lastregionoutline = a;
        a->next = NULL;

	// props
	a->id = nextid;
	a->rtype = findregiontype(rtype);
	a->nthings = 0;
	return a;
}

regionthing_t *addregionthing(regionoutline_t *ro, int depth, int x, int y, enum REGIONTHING whatkind, int value, char *what) {
	regionthing_t *rt;
	rt = &(ro->thing[ro->nthings]);
	rt->id = nextregionthingid;
	nextregionthingid++;
	rt->parent = ro;
	rt->depth = depth;
	rt->x = x;
	rt->y = y;
	rt->whatkind = whatkind;
	rt->value = value;
	if (what) {
		rt->what = strdup(what);
	} else {
		rt->what = strdup("");
	}

	ro->nthings++;

	if (ro->nthings >= MAXOUTLINETHINGS) {
		dblog("error - too many outlinethings!");
		printf("error - too many outlinethings!\n");
		exit(1);
	}
	return rt;
}

regiontype_t *addregiontype(enum REGIONTYPE id, char *name, int pluralname, enum HABITAT defaulthabitat, int maxdepth, int stairsperlev, int deeperdir, int major, int depthmod) {
        regiontype_t *a;

        // add to the end of the list 
        if (firstregiontype == NULL) {
                firstregiontype = malloc(sizeof(regiontype_t));
                a = firstregiontype;
                a->prev = NULL;
        } else {
                // go to end of list
                a = lastregiontype;
                a->next = malloc(sizeof(regiontype_t));
                a->next->prev = a;
                a = a->next;
        }
        lastregiontype = a;
        a->next = NULL;

	// props
	a->id = id;
	a->name = strdup(name);
	a->pluralname = pluralname;
	a->defaulthabitat = defaulthabitat;
	a->maxdepth = maxdepth;
	a->stairsperlev = stairsperlev;
	a->deeperdir = deeperdir;
	a->majorbranch = major;
	a->depthmod = depthmod;
	return a;
}


void adjustcellglyphforlight(cell_t *c, glyph_t *g) {
	if (g->ch == ' ') return;
	switch (c->lit) {
		case L_PERMDARK:
		case L_NOTLIT:
			g->colour = C_BLUE;
			break;
		case L_TEMP: // lit by a light source
			if (g->colour < 8) {
				g->colour = g->colour + 8; // ie. make bold
				if (g->colour >= C_GREY) g->colour = C_WHITE;
			}
			break;
		case L_PERMLIGHT:
			break;
	}
}

int autodoors(map_t *map, int roomid, int minx, int miny, int maxx, int maxy, int doorpct, int dooropenchance) {
	int i,d;
	cell_t *poss[MAXCANDIDATES], *cell[MAXCANDIDATES]; // TODO: should this be maxroomw * maxroomh ?
	int possdir[MAXCANDIDATES];
	int ncells = 0, npossible = 0;
	int doorsadded = 0;
	int db = B_TRUE;

	if (db) dblog("autodoors starting");

	// for each side, make list of all possible door locations
	// then pick one randomly.
	// BUT if the nearby corridor only has one exit, always
	// place a door.
	for (d = D_N; d <= D_W; d++) {
		npossible = 0;
		getroomedge(map, roomid, minx, miny, maxx, maxy, d, cell, &ncells, B_TRUE);
		for (i = 0; i < ncells; i++) {
			cell_t *newcell;
			// is there empty space on the other side of this wall segment?
			newcell = getcellindir(cell[i], d);
			if (newcell && !newcell->type->solid) {
				int doorcount;
				// if so, make sure there are no other adjacent doors
				doorcount = countadjcellswithflag(cell[i], F_DOOR, DT_ORTH);
				if (doorcount == 0) {
					// if there is only one way out of the adjacent empty cell, and
					// walls to either side of the potential door location, then
					// always add a door
					if ((countcellexits(newcell, DT_ORTH) == 1) && wallstoleftright(newcell, d)) {
						if (rnd(1,100) <= doorpct) {
							makedoor(cell[i], dooropenchance);
						} else {
							setcelltype(cell[i], getcellempty(cell[i]));
							cell[i]->isroomwall = compassdir(d);
							addflag(map->flags, F_ROOMEXIT, roomid, cell[i]->x, cell[i]->y, "from autodoors, only way out");
						}
					} else {
						// otherwise mark this as a _potential_ door location.
						poss[npossible] = cell[i];
						possdir[npossible] = d;
						npossible++;
					}
				}
			}
		}

		// if we have potential door locations, add one somewhere along this wall.
		if (npossible > 0) {
			int sel;
			sel = rnd(0,npossible-1);

			if (rnd(1,100) <= doorpct) {
				makedoor(poss[sel], dooropenchance);
			} else {
				setcelltype(poss[sel], getcellempty(poss[sel]));
				addflag(map->flags, F_ROOMEXIT, roomid, poss[sel]->x, poss[sel]->y, "from autodoors, potential location");
			}
			poss[sel]->isroomwall = compassdir(possdir[sel]);

			doorsadded++;
		}
	} // end foreach direction


	if (doorsadded == 0) {
		int i,d,used[MAXDIR_ORTH],poss[MAXDIR_ORTH];
		int dodoor[MAXDIR_ORTH];
		int ndodoors = 0;
		int ndoors,nposs = 0;

		int sel;
		//
		for (d = D_N; d <= D_W; d++) {
			used[d] = B_FALSE;
		}
		// no possible door locations - add a random number
		ndoors = rnd(1,4);

		for (i = 0; i < ndoors; i++) {
			// find a dir we haven't already used
			nposs = 0;
			for (d = D_N; d <= D_W; d++) {
				if (!used[d]) poss[nposs++] = d;
			}
			if (nposs <= 0) {
				break;
			}
			sel = rnd(0,nposs-1);
			used[poss[sel]] = B_TRUE; 
			dodoor[ndodoors] = poss[sel];
		}

		// actually make the doors
		for (i = 0; i < ndodoors; i++) {
			int sel;
			d = dodoor[i];
			getroomedge(map, roomid, minx, miny, maxx, maxy, d, cell, &ncells, B_TRUE);
			if (ncells) {
				sel = rnd(0,ncells-1);
				if (rnd(1,100) <= doorpct) {
					makedoor(cell[sel], dooropenchance);
					doorsadded++;
				} else {
					setcelltype(cell[sel], getcellempty(cell[sel]));
					addflag(map->flags, F_ROOMEXIT, roomid, cell[sel]->x, cell[sel]->y, "from autodoors, forced at end");
					doorsadded++;
				}
				cell[sel]->isroomwall = d;
			}
		}
	}
	if (db) dblog("autodoors() added %d doors to roomid %d", doorsadded, roomid);
	return doorsadded;
}


// change a wall into an empty cell, and add some rubble
void breakwall(cell_t *c) {
	celltype_t *origtype;
	int roomwall;
	origtype = c->type;
	roomwall = isroom(c);
	setcelltype(c, getcellempty(c));
	if (origtype->solid && roomwall && onein(2)) {
		switch (origtype->material->id) {
			case MT_STONE: addob(c->obpile, "1-30 stones"); break;
			case MT_GLASS: addob(c->obpile, "1-30 pieces of broken glass"); break;
			default: break;
		}
	}
}

int cellhaslos(cell_t *c1, cell_t *dest) {
        int deltax, deltay;
        int numpixels;
        int d;
        int dinc1,dinc2,xinc1,xinc2,yinc1,yinc2;
	int xinc,yinc,dinc;
        int i;
	int x1,y1;
        int x;
        int y;
	//int wentuphill = B_FALSE;
	//int origheight;
	//int shopwall;
	int x2,y2;
	map_t *map;

	if (c1 == dest) return B_TRUE;

	if (!dest) return B_FALSE;

	// let the player see when dead, otherwise the screen wil
	// go black when "You die" appears.
	map = c1->map;


	x1 = c1->x;
	y1 = c1->y;
	x2 = dest->x;
	y2 = dest->y;



        deltax = (x2 - x1);
        if (deltax < 0) deltax = -deltax;
        deltay = (y2 - y1);
        if (deltay < 0) deltay = -deltay;

	// can always see your own cell
	if ((deltax == 0) && (deltay == 0)) {
		return B_TRUE;
	} 

	if (deltax >= deltay) {
                numpixels = deltax + 1;
                d = (deltay*2) - deltax;
                dinc1 = deltay << 1;
                dinc2 = (deltay-deltax) << 1;
                xinc1 = 1;
                xinc2 = 1;
                yinc1 = 0;
                yinc2 = 1;
        } else {
                numpixels = deltay + 1;
                d = (deltax*2) - deltay;
                dinc1 = deltax << 1;
                dinc2 = (deltax - deltay) << 1;
                xinc1 = 0;
                xinc2 = 1;
                yinc1 = 1;
                yinc2 = 1;
        }

        if (x1 > x2) {
                xinc1 = - xinc1;
                xinc2 = - xinc2;
        }
        if (y1 > y2) {
                yinc1 = - yinc1;
                yinc2 = - yinc2;
        }

        x = x1; y = y1;

        for (i = 0; i < numpixels ; i++) {
		cell_t *cell;

		// don't need to move out of the last one
		if ((x == x2) && (y == y2)) {
			break;
		}

		if (d < 0) {
			xinc = xinc1;
			yinc = yinc1;
			dinc = dinc1;
		} else {
			xinc = xinc2;
			yinc = yinc2;
			dinc = dinc2;
		}


		// you can always see your own cell
		if (i != 0) {
			// solid cells stop los - but if you are standing on a solid
			// cell you can still see out.
			cell = getcellat(map, x, y);
			if (!cell->type->transparent) {
				return B_FALSE;
			}
			
			/*
			// check for smoke
			if ((x != x1) || (y != y1)) { // if not in first cell
				if (hasopaqueobject(viewer, x,y,z) && (getheight(x,y,z) >= origheight)) {
					if (!hasproplf(viewer, P_SEEINSMOKE)) {
						return B_FALSE;
					}
				}
			}
			*/

			// check for objects which block view
			if (hasobwithflag(cell->obpile, F_BLOCKSVIEW)) {
				return B_FALSE;
			}

		}

		// move to next cell
		d += dinc;
		x += xinc;
		y += yinc;
        }

	// made it to the target cell!
	return B_TRUE;
}

// is the given cell a wall of a vault with maintain_edge, and not marked as an exit?
int cellisfixedvaultwall(cell_t *c) {
	if (	getcellvault(c) && 
		c->type->solid && 
		hasflag(c->room->vault->flags, F_MAINTAINEDGE) && 
		!hasflagval(c->map->flags, F_ROOMEXIT, c->room->id, c->x, c->y, NULL) ) {
		return B_TRUE;
	}
	return B_FALSE;
}

int adjcellokforreachability(cell_t *c, int srcroomid, int dir, int wantfilled) {
	int proomid;
	proomid = getroomid(c);
	if ( ((srcroomid == -1) || (proomid != srcroomid)) && 
		cellwalkable(NULL, c, NULL) && !c->locked) {
		if ((proomid >= 0) && (c->isroomwall != diropposite(dir))) {
			// different room and hits wrong wall.
		} else if (cellisfixedvaultwall(c)) {
		} else {
			if (!wantfilled || c->filled) {
				return B_TRUE;
			}
		}
	}
	return B_FALSE;
}

// returns B_TRUE, B_FALSE or B_MAYBE
int cellokforreachability(cell_t *startcell, cell_t *c, int srcroomid, int dir, int wantfilled, int *insameroom) {
	int db = B_TRUE;
	if (c->locked) {
		// locked cell. invalied.
		if (insameroom) *insameroom = B_FALSE;
		if (db) dblog("   going %s hits locked cell. invalid.", getdirname(dir));
		return B_FALSE;
	} else if ((srcroomid >= 0) && (getroomid(c) == srcroomid) && c->type->solid && startcell->type->solid) { 
		// hits a wall of the same room,
		// and start cell NOT one inside the room.

		// invalid
		if (insameroom) *insameroom = B_TRUE;
		if (db) dblog("   going %s hits wall of same room. invalid.", getdirname(dir));
		return B_FALSE;
	} else if (isroom(c) && (getroomid(c) != srcroomid) && (c->isroomwall != diropposite(dir))) {
		// cell is in a different room, but not the correct edge
		// invalid
		if (insameroom) *insameroom = B_FALSE;
		if (db) dblog("   going %s hits wrong wall of different room. invalid.", getdirname(dir));
		return B_FALSE;
	} else if (cellisfixedvaultwall(c)) {
		// cell is a wall of a maintain_edge vault, and not an exit cell
		// invalid
		if (insameroom) *insameroom = B_FALSE;
		if (db) dblog("   going %s hits non-exit wall maintain_edge vault. invalid.", getdirname(dir));
		return B_FALSE;
	} else if (isroom(c) && (getroomid(c) != srcroomid) && c->type->solid && countadjdoors(c) ) {
		// cell is the wall of a different room, and adjacent to a door.
		// invalid
		if (insameroom) *insameroom = B_FALSE;
		if (db) dblog("   going %s hits wall adjacent to door. invalid.", getdirname(dir));
		return B_FALSE;
	} else if (cellwalkable(NULL, c, NULL)) {
		if (getroomid(c) == srcroomid) {
			// invalid
			if (insameroom) *insameroom = B_TRUE;
			if (db) dblog("   going %s hits empty cell of same room. invalid.", getdirname(dir));
			return B_FALSE;
		} else {
			if (!wantfilled || c->filled) {
				// walkable and not in this vault. finished.
				// valid.
				return B_TRUE;
			}
		}
	}
	return B_MAYBE;
}

void clearcell(cell_t *c) {
	// kill everything there - (lifeforms &&  objects)
	if (c->lf && !isplayer(c->lf)) {
		killlf(c->lf);
	}
	while (c->obpile->first) {
		killob(c->obpile->first);
	}
	if (gamemode == GM_GAMESTARTED) {
		c->known = B_FALSE;
		c->knownglyph.ch = ' ';
		c->knownglyph.colour = C_GREY;
	}
}
void clearcell_exceptflags(cell_t *c, ... ) {
	va_list args;
	enum FLAG exception[MAXCANDIDATES];
	int nexceptions = 0,i;
	object_t *o,*nexto;
	va_start(args, c);
	exception[nexceptions] = va_arg(args, enum FLAG);
	while (exception[nexceptions] != F_NONE) {
		nexceptions++;
		exception[nexceptions] = va_arg(args, enum FLAG);
	}
	va_end(args);
	assert(nexceptions < MAXCANDIDATES);

	if (c->lf && !isplayer(c->lf)) {
		killlf(c->lf);
	}

	for (o = c->obpile->first ; o ; o = nexto) {
		int exclude = B_FALSE;
		nexto = o->next;
		for (i = 0; i < nexceptions; i++) {
			if (hasflag(o->flags, exception[i])) {
				exclude = B_TRUE;
				break;
			}
		}
		if (!exclude) killob(o);
	}

	if (gamemode == GM_GAMESTARTED) {
		c->known = B_FALSE;
		c->knownglyph.ch = ' ';
		c->knownglyph.colour = C_GREY;
	}
}

int damagecell(cell_t *c, int amt, enum DAMTYPE damtype) {
	if (!c->type->solid) return B_TRUE;
	// adjust dam 
	adjustdammaterial(&amt, damtype, c->type->material->id);
	if (amt <= 0) return B_TRUE;

	// wall loses hp
	c->hp -= amt;
	if (c->hp <= 0) {
		char cellname[BUFLEN];
		int shattered = B_FALSE;
		enum MATERIAL cellmat;
		c->hp = 0;
		// remember cell properties
		sprintf(cellname, "%s %s", needan(c->type->name) ? "An" : "A", c->type->name);
		cellmat = c->type->material->id;
		// cell dies (have to do this before calling fragments())
		setcelltype(c, getcellempty(c));
		// announce
		if (haslos(player, c)) {
			msg("%s %s!", cellname, willshatter(cellmat) ? "shatters" : "is destroyed");
		}
		// shatter?
		if (willshatter(cellmat)) {
			char what[BUFLEN];
			shattered = B_TRUE;
			noise(c, NULL, NC_OTHER, SV_CAR, "something shattering.", NULL);
			if (getshardobname(cellmat, what)) {
				fragments(c, what, 3, 3); 
			}
		} else {
			switch (cellmat) {
				case MT_STONE:
					addob(c->obpile, "50-100 stones");
					break;
				default:
					break;
			}
		}
	}
	return B_FALSE;
}

// returns true if something happened
int doelementspread(cell_t *c) {
	float thisdepth;
	int i;
	int nsurround = 0;
	int db = B_FALSE;
	cell_t *surroundcell[8];
	object_t *fireob = NULL;

	if (!c || c->type->solid) { 
		return B_FALSE;
	}

	// calculate depth of this cell
	if (!hascloseddoor(c)) {
		thisdepth = getcellwaterdepth(c, NULL);

		if (thisdepth) {
			// count surrounding cells of lower depth
			for (i = DC_N; i <= DC_NW; i++) {
				cell_t *newc;

				newc = getcellindir(c, i);
				if (newc && !newc->type->solid && !hascloseddoor(newc)) {
					float newcdepth;
					int ok = B_FALSE;

					/* 
					FIX THIS CODE LATER
					if (newc->type->floorheight == c->type->floorheight) {
						// same height - don't include these???
						ok = B_FALSE;
						//ok = B_TRUE;
					} else if (newc->type->floorheight < c->type->floorheight) {
						// ie. downhill. don't include these 
						ok = B_FALSE;
					} else if (newc->type->floorheight > c->type->floorheight) {
						// ie. uphill. 
						ok = B_TRUE;
					}
					*/
					if (newc->type->floorheight == c->type->floorheight) {
						ok = B_TRUE;
					} else {
						ok = B_FALSE;
					}

					if (ok) {
						newcdepth = getcellwaterdepth(newc, NULL);

						if (newcdepth < thisdepth) {
							surroundcell[nsurround] = newc;
							nsurround++;
						}
					}
				}
			}

			
			// if there were any posisble cells around us
			if (nsurround) {
				float newdepth;

				//newdepth = thisdepth / (pctof(nsurround,50)+1);
				newdepth = thisdepth / (pctof(nsurround,55)+1);
				//newdepth = thisdepth / (nsurround+1);
				limitf(&newdepth,(float)DP_NONE, (float)DP_MAX);

				if (db) dblog("waterspread:  cell %d,%d (%d/%s) spreads to %d cells-->%d/%s",
					c->x, c->y, (int)thisdepth, getwaterdepthname((int)thisdepth),
					nsurround, (int)newdepth, getwaterdepthname((int)newdepth));

				// SET our cell to new depth
				setwaterdepth(c, (int)newdepth);

				// ADD water to surrounding cells
				for (i = 0; i < nsurround; i++) {
					cell_t *sc;
					flag_t *f;

					sc = surroundcell[i];
				
					f = hasflagval(sc->map->flags, F_NEWWATERDEPTH, sc->x, sc->y, NA, NULL);
					if (f) {
						f->val[2] += newdepth;
					} else {
						addflag(sc->map->flags, F_NEWWATERDEPTH, sc->x, sc->y, (int)newdepth, NULL);
					}
				}
			
				return B_TRUE;
			}
		}
	}
	// fire
	fireob = hasobofmaterial(c->obpile, MT_FIRE);
	if (fireob && (fireob->birthtime != curtime)) {
		cell_t *retcell[MAXRETCELLS];
		int nretcells,i,nspread = 0;
		
		// check adjacent cells for flammable stuff
		getradiuscells(c, 1, DT_COMPASS, B_FALSE, LOF_DONTNEED, B_FALSE, retcell, &nretcells, B_FALSE);
		for (i = 0; i < nretcells; i++) {
			object_t *oo;
			int celldone = B_FALSE;
			for (oo = retcell[i]->obpile->first ; oo ; oo = oo->next) {
				if (isflammable(oo) && !hasobofmaterial(retcell[i]->obpile, MT_FIRE)) {
					ignite(oo);
					// if object didn't ignite into a fire, add one.
					if (!hasobofmaterial(retcell[i]->obpile, MT_FIRE)) {
						addobfast(retcell[i]->obpile, fireob->type->id);
					}
					nspread++;
					celldone = B_TRUE;
				}
			}
			// lifeforms made out of something flammable?  ie. plants
			// don't include flesh even though it's technically flammable
			if (retcell[i]->lf && (retcell[i]->lf->material->id != MT_FLESH)) {
				if (!hasobofmaterial(retcell[i]->obpile, MT_FIRE)) {
					if (lfhasflag(retcell[i]->lf, F_FLAMMABLE)) {
						addobfast(retcell[i]->obpile, fireob->type->id);
						nspread++;
						celldone = B_TRUE;
					}
				}
			}
		}
	}
	return B_FALSE; 
}

int fix_reachability(map_t *m) {
	int i,keepgoing = B_TRUE, nfixed = 0;
	int db = B_TRUE;
	cell_t *c = NULL;

	if (db) dblog("fix_reachability starting.");

	switch (m->habitat->id) {
		case H_FOREST:
		case H_HEAVEN:
		case H_PIT:
		case H_VILLAGE:
			if (db) dblog("fix_reachability not required for this habitat.");
			return B_FALSE;
		default: break;
	}

	// find first non-empty cell
	for (i = 0; i < m->w * m->h; i++) {
		if (!m->cell[i]->type->solid) {
			c = m->cell[i];
			break;
		}
	}
	// no empty cells in map?
	if (!c) return B_FALSE;
	while (keepgoing) {
		keepgoing = B_FALSE;
		// mark all cells as non-filled
		for (i = 0; i < m->w * m->h; i++) {
			m->cell[i]->filled = FALSE;
		}
		// floodfill
		floodfill(c);
		// any remaining non-filled empty cells?
		for (i = 0; i < m->w * m->h; i++) {
			if (!m->cell[i]->type->solid && !m->cell[i]->filled) {
				vault_t *v;
				v = getcellvault(m->cell[i]);
				if (v && hasflag(v->flags, F_VAULTNOLINK)) {
					// don't need to link it.
				} else {
					int nadded = 0;
					// found an unreachable cell!  link it back to a filled cell.
					if (db) dblog("   found unreachable area at %d,%d.  will fix it.",
						m->cell[i]->x, m->cell[i]->y);

					if (linkexit(m->cell[i], B_TRUE, &nadded)) {
						// failed!
						if (db) dblog("   fix_reachability failed - couldn't fix an unreachable area.");
						return B_TRUE;
					}

					if (nadded) {
						if (db) dblog("   fixed unreachable area by adding %d cells.", nadded);
					} else {
						// didn't add anything - fail!
						if (db) dblog("   fix_reachability failed.");
						return B_TRUE;
					}
					
					// now run the test again.
					// 'c' will be where the next flood will will happen.
					keepgoing = B_TRUE;
					c = m->cell[i];
					nfixed++;
					break;
				}
			}
		}
	}
	if (db) dblog("   fix_reachability complete.  fixed %d unreachable areas.", nfixed);
	return B_FALSE;
}


void floodfill(cell_t *startcell) {
	int d;
	if (startcell && 			// not off the map
		!startcell->type->solid && 	// empty cell
		!startcell->filled) {		// not already filled
		startcell->filled = B_TRUE;
	} else {
		return;
	}
	for (d = DC_N; d <= DC_NW; d++) {
		floodfill(getcellindir(startcell, d)); // recursive call
	}
}

cell_t *getcellat(map_t *map, int x, int y) {
	if (!isonmap(map, x, y)) return NULL;
	return map->cell[y*map->w + x];
}

int getcellclimbdifficulty(cell_t *c) {
	int diff = 12;
	switch (c->type->material->id) {
		case MT_GLASS: diff = 26; break;
		case MT_DRAGONWOOD: diff = 20; break;
		case MT_METAL: diff = 20; break;
		case MT_STONE: diff = 15; break;
		case MT_WAX: diff = 10; break;
		case MT_WOOD: diff = 8; break;
		case MT_PLANT: diff = 8; break;
		default: diff = 12; break;
	}
	// modify for celltype
	switch (c->type->id) {
		case CT_WALLBRICK: diff -= 5; break;
		default: break;
	}
	limit(&diff, 0, NA);
	return diff;
}

int getcellclimbdifficultyavg(cell_t *c) {
	int d;
	int diff = 0;
	int nwalls = 0;
	
	for (d = DC_N; d <= DC_NW; d++) {
		cell_t *newcell;
		newcell = getcellindir(c, d);
		if (newcell && newcell->type->solid) {
			diff += getcellclimbdifficulty(newcell);
		} else {
			diff += 30; // ie. v.high
		}
		nwalls++;
	}
	diff /= nwalls;
	return diff;
}



int getcelldist(cell_t *src, cell_t *dst) {
	double xd,yd;
	// use pythag
	xd = abs(dst->x - src->x);
	yd = abs(dst->y - src->y);
	return (int)sqrt(xd*xd + yd*yd);
}

int getcelldistorth(cell_t *src, cell_t *dst) { // add x/y
	return abs(dst->x - src->x) + abs(dst->y - src->y);
}

//populates 'g' with the contects of cell 'c', as seen by 'viewer'
// if we don't have LOS to there, set g->ch to NUL.
void getcellglyph(glyph_t *g, cell_t *c, lifeform_t *viewer) {
	glyph_t tempgl;

	// default
	g->ch = ' ';
	g->colour = C_RED;

	if (haslos(viewer, c)) {
		// show cell contents
		if (c->lf && cansee(viewer, c->lf)) { // lifeform here which we can see
			// draw the lf's race glyph
			*g = *(getlfglyph(c->lf));
			if (isprone(c->lf)) {
				g->ch = flip(g->ch);
			}
			if (lfhasflag(c->lf, F_FROZEN)) {
				g->colour = C_CYAN;
			}
			return;
		} else { // we can see the floor here
			void *thing;
			// scanned lf here?
			if (isinscanrange(c, &thing, NULL, &tempgl) == TT_MONSTER) {
				*g = tempgl;
				//mvwprintw(gamewin, y-viewy, x-viewx, "%c", glyph);
				//drawglyph(&glyph, x, y);
				return;
			}
			// otherwise fall through
		}

		// objects here?
		if ((countobs(c->obpile, B_FALSE) > 0)) {
			object_t *o;

			// draw highest object in sort order
			o = gettopobject(c, B_TRUE);
			if (o && !hasflag(o->flags, F_NOGLYPH)) {
				// return the object's glyph
				*g = *(getglyph(o));
			} else {
				// objects here, but we can't see them. draw the cell.
				*g = c->type->glyph;
				adjustcellglyphforlight(c, g);
			}
		} else {
			// draw cell normally
			//drawcell(cell, x, y);
			*g = c->type->glyph;
			adjustcellglyphforlight(c, g);
		}
	} else { // can't see the cell
		void *thing;
		//drawscannedcell(cell, x-viewx, y-viewy);
		switch (isinscanrange(c, &thing, NULL, &tempgl)) {
			case TT_MONSTER:
			case TT_OBJECT:
				*g = tempgl;
				break;
			default:
				if (c->known) {
					// copy from cell
					/*
					*g = c->type->glyph;
					*/
					*g = c->knownglyph;
					if (g->ch == '.') {
						g->ch = ' ';
					}
					// out of LOS - show as dark 
					// TODO: if terminal supports it, use C_GREY instead.
					g->colour = C_BLUE;
				}
				break;
		}
	}
}

enum CELLTYPE getcellempty(cell_t *c) {
	flag_t *f;
	if (c->habitat == c->map->habitat) {
		f = hasflag(c->map->flags, F_CELLTYPEEMPTY);
		if (f) return f->val[0];
	} 
	return c->habitat->emptycelltype;
}

enum CELLTYPE getcellsolid(cell_t *c) {
	flag_t *f;
	if (c->habitat == c->map->habitat) {
		f = hasflag(c->map->flags, F_CELLTYPESOLID);
		if (f) return f->val[0];
	} 
	return c->habitat->solidcelltype;
}

enum CELLTYPE getmapempty(map_t *m) {
	flag_t *f;
	f = hasflag(m->flags, F_CELLTYPEEMPTY);
	if (f) return f->val[0];
	return m->habitat->emptycelltype;
}

enum CELLTYPE getmapsolid(map_t *m) {
	flag_t *f;
	f = hasflag(m->flags, F_CELLTYPESOLID);
	if (f) return f->val[0];
	return m->habitat->solidcelltype;
}

enum DEPTH getcellwaterdepth(cell_t *c, lifeform_t *lf) {
	object_t *o;
	o = hasobwithflag(c->obpile, F_DEEPWATER);
	if (o) {
		return getobdepth(o, lf);
	}
	return DP_NONE;
}


// returns the closest cell next to 'dst', when coming from 'src'
// ie. if you start walking from src to dst, where will you end up?
cell_t *get_closest_adjcell(cell_t *src, cell_t *dst) {
	cell_t *retcell[MAXRETCELLS];
	int nretcell,i;
	calcbresnham(src->map, src->x, src->y, dst->x, dst->y, retcell, &nretcell);
	for (i = 1; i < nretcell; i++) {
		if (retcell[i] == dst) {
			return retcell[i-1];
		}
	}
	return NULL;
}

int getdoorlockdiff(int depth) {
	return 19 + depth;
}
int getdoorsecretdiff(int depth) {
	return 20 + (depth / 2);
}

flag_t *getmapcoords(map_t *m, int *x, int *y) {
	flag_t *f;
	f = hasflag(m->flags, F_MAPCOORDS);
	if (f) {
		if (x) *x = f->val[0];
		if (y) *y = f->val[1];
		return f;
	}
	if (x) *x = -999;
	if (y) *y = -999;
	return NULL;
}


int getmapdifficulty(map_t *m) {
	int diff = 1;

	if (m) {
		if (isoutdoors(m)) {
			int x,y;
			// depth is distance from 0,0
			getmapcoords(m, &x, &y);
			diff = (abs(x) + abs(y))+1;
		} else {
			diff = m->depth;
		}
		if (m->region) {
			diff += m->region->rtype->depthmod;
			diff += m->region->depthmod;
		}
	} else {
		diff = rnd(1,MAXDEPTH);
	}
	return diff;
}


// forglyph will be true if we are using this function for the purpose
// of figuring out which glyph to draw
object_t *gettopobject(cell_t *where, int forglyph) {
	object_t *o,*oo = NULL;
	enum LFSIZE largest = SZ_MINI;
	int c;

	// get largest known impassable object first
	for (o = where->obpile->first ; o ; o = o->next) {
		flag_t *f;
		// ignore hidden traps, but not secret doors
		if (isdeadob(o)) {
		} else if (hasflag(o->flags, F_SECRET) && !isdoor(o, NULL)) {
		} else if (hasflag(o->flags, F_INVISOB)) {
		} else if (hasflag(o->flags, F_TRAIL) && !canseeob(player, o)) {
		} else if (forglyph && hasflag(o->flags, F_NOGLYPH)) {
		} else {
			f = hasflag(o->flags, F_IMPASSABLE);
			if (f && (f->val[1] > largest)) {
				largest = f->val[1];
				oo = o;
			}
		}
	}
	if (oo) {
		return oo;
	}

	// otherwise draw highest object in sort order
	c = 0;
	while (sortorder[c] != OC_NULL) {
		// check each object against this ob class
		// count backwards so more recently dropped objects
		// appear first.
		for (o = where->obpile->last ; o ; o = o->prev) {
			if (o->type->obclass->id == sortorder[c]) {
				if (isdeadob(o)) {
				} else if (hasflag(o->flags, F_SECRET)) {
				} else if (hasflag(o->flags, F_INVISOB)) {
				} else if (hasflag(o->flags, F_TRAIL) && !canseeob(player, o)) {
				} else if (forglyph && hasflag(o->flags, F_NOGLYPH)) {
				} else {
					return o;
				}
			}
		}
		c++;
	}
	return NULL;
}

void calclight(map_t *map) {
	int x,y;
	cell_t *c;
	int i;

	// disable screen redraws
	noredraw = B_TRUE;

	// remember lit values for cells in player's los
	if (gamemode == GM_GAMESTARTED) {
		for (i = 0; i < player->nlos; i++) {
			player->los[i]->lastlit = player->los[i]->lit;
		}
	}
	
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			c = getcellat(map, x,y);
			//if (c && (c->lit == L_PERMLIGHT) && (c->lit != L_PERMDARK)) c->lit = B_FALSE;
			c->lastlit = c->lit;
			if (c && (c->lit != L_PERMLIGHT) && (c->lit != L_PERMDARK)) c->lit = B_FALSE;
		}
	}
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			c = getcellat(map, x,y);
			if (c) {
				int radius;
				object_t *o;

				// lit based on depth
				if (isoutdoors(map)) {
					int hours,mins,secs;
					splittime(&hours,&mins,&secs);
					if (isnighttime()) {
						// ie. nighttime, after 7pm or before 5am
					} else {
						// ie. daytime
						makelit(c, L_PERMLIGHT, -1);
					}
				} else {
					//if ((map->depth <= 5) && (c->lit != L_PERMDARK)) {
					if ((map->illumination == IL_FULLLIT)  && (c->lit != L_PERMDARK)) {
						makelit(c, L_PERMLIGHT, -1);
					}
				}

				// TODO: has dark producing lf?
				// TODO: has dark producing object?

				// has lightproducing lf? (ie.hasflag f_produceslight)
				if (c->lf) {
					radius = lfproduceslight(c->lf);
					if (radius) {
						makelitradius(c, radius, L_TEMP, -1);
					}
				}
				// has light-producing object on ground?
				for (o = c->obpile->first ; o ; o = o->next) {
					radius = obproduceslight(o);
					if (radius) {
						makelitradius(c, radius, L_TEMP, -1);
					}
				}
				
			}
		}
	}

	// re-enable screen redraws
	noredraw = B_FALSE;

	// did any lit values within player's los change?
	if (gamemode == GM_GAMESTARTED) {
		int dolos = B_FALSE;
		if (!isblind(player)) {
			for (i = 0; i < player->nlos; i++) {
				if (player->los[i]->lastlit != player->los[i]->lit) {
					dolos = B_TRUE;
					break;
				}
			}
		}
		if (dolos) {
			setlosdirty(player);
		}
	}


}

int calcroompos(map_t *map, int w, int h, int xmargin, int ymargin, int *bx, int *by, int force) {
	int x,y,i;
	int bestscore = 9888;
	coord_t coord[MAX_MAPW*MAX_MAPH];
	int coordscore[MAX_MAPW*MAX_MAPH];
	int ncoords = 0;
	coord_t poss[MAX_MAPW*MAX_MAPH];
	int nposs = 0;
	cell_t *cell;
	int sel;
	int db = B_FALSE;
	int foundvalid = B_FALSE;

	// init coords list
	for (y = 1 + ymargin; y < (map->h - ymargin); y++) {
		for (x = 1 + xmargin; x < (map->w - xmargin); x++) {
			coord[ncoords].x = x;
			coord[ncoords].y = y;
			ncoords++;
		}
	}

	// try placing room at all positions
	for (i = 0; i < ncoords; i++) {
		int score = 9999;
		x = coord[i].x;
		y = coord[i].y;
		// would the room fit here?
		if ( ((x + w) <= (map->w - xmargin)) && 
		     ((y + h) <= (map->h - ymargin))) { 
			int valid = B_TRUE;
			int rx,ry;
			score = 0;
			// calculate score if we placed the room with its top left corner here.
			for (ry = y; (ry < y+h) && valid; ry++) {
				for (rx = x; (rx < x+w) && valid; rx++) {
					int includethiscell = B_FALSE;
					cell = getcellat(map, rx,ry);

					// NEVER create a room whcih will:
					// - be on top of the player (normally this can't happen, 
					//   but debugging via 'create vault' could do it)
					if (cell->lf && isplayer(cell->lf)) { 
						valid = B_FALSE;
					}
					// - be on top of an existing staircase
					if (hasobwithflag(cell->obpile, F_CLIMBABLE)) {
						valid = B_FALSE;
					}
					/*
					// - overlap the inside of an existing room
					if (cellwalkable(NULL, cell, NULL) && isroom(cell)) {
						valid = B_FALSE;
					}
					// - overlap any part of an existing vault
					if (cell->room && cell->room->vault) {
						valid = B_FALSE;
					}
					*/
					// - overlap any part of an existing room/vault
					if (cell->room) {
						valid = B_FALSE;
					}
					// - overlap a 'locked' cell
					if (cell->locked) {
						valid = B_FALSE;
					}

					// is this cell adjacent to an empty cell and not a
					// corner (ie. a valid door location)
					if (countcellexits(cell, DT_ORTH)) {
						score++;
						if ( ((ry == y) && (rx == x))  ||
						     ((ry == y) && (rx == (x+w-1)))  ||
						     ((ry == y+h-1) && (rx == x))  ||
						     ((ry == y+h-1) && (rx == (x+w-1))) ) {
							// corner. don't check this cell for scores.
						} else {
							includethiscell = B_TRUE;	
						}
					} else {
						// not adjacent to any empty cells. ok.
						includethiscell = B_TRUE;	
					}
					if (includethiscell) {
						// is this cell empty itself?
						if (!cell->type->solid) score += 3;
						// avoid being adjacent to other room walls
						if (countcellexits(cell, DT_ORTH)) score++;

						score += (countadjrooms(cell)*3);

						// overlapping another room?
						if (isroom(cell)) {
							if (force) {
								score += 10;
							} else {
								valid = B_FALSE;
							}
						}
					}
				}
			}
			if (valid) {
				if (score < bestscore) {
					if (db) dblog("new best score: %d (topleft at %d,%d)",score,x,y);
					bestscore = score;
					foundvalid = B_TRUE;
				}
			} else {
				score = 9999;
			}
		} else {
			if (db) dblog("cell %d,%d - a %dx%d room would not fit here",x,y,w,h);
		}
		coordscore[i] = score;
		if (db) dblog("topleft at %d,%d => score %d",x,y,score);
	}

	if (foundvalid) {
		// now go through and make a list of all BEST positions 
		nposs = 0;
		assert(bestscore != 9888);
		for (i = 0; i < ncoords; i++) {
			if (coordscore[i] == bestscore) {
				poss[nposs++] = coord[i];
			}
		}
	} else {
		nposs = 0;
	}

	if (nposs == 0) {
		if (db) dblog("calcroompos - zero possibilities!");
		*bx = -1;
		*by = -1;
		return B_TRUE;
	} else {
		// pick a random one
		sel = rnd(0,nposs-1);
		if (db) dblog("calcroompos - %d possibilities (bestscore=%d), selected #%d.", nposs, bestscore, sel);

		*bx = poss[sel].x;
		*by = poss[sel].y;
	}

	return B_FALSE;
}

int countadjcellswithflag(cell_t *cell, enum FLAG fid, int dirtype) {
	int d;
	int count = 0;
	int start, end;
	cell_t *newcell;
	if (dirtype == DT_ORTH) {
		start = D_N;
		end = D_W;
	} else {
		start = DC_N;
		end = DC_NW;
	}
	for (d = start; d <= end; d++) {
		newcell = getcellindir(cell, d);
		if (newcell && hasobwithflag(newcell->obpile, fid)) {
			count++;
		}
	}
	return count;
}

int countadjcellsoftype(cell_t *cell, int id) {
	int d;
	int count = 0;
	cell_t *newcell;
	for (d = D_N; d < MAXDIR_ORTH; d++) {
		newcell = getcellindir(cell, d);
		if (newcell && newcell->type->id == id) {
			count++;
		}
	}
	return count;
}

int countadjrooms(cell_t *cell) {
	int d;
	int count = 0;
	cell_t *newcell;
	for (d = D_N; d < MAXDIR_ORTH; d++) {
		newcell = getcellindir(cell, d);
		if (newcell && isroom(newcell)) {
			count++;
		}
	}
	return count;
}

int countadjdoors(cell_t *cell) {
	int d;
	int doors = 0;
	
	for (d = DC_N; d <= DC_NW; d++) {
		cell_t *newcell;
		newcell = getcellindir(cell, d);
		if (newcell || hasobwithflag(newcell->obpile, F_DOOR)) {
			doors++;
		}
	}
	return doors;
}

int countadjwalls(cell_t *cell) {
	int d;
	int walls = 0;
	
	for (d = DC_N; d <= DC_NW; d++) {
		cell_t *newcell;
		newcell = getcellindir(cell, d);
		if (!newcell || newcell->type->solid) {
			walls++;
		}
	}
	return walls;
}

int countcellexits(cell_t *cell, int dirtype) {
	int d;
	int exits = 0;
	int start,end;
	cell_t *newcell;
	assert(cell);
	if (dirtype == DT_ORTH) {
		start = D_N;
		end = D_W;
	} else { // ie. dt_compass
		start = DC_N;
		end = DC_NW;
	}
	
	for (d = start; d <= end; d++) {
		newcell = getcellindir(cell, d);
		if (newcell && !newcell->type->solid) {
			exits++;
		}
	}
	return exits;
}

int countcellexitsfor(lifeform_t *lf) {
	int d;
	int exits = 0;
	assert(lf);
	for (d = DC_N; d <= DC_NW; d++) {
		if (moveclear(lf, d, NULL)) {
			exits++;
		}
	}
	return exits;
}

int countlfs(map_t *map) {
	lifeform_t *lf;
	int count = 0;
	for (lf = map->lf ; lf ; lf = lf->next) {
		count++;
	}
	return count;
}

int countmapobs(map_t *m, enum OBTYPE oid) {
	cell_t *c;
	int count = 0,x,y;

	for (y = 0; y < m->h; y++) {
		for (x = 0; x < m->w; x++) {
			c = getcellat(m, x, y);
			if (c) {
				count += countobsoftype(c->obpile, oid);
			}
		}
	}
	return count;
}

int countmapobswithflag(map_t *m, enum FLAG flagid) {
	cell_t *c;
	int count = 0,x,y;

	for (y = 0; y < m->h; y++) {
		for (x = 0; x < m->w; x++) {
			c = getcellat(m, x, y);
			if (c) {
				count += countobswithflag(c->obpile, flagid);
			}
		}
	}
	return count;
}

int countmapobswithflagval(map_t *m, enum FLAG flagid, int val0, int val1, int val2, char *text) {
	cell_t *c;
	int count = 0,x,y;

	for (y = 0; y < m->h; y++) {
		for (x = 0; x < m->w; x++) {
			c = getcellat(m, x, y);
			if (c) {
				count += countobswithflagval(c->obpile, flagid, val0, val1, val2, text);
			}
		}
	}
	return count;
}

int countstairs(map_t *m, int dir) {
	int count;
	count = countmapobswithflagval(m, F_CLIMBABLE, dir, NA, NA, NULL);
	// don't include pits
	count -= countmapobswithflagval(m, F_PIT, dir, NA, NA, NULL);
	return count;
}

void createcave(map_t *map, int depth, map_t *parentmap, int exitdir, object_t *entryob) {
	int wantrooms = B_TRUE;
	int x,y,i;
	int numrooms = 0;
	cell_t *c;
	//int entrylinked = B_FALSE;
	//object_t *o;
	//int db = B_TRUE;
	enum CELLTYPE emptycell,solidcell;

	// parameters
	int minrooms = 0;
	int maxrooms = 3;
	int numstartpos = 5;
	int numpasses = 50;

	
	// fill entire maze with walls
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			addcell(map, x, y);
		}
	}


	// is the map lit?
	if (depth == 1) {
		map->illumination = IL_FULLLIT;
	} else {
		int darkchance;
		darkchance = depth*15; // ie. level 2 = 30% chance of being dark, level 6 = 90% chance
		if (pctchance(darkchance)) {
			map->illumination = IL_FULLDARK;
		} else {
			map->illumination = IL_FULLLIT;
		}
	}

	// what kind of cells will 'empty' ones be?
	emptycell = getmapempty(map);
	solidcell = getmapsolid(map);

	// pick initial random points 
	for (i = 0; i < numstartpos; i++) {
		c = getrandomcell(map);
		setcelltype(c, emptycell);
	}

	expand_cave(map, numpasses);

	// adjust min/maxrooms based on fixed vaults
	minrooms -= map->nfixedrooms;
	maxrooms -= map->nfixedrooms;
	limit(&minrooms, 0, NA);
	limit(&maxrooms, 0, NA);

	// create rooms
	if (wantrooms && (maxrooms > 0)) {
		numrooms = rnd(minrooms, maxrooms);

		for (i = 0; i < numrooms; i++) {
			// maybe make it a special room
			if (rnd(1,100) <= map->habitat->randvaultpct) {
				vault_t *v;
				v = getvaulttype(map);
				if (!createvault(map, map->nrooms, v, NULL, NULL, NULL, NULL)) {
					// success
					continue;
				} 
			}
			// just do a normal room
			calcposandmakeroom(map, map->nrooms, NA, NA, DEF_VAULTMARGIN, DEF_VAULTMARGIN, NULL, NULL, NULL, NULL, 50, B_FALSE);
			//roomvault[i] = B_FALSE;
		}
	}

	// link up room exits
	/*
	for (i = 0; i < map->nrooms; i++) {
		int wantlink = B_FALSE;
		if (!map->room[i].exitslinked) {
			if (map->room[i].vault && hasflag(map->room[i].vault->flags, F_VAULTNOLINK)) {
			} else {
				wantlink = B_TRUE;
			}
		}
		if (wantlink) {
			linkexits(map, map->room[i].id);
		}
	}
	*/

	// now do a border
	y = 0;
	for (x = 0; x < map->w; x++) {
		// n
		c = getcellat(map, x, 0);
		clearcell(c);
		setcelltype(c,solidcell);
		c->locked = B_TRUE;
		// s
		c = getcellat(map, x, map->h-1);
		clearcell(c);
		setcelltype(c,solidcell);
		c->locked = B_TRUE;
	}
	for (y = 1; y < map->h-1; y++) {
		// w
		c = getcellat(map, 0, y);
		clearcell(c);
		setcelltype(c,solidcell);
		c->locked = B_TRUE;
		// e
		c = getcellat(map, map->w-1, y);
		clearcell(c);
		setcelltype(c,solidcell);
		c->locked = B_TRUE;
	}
}
// 
void createdungeon(map_t *map, int depth, map_t *parentmap, int exitdir, object_t *entryob) {
	int wantrooms = B_TRUE;
	int d;
	int x,y,w,h;
	enum MAPSHAPE shape = MS_NORMAL;
	int i;
	int done,unused;
	int dir;
	int lastdir;
	int numrooms = 0;
	cell_t *c,*centre;
	//object_t *o;
	int db = B_TRUE;
	int digdb = B_FALSE;

	// parameters
	int turnpct = DEF_TURNPCT;
	int sparseness = DEF_SPARSENESS;
	int looppct = DEF_LOOPPCT;
	int minrooms = MINROOMS;
	int maxrooms = MAXROOMS;
	enum CORRIDORTYPE corridortype = CDT_NORMAL;

	int moved = 0;

	enum CELLTYPE emptycell,solidcell;
	char buf[BUFLEN];
	
	// fill entire maze with walls
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			addcell(map, x, y);
		}
	}

	// select dungeon shape.
	if (onein(3)) {
		shape = rnd(0,MAXMAPSHAPES-1);
	} else {
		shape = MS_NORMAL;
	}
	switch (shape) {
		case MS_NORMAL:// normal
			break;
		case MS_CROSS: // cross
			// ##  ##
			// ##  ##
			//      
			// ##  ##
			// ##  ##
			for (y = 0; y < map->h/3; y++) {
				for (x = 0; x < map->w/3; x++) {
					c = getcellat(map, x, y); c->locked = B_TRUE;
				}
				for (x = map->w - (map->w/3); x < map->w; x++) {
					c = getcellat(map, x, y); c->locked = B_TRUE;
				}
			}
			for (y = map->h-(map->h/3); y < map->h; y++) {
				for (x = 0; x < map->w/3; x++) {
					c = getcellat(map, x, y); c->locked = B_TRUE;
				}
				for (x = map->w - (map->w/3); x < map->w; x++) {
					c = getcellat(map, x, y); c->locked = B_TRUE;
				}
			}
			break;
		case MS_TURRET: // kind of a reverse cross
			// ##########
			// #        #
			// #   ##   #
			// # ###### #
			// # ###### #
			// # ###### #
			// #   ##   #
			// #        #
			// ##########
			for (y = (map->h/4); y < map->h/3; y++) {
				for (x = map->w/3; x < map->w - (map->w/3); x++) {
					c = getcellat(map, x, y); c->locked = B_TRUE;
				}
			}
			for (y = map->h/3; y < map->h - (map->h/3); y++) {
				for (x = map->w/4; x < map->w - (map->w/4); x++) {
					c = getcellat(map, x, y); c->locked = B_TRUE;
				}
			}
			for (y = map->h-(map->h/3); y < map->h - (map->h/4); y++) {
				for (x = map->w/3; x < map->w - (map->w/3); x++) {
					c = getcellat(map, x, y); c->locked = B_TRUE;
				}
			}
			break;
		case MS_CIRCLE: // circle / ellipse
			centre = getcellat(map, map->w/2, map->h/2);
			w = map->w - 5;
			h = map->h - 4;
			for (y = 0; y < map->h; y++) {
				for (x = 0; x < map->w; x++) {
					float val;
					val = 	(pow(x - centre->x, 2) / pow(w/2, 2)) + 
						(pow(y - centre->y, 2) / pow(h/2, 2));
					if (val > 1) {
						c = getcellat(map, x, y); 
						c->locked = B_TRUE; 
					}
				}
			}
			break;
	}
	addflag(map->flags, F_MAPSHAPE, shape, NA, NA, NULL);

	for (y = 0; y < map->h; y++) {
		strcpy(buf, "");
		for (x = 0; x < map->w; x++) {
			c = getcellat(map, x, y); 
			if (c->locked) {
				c->visited = B_TRUE;
			}
			if (c->locked) {
				strcat(buf, "X");
			} else {
				strcat(buf, " ");
			}
		}
		dblog("%s",buf);
	}

	// randomise dungeon parameters
	turnpct += (rnd(0,40)-20); //  (-20 to +20)% 
	sparseness += (rnd(0,20)-10); //  -10 to +10
	looppct -= (rnd(0,10)); // subtrace 0 - 10

	if (shape == MS_NORMAL) {
		if (onein(2)) {
			corridortype = CDT_SIMPLE;
		}
	}


	// is the map lit?
	if (depth <= 5) {
		map->illumination = IL_FULLLIT;
	} else {
		int chance;
		chance = (depth - 5) * 10;
		if (pctchance(chance)) {
			map->illumination = rnd(IL_WELLLIT,IL_FULLDARK);
		} else {
			map->illumination = IL_FULLLIT;
		}
	}

	// random chance of different wall type

	if (onein(6)) {
		switch (rnd(1,3)) {
			case 1:
				addflag(map->flags, F_CELLTYPESOLID, CT_WALLBRICK, NA, NA, NULL);
				break;
			case 2:
				addflag(map->flags, F_CELLTYPESOLID, CT_WALLMETAL, NA, NA, NULL);
				break;
			case 3:
				addflag(map->flags, F_CELLTYPESOLID, CT_WALLWOOD, NA, NA, NULL);
				break;
		}
	}
	// random chance of different floor type
	if (onein(6)) {
		switch (rnd(1,3)) {
			case 1:
				addflag(map->flags, F_CELLTYPEEMPTY, CT_FLOORCARPET, NA, NA, NULL);
				break;
			case 2:
				addflag(map->flags, F_CELLTYPEEMPTY, CT_FLOORTILE, NA, NA, NULL);
				break;
			case 3:
				addflag(map->flags, F_CELLTYPEEMPTY, CT_FLOORWOOD, NA, NA, NULL);
				break;
		}
	}


	// what kind of cells will 'empty' ones be?
	emptycell = getmapempty(map);
	//solidcell = map->habitat->solidcelltype;
	solidcell = getmapsolid(map);

	// pick initial random spot 
	if (corridortype == CDT_NORMAL) {
		c = getrandomcell(map);
		setcelltype(c, emptycell);
		c->visited = B_TRUE;
		if (digdb) printf("- Starting (%d,%d)\n",c->x, c->y);

		lastdir = D_UNKNOWN;
		done = B_FALSE;

		dir = D_NONE;

		while (!done) {
			// get random direction based on turnpct
			dir = D_NONE;
			while ((dir == D_NONE) && !done) {	
				int badcount;
				if (digdb) printf("- At (%d,%d), moved %d, finding new direction...\n",c->x, c->y, moved);
			
				dir = getnewdigdir(c, lastdir, (moved < 2) ? 0 : turnpct, &moved);

				badcount = 0;
				while (dir == D_NONE) {
					badcount++;
					if (badcount > 10) {
						// finish!
						done = B_TRUE;
						break;
					}
					
					// pick new EMPTY random spot
					c = getrandomcell(map);
					while (!isempty(c)) {
						c = getrandomcell(map);
					}
					if (digdb) printf("--- Couldn't find a valid direction.  Jumped to (%d,%d).\n",c->x, c->y);
					// pick a new random dir
					dir = getnewdigdir(c, lastdir, turnpct, &moved);
				}
				if (!done) {
					if (digdb) printf("- Digging %s from (%d,%d).\n",getdirname(dir),c->x, c->y);
				}
			}

			if (!done) {
				// move to adjacent cell in the given direction
				c = getcellindir(c, dir);
				if (digdb) printf("- Now at (%d,%d)\n",c->x, c->y);
				moved++;
				
				// blank it
				setcelltype(c,emptycell);
				c->visited = B_TRUE;
				// mark surrounding cells as visited
				for (d = DC_N; d < MAXDIR_COMPASS; d++) {
					cell_t *thiscell;
					thiscell = getcellindir(c, d);
					if (thiscell) {
						if (digdb) printf("* Marking surrounding cell in dir %d (%d,%d) as visited.\n",d, thiscell->x, thiscell->y);
						thiscell->visited = B_TRUE;
					}
				}
				// remember last direction
				lastdir = dir;

				// check if we have visited all valid cells
				unused = 0;
				for (y = 0; y < map->h; y++) {
					for (x = 0; x < map->w; x++) {
						cell_t *thiscell;
						thiscell = getcellat(map, x, y);
						if (!thiscell->visited) {
							unused++;
						}
					}
				}

				if (!unused) {
					done = B_TRUE;
				}
			}

			if (digdb) dblog("%d unused cell(s)\n",unused);
			//dumpmap(map);
			//getchar();

		}

		// use sparseness to cut down dead ends
		remove_deadends(map, sparseness);

		// introduce loops
		for (y = 0; y < map->h; y++) {
			for (x = 0; x < map->w; x++) {
				c = getcellat(map, x, y);
				if (!c->type->solid && countcellexits(c, DT_ORTH) == 1) {
					// dead end - maybe make loop from here
					if (rnd(1,100) <= looppct) {
						int connected = B_FALSE;
						int loopok = B_TRUE;
						int dir;

						// pick a random directory
						dir = getnewdigdir(c, D_UNKNOWN,100, &moved);
					
						if (dir == D_NONE) {	
							// can't make a loop from here.
							loopok = B_FALSE;
						} else { 
							int tries = 0;
							// if we go this dir, will we hit a 
							// corridor?
							while (!isloopdirok(c, dir)) {
								tries++;
								// tried every direction?
								if (tries >= MAXDIR_ORTH) {
									loopok = B_FALSE;
									break;
								}
								// turn... 
								if (++dir >= MAXDIR_ORTH) {
									dir = 0;
								}
							}
						}

						if (loopok) {
							// keep digging until we hit another corridor
							while (!connected) { 
								cell_t *newcell;
								// find adjacent cell in the given direction
								newcell = getcellindir(c, dir);
								if (!newcell) {
									connected = B_TRUE;
								} else {
									// have we hit another corridor yet?
									if (!newcell->type->solid) {
										connected = B_TRUE;
									} else {
										// blank adjacent cell
										setcelltype(newcell, emptycell);
										newcell->visited = B_TRUE;
									}
									c = newcell;
								}
							}
						}
					}
				}
			}
		}
	}

	// adjust min/maxrooms based on fixed vaults
	minrooms -= map->nfixedrooms;
	maxrooms -= map->nfixedrooms;
	limit(&minrooms, 0, NA);
	limit(&maxrooms, 0, NA);

	// create rooms
	if (wantrooms && (maxrooms > 0)) {
		numrooms = rnd(minrooms, maxrooms);

		//printf("using %d rooms\n",numrooms);
		//dblog("Adding %d rooms...\n",numrooms);
		for (i = 0; i < numrooms; i++) {
			// maybe make it a special room
			//roomvault[i] = NULL;
			if (rnd(1,100) <= map->habitat->randvaultpct) {
				vault_t *v;
				v = getvaulttype(map);
				if (!createvault(map, map->nrooms, v, NULL, NULL, NULL, NULL)) {
					// success
					continue;
				} 
			}
			// just do a normal room
			calcposandmakeroom(map, map->nrooms, NA, NA, DEF_VAULTMARGIN, DEF_VAULTMARGIN, NULL, NULL, NULL, NULL, 50, B_FALSE);
			//roomvault[i] = B_FALSE;
		}
	}

	if (corridortype == CDT_NORMAL) {
		// now clear up dead ends again.
		remove_deadends(map, sparseness);
	}

	// link up room exits
	for (i = 0; i < map->nrooms; i++) {
		int wantlink = B_FALSE;
		if (!map->room[i].exitslinked) {
			if (map->room[i].vault && hasflag(map->room[i].vault->flags, F_VAULTNOLINK)) {
			} else {
				wantlink = B_TRUE;
			}
		}
		if (wantlink) {
			linkexits(map, map->room[i].id);
		}
	}

	// add pillars & objects & monsters to rooms
	if (wantrooms && (numrooms > 0)) {
		for (i = 0; i < map->nrooms; i++) {
			if (!map->room[i].vault || hasflag(map->room[i].vault->flags, F_AUTOPOPULATE)) {
				int numobsmin,numobsmax,numobs,n;
				int maxpillars;
				int rw,rh;

				rw = map->room[i].x2 - map->room[i].x1;
				rh = map->room[i].y2 - map->room[i].y1;

				//dblog("Adding obs to room %d/%d",i+1,numrooms);
				maxpillars = (rw / 4) + (rh / 4);
				// add pillars first
				if ((maxpillars > 0) && pctchance(PCTCH_PILLAR)) {
					int n;
					int numpillars;
					numpillars = rnd(1,maxpillars);
					if (db) dblog("--> Will add %d pillars",numpillars);
					for (n = 0; n < numpillars;n++ ) {
						//dblog("----> Adding pillar %d/%d",n+1,numpillars);
						c = getrandomroomcell(map, i);

						if (c && isempty(c)  && !countobs(c->obpile, B_TRUE)) {
							setcelltype(c, solidcell);
						}
					}
				}

				numobsmin = 0;
				numobsmax = MAXOF(rw,rh) / 2;
				//numobsmax = MAXOF(roomw[i],roomh[i]);
		
				// then objects/monsters
				if (numobsmax <= numobsmin) {
					numobs = numobsmin;
				} else {
					numobs = rnd(numobsmin,numobsmax);
				}
				if (db) dblog("--> Will add %d objects to room %d (of %d)",numobs,i,numrooms);
				for (n = 0 ; n < numobs; n++) {
					int ntries = 0;
					int nmonsters = 0;
					done = B_FALSE;
					while (!done) {
						c = getrandomroomcell(map, i);
						// if nothing there
						if (c && cellwalkable(NULL, c, NULL)) {

							int obchance;
							int nadded = 0;

							// limit # monster per room to depth+1
							if (nmonsters >= (depth+1)) {
								obchance = 100;
							} else {
								// slightly more chance of objects in rooms
								obchance = c->habitat->randobpct + 10;
							}

							if (addrandomthing(c,obchance, &nadded) == TT_MONSTER) {
								nmonsters += nadded;
							}
							done = B_TRUE;
						} else {
							ntries++;
						}

						if (ntries >= numobs) {
							done = B_TRUE;
							break;
						}
					}
				}
			} // end if !vault
		} // end foreach room
	} // end if wantrooms & nrooms>0
	if (db) dblog("Finished adding stuff to rooms.");


	// river?
	if ((depth >= 4) && pctchance(20)) {
		createriver(map);
	}

	// now do a border
	y = 0;
	for (x = 0; x < map->w; x++) {
		// n
		c = getcellat(map, x, 0);
		clearcell(c);
		setcelltype(c,solidcell);
		c->locked = B_TRUE;
		// s
		c = getcellat(map, x, map->h-1);
		clearcell(c);
		setcelltype(c,solidcell);
		c->locked = B_TRUE;
	}
	for (y = 1; y < map->h-1; y++) {
		// w
		c = getcellat(map, 0, y);
		clearcell(c);
		setcelltype(c,solidcell);
		c->locked = B_TRUE;
		// e
		c = getcellat(map, map->w-1, y);
		clearcell(c);
		setcelltype(c,solidcell);
		c->locked = B_TRUE;
	}
}

void createfakes(map_t *map, cell_t *cell) {
	map->region = NULL;
	map->lf = NULL;
	map->lastlf = NULL;
	map->name = strdup("fake map");
	map->habitat = findhabitat(H_DUNGEON);
	cell->map = map;
	cell->lf = NULL;
	cell->obpile = addobpile(NULL, NULL, NULL);
	setcelltype(cell, CT_FAKE);
}

void createforest(map_t *map, int depth, map_t *parentmap, int exitdir, object_t *entryob, int nclearings) {
	int x,y;
	enum CELLTYPE emptycell;
	int i;
	int ntrees;
	int density;
	cell_t *c;
	char buf[BUFLEN];
	cell_t *retcell[MAXCANDIDATES];
	int nretcells;
	//object_t *o;
	
	// fill entire maze with emptiness
	emptycell = getmapempty(map);
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			c = addcell(map, x, y);
			setcelltype(c, emptycell);
		}
	}

	
	switch (rnd(1,2)) {
		case 1: // forest type 1:  add trees in x% of cells, then add some clearings
			// determine density
			density = rnd(40,70);
			// add a plant to density percent of cells 
			ntrees = (int)(((float)density/100.0) * (float)(map->w*map->h));
			for (i = 0; i < ntrees; i++) {
				c = getrandomcell(map);
				while (c->lf) c = getrandomcell(map);
				switch (rnd(0,1)) {
					default: case 0: strcpy(buf, "tree"); break;
					case 1: strcpy(buf, "shrub"); break;
				}
				addob(c->obpile, buf);
			}
			// clearings
			for (i = 0; i < nclearings; i++) {
				int w,n;
				c = getrandomcell(map);
				w = rnd(MINCLEARINGRADIUS,MAXCLEARINGRADIUS);
				// clear obs in all clearing cells
				getradiuscells(c, w, DT_ORTH, B_FALSE, LOF_DONTNEED, B_TRUE, retcell, &nretcells, B_FALSE);
				for (n = 0; n < nretcells; n++) {
					// kill all obs here
					while (retcell[n]->obpile->first) killob(retcell[n]->obpile->first);
				}

				// fill some cells with dirt
				getradiuscells(c, w, DT_ORTH,B_FALSE,  LOF_DONTNEED, B_TRUE, retcell, &nretcells, 70);
				for (n = 0; n < nretcells; n++) {
					setcelltype(retcell[n], CT_DIRT);
				}
			}
			break;
		case 2: //  add clusters of trees
			nclearings = rnd(5,10);
			for (i = 0; i < nclearings; i++) {
				int w,n;
				c = getrandomcell(map);
				while (c->lf) c = getrandomcell(map);

				w = rnd(MINCLEARINGRADIUS,MAXCLEARINGRADIUS);

				getradiuscells(c, w, DT_ORTH, B_FALSE, LOF_DONTNEED, B_TRUE, retcell, &nretcells, 80);
				for (n = 0; n < nretcells; n++) {
					switch (rnd(0,1)) {
						default: case 0: strcpy(buf, "tree"); break;
						case 1: strcpy(buf, "shrub"); break;
					}
					addob(retcell[n]->obpile, buf);
				}
			}
			break;
	}
}


void createhabitat(map_t *map, int depth, map_t *parentmap, int exitdir, object_t *entryob) {
	map->nrooms = 0; // reset room counts
	switch (map->habitat->id) {
		case H_DUNGEON:
			createdungeon(map, depth, parentmap, exitdir, entryob);
			break;
		case H_CAVE:
			createcave(map, depth, parentmap, exitdir, entryob);
			break;
		case H_FOREST:
			createforest(map, depth, parentmap, exitdir, entryob, rnd(0,5));
			break;
		case H_VILLAGE:
			createforest(map, depth, parentmap, exitdir, entryob, 0);
			break;
		case H_HEAVEN:
			createheaven(map, depth, parentmap, exitdir, entryob);
			break;
		case H_PIT:
			createpit(map, depth, parentmap, exitdir, entryob);
			break;
		case H_SEWER:
			createsewer(map, depth, parentmap, exitdir, entryob);
			break;
		case H_STOMACH:
			createstomach(map, depth, parentmap, exitdir, entryob);
			break;
		case H_SWAMP:
			createswamp(map, depth, parentmap, exitdir, entryob);
			break;
		case H_ALL:
			dblog("ERROR - createhabitat with invalid habitat!");
			msg("ERROR - createhabitat with invalid habitat!");
			break;
	}
}

void createheaven(map_t *map, int depth, map_t *parentmap, int exitdir, object_t *entryob) {
	int x,y;
	enum CELLTYPE emptycell,solidcell;
	cell_t *c;
	race_t *r;
	lifeform_t *lf;
	int roomid = 0;
	vault_t *v;
	int i = -1;
	//object_t *o;
	
	// what kind of cells will 'empty' ones be?
	emptycell = getmapempty(map);
	solidcell = getmapsolid(map);
	// fill entire maze with walls
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			c = addcell(map, x, y);
			setcelltype(c, solidcell);
		}
	}
	// add a random heaven vault
	v = findvaultwithtag("heaven");
	assert(v);
	if (createvault(map, map->nrooms, v, NULL, NULL, NULL, NULL)) {
		dblog("ERROR - couldn't create heaven vault '%s' on map %s", v->id, map->name);
		msg("ERROR - couldn't create heaven vault '%s' on map %s", v->id, map->name);
		assert("failed to create realm of gods" == 0);
	}

	// add one of each god.
	for (r = firstrace ; r ; r = r->next) {
		if (r->raceclass->id == RC_GOD) {
			// find next valid position with a holy circle.
			i++;
			c = map->cell[i];
			while (!hasob(c->obpile, OT_HOLYCIRCLE)) {
				i++;
				if (i >= map->w * map->h) {
					dblog("ERROR - couldn't find home position for god!");
					msg("ERROR - couldn't find home position for god!");
					assert("failed to find home pos for god" == 0);
				} 
				c = map->cell[i];
			}
			// place god
			lf = addmonster(c, r->id, NULL, B_FALSE, 1, B_FALSE, NULL);
			assert(lf);
			// add to god list
			godlf[ngodlfs++] = lf;
			if (ngodlfs > MAXGODS) {
				dblog("Error - number of gods(%d) exceeds MAXGODS.",ngodlfs);
				msg("Error - number of gods(%d) exceeds MAXGODS.",ngodlfs); more();
				exit(1);
			}
			roomid++;
		}
	}
}


/*
	seed = random number seed
	turnpct = percentage change of a corridor turning
	sparseness = how many times to chop off dead ends
	looppct = percentage change of turning dead-end into loop
	maxrooms = max # of rooms
*/
void createmap(map_t *map, int depth, region_t *region, map_t *parentmap, int exitdir, object_t *entryob) {
	lifeform_t *lf;
	map_t *m;
	char buf[BUFLEN],buf2[BUFLEN];
	int i,x,y;
	enum HABITAT habitat;
	regionthing_t *thing[MAXOUTLINETHINGS];
	int nthings = 0,failed,nstairslinked = 0;
	int db = B_TRUE;

	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	// determine habitat based on region
	// note: we might override this later based on our region outline
	habitat = region->rtype->defaulthabitat;

	/*
	if ((region->rtype->id == RG_WORLDMAP) && (depth == 1)) {
		firstworldmap = B_TRUE;
	}
	*/
	map->beingcreated = B_TRUE;
	
	map->depth = depth;
	map->region = region;
	
	if (db) {
		getregionname(buf, map, NULL, RF_SHORT);
		dblog("Creating new map of region '%s'",buf);
	}
	map->habitat = findhabitat(habitat);

	map->nrooms = 0;

	// link to other maps if required.
	// default to no links
	for (i = D_N; i <= D_W; i++) {
		map->nextmap[i] = -1;
	}
	for (i = D_UP; i <= D_DOWN; i++) {
		map->nextmap[i] = -1;
	}

	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	// look for adjacent maps above/below this one
	if (db) dblog("  look for adjacent maps above/below this one");
	for (i = depth-1; i <= depth+1; i += 2) {
		map_t *othermap;
		othermap = findregionmap(map->region->id, i);
		// TODO: set upmap/downmap for use later on.
		if (othermap) {
			if (i == (depth-1)) {
				map->nextmap[D_UP] = othermap->id;
				if (db) dblog("    found mapin dir d_up: %s", othermap->name);
			} else {
				map->nextmap[D_DOWN] = othermap->id;
				if (db) dblog("    found mapin dir d_down: %s", othermap->name);
			}
		}
	}

	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	// did we come from a previous map in the same region?
	if (parentmap && (exitdir != D_NONE)) {
		if ((parentmap->region->id == map->region->id) ||
		   (map->region->rtype->majorbranch)) {
			if (db) dblog("  linking to parentmap %s in dir %s", parentmap->name, getdirname(diropposite(exitdir)));
			parentmap->nextmap[exitdir] = map->id;
			assert(exitdir >= 0);
			map->nextmap[diropposite(exitdir)] = parentmap->id;
		}
	}
	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	/*
	if (map->region->rtype->id == RG_WORLDMAP) {
		map_t *adjmap;
		for (i = D_N; i <= D_W; i++) {
			// is there a map this dir from us???
			adjmap = findmapcoords(, x, y);
			if (i == diropposite(exitdir) ) {
				map->nextmap[i] = parentmap->id;
			} else {
				map->nextmap[i] = -1;
			}
		}
	}
	*/

	map->w = MAX_MAPW;
	map->h = MAX_MAPH;

	// map depth?
	map->depth = depth;

	// rememebr seed
	map->seed = rand() % 65535;
	srand(map->seed);

	// set map coords
	// first world map??
	if (map == firstmap) {
		if (db) dblog("  map is the first world map. setting coords to 0,0.");
		addflag(map->flags, F_MAPCOORDS, 0, 0, NA, NULL);
		x = 0;
		y = 0;
	} else {
		// set mapcoords if not already done.
		if (!hasflag(map->flags, F_MAPCOORDS)) {
			x = -999;
			y = -999;
			// set mapcoords based on parent map
			if (parentmap) {
				getmapcoords(parentmap, &x, &y);
				assert((x != -999) && (y != -999));
				switch (exitdir) {
					case D_N:
						y--;
						break;
					case D_E:
						x++;
						break;
					case D_S:
						y++;
						break;
					case D_W:
						x--;
						break;
					default:
						// no change
						break;
				}
				if (db) dblog("  setting map coords to %d,%d (based on parent map)",x,y);
			} else {
				// set it based on something else...
				if (region->rtype->id == RG_WORLDMAP) {
					// TODO: is this right???????????
					// find another map of this region and set it.
					for (m = firstmap ; m ; m = m->next) {
						if ((m != map) && (m->region == region)) {
							flag_t *ff;
							ff = hasflag(m->flags, F_MAPCOORDS);
							if (ff) {
								if (db) dblog("  setting map coords to %d,%d (based on other region map)",x,y);
								x = ff->val[0];
								y = ff->val[1];
								break;
							}
						}
					}
				} else {
					x = 0;
					y = 0;
				}
			}
			assert(x != -999);
			assert(y != -999);
			addflag(map->flags, F_MAPCOORDS, x, y, NA, NULL);
		}
	}
	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	// we now have the map name!
	getregionname(buf2, map, NULL, RF_WITHLEVEL);
	snprintf(buf, BUFLEN, "%s (id #%d)",buf2, map->id);
	map->name = strdup(buf);

	// get a list of what things are here based on the region's outline
	map->nfixedrooms = 0;
	nthings = 0;
	if (region->outline) {
		if (db) dblog("  checking region outline for things...");
		for (i = 0; i < region->outline->nthings; i++) {
			int matched = B_FALSE;
			if (db) {
				dblog("   Checking outlinething #%d (thing:depth=%d,x=%d,y=%d  thismap:depth=%d,x=%d,y=%d  ).", i, 
					region->outline->thing[i].depth,
					region->outline->thing[i].x,
					region->outline->thing[i].y,
					depth,x,y
					);
			}

			if ((region->rtype->id == RG_WORLDMAP) && 
			    (region->outline->thing[i].depth == NA)) { // match on x/y coords
				if ((region->outline->thing[i].x == x) && (region->outline->thing[i].y == y)) {
					matched = B_TRUE;
				}
			} else { // match on depth
				if (region->outline->thing[i].depth == map->depth) { 
					matched = B_TRUE;
				}
			}

			if (matched) {
				// override region
				if (region->outline->thing[i].whatkind == RT_HABITAT) {
					habitat_t *h;
					h = findhabitat(region->outline->thing[i].value);
					if (db) dblog("    setting map habitat to %s based on outlinething.",h->name);
					map->habitat = h;
				} else {
					if (db) dblog("    remembering region thing for later.");
					// remember this thing
					thing[nthings] = &region->outline->thing[i];
					switch (thing[nthings]->whatkind) {
						case RT_VAULT:
						case RT_RNDVAULTWITHFLAG:
						case RT_RNDVAULTWITHTAG:
							// this will reduce the amount of random rooms which can
							// be created on this map.
							map->nfixedrooms++;
							break;
						default:
							break;
					}
					nthings++;
				}
			}
		}
	} else {
		if (db) dblog("  region has no outline.");
	}
	if (db) dblog("      %d things remembered for later.",nthings);
	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	failed = B_TRUE;
	while (failed) {
		failed = B_FALSE;
		// build it...
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

		if (db) dblog("  creating map habitat.");
		createhabitat(map, depth, parentmap, exitdir, entryob);
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

		// add home objects
		if (db) dblog("  adding home objects.");
		for (lf = map->lf ; lf ; lf = lf->next) {
			addhomeobs(lf);
		}
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

		// add outline things
		if (db) dblog("  adding remembered region outline things...");
		for (i = 0; i < nthings ;i++) {
			vault_t *v;
			cell_t *c;
			// add this thing
			switch (thing[i]->whatkind) {
				case RT_HABITAT: // already handled above
					break;
				case RT_OBJECT:
					if (db) dblog("    adding forced regionthing object: %s", thing[i]->what);
					c = getrandomroomcell(map, ANYROOM);
					if (!c) c = getrandomcell(map);
					c = real_getrandomadjcell(c, WE_WALKABLE, B_ALLOWEXPAND, LOF_DONTNEED, NULL, NULL);
					addob(c->obpile, thing[i]->what);
					break;
				case RT_REGIONLINK:
					if (db) dblog("    adding regionlink");
					createregionlink(map, NULL, NULL, thing[i]->what, thing[i]->value, map->region);
					 // ... don't need to do this since we know there won't be anywhere to link to.
					//linkstairs(o);
					break;
				case RT_VAULT:
					if (db) dblog("    adding vault");
					v = findvault(thing[i]->what);
					assert(v);
					if (createvault(map, map->nrooms, v, NULL, NULL, NULL, NULL)) {
						dblog("ERROR - couldn't create vault %s on map %s", v->id, map->name);
						failed = B_TRUE;
					}
					break;
				case RT_RNDVAULTWITHFLAG:
					if (db) dblog("    adding rndvaultwithflag");
					v = findvaultwithflag(thing[i]->value);
					assert(v);
					if (createvault(map, map->nrooms, v, NULL, NULL, NULL, NULL)) {
						dblog("ERROR - couldn't create rndvaultwithflag %s on map %s", v->id, map->name);
						failed = B_TRUE;
					}
					break;
				case RT_RNDVAULTWITHTAG:
					if (db) dblog("    adding rndvaultwithtag");
					v = findvaultwithtag(thing[i]->what);
					assert(v);
					if (createvault(map, map->nrooms, v, NULL, NULL, NULL, NULL)) {
						dblog("ERROR - couldn't create rndvaultwithtag %s on map %s", v->id, map->name);
						failed = B_TRUE;
					}
					break;
			}
		}
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

		// ensure there are no unreachable areas
		if (!failed) {
			if (fix_reachability(map)) {
				failed = B_TRUE;
			} 
		}
		//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

		if (failed) {
			region_t *r,*nextr;
			dblog("********* got errors - restarting map creation. *********");
			// remove map flags added during vault creation.
			killflagsofid(map->flags, F_MAPSHAPE);
			killflagsofid(map->flags, F_ROOMEXIT);
			// unlink stairs on adjacent maps
			unlinkstairsto(map);
			// remove regions created by regionlinks in this map.
			for (r = firstregion ; r ; r = nextr ){
				nextr = r->next;
				if (r->createdbymapid == map->id) {
					killregion(r);
				}
			}
		}
	}
	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging


	if (map->habitat->id == H_CAVE) {
		// expand the cave a little more now that we've fixed reachability.
		// this will help make any new corridors look more 'cave-like'.
		expand_cave(map, 2);
	}

	// add any required stairs
	finalisemap(map, entryob);

	// special cases
	// village - add town walls and clear it out
	if (db) dblog("  finalising village creation...");
	if (map->habitat->id == H_VILLAGE) {
		int x1 = 999,y1 = 999,x2 = -1,y2 = -1,x,y;
		int gx[MAXDIR_ORTH],gy[MAXDIR_ORTH];
		int guardx[MAXDIR_ORTH][2], guardy[MAXDIR_ORTH][2];
		int dir;
		cell_t *c;
		// find outermost dimensions of shops
		for (y = 0; y < map->h; y++) {
			for (x = 0; x < map->w; x++) {
				c = getcellat(map, x, y);
				if (c && isroom(c)) {
					if (c->x < x1) x1 = c->x;
					if (c->y < y1) y1 = c->y;
					if (c->x > x2) x2 = c->x;
					if (c->y > y2) y2 = c->y;
				}
			}
		}

		// extend walls a bit more
		x1 -= rnd(2,4);
		y1 -= rnd(2,4);
		x2 += rnd(2,4);
		y2 += rnd(2,4);
		limit(&x1, 0, map->w-1);
		limit(&x2, 0, map->w-1);
		limit(&y1, 0, map->h-1);
		limit(&y2, 0, map->h-1);

		// decide where the gate will be (not the corner)
		for (dir = D_N; dir <= D_W; dir++) {
			switch (dir) {
				case D_N: 
					gx[dir] = rnd(x1+2,x2-2); 
					gy[dir] = y1; 
					guardx[dir][0] = gx[dir]-1;
					guardy[dir][0] = gy[dir]+1;
					guardx[dir][1] = gx[dir]+1;
					guardy[dir][1] = gy[dir]+1;
					break;
				case D_E: 
					gx[dir] = x2; 
					gy[dir] = rnd(y1+2,y2-2); 
					guardx[dir][0] = gx[dir]-1;
					guardy[dir][0] = gy[dir]-1;
					guardx[dir][1] = gx[dir]-1;
					guardy[dir][1] = gy[dir]+1;
					break;
				case D_S: 
					gx[dir] = rnd(x1+2,x2-2); 
					gy[dir] = y2; 
					guardx[dir][0] = gx[dir]-1;
					guardy[dir][0] = gy[dir]-1;
					guardx[dir][1] = gx[dir]+1;
					guardy[dir][1] = gy[dir]-1;
					break;
				case D_W: 
					gx[dir] = x1; 
					gy[dir] = rnd(y1+2,y2-2); 
					guardx[dir][0] = gx[dir]+1;
					guardy[dir][0] = gy[dir]-1;
					guardx[dir][1] = gx[dir]+1;
					guardy[dir][1] = gy[dir]+1;
					break;
			}
		}

		// fill in town walls and clearing
		for (y = 0; y <= map->h; y++) {
			for (x = 0; x <= map->w; x++) {
				c = getcellat(map, x, y);
				if (c) {
					if ((c->x >= x1) && (c->y >= y1) &&
						    (c->x <= x2) && (c->y <= y2)) {
						// ie. within the village
						if (!c->type->solid) {
							int i;

							// mark as different habitat to outside
							c->habitat = findhabitat(H_VILLAGE);
							if (!isroom(c)) { 
								// get rid of objects (ie. trees) here
								killallobs(c->obpile);
								// make the ground dirt
								setcelltype(c, CT_DIRT);
							}

							if ((c->x == x1) || (c->y == y1) ||
								    (c->x == x2) || (c->y == y2)) {
								// town perimeter (walls)
								if (!isroom(c)) {
									clearcell(c);
									setcelltype(c, CT_DIRT);
									addob(c->obpile, "wooden fence");
								}
							} 

							for (dir = D_N; dir <= D_W; dir++) {
								// town gate location
								if ((c->x == gx[dir]) && (c->y == gy[dir])) {
									int d2;
									cell_t *c2;
									clearcell(c);
									setcelltype(c, CT_DIRT);
									addob(c->obpile, "wooden gate");
									// also make surrounding forest cells be dirt and no trees, 
									for (d2 = DC_N; d2 <= DC_NW; d2++) {
										c2 = getcellindir(c, d2);
										if (c2 && (c2->habitat->id != H_VILLAGE)) { 
											clearcell(c2);
											setcelltype(c2, CT_DIRT);
										}
									}
								}
								// village guards
								for (i = 0; i < 1; i++) {
									if ((c->x == guardx[dir][i]) && (c->y == guardy[dir][i])) {
										addmonster(c, R_TOWNGUARD, NULL, B_FALSE, 1, B_TRUE, NULL);
									}
								}
							}
						}
					} else {
						// not within the village
						c->habitat = findhabitat(H_FOREST);
					}
				} // end if c
			}
		}
	}

	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
	// try to join up any unlinked staircases in this map.
	if (db) dblog("  joining unlinked stairs...");
	nstairslinked = 0;
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			cell_t *c;
			object_t *o;
			c = getcellat(map, x, y);
			o = hasobwithflag(c->obpile, F_CLIMBABLE);
			if (o && (o->type->id != OT_PORTAL) && !getstairdestination(o, NULL) && !hasflag(o->flags, F_MAPLINK)) {
				// this will join these stairs to existing ones on
				// existing adjacent maps 
				if (!linkstairs(o, NULL)) {
					if (db) {
						cell_t *dst;
						dst = getstairdestination(o, NULL);
						dblog("  linked '%s' to map %s",o->type->name, dst->map->name);
					}
					nstairslinked++;
				} else {
					if (db) {
						dblog("  FAILED to link stairs: '%s'",o->type->name);
					}
				
				}
			}
		}
	}
	if (db) dblog("  linked %d stairs.", nstairslinked);


	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging
	// link up holes - this will create NEW holes in THIS map connecting to 
	// EXISTING unlinked holes in adjacent maps
	i = linkholes(map);
	if (db) {
		if (db) dblog("  autolinked to %d holes in adjacent maps.",i);
	}
	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	// add random objects and monsters , and remove
	// bad objects
	if (db) dblog("  adding random objects+monsters");
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			cell_t *c;
			c = getcellat(map, x, y);
			if (c) {
				// add random obs, but not in vaults
				if (isempty(c) && !getcellvault(c)) {
					if (rnd(1,100) <= c->habitat->randthingpct) {
						addrandomthing(c, c->habitat->randobpct, NULL);
					}
				}
				// remove bad objects
				if (!c->room) {
					object_t *o,*nexto;
					for (o = c->obpile->first ; o ; o = nexto) {
						nexto = o->next;
						if (hasflag(o->flags, F_ONLYINROOM)) {
							killob(o);
						}
					}
				}
			}
		}
	}
	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	// look for adjacent maps 
	if (db) dblog("  linking to adjacent maps");
	getmapcoords(map, &x, &y);
	assert(x != -999);
	assert(y != -999);
	for (m = firstmap ; m ; m = m->next) {
		if ((m != map) && (m->region == map->region)) {
			int thisx,thisy;
			getmapcoords(m, &thisx, &thisy);
			if (map->nextmap[D_N] == -1) {
				if ((thisy == (y - 1)) && (thisx == x)) {
					map->nextmap[D_N] = m->id;
					if (db) dblog("  linked to map %d (dir N)",m->id);
				}
			}
			if (map->nextmap[D_E] == -1) {
				if ((thisx == (x + 1)) && (thisy == y)) {
					map->nextmap[D_E] = m->id;
					if (db) dblog("  linked to map %d (dir E)",m->id);
				}
			}
			if (map->nextmap[D_S] == -1) {
				if ((thisy == (y + 1)) && (thisx == x)) {
					map->nextmap[D_S] = m->id;
					if (db) dblog("  linked to map %d (dir S)",m->id);
				}
			}
			if (map->nextmap[D_W] == -1) {
				if ((thisx == (x - 1)) && (thisy == y)) {
					map->nextmap[D_W] = m->id;
					if (db) dblog("  linked to map %d (dir W)",m->id);
				}
			}
		}
	}
	//if (gamemode == GM_GAMESTARTED) checkallflags(player->cell->map); // debugging

	map->beingcreated = B_FALSE;
	if (db) dblog("  Map creation finished.");
}

void createsewer(map_t *map, int depth, map_t *parentmap, int exitdir, object_t *entryob) {
	object_t *o,*nexto;
	cell_t *c;
	flag_t *f;
	int i;
	int startx,starty,x,y,rx,ry;
	int maxroomsx,maxroomsy;
	int roomcountx,roomcounty;
	//int corridorsizex = 3;
	//int corridorsizey = 2;
	int corridorsize; // length of corridors between rooms
	int roomfullsize; // room size including walls
	int roomsize; // room size without walls
	int sectionsize; // a section is a room+corridor
	int *roomon,*rowfirst,*rowlast,*colfirst,*collast;
	int numon = 0;
	char buf[BUFLEN];

	corridorsize = rnd(2,3); 
	roomfullsize = rnd(5,9); if ((roomfullsize % 2) == 0) roomfullsize++; 
	sectionsize = corridorsize + roomfullsize;
	roomsize = roomfullsize - 2; // don't include outer walls.


	// select how many very/horz rooms
	// we are being over cautious here since "sectionsize"
	// is a room + corridor.
	//     (x-1) corridors. ie:
	//    Room --- Room --- Room xxx
	//     |         |        |
	//     |         |        |
	//    Room --- Room --- Room xxx
	//     x         x        x
	//     x         x        x
	//    
	//   == Across: 3 rooms, 2 corridors 
	//   == Down: 2 rooms, 1 corridor
	///  x = left over sectionsize
	maxroomsx = ((map->w - 2)  ) / (sectionsize);
	maxroomsy = ((map->h - 2)  ) / (sectionsize);
	roomcountx = maxroomsx;
	roomcounty = maxroomsy;


	// fill entire maze with walls
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			addcell(map, x, y);
		}
	}
	roomon = malloc((roomcountx * roomcounty) * sizeof(int));
	rowfirst = malloc(roomcounty * sizeof(int));
	rowlast = malloc(roomcounty * sizeof(int));
	colfirst = malloc(roomcountx * sizeof(int));
	collast = malloc(roomcountx * sizeof(int));
	numon = 0;
	while (numon == 0) {
		for (ry = 0; ry < roomcounty; ry++) {
			for (rx = 0; rx < roomcountx; rx++) {
				i = (ry*roomcountx)+rx;

				if (pctchance(66)) {
					roomon[i] = B_TRUE;
					numon++;
				} else {
					roomon[i] = B_FALSE;
				}
			}
		}
	}

	// now figure first/last rooms in each row 
	for (ry = 0; ry < roomcounty; ry++) {
		rowfirst[ry] = -1;
		for (rx = 0; rx < roomcountx; rx++) {
			i = (ry*roomcountx)+rx;
			if (roomon[i]) {
				if (rowfirst[ry] == -1) {
					rowfirst[ry] = rx;
				}
				rowlast[ry] = rx;
			}
		}
	}
	// now figure first/last rooms in each column 
	for (rx = 0; rx < roomcountx; rx++) {
		colfirst[rx] = -1;
		for (ry = 0; ry < roomcounty; ry++) {
			i = (ry*roomcountx)+rx;
			if (roomon[i]) {
				if (colfirst[rx] == -1) {
					colfirst[rx] = ry;
				}
				collast[rx] = ry;
			}
		}
	}
	
	dblog("SEWER debug:");
	dblog("   sectionsize is %d (room=%d, corridor=%d)", sectionsize, roomfullsize, corridorsize);
	dblog("   roomcountx is %d, roomcounty is %d", roomcountx, roomcounty);
	for (ry = 0; ry < roomcounty; ry++) {
		char buf2[BUFLEN];
		strcpy(buf, "");
		for (rx = 0; rx < roomcountx; rx++) {
			i = (ry*roomcountx)+rx;
			if (roomon[i]) {
				strcat(buf, "#");
			} else {
				strcat(buf, "-");
			}
		}
		sprintf(buf2, " (rowfirst is %d, rowlast is %d)", rowfirst[ry], rowlast[ry]);
		dblog("%s%s", buf, buf2);
	}


	// start at top left corner of top left room
	startx = 1;
	starty = 1;
	x = startx;
	y = starty;
	// add square rooms in a gridlike layout
	for (ry = 0; ry < roomcounty; ry++) {
		for (rx = 0; rx < roomcountx; rx++) {
			i = (ry*roomcountx)+rx;
			if (roomon[i]) {
				int thisid;
				int x2,y2;
				thisid = map->nrooms;
				// add a room here
				x2 = x+roomfullsize-1;
				y2 = y+roomfullsize-1;
				createroom(map, thisid, x, y, x2, y2, B_TRUE);
				// define exit locations
				if (ry != colfirst[rx]) addflag(map->flags, F_ROOMEXIT, thisid, x+(roomfullsize/2), y, NULL); // N
				if (ry != collast[rx]) addflag(map->flags, F_ROOMEXIT, thisid, x+(roomfullsize/2), y2, NULL); // S
				if (rx != rowfirst[ry]) addflag(map->flags, F_ROOMEXIT, thisid, x, y+(roomfullsize/2), NULL); // W
				if (rx != rowlast[ry]) addflag(map->flags, F_ROOMEXIT, thisid, x2, y+(roomfullsize/2), NULL); // E
			}
			// move on to next room position
			x += sectionsize;
			assert(x < map->w);
		}
		x = startx;
		y += sectionsize;
		assert(y < map->h);
	}
	free(roomon);
	free(rowfirst);
	free(rowlast);
	free(colfirst);
	free(collast);
	dblog("END SEWER debug");

	// link rooms with corridors
	for (i = 0; i < map->nrooms; i++) {
		linkexits(map, map->room[i].id);
	}


	// replace all empty cells with slime (except the exit one) 
	for (i = 0; i < (map->w*map->h); i++){
		c = map->cell[i];
		if (!c->type->solid) {
			setcelltype(c, CT_LOWFLOOR);
			addob(c->obpile, "waist-deep slime");
		}
	}

	// any solid cell with orthogonally-adjacent water (except the exit one)
	// now turns into a walkway
	for (i = 0; i < (map->w*map->h); i++){
		cell_t *c2;
		c = map->cell[i];
		if (c->type->solid) {
			int dir,makewalkway = B_FALSE;
			for (dir = D_N; dir <= D_W; dir++) {
				c2 = getcellindir(c, dir);
				if (c2 && (c2->type->id == CT_LOWFLOOR)) {
					makewalkway = B_TRUE;
					break;
				}
			}
			if (makewalkway) setcelltype(c, getcellempty(c));
		} else if (c->type->id == CT_LOWFLOOR) {
			// any water cell orthogonally surrounded by water becomes very deep
			int dir,surrounded = B_TRUE;
			for (dir = D_N; dir <= D_W; dir++) {
				c2 = getcellindir(c, dir);
				if (c2 && (c2->type->id != CT_LOWFLOOR)) {
					surrounded = B_FALSE;
					break;
				}
			}
			if (surrounded) {
				setcelltype(c, CT_VLOWFLOOR);
				setwaterdepth(c, DP_MAX);
			}
		}
	}



	// now move all objects out of the water
	for (i = 0; i < (map->w*map->h); i++){
		c = map->cell[i];
		if (c->type->id == CT_LOWFLOOR) {
			for (o = c->obpile->first ; o ; o = nexto) {
				nexto = o->next;
				if (o->type->id != OT_SLIMEPOOL) {
					cell_t *c2;
					c2 = getrandomcelloftype(map, getcellempty(c));
					moveob(o, c2->obpile, ALL);
				}
			}
		}
	}

	// add the exit.  make sure it's next to a wall so it's possible to climb to.
	// also ensure it's not over water.
	c = NULL;
	while (!c || (countadjwalls(c) == 0) || getcellwaterdepth(c, NULL)) {
		c = getrandomroomcell(map, ANYROOM);
		assert(c);
	}
	o = addobfast(c->obpile, OT_GRATINGROOF);
	assert(o);
	// have to force these stairs to go back to a different region.
	f = hasflag(o->flags, F_CLIMBABLE);
	assert(f);
	f->val[1] = map->region->parentregion->id;
	linkstairs(o, entryob);
}

void createstomach(map_t *map, int depth, map_t *parentmap, int exitdir, object_t *entryob) {
	vault_t *v;
	int x,y;

	// fill entire maze with walls
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			addcell(map, x, y);
		}
	}
	// add a random worm vault
	v = findvaultwithtag("stomach");
	assert(v);
	if (createvault(map, map->nrooms, v, NULL, NULL, NULL, NULL)) {
		dblog("ERROR - couldn't create stomach vault '%s' on map %s", v->id, map->name);
		msg("ERROR - couldn't create stomach vault '%s' on map %s", v->id, map->name);
	}

	// add an empty maplink to the exits - this will be filled in by OT_A_SWALLOW code in spell.c
	// also stop acid from disappearing
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			cell_t *c;
			object_t *o;
			c = getcellat(map, x, y);
			o = hasob(c->obpile, OT_STOMACHEXIT);
			for (o = c->obpile->first ; o ; o = o->next) {
				if (o->material->id == MT_ACID) {
					killflagsofid(o->flags, F_OBHPDRAIN);
				}
				if (o->type->id == OT_STOMACHEXIT) {
					killflagsofid(o->flags, F_MAPLINK);
					addflag(o->flags, F_MAPLINK, parentmap->id, NA, NA, NULL);
				}
			}
		}
	}
}

void createswamp(map_t *map, int depth, map_t *parentmap, int exitdir, object_t *entryob) {
	int x,y;
	cell_t *c;
	object_t *o, *nexto;

	// first create a normal dungeon
	createdungeon(map, depth, parentmap, exitdir, entryob);

	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			c = getcellat(map, x, y);
			// replace all walls with water
			if (c->type->solid) {
				setcelltype(c, CT_LOWFLOOR);
				addob(c->obpile, "very deep water");
			}
			// remove all doors
			for (o = c->obpile->first ; o ; o = nexto) {
				nexto = o->next;
				if (isdoor(o, NULL)) {
					killob(o);
				}
			}
		}
	}
}

int createvault(map_t *map, int roomid, vault_t *v, int *retw, int *reth, int *retx, int *rety) {
	int w,h,x,y;
	int xmargin = DEF_VAULTMARGIN,ymargin = DEF_VAULTMARGIN; // defaults
	int minx,miny,maxx,maxy;
	int db = B_FALSE;
	int rotation = 0;
	room_t *thisroom = NULL;
	flag_t *f;

	// default
	if (retw) *retw = -1;
	if (reth) *reth = -1;

	if (!v) {
		return B_TRUE;
	}

	f = hasflag(v->flags, F_KEEPMARGIN);
	if (f) {
		xmargin = f->val[0];
		ymargin = f->val[1];
	}

	// handle rotation.
	rotation = rnd(0,v->nmaps-1);

	f = hasflag(v->flags, F_VAULTRANDOMMAP);
	if (f) {
		int minw,minh;
		// just make a normal room to start with. but make sure :
		// - it is surrounded with walls!
		// - we don't do autodoors (will handle this further down) -------------
		minw = f->val[0];
		minh = f->val[1];
		if (calcposandmakeroom(map, roomid, minw, minh, xmargin, ymargin, &minx, &miny, &w, &h, B_NODOORS, B_TRUE)) {
			return B_TRUE;
		}
		if (db) dblog("made random vault %s at pos %d,%d on map %s", v->id, minx, miny, map->name);
		maxx = minx + w - 1;
		maxy = miny + h - 1;
	} else {
		// get width/height from vault
		//w = v->w;
		//h = v->h;
		getvaultwh(v, &w, &h, rotation);
		// find vault position
		if (calcroompos(map, w, h, xmargin, ymargin, &minx, &miny, B_TRUE)) {
			// forced calcroompos should never fail since it's
			// allowed to overlap other rooms.
			dblog("** couldn't find position for vault %s (roomid %d)!\n", v->id, roomid);
			//msg("** ALERT: couldn't make vault room!\n");
			return B_TRUE;
		} 
		maxx = minx + (w-1);
		maxy = miny + (h-1);

		map->room[map->nrooms].id = roomid;
		map->room[map->nrooms].x1 = minx;
		map->room[map->nrooms].y1 = miny;
		map->room[map->nrooms].x2 = maxx;
		map->room[map->nrooms].y2 = maxy;
		map->room[map->nrooms].vault = v;
		map->room[map->nrooms].exitslinked = B_FALSE;
		thisroom = &(map->room[map->nrooms]);
		map->nrooms++;

		// now make it
		if (db) dblog("making vault %s at pos %d,%d on map %s", v->id, minx, miny, map->name);
		for (y = miny; y <= maxy; y++) {
			for (x = minx; x <= maxx; x++) {
				cell_t *cell;
				celltype_t *ct;
				cell = getcellat(map, x, y);

				clearcell(cell);

				// set cell type
				ct = getvaultcelltype(v, x-minx,y-miny, rotation);
				setcelltype(cell, ct ? ct->id : getcellempty(cell));
				// set roomid
				cell->room = thisroom;
				// add objects
				addvaultcellcontents(cell, v, x-minx,y-miny, rotation);
			}
		}

		markroomwalls(map, thisroom);
	}

	if (retw) *retw = w;
	if (reth) *reth = h;
	if (retx) *retx = minx;
	if (rety) *rety = miny;

	// add other stuff to the vault based on flags
	// this will also set cell->vault for all cells.
	addvaultcontents(map, v, minx, miny, maxx, maxy, rotation);

	// auto add doors if required
	f = hasflag(v->flags, F_AUTODOORS);
	if (f) {
		// when adding autodoors to a vault, they are ALWAYS closed.
		autodoors(map, roomid, minx, miny, maxx, maxy, f->val[0], B_NODOORS);
	}

	// link up exits from this vault
	if (!hasflag(v->flags, F_VAULTNOLINK)) {
		linkexits(map, roomid);
	}

	return B_FALSE;
}

void killcell(cell_t *c) {
	killobpile(c->obpile);
	if (c->writing) free(c->writing);
}

void killcelltype(celltype_t *ct) {
	celltype_t *nextone, *lastone;
	if (ct->name) free(ct->name);
	if (ct->flags) killflagpile(ct->flags);

	// remove from list
        nextone = ct->next;
        if (nextone != NULL) {
                nextone->prev = ct->prev;
        } else { /* last */
                lastcelltype = ct->prev;
        }

        if (ct->prev == NULL) {
                /* first */
                nextone = ct->next;
                free(firstcelltype);
                firstcelltype = nextone;
        } else {
                lastone = ct->prev;
                free (lastone->next );
                lastone->next = nextone;
        }
}

void killfakes(map_t *map, cell_t *cell) {
	killobpile(cell->obpile);
	free(map->name);
}

void killmap(map_t *m) {
	map_t *nextone, *lastone;
	int i;
	// free mem
	while (m->lf) killlf(m->lf);
	
	killflagpile(m->flags);
	m->flags = NULL;
	
	for (i = 0; i < (m->w*m->h); i++){
		killcell(m->cell[i]);
	}

	// remove from list
        nextone = m->next;
        if (nextone != NULL) {
                nextone->prev = m->prev;
        } else { /* last */
                lastmap = m->prev;
        }

        if (m->prev == NULL) {
                /* first */
                nextone = m->next;
                free(firstmap);
                firstmap = nextone;
        } else {
                lastone = m->prev;
                free (lastone->next );
                lastone->next = nextone;
        }
}

void killregion(region_t *r) {
	region_t *nextone, *lastone;
	// remove from list
        nextone = r->next;
        if (nextone != NULL) {
                nextone->prev = r->prev;
        } else { /* last */
                lastregion = r->prev;
        }

        if (r->prev == NULL) {
                /* first */
                nextone = r->next;
                free(firstregion);
                firstregion = nextone;
        } else {
                lastone = r->prev;
                free (lastone->next );
                lastone->next = nextone;
        }
}

// link a single cell up to the rest of the map.
//   make sure it links to an empty cell of a DIFFERENT roomid.
//   if 'wantfilled' is set, only link to "filled" cells.
//  return TRUE on failure.
int linkexit(cell_t *startcell, int wantfilled, int *ncellsadded) {
	int db = B_FALSE;
	int d, roomid,startd,endd;
	int poss2[MAXCANDIDATES],nposs2;
	int dist[MAXDIR_ORTH],hitsedge[MAXDIR_ORTH], sameroom[MAXDIR_ORTH];
	cell_t *directendcell[MAXDIR_ORTH];
	int mindist = 999,maxdist = -1;
	cell_t *c;
	int forcedir = D_NONE;

	if (ncellsadded) *ncellsadded = 0;

	roomid = getroomid(startcell);
	if (db) dblog("   calling linkexit() for cell at %d,%d in roomid %d", startcell->x, startcell->y, roomid);

	for (d = D_N; d <= D_W; d++) {
		hitsedge[d] = B_TRUE;
		directendcell[d] = NULL;
	}

	// link it. 
	// if our cell is marked specifically as a room exit, our first direction MUST be out the
	// door.
	if (startcell->isroomwall != D_NONE) {
		forcedir = startcell->isroomwall;
		startd = forcedir;
		endd = forcedir;
	} else {
		startd = D_N; endd = D_W;
	}

	// otherwise, starting from the door, count the number of cells in 
	// each direction until we hit an empty (walkable) cell which isn't a room.

	// if we hit a cell of this roomid, mark this dir as invalid.
	for (d = startd; d <= endd; d++) {
		dist[d] = 0;
		hitsedge[d] = B_FALSE;
		sameroom[d] = B_FALSE;
		c = getcellindir(startcell, d);
		while (c) {
			int rv;
			dist[d]++;

			rv = cellokforreachability(startcell, c, roomid, d, wantfilled, &(sameroom[d]));
			if (rv == B_FALSE) {
				dist[d] = 999;
				break;
			} else if (rv == B_TRUE) {
				directendcell[d] = c;
				if (db) dblog("   can make %s path (hits empty cell at dist %d)", getdirname(d), dist[d]);
			} else { // ie. rv == B_MAYBE
				int perpdir[2],n;
				cell_t *pcell = NULL;
				perpdir[0] = d - 1; if (perpdir[0] < D_N) perpdir[0] = D_W;
				perpdir[1] = d + 1; if (perpdir[1] > D_W) perpdir[1] = D_N;
				// is there an adjacent walkable cell in a perpendicular direction 
				// which isn't from the starting room?
				for (n = 0; n <= 1; n++) {
					pcell = getcellindir(c, perpdir[n]);
					if (pcell && adjcellokforreachability(pcell, roomid, perpdir[n], wantfilled)) {
						// finished.
						directendcell[d] = c;
						if (db) dblog("   can make %s path (hits adjacent empty cell at dist %d)", getdirname(d), dist[d]);
						break;
					}
				}
			} 
			// check next cell
			c = getcellindir(c, d); // getting the same cell!
		}
		if (!c) {
			if (db) dblog("   going %s hits edge of map.", getdirname(d));
			hitsedge[d] = B_TRUE;
		}
		if (dist[d] != 999) {
			if (!hitsedge[d]) {
				if (dist[d] < mindist) mindist = dist[d];
			}
			if (dist[d] > maxdist) maxdist = dist[d];
		}
	}

	if (mindist == 999) {
		cell_t *turncell = NULL,*endcell = NULL;
		cell_t *perpcell[MAX_MAPW*MAX_MAPH];
		cell_t *perpturncell1[MAX_MAPW*MAX_MAPH];
		int perpturndir1[MAX_MAPW*MAX_MAPH];
		int nperpcells = 0;
		int perpdir[2];
		int startdir = D_NONE;
		int turndir = D_NONE;
		int startdist = 0;
		int maxdist2 = -1;
		int startposs[MAXDIR_ORTH];
		int nstartposs = 0;
		// no good directions.  
		if (db) dblog("   No directions lead to valid cells. Trying turns.");


		if (forcedir != D_NONE) {
			startdir = forcedir;
		} else {
			// starting at the LONGEST distance, traverse up each dir,
			// branching off looking for rooms. 

			// if start cell is inside a room, find longest distance which 
			// doesn't go through the same room
			for (d = D_N; d <= D_W; d++) {
				if (isroom(startcell)) {
					if (!sameroom[d] && (dist[d] > maxdist2)) {
						maxdist2 = dist[d];
					}
				} else {
					maxdist2 = dist[d];
				}
			}
			// pick one randomly
			for (d = D_N; d <= D_W; d++) {
				if (dist[d] == maxdist2) {
					startposs[nstartposs++] = d;
				}
			}
			if (nstartposs) {
				startdir = startposs[rnd(0,nstartposs-1)];
			} 
		}

		assert(startdir != D_NONE);

		// figure out perpendicular dirs
		perpdir[0] = startdir - 1; if (perpdir[0] < D_N) perpdir[0] = D_W;
		perpdir[1] = startdir + 1; if (perpdir[1] > D_W) perpdir[1] = D_N;

		if (db) dblog("   Will walk %s (dist %d), checking %s and %s.", getdirname(startdir), maxdist,
			getdirname(perpdir[0]), getdirname(perpdir[1]));

		// check in startdir
		c = getcellindir(startcell, startdir);
		while (c && !turncell) {
			int n;
			cell_t *c2;
			startdist++;
			// check left/right from this cell for rooms
			for (n = 0; n <= 1; n++) {
				int turndist = 0;
				c2 = getcellindir(c, perpdir[n]);

				while (c2) {
					int gotsolution = B_FALSE;
					int rv;
					turndist++;

					perpcell[nperpcells] = c2; // this will be used if we need to make 2 turns
					perpturncell1[nperpcells] = c; 
					perpturndir1[nperpcells] = perpdir[n];
					nperpcells++;

					rv = cellokforreachability(startcell, c2, roomid, perpdir[n], wantfilled, NULL);

					if (rv == B_FALSE) {
						break;
					} else if (rv == B_TRUE) {
						gotsolution = B_TRUE;
					} else if (turndist > 1) {
						// check l/r too
						int perpdir2[2],nn;
						cell_t *pcell = NULL;
						perpdir2[0] = perpdir[n] - 1; if (perpdir2[0] < D_N) perpdir2[0] = D_W;
						perpdir2[1] = perpdir[n] + 1; if (perpdir2[1] > D_W) perpdir2[1] = D_N;
						for (nn = 0; nn <= 1; nn++) {
							pcell = getcellindir(c2, perpdir2[nn]);
							if (pcell && adjcellokforreachability(pcell, roomid, perpdir2[nn], wantfilled)) {
								// finished.
								if (db) dblog("   Got to an empty cell next to us.");
								gotsolution = B_TRUE;
								break;
							}
						}
					}
					if (gotsolution) {
						if (db) dblog("   Solution found: Walk %d %s, then %d %s.", 
							startdist, getdirname(startdir),
							turndist, getdirname(perpdir[n]));
						// walkable and not in this roomid. ok!
						turncell = c;
						endcell = c2;
						turndir = perpdir[n];
						break;
					} 
					// check next cell
					c2 = getcellindir(c2, perpdir[n]);
				}
				if (turncell) break;
			}
			// now keep going in main direction.
			c = getcellindir(c, startdir); 
		}

		if (turncell) {
			// make a path up to the turn point.
			if (db) dblog("   Making path from vault to corner, initdir=%s", getdirname(startdir));
			c = getcellindir(startcell, startdir);
			while (c != turncell) {
				breakwall(c);
				if (ncellsadded) (*ncellsadded)++;
				c = getcellindir(c, startdir);
			}
			// clear the corner cell
			breakwall(c);
			if (db) dblog("   Making path from corner to rest of map, turndir=%s", getdirname(turndir));
			// now turn and clear up to the next room/empty cell
			c = getcellindir(c, turndir);
			while (c != endcell) {
				breakwall(c);
				if (ncellsadded) (*ncellsadded)++;
				c = getcellindir(c, turndir);
			}
		} else {
			// We need to make 2 turns.
			// for each perpcell[], look in startdir + diropposite(startdir)
			int dir3[2],i,n;
			cell_t *turncell2 = NULL;
			int turndir2;
			dir3[0] = startdir;
			dir3[1] = diropposite(startdir);
			if (db) dblog("   Need to make two turns. Searching %s and %s from each perpcell.", getdirname(dir3[0]),
						getdirname(dir3[1]));
			for (i = 0; i < nperpcells; i++) {
				for (n = 0; n < 2; n++) {
					cell_t *c2;
					int turndist = 0;

					if (db) dblog_nocr("looking %s from %d,%d: ", getdirname(dir3[n]), 
						perpcell[i]->x, perpcell[i]->y);

					c2 = getcellindir(perpcell[i], dir3[n]);
					while (c2) {
						int gotsolution = B_FALSE;
						int rv;
						turndist++;
						if (db) dblog_nocr("(%d,%d)",c2->x,c2->y);

						rv = cellokforreachability(startcell, c2, roomid, perpdir[n], wantfilled, NULL);

						if (rv == B_FALSE) {
							break;
						} else if (rv == B_TRUE) {
							gotsolution = B_TRUE;
						} else if (turndist > 1) {
							// check l/r too
							int perpdir2[2],nn;
							cell_t *pcell = NULL;
							perpdir2[0] = perpdir[n] - 1; if (perpdir2[0] < D_N) perpdir2[0] = D_W;
							perpdir2[1] = perpdir[n] + 1; if (perpdir2[1] > D_W) perpdir2[1] = D_N;
							for (nn = 0; nn <= 1; nn++) {
								pcell = getcellindir(c2, perpdir2[nn]);
								if (pcell && adjcellokforreachability(pcell, roomid, perpdir2[nn], wantfilled)) {
									// finished.
									if (db) dblog("   Got to an empty cell next to us.");
									gotsolution = B_TRUE;
									break;
								}
							}
						}
						if (gotsolution) {
							turncell = perpturncell1[i];
							turndir = perpturndir1[i];
							turncell2 = perpcell[i];
							turndir2 = dir3[n];

							endcell = c2;
							break;
						} 
						// check next cell
						c2 = getcellindir(c2, dir3[n]);
					} // end while c2
					if (turncell2) break;

					if (db) dblog("");
				} // end for n=1-2
				if (turncell2) break;
			} // end foreach perpcell

			// if we find a solution, fill in turncell2 and make path.
			if (turncell2) {
				if (db) dblog("   Twoturn solution found: Walk %s, then %s, then %s.", 
					getdirname(startdir), getdirname(turndir), getdirname(turndir2));

				// make a path up to the turn point.
				if (db) dblog("   Making path from vault to first corner, initdir=%s", getdirname(startdir));
				c = getcellindir(startcell, startdir);
				while (c != turncell) {
					breakwall(c);
					if (ncellsadded) (*ncellsadded)++;
					c = getcellindir(c, startdir);
				}
				// clear the corner cell
				breakwall(c);
				// now turn and clear up to the next turn
				if (db) dblog("   Making path from 1st corner to 2nd corner, turndir=%s", getdirname(turndir));
				c = getcellindir(c, turndir);
				while (c != turncell2) {
					breakwall(c);
					if (ncellsadded) (*ncellsadded)++;
					c = getcellindir(c, turndir);
				}

				// now turn and clear up to the next room/empty cell
				if (db) dblog("   Making path from 2nd corner to rest of map, turndir=%s", getdirname(turndir2));
				c = getcellindir(c, turndir2);
				while (c != endcell) {
					breakwall(c);
					if (ncellsadded) (*ncellsadded)++;
					c = getcellindir(c, turndir2);
				}
			} else {
				if (db) dblog("    Cannot find a way to link up.");
				// debugging - a failure here during fix_reachability is fatal.
				/*
				if (wantfilled) {
					assert(0 == 1); 
				}
				*/
				return B_TRUE;
			}
		}
	} else { // we found a way to go without needing to turn.
		int whichway,sel;
		int mindist2 = 999;
		// now pick the shortest one which doesn't hit the edge
		// get list of all the minimums and randomly tie-break
		nposs2 = 0;
		for (d = D_N; d <= D_W; d++) {
			if (!hitsedge[d] && (dist[d] < mindist2)) {
				mindist2 = dist[d];
			}
		}

		for (d = D_N; d <= D_W; d++) {
			if (dist[d] == mindist2) {
				poss2[nposs2++] = d;
			}
		}
		sel = rnd(0,nposs2-1);
		whichway = poss2[sel];

		// now create a path
		if (db) dblog("   Linking directly %s (distance %d).", getdirname(whichway), mindist);
		c = getcellindir(startcell, whichway);
		//while (c && !cellwalkable(NULL, c, NULL)) {
		while (c && c != directendcell[whichway]) {
			breakwall(c);
			if (ncellsadded) (*ncellsadded)++;
			c = getcellindir(c, whichway);
		}
	}

	// now make sure the START cell is empty too!
	if (startcell->type->solid) {
		breakwall(startcell);
	}

	return B_FALSE;
}

// make sure exits/doors in a given room link up to the rest of the map.
int linkexits(map_t *m, int roomid) {
	int x,y,i;
	cell_t *poss[MAXCANDIDATES],*c;
	int nposs = 0;
	int db = B_TRUE;
	int nadded = 0;
	int minx = -1, miny = -1, maxx = -1, maxy = -1;
	int roomidx = -1;

	// figure out room coords
	for (i = 0; i < m->nrooms; i++) {
		if (m->room[i].id == roomid) {
			minx = m->room[i].x1;
			miny = m->room[i].y1;
			maxx = m->room[i].x2;
			maxy = m->room[i].y2;
			roomidx = i;
			break;
		}
	}
	assert(roomidx != -1);

	// does this roomid actually exist??
	c = getrandomroomcell(m, roomid);
	if (!c) return B_FALSE;

	if (db) {
		char buf[BUFLEN];
		vault_t *v;
		c = getrandomroomcell(m, roomid);
		v = getcellvault(c);
		snprintf(buf, BUFLEN, "*** linkexits for roomid %d (%s) [%d,%d-%d,%d]", roomid, 
					v ? v->id : "novault",
					minx,miny,maxx,maxy);
		dblog("%s", buf);
	}

	// find all doors or f_roomexits
	for (y = miny; y <= maxy; y++) {
		for (x = minx; x <= maxx; x++) {
			c = getcellat(m, x, y);
			if (!c) continue;

			if (hasobwithflag(c->obpile, F_DOOR)) {
				if ((x == minx) || (x == maxx) || (y == miny) || (y == maxy) ) {
					if (db) dblog("found wall door at %d,%d",x,y);
					poss[nposs++] = c;
				}
			} else if (hasflagval(m->flags, F_ROOMEXIT, roomid, x, y, NULL)) {
				if (db) dblog("found roomexit at %d,%d",x,y);
				poss[nposs++] = c;
			}
		}
	}

	if (db) dblog("%d exit positions found.",nposs);

	// for each exit position, make sure it links to at least one cell which isn't
	// part of this room
	for (i = 0; i < nposs; i++) {
		int ncorridors = 0,d;

		if (db) dblog("exit #%d at %d,%d: (%s)",i, poss[i]->x, poss[i]->y, 
					(poss[i]->isroomwall != D_NONE) ? getdirname(poss[i]->isroomwall) : "nodir");
		// if exit is solid and COMPLETELY surrounded by solid, ignore it.
		if (poss[i]->type->solid && (countcellexits(poss[i], DT_ORTH) == 0)){
			if (db) dblog("cell is solid and surrounded by solids. ignoring.");
			continue;
		}

		for (d = D_N; d <= D_W; d++) {
			c = getcellindir(poss[i], d);
			if (c && cellwalkable(NULL, c, NULL) && (getroomid(c) != roomid)) {
				ncorridors++;
			}
		}
		if (db) dblog("   This exit leads to %d corridors. ", ncorridors);

		// no corridors?
		if (ncorridors == 0) {
			if (db) dblog("   Need to link.");
			if (!linkexit(poss[i], B_FALSE, NULL)) {
				nadded++;
			}
		}
	} // end for each door

	m->room[roomidx].exitslinked = B_TRUE;

	if (db) dblog("linkexits complete (%d added).", nadded);
	return nadded;
}

void createpit(map_t *map, int depth, map_t *parentmap, int exitdir, object_t *entryob) {
	object_t *o;
	cell_t *c;
	int x,y;
	// fill entire maze with walls
	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			addcell(map, x, y);
		}
	}
	// select random spot
	c = getrandomcell(map);
	// clear it
	setcelltype(c, CT_CORRIDOR);
	// put an exit here 
	o = addobject(c->obpile, NULL, B_FALSE, B_FALSE, OT_HOLEINROOF);
	assert(o);
	// link it
	linkstairs(o, entryob);
}

// only need to provide either obname _OR_ o
void createregionlink(map_t *m, cell_t *c, object_t *o, char *obname, enum REGIONTYPE newregiontype, region_t *parent) {
	flag_t *f;
	region_t *r;
	int basedepth = 0;
	if (newregiontype != RG_MAINDUNGEON) {
		basedepth = getmapdifficulty(m);
	}
	// create a new region.  
	r = addregion(newregiontype, m->region, -1, basedepth, m->id);
	// add stairs going to the new region, if required
	if (!c) {
		c = NULL;
		while (!c || !cellwalkable(NULL, c, NULL) || getcellwaterdepth(c, NULL)) {
			c = getrandomcell(m);
		}
	}

	// create object if requested
	if (!o) {
		o = addob(c->obpile, obname);
		assert(o);
	}

	// link stairs to the new region
	f = hasflag(o->flags, F_CLIMBABLE);
	assert(f);
	f->val[1] = r->id;
}

void createriver(map_t *m) {
	int dir,width,startcentre,endcentre;
	cell_t *retcell[MAX_MAPW*MAX_MAPH];
	cell_t *dirtcell[MAX_MAPW*MAX_MAPH];
	int nretcell,ndirtcells,i;
	dblog("Creating river on map %s (depth %d)!", m->name, m->depth);
	// pick direction
	dir = rnd(B_VERT,B_HORZ);
	//  pick random river width 
	width = rnd(0,2);
	//  pick random spot along top && bottom ( x >= width and x <= w-width-1) 
	//  then bresnham between spots to make centrelist
	if (dir == B_VERT) {
		startcentre = rnd(1,m->w - width - 1);
		endcentre = rnd(1,m->w - width - 1);
		calcbresnham(m, startcentre, 0, endcentre, m->h - 1, retcell, &nretcell);
	} else {
		startcentre = rnd(1,m->h - width - 1);
		endcentre = rnd(1,m->h - width - 1);
		calcbresnham(m, 0, startcentre, m->w - 1, endcentre, retcell, &nretcell);
	}

	assert(nretcell < (MAX_MAPW*MAX_MAPH));

	//  for each centrelist
	for (i = 0; i < nretcell; i++) {
		int pos,start,end,n;
		//  make a second list of rivercells (rivercell->x - wid) to (rivercell->x + wid)
		if (dir == B_VERT) {
			start = retcell[i]->x; 
			end = retcell[i]->x + width; 
		} else {
			start = retcell[i]->y; 
			end = retcell[i]->y + width; 
		}
		limit(&start, 0, m->w-1);
		limit(&end, 0, m->w-1);
		//  foreach cell across the river's width
		for (pos = start; pos <= end; pos++) {
			cell_t *c;
			object_t *o;
			if (dir == B_VERT) {
				c = getcellat(m, pos, retcell[i]->y);
			} else {
				c = getcellat(m, retcell[i]->x, pos);
			}
			//  move any staircases here to somewhere else
			while ((o = hasobwithflag(c->obpile, F_CLIMBABLE)) != NULL) {
				moveobtoclearcell(o);
			}
			//  clear cell, convert to low rock floor, add water
			clearcell(c);
			setcelltype(c, CT_LOWFLOOR);
			addobfast(c->obpile, OT_WATERDEEP);
			// suround with dirt
			getradiuscells(c, 7, DT_ORTH, B_FALSE, LOF_NEED, B_FALSE, dirtcell, &ndirtcells, 70);
			for (n = 0; n < ndirtcells; n++) {
				if (!dirtcell[n]->type->solid && (dirtcell[n]->type->id != CT_LOWFLOOR)) {
					setcelltype(dirtcell[n], CT_DIRT);
				}
			}
		}
	}
}

void createroom(map_t *map, int roomid, int x1, int y1, int x2, int y2, int forcewalls) {
	int x,y;
	room_t *thisroom = NULL;
	cell_t *cell;

	map->room[map->nrooms].id = roomid;
	map->room[map->nrooms].x1 = x1;
	map->room[map->nrooms].y1 = y1;
	map->room[map->nrooms].x2 = x2;
	map->room[map->nrooms].y2 = y2;
	map->room[map->nrooms].vault = NULL;
	map->room[map->nrooms].exitslinked = B_FALSE;
	thisroom = &(map->room[map->nrooms]);
	map->nrooms++;

	for (y = y1; y <= y2; y++) {
		for (x = x1; x <= x2; x++) {
			cell = getcellat(map, x, y);
			if (cell) {
				// kill contents, EXCEPT for staircases!
				clearcell_exceptflags(cell, F_CLIMBABLE, F_NONE);
				// make it a border or room
				if ((y == y1) || (y == y2) ||
				    (x == x1) || (x == x2)) {
					// ie. if you haven't forced walls then if this room overlaps
					// with another one, no walls will be created.
					if (forcewalls || (!forcewalls && cell->type->solid))  {
						setcelltype(cell, getcellsolid(cell));
					}
					//}
				} else {
					setcelltype(cell, getcellempty(cell));
				}
				cell->room = thisroom;
			}
		}
	}
	markroomwalls(map, thisroom);
}

// room w/h are returned in *w and *h if given.
int calcposandmakeroom(map_t *map, int roomid, int overrideminw, int overrideminh, int xmargin, int ymargin, int *retx, int *rety, int *retw, int *reth, int doorpct, int forcewalls) {
	int minx,miny;
	int maxx,maxy;
	int w,h;
	int minroomw = MIN_ROOMW;
	int minroomh = MIN_ROOMH;
	int maxroomw = MAX_ROOMW;
	int maxroomh = MAX_ROOMH;

	if (overrideminw != NA) {
		minroomw = overrideminw;
	}
	if (overrideminh != NA) {
		minroomh = overrideminh;
	}

	// select random width/height
	w = rnd(minroomw, maxroomw);
	h = rnd(minroomh, maxroomh);

	if (retw) *retw = w;
	if (reth) *reth = h;

	// find room position
	if (calcroompos(map, w, h, xmargin, ymargin, &minx, &miny, B_FALSE)) {
		dblog("** couldn't make room!\n");
		return B_TRUE;
	} 

	if (retx) *retx = minx;
	if (rety) *rety = miny;

	// we now have the room position - fill it in

//printf("trying to create room at (%d,%d) w=%d,h=%d\n", minx, miny, w, h);

	maxx = minx + (w-1);
	maxy = miny + (h-1);

	// actually make the room now.
	createroom(map, roomid, minx,miny,maxx,maxy, forcewalls);

	// add doors
	if (doorpct) {
		autodoors(map, roomid, minx, miny, maxx, maxy, doorpct, 25);
	}

	return B_FALSE;
}


int dirtox(int dt, int dir) {
	if (dt == DT_ORTH) {
		switch (dir) {
			case D_E:
				return 1;
			case D_W:
				return -1;
			default: 
				return 0;
		}
	} else if (dt == DT_COMPASS) {
		switch (dir) {
			case DC_NE:
			case DC_E:
			case DC_SE:
				return 1;
			case DC_NW:
			case DC_W:
			case DC_SW:
				return -1;
			default: 
				return 0;
		}
	}
	return 0;
}

int dirtoy(int dt, int dir) {
	if (dt == DT_ORTH) {
		switch (dir) {
			case D_S:
				return 1;
			case D_N:
				return -1;
			default: 
				return 0;
		}
	} else if (dt == DT_COMPASS) {
		switch (dir) {
			case DC_SW:
			case DC_S:
			case DC_SE:
				return 1;
			case DC_NE:
			case DC_N:
			case DC_NW:
				return -1;
			default: 
				return 0;
		}
	}
	return 0;
}


void dumpmap(map_t *map, int showrooms) {
	int x,y;
	cell_t *cell;
	char ch;
dblog("dump of map '%s' (%d x %d):\n",map->name, map->w, map->h);

	// top reference row
	dblog_nocr(" ");
	for (x = 0; x < map->w; x++) {
		dblog_nocr("%d",x % 10);
	}
	dblog_nocr("\n");

	for (y = 0; y < map->h; y++) {
		dblog_nocr("%d",y % 10);
		for (x = 0; x < map->w; x++) {
			cell = getcellat(map, x, y);
			ch = cell->type->glyph.ch;
			if (ch == '.') {
				if (showrooms && isroom(cell)) {
					ch = '0' + getroomid(cell);
				} 

				if (ch == '.') {
					if (cell->filled) {
						ch = 'o';
					}
				}
			}
			dblog_nocr("%c",ch);
		}
		dblog_nocr("\n");
	}
}

void dumpoutlines(void) {
	region_t *r;
	int i;
	for (r = firstregion ; r ; r = r->next) {
		dblog("region:%s",r->rtype->name);
		if (r->outline) {
			for (i = 0; i < r->outline->nthings; i++ ){
				regionthing_t *rt;
				char loctext[BUFLEN];
				rt = &r->outline->thing[i];
				if (rt->depth == NA) {
					snprintf(loctext, BUFLEN, "%d,%d",rt->x, rt->y);
				} else {
					snprintf(loctext, BUFLEN, "depth %d",rt->depth);
				}
				if (rt->whatkind == RT_REGIONLINK) {
					regiontype_t *rtype;
					rtype = findregiontype(rt->value);
					dblog("   at %s:  link to %s (%s)",loctext, rtype->name, rt->what);
				} else if (rt->whatkind == RT_HABITAT) { 
					habitat_t *h;
					h = findhabitat(rt->value);
					dblog("   at %s:  %s",loctext, h->name);
				} else if (rt->whatkind == RT_VAULT) { 
					vault_t *v;
					v = findvault(rt->what);
					dblog("   at %s:  %s",loctext, v->id);
				}
			}
		}
	}
}


// dirtype of DT_ORTH will give a square explosion
// dirtype of DT_COMPASS will give a circular explosion
void explodecells(cell_t *c, int dam, int killwalls, object_t *o, int range, int dirtype, int wantannounce) {
	int x,y;
	char buf[BUFLEN];
	if (wantannounce) {
		sprintf(buf, "You see %s explosion!", (range > 0) ? "a huge" : "an");
	} 

	if (dirtype == DT_COMPASS) {
		animradial(c, range, '}', C_RED, DT_COMPASS, wantannounce ? buf : NULL, wantannounce ? buf : NULL);
	} else { // ie. DT_ORTH
		animradial(c, range, '}', C_RED, DT_ORTH, wantannounce ? buf : NULL, wantannounce ? buf : NULL);
	}

	if (!haslos(player, c)) {
		noise(c, NULL, NC_OTHER, (range > 0) ? SV_PLANE : SV_TRUCK, "an explosion!", NULL);
	}

	for (y = c->y - range ; y <= c->y + range ; y++) {
		for (x = c->x - range ; x <= c->x + range ; x++) {
			int inrange = B_FALSE;
			cell_t *cc;
			cc = getcellat(c->map, x,y);
			if (cc) {
				if ((dirtype == DT_COMPASS) && (getcelldist(c,cc) <= range)) {
					inrange = B_TRUE;
				} else if ((dirtype == DT_ORTH) && (getcelldistorth(c,cc) <= range)) {
					inrange = B_TRUE;
				}
				if (inrange) {
					//cell_t *stopcell = NULL;
					// if a door stops the explosion, the door will
					// take the damage.
					//haslof(c, cc, LOF_WALLSTOP, &stopcell);
					// don't check LOF for explosions.
					explodesinglecell(cc, dam, killwalls, o, c);
				}
			}
		}
	}

	// lfs up to 1 cell away are knocked back
	for (y = c->y - range-1 ; y <= c->y + range+1 ; y++) {
		for (x = c->x - range-1 ; x <= c->x + range+1 ; x++) {
			cell_t *cc;
			int mydist;
			cc = getcellat(c->map, x,y);
			mydist = getcelldist(c,cc);
			if (cc && (mydist <= (range+1))) {
				if (cc->lf && !isdead(cc->lf)) {
					int critchance;
					// critical hit? 100% chance in middle, 60 at one cell, 20 at two cells
					critchance = 100 - (mydist*40);
					if (pctchance(critchance)) {
						criticalhit(NULL, cc->lf, BP_HANDS, pctof(critchance, dam), DT_EXPLOSIVE);
					}
					
					// move away from centre of explosion
					knockback(cc->lf, getdiraway(cc, c, NULL, B_FALSE, DT_COMPASS, B_FALSE), 2, NULL, 40-(mydist*10), B_TRUE);
				}
			}
		}
	}
}

void expand_cave(map_t *map, int numpasses) {
	int n,x,y,dir;
	cell_t *c;
	int chancetoclear;
	chancetoclear = rnd(15,25);
	for (n = 0; n < numpasses; n++) {
		// for each dug map cell, 25% chance of clearing each adjacent cell
		for (y = 0; y < map->h; y++) {
			for (x = 0; x < map->w; x++) {
				c = getcellat(map, x, y);
				if (!c->type->solid && !c->visited) { // cell is empty and not processed already?
					cell_t *c2;
					// check for surrounding solid cells
					for (dir = DC_N; dir <= DC_NW; dir++) {
						c2 = getcellindir(c, dir);
						if (c2 && c2->type->solid && pctchance(chancetoclear)) {	
							setcelltype(c2, getmapempty(map));
						}
					}
					// mark cell as processed
					c->visited = B_TRUE;
				}
			}
		}
	}
}

// this should never be called directly - only from explodecells().
//  (otherwise knockback effect won't happen)
void explodesinglecell(cell_t *c, int dam, int killwalls, object_t *o, cell_t *centre) {
	char obname[BUFLEN];

	if (c->lf) {
		char buf[BUFLEN];
		if (o) {
			getobname(o, obname, 1);
			snprintf(buf, BUFLEN, "an exploding %s",strchr(obname, ' ')+1);
		} else {
			snprintf(buf, BUFLEN, "an explosion");
		}

		// take damage
		losehp(c->lf, dam, DT_EXPLOSIVE, NULL, buf);

	}

	damageallobs(o, c->obpile, dam, DT_EXPLOSIVE, NULL);

	if (killwalls) {
		if (c->type->solid) {
			damagecell(c, dam, DT_EXPLOSIVE);
		}
	}
}

void finalisemap(map_t *map, object_t *entryob) {
	enum OBTYPE upstairtype, downstairtype;
	int i,d,x,y;
	int linkedentry = B_FALSE;
	char roomlightob[BUFLEN],corridorlightob[BUFLEN];
	int roomlightchance = 0;
	int corridorlightfreq = 0;
	int nupstairsneeded = 0,ndownstairsneeded = 0;
	cell_t *c;
	object_t *o,*nexto;
	// make sure this map has sufficient up/down staircases as defined by its
	// region type.
	// 
	//     first dungeon level is a special case. it has 1 up stairs, 3 down.

	upstairtype = map->habitat->upstairtype;
	downstairtype = map->habitat->downstairtype;

	nupstairsneeded = map->region->rtype->stairsperlev - countmapobs(map, upstairtype);
	ndownstairsneeded = map->region->rtype->stairsperlev - countmapobs(map, downstairtype);

	if ( (nupstairsneeded && (upstairtype == OT_NONE)) || 
	     (ndownstairsneeded && (downstairtype == OT_NONE)) )  {
		dblog("ERROR - need up/down stairs, but no stairtype defined for habitat %s!", map->habitat->name);
		msg("ERROR - need up/down stairs, but no stairtype defined for habitat %s!", map->habitat->name); more();
	}

	// UP STAIRS
	if (upstairtype != OT_NONE) {
		// SPECIAL CASE for first level:
		if ((map->habitat->id == H_DUNGEON)  && (map->depth == 1)) {
			flag_t *f;
			// first dungeon level. just one exit stairs
			c = NULL;
			while (!c || !isempty(c) || countobs(c->obpile, B_TRUE)) {
				c = getrandomroomcell(map, ANYROOM);
			}
			o = addobfast(c->obpile, upstairtype);
			if (entryob) {
				linkstairs(o, entryob);
			} else {
				// have to force these stairs to go back to a different region.
				f = hasflag(o->flags, F_CLIMBABLE);
				f->val[1] = map->region->parentregion->id;
				linkstairs(o, NULL);
			}

			// special case: first dungeon level has barriers over the exit stairs
			if (map->region->rtype->id == RG_MAINDUNGEON) {
				if (c->lf) killlf(c->lf);
				addobfast(c->obpile, OT_MAGICBARRIER);
				// also clear all the cells around it to prevent reachability errors
				for (d = DC_N; d <= DC_NW; d++) {
					cell_t *c2;
					c2 = getcellindir(c, d);
					if (c2) setcelltype(c2, getmapempty(map));
				}
			}
		} else {
			// up stairs on all other levels
			for (i = 0; i < nupstairsneeded; i++) {
				c = NULL;
				while (!c || !isempty(c) || countobs(c->obpile, B_TRUE)) {
					c = getrandomroomcell(map, ANYROOM);
					if (!c) {
						// ANY cell at all, doesn't have to be a room.
						c = getrandomcell(map);
					}
				}
				o = addobfast(c->obpile, upstairtype);
				assert(o);
				if (entryob && !linkedentry) {
					linkstairs(o, entryob);
					linkedentry = B_TRUE;
				} else {
					linkstairs(o, NULL);
				}
			}
		}
		// make sure we have at least one up stairs
		assert(findobinmap(map, upstairtype));
	}

	// DOWN STAIRS
	if ((downstairtype != OT_NONE) && (map->depth < map->region->rtype->maxdepth)) {
		for (i = 0; i < ndownstairsneeded; i++) {
			c = NULL;
			while (!c || !isempty(c) || countobs(c->obpile, B_TRUE)) {
				c = getrandomroomcell(map, ANYROOM);
				if (!c) {
					// ANY cell at all, doesn't have to be a room.
					c = getrandomcell(map);
				}
			}
			o = addobfast(c->obpile, downstairtype);
			assert(o);
			linkstairs(o, NULL);
		}
	}

	for (y = 0; y < map->h; y++) {
		for (x = 0; x < map->w; x++) {
			c = getcellat(map, x, y);
			for (o = c->obpile->first ; o ; o = nexto) {
				nexto = o->next;
				if (c->room && c->room->vault) {
				} else {
					// doors which go nowhere?
					if (isdoor(o, NULL)) {
						int dir, ok = B_FALSE;
						cell_t *c2;
						// check all directions for a cell which isn't
						// part of this room.
						for (dir = DC_N; dir <= DC_NW; dir++) {
							c2 = getcellindir(c, dir);
							if (c2 && cellwalkable(NULL, c2, NULL) && getroomid(c2) != getroomid(c)) {
								ok = B_TRUE;
								break;
							}
						}
						if (!ok) {
							killob(o);
							continue;
						}
					}
				}
				// unlinked stairs? ie ones added from vaults. if so, link them.
				if (hasflag(o->flags, F_CLIMBABLE) && !hasflag(o->flags, F_MAPLINK)) {
					if (o->type->id != OT_PORTAL) {
						linkstairs(o, NULL);
					}
				}
			}
		}
	}

	// if map if not fully lit, scatter light sources around. 
	switch (map->illumination) {
		case IL_FULLLIT: break;
		case IL_WELLLIT:
			strcpy(roomlightob, "patch of sun moss");
			strcpy(corridorlightob, "patch of moon moss");
			roomlightchance = 100;
			corridorlightfreq = 4;
			break;
		case IL_DIM:
			strcpy(roomlightob, "patch of moon moss");
			strcpy(corridorlightob, "patch of moon moss");
			roomlightchance = 100;
			corridorlightfreq = 6;
			break;
		case IL_SHADOWY:
			strcpy(roomlightob, "patch of moon moss");
			strcpy(corridorlightob, "patch of moon moss");
			roomlightchance = 50;
			corridorlightfreq = 8;
			break;
		case IL_FULLDARK:
			strcpy(roomlightob, "patch of moon moss");
			strcpy(corridorlightob, "patch of moon moss");
			roomlightchance = 33;
			corridorlightfreq = 0;
			break;
	}

	if (roomlightchance) {
		for (i = 0; i < map->nrooms; i++) {
			if (pctchance(roomlightchance)) {
				c = getrandomroomcell(map, i);
				addob(c->obpile, roomlightob);
			}
		}
	}
	if (corridorlightfreq) {
		for (y = 1; y < map->h-1; y += corridorlightfreq) {
			for (x = 1; x < map->w-1; x += corridorlightfreq) {
				c = getcellat(map, x, y);
				if (c && !isroom(c)) {
					cell_t *c2;
					c2 = getrandomadjcell(c, WE_NOTWALL, B_ALLOWEXPAND);
					if (c2) {
						addob(c2->obpile, corridorlightob);
					}
				}
			}
		}
	}

}

void finalisemonster(lifeform_t *lf, lifeform_t *leader, flagpile_t *wantflags) {
	flag_t *f;
	if (leader) {
		// if leader is asleep, minions will also be asleep
		if (lfhasflag(leader, F_ASLEEP)) {
			if (wantflags && hasflag(wantflags, F_ASLEEP)) {
			} else {
				addflag(wantflags, F_ASLEEP, NA, ST_ASLEEP, NA, NULL); 
			}
		}

		if ((lf->cell->map->illumination != IL_FULLLIT) && !lfhasflag(lf, F_SEEINDARK)) {
			if ((getraceclass(lf) != RC_HUMANOID) && pctchance(75)) {
				addflag(wantflags, F_SEEINDARK, rnd(3,5), NA, NA, NULL);
			}
		}

		// minions never have certain flags.
		killflagsofid(lf->flags, F_DEMANDSBRIBE);
		killflagsofid(wantflags, F_DEMANDSBRIBE);
	}

	// random monster behaviours
	if (canhaverandombehaviour(lf) && onein(6)) {
		switch (rnd(0,6)) {
			case 0: // insane
				addflag(lf->flags, F_BEHAVIOUR, NA, NA, NA, "insane");
				addflag(lf->flags, F_TERRITORIAL, 2, NA, NA, NULL); // attack anything within 1 cells
				break;
			case 1: // hungry
				addflag(lf->flags, F_BEHAVIOUR, NA, NA, NA, "hungry");
				addflag(lf->flags, F_WANTSOBFLAG, F_EDIBLE, B_COVETS, NA, NULL);
				break;
			case 2: // timid 
				addflag(lf->flags, F_BEHAVIOUR, NA, NA, NA, "timid");
				f = lfhasflag(lf, F_MORALE);
				if (f) {
					f->val[0] /= 2;
				} else {
					addflag(lf->flags, F_FLEEONDAM, B_TRUE, NA, NA, NULL);
				}
				break;
			case 3: // drugged
				addflag(lf->flags, F_BEHAVIOUR, NA, NA, NA, "drugged");
				killflagsofid(lf->flags, F_FLEEONDAM);
				killflagsofid(lf->flags, F_FLEEONHPPCT);
				addflag(lf->flags, F_NOFLEE, B_TRUE, NA, NA, NULL);
				break;
			case 4: // drunk
				addflag(lf->flags, F_BEHAVIOUR, NA, NA, NA, "drunk");
				addflag(lf->flags, F_DRUNK, rnd(2,5), NA, NA, NULL);
				break;
			case 5: // determined
				addflag(lf->flags, F_BEHAVIOUR, NA, NA, NA, "determined");
				addflag(lf->flags, F_FOLLOWTIME, (DEF_AIFOLLOWTIME*2), NA, NA, NULL);
				break;
			case 6: // lazy
				addflag(lf->flags, F_BEHAVIOUR, NA, NA, NA, "lazy");
				addflag(lf->flags, F_FOLLOWTIME, (DEF_AIFOLLOWTIME/4), NA, NA, NULL);
				break;
		}
	} 

	if (wantflags) {
		copyflags(lf->flags, wantflags, NA);
	}

	if (lfhasflag(lf, F_ASLEEP)) {
		killflagsofid(lf->flags, F_FLYING);
		killflagsofid(lf->flags, F_HIDING);
	}
}

celltype_t *findcelltype(enum CELLTYPE cid) {
	celltype_t *ct;
	for (ct = firstcelltype ; ct ; ct = ct->next) {
		if (ct->id == cid) return ct;
	}
	return NULL;
}

celltype_t *findcelltypebyname(char *name) {
	celltype_t *ct;
	for (ct = firstcelltype ; ct ; ct = ct->next) {
		if (!strcmp(ct->name, name)) return ct;
	}
	return NULL;
}

habitat_t *findhabitat(enum HABITAT id) {
	habitat_t *h;
	for (h = firsthabitat ; h ; h = h->next) {
		if (h->id == id) return h;
	}
	return NULL;
}

habitat_t *findhabitatbyname(char *name) {
	habitat_t *h;
	for (h = firsthabitat ; h ; h = h->next) {
		if (streq(h->name, name)) return h;
	}
	return NULL;
}

map_t *findmap(int mid) {
	map_t *m;
	for (m = firstmap ; m ; m = m->next) {
		if (m->id == mid) return m;
	}
	return NULL;
}

map_t *findmapofdepth(int depth) {
	map_t *m;
	for (m = firstmap ; m ; m = m->next) {
		if (m->depth == depth) return m;
	}
	return NULL;
}

object_t *findmapobwithflag(map_t *m, enum FLAG flagid) {
	cell_t *c;
	object_t *o;
	int x,y;

	for (y = 0; y < m->h; y++) {
		for (x = 0; x < m->w; x++) {
			c = getcellat(m, x, y);
			if (c) {
				o = hasobwithflag(c->obpile, flagid);
				if (o) return o;
			}
		}
	}
	return NULL;
}

object_t *findmapobwithflagval(map_t *m, enum FLAG flagid, int val0, int val1, int val2, char *text) {
	cell_t *c;
	object_t *o;
	int x,y;

	for (y = 0; y < m->h; y++) {
		for (x = 0; x < m->w; x++) {
			c = getcellat(m, x, y);
			if (c) {
				o = hasobwithflagval(c->obpile, flagid, val0, val1, val2, text);
				if (o) return o;
			}
		}
	}
	return NULL;
}

cell_t *findmapentrypoint(map_t *m, int side, lifeform_t *lf) {
	int x,y,xinc,yinc;
	
	cell_t *selection = NULL;
	cell_t *bestcell = NULL;
	int closest = 999;
	switch (side) {
		case D_N:
		case DC_N:
			x = 0;
			y = 0;
			xinc = 1;
			yinc = 0;
			bestcell = getcellat(m, lf->cell->x, 0);
			break;
		case D_E:
		case DC_E:
			x = m->w-1;
			y = 0;
			xinc = 0;
			yinc = 1;
			bestcell = getcellat(m, m->w - 1, lf->cell->y);
			break;
		case D_S:
		case DC_S:
			x = 0;
			y = m->h - 1;
			xinc = 1;
			yinc = 0;
			bestcell = getcellat(m, lf->cell->x, m->h - 1);
			break;
		case D_W:
		case DC_W:
			x = 0;
			y = 0;
			xinc = 0;
			yinc = 1;
			bestcell = getcellat(m, 0, lf->cell->y);
			break;
		default:
			dblog("error: invalid side given to mapentrypoint.");
			msg("error: invalid side given to mapentrypoint.");
			return NULL;
	}

	for (;(x < m->w) && (y < m->h);) {
		cell_t *c;
		// check cell
		c = getcellat(m, x, y);
		if (c && cellwalkable(lf, c, NULL)) {
			int dist;
			dist = getcelldist(c, bestcell);
			if (dist < closest) {
				selection = c;
				closest = dist;
			}
		}
		// go to next one
		x += xinc;
		y += yinc;
	}

	return selection;
}

// find the object with id 'id' in map 'm'
object_t *findobidinmap(map_t *m, long id) {
	cell_t *c;
	int x,y;
	for (y = 0; y < m->h; y++) {
		for (x = 0; x < m->w; x++) {
			object_t *o;
			c = getcellat(m, x, y);
			o = findobbyid(c->obpile, id);
			if (o) return o;
		}
	}
	return NULL;
}


// find the cell in 'map' which contains object oid
cell_t *findobinmap(map_t *m, enum OBTYPE oid) {
	cell_t *c;
	int x,y;
	for (y = 0; y < m->h; y++) {
		for (x = 0; x < m->w; x++) {
			c = getcellat(m, x, y);
			if (hasob(c->obpile, oid)) {
				return c;
			}
		}
	}
	return NULL;
}

regionoutline_t *findoutline(int id) {
	regionoutline_t *ro;
	for (ro = firstregionoutline ;ro ; ro = ro->next) {
		if (ro->id == id) return ro;
	}
	return NULL;
}

regiontype_t *findrandomregiontypewithname(char *name) {
	regiontype_t *rt,*poss[MAXCANDIDATES];
	int nposs = 0;
	char buf[BUFLEN];
	for (rt = firstregiontype ; rt ; rt = rt->next) {
		if (streq(buf, rt->name)) {
			poss[nposs++] = rt;
		}
	}
	if (nposs) {
		return poss[rnd(0,nposs-1)];
	} 
	return NULL;
}

region_t *findregion(int regionid) {
	region_t *r;
	for (r = firstregion ; r ; r = r->next) {
		if (r->id == regionid) return r;
	}
	return NULL;
}

// this will objviously only work for unique regiontypes like
// rg_worldmap and rg_firstdungeon
region_t *findregionbytype(enum REGIONTYPE rtid) {
	region_t *r;
	for (r = firstregion ; r ; r = r->next) {
		if (r->rtype->id == rtid) return r;
	}
	return NULL;
}

map_t *findregionmap(int regionid, int depth) {
	map_t *m;
	for (m = firstmap ; m ; m = m->next) {
		if ((m->depth == depth) && (m->region->id == regionid)) return m;
	}
	return NULL;
}

// returns the RT_REGIONLINK regionthing which links to region type rtid (eg. RG_CAVE)
regionthing_t *findregionlink(enum REGIONTYPE rtid) {
	region_t *r;
	regionthing_t *rt;
	int i;
	for (r = firstregion ; r ; r = r->next) {
		if (!r->outline) continue;
		for (i = 0; i < r->outline->nthings; i++ ){
			rt = &r->outline->thing[i];
			if ((rt->whatkind == RT_REGIONLINK) && (rt->value == rtid)) { 
				return rt;
			}
		}
	}
	return NULL;
}

// find the region thing with the given id.
// if optional 'retregion' is supplied, fill it in with the region which contains the thing.
regionthing_t *findregionthing(int id, region_t **retregion) {
	region_t *r;
	regionthing_t *rt;
	int i;
	for (r = firstregion ; r ; r = r->next) {
		if (!r->outline) continue;
		for (i = 0; i < r->outline->nthings; i++ ){
			rt = &r->outline->thing[i];
			if (rt->id == id) { 
				if (retregion) *retregion = r;
				return rt;
			}
		}
	}
	return NULL;
}

regiontype_t *findregiontype(enum REGIONTYPE rtype) {
	regiontype_t *rt;
	for (rt = firstregiontype ; rt ; rt = rt->next) {
		if (rt->id == rtype)  return rt;
	}
	return NULL;
}

regiontype_t *findregiontypebyname(char *name) {
	regiontype_t *rt;
	for (rt = firstregiontype ; rt ; rt = rt->next) {
		if (!strcasecmp(rt->name, name))  return rt;
	}
	return NULL;
}

room_t *findroom(map_t *m, int roomid) {
	int i;
	for (i = 0; i < m->nrooms; i++) {
		if (m->room[i].id == roomid) {
			return &(m->room[i]);
		}
	}
	return NULL;
}

map_t *findsurfaceexitmap(map_t *m) {
	object_t *o;
	cell_t *c;
	int x,y;
	// find up stairs on current map
	for (y = 0; y < m->h; y++) {
		for (x = 0; x < m->w; x++) {
			c = getcellat(m, x, y);
			if (c) {
				for (o = c->obpile->first ; o ; o = o->next) {
					if (hasflagval(o->flags, F_CLIMBABLE, D_UP, NA, NA, NULL)) {
						cell_t *newc;
						newc = getstairdestination(o, NULL);
						if (newc) {
							return newc->map;
						}
					}
				}
			}
		}
	}
	return NULL;
}

void forgetcells(map_t *map, int amt) {
	int amtleft;
	//int totcells;
	int i;
	cell_t *poss[MAX_MAPW*MAX_MAPH];
	cell_t *c;
	int nposs = 0;
	// how many cells to forget?
	//totcells = (map->w * map->h);
	//amtleft = (int) (((float) pct / 100.0) * (float)totcells);
	amtleft = amt;

	// get a list of all known cells
	for (i = 0; i < (map->w*map->h); i++){
		c = map->cell[i];
		if (c && c->known && !haslos(player, c)) {
			poss[nposs] = c;
			nposs++;
		}
	}

	if (amtleft > nposs) amtleft = nposs;

	// forget cells...
	for (i = 0; i < amtleft; i++) {
		int n;
		int sel;
		sel = rnd(0,nposs-1);
		poss[sel]->known = B_FALSE;
		// shuffle down
		for (n = i; n < (amtleft-1); n++) {
			poss[n] = poss[n+1];
		}
		nposs--;
	}
}

cell_t *getcellindir(cell_t *cell, int dir) {
	cell_t *newcell;
	int newx,newy;
	int dt;
	switch (dir) {
		case D_N:
		case D_S:
		case D_E:
		case D_W:
			dt = DT_ORTH;
			break;
		case DC_N:
		case DC_E:
		case DC_S:
		case DC_W:
		case DC_NE:
		case DC_SE:
		case DC_SW:
		case DC_NW:
			dt = DT_COMPASS;
			break;
		default:
			return NULL;
	}
	newx = cell->x + dirtox(dt, dir);
	newy = cell->y + dirtoy(dt, dir);
	newcell = getcellat(cell->map, newx,newy);

	return newcell;
}

vault_t *getcellvault(cell_t *c) {
	if (c->room) {
		return c->room->vault;
	} 
	return NULL;
}

cell_t *getclosestroomcell(lifeform_t *lf, int roomid) {
	int i;
	cell_t *c,*best = NULL;
	int closest = 9999;
	for (i = 0; i < lf->cell->map->w * lf->cell->map->h; i++) {
		c = lf->cell->map->cell[i];
		if ((getroomid(c) == roomid) & cellwalkable(lf, c, NULL)) {
			if (getcelldist(lf->cell, c) < closest) {
				best = c;
			}
		}
	}
	return best;
}

// select a new direction (random chance of turnung)
int getnewdigdir(cell_t *cell, int lastdir, int turnpct, int *moved) {
	int foundvaliddir = B_FALSE;
	int dir;
	int tried[4], numtries;
	int i;
	int turned = B_FALSE;
	cell_t *newcell;
	int db = B_FALSE;
	char err[BUFLEN];

	// haven't tried any dirs yet
	numtries = 0;
	for (i = 0; i < MAXDIR_ORTH; i++) {
		tried[i] = B_FALSE;
	}

	while (!foundvaliddir) { // keep going until we get a valid direction
		if (numtries >= MAXDIR_ORTH) { // no valid dirs 
			return D_NONE; // (pick a new random spot and refresh tried dirs and current dir) 
		}

		if (lastdir == D_UNKNOWN) {
			// just pick a random dir
			dir = rnd(0, MAXDIR_ORTH-1);
			turned = B_TRUE;
		} else {
			// chance of changing dir
			if (rnd(1,100) <= turnpct) {
				dir = rnd(0, MAXDIR_ORTH-1);
				turned = B_TRUE;
			} else {
				dir = lastdir;
			}
		}

		// now validate the direction
		if (db) dblog("--- Trying %s...\n",getdirname(dir));
		if (tried[dir] == B_TRUE) { // already found this dir to be invalid
			lastdir = D_UNKNOWN;
			if (db) dblog("--- Already know %s is invalid.\n",getdirname(dir));
		} else {
			// check 1 cell ahead
			newcell = getcellindir(cell, dir);
			if (isnewcellok(newcell, err)) {
				cell_t *newcell1, *newcell2;
				// check 2 cells ahead and sidewars
				newcell = getcellindir(newcell, dir);
				if (newcell) {
					switch (dir) {
						case D_N:
						case D_S:
							newcell1 = getcellindir(newcell,D_E);
							newcell2 = getcellindir(newcell,D_W);
							break;
						case D_E:
						case D_W:
							newcell1 = getcellindir(newcell,D_N);
							newcell2 = getcellindir(newcell,D_S);
							break;
						default: // should never happen
							newcell1 = NULL;
							newcell2 = NULL;
							break;
					}
				} else {
					newcell1 = NULL;
					newcell2 = NULL;
				}

				if (!isnewcellok(newcell, err)) {
					if (db) dblog("--- %s %s!\n",getdirname(dir), err);
					tried[dir] = B_TRUE;
					lastdir = D_UNKNOWN;
					numtries++;
				} else if (!isnewcellok(newcell1, err)) {
					if (db) dblog("--- %s %s!\n",getdirname(dir), err);
					tried[dir] = B_TRUE;
					lastdir = D_UNKNOWN;
					numtries++;
				} else if (!isnewcellok(newcell2, err)) {
					if (db) dblog("--- %s %s!\n",getdirname(dir), err);
					tried[dir] = B_TRUE;
					lastdir = D_UNKNOWN;
					numtries++;
				} else { // ok
					if (db) dblog("--- %s %s!\n",getdirname(dir), err);
					foundvaliddir = B_TRUE;
				}
			} else {
				if (db) dblog("--- %s %s!\n",getdirname(dir), err);
				tried[dir] = B_TRUE;
				lastdir = D_UNKNOWN;
				numtries++;
			} 
		}
	}
	//newcell = getcellindir(cell, dir);
	//printf("getrandomdigdir() - on cell %d,%d, returning dir %d (-> %d,%d)\n",
	//		cell->x, cell->y, dir, newcell->x, newcell->y);
	if (turned) *moved = 0;
	return dir;
}



cell_t *getrandomadjcell(cell_t *c, int wantempty, int allowexpand) {
	return real_getrandomadjcell(c, wantempty, allowexpand, LOF_NEED, NULL, NULL);
}

cell_t *real_getrandomadjcell(cell_t *c, int wantempty, int allowexpand, enum LOFTYPE needlof, enum OBTYPE *dontwantob, lifeform_t *preferlos) {
	int radius = 1;
	int x,y;
	cell_t *poss[MAXCANDIDATES];
	cell_t *losposs[MAXCANDIDATES];
	int nposs = 0,nlosposs = 0;
	cell_t *new,*sel = NULL;
	int done = B_FALSE;

	while (!done) {
		int numwithlof = 0;
		for (y = c->y - radius ; y <= c->y + radius ; y++) {
			for (x = c->x - radius ; x <= c->x + radius ; x++) {
				new = getcellat(c->map, x, y);
				if (new && 
					(new != c) && 
					(getcelldist(c,new) == radius) && 
					haslof(c, new, needlof, NULL)) {
					enum OBTYPE *badoid;
					int ok = B_FALSE;
					numwithlof++;
					if (wantempty == WE_EMPTY) {
						// make sure it's empty
						if (isempty(new)) {
							ok = B_TRUE;
						}
					} else if (wantempty == WE_WALKABLE) {
						if (cellwalkable(NULL, new, NULL)) {
							ok = B_TRUE;
						}
					} else if (wantempty == WE_PORTAL) {
						if (cellwalkable(NULL, new, NULL) && !hasenterableobject(new) ) {
							if (!hasobwithflag(new->obpile, F_DOOR)) {
								ok = B_TRUE;
							}
						}
					} else if (wantempty == WE_NOTWALL) {
						if ((!new->type->solid) && !hasobwithflag(new->obpile, F_IMPASSABLE)) {
						//if (!new->type->solid) {
							ok = B_TRUE;
						}
					} else if (wantempty == WE_NOLF) {
						if (!new->lf) ok = B_TRUE;
					} else if (wantempty == WE_SOLID) {
						if (new->type->solid) ok = B_TRUE;
					} else {
						// always ok
						ok = B_TRUE;
					}

					// obs we dont want?
					if (dontwantob) {
						for (badoid = dontwantob; (*badoid != OT_NONE) ; badoid++) {
							if (hasob(new->obpile, *badoid)) {
								ok = B_FALSE;
								break;
							}
						}
					}

					if (ok) {
						if (preferlos && haslos(preferlos, new)) {
							losposs[nlosposs++] = new;
						}
						poss[nposs++] = new;
					}
				}
			}
		}

		// found any possibilities ?
		if (nposs) {
			done = B_TRUE;
		} else {
			if (allowexpand) {
				if (numwithlof) {
					// increment radius
					radius++;
				} else {
					return NULL;
				}
			} else {
				return NULL;
			}
		}
	}

	// select a random cell
	if (preferlos && nlosposs) {
		sel = losposs[rnd(0,nlosposs-1)];
	} else {
		sel = poss[rnd(0,nposs-1)];
	}
	return sel;
}

cell_t *getrandomcell(map_t *map) {
	int x,y;
	cell_t *cell;
	x = (rand() % map->w);
	y = (rand() % map->h);
	cell = getcellat(map, x, y);
	assert(cell);
	return cell;
}

cell_t *getrandomcelloftype(map_t *map, enum CELLTYPE id) {
	cell_t *cell;
	cell = getrandomcell(map);
	while (cell->type->id != id) {
		cell = getrandomcell(map);
	}
	return cell;
}

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


int getrandomdir(int dirtype) {
	if (dirtype == DT_ORTH) {
		return rnd(D_N, D_W);
	} else { // ie. DT_COMPASS
		return rnd(DC_N, DC_NW);
	}
	
}
int getrandomdirexcept(int dirtype, int exception) {
	int dir;
	dir = exception;
	while (dir == exception) {
		if (dirtype == DT_ORTH) {
			dir = rnd(D_N, D_W);
		} else { // ie. DT_COMPASS
			dir = rnd(DC_N, DC_NW);
		}
	}
	return dir;
}

cell_t *getrandomroomcell(map_t *map, int roomid) {
        int npossible = 0;
        int selidx;
        int x,y;
	cell_t *c, **poss;

	poss = malloc((map->w*map->h) * sizeof(cell_t));

	npossible = 0;
        for (y = 0; y < map->h; y++) {
                for (x = 0; x < map->w; x++) {
			c = getcellat(map, x, y);	
			// is this cell in the correct room and not a wall?
			// using c->type->solid in case we have a room 
			// filled with boulders 
			//if (c && cellwalkable(NULL, c, NULL)) {
			if (c && !c->type->solid) {
				int ok = B_FALSE;
				if (getroomid(c) == roomid) {
					ok = B_TRUE;
				} else if (roomid == ANYROOM) {
					if (isroom(c)) {
						ok = B_TRUE;
					}
				}

				if (ok) {
					poss[npossible] = c;
					npossible++;
				}
                        }
                }
        }
        if (npossible <= 0) {
		free(poss);
		return NULL;
        }

        selidx = rnd(0, npossible-1);
	c = poss[selidx];
	free(poss);
	return c;
}

// popuplates retcell[] with all cells from room
void getroomcells(map_t *m, int roomid, cell_t **retcell, int *ncells) {
	int i;
	cell_t *c;
	*ncells = 0;
	for (i = 0; i < m->w*m->h; i++) {
		c = m->cell[i];
		if (c && (getroomid(c) == roomid)) {
			retcell[*ncells] = c;
			(*ncells)++;
		}
	}
}

// returns how slippery this cell is
// if slipob is set, return the most slippery object in it.
int getslipperyness(cell_t *c, object_t **slipob) {
	object_t *o,*bestob = NULL;
	int bestslip = 0;
	int totalslip = 0;
	int addition = 0; 
	if (slipob) *slipob = NULL;

	switch (c->type->id) {
		case CT_FLOORTILE: addition = 2; break;
		case CT_FLOORCARPET: addition = -2; break;
		default: addition = 0; break;
	}

	for (o = c->obpile->first ; o ; o = o->next) {
		int thisslip;
		sumflags(o->flags, F_SLIPPERY, &thisslip, NULL, NULL);
		thisslip += addition;
		limit(&thisslip, 0, NA);
		if (thisslip > 0) {
			if (thisslip > bestslip) {
				bestob = o;
				bestslip = thisslip;
			}
			thisslip *= o->amt;
			totalslip += thisslip;
		}
	}

	totalslip *= 2;

	if (slipob) {
		*slipob = bestob;
	}

	return totalslip;
}

// if madenewmap is passed, then we'll try to make a new map for stairs with no endpoint
cell_t *getstairdestination(object_t *o, int *madenewmap) {
	flag_t *f;
	cell_t *newcell = NULL;

	f = hasflag(o->flags, F_MAPLINK);
	if (f) {
		map_t *newmap;
		int newx,newy;
		newmap = findmap(f->val[0]);
		assert(newmap);
		// prefer an object id if we have it
		if (strlen(f->text)) {
			object_t *o2;
			long obid;
			obid = atol(f->text);
			o2 = findobidinmap(newmap, obid);
			if (o2) {
				newcell = getoblocation(o2);
			} else {
				dblog("stairs link to object %ld which no longer exists!",obid);
				msg("stairs link to object %ld which no longer exists!",obid);
				return NULL;
			}
		} else {
			// otherwise look for x/y coors
			newx = f->val[1];
			newy = f->val[2];
			// find dst x/y
			newcell = getcellat(newmap, newx, newy);
		}
	}

	if (!newcell && madenewmap) {
		cell_t *obcell = NULL;
		map_t *newmap,*curmap;
		region_t *newregion = NULL;
		int dir,newdepth;

		obcell = getoblocation(o);
		curmap = obcell->map;

		f = hasflag(o->flags, F_CLIMBABLE);
		if (!f) return NULL;

		dir = getstairdirection(o);
		if ((dir != D_UP) && (dir != D_DOWN)) {
			// ie this is a portal
			return NULL;
		} else {
			if (dir == D_UP) newdepth = curmap->depth - 1;
				else newdepth = curmap->depth + 1;
			if (f->val[1] == NA) {
				// use same region
				newregion = obcell->map->region;
			} else {
				newregion = findregion(f->val[1]);
			}
		}

		// is there already a level of the correct depth?
		newmap = findregionmap(newregion->id, newdepth);
		if (newmap) {
			dblog("ERROR - unlinked stairs! should have been linked during map creation.\n");
			msg("ERROR - unlinked stairs! should have been linked during map creation.\n");
			return NULL;
		} else {
			// generate a new map! this will fill in the destination of our stairs
			newmap = addmap();
			// first map of a newly created region?
			if (newregion->id != curmap->region->id) {
				newdepth = 1;
			}
			createmap(newmap, newdepth, newregion, curmap, dir, o);
			// at this point, stairs should have a destination (map creation will
			// fill it in)
			newcell = getstairdestination(o, NULL); // recursive call
			*madenewmap = B_TRUE;
		}

	}
	return newcell;
}

object_t *hasenterableobject(cell_t *c) {
	return hasobwithflag(c->obpile, F_CLIMBABLE);
}

object_t *hascloseddoor(cell_t *c) {
	object_t *o;
	int isopen;
	for (o = c->obpile->first ; o ; o = o->next) {
		if (isdoor(o, &isopen)) {
			if (!isopen) {
				return o;
			}
		}
	}
	return NULL;
}

int hascrushableob(cell_t *c, lifeform_t *lf) {
	object_t *o;
	if (lfhasflag(lf, F_CAREFULMOVE)) {
		return B_FALSE;
	}
	for (o = c->obpile->first ; o;  o = o->next) {
		if (cancrush(lf, o)) return B_TRUE;
	}
	return B_FALSE;
}

lifeform_t *haslf(cell_t *c) {
	if (c->lf && !isdead(c->lf)) {
		return c->lf;
	}
	return NULL;
}

int hasobject(cell_t *c) {
	if (c->obpile->first) {
		return B_TRUE;
	}
	return B_FALSE;
}

int hasknownobject(cell_t *c) {
	object_t *o;
	for (o = c->obpile->first ; o ; o = o->next) {
		if (o && canseeob(player, o)) {
			return B_TRUE;
		}
	}
	return B_FALSE;
}

object_t *hastrailof(obpile_t *op, lifeform_t *lf, enum OBTYPE oid, flag_t **tflag, lifeform_t *viewer) {
	object_t *o;
	flag_t *f;
	// default
	if (tflag) *tflag = NULL;
	for (o = op->first ; o ; o = o->next) {
		if (viewer && !canseeob(viewer, o)) continue;
		if ((oid == NA) || (o->type->id == oid)) {
			f = hasflag(o->flags, F_TRAIL);
			// raceid and lfid must match
			if (f) {
				if ((f->val[0] == lf->race->id) && (atoi(f->text) == lf->id)) {
					if (tflag) {
						*tflag = f;
					}
					return o;
				}
			}
		}
	}
	return NULL;
}


void initmap(void) {
	// habitats
	//                                           thingchance, obchance, vaultchance, maxvisrange, upstiartype, downstairtype
	addhabitat(H_DUNGEON, "dungeon", CT_CORRIDOR, CT_WALL, 3, 50, 30, 6, OT_STAIRSUP, OT_STAIRSDOWN);
	addhabitat(H_CAVE, "cave", CT_DIRT, CT_WALLDIRT, 5, 65, 10, 6, OT_TUNNELUP, OT_TUNNELDOWN);
	addhabitat(H_FOREST, "forest", CT_GRASS, CT_WALL, 3, 75, 0, MAXVISRANGE, OT_NONE, OT_NONE);
	addhabitat(H_HEAVEN, "heaven", CT_CORRIDOR, CT_WALLGLASS, 5, 0, 0, MAXVISRANGE, OT_NONE, OT_NONE);
	addhabitat(H_PIT, "pit", CT_CORRIDOR, CT_WALL, 0, 0, 0, 5, OT_NONE, OT_NONE);
	addhabitat(H_VILLAGE, "village", CT_GRASS, CT_WALL, 3, 70, 0, MAXVISRANGE, OT_NONE, OT_NONE);
	addhabitat(H_SEWER, "sewer", CT_CORRIDOR, CT_WALL, 5, 50, 0, MAXVISRANGE, OT_NONE, OT_NONE);
	addhabitat(H_STOMACH, "stomach", CT_FLOORFLESH, CT_WALLFLESH, 5, 80, 0, MAXVISRANGE, OT_NONE, OT_NONE);
	addhabitat(H_SWAMP, "swamp", CT_CORRIDOR, CT_WALL, 3, 50, 0, MAXVISRANGE, OT_STAIRSUP, OT_STAIRSDOWN);

	// cell types - solid
	//                                                                                    floorheight, hp
	addcelltype(CT_WALL, "rock wall", UNI_SHADEDARK, C_GREY, B_SOLID, B_OPAQUE, MT_STONE, 0, 50);
	addcelltype(CT_WALLBRICK, "brick wall", UNI_SHADEDARK, C_ORANGE, B_SOLID, B_OPAQUE, MT_STONE, 0, 40);
	addcelltype(CT_WALLDIRT, "dirt wall", UNI_SHADEDARK, C_BROWN, B_SOLID, B_OPAQUE, MT_STONE, 0, 20);
	addcelltype(CT_WALLWOOD, "wooden wall", UNI_SOLID, C_BROWN, B_SOLID, B_OPAQUE, MT_WOOD, 0, 30);
	addcelltype(CT_WALLFLESH, "flesh wall", UNI_SOLID, C_RED, B_SOLID, B_OPAQUE, MT_FLESH, 0, 25);
	addcelltype(CT_WALLGLASS, "glass wall", UNI_SOLID, C_CYAN, B_SOLID, B_TRANS, MT_GLASS, 0, 20);
	addcelltype(CT_WALLMETAL, "metal wall", UNI_SOLID, C_WHITE, B_SOLID, B_OPAQUE, MT_METAL, 0, 75);
	// cell types - non-solid
	addcelltype(CT_FAKE, "fake cell", '.', C_GREEN, B_EMPTY, B_TRANS, MT_STONE, 0, -1);
	addcelltype(CT_CORRIDOR, "rock floor", '.', C_GREY, B_EMPTY, B_TRANS, MT_STONE, 0, -1);
	addcelltype(CT_LOOPCORRIDOR, "rock floor", 'L', C_GREY, B_EMPTY, B_TRANS, MT_STONE, 0, -1);
	addcelltype(CT_FLOORCARPET, "carpetted floor", '.', C_YELLOW, B_EMPTY, B_TRANS, MT_CLOTH, 0, -1);
	addcelltype(CT_FLOORWOOD, "wood floor", '.', C_BROWN, B_EMPTY, B_TRANS, MT_WOOD, 0, -1);
	addcelltype(CT_FLOORFLESH, "flesh floor", '.', C_RED, B_EMPTY, B_TRANS, MT_FLESH, 0, -1);
	addcelltype(CT_FLOORSHOP, "shop floor", '.', C_BROWN, B_EMPTY, B_TRANS, MT_WOOD, 0, -1);
	addcelltype(CT_FLOORTILE, "tiled floor", '.', C_WHITE, B_EMPTY, B_TRANS, MT_METAL, 0, -1);
	addcelltype(CT_GRASS, "grass", '.', C_GREEN, B_EMPTY, B_TRANS, MT_PLANT, 0, -1);
	addcelltype(CT_DIRT, "dirt", '.', C_BROWN, B_EMPTY, B_TRANS, MT_STONE, 0, -1);
	addcelltype(CT_LOWFLOOR, "low rock floor", '.', C_GREY, B_EMPTY, B_TRANS, MT_STONE, -1, -1);
	addcelltype(CT_VLOWFLOOR, "very low rock floor", '.', C_GREY, B_EMPTY, B_TRANS, MT_STONE, -2, -1);

	// region types
	//                                                       maxdepth  stairs  stair   major?   depthmod
	//                                                                 perlev  dir
	addregiontype(RG_WORLDMAP, "The Surface", B_FALSE, H_FOREST, 10,   0,      D_NONE, B_TRUE,  0);
	addregiontype(RG_MAINDUNGEON, "The Main Dungeon", B_FALSE, H_DUNGEON, 25, 3, D_DOWN, B_TRUE, 0);
	addregiontype(RG_CAVE, "The Goblin Caves", B_TRUE, H_CAVE, 5, 1, D_DOWN, B_TRUE, 2);
	addregiontype(RG_HEAVEN, "The Realm of Gods", B_FALSE, H_HEAVEN, 1, 0, D_NONE, B_FALSE, 0);
	addregiontype(RG_PIT, "A Pit", B_FALSE, H_PIT, 1, 1, D_DOWN, B_FALSE, 0);
	addregiontype(RG_SEWER, "A Sewer", B_FALSE, H_SEWER, 1, 0, D_NONE, B_FALSE, 2);
	addregiontype(RG_STOMACH, "A Stomach", B_FALSE, H_STOMACH, 1, 0, D_NONE, B_FALSE, 0);
	
}


void initmaplayout(void) {
	//int vx[4],vy[4];
	int i;
	// MAPMAPMAPMAP
	// region definitions (outlines)
	addregionoutline(RG_WORLDMAP);
		// link to first dungeon
		addregionthing(lastregionoutline, NA, 0, 0, RT_REGIONLINK, RG_MAINDUNGEON, "staircase going down");
		/*
		// four villages
		for (i = 0; i < 4; i++) {
			vx[i] = 0; vy[i] = 0;
			while ((vx[i] == 0) && (vy[i] == 0)) {
				int n, distfromcentre;
				distfromcentre = 2 + (i*2);
				vx[i] = rnd(-distfromcentre,distfromcentre);
				vy[i] = rnd(-distfromcentre,distfromcentre);
				// check for other villages in this map...
				for (n = 0; n < i; n++) {
					if ((vx[n] == vx[i]) && (vy[n] == vy[i])) {
						vx[i] = 0; vy[i] = 0; // invalidate!
						break;
					}
				}
			}
			addregionthing(lastregionoutline, NA, vx[i], vy[i], RT_HABITAT, H_VILLAGE, NULL);
				addregionthing(lastregionoutline, NA, vx[i], vy[i], RT_VAULT, NA, "food_shop");
				addregionthing(lastregionoutline, NA, vx[i], vy[i], RT_VAULT, NA, "pub");
				addregionthing(lastregionoutline, NA, vx[i], vy[i], RT_RNDVAULTWITHFLAG, F_VAULTISSHOP, NULL);
				addregionthing(lastregionoutline, NA, vx[i], vy[i], RT_RNDVAULTWITHFLAG, F_VAULTISSHOP, NULL);
				addregionthing(lastregionoutline, NA, vx[i], vy[i], RT_RNDVAULTWITHFLAG, F_VAULTISSHOP, NULL);
		}
		//vx = 0; vy = -1;
		*/

	addregionoutline(RG_MAINDUNGEON);
		addregionthing(lastregionoutline, 1, NA, NA, RT_RNDVAULTWITHFLAG, F_VAULTISPLAYERSTART, NULL);
		// l2-4: goblin caves
		addregionthing(lastregionoutline, rnd(2,4), NA, NA, RT_REGIONLINK, RG_CAVE, "tunnel leading down");
		// l6: jimbo's lair
		addregionthing(lastregionoutline, 6, NA, NA, RT_VAULT, NA, "jimbos_lair");
		// l7 - 10: swamp 
		addregionthing(lastregionoutline, rnd(7,10), NA, NA, RT_HABITAT, H_SWAMP, NULL);
		// l25: last level
		addregionthing(lastregionoutline, 25, NA, NA, RT_RNDVAULTWITHFLAG, F_VAULTISSHRINE, NULL); // godstone on last floor

		// 1-3 fixed sewers
		addregionthing(lastregionoutline, rnd(1,25), NA, NA, RT_REGIONLINK, RG_SEWER, "drainage grate");
		for (i = 0; i < 2; i++) {
			if (onein(2)) { 
				addregionthing(lastregionoutline, rnd(1,25), NA, NA, RT_REGIONLINK, RG_SEWER, "drainage grate");
			}
		}
		

		// forced shops:
		addregionthing(lastregionoutline, rnd(2,4), NA, NA, RT_OBJECT, NA, "random building");
		addregionthing(lastregionoutline, rnd(5,7), NA, NA, RT_OBJECT, NA, "random building");
		addregionthing(lastregionoutline, rnd(8,10), NA, NA, RT_OBJECT, NA, "random building");
		addregionthing(lastregionoutline, rnd(11,13), NA, NA, RT_OBJECT, NA, "random building");
		addregionthing(lastregionoutline, rnd(14,16), NA, NA, RT_OBJECT, NA, "random building");
		addregionthing(lastregionoutline, rnd(17,19), NA, NA, RT_OBJECT, NA, "random building");
		addregionthing(lastregionoutline, rnd(20,22), NA, NA, RT_OBJECT, NA, "random building");
		addregionthing(lastregionoutline, rnd(23,25), NA, NA, RT_OBJECT, NA, "random building");

	addregionoutline(RG_CAVE);
		addregionthing(lastregionoutline, 5, NA, NA, RT_RNDVAULTWITHTAG, NA, "caveboss");

	// add initial regions
	addregion(RG_WORLDMAP, NULL, -1, 0, -1);
	addregion(RG_HEAVEN, NULL, -1, 0, -1);
}

int isadjacent(cell_t *src, cell_t *dst) {
	if (getcelldist(src, dst) == 1) {
		return B_TRUE;
	}
	return B_FALSE;
}

int isdark(cell_t *c) {
	switch (c->lit) {
		case L_PERMDARK:
		case L_NOTLIT:
			return B_TRUE;
		default:
			break;
	}
	return B_FALSE;
}

int isdiggable(cell_t *c) {
	switch (c->type->id) {
		case CT_WALLFLESH: 
		case CT_WALLDIRT:
		case CT_WALL: 
			return B_TRUE;
		default:
			break;
	}
	return B_FALSE;
}

// if isopen provided, returns whether or not the door is opened 
int isdoor(object_t *o, int *isopen) {
	int isdoor = B_FALSE;
	if (hasflag(o->flags, F_DOOR)) {
		isdoor = B_TRUE;
	} else {
		isdoor = B_FALSE;
	}

	if (isdoor) {
		if (isopen) {
			if (hasflag(o->flags, F_OPEN)) {
				*isopen = B_TRUE;
			} else {
				*isopen = B_FALSE;
			}
		}
	}
	return isdoor;
}

int isempty(cell_t *c) {
	if (!c) return B_FALSE;
	if (c->type->solid) return B_FALSE;
	if (c->lf) return B_FALSE;
	if (!cellwalkable(NULL, c, NULL)) return B_FALSE;
	return B_TRUE;
}

//returns TT_  based on what you can scan there
int isinscanrange(cell_t *c, void **thing, char *desc, glyph_t *glyph) {
	flag_t *f;
        flag_t *retflag[MAXCANDIDATES];
        int nretflags;
	int i;
	// handle scanner
	if (c->lf) {
		if (areallies(player, c->lf) && !isplayer(c->lf) && canhear(player, c, SV_SHOUT)) {
			// assume that allies will keep in contact with the player, as long 
			// as they're not asleep
			if (!lfhasflag(c->lf, F_ASLEEP)) {
				set_scanned_glyph(TT_MONSTER, c->lf, " (heard ally)", desc, glyph);
				*thing = c->lf;
				return TT_MONSTER;
			}
		}

		f = lfhasflag(player, F_DETECTLIFE);
		if (f) {
			if (getcelldistorth(player->cell, c) <= f->val[0]) {
				*thing = c->lf;
				if (f->val[1] == B_TRUE) {
					set_scanned_glyph(TT_MONSTER, c->lf, " (detected)", desc, glyph);
				} else {
					if (desc) {
						char *p;
						p = getsizetext(getlfsize(c->lf));
						snprintf(desc, BUFLEN, "%s %s monster", isvowel(*p) ? "an" : "a", p);
					}
					if (glyph) {
						// select glyph based on size
						glyph->ch = '0' + ((int) getlfsize(c->lf));
						glyph->colour = C_GREY;
					}
				}
				return TT_MONSTER;
			}
		}
		f = lfhasflag(player, F_ENHANCESMELL);
		if (f && issmellablelf(c->lf)) {
			if (getcelldistorth(player->cell, c) <= f->val[0]) {
				set_scanned_glyph(TT_MONSTER, c->lf, " (smelled)", desc, glyph);
				*thing = c->lf;
				return TT_MONSTER;
			}
		} 
		if (lfhasflagval(player, F_CANHEARLF, c->lf->id, NA, NA, NULL)) {
			// can hear them using master level listen skill?
			set_scanned_glyph(TT_MONSTER, c->lf, " (heard)", desc, glyph);
			*thing = c->lf;
			return TT_MONSTER;
		}
		f = lfhasflagval(player, F_GRABBEDBY, c->lf->id, NA, NA, NULL);
		if (!f) {
                    f = lfhasflagval(c->lf, F_ATTACHEDTO, player->id, NA, NA, NULL);
		}
		if (!f) {
                    f = lfhasflagval(c->lf, F_UNSEENATTACKER, player->id, NA, NA, NULL);
		}
		if (f) {
			if (glyph) {
				glyph->ch = 'X';
				glyph->colour = C_GREY;
			}
			*thing = c->lf;
			if (desc) {
				getlfname(c->lf, desc);
				switch (f->id) {
					case F_GRABBEDBY:
						strcat(desc, " (holding you)");
						break;
					case F_ATTACHEDTO:
						strcat(desc, " (attached to you)");
						break;
					case F_UNSEENATTACKER:
						strcat(desc, " (unseen attacker)");
						break;
					default: 
						// should never happen
						strcat(desc, " (detected)");
						break;
				}
			}
			return TT_MONSTER;
		}
	}

	f = lfhasflag(player, F_DETECTMETAL);
	if (f) {
		if (getcelldistorth(player->cell, c) <= f->val[0]) {
			if (c->lf && ismetal(getlfmaterial(c->lf)) ) {
				*thing = c->lf;
				if (glyph) {
					glyph->ch = '*';
					glyph->colour = C_GREY;
				}
				if (desc) snprintf(desc, BUFLEN, "something metallic");
				return TT_MONSTER;
			} else {
				object_t *o;
				for (o = c->obpile->first ; o ; o = o->next) {
					if (ismetal(o->material->id)) {
						*thing = o;
						if (glyph) {
							glyph->ch = '*';
							glyph->colour = C_GREY;
						}
						if (desc) snprintf(desc, BUFLEN, "something metallic");
						return TT_OBJECT;
					}
				}
			}
		}
	} // end if hasflag detectmetal


	// get list of all detected ob ids.
	getflags(player->flags, retflag, &nretflags, F_DETECTOBS, F_ENHANCESMELL, F_NONE);
	for (i = 0; i < nretflags; i++) {
		f = retflag[i];
		if (getcelldistorth(player->cell, c) <= f->val[0]) {
			object_t *o;
			for (o = c->obpile->first ; o ; o = o->next) {
				if ((f->id == F_DETECTOBS) && ((f->val[1] == NA) || (o->type->id == f->val[1]))) {
					if (!hasflag(o->flags, F_NOPICKUP) && !hasflag(o->flags, F_DOOR)) {
						*thing = o;
						if (glyph) {
							glyph->ch = '*';
							glyph->colour = C_BOLDGREEN;
						}
						if (desc) {
							if (f->val[1] == NA) {
								strcpy(desc, "a detected object");
							} else {
								getobname(o, desc, o->amt);
							}
						}
						return TT_OBJECT;
					}
				} else if ((f->id == F_ENHANCESMELL) && issmellableob(o)) {
					if (getcelldistorth(player->cell, c) <= f->val[0]) {
						*thing = o;
						set_scanned_glyph(TT_OBJECT, o, " (smelled)", desc, glyph);
						return TT_OBJECT;
					}
				}
			}
		}
	}
	
	return B_FALSE;
}

int islit(cell_t *c) {
	switch (c->lit) {
		case L_TEMP:
		case L_PERMLIGHT:
			return B_TRUE;
		default:
			break;
	}
	return B_FALSE;
}


int isloopdirok(cell_t *cell, int dir) {
	int dirok = B_FALSE;
	cell_t *newcell;
	// is there a corridor in this direction?
	newcell = getcellindir(cell, dir);
	while (newcell) {
		// got a corridor?
		if (!newcell->type->solid) {
			dirok = B_TRUE;
			break;
		}
		// keep going
		newcell = getcellindir(newcell, dir);
	}

	// we've either gone off the map or
	// hit a corridor
	return dirok;
}

int isnewcellok(cell_t *cell, char *err) {
	if ( !cell ) { // can't go that way
		if (err) snprintf(err, BUFLEN,"goes off the map.");
		return B_FALSE;
	} else if ( cell->locked ) { // locked
		if (err) snprintf(err, BUFLEN,"locked.");
		return B_FALSE;
	} else if ( !cell->type->solid) { // already an empty space there
		if (err) snprintf(err, BUFLEN,"goes to an empty space (%d,%d)",cell->x,cell->y);
		return B_FALSE;
	} 

	// ok!
	if (err) snprintf(err, BUFLEN, "OK!");
	return B_TRUE;
}

int isnighttime(void) {
	int hours,mins,secs;
	splittime(&hours,&mins,&secs);
	if ((hours < 7) || (hours >= 19)) {
		return B_TRUE;
	}
	return B_FALSE;
}

int isonmap(map_t *map, int x, int y) {
	if ((x < 0) || (y < 0)) {
		return B_FALSE;
	}
	if ((x >= map->w) || (y >= map->h)) {
		return B_FALSE;
	}

	return B_TRUE;
}

int isoutdoors(map_t *m) {
	if (m->region && m->region->rtype->id == RG_WORLDMAP) {
		return B_TRUE;
	}
	return B_FALSE;
}

int isroom(cell_t *c) {
	if (c && (getroomid(c) >= 0)) {
		return B_TRUE;
	}
	return B_FALSE;
}

int iswallindir(cell_t *cell, int dir) {
	cell_t *newcell;
	newcell = getcellindir(cell, dir);
	if (!newcell) {
		return B_TRUE;
	}

	if (newcell->type->solid) {
		return B_TRUE;
	}

	return B_FALSE;
}

// search for unlinked pits/holes in roof in ADJACENT maps
// if we find any, add a matching end as close as we can in THIS map.
// returns then umber of holes linked.
int linkholes(map_t *map) {
	map_t *adjmap;
	cell_t *c;
	object_t *o, *newob;
	int x,y;
	int dir;
	int nlinked = 0;

	for (dir = D_UP ; dir <= D_DOWN; dir++) {
		adjmap = getmapindir(map, dir);
		if (adjmap) {
			for (y = 0; y < adjmap->h; y++) {
				for (x = 0; x < adjmap->w; x++) {
					c = getcellat(adjmap, x, y);
					if (c) {
						// does the adjacent map have an unlinked pit going to us?
						for (o = c->obpile->first ; o ; o = o->next) {
							if (hasflagval(o->flags, F_PIT, diropposite(dir), NA, NA, NULL) &&
							    !hasflag(o->flags, F_MAPLINK)) {
								cell_t *c2;
								objecttype_t *ot;
								ot = getoppositestairs(o->type);
								// make a link to it in this map, as close as possible to same pos
								c2 = getcellat(map, x, y);
								if (c2->lf || hasobid(c2->obpile, ot->id)) {	
									// this will automatically avoid lifeforms since we're using
									// we_walkable rather than we_notwall.  this saves problems
									// with someine coming up underneath you!
									c2 = real_getrandomadjcell(c2, WE_NOLF, B_ALLOWEXPAND, LOF_DONTNEED, &ot->id, NULL);
								}
								// clear out the cell if required
								if (c2->type->solid) {
									setcelltype(c2, getcellempty(c2));
								}
								// note we specifically say DONT link the new hole, to avoid an infinite
								// loop!
								newob = addobject(c2->obpile, NULL, B_FALSE, B_FALSE, ot->id);
								// link holes manually now.
								linkstairs(newob, o);

								// objects above fall down
								if (dir == D_UP) {
									obsfallthrough(c, o);
								} else {
									obsfallthrough(c2, newob);
								}
								nlinked++;
							}
						}
					}
				}
			}
		}
	}
	return nlinked;
}

object_t *linkportal(object_t *srcportal, int wantdepth) {
	cell_t *srcloc,*newcell;
	map_t *newmap = NULL;
	object_t *dstportal = NULL;

	srcloc = getoblocation(srcportal);
	newmap = findregionmap(srcloc->map->region->id, wantdepth);
	if (!newmap) {
		// create new map
		newmap = addmap();
		createmap(newmap, wantdepth, srcloc->map->region, NULL, D_NONE, NULL); 
	}
	
	// find a random cell there
	newcell = getrandomcell(newmap);
	while (!cellwalkable(NULL, newcell, NULL) || hasenterableobject(newcell) || getcellwaterdepth(newcell, NULL)) {
		newcell = getrandomcell(newmap);
	}
	// add the dst portal
	dstportal = addob(newcell->obpile, "magic portal");
	assert(dstportal);

	// link the dst portal
	addflag_real(dstportal->flags, F_MAPLINK, srcloc->map->id, srcloc->x, srcloc->y, NULL, PERMENANT, B_FALSE, -1);

	// link the source portal
	addflag_real(srcportal->flags, F_MAPLINK, newmap->id, newcell->x, newcell->y, NULL, PERMENANT, B_FALSE, -1);

	return dstportal;
}

// link the staircase 'o' to a free one in adjacent maps.
// o2 is optional.  if o2 isn't provided, we will try to find 
// something to link to ourself.
//	returns TRUE if it failed because othermap doesn't exist.
int linkstairs(object_t *o, object_t *o2) {
	map_t *othermap;
	map_t *stairmap;
	cell_t *staircell;
	flag_t *f;

	assert(o);

	staircell = getoblocation(o);
	stairmap = staircell->map;
	
	if (o2) {
		cell_t *othercell;
		othercell = getoblocation(o2);
		othermap = othercell->map;
	} else {
		objecttype_t *otherstairtype;
		cell_t *c2;
		int n, dir;
		object_t *oo;
		// find a valid other end
		otherstairtype = getoppositestairs(o->type);

		f = hasflag(o->flags, F_CLIMBABLE);
		if (f) {
			if (f->val[0] == D_UP) {
				dir = -1;
			} else {
				dir = 1;
			}
		} else {
			dblog("ERROR: stair object has no f_climbable!");
			msg("ERROR: stair object has no f_climbable!");
			assert(0 == 1);
		}

		// do stairs go to a particular region?
		if (f->val[1] != NA) {
			// if so, find the first map in that region (ie depth 1)
			othermap = findregionmap(f->val[1], 1);
		} else {
			othermap = getmapindir(stairmap, f->val[0]);
		}
		if (othermap) {
			int found = B_FALSE;
			object_t *poss[MAXCANDIDATES];
			int nposs = 0;
			// find an empty staircase of the correct type in the other map
			for (n = 0; n < othermap->w*othermap->h; n++) {
				c2 = othermap->cell[n];
				oo = hasob(c2->obpile, otherstairtype->id);
				if (oo) {
					// remember all stairs of correct type, for debugging.
					poss[nposs++] = oo;
					// does it go nowhere?
					if (!hasflag(oo->flags, F_MAPLINK)) {
						o2 = oo;
						found = B_TRUE;
						break;
					}
				}
			}
			if (!found) {
				dblog("ERROR - stairs should link to existing map ('%s', depth %d), but it has no free stairs.",
							othermap->name, othermap->depth);
				msg("ERROR - stairs should link to existing map ('%s', depth %d), but it has no free stairs.", 
							othermap->name, othermap->depth);
				more();
				raise(SIGINT); // debug
			}
		} // end if othermap
	} // end if !o2


	if (o2) {
		char obid[BUFLEN];
		// link it to here!
		snprintf(obid, BUFLEN, "%ld", o->id);
		addflag(o2->flags, F_MAPLINK, stairmap->id, NA, NA, obid);
		// link me to there
		snprintf(obid, BUFLEN, "%ld", o2->id);
		addflag(o->flags, F_MAPLINK, othermap->id, NA, NA, obid);
		// now mark that we are not a new staircase to a new region anymore
		f = hasflag(o->flags, F_CLIMBABLE);
		if (f) {
			f->val[1] = NA;
		}
	} else {
		return B_TRUE;
	}

	return B_FALSE;
}

void makedoor(cell_t *cell, int openchance) {
	object_t *o;
	map_t *m;
	char doorbuf[BUFLEN];

	// can't have more than one door in a cell
	if (hasobwithflag(cell->obpile, F_DOOR)) {
		return;
	}

	m = cell->map;

	setcelltype(cell, getcellempty(cell));

	if ((rnd(1,100) + m->depth) >= 66) {
		strcpy(doorbuf, "iron door");
	} else {
		strcpy(doorbuf, "wooden door");
	}

	// addob will determine whether the door is locked. if so,
	// don't open it!
	o = addob(cell->obpile, doorbuf);
	if (o) {
		if (!hasflag(o->flags, F_LOCKED) && (rnd(1,100) <= openchance)) {
			opendoor(NULL, o);
		} else {
			int chance;
			//  door might be secret?
			chance = rolldie(1,6) - (m->depth / 10);

			// difficulty:
			//   l1 = 20
			//   l10 = 25
			//   l20 = 30
			if (chance <= 1) {
				addflag(o->flags, F_SECRET, getdoorsecretdiff(m->depth), NA, NA, NULL);
			}
		}
	}
}



void makelit(cell_t *c, enum LIGHTLEV how, int howlong) {
	enum LIGHTLEV origlit;

	// don't override permenant light with temp light!
	//if ((c->lit == L_PERMLIGHT) && (how == L_TEMP)) {
	if (how == L_TEMP) {
		//if ((c->lit == L_PERMLIGHT) || (c->lit == L_PERMDARK)) {
		if (c->lit == L_PERMLIGHT) {
			// light sources can't override permenant light
			return;
		}
		if (c->lit == L_PERMDARK) {
			// light sources can't override darkness spell
			return;
		}
	}

	origlit = c->lit;

	if (howlong > 0) {
		// TODO: use a stack here instead
		c->origlit = c->lit;
		c->origlittimer = c->littimer;
		c->littimer = howlong;
	}

	if (how != origlit) {
		//if ((gamemode == GM_GAMESTARTED) && (c->lit != how)) {
		if (gamemode == GM_GAMESTARTED) {
			lifeform_t *lf;
			for (lf = c->map->lf ; lf ; lf = lf->next) {	
				//if (haslos(lf, c) || haslosdark(lf, c)) {
				if ((lf->cell == c) || haslos(lf, c)) {
					setlosdirty(lf);
				}
			}
		}
	}
	c->lit = how;
}

void makelitradius(cell_t *c, int radius, enum LIGHTLEV how, int howlong) {
	int x,y;
	cell_t *c2;
	int (*distfunc)(cell_t *, cell_t *);

	if (radius <= 0) return;

	if (radius == 1) {
		distfunc = getcelldist;
	} else {
		distfunc = getcelldistorth;
	}

	for (y = c->y - radius ; y <= c->y + radius; y++) {
		for (x = c->x - radius ; x <= c->x + radius; x++) {
			c2 = getcellat(c->map, x, y);
			if (c2 && (distfunc(c, c2) <= radius)) {
				if (cellhaslos(c,c2)) {
					makelit(c2, how,howlong);
				}
			}
		}
	}

	// now setlos dirty for lfs who can see any of the cells.
	// while makelit() does this as well, we need to do it 
	// again here because makelit also contains calls to "haslos",
	// which clears lf->losdirty again.  This is fine when we're only
	// changing one cell's light level, but when changing multiple
	// cells we need to go through again afterwards.

	if (gamemode == GM_GAMESTARTED) {
		lifeform_t *lf;
		for (lf = c->map->lf ; lf ; lf = lf->next) {	
			//OLD: if (haslos(lf, c) || haslosdark(lf, c)) {
			// need to verify lf->cell because it might be NULL if we're
			// swapping places with someone else.
			if (lf->cell && (distfunc(lf->cell,c) <= (radius + MAXVISRANGE))) {
				setlosdirty(lf);
			}
		}
	}
}

void markroomwalls(map_t *m, room_t *r) {
	int x,y;
	cell_t *c,*c2;
	// N edge
	for (x = r->x1+1; x <= r->x2-1; x++) {
		for (y = r->y1; y <= r->y2; y++) {
			c = getcellat(m, x, y);
			if (c->type->solid) {
				c2 = getcellindir(c, DC_S);
				if (c2 && !c2->type->solid) {
					c->isroomwall = DC_N;
				}
			}
		}
	}
	// W edge
	for (y = r->y1+1; y <= r->y2-1; y++) {
		for (x = r->x2; x >= r->x1; x--) {
			c = getcellat(m, x, y);
			if (c->type->solid) {
				c2 = getcellindir(c, DC_W);
				if (c2 && !c2->type->solid) {
					c->isroomwall = DC_E;
				}
			}
		}
	}
	// S edge
	for (x = r->x1+1; x <= r->x2-1; x++) {
		for (y = r->y2; y >= r->y1; y--) {
			c = getcellat(m, x, y);
			if (c->type->solid) {
				c2 = getcellindir(c, DC_N);
				if (c2 && !c2->type->solid) {
					c->isroomwall = DC_S;
				}
			}
		}
	}
	// W edge
	for (y = r->y1+1; y <= r->y2-1; y++) {
		for (x = r->x1; x <= r->x2; x++) {
			c = getcellat(m, x, y);
			if (c->type->solid) {
				c2 = getcellindir(c, DC_E);
				if (c2 && !c2->type->solid) {
					c->isroomwall = DC_W;
				}
			}
		}
	}
}

void mapentereffects(map_t *m) {
	int i;
	cell_t *c;
	//flag_t *f;
	for (i = 0; i < m->w * m->h; i++) {
		vault_t *v;
		c = m->cell[i];
		v = getcellvault(c);
		/*
		// teleport shopkeepers back to their shops
		if (c->lf && hasjob(c->lf, J_SHOPKEEPER) && !isplayer(c->lf)) {
			f = lfhasflag(c->lf, F_OWNSSHOP);
			if (f) {
				cell_t *where;
				int myshop;
				myshop = f->val[0];
				// find the closest cell of my shop
				where = getclosestroomcell(c->lf, myshop);
				if (where) {
					movelf(c->lf, where);
				}
			}
		}
		// replace people in the Inn
		if (v && streq(v->id, "inn") && c->lf && (c->lf->race->id == R_HUMAN)) {
			lifeform_t *lf;
			killlf(c->lf);
			lf = addmonster(c, R_HUMAN, NULL, B_TRUE, 1, B_FALSE, NULL);
			addflag(lf->flags, F_STAYINROOM, getroomid(c), B_MAYCHASE, NA, NULL);
		}
		*/
	}

	// monsters on the new level now get a bunch of turns to simulate them moving about when the player wasn't there.
	if (m->lastplayervisit != -1) {
		int nturns;

		enteringmap = B_TRUE;

		nturns = (curtime - m->lastplayervisit) / TICK_INTERVAL;
		limit(&nturns, NA, 20); 
		//nturns *= countlfs(m);
		for (i = 0; i < nturns; i++) {
			donextturn(m);
		}
		enteringmap = B_FALSE;
	}
}

void moveobtoclearcell(object_t *o) {
	cell_t *c,*startcell;
	startcell = getoblocation(o);

	c = startcell;
	while ((c == startcell) || 
		!cellwalkable(NULL, c, NULL) || 
		hasobwithflag(c->obpile, F_CLIMBABLE) ||
		hasobwithflag(c->obpile, F_DEEPWATER) ) {
		c = getrandomcell(startcell->map);
	}

	moveob(o, c->obpile, ALL);
}

enum RACE parserace(char *name, flagpile_t *wantflags, enum JOB *wantjob) {
	int donesomething;
	char *p;
	job_t *j;

	// get params
	donesomething = B_TRUE;
	p = name;
	while (donesomething) {
		donesomething = B_FALSE;
		if (strstarts(p, "sleeping ")) {
			p += strlen("sleeping ");
			if (wantflags) addflag(wantflags, F_ASLEEP, NA, ST_ASLEEP, NA, NULL);
			donesomething = B_TRUE;
		}
	}

	// try removing suffixes for jobs
	for (j = firstjob ; j ; j = j->next) {
		char *ep;
		char jobname[BUFLEN];
		snprintf(jobname, BUFLEN, " %s", j->name);
		jobname[1] = tolower(jobname[1]);
		ep = strends(name, jobname);
		if (ep) {
			// got it
			if (wantjob) *wantjob = j->id;
			// now strip the suffix off, starting at the space before it
			*ep = '\0';
			break;
		}
	}

	// now get raceid
	if (streq(p, "random")) {
		return R_RANDOM;
	} else {
		race_t *r;
		r = findracebyname(p);
		if (r) {
			return r->id;
		} 
	}
	return R_NONE;
}

// returns # of dead ends removed.
int remove_deadends(map_t *m, int howmuch) {
	enum CELLTYPE solidcell;
	int i,n,count = 0;

	solidcell = getmapsolid(m);
	
	for (i = 0; i < howmuch; i++) {
		for (n = 0; n < m->w * m->h; n++) {
			cell_t *c;
			c = m->cell[n];
			if (!c->room && (countcellexits(c, DT_ORTH) == 1)) {
				// erase this cell	
				clearcell(c);
				setcelltype(c, solidcell);
				count++;
			}
		}
	}
	return count;
}
	
void set_scanned_glyph(int targettype, void *what, char *descappend, char *desc, glyph_t *glyph) {
	if (targettype == TT_MONSTER) {
		if (desc) {
			real_getlfnamea((lifeform_t *)what, desc, B_FALSE, B_FALSE);
			strcat(desc, descappend);
		}
		if (glyph) {
			*glyph = *(getlfglyph((lifeform_t *) what));
		}
	} else if (targettype == TT_OBJECT) {
		object_t *o;
		o = (object_t *)what;
		if (desc) {
			getobname(o, desc, o->amt);
			strcat(desc, descappend);
		}
		if (glyph) {
			*glyph = *(getglyph(o));
		}
	}
}


void setcellknown(cell_t *cell, int forcelev) {
	enum SKILLLEVEL slev;
	object_t *o;
	if (forcelev > 0) {
		slev = forcelev;
	} else {
		slev = getskill(player, SK_CARTOGRAPHY);
	}

	cell->known = B_TRUE;
	// default to remembering the cell's glyph, or a wall if there's a secret door there
	o = hassecretdoor(cell->obpile);
	if (o) {
		celltype_t *ct;
		ct = findcelltype(getcellsolid(cell));
		cell->knownglyph = ct->glyph;
	} else {
		cell->knownglyph = cell->type->glyph; 
	}

	// high cartography skill lets us remember certain objects...
	if (slev >= PR_EXPERT) {
		o = gettopobject(cell, B_TRUE);
		if (o) {
			cell->knownglyph = *(getglyph(o));
		}
	}
	if (slev >= PR_ADEPT) {
		for (o = cell->obpile->first ; o ; o = o->next) {
			if ((o->type->obclass->id == OC_DFEATURE) || (o->type->obclass->id == OC_TERRAIN)) {
				if (!issecretdoor(o)) {
					cell->knownglyph = *(getglyph(o));
				}
			}
		}
	}
	if (slev >= PR_BEGINNER) {
		o = hasobwithflag(cell->obpile, F_CLIMBABLE);
		if (o) {
			cell->knownglyph = *(getglyph(o));
		}
	}

	if (hasflag(player->flags, F_PHOTOMEM)) {
		cell->knowntime = PERMENANT;
	} else if (slev == PR_INEPT) {
		cell->knowntime = getattr(player, A_IQ);
	} else {
		cell->knowntime = PERMENANT;
	}
	//getcellglyph(&(cell->knownglyph), cell, player);
}

void setcellknownradius(cell_t *centre, int forcelev, int radius, int dirtype) {
	cell_t *cell[MAXCANDIDATES];
	int ncells,i;
	getradiuscells(centre, radius, dirtype, B_FALSE, LOF_DONTNEED, B_TRUE, cell, &ncells, B_FALSE);
	for (i = 0; i < ncells; i++) {
		cell_t *c;
		c = cell[i];
		setcellknown(c, forcelev);
	}
}

void setcelltype(cell_t *cell, enum CELLTYPE id) {
	assert(cell);
	cell->type = findcelltype(id);
	assert(cell->type);
	cell->hp = cell->type->hp;
	if (cell->type->solid) {
		assert(!cell->obpile->first);
	}
	if (gamemode == GM_GAMESTARTED) {
	
		// digging out of a stomach
		if (cell->map &&
			!cell->map->beingcreated && 
			!cell->type->solid && 
			(cell->map->habitat->id == H_STOMACH)) {
			object_t *o,*exit;
			cell_t *exitcell;
			// find an existing exit to copy
			exitcell = findobinmap(cell->map, OT_STOMACHEXIT);
			exit = hasob(exitcell->obpile, OT_STOMACHEXIT);
			assert(exit);
			// add a new exit
			o = addobfast(cell->obpile, OT_STOMACHEXIT);
			copyflag(o->flags, exit->flags, F_MAPLINK);
		}
		if (haslos(player, cell)) {
			needredraw = B_TRUE;
		}
	}
}

// returns true if something happened
int shattercell(cell_t *c, lifeform_t *fromlf, char *damstring) {
	lifeform_t *target;
	char targetname[BUFLEN];
	object_t *o, *nexto;
	int rv = B_FALSE;

	target = c->lf;
	if (target) {
		getlfname(target, targetname);
	}
	// shatter solid glass cells
	if (c->type->solid && willshatter(c->type->material->id)) {
		damagecell(c, 9999, DT_DIRECT);
	}

	// shatter lifeform-owned objects
	if (target) {
		for (o = target->pack->first ; o ; o = nexto) {
			nexto = o->next;
			if (willshatter(o->material->id)) {
				if (shatter(o, B_TRUE, damstring, fromlf)) {
					rv = B_TRUE;
				}
			}
		}
	}

	// shatter cell objects
	for (o = c->obpile->first ; o ; o = nexto) {
		nexto = o->next;
		if (willshatter(o->material->id)) {
			if (shatter(o, B_TRUE, damstring, fromlf)) {
				rv = B_TRUE;
			}
		}
	}
	return rv;
}

int unlinkstairsto(map_t *unlinkmap) {
	map_t *m;
	object_t *o;
	cell_t *c;
	long badid[MAXCANDIDATES];
	int x,y,nbadids = 0,nretflags,i;
	int db = B_TRUE;
        flag_t *retflag[MAXCANDIDATES];

	if (db) dblog("starting unlinkstairsto for unlikmap='%s'",unlinkmap->name);
	// get a list of all stair object ids on this unlinkmap.
	for (y = 0; y < unlinkmap->h; y++) {
		for (x = 0; x < unlinkmap->w; x++) {
			c = getcellat(unlinkmap, x,y);
			for (o = c->obpile->first ; o ; o = o->next) {
				if (hasflag(o->flags, F_MAPLINK)) {
					badid[nbadids++] = o->id;		
				}
			}
		}
	}
	if (db) dblog("   found %d stairs on unlinkmap.",nbadids);
	
	// go through all maps and remove any stairs which link to unlinkmap
	if (db) dblog("   searching other maps for stairs linking to unlinkmap.");
	for (m = firstmap ; m ; m = m->next) {
		for (y = 0; y < m->h; y++) {
			for (x = 0; x < m->w; x++) {
				c = getcellat(m, x,y);
				for (o = c->obpile->first ; o ; o = o->next) {
					getflags(o->flags, retflag, &nretflags, F_MAPLINK, F_NONE);
					for (i = 0; i < nretflags; i++) {
						int killit = B_FALSE,n;
						if (retflag[i]->val[0]  == unlinkmap->id) {
	
							if (db) dblog("   on map '%s': found '%s' linking to unlinkmap's id.", m->name,o->type->name);
							killit = B_TRUE;
						} else {
							for (n = 0; n < nbadids; n++) {
								if (atol(retflag[i]->text) == badid[n]) {
									killit = B_TRUE;
									if (db) dblog("   on map '%s': found '%s' linking to obid of stairs on unlinkmap.", m->name,o->type->name);
									break;
								}
							}
						}
						if (killit) {
							killflag(retflag[i]);
						}
					}
				}
			}
		}
	}

	// now remove all links from stairs on unlinkmap
	if (db) dblog("   removing maplinks from stairs on unlinkmap.");
	for (y = 0; y < unlinkmap->h; y++) {
		for (x = 0; x < unlinkmap->w; x++) {
			c = getcellat(unlinkmap, x,y);
			for (o = c->obpile->first ; o ; o = o->next) {
				killflagsofid(o->flags, F_MAPLINK);
			}
		}
	}
	if (db) dblog("finished unlinkstairsto for unlikmap='%s'",unlinkmap->name);
	return B_FALSE;
}


void updateknowncells(void) {
	//int x,y;
	//map_t *map;
	//object_t *wep;
	//int seenundead = B_FALSE;
	int i;

	// you don't remember cells when you're flying, unless you
	// have a magic map or photographic memory.
	if (isairborne(player) && !lfhasflag(player, F_PHOTOMEM)) {
		return;
	}
	for (i = 0; i < player->nlos; i++) {
		setcellknown(player->los[i], B_FALSE);
	}
}

int validateregions(void) {
	regionoutline_t *ro;
	int failed = B_FALSE;
	// check outlines
	for (ro = firstregionoutline ; ro ; ro = ro->next) {
		int i;
		for (i = 0 ; i < ro->nthings; i++) {
			if (validateregionthing(&ro->thing[i])) {
				failed = B_TRUE;
			}
		}
	}
	return failed;
}

int validateregionthing(regionthing_t *thing) {
	cell_t fakecell;
	map_t fakemap;
	int goterrors = B_FALSE;
	object_t *o;
	createfakes(&fakemap, &fakecell);
	switch (thing->whatkind) {
		case RT_HABITAT:
			if (!findhabitat(thing->value)) {
				dblog("Invalid habitat %d specified in regionthing.", thing->value);
				goterrors = B_TRUE;
			}
			break;
		case RT_OBJECT:
			o = addob(fakecell.obpile, thing->what);
			if (!o) {
				dblog("Invalid object '%s' specified in regionthing.", thing->what);
				goterrors = B_TRUE;
			}
			break;
		case RT_REGIONLINK:
			if (!findregiontype(thing->value)) {
				dblog("Invalid regionlink to regiontype %d specified in regionthing.", thing->value);
				goterrors = B_TRUE;
			}
			break;
		case RT_VAULT:
			if (!findvault(thing->what)) {
				dblog("Invalid rt_vault to vaulttype '%s' specified in regionthing.", thing->what);
				goterrors = B_TRUE;
			}
			break;
		case RT_RNDVAULTWITHFLAG:
			if (!findvaultwithflag(thing->value)) {
				dblog("Invalid rt_rndvaultwithflag specified in regionthing.");
				goterrors = B_TRUE;
			}
			break;
		case RT_RNDVAULTWITHTAG:
			if (!findvaultwithtag(thing->what)) {
				dblog("Invalid rt_rndvaultwithtag specified in regionthing.");
				goterrors = B_TRUE;
			}
			break;
	}
	killfakes(&fakemap, &fakecell);
	return goterrors;
}

int wallstoleftright(cell_t *c, int dir) {
	int d1,d2;
	switch (dir) {
		case D_N: 
		case D_S:
			d1 = D_E; d2 = D_W; break;
		case D_E:
		case D_W:
			d1 = D_N; d2 = D_S; break;
		default:
			return B_FALSE;
	}
	if (iswallindir(c,d1) && iswallindir(c,d2)) {
		return B_TRUE;
	}
	return B_FALSE;
}

void writetextonground(lifeform_t *lf, cell_t *c, char *buf, int howlong) {
	char *p;
	if (lf && isblind(lf)) {
		// if blind, garble text somewhat
		for (p = buf ; *p; p++) {
			if (*p != ' ') {
				if (onein(4)) {
					if (onein(2)) {
						*p = rnd('a','z');
					} else {
						*p = rnd('A','Z');
					}
				}
			}
		}
	}

	if (c->writing) {
		free(c->writing);
	}
	c->writing = strdup(buf);
	c->writinglifetime  = howlong;

	if (haslos(player, c)) {
		if (c == player->cell) {
			msg("Magical writing appears around you!");
		} else {
			msg("Magical writing appears nearby!");
		}
	} else if (c == player->cell) {
		msg("You feel something stirring in the air around you.");
	}
}