Source:NetHack 3.4.3/src/extralev.c

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/*	SCCS Id: @(#)extralev.c	3.4	2001/09/06	*/
/*	Copyright 1988, 1989 by Ken Arromdee				*/
/* NetHack may be freely redistributed.  See license for details. */

The NetHack General Public License applies to screenshots, source code and other content from NetHack.

This content was modified from the original NetHack source code distribution (by splitting up NetHack content between wiki pages, and possibly further editing). See the page history for a list of who changed it, and on what dates.

/*
* Support code for "rogue"-style level.
*/

#include "hack.h"

#ifdef REINCARNATION

struct rogueroom {
	xchar rlx, rly;
	xchar dx, dy;
	boolean real;
	uchar doortable;
	int nroom; /* Only meaningful for "real" rooms */
};
#define UP 1
#define DOWN 2
#define LEFT 4
#define RIGHT 8

static NEARDATA struct rogueroom r[3][3];
STATIC_DCL void FDECL(roguejoin,(int,int,int,int,int));
STATIC_DCL void FDECL(roguecorr,(int,int,int));
STATIC_DCL void FDECL(miniwalk,(int,int));

roguejoin

STATIC_OVL
void
roguejoin(x1,y1,x2,y2, horiz)
int x1,y1,x2,y2;
int horiz;
{
	register int x,y,middle;
#ifndef MAX
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#endif
#ifndef MIN
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
#endif
	if (horiz) {
		middle = x1 + rn2(x2-x1+1);
		for(x=MIN(x1,middle); x<=MAX(x1,middle); x++)
			corr(x, y1);
		for(y=MIN(y1,y2); y<=MAX(y1,y2); y++)
			corr(middle,y);
		for(x=MIN(middle,x2); x<=MAX(middle,x2); x++)
			corr(x, y2);
	} else {
		middle = y1 + rn2(y2-y1+1);
		for(y=MIN(y1,middle); y<=MAX(y1,middle); y++)
			corr(x1, y);
		for(x=MIN(x1,x2); x<=MAX(x1,x2); x++)
			corr(x, middle);
		for(y=MIN(middle,y2); y<=MAX(middle,y2); y++)
			corr(x2,y);
	}
}

roguecorr

STATIC_OVL
void
roguecorr(x, y, dir)
int x,y,dir;
{
	register int fromx, fromy, tox, toy;

	if (dir==DOWN) {
		r[x][y].doortable &= ~DOWN;
		if (!r[x][y].real) {
			fromx = r[x][y].rlx; fromy = r[x][y].rly;
			fromx += 1 + 26*x; fromy += 7*y;
		} else {
			fromx = r[x][y].rlx + rn2(r[x][y].dx);
			fromy = r[x][y].rly + r[x][y].dy;
			fromx += 1 + 26*x; fromy += 7*y;
			if (!IS_WALL(levl[fromx][fromy].typ))
				impossible("down: no wall at %d,%d?",fromx,
									fromy);
			dodoor(fromx, fromy, &rooms[r[x][y].nroom]);
			levl[fromx][fromy].doormask = D_NODOOR;
			fromy++;
		}
		if(y >= 2) {
			impossible("down door from %d,%d going nowhere?",x,y);
			return;
		}
		y++;
		r[x][y].doortable &= ~UP;
		if (!r[x][y].real) {
			tox = r[x][y].rlx; toy = r[x][y].rly;
			tox += 1 + 26*x; toy += 7*y;
		} else {
			tox = r[x][y].rlx + rn2(r[x][y].dx);
			toy = r[x][y].rly - 1;
			tox += 1 + 26*x; toy += 7*y;
			if (!IS_WALL(levl[tox][toy].typ))
				impossible("up: no wall at %d,%d?",tox,toy);
			dodoor(tox, toy, &rooms[r[x][y].nroom]);
			levl[tox][toy].doormask = D_NODOOR;
			toy--;
		}
		roguejoin(fromx, fromy, tox, toy, FALSE);
		return;
	} else if (dir == RIGHT) {
		r[x][y].doortable &= ~RIGHT;
		if (!r[x][y].real) {
			fromx = r[x][y].rlx; fromy = r[x][y].rly;
			fromx += 1 + 26*x; fromy += 7*y;
		} else {
			fromx = r[x][y].rlx + r[x][y].dx;
			fromy = r[x][y].rly + rn2(r[x][y].dy);
			fromx += 1 + 26*x; fromy += 7*y;
			if (!IS_WALL(levl[fromx][fromy].typ))
				impossible("down: no wall at %d,%d?",fromx,
									fromy);
			dodoor(fromx, fromy, &rooms[r[x][y].nroom]);
			levl[fromx][fromy].doormask = D_NODOOR;
			fromx++;
		}
		if(x >= 2) {
			impossible("right door from %d,%d going nowhere?",x,y);
			return;
		}
		x++;
		r[x][y].doortable &= ~LEFT;
		if (!r[x][y].real) {
			tox = r[x][y].rlx; toy = r[x][y].rly;
			tox += 1 + 26*x; toy += 7*y;
		} else {
			tox = r[x][y].rlx - 1;
			toy = r[x][y].rly + rn2(r[x][y].dy);
			tox += 1 + 26*x; toy += 7*y;
			if (!IS_WALL(levl[tox][toy].typ))
				impossible("left: no wall at %d,%d?",tox,toy);
			dodoor(tox, toy, &rooms[r[x][y].nroom]);
			levl[tox][toy].doormask = D_NODOOR;
			tox--;
		}
		roguejoin(fromx, fromy, tox, toy, TRUE);
		return;
	} else impossible("corridor in direction %d?",dir);
}

miniwalk

/* Modified walkfrom() from mkmaze.c */
STATIC_OVL
void
miniwalk(x, y)
int x,y;
{
	register int q, dir;
	int dirs[4];

	while(1) {
		q = 0;
#define doorhere (r[x][y].doortable)
		if (x>0 && (!(doorhere & LEFT)) &&
					(!r[x-1][y].doortable || !rn2(10)))
			dirs[q++] = 0;
		if (x<2 && (!(doorhere & RIGHT)) &&
					(!r[x+1][y].doortable || !rn2(10)))
			dirs[q++] = 1;
		if (y>0 && (!(doorhere & UP)) &&
					(!r[x][y-1].doortable || !rn2(10)))
			dirs[q++] = 2;
		if (y<2 && (!(doorhere & DOWN)) &&
					(!r[x][y+1].doortable || !rn2(10)))
			dirs[q++] = 3;
	/* Rogue levels aren't just 3 by 3 mazes; they have some extra
	 * connections, thus that 1/10 chance
	 */
		if (!q) return;
		dir = dirs[rn2(q)];
		switch(dir) { /* Move in direction */
			case 0: doorhere |= LEFT;
				x--;
				doorhere |= RIGHT;
				break;
			case 1: doorhere |= RIGHT;
				x++;
				doorhere |= LEFT;
				break;
			case 2: doorhere |= UP;
				y--;
				doorhere |= DOWN;
				break;
			case 3: doorhere |= DOWN;
				y++;
				doorhere |= UP;
				break;
		}
		miniwalk(x,y);
	}
}

makeroguerooms

void
makeroguerooms() {
	register int x,y;
	/* Rogue levels are structured 3 by 3, with each section containing
	 * a room or an intersection.  The minimum width is 2 each way.
	 * One difference between these and "real" Rogue levels: real Rogue
	 * uses 24 rows and NetHack only 23.  So we cheat a bit by making the
	 * second row of rooms not as deep.
	 *
	 * Each normal space has 6/7 rows and 25 columns in which a room may
	 * actually be placed.  Walls go from rows 0-5/6 and columns 0-24.
	 * Not counting walls, the room may go in
	 * rows 1-5 and columns 1-23 (numbering starting at 0).  A room
	 * coordinate of this type may be converted to a level coordinate
	 * by adding 1+28*x to the column, and 7*y to the row.  (The 1
	 * is because column 0 isn't used [we only use 1-78]).
	 * Room height may be 2-4 (2-5 on last row), length 2-23 (not
	 * counting walls)
	 */
#define here r[x][y]

	nroom = 0;
	for(y=0; y<3; y++) for(x=0; x<3; x++) {
		/* Note: we want to insure at least 1 room.  So, if the
		 * first 8 are all dummies, force the last to be a room.
		 */
		if (!rn2(5) && (nroom || (x<2 && y<2))) {
			/* Arbitrary: dummy rooms may only go where real
			 * ones do.
			 */
			here.real = FALSE;
			here.rlx = rn1(22, 2);
			here.rly = rn1((y==2)?4:3, 2);
		} else {
			here.real = TRUE;
			here.dx = rn1(22, 2); /* 2-23 long, plus walls */
			here.dy = rn1((y==2)?4:3, 2); /* 2-5 high, plus walls */

			/* boundaries of room floor */
			here.rlx = rnd(23 - here.dx + 1);
			here.rly = rnd(((y==2) ? 5 : 4)- here.dy + 1);
			nroom++;
		}
		here.doortable = 0;
	}
	miniwalk(rn2(3), rn2(3));
	nroom = 0;
	for(y=0; y<3; y++) for(x=0; x<3; x++) {
		if (here.real) { /* Make a room */
			int lowx, lowy, hix, hiy;

			r[x][y].nroom = nroom;
			smeq[nroom] = nroom;

			lowx = 1 + 26*x + here.rlx;
			lowy = 7*y + here.rly;
			hix = 1 + 26*x + here.rlx + here.dx - 1;
			hiy = 7*y + here.rly + here.dy - 1;
			/* Strictly speaking, it should be lit only if above
			 * level 10, but since Rogue rooms are only
			 * encountered below level 10, use !rn2(7).
			 */
			add_room(lowx, lowy, hix, hiy,
				 (boolean) !rn2(7), OROOM, FALSE);
		}
	}

	/* Now, add connecting corridors. */
	for(y=0; y<3; y++) for(x=0; x<3; x++) {
		if (here.doortable & DOWN)
			roguecorr(x, y, DOWN);
		if (here.doortable & RIGHT)
			roguecorr(x, y, RIGHT);
		if (here.doortable & LEFT)
			impossible ("left end of %d, %d never connected?",x,y);
		if (here.doortable & UP)
			impossible ("up end of %d, %d never connected?",x,y);
	}
}

corr

void
corr(x,y)
int x, y;
{
	if (rn2(50)) {
		levl[x][y].typ = CORR;
	} else {
		levl[x][y].typ = SCORR;
	}
}

makerogueghost

void
makerogueghost()
{
	register struct monst *ghost;
	struct obj *ghostobj;
	struct mkroom *croom;
	int x,y;

	if (!nroom) return; /* Should never happen */
	croom = &rooms[rn2(nroom)];
	x = somex(croom); y = somey(croom);
	if (!(ghost = makemon(&mons[PM_GHOST], x, y, NO_MM_FLAGS)))
		return;
	ghost->msleeping = 1;
	ghost = christen_monst(ghost, roguename());

	if (rn2(4)) {
		ghostobj = mksobj_at(FOOD_RATION, x, y, FALSE, FALSE);
		ghostobj->quan = (long) rnd(7);
		ghostobj->owt = weight(ghostobj);
	}
	if (rn2(2)) {
		ghostobj = mksobj_at(MACE, x, y, FALSE, FALSE);
		ghostobj->spe = rnd(3);
		if (rn2(4)) curse(ghostobj);
	} else {
		ghostobj = mksobj_at(TWO_HANDED_SWORD, x, y, FALSE, FALSE);
		ghostobj->spe = rnd(5) - 2;
		if (rn2(4)) curse(ghostobj);
	}
	ghostobj = mksobj_at(BOW, x, y, FALSE, FALSE);
	ghostobj->spe = 1;
	if (rn2(4)) curse(ghostobj);

	ghostobj = mksobj_at(ARROW, x, y, FALSE, FALSE);
	ghostobj->spe = 0;
	ghostobj->quan = (long) rn1(10,25);
	ghostobj->owt = weight(ghostobj);
	if (rn2(4)) curse(ghostobj);

	if (rn2(2)) {
		ghostobj = mksobj_at(RING_MAIL, x, y, FALSE, FALSE);
		ghostobj->spe = rn2(3);
		if (!rn2(3)) ghostobj->oerodeproof = TRUE;
		if (rn2(4)) curse(ghostobj);
	} else {
		ghostobj = mksobj_at(PLATE_MAIL, x, y, FALSE, FALSE);
		ghostobj->spe = rnd(5) - 2;
		if (!rn2(3)) ghostobj->oerodeproof = TRUE;
		if (rn2(4)) curse(ghostobj);
	}
	if (rn2(2)) {
		ghostobj = mksobj_at(FAKE_AMULET_OF_YENDOR, x, y, TRUE, FALSE);
		ghostobj->known = TRUE;
	}
}
#endif /* REINCARNATION */

/*extralev.c*/