Add Doxygen comment to rooms.c.

[hengband/hengband.git] / src / rooms.c

/*!
 * @file rooms.c
 * @brief ¥À¥ó¥¸¥ç¥ó¥Õ¥í¥¢¤ÎÉô²°À¸À®½èÍý / make rooms. Used by generate.c when creating dungeons.
 * @date 2014/01/06
 * @author
 * Copyright (c) 1997 Ben Harrison, James E. Wilson, Robert A. Koeneke\n
 * This software may be copied and distributed for educational, research,\n
 * and not for profit purposes provided that this copyright and statement\n
 * are included in all such copies.  Other copyrights may also apply.\n
 * 2014 Deskull rearranged comment for Doxygen. \n
 * @details
 * Room building routines.\n
 *\n
 * Room types:\n
 *   1 -- normal\n
 *   2 -- overlapping\n
 *   3 -- cross shaped\n
 *   4 -- large room with features\n
 *   5 -- monster nests\n
 *   6 -- monster pits\n
 *   7 -- simple vaults\n
 *   8 -- greater vaults\n
 *   9 -- fractal caves\n
 *  10 -- random vaults\n
 *  11 -- circular rooms\n
 *  12 -- crypts\n
 *  13 -- trapped monster pits\n
 *  14 -- trapped room\n
 *  15 -- glass room\n
 *  16 -- underground arcade\n
 *\n
 * Some functions are used to determine if the given monster\n
 * is appropriate for inclusion in a monster nest or monster pit or\n
 * the given type.\n
 *\n
 * None of the pits/nests are allowed to include "unique" monsters.\n
 */

#include "angband.h"
#include "generate.h"
#include "grid.h"
#include "rooms.h"


/*!
 * ³ÆÉô²°¥¿¥¤¥×¤ÎÀ¸À®ÈæÄêµÁ
 *[from SAngband (originally from OAngband)]\n
 *\n
 * Table of values that control how many times each type of room will\n
 * appear.  Each type of room has its own row, and each column\n
 * corresponds to dungeon levels 0, 10, 20, and so on.  The final\n
 * value is the minimum depth the room can appear at.  -LM-\n
 *\n
 * Level 101 and below use the values for level 100.\n
 *\n
 * Rooms with lots of monsters or loot may not be generated if the\n
 * object or monster lists are already nearly full.  Rooms will not\n
 * appear above their minimum depth.  Tiny levels will not have space\n
 * for all the rooms you ask for.\n
 */
static room_info_type room_info_normal[ROOM_T_MAX] =
{
        /* Depth */
        /*  0  10  20  30  40  50  60  70  80  90 100  min limit */

        {{999,900,800,700,600,500,400,300,200,100,  0},  0}, /*NORMAL   */
        {{  1, 10, 20, 30, 40, 50, 60, 70, 80, 90,100},  1}, /*OVERLAP  */
        {{  1, 10, 20, 30, 40, 50, 60, 70, 80, 90,100},  3}, /*CROSS    */
        {{  1, 10, 20, 30, 40, 50, 60, 70, 80, 90,100},  3}, /*INNER_F  */
        {{  0,  1,  1,  1,  2,  3,  5,  6,  8, 10, 13}, 10}, /*NEST     */
        {{  0,  1,  1,  2,  3,  4,  6,  8, 10, 13, 16}, 10}, /*PIT      */
        {{  0,  1,  1,  1,  2,  2,  3,  5,  6,  8, 10}, 10}, /*LESSER_V */
        {{  0,  0,  1,  1,  1,  2,  2,  2,  3,  3,  4}, 20}, /*GREATER_V*/
        {{  0,100,200,300,400,500,600,700,800,900,999}, 10}, /*FRACAVE  */
        {{  0,  1,  1,  1,  1,  1,  1,  1,  1,  2,  2}, 10}, /*RANDOM_V */
        {{  0,  4,  8, 12, 16, 20, 24, 28, 32, 36, 40},  3}, /*OVAL     */
        {{  1,  6, 12, 18, 24, 30, 36, 42, 48, 54, 60}, 10}, /*CRYPT    */
        {{  0,  0,  1,  1,  1,  2,  3,  4,  5,  6,  8}, 20}, /*TRAP_PIT */
        {{  0,  0,  1,  1,  1,  2,  3,  4,  5,  6,  8}, 20}, /*TRAP     */
        {{  0,  0,  0,  0,  1,  1,  1,  2,  2,  2,  2}, 40}, /*GLASS    */
        {{  1,  1,  1,  1,  1,  1,  1,  2,  2,  3,  3},  1}, /*ARCADE   */
};


/*! Éô²°¤ÎÀ¸À®½èÍý½ç / Build rooms in descending order of difficulty. */
static byte room_build_order[ROOM_T_MAX] = {
        ROOM_T_GREATER_VAULT,
        ROOM_T_ARCADE,
        ROOM_T_RANDOM_VAULT,
        ROOM_T_LESSER_VAULT,
        ROOM_T_TRAP_PIT,
        ROOM_T_PIT,
        ROOM_T_NEST,
        ROOM_T_TRAP,
        ROOM_T_GLASS,
        ROOM_T_INNER_FEAT,
        ROOM_T_OVAL,
        ROOM_T_CRYPT,
        ROOM_T_OVERLAP,
        ROOM_T_CROSS,
        ROOM_T_FRACAVE,
        ROOM_T_NORMAL,
};

/*!
 * @brief ¸°¤Î¤«¤«¤Ã¤¿¥É¥¢¤òÇÛÃÖ¤¹¤ë
 * @param y ÇÛÃÖ¤·¤¿¤¤¥Õ¥í¥¢¤ÎYºÂɸ
 * @param x ÇÛÃÖ¤·¤¿¤¤¥Õ¥í¥¢¤ÎXºÂɸ
 * @return ¤Ê¤·
 */
static void place_locked_door(int y, int x)
{
        if (d_info[dungeon_type].flags1 & DF1_NO_DOORS)
        {
                place_floor_bold(y, x);
        }
        else
        {
                set_cave_feat(y, x, feat_locked_door_random((d_info[dungeon_type].flags1 & DF1_GLASS_DOOR) ? DOOR_GLASS_DOOR : DOOR_DOOR));
                cave[y][x].info &= ~(CAVE_FLOOR);
                delete_monster(y, x);
        }
}

/*!
 * @brief ±£¤·¥É¥¢¤òÇÛÃÖ¤¹¤ë
 * @param y ÇÛÃÖ¤·¤¿¤¤¥Õ¥í¥¢¤ÎYºÂɸ
 * @param x ÇÛÃÖ¤·¤¿¤¤¥Õ¥í¥¢¤ÎXºÂɸ
 * @param type #DOOR_DEFAULT / #DOOR_DOOR / #DOOR_GLASS_DOOR / #DOOR_CURTAIN ¤Î¤¤¤º¤ì¤«
 * @return ¤Ê¤·
 */
static void place_secret_door(int y, int x, int type)
{
        if (d_info[dungeon_type].flags1 & DF1_NO_DOORS)
        {
                place_floor_bold(y, x);
        }
        else
        {
                cave_type *c_ptr = &cave[y][x];

                if (type == DOOR_DEFAULT)
                {
                        type = ((d_info[dungeon_type].flags1 & DF1_CURTAIN) &&
                                one_in_((d_info[dungeon_type].flags1 & DF1_NO_CAVE) ? 16 : 256)) ? DOOR_CURTAIN :
                                ((d_info[dungeon_type].flags1 & DF1_GLASS_DOOR) ? DOOR_GLASS_DOOR : DOOR_DOOR);
                }

                /* Create secret door */
                place_closed_door(y, x, type);

                if (type != DOOR_CURTAIN)
                {
                        /* Hide by inner wall because this is used in rooms only */
                        c_ptr->mimic = feat_wall_inner;

                        /* Floor type terrain cannot hide a door */
                        if (feat_supports_los(c_ptr->mimic) && !feat_supports_los(c_ptr->feat))
                        {
                                if (have_flag(f_info[c_ptr->mimic].flags, FF_MOVE) || have_flag(f_info[c_ptr->mimic].flags, FF_CAN_FLY))
                                {
                                        c_ptr->feat = one_in_(2) ? c_ptr->mimic : floor_type[randint0(100)];
                                }
                                c_ptr->mimic = 0;
                        }
                }

                c_ptr->info &= ~(CAVE_FLOOR);
                delete_monster(y, x);
        }
}

/*!
 * @brief 1¥Þ¥¹¤À¤±¤ÎÉô²°¤òºîÀ®¤·¡¢¾å²¼º¸±¦¤¤¤º¤ì¤«°ì¤Ä¤Ë±£¤·¥É¥¢¤òÇÛÃÖ¤¹¤ë¡£
 * @param y0 ÇÛÃÖ¤·¤¿¤¤Ãæ¿´¤ÎYºÂɸ
 * @param x0 ÇÛÃÖ¤·¤¿¤¤Ãæ¿´¤ÎXºÂɸ
 * @details
 * This funtion makes a very small room centred at (x0, y0)
 * This is used in crypts, and random elemental vaults.
 *
 * Note - this should be used only on allocated regions
 * within another room.
 */
static void build_small_room(int x0, int y0)
{
        int x, y;

        for (y = y0 - 1; y <= y0 + 1; y++)
        {
                place_inner_bold(y, x0 - 1);
                place_inner_bold(y, x0 + 1);
        }

        for (x = x0 - 1; x <= x0 + 1; x++)
        {
                place_inner_bold(y0 - 1, x);
                place_inner_bold(y0 + 1, x);
        }

        /* Place a secret door on one side */
        switch (randint0(4))
        {
                case 0: place_secret_door(y0, x0 - 1, DOOR_DEFAULT); break;
                case 1: place_secret_door(y0, x0 + 1, DOOR_DEFAULT); break;
                case 2: place_secret_door(y0 - 1, x0, DOOR_DEFAULT); break;
                case 3: place_secret_door(y0 + 1, x0, DOOR_DEFAULT); break;
        }

        /* Clear mimic type */
        cave[y0][x0].mimic = 0;

        /* Add inner open space */
        place_floor_bold(y0, x0);
}

/*!
 * @brief
 * »ØÄêÈϰϤËÄÌÏ©¤¬Ä̤äƤ¤¤ë¤³¤È¤ò³Îǧ¤·¤¿¾å¤Ç¾²¤ÇËä¤á¤ë
 * This function tunnels around a room if it will cut off part of a cave system.
 * @param x1 ÈϰϤκ¸Ã¼
 * @param y1 ÈϰϤξåü
 * @param x2 ÈϰϤα¦Ã¼
 * @param y2 ÈϰϤβ¼Ã¼
 * @return ¤Ê¤·
 */
static void check_room_boundary(int x1, int y1, int x2, int y2)
{
        int count, x, y;
        bool old_is_floor, new_is_floor;


        /* Initialize */
        count = 0;

        old_is_floor = get_is_floor(x1 - 1, y1);

        /*
         * Count the number of floor-wall boundaries around the room
         * Note: diagonal squares are ignored since the player can move diagonally
         * to bypass these if needed.
         */

        /* Above the top boundary */
        for (x = x1; x <= x2; x++)
        {
                new_is_floor = get_is_floor(x, y1 - 1);

                /* Increment counter if they are different */
                if (new_is_floor != old_is_floor) count++;

                old_is_floor = new_is_floor;
        }

        /* Right boundary */
        for (y = y1; y <= y2; y++)
        {
                new_is_floor = get_is_floor(x2 + 1, y);

                /* increment counter if they are different */
                if (new_is_floor != old_is_floor) count++;

                old_is_floor = new_is_floor;
        }

        /* Bottom boundary */
        for (x = x2; x >= x1; x--)
        {
                new_is_floor = get_is_floor(x, y2 + 1);

                /* increment counter if they are different */
                if (new_is_floor != old_is_floor) count++;

                old_is_floor = new_is_floor;
        }

        /* Left boundary */
        for (y = y2; y >= y1; y--)
        {
                new_is_floor = get_is_floor(x1 - 1, y);

                /* increment counter if they are different */
                if (new_is_floor != old_is_floor) count++;

                old_is_floor = new_is_floor;
        }

        /* If all the same, or only one connection exit. */
        if (count <= 2) return;


        /* Tunnel around the room so to prevent problems with caves */
        for (y = y1; y <= y2; y++)
        {
                for (x = x1; x <= x2; x++)
                {
                        set_floor(x, y);
                }
        }
}


/*!
 * @brief
 * find_space()¤ÎͽÈ÷½èÍý¤È¤·¤ÆÉô²°¤ÎÀ¸À®¤¬²Äǽ¤«¤òȽÄꤹ¤ë /
 * Helper function for find_space(). Is this a good location?
 * @param block_high ÈϰϤι⤵
 * @param block_wide ÈϰϤÎÉý
 * @param block_y ÈϰϤξåü
 * @param block_x ÈϰϤκ¸Ã¼
 * @return ¤Ê¤·
 */
static bool find_space_aux(int blocks_high, int blocks_wide, int block_y, int block_x)
{
        int by1, bx1, by2, bx2, by, bx;

        /* Itty-bitty rooms must shift about within their rectangle */
        if (blocks_wide < 3)
        {
                if ((blocks_wide == 2) && (block_x % 3) == 2)
                        return FALSE;
        }

        /* Rooms with width divisible by 3 must be fitted to a rectangle. */
        else if ((blocks_wide % 3) == 0)
        {
                /* Must be aligned to the left edge of a 11x33 rectangle. */
                if ((block_x % 3) != 0)
                        return FALSE;
        }

        /*
         * Big rooms that do not have a width divisible by 3 must be
         * aligned towards the edge of the dungeon closest to them.
         */
        else
        {
                /* Shift towards left edge of dungeon. */
                if (block_x + (blocks_wide / 2) <= dun->col_rooms / 2)
                {
                        if (((block_x % 3) == 2) && ((blocks_wide % 3) == 2))
                                return FALSE;
                        if ((block_x % 3) == 1)
                                return FALSE;
                }

                /* Shift toward right edge of dungeon. */
                else
                {
                        if (((block_x % 3) == 2) && ((blocks_wide % 3) == 2))
                                return FALSE;
                        if ((block_x % 3) == 1)
                                return FALSE;
                }
        }

        /* Extract blocks */
        by1 = block_y + 0;
        bx1 = block_x + 0;
        by2 = block_y + blocks_high;
        bx2 = block_x + blocks_wide;

        /* Never run off the screen */
        if ((by1 < 0) || (by2 > dun->row_rooms)) return FALSE;
        if ((bx1 < 0) || (bx2 > dun->col_rooms)) return FALSE;
        
        /* Verify available space */
        for (by = by1; by < by2; by++)
        {
                for (bx = bx1; bx < bx2; bx++)
                {
                        if (dun->room_map[by][bx])
                        {
                                return FALSE;
                        }
                }
        }

        /* This location is okay */
        return TRUE;
}


/*!
 * @brief Éô²°À¸À®¤¬²Äǽ¤Ê¥¹¥Ú¡¼¥¹¤ò³ÎÊݤ¹¤ë / Find a good spot for the next room.  -LM-
 * @param y Éô²°¤ÎÀ¸À®¤¬²Äǽ¤ÊÃæ¿´YºÂɸ¤òÊÖ¤¹»²¾È¥Ý¥¤¥ó¥¿
 * @param x Éô²°¤ÎÀ¸À®¤¬²Äǽ¤ÊÃæ¿´XºÂɸ¤òÊÖ¤¹»²¾È¥Ý¥¤¥ó¥¿
 * @param height ³ÎÊݤ·¤¿¤¤Îΰè¤Î¹â¤µ
 * @param width ³ÎÊݤ·¤¿¤¤Îΰè¤ÎÉý
 * @return ½êÄê¤ÎÈϰϤ¬³ÎÊݤǤ­¤¿¾ì¹çTRUE¤òÊÖ¤¹
 * @details
 * Find and allocate a free space in the dungeon large enough to hold\n
 * the room calling this function.\n
 *\n
 * We allocate space in 11x11 blocks, but want to make sure that rooms\n
 * align neatly on the standard screen.  Therefore, we make them use\n
 * blocks in few 11x33 rectangles as possible.\n
 *\n
 * Be careful to include the edges of the room in height and width!\n
 *\n
 * Return TRUE and values for the center of the room if all went well.\n
 * Otherwise, return FALSE.\n
 */
static bool find_space(int *y, int *x, int height, int width)
{
        int candidates, pick;
        int by, bx, by1, bx1, by2, bx2;
        int block_y = 0, block_x = 0;


        /* Find out how many blocks we need. */
        int blocks_high = 1 + ((height - 1) / BLOCK_HGT);
        int blocks_wide = 1 + ((width - 1) / BLOCK_WID);

        /* There are no way to allocate such huge space */
        if (dun->row_rooms < blocks_high) return FALSE;
        if (dun->col_rooms < blocks_wide) return FALSE;

        /* Initiallize */
        candidates = 0;

        /* Count the number of valid places */
        for (block_y = dun->row_rooms - blocks_high; block_y >= 0; block_y--)
        {
                for (block_x = dun->col_rooms - blocks_wide; block_x >= 0; block_x--)
                {
                        if (find_space_aux(blocks_high, blocks_wide, block_y, block_x))
                        {
                                /* Find a valid place */
                                candidates++;
                        }
                }
        }

        /* No place! */
        if (!candidates)
        {
                return FALSE;
        }

        /* Normal dungeon */
        if (!(d_info[dungeon_type].flags1 & DF1_NO_CAVE))
        {
                /* Choose a random one */
                pick = randint1(candidates);
        }

        /* NO_CAVE dungeon (Castle) */
        else
        {
                /* Always choose the center one */
                pick = candidates/2 + 1;
        }

        /* Pick up the choosen location */
        for (block_y = dun->row_rooms - blocks_high; block_y >= 0; block_y--)
        {
                for (block_x = dun->col_rooms - blocks_wide; block_x >= 0; block_x--)
                {
                        if (find_space_aux(blocks_high, blocks_wide, block_y, block_x))
                        {
                                pick--;

                                /* This one is picked? */
                                if (!pick) break;
                        }
                }

                if (!pick) break;
        }

        /* Extract blocks */
        by1 = block_y + 0;
        bx1 = block_x + 0;
        by2 = block_y + blocks_high;
        bx2 = block_x + blocks_wide;

        /*
         * It is *extremely* important that the following calculation
         * be *exactly* correct to prevent memory errors
         */

        /* Acquire the location of the room */
        (*y) = ((by1 + by2) * BLOCK_HGT) / 2;
        (*x) = ((bx1 + bx2) * BLOCK_WID) / 2;

        /* Save the room location */
        if (dun->cent_n < CENT_MAX)
        {
                dun->cent[dun->cent_n].y = *y;
                dun->cent[dun->cent_n].x = *x;
                dun->cent_n++;
        }

        /* Reserve some blocks. */
        for (by = by1; by < by2; by++)
        {
                for (bx = bx1; bx < bx2; bx++)
                {
                        dun->room_map[by][bx] = TRUE;
                }
        }


        /*
         * Hack- See if room will cut off a cavern.
         *
         * If so, fix by tunneling outside the room in such a
         * way as to connect the caves.
         */
        check_room_boundary(*x - width / 2 - 1, *y - height / 2 - 1, *x + (width - 1) / 2 + 1, *y + (height - 1) / 2 + 1);


        /* Success. */
        return TRUE;
}



/*!
 * @brief ¥¿¥¤¥×1¤ÎÉô²°¡ÄÄ̾ï²ÄÊÑĹÊý·Á¤ÎÉô²°¤òÀ¸À®¤¹¤ë / Type 1 -- normal rectangular rooms
 * @return ¤Ê¤·
 */
static bool build_type1(void)
{
        int y, x, y2, x2, yval, xval;
        int y1, x1, xsize, ysize;

        bool light;

        cave_type *c_ptr;

        bool curtain = (d_info[dungeon_type].flags1 & DF1_CURTAIN) &&
                one_in_((d_info[dungeon_type].flags1 & DF1_NO_CAVE) ? 48 : 512);

        /* Pick a room size */
        y1 = randint1(4);
        x1 = randint1(11);
        y2 = randint1(3);
        x2 = randint1(11);

        xsize = x1 + x2 + 1;
        ysize = y1 + y2 + 1;

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, ysize + 2, xsize + 2))
        {
                /* Limit to the minimum room size, and retry */
                y1 = 1;
                x1 = 1;
                y2 = 1;
                x2 = 1;

                xsize = x1 + x2 + 1;
                ysize = y1 + y2 + 1;

                /* Find and reserve some space in the dungeon.  Get center of room. */
                if (!find_space(&yval, &xval, ysize + 2, xsize + 2)) return FALSE;
        }

        /* Choose lite or dark */
        light = ((dun_level <= randint1(25)) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS));


        /* Get corner values */
        y1 = yval - ysize / 2;
        x1 = xval - xsize / 2;
        y2 = yval + (ysize - 1) / 2;
        x2 = xval + (xsize - 1) / 2;


        /* Place a full floor under the room */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }

        /* Walls around the room */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2 + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2 + 1][x];
                place_outer_grid(c_ptr);
        }


        /* Hack -- Occasional curtained room */
        if (curtain && (y2 - y1 > 2) && (x2 - x1 > 2))
        {
                for (y = y1; y <= y2; y++)
                {
                        c_ptr = &cave[y][x1];
                        c_ptr->feat = feat_door[DOOR_CURTAIN].closed;
                        c_ptr->info &= ~(CAVE_MASK);
                        c_ptr = &cave[y][x2];
                        c_ptr->feat = feat_door[DOOR_CURTAIN].closed;
                        c_ptr->info &= ~(CAVE_MASK);
                }
                for (x = x1; x <= x2; x++)
                {
                        c_ptr = &cave[y1][x];
                        c_ptr->feat = feat_door[DOOR_CURTAIN].closed;
                        c_ptr->info &= ~(CAVE_MASK);
                        c_ptr = &cave[y2][x];
                        c_ptr->feat = feat_door[DOOR_CURTAIN].closed;
                        c_ptr->info &= ~(CAVE_MASK);
                }
        }


        /* Hack -- Occasional pillar room */
        if (one_in_(20))
        {
                for (y = y1; y <= y2; y += 2)
                {
                        for (x = x1; x <= x2; x += 2)
                        {
                                c_ptr = &cave[y][x];
                                place_inner_grid(c_ptr);
                        }
                }
        }

        /* Hack -- Occasional room with four pillars */
        else if (one_in_(20))
        {
                if ((y1 + 4 < y2) && (x1 + 4 < x2))
                {
                        c_ptr = &cave[y1 + 1][x1 + 1];
                        place_inner_grid(c_ptr);

                        c_ptr = &cave[y1 + 1][x2 - 1];
                        place_inner_grid(c_ptr);

                        c_ptr = &cave[y2 - 1][x1 + 1];
                        place_inner_grid(c_ptr);

                        c_ptr = &cave[y2 - 1][x2 - 1];
                        place_inner_grid(c_ptr);
                }
        }

        /* Hack -- Occasional ragged-edge room */
        else if (one_in_(50))
        {
                for (y = y1 + 2; y <= y2 - 2; y += 2)
                {
                        c_ptr = &cave[y][x1];
                        place_inner_grid(c_ptr);
                        c_ptr = &cave[y][x2];
                        place_inner_grid(c_ptr);
                }
                for (x = x1 + 2; x <= x2 - 2; x += 2)
                {
                        c_ptr = &cave[y1][x];
                        place_inner_grid(c_ptr);
                        c_ptr = &cave[y2][x];
                        place_inner_grid(c_ptr);
                }
        }
        /* Hack -- Occasional divided room */
        else if (one_in_(50))
        {
                bool curtain2 = (d_info[dungeon_type].flags1 & DF1_CURTAIN) &&
                        one_in_((d_info[dungeon_type].flags1 & DF1_NO_CAVE) ? 2 : 128);

                if (randint1(100) < 50)
                {
                        /* Horizontal wall */
                        for (x = x1; x <= x2; x++)
                        {
                                place_inner_bold(yval, x);
                                if (curtain2) cave[yval][x].feat = feat_door[DOOR_CURTAIN].closed;
                        }

                        /* Prevent edge of wall from being tunneled */
                        place_solid_bold(yval, x1 - 1);
                        place_solid_bold(yval, x2 + 1);
                }
                else
                {
                        /* Vertical wall */
                        for (y = y1; y <= y2; y++)
                        {
                                place_inner_bold(y, xval);
                                if (curtain2) cave[y][xval].feat = feat_door[DOOR_CURTAIN].closed;
                        }

                        /* Prevent edge of wall from being tunneled */
                        place_solid_bold(y1 - 1, xval);
                        place_solid_bold(y2 + 1, xval);
                }

                place_random_door(yval, xval, TRUE);
                if (curtain2) cave[yval][xval].feat = feat_door[DOOR_CURTAIN].closed;
        }

        return TRUE;
}

/*!
 * @brief ¥¿¥¤¥×2¤ÎÉô²°¡ÄÆó½ÅĹÊý·Á¤ÎÉô²°¤òÀ¸À®¤¹¤ë / Type 2 -- Overlapping rectangular rooms
 * @return ¤Ê¤·
 */
static bool build_type2(void)
{
        int                     y, x, xval, yval;
        int                     y1a, x1a, y2a, x2a;
        int                     y1b, x1b, y2b, x2b;
        bool            light;
        cave_type   *c_ptr;

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, 11, 25)) return FALSE;

        /* Choose lite or dark */
        light = ((dun_level <= randint1(25)) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS));

        /* Determine extents of the first room */
        y1a = yval - randint1(4);
        y2a = yval + randint1(3);
        x1a = xval - randint1(11);
        x2a = xval + randint1(10);

        /* Determine extents of the second room */
        y1b = yval - randint1(3);
        y2b = yval + randint1(4);
        x1b = xval - randint1(10);
        x2b = xval + randint1(11);


        /* Place a full floor for room "a" */
        for (y = y1a - 1; y <= y2a + 1; y++)
        {
                for (x = x1a - 1; x <= x2a + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }

        /* Place a full floor for room "b" */
        for (y = y1b - 1; y <= y2b + 1; y++)
        {
                for (x = x1b - 1; x <= x2b + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }


        /* Place the walls around room "a" */
        for (y = y1a - 1; y <= y2a + 1; y++)
        {
                c_ptr = &cave[y][x1a - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2a + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1a - 1; x <= x2a + 1; x++)
        {
                c_ptr = &cave[y1a - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2a + 1][x];
                place_outer_grid(c_ptr);
        }

        /* Place the walls around room "b" */
        for (y = y1b - 1; y <= y2b + 1; y++)
        {
                c_ptr = &cave[y][x1b - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2b + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1b - 1; x <= x2b + 1; x++)
        {
                c_ptr = &cave[y1b - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2b + 1][x];
                place_outer_grid(c_ptr);
        }



        /* Replace the floor for room "a" */
        for (y = y1a; y <= y2a; y++)
        {
                for (x = x1a; x <= x2a; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                }
        }

        /* Replace the floor for room "b" */
        for (y = y1b; y <= y2b; y++)
        {
                for (x = x1b; x <= x2b; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                }
        }

        return TRUE;
}



/*!
 * @brief ¥¿¥¤¥×2¤ÎÉô²°¡Ä½½»ú·¿¤ÎÉô²°¤òÀ¸À®¤¹¤ë / Type 3 -- Cross shaped rooms
 * @return ¤Ê¤·
 * @details
 * Builds a room at a row, column coordinate\n
 *\n
 * Room "a" runs north/south, and Room "b" runs east/east\n
 * So the "central pillar" runs from x1a, y1b to x2a, y2b.\n
 *\n
 * Note that currently, the "center" is always 3x3, but I think that\n
 * the code below will work (with "bounds checking") for 5x5, or even\n
 * for unsymetric values like 4x3 or 5x3 or 3x4 or 3x5, or even larger.\n
 */
static bool build_type3(void)
{
        int                     y, x, dy, dx, wy, wx;
        int                     y1a, x1a, y2a, x2a;
        int                     y1b, x1b, y2b, x2b;
        int                     yval, xval;
        bool            light;
        cave_type   *c_ptr;


        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, 11, 25)) return FALSE;


        /* Choose lite or dark */
        light = ((dun_level <= randint1(25)) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS));

        /* For now, always 3x3 */
        wx = wy = 1;

        /* Pick max vertical size (at most 4) */
        dy = rand_range(3, 4);

        /* Pick max horizontal size (at most 15) */
        dx = rand_range(3, 11);


        /* Determine extents of the north/south room */
        y1a = yval - dy;
        y2a = yval + dy;
        x1a = xval - wx;
        x2a = xval + wx;

        /* Determine extents of the east/west room */
        y1b = yval - wy;
        y2b = yval + wy;
        x1b = xval - dx;
        x2b = xval + dx;


        /* Place a full floor for room "a" */
        for (y = y1a - 1; y <= y2a + 1; y++)
        {
                for (x = x1a - 1; x <= x2a + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }

        /* Place a full floor for room "b" */
        for (y = y1b - 1; y <= y2b + 1; y++)
        {
                for (x = x1b - 1; x <= x2b + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }


        /* Place the walls around room "a" */
        for (y = y1a - 1; y <= y2a + 1; y++)
        {
                c_ptr = &cave[y][x1a - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2a + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1a - 1; x <= x2a + 1; x++)
        {
                c_ptr = &cave[y1a - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2a + 1][x];
                place_outer_grid(c_ptr);
        }

        /* Place the walls around room "b" */
        for (y = y1b - 1; y <= y2b + 1; y++)
        {
                c_ptr = &cave[y][x1b - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2b + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1b - 1; x <= x2b + 1; x++)
        {
                c_ptr = &cave[y1b - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2b + 1][x];
                place_outer_grid(c_ptr);
        }


        /* Replace the floor for room "a" */
        for (y = y1a; y <= y2a; y++)
        {
                for (x = x1a; x <= x2a; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                }
        }

        /* Replace the floor for room "b" */
        for (y = y1b; y <= y2b; y++)
        {
                for (x = x1b; x <= x2b; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                }
        }



        /* Special features (3/4) */
        switch (randint0(4))
        {
                /* Large solid middle pillar */
                case 1:
                {
                        for (y = y1b; y <= y2b; y++)
                        {
                                for (x = x1a; x <= x2a; x++)
                                {
                                        c_ptr = &cave[y][x];
                                        place_inner_grid(c_ptr);
                                }
                        }
                        break;
                }

                /* Inner treasure vault */
                case 2:
                {
                        /* Build the vault */
                        for (y = y1b; y <= y2b; y++)
                        {
                                c_ptr = &cave[y][x1a];
                                place_inner_grid(c_ptr);
                                c_ptr = &cave[y][x2a];
                                place_inner_grid(c_ptr);
                        }
                        for (x = x1a; x <= x2a; x++)
                        {
                                c_ptr = &cave[y1b][x];
                                place_inner_grid(c_ptr);
                                c_ptr = &cave[y2b][x];
                                place_inner_grid(c_ptr);
                        }

                        /* Place a secret door on the inner room */
                        switch (randint0(4))
                        {
                                case 0: place_secret_door(y1b, xval, DOOR_DEFAULT); break;
                                case 1: place_secret_door(y2b, xval, DOOR_DEFAULT); break;
                                case 2: place_secret_door(yval, x1a, DOOR_DEFAULT); break;
                                case 3: place_secret_door(yval, x2a, DOOR_DEFAULT); break;
                        }

                        /* Place a treasure in the vault */
                        place_object(yval, xval, 0L);

                        /* Let's guard the treasure well */
                        vault_monsters(yval, xval, randint0(2) + 3);

                        /* Traps naturally */
                        vault_traps(yval, xval, 4, 4, randint0(3) + 2);

                        break;
                }

                /* Something else */
                case 3:
                {
                        /* Occasionally pinch the center shut */
                        if (one_in_(3))
                        {
                                /* Pinch the east/west sides */
                                for (y = y1b; y <= y2b; y++)
                                {
                                        if (y == yval) continue;
                                        c_ptr = &cave[y][x1a - 1];
                                        place_inner_grid(c_ptr);
                                        c_ptr = &cave[y][x2a + 1];
                                        place_inner_grid(c_ptr);
                                }

                                /* Pinch the north/south sides */
                                for (x = x1a; x <= x2a; x++)
                                {
                                        if (x == xval) continue;
                                        c_ptr = &cave[y1b - 1][x];
                                        place_inner_grid(c_ptr);
                                        c_ptr = &cave[y2b + 1][x];
                                        place_inner_grid(c_ptr);
                                }

                                /* Sometimes shut using secret doors */
                                if (one_in_(3))
                                {
                                        int door_type = ((d_info[dungeon_type].flags1 & DF1_CURTAIN) &&
                                                one_in_((d_info[dungeon_type].flags1 & DF1_NO_CAVE) ? 16 : 256)) ? DOOR_CURTAIN :
                                                ((d_info[dungeon_type].flags1 & DF1_GLASS_DOOR) ? DOOR_GLASS_DOOR : DOOR_DOOR);

                                        place_secret_door(yval, x1a - 1, door_type);
                                        place_secret_door(yval, x2a + 1, door_type);
                                        place_secret_door(y1b - 1, xval, door_type);
                                        place_secret_door(y2b + 1, xval, door_type);
                                }
                        }

                        /* Occasionally put a "plus" in the center */
                        else if (one_in_(3))
                        {
                                c_ptr = &cave[yval][xval];
                                place_inner_grid(c_ptr);
                                c_ptr = &cave[y1b][xval];
                                place_inner_grid(c_ptr);
                                c_ptr = &cave[y2b][xval];
                                place_inner_grid(c_ptr);
                                c_ptr = &cave[yval][x1a];
                                place_inner_grid(c_ptr);
                                c_ptr = &cave[yval][x2a];
                                place_inner_grid(c_ptr);
                        }

                        /* Occasionally put a pillar in the center */
                        else if (one_in_(3))
                        {
                                c_ptr = &cave[yval][xval];
                                place_inner_grid(c_ptr);
                        }

                        break;
                }
        }

        return TRUE;
}


/*!
 * @brief ¥¿¥¤¥×4¤ÎÉô²°¡Ä¸ÇÄꥵ¥¤¥º¤ÎÆó½Å¹½Â¤Éô²°¤òÀ¸À®¤¹¤ë / Type 4 -- Large room with inner features
 * @return ¤Ê¤·
 * @details
 * Possible sub-types:\n
 *      1 - Just an inner room with one door\n
 *      2 - An inner room within an inner room\n
 *      3 - An inner room with pillar(s)\n
 *      4 - Inner room has a maze\n
 *      5 - A set of four inner rooms\n
 */
static bool build_type4(void)
{
        int         y, x, y1, x1;
        int         y2, x2, tmp, yval, xval;
        bool        light;
        cave_type   *c_ptr;


        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, 11, 25)) return FALSE;

        /* Choose lite or dark */
        light = ((dun_level <= randint1(25)) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS));

        /* Large room */
        y1 = yval - 4;
        y2 = yval + 4;
        x1 = xval - 11;
        x2 = xval + 11;

        /* Place a full floor under the room */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }

        /* Outer Walls */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2 + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2 + 1][x];
                place_outer_grid(c_ptr);
        }


        /* The inner room */
        y1 = y1 + 2;
        y2 = y2 - 2;
        x1 = x1 + 2;
        x2 = x2 - 2;

        /* The inner walls */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_inner_grid(c_ptr);
                c_ptr = &cave[y][x2 + 1];
                place_inner_grid(c_ptr);
        }
        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_inner_grid(c_ptr);
                c_ptr = &cave[y2 + 1][x];
                place_inner_grid(c_ptr);
        }


        /* Inner room variations */
        switch (randint1(5))
        {
                /* Just an inner room with a monster */
                case 1:
                {
                        /* Place a secret door */
                        switch (randint1(4))
                        {
                                case 1: place_secret_door(y1 - 1, xval, DOOR_DEFAULT); break;
                                case 2: place_secret_door(y2 + 1, xval, DOOR_DEFAULT); break;
                                case 3: place_secret_door(yval, x1 - 1, DOOR_DEFAULT); break;
                                case 4: place_secret_door(yval, x2 + 1, DOOR_DEFAULT); break;
                        }

                        /* Place a monster in the room */
                        vault_monsters(yval, xval, 1);

                        break;
                }

                /* Treasure Vault (with a door) */
                case 2:
                {
                        /* Place a secret door */
                        switch (randint1(4))
                        {
                                case 1: place_secret_door(y1 - 1, xval, DOOR_DEFAULT); break;
                                case 2: place_secret_door(y2 + 1, xval, DOOR_DEFAULT); break;
                                case 3: place_secret_door(yval, x1 - 1, DOOR_DEFAULT); break;
                                case 4: place_secret_door(yval, x2 + 1, DOOR_DEFAULT); break;
                        }

                        /* Place another inner room */
                        for (y = yval - 1; y <= yval + 1; y++)
                        {
                                for (x = xval -  1; x <= xval + 1; x++)
                                {
                                        if ((x == xval) && (y == yval)) continue;
                                        c_ptr = &cave[y][x];
                                        place_inner_grid(c_ptr);
                                }
                        }

                        /* Place a locked door on the inner room */
                        switch (randint1(4))
                        {
                                case 1: place_locked_door(yval - 1, xval); break;
                                case 2: place_locked_door(yval + 1, xval); break;
                                case 3: place_locked_door(yval, xval - 1); break;
                                case 4: place_locked_door(yval, xval + 1); break;
                        }

                        /* Monsters to guard the "treasure" */
                        vault_monsters(yval, xval, randint1(3) + 2);

                        /* Object (80%) */
                        if (randint0(100) < 80)
                        {
                                place_object(yval, xval, 0L);
                        }

                        /* Stairs (20%) */
                        else
                        {
                                place_random_stairs(yval, xval);
                        }

                        /* Traps to protect the treasure */
                        vault_traps(yval, xval, 4, 10, 2 + randint1(3));

                        break;
                }

                /* Inner pillar(s). */
                case 3:
                {
                        /* Place a secret door */
                        switch (randint1(4))
                        {
                                case 1: place_secret_door(y1 - 1, xval, DOOR_DEFAULT); break;
                                case 2: place_secret_door(y2 + 1, xval, DOOR_DEFAULT); break;
                                case 3: place_secret_door(yval, x1 - 1, DOOR_DEFAULT); break;
                                case 4: place_secret_door(yval, x2 + 1, DOOR_DEFAULT); break;
                        }

                        /* Large Inner Pillar */
                        for (y = yval - 1; y <= yval + 1; y++)
                        {
                                for (x = xval - 1; x <= xval + 1; x++)
                                {
                                c_ptr = &cave[y][x];
                                place_inner_grid(c_ptr);
                                }
                        }

                        /* Occasionally, two more Large Inner Pillars */
                        if (one_in_(2))
                        {
                                tmp = randint1(2);
                                for (y = yval - 1; y <= yval + 1; y++)
                                {
                                        for (x = xval - 5 - tmp; x <= xval - 3 - tmp; x++)
                                        {
                                        c_ptr = &cave[y][x];
                                        place_inner_grid(c_ptr);
                                        }
                                        for (x = xval + 3 + tmp; x <= xval + 5 + tmp; x++)
                                        {
                                        c_ptr = &cave[y][x];
                                        place_inner_grid(c_ptr);
                                        }
                                }
                        }

                        /* Occasionally, some Inner rooms */
                        if (one_in_(3))
                        {
                                int door_type = ((d_info[dungeon_type].flags1 & DF1_CURTAIN) &&
                                        one_in_((d_info[dungeon_type].flags1 & DF1_NO_CAVE) ? 16 : 256)) ? DOOR_CURTAIN :
                                        ((d_info[dungeon_type].flags1 & DF1_GLASS_DOOR) ? DOOR_GLASS_DOOR : DOOR_DOOR);

                                /* Long horizontal walls */
                                for (x = xval - 5; x <= xval + 5; x++)
                                {
                                c_ptr = &cave[yval - 1][x];
                                place_inner_grid(c_ptr);
                                c_ptr = &cave[yval + 1][x];
                                place_inner_grid(c_ptr);
                                }

                                /* Close off the left/right edges */
                                c_ptr = &cave[yval][xval - 5];
                                place_inner_grid(c_ptr);
                                c_ptr = &cave[yval][xval + 5];
                                place_inner_grid(c_ptr);

                                /* Secret doors (random top/bottom) */
                                place_secret_door(yval - 3 + (randint1(2) * 2), xval - 3, door_type);
                                place_secret_door(yval - 3 + (randint1(2) * 2), xval + 3, door_type);

                                /* Monsters */
                                vault_monsters(yval, xval - 2, randint1(2));
                                vault_monsters(yval, xval + 2, randint1(2));

                                /* Objects */
                                if (one_in_(3)) place_object(yval, xval - 2, 0L);
                                if (one_in_(3)) place_object(yval, xval + 2, 0L);
                        }

                        break;
                }

                /* Maze inside. */
                case 4:
                {
                        /* Place a secret door */
                        switch (randint1(4))
                        {
                                case 1: place_secret_door(y1 - 1, xval, DOOR_DEFAULT); break;
                                case 2: place_secret_door(y2 + 1, xval, DOOR_DEFAULT); break;
                                case 3: place_secret_door(yval, x1 - 1, DOOR_DEFAULT); break;
                                case 4: place_secret_door(yval, x2 + 1, DOOR_DEFAULT); break;
                        }

                        /* Maze (really a checkerboard) */
                        for (y = y1; y <= y2; y++)
                        {
                                for (x = x1; x <= x2; x++)
                                {
                                        if (0x1 & (x + y))
                                        {
                                                c_ptr = &cave[y][x];
                                                place_inner_grid(c_ptr);
                                        }
                                }
                        }

                        /* Monsters just love mazes. */
                        vault_monsters(yval, xval - 5, randint1(3));
                        vault_monsters(yval, xval + 5, randint1(3));

                        /* Traps make them entertaining. */
                        vault_traps(yval, xval - 3, 2, 8, randint1(3));
                        vault_traps(yval, xval + 3, 2, 8, randint1(3));

                        /* Mazes should have some treasure too. */
                        vault_objects(yval, xval, 3);

                        break;
                }

                /* Four small rooms. */
                case 5:
                {
                        int door_type = ((d_info[dungeon_type].flags1 & DF1_CURTAIN) &&
                                one_in_((d_info[dungeon_type].flags1 & DF1_NO_CAVE) ? 16 : 256)) ? DOOR_CURTAIN :
                                ((d_info[dungeon_type].flags1 & DF1_GLASS_DOOR) ? DOOR_GLASS_DOOR : DOOR_DOOR);

                        /* Inner "cross" */
                        for (y = y1; y <= y2; y++)
                        {
                                c_ptr = &cave[y][xval];
                                place_inner_grid(c_ptr);
                        }
                        for (x = x1; x <= x2; x++)
                        {
                                c_ptr = &cave[yval][x];
                                place_inner_grid(c_ptr);
                        }

                        /* Doors into the rooms */
                        if (randint0(100) < 50)
                        {
                                int i = randint1(10);
                                place_secret_door(y1 - 1, xval - i, door_type);
                                place_secret_door(y1 - 1, xval + i, door_type);
                                place_secret_door(y2 + 1, xval - i, door_type);
                                place_secret_door(y2 + 1, xval + i, door_type);
                        }
                        else
                        {
                                int i = randint1(3);
                                place_secret_door(yval + i, x1 - 1, door_type);
                                place_secret_door(yval - i, x1 - 1, door_type);
                                place_secret_door(yval + i, x2 + 1, door_type);
                                place_secret_door(yval - i, x2 + 1, door_type);
                        }

                        /* Treasure, centered at the center of the cross */
                        vault_objects(yval, xval, 2 + randint1(2));

                        /* Gotta have some monsters. */
                        vault_monsters(yval + 1, xval - 4, randint1(4));
                        vault_monsters(yval + 1, xval + 4, randint1(4));
                        vault_monsters(yval - 1, xval - 4, randint1(4));
                        vault_monsters(yval - 1, xval + 4, randint1(4));

                        break;
                }
        }

        return TRUE;
}



/*!
 * vault¤ËÇÛÃÖ²Äǽ¤Ê¥â¥ó¥¹¥¿¡¼¤Î¾ò·ï¤ò»ØÄꤹ¤ë¥Þ¥¯¥í / Monster validation macro
 *
 * Line 1 -- forbid town monsters
 * Line 2 -- forbid uniques
 * Line 3 -- forbid aquatic monsters
 */
#define vault_monster_okay(I) \
        (mon_hook_dungeon(I) && \
         !(r_info[I].flags1 & RF1_UNIQUE) && \
         !(r_info[I].flags7 & RF7_UNIQUE2) && \
         !(r_info[I].flagsr & RFR_RES_ALL) && \
         !(r_info[I].flags7 & RF7_AQUATIC))


/*! Ä̾ïpitÀ¸À®»þ¤Î¥â¥ó¥¹¥¿¡¼¤Î¹½À®¾ò·ïID / Race index for "monster pit (clone)" */
static int vault_aux_race;

/*! ñ°ì¥·¥ó¥Ü¥ëpitÀ¸À®»þ¤Î»ØÄꥷ¥ó¥Ü¥ë / Race index for "monster pit (symbol clone)" */
static char vault_aux_char;

/*! ¥Ö¥ì¥¹Â°À­¤Ë´ð¤Å¤¯¥É¥é¥´¥ópitÀ¸À®»þ¾ò·ï¥Þ¥¹¥¯ / Breath mask for "monster pit (dragon)" */
static u32b vault_aux_dragon_mask4;


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬VaultÀ¸À®¤ÎºÇÄãɬÍ×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper monster selection function
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return VaultÀ¸À®¤ÎºÇÄãɬÍ×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_simple(int r_idx)
{
        /* Okay */
        return (vault_monster_okay(r_idx));
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¥¼¥ê¡¼nest¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster nest (jelly)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_jelly(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        if ((r_ptr->flags2 & RF2_KILL_BODY) && !(r_ptr->flags1 & RF1_NEVER_BLOW)) return (FALSE);

        /* Also decline evil jellies (like death molds and shoggoths) */
        if (r_ptr->flags3 & (RF3_EVIL)) return (FALSE);

        /* Require icky thing, jelly, mold, or mushroom */
        if (!my_strchr("ijm,", r_ptr->d_char)) return (FALSE);

        /* Okay */
        return (TRUE);
}

/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬Æ°Êªnest¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster nest (animal)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_animal(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        /* Require "animal" flag */
        if (!(r_ptr->flags3 & (RF3_ANIMAL))) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¥¢¥ó¥Ç¥Ã¥Énest¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster nest (undead)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_undead(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        /* Require Undead */
        if (!(r_ptr->flags3 & (RF3_UNDEAD))) return (FALSE);

        /* Okay */
        return (TRUE);
}

/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬À»Æ²nest¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster nest (chapel)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_chapel_g(int r_idx)
{
        static int chapel_list[] = {
                MON_NOV_PRIEST, MON_NOV_PALADIN, MON_NOV_PRIEST_G, MON_NOV_PALADIN_G, 
                MON_PRIEST, MON_JADE_MONK, MON_IVORY_MONK, MON_ULTRA_PALADIN, 
                MON_EBONY_MONK, MON_W_KNIGHT, MON_KNI_TEMPLAR, MON_PALADIN,
                MON_TOPAZ_MONK, 0};

        int i;

        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        if (r_ptr->flags3 & (RF3_EVIL)) return (FALSE);
        if ((r_idx == MON_A_GOLD) || (r_idx == MON_A_SILVER)) return (FALSE);

        /* Require "priest" or Angel */

        if (r_ptr->d_char == 'A') return TRUE;

        for (i = 0; chapel_list[i]; i++)
                if (r_idx == chapel_list[i]) return TRUE;

        return FALSE;
}

/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¸¤¾®²°nest¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster nest (kennel)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_kennel(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        /* Require a Zephyr Hound or a dog */
        if (!my_strchr("CZ", r_ptr->d_char)) return (FALSE);
  
        /* Okay */
        return (TRUE);
}

/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¥ß¥ß¥Ã¥¯nest¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster nest (mimic)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_mimic(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        /* Require mimic */
        if (!my_strchr("!$&(/=?[\\|", r_ptr->d_char)) return (FALSE);

        /* Okay */
        return (TRUE);
}

/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬Ã±°ì¥¯¥í¡¼¥ónest¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster nest (clone)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_clone(int r_idx)
{
        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        return (r_idx == vault_aux_race);
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¼Ù°­Â°À­¥·¥ó¥Ü¥ë¥¯¥í¡¼¥ónest¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster nest (symbol clone)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_symbol_e(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        if ((r_ptr->flags2 & RF2_KILL_BODY) && !(r_ptr->flags1 & RF1_NEVER_BLOW)) return (FALSE);

        if (r_ptr->flags3 & (RF3_GOOD)) return (FALSE);

        /* Decline incorrect symbol */
        if (r_ptr->d_char != vault_aux_char) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬Á±ÎÉ°À­¥·¥ó¥Ü¥ë¥¯¥í¡¼¥ónest¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster nest (symbol clone)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_symbol_g(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        if ((r_ptr->flags2 & RF2_KILL_BODY) && !(r_ptr->flags1 & RF1_NEVER_BLOW)) return (FALSE);

        if (r_ptr->flags3 & (RF3_EVIL)) return (FALSE);

        /* Decline incorrect symbol */
        if (r_ptr->d_char != vault_aux_char) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¥ª¡¼¥¯pit¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster pit (orc)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_orc(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        /* Require orc */
        if (!(r_ptr->flags3 & RF3_ORC)) return (FALSE);

        /* Decline undead */
        if (r_ptr->flags3 & RF3_UNDEAD) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¥È¥í¥ëpit¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster pit (troll)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_troll(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        /* Require troll */
        if (!(r_ptr->flags3 & RF3_TROLL)) return (FALSE);

        /* Decline undead */
        if (r_ptr->flags3 & RF3_UNDEAD) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬µð¿Ípit¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster pit (giant)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_giant(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        /* Require giant */
        if (!(r_ptr->flags3 & RF3_GIANT)) return (FALSE);

        if (r_ptr->flags3 & RF3_GOOD) return (FALSE);

        /* Decline undead */
        if (r_ptr->flags3 & RF3_UNDEAD) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¥É¥é¥´¥ópit¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster pit (dragon)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_dragon(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        /* Require dragon */
        if (!(r_ptr->flags3 & RF3_DRAGON)) return (FALSE);

        /* Hack -- Require correct "breath attack" */
        if (r_ptr->flags4 != vault_aux_dragon_mask4) return (FALSE);

        /* Decline undead */
        if (r_ptr->flags3 & RF3_UNDEAD) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬°­Ëâpit¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster pit (demon)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_demon(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        if ((r_ptr->flags2 & RF2_KILL_BODY) && !(r_ptr->flags1 & RF1_NEVER_BLOW)) return (FALSE);

        /* Require demon */
        if (!(r_ptr->flags3 & RF3_DEMON)) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¶¸µ¤pit¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster pit (lovecraftian)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_cthulhu(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        if ((r_ptr->flags2 & RF2_KILL_BODY) && !(r_ptr->flags1 & RF1_NEVER_BLOW)) return (FALSE);

        /* Require eldritch horror */
        if (!(r_ptr->flags2 & (RF2_ELDRITCH_HORROR))) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*!
 * @brief pit/nest¤Î´ð½à¤È¤Ê¤ëñ¼ï¥â¥ó¥¹¥¿¡¼¤ò·è¤á¤ë /
 * @return ¤Ê¤·
 */
static void vault_prep_clone(void)
{
        /* Apply the monster restriction */
        get_mon_num_prep(vault_aux_simple, NULL);

        /* Pick a race to clone */
        vault_aux_race = get_mon_num(dun_level + 10);

        /* Remove the monster restriction */
        get_mon_num_prep(NULL, NULL);
}


/*!
 * @brief pit/nest¤Î´ð½à¤È¤Ê¤ë¥â¥ó¥¹¥¿¡¼¥·¥ó¥Ü¥ë¤ò·è¤á¤ë /
 * @return ¤Ê¤·
 */
static void vault_prep_symbol(void)
{
        int r_idx;

        /* Apply the monster restriction */
        get_mon_num_prep(vault_aux_simple, NULL);

        /* Pick a race to clone */
        r_idx = get_mon_num(dun_level + 10);

        /* Remove the monster restriction */
        get_mon_num_prep(NULL, NULL);

        /* Extract the symbol */
        vault_aux_char = r_info[r_idx].d_char;
}

/*!
 * @brief pit/nest¤Î´ð½à¤È¤Ê¤ë¥É¥é¥´¥ó¤Î¼ïÎà¤ò·è¤á¤ë /
 * @return ¤Ê¤·
 */
static void vault_prep_dragon(void)
{
        /* Pick dragon type */
        switch (randint0(6))
        {
                /* Black */
                case 0:
                {
                        /* Restrict dragon breath type */
                        vault_aux_dragon_mask4 = RF4_BR_ACID;

                        /* Done */
                        break;
                }

                /* Blue */
                case 1:
                {
                        /* Restrict dragon breath type */
                        vault_aux_dragon_mask4 = RF4_BR_ELEC;

                        /* Done */
                        break;
                }

                /* Red */
                case 2:
                {
                        /* Restrict dragon breath type */
                        vault_aux_dragon_mask4 = RF4_BR_FIRE;

                        /* Done */
                        break;
                }

                /* White */
                case 3:
                {
                        /* Restrict dragon breath type */
                        vault_aux_dragon_mask4 = RF4_BR_COLD;

                        /* Done */
                        break;
                }

                /* Green */
                case 4:
                {
                        /* Restrict dragon breath type */
                        vault_aux_dragon_mask4 = RF4_BR_POIS;

                        /* Done */
                        break;
                }

                /* Multi-hued */
                default:
                {
                        /* Restrict dragon breath type */
                        vault_aux_dragon_mask4 = (RF4_BR_ACID | RF4_BR_ELEC |
                                                                                          RF4_BR_FIRE | RF4_BR_COLD |
                                                                                          RF4_BR_POIS);

                        /* Done */
                        break;
                }
        }
}


/*!
 * @brief ¥â¥ó¥¹¥¿¡¼¤¬¥À¡¼¥¯¥¨¥ë¥Õpit¤ÎÀ¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤«¤òÊÖ¤¹ /
 * Helper function for "monster pit (dark elf)"
 * @param r_idx ³Îǧ¤·¤¿¤¤¥â¥ó¥¹¥¿¡¼¼ï²ID
 * @return À¸À®É¬Í×¾ò·ï¤òËþ¤¿¤·¤Æ¤¤¤ë¤Ê¤éTRUE¤òÊÖ¤¹¡£
 */
static bool vault_aux_dark_elf(int r_idx)
{
        int i;
        static int dark_elf_list[] =
        {
                MON_D_ELF, MON_D_ELF_MAGE, MON_D_ELF_WARRIOR, MON_D_ELF_PRIEST,
                MON_D_ELF_LORD, MON_D_ELF_WARLOCK, MON_D_ELF_DRUID, MON_NIGHTBLADE,
                MON_D_ELF_SORC, MON_D_ELF_SHADE, 0,
        };

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return FALSE;

        /* Require dark elves */
        for (i = 0; dark_elf_list[i]; i++)
                if (r_idx == dark_elf_list[i]) return TRUE;

        /* Assume not */
        return FALSE;
}

/*! pit/nest·¿¾ðÊó¤Îtypedef */
typedef struct vault_aux_type vault_aux_type;

/*! pit/nest·¿¾ðÊó¤Î¹½Â¤ÂÎÄêµÁ */
struct vault_aux_type
{
        cptr name;
        bool (*hook_func)(int r_idx);
        void (*prep_func)(void);
        int level;
        int chance;
};

/*!
 * @brief ¥À¥ó¥¸¥ç¥óËè¤Ë»ØÄꤵ¤ì¤¿¥Ô¥Ã¥ÈÇÛÎó¤ò´ð½à¤Ë¥é¥ó¥À¥à¤Êpit/nest¥¿¥¤¥×¤ò·è¤á¤ë
 * @param l_ptr ÁªÂò¤µ¤ì¤¿pit/nest¾ðÊó¤òÊÖ¤¹»²¾È¥Ý¥¤¥ó¥¿
 * @param allow_flag_mask À¸À®¤¬µö¤µ¤ì¤ëpit/nest¤Î¥Ó¥Ã¥ÈÇÛÎó
 * @return ÁªÂò¤µ¤ì¤¿pit/nest¤ÎID¡¢ÁªÂò¼ºÇÔ¤·¤¿¾ì¹ç-1¤òÊÖ¤¹¡£
 */
static int pick_vault_type(vault_aux_type *l_ptr, s16b allow_flag_mask)
{
        int tmp, total, count;

        vault_aux_type *n_ptr;

        /* Calculate the total possibilities */
        for (n_ptr = l_ptr, total = 0, count = 0; TRUE; n_ptr++, count++)
        {
                /* Note end */
                if (!n_ptr->name) break;

                /* Ignore excessive depth */
                if (n_ptr->level > dun_level) continue;

                /* Not matched with pit/nest flag */
                if (!(allow_flag_mask & (1L << count))) continue;

                /* Count this possibility */
                total += n_ptr->chance * MAX_DEPTH / (MIN(dun_level, MAX_DEPTH - 1) - n_ptr->level + 5);
        }

        /* Pick a random type */
        tmp = randint0(total);

        /* Find this type */
        for (n_ptr = l_ptr, total = 0, count = 0; TRUE; n_ptr++, count++)
        {
                /* Note end */
                if (!n_ptr->name) break;

                /* Ignore excessive depth */
                if (n_ptr->level > dun_level) continue;

                /* Not matched with pit/nest flag */
                if (!(allow_flag_mask & (1L << count))) continue;

                /* Count this possibility */
                total += n_ptr->chance * MAX_DEPTH / (MIN(dun_level, MAX_DEPTH - 1) - n_ptr->level + 5);

                /* Found the type */
                if (tmp < total) break;
        }

        return n_ptr->name ? count : -1;
}

/*!nest¾ðÊó¥Æ¡¼¥Ö¥ë*/
static vault_aux_type nest_types[] =
{
#ifdef JP
        {"¥¯¥í¡¼¥ó",     vault_aux_clone,    vault_prep_clone,   5, 3},
        {"¥¼¥ê¡¼",       vault_aux_jelly,    NULL,               5, 6},
        {"¥·¥ó¥Ü¥ë(Á±)", vault_aux_symbol_g, vault_prep_symbol, 25, 2},
        {"¥·¥ó¥Ü¥ë(°­)", vault_aux_symbol_e, vault_prep_symbol, 25, 2},
        {"¥ß¥ß¥Ã¥¯",     vault_aux_mimic,    NULL,              30, 4},
        {"¶¸µ¤",         vault_aux_cthulhu,  NULL,              70, 2},
        {"¸¤¾®²°",       vault_aux_kennel,   NULL,              45, 4},
        {"ưʪ±à",       vault_aux_animal,   NULL,              35, 5},
        {"¶µ²ñ",         vault_aux_chapel_g, NULL,              75, 4},
        {"¥¢¥ó¥Ç¥Ã¥É",   vault_aux_undead,   NULL,              75, 5},
        {NULL,           NULL,               NULL,               0, 0},
#else
        {"clone",        vault_aux_clone,    vault_prep_clone,   5, 3},
        {"jelly",        vault_aux_jelly,    NULL,               5, 6},
        {"symbol good",  vault_aux_symbol_g, vault_prep_symbol, 25, 2},
        {"symbol evil",  vault_aux_symbol_e, vault_prep_symbol, 25, 2},
        {"mimic",        vault_aux_mimic,    NULL,              30, 4},
        {"lovecraftian", vault_aux_cthulhu,  NULL,              70, 2},
        {"kennel",       vault_aux_kennel,   NULL,              45, 4},
        {"animal",       vault_aux_animal,   NULL,              35, 5},
        {"chapel",       vault_aux_chapel_g, NULL,              75, 4},
        {"undead",       vault_aux_undead,   NULL,              75, 5},
        {NULL,           NULL,               NULL,               0, 0},
#endif
};

/*!pit¾ðÊó¥Æ¡¼¥Ö¥ë*/
static vault_aux_type pit_types[] =
{
#ifdef JP
        {"¥ª¡¼¥¯",       vault_aux_orc,      NULL,               5, 6},
        {"¥È¥í¥ë",       vault_aux_troll,    NULL,              20, 6},
        {"¥¸¥ã¥¤¥¢¥ó¥È", vault_aux_giant,    NULL,              50, 6},
        {"¶¸µ¤",         vault_aux_cthulhu,  NULL,              80, 2},
        {"¥·¥ó¥Ü¥ë(Á±)", vault_aux_symbol_g, vault_prep_symbol, 70, 1},
        {"¥·¥ó¥Ü¥ë(°­)", vault_aux_symbol_e, vault_prep_symbol, 70, 1},
        {"¶µ²ñ",         vault_aux_chapel_g, NULL,              65, 2},
        {"¥É¥é¥´¥ó",     vault_aux_dragon,   vault_prep_dragon, 70, 6},
        {"¥Ç¡¼¥â¥ó",     vault_aux_demon,    NULL,              80, 6},
        {"¥À¡¼¥¯¥¨¥ë¥Õ", vault_aux_dark_elf, NULL,              45, 4},
        {NULL,           NULL,               NULL,               0, 0},
#else
        {"orc",          vault_aux_orc,      NULL,               5, 6},
        {"troll",        vault_aux_troll,    NULL,              20, 6},
        {"giant",        vault_aux_giant,    NULL,              50, 6},
        {"lovecraftian", vault_aux_cthulhu,  NULL,              80, 2},
        {"symbol good",  vault_aux_symbol_g, vault_prep_symbol, 70, 1},
        {"symbol evil",  vault_aux_symbol_e, vault_prep_symbol, 70, 1},
        {"chapel",       vault_aux_chapel_g, NULL,              65, 2},
        {"dragon",       vault_aux_dragon,   vault_prep_dragon, 70, 6},
        {"demon",        vault_aux_demon,    NULL,              80, 6},
        {"dark elf",     vault_aux_dark_elf, NULL,              45, 4},
        {NULL,           NULL,               NULL,               0, 0},
#endif
};


/* Nest types code */
#define NEST_TYPE_CLONE        0
#define NEST_TYPE_JELLY        1
#define NEST_TYPE_SYMBOL_GOOD  2
#define NEST_TYPE_SYMBOL_EVIL  3
#define NEST_TYPE_MIMIC        4
#define NEST_TYPE_LOVECRAFTIAN 5
#define NEST_TYPE_KENNEL       6
#define NEST_TYPE_ANIMAL       7
#define NEST_TYPE_CHAPEL       8
#define NEST_TYPE_UNDEAD       9

/* Pit types code */
#define PIT_TYPE_ORC           0
#define PIT_TYPE_TROLL         1
#define PIT_TYPE_GIANT         2
#define PIT_TYPE_LOVECRAFTIAN  3
#define PIT_TYPE_SYMBOL_GOOD   4
#define PIT_TYPE_SYMBOL_EVIL   5
#define PIT_TYPE_CHAPEL        6
#define PIT_TYPE_DRAGON        7
#define PIT_TYPE_DEMON         8
#define PIT_TYPE_DARK_ELF      9


/*
 * Hack -- Get the string describing subtype of pit/nest
 * Determined in prepare function (some pit/nest only)
 */
static cptr pit_subtype_string(int type, bool nest)
{
        static char inner_buf[256] = "";

        inner_buf[0] = '\0'; /* Init string */

        if (nest) /* Nests */
        {
                switch (type)
                {
                case NEST_TYPE_CLONE:
                        sprintf(inner_buf, "(%s)", r_name + r_info[vault_aux_race].name);
                        break;
                case NEST_TYPE_SYMBOL_GOOD:
                case NEST_TYPE_SYMBOL_EVIL:
                        sprintf(inner_buf, "(%c)", vault_aux_char);
                        break;
                }
        }
        else /* Pits */
        {
                switch (type)
                {
                case PIT_TYPE_SYMBOL_GOOD:
                case PIT_TYPE_SYMBOL_EVIL:
                        sprintf(inner_buf, "(%c)", vault_aux_char);
                        break;
                case PIT_TYPE_DRAGON:
                        switch (vault_aux_dragon_mask4)
                        {
#ifdef JP
                        case RF4_BR_ACID: strcpy(inner_buf, "(»À)");   break;
                        case RF4_BR_ELEC: strcpy(inner_buf, "(°ðºÊ)"); break;
                        case RF4_BR_FIRE: strcpy(inner_buf, "(²Ð±ê)"); break;
                        case RF4_BR_COLD: strcpy(inner_buf, "(Î䵤)"); break;
                        case RF4_BR_POIS: strcpy(inner_buf, "(ÆÇ)");   break;
                        case (RF4_BR_ACID | RF4_BR_ELEC | RF4_BR_FIRE | RF4_BR_COLD | RF4_BR_POIS):
                                strcpy(inner_buf, "(Ëü¿§)"); break;
                        default: strcpy(inner_buf, "(̤ÄêµÁ)"); break;
#else
                        case RF4_BR_ACID: strcpy(inner_buf, "(acid)");      break;
                        case RF4_BR_ELEC: strcpy(inner_buf, "(lightning)"); break;
                        case RF4_BR_FIRE: strcpy(inner_buf, "(fire)");      break;
                        case RF4_BR_COLD: strcpy(inner_buf, "(frost)");     break;
                        case RF4_BR_POIS: strcpy(inner_buf, "(poison)");    break;
                        case (RF4_BR_ACID | RF4_BR_ELEC | RF4_BR_FIRE | RF4_BR_COLD | RF4_BR_POIS):
                                strcpy(inner_buf, "(multi-hued)"); break;
                        default: strcpy(inner_buf, "(undefined)"); break;
#endif
                        }
                        break;
                }
        }

        return inner_buf;
}


/* A struct for nest monster information with cheat_hear */
typedef struct
{
        s16b r_idx;
        bool used;
}
nest_mon_info_type;


/*
 * Comp function for sorting nest monster information
 */
static bool ang_sort_comp_nest_mon_info(vptr u, vptr v, int a, int b)
{
        nest_mon_info_type *nest_mon_info = (nest_mon_info_type *)u;
        int w1 = nest_mon_info[a].r_idx;
        int w2 = nest_mon_info[b].r_idx;
        monster_race *r1_ptr = &r_info[w1];
        monster_race *r2_ptr = &r_info[w2];
        int z1, z2;

        /* Unused */
        (void)v;

        /* Extract used info */
        z1 = nest_mon_info[a].used;
        z2 = nest_mon_info[b].used;

        /* Compare used status */
        if (z1 < z2) return FALSE;
        if (z1 > z2) return TRUE;

        /* Compare levels */
        if (r1_ptr->level < r2_ptr->level) return TRUE;
        if (r1_ptr->level > r2_ptr->level) return FALSE;

        /* Compare experience */
        if (r1_ptr->mexp < r2_ptr->mexp) return TRUE;
        if (r1_ptr->mexp > r2_ptr->mexp) return FALSE;

        /* Compare indexes */
        return w1 <= w2;
}


/*
 * Swap function for sorting nest monster information
 */
static void ang_sort_swap_nest_mon_info(vptr u, vptr v, int a, int b)
{
        nest_mon_info_type *nest_mon_info = (nest_mon_info_type *)u;
        nest_mon_info_type holder;

        /* Unused */
        (void)v;

        /* Swap */
        holder = nest_mon_info[a];
        nest_mon_info[a] = nest_mon_info[b];
        nest_mon_info[b] = holder;
}


#define NUM_NEST_MON_TYPE 64

/*
 * Type 5 -- Monster nests
 *
 * A monster nest is a "big" room, with an "inner" room, containing
 * a "collection" of monsters of a given type strewn about the room.
 *
 * The monsters are chosen from a set of 64 randomly selected monster
 * races, to allow the nest creation to fail instead of having "holes".
 *
 * Note the use of the "get_mon_num_prep()" function, and the special
 * "get_mon_num_hook()" restriction function, to prepare the "monster
 * allocation table" in such a way as to optimize the selection of
 * "appropriate" non-unique monsters for the nest.
 *
 * Note that the "get_mon_num()" function may (rarely) fail, in which
 * case the nest will be empty.
 *
 * Note that "monster nests" will never contain "unique" monsters.
 */
static bool build_type5(void)
{
        int y, x, y1, x1, y2, x2, xval, yval;
        int i;
        nest_mon_info_type nest_mon_info[NUM_NEST_MON_TYPE];

        monster_type align;

        cave_type *c_ptr;

        int cur_nest_type = pick_vault_type(nest_types, d_info[dungeon_type].nest);
        vault_aux_type *n_ptr;

        /* No type available */
        if (cur_nest_type < 0) return FALSE;

        n_ptr = &nest_types[cur_nest_type];

        /* Process a preparation function if necessary */
        if (n_ptr->prep_func) (*(n_ptr->prep_func))();

        /* Prepare allocation table */
        get_mon_num_prep(n_ptr->hook_func, NULL);

        align.sub_align = SUB_ALIGN_NEUTRAL;

        /* Pick some monster types */
        for (i = 0; i < NUM_NEST_MON_TYPE; i++)
        {
                int r_idx = 0, attempts = 100;
                monster_race *r_ptr = NULL;

                while (attempts--)
                {
                        /* Get a (hard) monster type */
                        r_idx = get_mon_num(dun_level + 11);
                        r_ptr = &r_info[r_idx];

                        /* Decline incorrect alignment */
                        if (monster_has_hostile_align(&align, 0, 0, r_ptr)) continue;

                        /* Accept this monster */
                        break;
                }

                /* Notice failure */
                if (!r_idx || !attempts) return FALSE;

                /* Note the alignment */
                if (r_ptr->flags3 & RF3_EVIL) align.sub_align |= SUB_ALIGN_EVIL;
                if (r_ptr->flags3 & RF3_GOOD) align.sub_align |= SUB_ALIGN_GOOD;

                nest_mon_info[i].r_idx = r_idx;
                nest_mon_info[i].used = FALSE;
        }

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, 11, 25)) return FALSE;

        /* Large room */
        y1 = yval - 4;
        y2 = yval + 4;
        x1 = xval - 11;
        x2 = xval + 11;

        /* Place the floor area */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                }
        }

        /* Place the outer walls */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2 + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2 + 1][x];
                place_outer_grid(c_ptr);
        }


        /* Advance to the center room */
        y1 = y1 + 2;
        y2 = y2 - 2;
        x1 = x1 + 2;
        x2 = x2 - 2;

        /* The inner walls */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_inner_grid(c_ptr);
                c_ptr = &cave[y][x2 + 1];
                place_inner_grid(c_ptr);
        }

        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_inner_grid(c_ptr);
                c_ptr = &cave[y2 + 1][x];
                place_inner_grid(c_ptr);
        }
        for (y = y1; y <= y2; y++)
        {
                for (x = x1; x <= x2; x++)
                {
                        add_cave_info(y, x, CAVE_ICKY);
                }
        }

        /* Place a secret door */
        switch (randint1(4))
        {
                case 1: place_secret_door(y1 - 1, xval, DOOR_DEFAULT); break;
                case 2: place_secret_door(y2 + 1, xval, DOOR_DEFAULT); break;
                case 3: place_secret_door(yval, x1 - 1, DOOR_DEFAULT); break;
                case 4: place_secret_door(yval, x2 + 1, DOOR_DEFAULT); break;
        }

        /* Describe */
        if (cheat_room)
        {
                /* Room type */
#ifdef JP
                msg_format("¥â¥ó¥¹¥¿¡¼Éô²°(nest)(%s%s)", n_ptr->name, pit_subtype_string(cur_nest_type, TRUE));
#else
                msg_format("Monster nest (%s%s)", n_ptr->name, pit_subtype_string(cur_nest_type, TRUE));
#endif
        }

        /* Place some monsters */
        for (y = yval - 2; y <= yval + 2; y++)
        {
                for (x = xval - 9; x <= xval + 9; x++)
                {
                        int r_idx;

                        i = randint0(NUM_NEST_MON_TYPE);
                        r_idx = nest_mon_info[i].r_idx;

                        /* Place that "random" monster (no groups) */
                        (void)place_monster_aux(0, y, x, r_idx, 0L);

                        nest_mon_info[i].used = TRUE;
                }
        }

        if (cheat_room && cheat_hear)
        {
                ang_sort_comp = ang_sort_comp_nest_mon_info;
                ang_sort_swap = ang_sort_swap_nest_mon_info;
                ang_sort(nest_mon_info, NULL, NUM_NEST_MON_TYPE);

                /* Dump the entries (prevent multi-printing) */
                for (i = 0; i < NUM_NEST_MON_TYPE; i++)
                {
                        if (!nest_mon_info[i].used) break;
                        for (; i < NUM_NEST_MON_TYPE - 1; i++)
                        {
                                if (nest_mon_info[i].r_idx != nest_mon_info[i + 1].r_idx) break;
                                if (!nest_mon_info[i + 1].used) break;
                        }
                        msg_print(r_name + r_info[nest_mon_info[i].r_idx].name);
                }
        }

        return TRUE;
}


/*
 * Type 6 -- Monster pits
 *
 * A monster pit is a "big" room, with an "inner" room, containing
 * a "collection" of monsters of a given type organized in the room.
 *
 * The inside room in a monster pit appears as shown below, where the
 * actual monsters in each location depend on the type of the pit
 *
 *   #####################
 *   #0000000000000000000#
 *   #0112233455543322110#
 *   #0112233467643322110#
 *   #0112233455543322110#
 *   #0000000000000000000#
 *   #####################
 *
 * Note that the monsters in the pit are now chosen by using "get_mon_num()"
 * to request 16 "appropriate" monsters, sorting them by level, and using
 * the "even" entries in this sorted list for the contents of the pit.
 *
 * Hack -- all of the "dragons" in a "dragon" pit must be the same "color",
 * which is handled by requiring a specific "breath" attack for all of the
 * dragons.  This may include "multi-hued" breath.  Note that "wyrms" may
 * be present in many of the dragon pits, if they have the proper breath.
 *
 * Note the use of the "get_mon_num_prep()" function, and the special
 * "get_mon_num_hook()" restriction function, to prepare the "monster
 * allocation table" in such a way as to optimize the selection of
 * "appropriate" non-unique monsters for the pit.
 *
 * Note that the "get_mon_num()" function may (rarely) fail, in which case
 * the pit will be empty.
 *
 * Note that "monster pits" will never contain "unique" monsters.
 */
static bool build_type6(void)
{
        int y, x, y1, x1, y2, x2, xval, yval;
        int i, j;

        int what[16];

        monster_type align;

        cave_type *c_ptr;

        int cur_pit_type = pick_vault_type(pit_types, d_info[dungeon_type].pit);
        vault_aux_type *n_ptr;

        /* No type available */
        if (cur_pit_type < 0) return FALSE;

        n_ptr = &pit_types[cur_pit_type];

        /* Process a preparation function if necessary */
        if (n_ptr->prep_func) (*(n_ptr->prep_func))();

        /* Prepare allocation table */
        get_mon_num_prep(n_ptr->hook_func, NULL);

        align.sub_align = SUB_ALIGN_NEUTRAL;

        /* Pick some monster types */
        for (i = 0; i < 16; i++)
        {
                int r_idx = 0, attempts = 100;
                monster_race *r_ptr = NULL;

                while (attempts--)
                {
                        /* Get a (hard) monster type */
                        r_idx = get_mon_num(dun_level + 11);
                        r_ptr = &r_info[r_idx];

                        /* Decline incorrect alignment */
                        if (monster_has_hostile_align(&align, 0, 0, r_ptr)) continue;

                        /* Accept this monster */
                        break;
                }

                /* Notice failure */
                if (!r_idx || !attempts) return FALSE;

                /* Note the alignment */
                if (r_ptr->flags3 & RF3_EVIL) align.sub_align |= SUB_ALIGN_EVIL;
                if (r_ptr->flags3 & RF3_GOOD) align.sub_align |= SUB_ALIGN_GOOD;

                what[i] = r_idx;
        }

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, 11, 25)) return FALSE;

        /* Large room */
        y1 = yval - 4;
        y2 = yval + 4;
        x1 = xval - 11;
        x2 = xval + 11;

        /* Place the floor area */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                }
        }

        /* Place the outer walls */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2 + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2 + 1][x];
                place_outer_grid(c_ptr);
        }

        /* Advance to the center room */
        y1 = y1 + 2;
        y2 = y2 - 2;
        x1 = x1 + 2;
        x2 = x2 - 2;

        /* The inner walls */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_inner_grid(c_ptr);
                c_ptr = &cave[y][x2 + 1];
                place_inner_grid(c_ptr);
        }
        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_inner_grid(c_ptr);
                c_ptr = &cave[y2 + 1][x];
                place_inner_grid(c_ptr);
        }
        for (y = y1; y <= y2; y++)
        {
                for (x = x1; x <= x2; x++)
                {
                        add_cave_info(y, x, CAVE_ICKY);
                }
        }

        /* Place a secret door */
        switch (randint1(4))
        {
                case 1: place_secret_door(y1 - 1, xval, DOOR_DEFAULT); break;
                case 2: place_secret_door(y2 + 1, xval, DOOR_DEFAULT); break;
                case 3: place_secret_door(yval, x1 - 1, DOOR_DEFAULT); break;
                case 4: place_secret_door(yval, x2 + 1, DOOR_DEFAULT); break;
        }

        /* Sort the entries */
        for (i = 0; i < 16 - 1; i++)
        {
                /* Sort the entries */
                for (j = 0; j < 16 - 1; j++)
                {
                        int i1 = j;
                        int i2 = j + 1;

                        int p1 = r_info[what[i1]].level;
                        int p2 = r_info[what[i2]].level;

                        /* Bubble */
                        if (p1 > p2)
                        {
                                int tmp = what[i1];
                                what[i1] = what[i2];
                                what[i2] = tmp;
                        }
                }
        }

        /* Message */
        if (cheat_room)
        {
                /* Room type */
#ifdef JP
                msg_format("¥â¥ó¥¹¥¿¡¼Éô²°(pit)(%s%s)", n_ptr->name, pit_subtype_string(cur_pit_type, FALSE));
#else
                msg_format("Monster pit (%s%s)", n_ptr->name, pit_subtype_string(cur_pit_type, FALSE));
#endif
        }

        /* Select the entries */
        for (i = 0; i < 8; i++)
        {
                /* Every other entry */
                what[i] = what[i * 2];

                if (cheat_hear)
                {
                        /* Message */
                        msg_print(r_name + r_info[what[i]].name);
                }
        }

        /* Top and bottom rows */
        for (x = xval - 9; x <= xval + 9; x++)
        {
                place_monster_aux(0, yval - 2, x, what[0], PM_NO_KAGE);
                place_monster_aux(0, yval + 2, x, what[0], PM_NO_KAGE);
        }

        /* Middle columns */
        for (y = yval - 1; y <= yval + 1; y++)
        {
                place_monster_aux(0, y, xval - 9, what[0], PM_NO_KAGE);
                place_monster_aux(0, y, xval + 9, what[0], PM_NO_KAGE);

                place_monster_aux(0, y, xval - 8, what[1], PM_NO_KAGE);
                place_monster_aux(0, y, xval + 8, what[1], PM_NO_KAGE);

                place_monster_aux(0, y, xval - 7, what[1], PM_NO_KAGE);
                place_monster_aux(0, y, xval + 7, what[1], PM_NO_KAGE);

                place_monster_aux(0, y, xval - 6, what[2], PM_NO_KAGE);
                place_monster_aux(0, y, xval + 6, what[2], PM_NO_KAGE);

                place_monster_aux(0, y, xval - 5, what[2], PM_NO_KAGE);
                place_monster_aux(0, y, xval + 5, what[2], PM_NO_KAGE);

                place_monster_aux(0, y, xval - 4, what[3], PM_NO_KAGE);
                place_monster_aux(0, y, xval + 4, what[3], PM_NO_KAGE);

                place_monster_aux(0, y, xval - 3, what[3], PM_NO_KAGE);
                place_monster_aux(0, y, xval + 3, what[3], PM_NO_KAGE);

                place_monster_aux(0, y, xval - 2, what[4], PM_NO_KAGE);
                place_monster_aux(0, y, xval + 2, what[4], PM_NO_KAGE);
        }

        /* Above/Below the center monster */
        for (x = xval - 1; x <= xval + 1; x++)
        {
                place_monster_aux(0, yval + 1, x, what[5], PM_NO_KAGE);
                place_monster_aux(0, yval - 1, x, what[5], PM_NO_KAGE);
        }

        /* Next to the center monster */
        place_monster_aux(0, yval, xval + 1, what[6], PM_NO_KAGE);
        place_monster_aux(0, yval, xval - 1, what[6], PM_NO_KAGE);

        /* Center monster */
        place_monster_aux(0, yval, xval, what[7], PM_NO_KAGE);

        return TRUE;
}


/* coordinate translation code */
static void coord_trans(int *x, int *y, int xoffset, int yoffset, int transno)
{
        int i;
        int temp;

        /*
         * transno specifies what transformation is required. (0-7)
         * The lower two bits indicate by how much the vault is rotated,
         * and the upper bit indicates a reflection.
         * This is done by using rotation matrices... however since
         * these are mostly zeros for rotations by 90 degrees this can
         * be expressed simply in terms of swapping and inverting the
         * x and y coordinates.
         */
        for (i = 0; i < transno % 4; i++)
        {
                /* rotate by 90 degrees */
                temp = *x;
                *x = -(*y);
                *y = temp;
        }

        if (transno / 4)
        {
                /* Reflect depending on status of 3rd bit. */
                *x = -(*x);
        }

        /* Add offsets so vault stays in the first quadrant */
        *x += xoffset;
        *y += yoffset;
}


/*
 * Hack -- fill in "vault" rooms
 */
static void build_vault(int yval, int xval, int ymax, int xmax, cptr data,
                int xoffset, int yoffset, int transno)
{
        int dx, dy, x, y, i, j;

        cptr t;

        cave_type *c_ptr;


        /* Place dungeon features and objects */
        for (t = data, dy = 0; dy < ymax; dy++)
        {
                for (dx = 0; dx < xmax; dx++, t++)
                {
                        /* prevent loop counter from being overwritten */
                        i = dx;
                        j = dy;

                        /* Flip / rotate */
                        coord_trans(&i, &j, xoffset, yoffset, transno);

                        /* Extract the location */
                        if (transno % 2 == 0)
                        {
                                /* no swap of x/y */
                                x = xval - (xmax / 2) + i;
                                y = yval - (ymax / 2) + j;
                        }
                        else
                        {
                                /* swap of x/y */
                                x = xval - (ymax / 2) + i;
                                y = yval - (xmax / 2) + j;
                        }

                        /* Hack -- skip "non-grids" */
                        if (*t == ' ') continue;

                        /* Access the grid */
                        c_ptr = &cave[y][x];

                        /* Lay down a floor */
                        place_floor_grid(c_ptr);

                        /* Remove any mimic */
                        c_ptr->mimic = 0;

                        /* Part of a vault */
                        c_ptr->info |= (CAVE_ROOM | CAVE_ICKY);

                        /* Analyze the grid */
                        switch (*t)
                        {
                                /* Granite wall (outer) */
                        case '%':
                                place_outer_noperm_grid(c_ptr);
                                break;

                                /* Granite wall (inner) */
                        case '#':
                                place_inner_grid(c_ptr);
                                break;

                                /* Glass wall (inner) */
                        case '$':
                                place_inner_grid(c_ptr);
                                c_ptr->feat = feat_glass_wall;
                                break;

                                /* Permanent wall (inner) */
                        case 'X':
                                place_inner_perm_grid(c_ptr);
                                break;

                                /* Permanent glass wall (inner) */
                        case 'Y':
                                place_inner_perm_grid(c_ptr);
                                c_ptr->feat = feat_permanent_glass_wall;
                                break;

                                /* Treasure/trap */
                        case '*':
                                if (randint0(100) < 75)
                                {
                                        place_object(y, x, 0L);
                                }
                                else
                                {
                                        place_trap(y, x);
                                }
                                break;

                                /* Secret doors */
                        case '+':
                                place_secret_door(y, x, DOOR_DEFAULT);
                                break;

                                /* Secret glass doors */
                        case '-':
                                place_secret_door(y, x, DOOR_GLASS_DOOR);
                                if (is_closed_door(c_ptr->feat)) c_ptr->mimic = feat_glass_wall;
                                break;

                                /* Curtains */
                        case '\'':
                                place_secret_door(y, x, DOOR_CURTAIN);
                                break;

                                /* Trap */
                        case '^':
                                place_trap(y, x);
                                break;

                                /* Black market in a dungeon */
                        case 'S':
                                set_cave_feat(y, x, feat_black_market);
                                store_init(NO_TOWN, STORE_BLACK);
                                break;

                                /* The Pattern */
                        case 'p':
                                set_cave_feat(y, x, feat_pattern_start);
                                break;

                        case 'a':
                                set_cave_feat(y, x, feat_pattern_1);
                                break;

                        case 'b':
                                set_cave_feat(y, x, feat_pattern_2);
                                break;

                        case 'c':
                                set_cave_feat(y, x, feat_pattern_3);
                                break;

                        case 'd':
                                set_cave_feat(y, x, feat_pattern_4);
                                break;

                        case 'P':
                                set_cave_feat(y, x, feat_pattern_end);
                                break;

                        case 'B':
                                set_cave_feat(y, x, feat_pattern_exit);
                                break;

                        case 'A':
                                /* Reward for Pattern walk */
                                object_level = base_level + 12;
                                place_object(y, x, AM_GOOD | AM_GREAT);
                                object_level = base_level;
                                break;
                        }
                }
        }


        /* Place dungeon monsters and objects */
        for (t = data, dy = 0; dy < ymax; dy++)
        {
                for (dx = 0; dx < xmax; dx++, t++)
                {
                        /* prevent loop counter from being overwritten */
                        i = dx;
                        j = dy;

                        /* Flip / rotate */
                        coord_trans(&i, &j, xoffset, yoffset, transno);

                        /* Extract the location */
                        if (transno % 2 == 0)
                        {
                                /* no swap of x/y */
                                x = xval - (xmax / 2) + i;
                                y = yval - (ymax / 2) + j;
                        }
                        else
                        {
                                /* swap of x/y */
                                x = xval - (ymax / 2) + i;
                                y = yval - (xmax / 2) + j;
                        }

                        /* Hack -- skip "non-grids" */
                        if (*t == ' ') continue;

                        /* Analyze the symbol */
                        switch (*t)
                        {
                                /* Monster */
                                case '&':
                                {
                                        monster_level = base_level + 5;
                                        place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
                                        monster_level = base_level;
                                        break;
                                }

                                /* Meaner monster */
                                case '@':
                                {
                                        monster_level = base_level + 11;
                                        place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
                                        monster_level = base_level;
                                        break;
                                }

                                /* Meaner monster, plus treasure */
                                case '9':
                                {
                                        monster_level = base_level + 9;
                                        place_monster(y, x, PM_ALLOW_SLEEP);
                                        monster_level = base_level;
                                        object_level = base_level + 7;
                                        place_object(y, x, AM_GOOD);
                                        object_level = base_level;
                                        break;
                                }

                                /* Nasty monster and treasure */
                                case '8':
                                {
                                        monster_level = base_level + 40;
                                        place_monster(y, x, PM_ALLOW_SLEEP);
                                        monster_level = base_level;
                                        object_level = base_level + 20;
                                        place_object(y, x, AM_GOOD | AM_GREAT);
                                        object_level = base_level;
                                        break;
                                }

                                /* Monster and/or object */
                                case ',':
                                {
                                        if (randint0(100) < 50)
                                        {
                                                monster_level = base_level + 3;
                                                place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
                                                monster_level = base_level;
                                        }
                                        if (randint0(100) < 50)
                                        {
                                                object_level = base_level + 7;
                                                place_object(y, x, 0L);
                                                object_level = base_level;
                                        }
                                        break;
                                }

                        }
                }
        }
}


/*
 * Type 7 -- simple vaults (see "v_info.txt")
 */
static bool build_type7(void)
{
        vault_type *v_ptr;
        int dummy;
        int x, y;
        int xval, yval;
        int xoffset, yoffset;
        int transno;

        /* Pick a lesser vault */
        for (dummy = 0; dummy < SAFE_MAX_ATTEMPTS; dummy++)
        {
                /* Access a random vault record */
                v_ptr = &v_info[randint0(max_v_idx)];

                /* Accept the first lesser vault */
                if (v_ptr->typ == 7) break;
        }

        /* No lesser vault found */
        if (dummy >= SAFE_MAX_ATTEMPTS)
        {
                if (cheat_room)
                {
#ifdef JP
                        msg_print("·Ù¹ð¡ª¾®¤µ¤ÊÃϲ¼¼¼¤òÇÛÃ֤Ǥ­¤Þ¤»¤ó¡ª");
#else
                        msg_print("Warning! Could not place lesser vault!");
#endif
                }
                return FALSE;
        }

        /* pick type of transformation (0-7) */
        transno = randint0(8);

        /* calculate offsets */
        x = v_ptr->wid;
        y = v_ptr->hgt;

        /* Some huge vault cannot be ratated to fit in the dungeon */
        if (x+2 > cur_hgt-2)
        {
                /* Forbid 90 or 270 degree ratation */
                transno &= ~1;
        }

        coord_trans(&x, &y, 0, 0, transno);

        if (x < 0)
        {
                xoffset = -x - 1;
        }
        else
        {
                xoffset = 0;
        }

        if (y < 0)
        {
                yoffset = -y - 1;
        }
        else
        {
                yoffset = 0;
        }

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, abs(y), abs(x))) return FALSE;

#ifdef FORCE_V_IDX
        v_ptr = &v_info[2];
#endif

        /* Message */
#ifdef JP
        if (cheat_room) msg_format("¾®¤µ¤ÊÃϲ¼¼¼(%s)", v_name + v_ptr->name);
#else
        if (cheat_room) msg_format("Lesser vault (%s)", v_name + v_ptr->name);
#endif

        /* Hack -- Build the vault */
        build_vault(yval, xval, v_ptr->hgt, v_ptr->wid,
                    v_text + v_ptr->text, xoffset, yoffset, transno);

        return TRUE;
}


/*
 * Type 8 -- greater vaults (see "v_info.txt")
 */
static bool build_type8(void)
{
        vault_type *v_ptr;
        int dummy;
        int xval, yval;
        int x, y;
        int transno;
        int xoffset, yoffset;

        /* Pick a greater vault */
        for (dummy = 0; dummy < SAFE_MAX_ATTEMPTS; dummy++)
        {
                /* Access a random vault record */
                v_ptr = &v_info[randint0(max_v_idx)];

                /* Accept the first greater vault */
                if (v_ptr->typ == 8) break;
        }

        /* No greater vault found */
        if (dummy >= SAFE_MAX_ATTEMPTS)
        {
                if (cheat_room)
                {
#ifdef JP
                        msg_print("·Ù¹ð¡ªµðÂç¤ÊÃϲ¼¼¼¤òÇÛÃ֤Ǥ­¤Þ¤»¤ó¡ª");
#else
                        msg_print("Warning! Could not place greater vault!");
#endif
                }
                return FALSE;
        }

        /* pick type of transformation (0-7) */
        transno = randint0(8);

        /* calculate offsets */
        x = v_ptr->wid;
        y = v_ptr->hgt;

        /* Some huge vault cannot be ratated to fit in the dungeon */
        if (x+2 > cur_hgt-2)
        {
                /* Forbid 90 or 270 degree ratation */
                transno &= ~1;
        }

        coord_trans(&x, &y, 0, 0, transno);

        if (x < 0)
        {
                xoffset = - x - 1;
        }
        else
        {
                xoffset = 0;
        }

        if (y < 0)
        {
                yoffset = - y - 1;
        }
        else
        {
                yoffset = 0;
        }

        /*
         * Try to allocate space for room.  If fails, exit
         *
         * Hack -- Prepare a bit larger space (+2, +2) to 
         * prevent generation of vaults with no-entrance.
         */
        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, abs(y) + 2, abs(x) + 2)) return FALSE;

#ifdef FORCE_V_IDX
        v_ptr = &v_info[76 + randint1(3)];
#endif

        /* Message */
#ifdef JP
        if (cheat_room) msg_format("µðÂç¤ÊÃϲ¼¼¼(%s)", v_name + v_ptr->name);
#else
        if (cheat_room) msg_format("Greater vault (%s)", v_name + v_ptr->name);
#endif

        /* Hack -- Build the vault */
        build_vault(yval, xval, v_ptr->hgt, v_ptr->wid,
                    v_text + v_ptr->text, xoffset, yoffset, transno);

        return TRUE;
}

/*
 * Structure to hold all "fill" data
 */

typedef struct fill_data_type fill_data_type;

struct fill_data_type
{
        /* area size */
        int xmin;
        int ymin;
        int xmax;
        int ymax;

        /* cutoffs */
        int c1;
        int c2;
        int c3;

        /* features to fill with */
        int feat1;
        int feat2;
        int feat3;

        int info1;
        int info2;
        int info3;

        /* number of filled squares */
        int amount;
};

static fill_data_type fill_data;


/* Store routine for the fractal cave generator */
/* this routine probably should be an inline function or a macro. */
static void store_height(int x, int y, int val)
{
        /* if on boundary set val > cutoff so walls are not as square */
        if (((x == fill_data.xmin) || (y == fill_data.ymin) ||
             (x == fill_data.xmax) || (y == fill_data.ymax)) &&
            (val <= fill_data.c1)) val = fill_data.c1 + 1;

        /* store the value in height-map format */
        cave[y][x].feat = val;

        return;
}


/*
* Explanation of the plasma fractal algorithm:
*
* A grid of points is created with the properties of a 'height-map'
* This is done by making the corners of the grid have a random value.
* The grid is then subdivided into one with twice the resolution.
* The new points midway between two 'known' points can be calculated
* by taking the average value of the 'known' ones and randomly adding
* or subtracting an amount proportional to the distance between those
* points.  The final 'middle' points of the grid are then calculated
* by averaging all four of the originally 'known' corner points.  An
* random amount is added or subtracted from this to get a value of the
* height at that point.  The scaling factor here is adjusted to the
* slightly larger distance diagonally as compared to orthogonally.
*
* This is then repeated recursively to fill an entire 'height-map'
* A rectangular map is done the same way, except there are different
* scaling factors along the x and y directions.
*
* A hack to change the amount of correlation between points is done using
* the grd variable.  If the current step size is greater than grd then
* the point will be random, otherwise it will be calculated by the
* above algorithm.  This makes a maximum distance at which two points on
* the height map can affect each other.
*
* How fractal caves are made:
*
* When the map is complete, a cut-off value is used to create a cave.
* Heights below this value are "floor", and heights above are "wall".
* This also can be used to create lakes, by adding more height levels
* representing shallow and deep water/ lava etc.
*
* The grd variable affects the width of passages.
* The roug variable affects the roughness of those passages
*
* The tricky part is making sure the created cave is connected.  This
* is done by 'filling' from the inside and only keeping the 'filled'
* floor.  Walls bounding the 'filled' floor are also kept.  Everything
* else is converted to the normal _extra_.
 */


/*
 *  Note that this uses the cave.feat array in a very hackish way
 *  the values are first set to zero, and then each array location
 *  is used as a "heightmap"
 *  The heightmap then needs to be converted back into the "feat" format.
 *
 *  grd=level at which fractal turns on.  smaller gives more mazelike caves
 *  roug=roughness level.  16=normal.  higher values make things more convoluted
 *    small values are good for smooth walls.
 *  size=length of the side of the square cave system.
 */
static void generate_hmap(int y0, int x0, int xsiz, int ysiz, int grd, int roug, int cutoff)
{
        int xhsize, yhsize, xsize, ysize, maxsize;

        /*
         * fixed point variables- these are stored as 256 x normal value
         * this gives 8 binary places of fractional part + 8 places of normal part
         */

        u16b xstep, xhstep, ystep, yhstep;
        u16b xstep2, xhstep2, ystep2, yhstep2;
        u16b i, j, ii, jj, diagsize, xxsize, yysize;
        
        /* Cache for speed */
        u16b xm, xp, ym, yp;

        /* redefine size so can change the value if out of range */
        xsize = xsiz;
        ysize = ysiz;

        /* Paranoia about size of the system of caves */
        if (xsize > 254) xsize = 254;
        if (xsize < 4) xsize = 4;
        if (ysize > 254) ysize = 254;
        if (ysize < 4) ysize = 4;

        /* get offsets to middle of array */
        xhsize = xsize / 2;
        yhsize = ysize / 2;

        /* fix rounding problem */
        xsize = xhsize * 2;
        ysize = yhsize * 2;

        /* get limits of region */
        fill_data.xmin = x0 - xhsize;
        fill_data.ymin = y0 - yhsize;
        fill_data.xmax = x0 + xhsize;
        fill_data.ymax = y0 + yhsize;

        /* Store cutoff in global for quick access */
        fill_data.c1 = cutoff;

        /*
        * Scale factor for middle points:
        * About sqrt(2) * 256 - correct for a square lattice
        * approximately correct for everything else.
         */
        diagsize = 362;

        /* maximum of xsize and ysize */
        maxsize = (xsize > ysize) ? xsize : ysize;

        /* Clear the section */
        for (i = 0; i <= xsize; i++)
        {
                for (j = 0; j <= ysize; j++)
                {
                        /* -1 is a flag for "not done yet" */
                        cave[(int)(fill_data.ymin + j)][(int)(fill_data.xmin + i)].feat = -1;
                        /* Clear icky flag because may be redoing the cave */
                        cave[(int)(fill_data.ymin + j)][(int)(fill_data.xmin + i)].info &= ~(CAVE_ICKY);
                }
        }

        /* Boundaries are walls */
        cave[fill_data.ymin][fill_data.xmin].feat = maxsize;
        cave[fill_data.ymax][fill_data.xmin].feat = maxsize;
        cave[fill_data.ymin][fill_data.xmax].feat = maxsize;
        cave[fill_data.ymax][fill_data.xmax].feat = maxsize;

        /* Set the middle square to be an open area. */
        cave[y0][x0].feat = 0;

        /* Initialize the step sizes */
        xstep = xhstep = xsize * 256;
        ystep = yhstep = ysize * 256;
        xxsize = xsize * 256;
        yysize = ysize * 256;

        /*
         * Fill in the rectangle with fractal height data -
         * like the 'plasma fractal' in fractint.
         */
        while ((xhstep > 256) || (yhstep > 256))
        {
                /* Halve the step sizes */
                xstep = xhstep;
                xhstep /= 2;
                ystep = yhstep;
                yhstep /= 2;

                /* cache well used values */
                xstep2 = xstep / 256;
                ystep2 = ystep / 256;

                xhstep2 = xhstep / 256;
                yhstep2 = yhstep / 256;

                /* middle top to bottom. */
                for (i = xhstep; i <= xxsize - xhstep; i += xstep)
                {
                        for (j = 0; j <= yysize; j += ystep)
                        {
                                /* cache often used values */
                                ii = i / 256 + fill_data.xmin;
                                jj = j / 256 + fill_data.ymin;

                                /* Test square */
                                if (cave[jj][ii].feat == -1)
                                {
                                        if (xhstep2 > grd)
                                        {
                                                /* If greater than 'grid' level then is random */
                                                store_height(ii, jj, randint1(maxsize));
                                        }
                                        else
                                        {
                                                /* Average of left and right points +random bit */
                                                store_height(ii, jj,
                                                        (cave[jj][fill_data.xmin + (i - xhstep) / 256].feat
                                                         + cave[jj][fill_data.xmin + (i + xhstep) / 256].feat) / 2
                                                         + (randint1(xstep2) - xhstep2) * roug / 16);
                                        }
                                }
                        }
                }


                /* middle left to right. */
                for (j = yhstep; j <= yysize - yhstep; j += ystep)
                {
                        for (i = 0; i <= xxsize; i += xstep)
                        {
                                /* cache often used values */
                                ii = i / 256 + fill_data.xmin;
                                jj = j / 256 + fill_data.ymin;

                                /* Test square */
                                if (cave[jj][ii].feat == -1)
                                {
                                        if (xhstep2 > grd)
                                        {
                                                /* If greater than 'grid' level then is random */
                                                store_height(ii, jj, randint1(maxsize));
                                        }
                                        else
                                        {
                                                /* Average of up and down points +random bit */
                                                store_height(ii, jj,
                                                        (cave[fill_data.ymin + (j - yhstep) / 256][ii].feat
                                                        + cave[fill_data.ymin + (j + yhstep) / 256][ii].feat) / 2
                                                        + (randint1(ystep2) - yhstep2) * roug / 16);
                                        }
                                }
                        }
                }

                /* center. */
                for (i = xhstep; i <= xxsize - xhstep; i += xstep)
                {
                        for (j = yhstep; j <= yysize - yhstep; j += ystep)
                        {
                                /* cache often used values */
                                ii = i / 256 + fill_data.xmin;
                                jj = j / 256 + fill_data.ymin;

                                /* Test square */
                                if (cave[jj][ii].feat == -1)
                                {
                                        if (xhstep2 > grd)
                                        {
                                                /* If greater than 'grid' level then is random */
                                                store_height(ii, jj, randint1(maxsize));
                                        }
                                        else
                                        {
                                                /* Cache reused values. */
                                                xm = fill_data.xmin + (i - xhstep) / 256;
                                                xp = fill_data.xmin + (i + xhstep) / 256;
                                                ym = fill_data.ymin + (j - yhstep) / 256;
                                                yp = fill_data.ymin + (j + yhstep) / 256;

                                                /* 
                                                 * Average over all four corners + scale by diagsize to
                                                 * reduce the effect of the square grid on the shape of the fractal
                                                 */
                                                store_height(ii, jj,
                                                        (cave[ym][xm].feat + cave[yp][xm].feat
                                                        + cave[ym][xp].feat + cave[yp][xp].feat) / 4
                                                        + (randint1(xstep2) - xhstep2) * (diagsize / 16) / 256 * roug);
                                        }
                                }
                        }
                }
        }
}


static bool hack_isnt_wall(int y, int x, int c1, int c2, int c3, int feat1, int feat2, int feat3, int info1, int info2, int info3)
{
        /*
         * function used to convert from height-map back to the
         *  normal angband cave format
         */
        if (cave[y][x].info & CAVE_ICKY)
        {
                /* already done */
                return FALSE;
        }
        else
        {
                /* Show that have looked at this square */
                cave[y][x].info|= (CAVE_ICKY);

                /* Use cutoffs c1-c3 to allocate regions of floor /water/ lava etc. */
                if (cave[y][x].feat <= c1)
                {
                        /* 25% of the time use the other tile : it looks better this way */
                        if (randint1(100) < 75)
                        {
                                cave[y][x].feat = feat1;
                                cave[y][x].info &= ~(CAVE_MASK);
                                cave[y][x].info |= info1;
                                return TRUE;
                        }
                        else
                        {
                                cave[y][x].feat = feat2;
                                cave[y][x].info &= ~(CAVE_MASK);
                                cave[y][x].info |= info2;
                                return TRUE;
                        }
                }
                else if (cave[y][x].feat <= c2)
                {
                        /* 25% of the time use the other tile : it looks better this way */
                        if (randint1(100) < 75)
                        {
                                cave[y][x].feat = feat2;
                                cave[y][x].info &= ~(CAVE_MASK);
                                cave[y][x].info |= info2;
                                return TRUE;
                        }
                        else
                        {
                                cave[y][x].feat = feat1;
                                cave[y][x].info &= ~(CAVE_MASK);
                                cave[y][x].info |= info1;
                                return TRUE;
                        }
                }
                else if (cave[y][x].feat <= c3)
                {
                        cave[y][x].feat = feat3;
                        cave[y][x].info &= ~(CAVE_MASK);
                        cave[y][x].info |= info3;
                        return TRUE;
                }
                /* if greater than cutoff then is a wall */
                else
                {
                        place_outer_bold(y, x);
                        return FALSE;
                }
        }
}




/*
 * Quick and nasty fill routine used to find the connected region
 * of floor in the middle of the cave
 */
static void cave_fill(byte y, byte x)
{
        int i, j, d;
        int ty, tx;

        int flow_tail = 1;
        int flow_head = 0;


        /*** Start Grid ***/

        /* Enqueue that entry */
        temp_y[0] = y;
        temp_x[0] = x;


        /* Now process the queue */
        while (flow_head != flow_tail)
        {
                /* Extract the next entry */
                ty = temp_y[flow_head];
                tx = temp_x[flow_head];

                /* Forget that entry */
                if (++flow_head == TEMP_MAX) flow_head = 0;

                /* Add the "children" */
                for (d = 0; d < 8; d++)
                {
                        int old_head = flow_tail;

                        /* Child location */
                        j = ty + ddy_ddd[d];
                        i = tx + ddx_ddd[d];

                        /* Paranoia Don't leave the cave */
                        if (!in_bounds(j, i))
                        {
                                /* affect boundary */
                                cave[j][i].info |= CAVE_ICKY;
/*                              return; */
                        }

                        /* If within bounds */
                        else if ((i > fill_data.xmin) && (i < fill_data.xmax)
                                && (j > fill_data.ymin) && (j < fill_data.ymax))
                        {
                                /* If not a wall or floor done before */
                                if (hack_isnt_wall(j, i,
                                        fill_data.c1, fill_data.c2, fill_data.c3,
                                        fill_data.feat1, fill_data.feat2, fill_data.feat3,
                                        fill_data.info1, fill_data.info2, fill_data.info3))
                                {
                                        /* Enqueue that entry */
                                        temp_y[flow_tail] = j;
                                        temp_x[flow_tail] = i;

                                        /* Advance the queue */
                                        if (++flow_tail == TEMP_MAX) flow_tail = 0;

                                        /* Hack -- Overflow by forgetting new entry */
                                        if (flow_tail == flow_head)
                                        {
                                                flow_tail = old_head;
                                        }
                                        else
                                        {
                                                /* keep tally of size of cave system */
                                                (fill_data.amount)++;
                                        }
                                }
                        }
                        else
                        {
                                /* affect boundary */
                                cave[j][i].info |= CAVE_ICKY;
                        }
                }
        }
}


static bool generate_fracave(int y0, int x0, int xsize, int ysize, int cutoff, bool light, bool room)
{
        int x, y, i, xhsize, yhsize;

        /* offsets to middle from corner */
        xhsize = xsize / 2;
        yhsize = ysize / 2;


        /*
         * select region connected to center of cave system
         * this gets rid of alot of isolated one-sqaures that
         * can make teleport traps instadeaths...
         */

        /* cutoffs */
        fill_data.c1 = cutoff;
        fill_data.c2 = 0;
        fill_data.c3 = 0;

        /* features to fill with */
        fill_data.feat1 = floor_type[randint0(100)];
        fill_data.feat2 = floor_type[randint0(100)];
        fill_data.feat3 = floor_type[randint0(100)];

        fill_data.info1 = CAVE_FLOOR;
        fill_data.info2 = CAVE_FLOOR;
        fill_data.info3 = CAVE_FLOOR;

        /* number of filled squares */
        fill_data.amount = 0;

        cave_fill((byte)y0, (byte)x0);

        /* if tally too small, try again */
        if (fill_data.amount < 10)
        {
                /* too small - clear area and try again later */
                for (x = 0; x <= xsize; ++x)
                {
                        for (y = 0; y <= ysize; ++y)
                        {
                                place_extra_bold(y0 + y - yhsize, x0 + x - xhsize);
                                cave[y0 + y - yhsize][x0 + x - xhsize].info &= ~(CAVE_ICKY | CAVE_ROOM);
                        }
                }
                return FALSE;
        }

        /*
         * Do boundarys-check to see if they are next to a filled region
         * If not then they are set to normal granite
         * If so then they are marked as room walls.
         */
        for (i = 0; i <= xsize; ++i)
        {
                /* top boundary */
                if ((cave[0 + y0 - yhsize][i + x0 - xhsize].info & CAVE_ICKY) && (room))
                {
                        /* Next to a 'filled' region? - set to be room walls */
                        place_outer_bold(y0 + 0 - yhsize, x0 + i - xhsize);
                        if (light) cave[y0 + 0 - yhsize][x0 + i - xhsize].info |= (CAVE_GLOW);
                        cave[y0 + 0 - yhsize][x0 + i - xhsize].info |= (CAVE_ROOM);
                        place_outer_bold(y0 + 0 - yhsize, x0 + i - xhsize);
                }
                else
                {
                        /* set to be normal granite */
                        place_extra_bold(y0 + 0 - yhsize, x0 + i - xhsize);
                }

                /* bottom boundary */
                if ((cave[ysize + y0 - yhsize][i + x0 - xhsize].info & CAVE_ICKY) && (room))
                {
                        /* Next to a 'filled' region? - set to be room walls */
                        place_outer_bold(y0 + ysize - yhsize, x0 + i - xhsize);
                        if (light) cave[y0 + ysize - yhsize][x0 + i - xhsize].info|=(CAVE_GLOW);
                        cave[y0 + ysize - yhsize][x0 + i - xhsize].info|=(CAVE_ROOM);
                        place_outer_bold(y0 + ysize - yhsize, x0 + i - xhsize);
                }
                else
                {
                        /* set to be normal granite */
                        place_extra_bold(y0 + ysize - yhsize, x0 + i - xhsize);
                }

                /* clear the icky flag-don't need it any more */
                cave[y0 + 0 - yhsize][x0 + i - xhsize].info &= ~(CAVE_ICKY);
                cave[y0 + ysize - yhsize][x0 + i - xhsize].info &= ~(CAVE_ICKY);
        }

        /* Do the left and right boundaries minus the corners (done above) */
        for (i = 1; i < ysize; ++i)
        {
                /* left boundary */
                if ((cave[i + y0 - yhsize][0 + x0 - xhsize].info & CAVE_ICKY) && room)
                {
                        /* room boundary */
                        place_outer_bold(y0 + i - yhsize, x0 + 0 - xhsize);
                        if (light) cave[y0 + i - yhsize][x0 + 0 - xhsize].info |= (CAVE_GLOW);
                        cave[y0 + i - yhsize][x0 + 0 - xhsize].info |= (CAVE_ROOM);
                        place_outer_bold(y0 + i - yhsize, x0 + 0 - xhsize);
                }
                else
                {
                        /* outside room */
                        place_extra_bold(y0 + i - yhsize, x0 + 0 - xhsize);
                }
                /* right boundary */
                if ((cave[i + y0 - yhsize][xsize + x0 - xhsize].info & CAVE_ICKY) && room)
                {
                        /* room boundary */
                        place_outer_bold(y0 + i - yhsize, x0 + xsize - xhsize);
                        if (light) cave[y0 + i - yhsize][x0 + xsize - xhsize].info |= (CAVE_GLOW);
                        cave[y0 + i - yhsize][x0 + xsize - xhsize].info |= (CAVE_ROOM);
                        place_outer_bold(y0 + i - yhsize, x0 + xsize - xhsize);
                }
                else
                {
                        /* outside room */
                        place_extra_bold(y0 + i - yhsize, x0 + xsize - xhsize);
                }

                /* clear icky flag -done with it */
                cave[y0 + i - yhsize][x0 + 0 - xhsize].info &= ~(CAVE_ICKY);
                cave[y0 + i - yhsize][x0 + xsize - xhsize].info &= ~(CAVE_ICKY);
        }


        /* Do the rest: convert back to the normal format */
        for (x = 1; x < xsize; ++x)
        {
                for (y = 1; y < ysize; ++y)
                {
                        if (is_floor_bold(y0 + y - yhsize, x0 + x - xhsize) &&
                            (cave[y0 + y - yhsize][x0 + x - xhsize].info & CAVE_ICKY))
                        {
                                /* Clear the icky flag in the filled region */
                                cave[y0 + y - yhsize][x0 + x - xhsize].info &= ~CAVE_ICKY;

                                /* Set appropriate flags */
                                if (light) cave[y0 + y - yhsize][x0 + x - xhsize].info |= (CAVE_GLOW);
                                if (room) cave[y0 + y - yhsize][x0 + x - xhsize].info |= (CAVE_ROOM);
                        }
                        else if (is_outer_bold(y0 + y - yhsize, x0 + x - xhsize) &&
                                 (cave[y0 + y - yhsize][x0 + x - xhsize].info & CAVE_ICKY))
                        {
                                /* Walls */
                                cave[y0 + y - yhsize][x0 + x - xhsize].info &= ~(CAVE_ICKY);
                                if (light) cave[y0 + y - yhsize][x0 + x - xhsize].info |= (CAVE_GLOW);
                                if (room)
                                {
                                        cave[y0 + y - yhsize][x0 + x - xhsize].info |= (CAVE_ROOM);
                                }
                                else
                                {

                                        place_extra_bold(y0 + y - yhsize, x0 + x - xhsize);
                                        cave[y0 + y - yhsize][x0 + x - xhsize].info &= ~(CAVE_ROOM);
                                }
                        }
                        else
                        {
                                /* Clear the unconnected regions */
                                place_extra_bold(y0 + y - yhsize, x0 + x - xhsize);
                                cave[y0 + y - yhsize][x0 + x - xhsize].info &= ~(CAVE_ICKY | CAVE_ROOM);
                        }
                }
        }

        /*
         * XXX XXX XXX There is a slight problem when tunnels pierce the caves:
         * Extra doors appear inside the system.  (Its not very noticeable though.)
         * This can be removed by "filling" from the outside in.  This allows a separation
         * from _outer_ with _inner_.  (Internal walls are  _outer_ instead.)
         * The extra effort for what seems to be only a minor thing (even non-existant if you
         * think of the caves not as normal rooms, but as holes in the dungeon), doesn't seem
         * worth it.
         */

        return TRUE;
}


/*
 * Driver routine to create fractal cave system
 */
static bool build_type9(void)
{
        int grd, roug, cutoff, xsize, ysize, y0, x0;

        bool done, light, room;

        /* get size: note 'Evenness'*/
        xsize = randint1(22) * 2 + 6;
        ysize = randint1(15) * 2 + 6;

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&y0, &x0, ysize + 1, xsize + 1))
        {
                /* Limit to the minimum room size, and retry */
                xsize = 8;
                ysize = 8;

                /* Find and reserve some space in the dungeon.  Get center of room. */
                if (!find_space(&y0, &x0, ysize + 1, xsize + 1))
                {
                        /*
                         * Still no space?!
                         * Try normal room
                         */
                        return build_type1();
                }
        }

        light = done = FALSE;
        room = TRUE;

        if ((dun_level <= randint1(25)) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS)) light = TRUE;

        while (!done)
        {
                /* Note: size must be even or there are rounding problems
                * This causes the tunnels not to connect properly to the room */

                /* testing values for these parameters feel free to adjust */
                grd = 1 << (randint0(4));

                /* want average of about 16 */
                roug = randint1(8) * randint1(4);

                /* about size/2 */
                cutoff = randint1(xsize / 4) + randint1(ysize / 4) +
                         randint1(xsize / 4) + randint1(ysize / 4);

                /* make it */
                generate_hmap(y0, x0, xsize, ysize, grd, roug, cutoff);

                /* Convert to normal format + clean up */
                done = generate_fracave(y0, x0, xsize, ysize, cutoff, light, room);
        }

        return TRUE;
}

#ifdef ALLOW_CAVERNS_AND_LAKES
/*
 * Builds a cave system in the center of the dungeon.
 */
void build_cavern(void)
{
        int grd, roug, cutoff, xsize, ysize, x0, y0;
        bool done, light;

        light = done = FALSE;
        if ((dun_level <= randint1(50)) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS)) light = TRUE;

        /* Make a cave the size of the dungeon */
        xsize = cur_wid - 1;
        ysize = cur_hgt - 1;
        x0 = xsize / 2;
        y0 = ysize / 2;

        /* Paranoia: make size even */
        xsize = x0 * 2;
        ysize = y0 * 2;

        while (!done)
        {
                /* testing values for these parameters: feel free to adjust */
                grd = randint1(4) + 4;

                /* want average of about 16 */
                roug = randint1(8) * randint1(4);

                /* about size/2 */
                cutoff = xsize / 2;

                 /* make it */
                generate_hmap(y0 + 1, x0 + 1, xsize, ysize, grd, roug, cutoff);

                /* Convert to normal format+ clean up */
                done = generate_fracave(y0 + 1, x0 + 1, xsize, ysize, cutoff, light, FALSE);
        }
}

static bool generate_lake(int y0, int x0, int xsize, int ysize, int c1, int c2, int c3, int type)
{
        int x, y, i, xhsize, yhsize;
        int feat1, feat2, feat3;

        /* offsets to middle from corner */
        xhsize = xsize / 2;
        yhsize = ysize / 2;

        /* Get features based on type */
        switch (type)
        {
        case LAKE_T_LAVA: /* Lava */
                feat1 = feat_deep_lava;
                feat2 = feat_shallow_lava;
                feat3 = floor_type[randint0(100)];
                break;
        case LAKE_T_WATER: /* Water */
                feat1 = feat_deep_water;
                feat2 = feat_shallow_water;
                feat3 = floor_type[randint0(100)];
                break;
        case LAKE_T_CAVE: /* Collapsed cave */
                feat1 = floor_type[randint0(100)];
                feat2 = floor_type[randint0(100)];
                feat3 = feat_rubble;
                break;
        case LAKE_T_EARTH_VAULT: /* Earth vault */
                feat1 = feat_rubble;
                feat2 = floor_type[randint0(100)];
                feat3 = feat_rubble;
                break;
        case LAKE_T_AIR_VAULT: /* Air vault */
                feat1 = feat_grass;
                feat2 = feat_tree;
                feat3 = feat_grass;
                break;
        case LAKE_T_WATER_VAULT: /* Water vault */
                feat1 = feat_shallow_water;
                feat2 = feat_deep_water;
                feat3 = feat_shallow_water;
                break;
        case LAKE_T_FIRE_VAULT: /* Fire Vault */
                feat1 = feat_shallow_lava;
                feat2 = feat_deep_lava;
                feat3 = feat_shallow_lava;
                break;

        /* Paranoia */
        default: return FALSE;
        }

        /*
         * select region connected to center of cave system
         * this gets rid of alot of isolated one-sqaures that
         * can make teleport traps instadeaths...
         */

        /* cutoffs */
        fill_data.c1 = c1;
        fill_data.c2 = c2;
        fill_data.c3 = c3;

        /* features to fill with */
        fill_data.feat1 = feat1;
        fill_data.feat2 = feat2;
        fill_data.feat3 = feat3;

        fill_data.info1 = 0;
        fill_data.info2 = 0;
        fill_data.info3 = 0;

        /* number of filled squares */
        fill_data.amount = 0;

        /* select region connected to center of cave system
        * this gets rid of alot of isolated one-sqaures that
        * can make teleport traps instadeaths... */
        cave_fill((byte)y0, (byte)x0);

        /* if tally too small, try again */
        if (fill_data.amount < 10)
        {
                /* too small -clear area and try again later */
                for (x = 0; x <= xsize; ++x)
                {
                        for (y = 0; y <= ysize; ++y)
                        {
                                place_floor_bold(y0 + y - yhsize, x0 + x - xhsize);
                                cave[y0 + y - yhsize][x0 + x - xhsize].info &= ~(CAVE_ICKY);
                        }
                }
                return FALSE;
        }

        /* Do boundarys- set to normal granite */
        for (i = 0; i <= xsize; ++i)
        {
                place_extra_bold(y0 + 0 - yhsize, x0 + i - xhsize);
                place_extra_bold(y0 + ysize - yhsize, x0 + i - xhsize);

                /* clear the icky flag-don't need it any more */
                cave[y0 + 0 - yhsize][x0 + i - xhsize].info &= ~(CAVE_ICKY);
                cave[y0 + ysize - yhsize][x0 + i - xhsize].info &= ~(CAVE_ICKY);
        }

        /* Do the left and right boundaries minus the corners (done above) */

        for (i = 1; i < ysize; ++i)
        {
                place_extra_bold(y0 + i - yhsize, x0 + 0 - xhsize);
                place_extra_bold(y0 + i - yhsize, x0 + xsize - xhsize);

                /* clear icky flag -done with it */
                cave[y0 + i - yhsize][x0 + 0 - xhsize].info &= ~(CAVE_ICKY);
                cave[y0 + i - yhsize][x0 + xsize - xhsize].info &= ~(CAVE_ICKY);
        }


        /* Do the rest: convert back to the normal format */
        for (x = 1; x < xsize; ++x)
        {
                for (y = 1; y < ysize; ++y)
                {
                        /* Fill unconnected regions with granite */
                        if ((!(cave[y0 + y - yhsize][x0 + x - xhsize].info & CAVE_ICKY)) ||
                                is_outer_bold(y0 + y - yhsize, x0 + x - xhsize))
                                place_extra_bold(y0 + y - yhsize, x0 + x - xhsize);

                        /* turn off icky flag (no longer needed.) */
                        cave[y0 + y - yhsize][x0 + x - xhsize].info &= ~(CAVE_ICKY | CAVE_ROOM);

                        /* Light lava */
                        if (cave_have_flag_bold(y0 + y - yhsize, x0 + x - xhsize, FF_LAVA))
                        {
                                if (!(d_info[dungeon_type].flags1 & DF1_DARKNESS)) cave[y0 + y - yhsize][x0 + x - xhsize].info |= CAVE_GLOW;
                        }
                }
        }

        return TRUE;
}


/*
 * makes a lake/collapsed cave system in the center of the dungeon
 */
void build_lake(int type)
{
        int grd, roug, xsize, ysize, x0, y0;
        bool done = FALSE;
        int c1, c2, c3;

        /* paranoia - exit if lake type out of range. */
        if ((type < LAKE_T_LAVA) || (type > LAKE_T_FIRE_VAULT))
        {
                msg_format("Invalid lake type (%d)", type);
                return;
        }

        /* Make the size of the dungeon */
        xsize = cur_wid - 1;
        ysize = cur_hgt - 1;
        x0 = xsize / 2;
        y0 = ysize / 2;

        /* Paranoia: make size even */
        xsize = x0 * 2;
        ysize = y0 * 2;

        while (!done)
        {
                /* testing values for these parameters: feel free to adjust */
                grd = randint1(3) + 4;

                /* want average of about 16 */
                roug = randint1(8) * randint1(4);

                /* Make up size of various componants */
                /* Floor */
                c3 = 3 * xsize / 4;

                /* Deep water/lava */
                c1 = randint0(c3 / 2) + randint0(c3 / 2) - 5;

                /* Shallow boundary */
                c2 = (c1 + c3) / 2;

                /* make it */
                generate_hmap(y0 + 1, x0 + 1, xsize, ysize, grd, roug, c3);

                /* Convert to normal format+ clean up */
                done = generate_lake(y0 + 1, x0 + 1, xsize, ysize, c1, c2, c3, type);
        }
}
#endif /* ALLOW_CAVERNS_AND_LAKES */


/*
 * Routine used by the random vault creators to add a door to a location
 * Note that range checking has to be done in the calling routine.
 *
 * The doors must be INSIDE the allocated region.
 */
static void add_door(int x, int y)
{
        /* Need to have a wall in the center square */
        if (!is_outer_bold(y, x)) return;

        /* look at:
         *  x#x
         *  .#.
         *  x#x
         *
         *  where x=don't care
         *  .=floor, #=wall
         */

        if (is_floor_bold(y-1,x) && is_floor_bold(y+1,x) &&
            (is_outer_bold(y, x - 1) && is_outer_bold(y, x + 1)))
        {
                /* secret door */
                place_secret_door(y, x, DOOR_DEFAULT);

                /* set boundarys so don't get wide doors */
                place_solid_bold(y, x - 1);
                place_solid_bold(y, x + 1);
        }


        /* look at:
         *  x#x
         *  .#.
         *  x#x
         *
         *  where x = don't care
         *  .=floor, #=wall
         */
        if (is_outer_bold(y - 1, x) && is_outer_bold(y + 1, x) &&
            is_floor_bold(y,x-1) && is_floor_bold(y,x+1))
        {
                /* secret door */
                place_secret_door(y, x, DOOR_DEFAULT);

                /* set boundarys so don't get wide doors */
                place_solid_bold(y - 1, x);
                place_solid_bold(y + 1, x);
        }
}


/*
 * Routine that fills the empty areas of a room with treasure and monsters.
 */
static void fill_treasure(int x1, int x2, int y1, int y2, int difficulty)
{
        int x, y, cx, cy, size;
        s32b value;

        /* center of room:*/
        cx = (x1 + x2) / 2;
        cy = (y1 + y2) / 2;

        /* Rough measure of size of vault= sum of lengths of sides */
        size = abs(x2 - x1) + abs(y2 - y1);

        for (x = x1; x <= x2; x++)
        {
                for (y = y1; y <= y2; y++)
                {
                        /* Thing added based on distance to center of vault
                         * Difficulty is 1-easy to 10-hard */
                        value = ((((s32b)(distance(cx, cy, x, y))) * 100) / size) + randint1(10) - difficulty;

                        /* hack- empty square part of the time */
                        if ((randint1(100) - difficulty * 3) > 50) value = 20;

                         /* if floor, shallow water and lava */
                        if (is_floor_bold(y, x) ||
                            (cave_have_flag_bold(y, x, FF_PLACE) && cave_have_flag_bold(y, x, FF_DROP)))
                        {
                                /* The smaller 'value' is, the better the stuff */
                                if (value < 0)
                                {
                                        /* Meanest monster + treasure */
                                        monster_level = base_level + 40;
                                        place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
                                        monster_level = base_level;
                                        object_level = base_level + 20;
                                        place_object(y, x, AM_GOOD);
                                        object_level = base_level;
                                }
                                else if (value < 5)
                                {
                                        /* Mean monster +treasure */
                                        monster_level = base_level + 20;
                                        place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
                                        monster_level = base_level;
                                        object_level = base_level + 10;
                                        place_object(y, x, AM_GOOD);
                                        object_level = base_level;
                                }
                                else if (value < 10)
                                {
                                        /* Monster */
                                        monster_level = base_level + 9;
                                        place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
                                        monster_level = base_level;
                                }
                                else if (value < 17)
                                {
                                        /* Intentional Blank space */

                                        /*
                                         * (Want some of the vault to be empty
                                         * so have room for group monsters.
                                         * This is used in the hack above to lower
                                         * the density of stuff in the vault.)
                                         */
                                }
                                else if (value < 23)
                                {
                                        /* Object or trap */
                                        if (randint0(100) < 25)
                                        {
                                                place_object(y, x, 0L);
                                        }
                                        else
                                        {
                                                place_trap(y, x);
                                        }
                                }
                                else if (value < 30)
                                {
                                        /* Monster and trap */
                                        monster_level = base_level + 5;
                                        place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
                                        monster_level = base_level;
                                        place_trap(y, x);
                                }
                                else if (value < 40)
                                {
                                        /* Monster or object */
                                        if (randint0(100) < 50)
                                        {
                                                monster_level = base_level + 3;
                                                place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
                                                monster_level = base_level;
                                        }
                                        if (randint0(100) < 50)
                                        {
                                                object_level = base_level + 7;
                                                place_object(y, x, 0L);
                                                object_level = base_level;
                                        }
                                }
                                else if (value < 50)
                                {
                                        /* Trap */
                                        place_trap(y, x);
                                }
                                else
                                {
                                        /* Various Stuff */

                                        /* 20% monster, 40% trap, 20% object, 20% blank space */
                                        if (randint0(100) < 20)
                                        {
                                                place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
                                        }
                                        else if (randint0(100) < 50)
                                        {
                                                place_trap(y, x);
                                        }
                                        else if (randint0(100) < 50)
                                        {
                                                place_object(y, x, 0L);
                                        }
                                }

                        }
                }
        }
}


/*
 * This function creates a random vault that looks like a collection of bubbles.
 * It works by getting a set of coordinates that represent the center of each
 * bubble.  The entire room is made by seeing which bubble center is closest. If
 * two centers are equidistant then the square is a wall, otherwise it is a floor.
 * The only exception is for squares really near a center, these are always floor.
 * (It looks better than without this check.)
 *
 * Note: If two centers are on the same point then this algorithm will create a
 *       blank bubble filled with walls. - This is prevented from happening.
 */
static void build_bubble_vault(int x0, int y0, int xsize, int ysize)
{
        #define BUBBLENUM 10            /* number of bubbles */

        /* array of center points of bubbles */
        coord center[BUBBLENUM];

        int i, j, x, y;
        u16b min1, min2, temp;
        bool done;

        /* Offset from center to top left hand corner */
        int xhsize = xsize / 2;
        int yhsize = ysize / 2;


        if (cheat_room) msg_print("Bubble Vault");

        /* Allocate center of bubbles */
        center[0].x = (byte)randint1(xsize - 3) + 1;
        center[0].y = (byte)randint1(ysize - 3) + 1;

        for (i = 1; i < BUBBLENUM; i++)
        {
                done = FALSE;

                /* get center and check to see if it is unique */
                while (!done)
                {
                        done = TRUE;

                        x = randint1(xsize - 3) + 1;
                        y = randint1(ysize - 3) + 1;

                        for (j = 0; j < i; j++)
                        {
                                /* rough test to see if there is an overlap */
                                if ((x == center[j].x) && (y == center[j].y)) done = FALSE;
                        }
                }

                center[i].x = x;
                center[i].y = y;
        }


        /* Top and bottom boundaries */
        for (i = 0; i < xsize; i++)
        {
                int x = x0 - xhsize + i;

                place_outer_noperm_bold(y0 - yhsize + 0, x);
                cave[y0 - yhsize + 0][x].info |= (CAVE_ROOM | CAVE_ICKY);
                place_outer_noperm_bold(y0 - yhsize + ysize - 1, x);
                cave[y0 - yhsize + ysize - 1][x].info |= (CAVE_ROOM | CAVE_ICKY);
        }

        /* Left and right boundaries */
        for (i = 1; i < ysize - 1; i++)
        {
                int y = y0 - yhsize + i;

                place_outer_noperm_bold(y, x0 - xhsize + 0);
                cave[y][x0 - xhsize + 0].info |= (CAVE_ROOM | CAVE_ICKY);
                place_outer_noperm_bold(y, x0 - xhsize + xsize - 1);
                cave[y][x0 - xhsize + xsize - 1].info |= (CAVE_ROOM | CAVE_ICKY);
        }

        /* Fill in middle with bubbles */
        for (x = 1; x < xsize - 1; x++)
        {
                for (y = 1; y < ysize - 1; y++)
                {
                        /* Get distances to two closest centers */

                        /* initialize */
                        min1 = distance(x, y, center[0].x, center[0].y);
                        min2 = distance(x, y, center[1].x, center[1].y);

                        if (min1 > min2)
                        {
                                /* swap if in wrong order */
                                temp = min1;
                                min1 = min2;
                                min2 = temp;
                        }

                        /* Scan the rest */
                        for (i = 2; i < BUBBLENUM; i++)
                        {
                                temp = distance(x, y, center[i].x, center[i].y);

                                if (temp < min1)
                                {
                                        /* smallest */
                                        min2 = min1;
                                        min1 = temp;
                                }
                                else if (temp < min2)
                                {
                                        /* second smallest */
                                        min2 = temp;
                                }
                        }
                        if (((min2 - min1) <= 2) && (!(min1 < 3)))
                        {
                                /* Boundary at midpoint+ not at inner region of bubble */
                                place_outer_noperm_bold(y0 - yhsize + y, x0 - xhsize + x);
                        }
                        else
                        {
                                /* middle of a bubble */
                                place_floor_bold(y0 - yhsize + y, x0 - xhsize + x);
                        }

                        /* clean up rest of flags */
                        cave[y0 - yhsize + y][x0 - xhsize + x].info |= (CAVE_ROOM | CAVE_ICKY);
                }
        }

        /* Try to add some random doors */
        for (i = 0; i < 500; i++)
        {
                x = randint1(xsize - 3) - xhsize + x0 + 1;
                y = randint1(ysize - 3) - yhsize + y0 + 1;
                add_door(x, y);
        }

        /* Fill with monsters and treasure, low difficulty */
        fill_treasure(x0 - xhsize + 1, x0 - xhsize + xsize - 2, y0 - yhsize + 1, y0 - yhsize + ysize - 2, randint1(5));
}


/*
 * Overlay a rectangular room given its bounds
 * This routine is used by build_room_vault
 * The area inside the walls is not touched:
 * only granite is removed- normal walls stay
 */
static void build_room(int x1, int x2, int y1, int y2)
{
        int x, y, i, xsize, ysize, temp;

        /* Check if rectangle has no width */
        if ((x1 == x2) || (y1 == y2)) return;

        /* initialize */
        if (x1 > x2)
        {
                /* Swap boundaries if in wrong order */
                temp = x1;
                x1 = x2;
                x2 = temp;
        }

        if (y1 > y2)
        {
                /* Swap boundaries if in wrong order */
                temp = y1;
                y1 = y2;
                y2 = temp;
        }

        /* get total widths */
        xsize = x2 - x1;
        ysize = y2 - y1;


        /* Top and bottom boundaries */
        for (i = 0; i <= xsize; i++)
        {
                place_outer_noperm_bold(y1, x1 + i);
                cave[y1][x1 + i].info |= (CAVE_ROOM | CAVE_ICKY);
                place_outer_noperm_bold(y2, x1 + i);
                cave[y2][x1 + i].info |= (CAVE_ROOM | CAVE_ICKY);
        }

        /* Left and right boundaries */
        for (i = 1; i < ysize; i++)
        {
                place_outer_noperm_bold(y1 + i, x1);
                cave[y1 + i][x1].info|=(CAVE_ROOM | CAVE_ICKY);
                place_outer_noperm_bold(y1 + i, x2);
                cave[y1 + i][x2].info|=(CAVE_ROOM | CAVE_ICKY);
        }

        /* Middle */
        for (x = 1; x < xsize; x++)
        {
                for (y = 1; y < ysize; y++)
                {
                        if (is_extra_bold(y1+y, x1+x))
                        {
                                /* clear the untouched region */
                                place_floor_bold(y1 + y, x1 + x);
                                cave[y1 + y][x1 + x].info |= (CAVE_ROOM | CAVE_ICKY);
                        }
                        else
                        {
                                /* make it a room- but don't touch */
                                cave[y1 + y][x1 + x].info |= (CAVE_ROOM | CAVE_ICKY);
                        }
                }
        }
}


/* Create a random vault that looks like a collection of overlapping rooms */

static void build_room_vault(int x0, int y0, int xsize, int ysize)
{
        int i, x1, x2, y1, y2, xhsize, yhsize;

        /* get offset from center */
        xhsize = xsize / 2;
        yhsize = ysize / 2;

        if (cheat_room) msg_print("Room Vault");

        /* fill area so don't get problems with arena levels */
        for (x1 = 0; x1 < xsize; x1++)
        {
                int x = x0 - xhsize + x1;

                for (y1 = 0; y1 < ysize; y1++)
                {
                        int y = y0 - yhsize + y1;

                        place_extra_bold(y, x);
                        cave[y][x].info &= (~CAVE_ICKY);
                }
        }

        /* add ten random rooms */
        for (i = 0; i < 10; i++)
        {
                x1 = randint1(xhsize) * 2 + x0 - xhsize;
                x2 = randint1(xhsize) * 2 + x0 - xhsize;
                y1 = randint1(yhsize) * 2 + y0 - yhsize;
                y2 = randint1(yhsize) * 2 + y0 - yhsize;
                build_room(x1, x2, y1, y2);
        }

        /* Add some random doors */
        for (i = 0; i < 500; i++)
        {
                x1 = randint1(xsize - 3) - xhsize + x0 + 1;
                y1 = randint1(ysize - 3) - yhsize + y0 + 1;
                add_door(x1, y1);
        }

        /* Fill with monsters and treasure, high difficulty */
        fill_treasure(x0 - xhsize + 1, x0 - xhsize + xsize - 2, y0 - yhsize + 1, y0 - yhsize + ysize - 2, randint1(5) + 5);
}


/* Create a random vault out of a fractal cave */
static void build_cave_vault(int x0, int y0, int xsiz, int ysiz)
{
        int grd, roug, cutoff, xhsize, yhsize, xsize, ysize, x, y;
        bool done, light, room;

        /* round to make sizes even */
        xhsize = xsiz / 2;
        yhsize = ysiz / 2;
        xsize = xhsize * 2;
        ysize = yhsize * 2;

        if (cheat_room) msg_print("Cave Vault");

        light = done = FALSE;
        room = TRUE;

        while (!done)
        {
                /* testing values for these parameters feel free to adjust */
                grd = 1 << randint0(4);

                /* want average of about 16 */
                roug = randint1(8) * randint1(4);

                /* about size/2 */
                cutoff = randint1(xsize / 4) + randint1(ysize / 4) +
                         randint1(xsize / 4) + randint1(ysize / 4);

                /* make it */
                generate_hmap(y0, x0, xsize, ysize, grd, roug, cutoff);

                /* Convert to normal format+ clean up */
                done = generate_fracave(y0, x0, xsize, ysize, cutoff, light, room);
        }

        /* Set icky flag because is a vault */
        for (x = 0; x <= xsize; x++)
        {
                for (y = 0; y <= ysize; y++)
                {
                        cave[y0 - yhsize + y][x0 - xhsize + x].info |= CAVE_ICKY;
                }
        }

        /* Fill with monsters and treasure, low difficulty */
        fill_treasure(x0 - xhsize + 1, x0 - xhsize + xsize - 1, y0 - yhsize + 1, y0 - yhsize + ysize - 1, randint1(5));
}

/*
 * maze vault -- rectangular labyrinthine rooms
 *
 * maze vault uses two routines:
 *    r_visit - a recursive routine that builds the labyrinth
 *    build_maze_vault - a driver routine that calls r_visit and adds
 *                   monsters, traps and treasure
 *
 * The labyrinth is built by creating a spanning tree of a graph.
 * The graph vertices are at
 *    (x, y) = (2j + x1, 2k + y1)   j = 0,...,m-1    k = 0,...,n-1
 * and the edges are the vertical and horizontal nearest neighbors.
 *
 * The spanning tree is created by performing a suitably randomized
 * depth-first traversal of the graph. The only adjustable parameter
 * is the randint0(3) below; it governs the relative density of
 * twists and turns in the labyrinth: smaller number, more twists.
 */
static void r_visit(int y1, int x1, int y2, int x2,
                    int node, int dir, int *visited)
{
        int i, j, m, n, temp, x, y, adj[4];

        /* dimensions of vertex array */
        m = (x2 - x1) / 2 + 1;
        n = (y2 - y1) / 2 + 1;

        /* mark node visited and set it to a floor */
        visited[node] = 1;
        x = 2 * (node % m) + x1;
        y = 2 * (node / m) + y1;
        place_floor_bold(y, x);

        /* setup order of adjacent node visits */
        if (one_in_(3))
        {
                /* pick a random ordering */
                for (i = 0; i < 4; i++)
                        adj[i] = i;
                for (i = 0; i < 4; i++)
                {
                        j = randint0(4);
                        temp = adj[i];
                        adj[i] = adj[j];
                        adj[j] = temp;
                }
                dir = adj[0];
        }
        else
        {
                /* pick a random ordering with dir first */
                adj[0] = dir;
                for (i = 1; i < 4; i++)
                        adj[i] = i;
                for (i = 1; i < 4; i++)
                {
                        j = 1 + randint0(3);
                        temp = adj[i];
                        adj[i] = adj[j];
                        adj[j] = temp;
                }
        }

        for (i = 0; i < 4; i++)
        {
                switch (adj[i])
                {
                        case 0:
                                /* (0,+) - check for bottom boundary */
                                if ((node / m < n - 1) && (visited[node + m] == 0))
                                {
                                        place_floor_bold(y + 1, x);
                                        r_visit(y1, x1, y2, x2, node + m, dir, visited);
                                }
                                break;
                        case 1:
                                /* (0,-) - check for top boundary */
                                if ((node / m > 0) && (visited[node - m] == 0))
                                {
                                        place_floor_bold(y - 1, x);
                                        r_visit(y1, x1, y2, x2, node - m, dir, visited);
                                }
                                break;
                        case 2:
                                /* (+,0) - check for right boundary */
                                if ((node % m < m - 1) && (visited[node + 1] == 0))
                                {
                                        place_floor_bold(y, x + 1);
                                        r_visit(y1, x1, y2, x2, node + 1, dir, visited);
                                }
                                break;
                        case 3:
                                /* (-,0) - check for left boundary */
                                if ((node % m > 0) && (visited[node - 1] == 0))
                                {
                                        place_floor_bold(y, x - 1);
                                        r_visit(y1, x1, y2, x2, node - 1, dir, visited);
                                }
                } /* end switch */
        }
}


void build_maze_vault(int x0, int y0, int xsize, int ysize, bool is_vault)
{
        int y, x, dy, dx;
        int y1, x1, y2, x2;
        int m, n, num_vertices, *visited;
        bool light;
        cave_type *c_ptr;


        if (cheat_room && is_vault) msg_print("Maze Vault");

        /* Choose lite or dark */
        light = ((dun_level <= randint1(25)) && is_vault && !(d_info[dungeon_type].flags1 & DF1_DARKNESS));

        /* Pick a random room size - randomized by calling routine */
        dy = ysize / 2 - 1;
        dx = xsize / 2 - 1;

        y1 = y0 - dy;
        x1 = x0 - dx;
        y2 = y0 + dy;
        x2 = x0 + dx;

        /* generate the room */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        c_ptr->info |= CAVE_ROOM;
                        if (is_vault) c_ptr->info |= CAVE_ICKY;
                        if ((x == x1 - 1) || (x == x2 + 1) || (y == y1 - 1) || (y == y2 + 1))
                        {
                                place_outer_grid(c_ptr);
                        }
                        else if (!is_vault)
                        {
                                place_extra_grid(c_ptr);
                        }
                        else
                        {
                                place_inner_grid(c_ptr);
                        }
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }

        /* dimensions of vertex array */
        m = dx + 1;
        n = dy + 1;
        num_vertices = m * n;

        /* initialize array of visited vertices */
        C_MAKE(visited, num_vertices, int);

        /* traverse the graph to create a spaning tree, pick a random root */
        r_visit(y1, x1, y2, x2, randint0(num_vertices), 0, visited);

        /* Fill with monsters and treasure, low difficulty */
        if (is_vault) fill_treasure(x1, x2, y1, y2, randint1(5));

        C_KILL(visited, num_vertices, int);
}


/* Build a "mini" checkerboard vault
 *
 * This is done by making a permanent wall maze and setting
 * the diagonal sqaures of the checker board to be granite.
 * The vault has two entrances on opposite sides to guarantee
 * a way to get in even if the vault abuts a side of the dungeon.
 */
static void build_mini_c_vault(int x0, int y0, int xsize, int ysize)
{
        int dy, dx;
        int y1, x1, y2, x2, y, x, total;
        int m, n, num_vertices;
        int *visited;

        if (cheat_room) msg_print("Mini Checker Board Vault");

        /* Pick a random room size */
        dy = ysize / 2 - 1;
        dx = xsize / 2 - 1;

        y1 = y0 - dy;
        x1 = x0 - dx;
        y2 = y0 + dy;
        x2 = x0 + dx;


        /* generate the room */
        for (x = x1 - 2; x <= x2 + 2; x++)
        {
                if (!in_bounds(y1-2,x)) break;

                cave[y1-2][x].info |= (CAVE_ROOM | CAVE_ICKY);

                place_outer_noperm_bold(y1-2, x);
        }

        for (x = x1 - 2; x <= x2 + 2; x++)
        {
                if (!in_bounds(y2+2,x)) break;

                cave[y2+2][x].info |= (CAVE_ROOM | CAVE_ICKY);

                place_outer_noperm_bold(y2+2, x);
        }

        for (y = y1 - 2; y <= y2 + 2; y++)
        {
                if (!in_bounds(y,x1-2)) break;

                cave[y][x1-2].info |= (CAVE_ROOM | CAVE_ICKY);

                place_outer_noperm_bold(y, x1-2);
        }

        for (y = y1 - 2; y <= y2 + 2; y++)
        {
                if (!in_bounds(y,x2+2)) break;

                cave[y][x2+2].info |= (CAVE_ROOM | CAVE_ICKY);

                place_outer_noperm_bold(y, x2+2);
        }

        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        cave_type *c_ptr = &cave[y][x];

                        c_ptr->info |= (CAVE_ROOM | CAVE_ICKY);

                        /* Permanent walls */
                        place_inner_perm_grid(c_ptr);
                }
        }


        /* dimensions of vertex array */
        m = dx + 1;
        n = dy + 1;
        num_vertices = m * n;

        /* initialize array of visited vertices */
        C_MAKE(visited, num_vertices, int);

        /* traverse the graph to create a spannng tree, pick a random root */
        r_visit(y1, x1, y2, x2, randint0(num_vertices), 0, visited);

        /* Make it look like a checker board vault */
        for (x = x1; x <= x2; x++)
        {
                for (y = y1; y <= y2; y++)
                {
                        total = x - x1 + y - y1;
                        /* If total is odd- and is a floor then make a wall */
                        if ((total % 2 == 1) && is_floor_bold(y, x))
                        {
                                place_inner_bold(y, x);
                        }
                }
        }

        /* Make a couple of entrances */
        if (one_in_(2))
        {
                /* left and right */
                y = randint1(dy) + dy / 2;
                place_inner_bold(y1 + y, x1 - 1);
                place_inner_bold(y1 + y, x2 + 1);
        }
        else
        {
                /* top and bottom */
                x = randint1(dx) + dx / 2;
                place_inner_bold(y1 - 1, x1 + x);
                place_inner_bold(y2 + 1, x1 + x);
        }

        /* Fill with monsters and treasure, highest difficulty */
        fill_treasure(x1, x2, y1, y2, 10);

        C_KILL(visited, num_vertices, int);
}


/* Build a town/ castle by using a recursive algorithm.
 * Basically divide each region in a probalistic way to create
 * smaller regions.  When the regions get too small stop.
 *
 * The power variable is a measure of how well defended a region is.
 * This alters the possible choices.
 */
static void build_recursive_room(int x1, int y1, int x2, int y2, int power)
{
        int xsize, ysize;
        int x, y;
        int choice;

        /* Temp variables */
        int t1, t2, t3, t4;

        xsize = x2 - x1;
        ysize = y2 - y1;

        if ((power < 3) && (xsize > 12) && (ysize > 12))
        {
                /* Need outside wall +keep */
                choice = 1;
        }
        else
        {
                if (power < 10)
                {
                        /* Make rooms + subdivide */
                        if ((randint1(10) > 2) && (xsize < 8) && (ysize < 8))
                        {
                                choice = 4;
                        }
                        else
                        {
                                choice = randint1(2) + 1;
                        }
                }
                else
                {
                        /* Mostly subdivide */
                        choice = randint1(3) + 1;
                }
        }

        /* Based on the choice made above, do something */

        switch (choice)
        {
                case 1:
                {
                        /* Outer walls */

                        /* top and bottom */
                        for (x = x1; x <= x2; x++)
                        {
                                place_outer_bold(y1, x);
                                place_outer_bold(y2, x);
                        }

                        /* left and right */
                        for (y = y1 + 1; y < y2; y++)
                        {
                                place_outer_bold(y, x1);
                                place_outer_bold(y, x2);
                        }

                        /* Make a couple of entrances */
                        if (one_in_(2))
                        {
                                /* left and right */
                                y = randint1(ysize) + y1;
                                place_floor_bold(y, x1);
                                place_floor_bold(y, x2);
                        }
                        else
                        {
                                /* top and bottom */
                                x = randint1(xsize) + x1;
                                place_floor_bold(y1, x);
                                place_floor_bold(y2, x);
                        }

                        /* Select size of keep */
                        t1 = randint1(ysize / 3) + y1;
                        t2 = y2 - randint1(ysize / 3);
                        t3 = randint1(xsize / 3) + x1;
                        t4 = x2 - randint1(xsize / 3);

                        /* Do outside areas */

                        /* Above and below keep */
                        build_recursive_room(x1 + 1, y1 + 1, x2 - 1, t1, power + 1);
                        build_recursive_room(x1 + 1, t2, x2 - 1, y2, power + 1);

                        /* Left and right of keep */
                        build_recursive_room(x1 + 1, t1 + 1, t3, t2 - 1, power + 3);
                        build_recursive_room(t4, t1 + 1, x2 - 1, t2 - 1, power + 3);

                        /* Make the keep itself: */
                        x1 = t3;
                        x2 = t4;
                        y1 = t1;
                        y2 = t2;
                        xsize = x2 - x1;
                        ysize = y2 - y1;
                        power += 2;

                        /* Fall through */
                }
                case 4:
                {
                        /* Try to build a room */
                        if ((xsize < 3) || (ysize < 3))
                        {
                                for (y = y1; y < y2; y++)
                                {
                                        for (x = x1; x < x2; x++)
                                        {
                                                place_inner_bold(y, x);
                                        }
                                }

                                /* Too small */
                                return;
                        }

                        /* Make outside walls */
                        /* top and bottom */
                        for (x = x1 + 1; x <= x2 - 1; x++)
                        {
                                place_inner_bold(y1 + 1, x);
                                place_inner_bold(y2 - 1, x);
                        }

                        /* left and right */
                        for (y = y1 + 1; y <= y2 - 1; y++)
                        {
                                place_inner_bold(y, x1 + 1);
                                place_inner_bold(y, x2 - 1);
                        }

                        /* Make a door */
                        y = randint1(ysize - 3) + y1 + 1;

                        if (one_in_(2))
                        {
                                /* left */
                                place_floor_bold(y, x1 + 1);
                        }
                        else
                        {
                                /* right */
                                place_floor_bold(y, x2 - 1);
                        }

                        /* Build the room */
                        build_recursive_room(x1 + 2, y1 + 2, x2 - 2, y2 - 2, power + 3);
                        break;
                }
                case 2:
                {
                        /* Try and divide vertically */
                        if (xsize < 3)
                        {
                                /* Too small */
                                for (y = y1; y < y2; y++)
                                {
                                        for (x = x1; x < x2; x++)
                                        {
                                                place_inner_bold(y, x);
                                        }
                                }
                                return;
                        }

                        t1 = randint1(xsize - 2) + x1 + 1;
                        build_recursive_room(x1, y1, t1, y2, power - 2);
                        build_recursive_room(t1 + 1, y1, x2, y2, power - 2);
                        break;
                }
                case 3:
                {
                        /* Try and divide horizontally */
                        if (ysize < 3)
                        {
                                /* Too small */
                                for (y = y1; y < y2; y++)
                                {
                                        for (x = x1; x < x2; x++)
                                        {
                                                place_inner_bold(y, x);
                                        }
                                }
                                return;
                        }

                        t1 = randint1(ysize - 2) + y1 + 1;
                        build_recursive_room(x1, y1, x2, t1, power - 2);
                        build_recursive_room(x1, t1 + 1, x2, y2, power - 2);
                        break;
                }
        }
}


/* Build a castle */

/* Driver routine: clear the region and call the recursive
* room routine.
*
*This makes a vault that looks like a castle/ city in the dungeon.
*/
static void build_castle_vault(int x0, int y0, int xsize, int ysize)
{
        int dy, dx;
        int y1, x1, y2, x2;
        int y, x;

        /* Pick a random room size */
        dy = ysize / 2 - 1;
        dx = xsize / 2 - 1;

        y1 = y0 - dy;
        x1 = x0 - dx;
        y2 = y0 + dy;
        x2 = x0 + dx;

        if (cheat_room) msg_print("Castle Vault");

        /* generate the room */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        cave[y][x].info |= (CAVE_ROOM | CAVE_ICKY);
                        /* Make everything a floor */
                        place_floor_bold(y, x);
                }
        }

        /* Make the castle */
        build_recursive_room(x1, y1, x2, y2, randint1(5));

        /* Fill with monsters and treasure, low difficulty */
        fill_treasure(x1, x2, y1, y2, randint1(3));
}


/*
 * Add outer wall to a floored region
 * Note: no range checking is done so must be inside dungeon
 * This routine also stomps on doors
 */
static void add_outer_wall(int x, int y, int light, int x1, int y1, int x2, int y2)
{
        cave_type *c_ptr;
        feature_type *f_ptr;
        int i, j;

        if (!in_bounds(y, x)) return;

        c_ptr = &cave[y][x];

        /* hack- check to see if square has been visited before
        * if so, then exit (use room flag to do this) */
        if (c_ptr->info & CAVE_ROOM) return;

        /* set room flag */
        c_ptr->info |= CAVE_ROOM;

        f_ptr = &f_info[c_ptr->feat];

        if (is_floor_bold(y, x))
        {
                for (i = -1; i <= 1; i++)
                {
                        for (j = -1; j <= 1; j++)
                        {
                                if ((x + i >= x1) && (x + i <= x2) &&
                                         (y + j >= y1) && (y + j <= y2))
                                {
                                        add_outer_wall(x + i, y + j, light, x1, y1, x2, y2);
                                        if (light) c_ptr->info |= CAVE_GLOW;
                                }
                        }
                }
        }
        else if (is_extra_bold(y, x))
        {
                /* Set bounding walls */
                place_outer_bold(y, x);
                if (light) c_ptr->info |= CAVE_GLOW;
        }
        else if (permanent_wall(f_ptr))
        {
                /* Set bounding walls */
                if (light) c_ptr->info |= CAVE_GLOW;
        }
}


/*
 * Hacked distance formula - gives the 'wrong' answer.
 * Used to build crypts
 */
static int dist2(int x1, int y1, int x2, int y2,
                 int h1, int h2, int h3, int h4)
{
        int dx, dy;
        dx = abs(x2 - x1);
        dy = abs(y2 - y1);

        /* Basically this works by taking the normal pythagorean formula
         * and using an expansion to express this in a way without the
         * square root.  This approximate formula is then perturbed to give
         * the distorted results.  (I found this by making a mistake when I was
         * trying to fix the circular rooms.)
         */

        /* h1-h4 are constants that describe the metric */
        if (dx >= 2 * dy) return (dx + (dy * h1) / h2);
        if (dy >= 2 * dx) return (dy + (dx * h1) / h2);
        return (((dx + dy) * 128) / 181 +
                (dx * dx / (dy * h3) + dy * dy / (dx * h3)) * h4);
        /* 128/181 is approx. 1/sqrt(2) */
}


/*
 * Build target vault.
 * This is made by two concentric "crypts" with perpendicular
 * walls creating the cross-hairs.
 */
static void build_target_vault(int x0, int y0, int xsize, int ysize)
{
        int rad, x, y;

        /* Make a random metric */
        int h1, h2, h3, h4;
        h1 = randint1(32) - 16;
        h2 = randint1(16);
        h3 = randint1(32);
        h4 = randint1(32) - 16;

        if (cheat_room) msg_print("Target Vault");

        /* work out outer radius */
        if (xsize > ysize)
        {
                rad = ysize / 2;
        }
        else
        {
                rad = xsize / 2;
        }

        /* Make floor */
        for (x = x0 - rad; x <= x0 + rad; x++)
        {
                for (y = y0 - rad; y <= y0 + rad; y++)
                {
                        /* clear room flag */
                        cave[y][x].info &= ~(CAVE_ROOM);

                        /* Vault - so is "icky" */
                        cave[y][x].info |= CAVE_ICKY;

                        if (dist2(y0, x0, y, x, h1, h2, h3, h4) <= rad - 1)
                        {
                                /* inside- so is floor */
                                place_floor_bold(y, x);
                        }
                        else
                        {
                                /* make granite outside so arena works */
                                place_extra_bold(y, x);
                        }

                        /* proper boundary for arena */
                        if (((y + rad) == y0) || ((y - rad) == y0) ||
                            ((x + rad) == x0) || ((x - rad) == x0))
                        {
                                place_extra_bold(y, x);
                        }
                }
        }

        /* Find visible outer walls and set to be FEAT_OUTER */
        add_outer_wall(x0, y0, FALSE, x0 - rad - 1, y0 - rad - 1,
                       x0 + rad + 1, y0 + rad + 1);

        /* Add inner wall */
        for (x = x0 - rad / 2; x <= x0 + rad / 2; x++)
        {
                for (y = y0 - rad / 2; y <= y0 + rad / 2; y++)
                {
                        if (dist2(y0, x0, y, x, h1, h2, h3, h4) == rad / 2)
                        {
                                /* Make an internal wall */
                                place_inner_bold(y, x);
                        }
                }
        }

        /* Add perpendicular walls */
        for (x = x0 - rad; x <= x0 + rad; x++)
        {
                place_inner_bold(y0, x);
        }

        for (y = y0 - rad; y <= y0 + rad; y++)
        {
                place_inner_bold(y, x0);
        }

        /* Make inner vault */
        for (y = y0 - 1; y <= y0 + 1; y++)
        {
                place_inner_bold(y, x0 - 1);
                place_inner_bold(y, x0 + 1);
        }
        for (x = x0 - 1; x <= x0 + 1; x++)
        {
                place_inner_bold(y0 - 1, x);
                place_inner_bold(y0 + 1, x);
        }

        place_floor_bold(y0, x0);


        /* Add doors to vault */
        /* get two distances so can place doors relative to centre */
        x = (rad - 2) / 4 + 1;
        y = rad / 2 + x;

        add_door(x0 + x, y0);
        add_door(x0 + y, y0);
        add_door(x0 - x, y0);
        add_door(x0 - y, y0);
        add_door(x0, y0 + x);
        add_door(x0, y0 + y);
        add_door(x0, y0 - x);
        add_door(x0, y0 - y);

        /* Fill with stuff - medium difficulty */
        fill_treasure(x0 - rad, x0 + rad, y0 - rad, y0 + rad, randint1(3) + 3);
}


#ifdef ALLOW_CAVERNS_AND_LAKES
/*
 * This routine uses a modified version of the lake code to make a
 * distribution of some terrain type over the vault.  This type
 * depends on the dungeon depth.
 *
 * Miniture rooms are then scattered across the vault.
 */
static void build_elemental_vault(int x0, int y0, int xsiz, int ysiz)
{
        int grd, roug;
        int c1, c2, c3;
        bool done = FALSE;
        int xsize, ysize, xhsize, yhsize, x, y, i;
        int type;


        if (cheat_room) msg_print("Elemental Vault");

        /* round to make sizes even */
        xhsize = xsiz / 2;
        yhsize = ysiz / 2;
        xsize = xhsize * 2;
        ysize = yhsize * 2;

        if (dun_level < 25)
        {
                /* Earth vault  (Rubble) */
                type = LAKE_T_EARTH_VAULT;
        }
        else if (dun_level < 50)
        {
                /* Air vault (Trees) */
                type = LAKE_T_AIR_VAULT;
        }
        else if (dun_level < 75)
        {
                /* Water vault (shallow water) */
                type = LAKE_T_WATER_VAULT;
        }
        else
        {
                /* Fire vault (shallow lava) */
                type = LAKE_T_FIRE_VAULT;
        }

        while (!done)
        {
                /* testing values for these parameters: feel free to adjust */
                grd = 1 << (randint0(3));

                /* want average of about 16 */
                roug = randint1(8) * randint1(4);

                /* Make up size of various componants */
                /* Floor */
                c3 = 2 * xsize / 3;

                /* Deep water/lava */
                c1 = randint0(c3 / 2) + randint0(c3 / 2) - 5;

                /* Shallow boundary */
                c2 = (c1 + c3) / 2;

                /* make it */
                generate_hmap(y0, x0, xsize, ysize, grd, roug, c3);

                /* Convert to normal format+ clean up */
                done = generate_lake(y0, x0, xsize, ysize, c1, c2, c3, type);
        }

        /* Set icky flag because is a vault */
        for (x = 0; x <= xsize; x++)
        {
                for (y = 0; y <= ysize; y++)
                {
                        cave[y0 - yhsize + y][x0 - xhsize + x].info |= CAVE_ICKY;
                }
        }

        /* make a few rooms in the vault */
        for (i = 1; i <= (xsize * ysize) / 50; i++)
        {
                build_small_room(x0 + randint0(xsize - 4) - xsize / 2 + 2,
                                 y0 + randint0(ysize - 4) - ysize / 2 + 2);
        }

        /* Fill with monsters and treasure, low difficulty */
        fill_treasure(x0 - xhsize + 1, x0 - xhsize + xsize - 1,
                      y0 - yhsize + 1, y0 - yhsize + ysize - 1, randint1(5));
}
#endif /* ALLOW_CAVERNS_AND_LAKES */


/*
 * Random vaults
 */
static bool build_type10(void)
{
        int y0, x0, xsize, ysize, vtype;

        /* Get size */
        /* big enough to look good, small enough to be fairly common. */
        xsize = randint1(22) + 22;
        ysize = randint1(11) + 11;

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&y0, &x0, ysize + 1, xsize + 1)) return FALSE;

        /* Select type of vault */
#ifdef ALLOW_CAVERNS_AND_LAKES
        do
        {
                vtype = randint1(15);
        }
        while ((d_info[dungeon_type].flags1 & DF1_NO_CAVE) &&
                ((vtype == 1) || (vtype == 3) || (vtype == 8) || (vtype == 9) || (vtype == 11)));
#else /* ALLOW_CAVERNS_AND_LAKES */
        do
        {
                vtype = randint1(7);
        }
        while ((d_info[dungeon_type].flags1 & DF1_NO_CAVE) &&
                ((vtype == 1) || (vtype == 3)));
#endif /* ALLOW_CAVERNS_AND_LAKES */

        switch (vtype)
        {
                /* Build an appropriate room */
                case 1: case  9: build_bubble_vault(x0, y0, xsize, ysize); break;
                case 2: case 10: build_room_vault(x0, y0, xsize, ysize); break;
                case 3: case 11: build_cave_vault(x0, y0, xsize, ysize); break;
                case 4: case 12: build_maze_vault(x0, y0, xsize, ysize, TRUE); break;
                case 5: case 13: build_mini_c_vault(x0, y0, xsize, ysize); break;
                case 6: case 14: build_castle_vault(x0, y0, xsize, ysize); break;
                case 7: case 15: build_target_vault(x0, y0, xsize, ysize); break;
#ifdef ALLOW_CAVERNS_AND_LAKES
                case 8: build_elemental_vault(x0, y0, xsize, ysize); break;
#endif /* ALLOW_CAVERNS_AND_LAKES */
                /* I know how to add a few more... give me some time. */

                /* Paranoia */
                default: return FALSE;
        }

        return TRUE;
}


/*
 * Build an vertical oval room.
 * For every grid in the possible square, check the distance.
 * If it's less than the radius, make it a room square.
 *
 * When done fill from the inside to find the walls,
 */
static bool build_type11(void)
{
        int rad, x, y, x0, y0;
        int light = FALSE;

        /* Occasional light */
        if ((randint1(dun_level) <= 15) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS)) light = TRUE;

        rad = randint0(9);

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&y0, &x0, rad * 2 + 1, rad * 2 + 1)) return FALSE;

        /* Make circular floor */
        for (x = x0 - rad; x <= x0 + rad; x++)
        {
                for (y = y0 - rad; y <= y0 + rad; y++)
                {
                        if (distance(y0, x0, y, x) <= rad - 1)
                        {
                                /* inside- so is floor */
                                place_floor_bold(y, x);
                        }
                        else if (distance(y0, x0, y, x) <= rad + 1)
                        {
                                /* make granite outside so arena works */
                                place_extra_bold(y, x);
                        }
                }
        }

        /* Find visible outer walls and set to be FEAT_OUTER */
        add_outer_wall(x0, y0, light, x0 - rad, y0 - rad, x0 + rad, y0 + rad);

        return TRUE;
}


/*
 * Build crypt room.
 * For every grid in the possible square, check the (fake) distance.
 * If it's less than the radius, make it a room square.
 *
 * When done fill from the inside to find the walls,
 */
static bool build_type12(void)
{
        int rad, x, y, x0, y0;
        int light = FALSE;
        bool emptyflag = TRUE;

        /* Make a random metric */
        int h1, h2, h3, h4;
        h1 = randint1(32) - 16;
        h2 = randint1(16);
        h3 = randint1(32);
        h4 = randint1(32) - 16;

        /* Occasional light */
        if ((randint1(dun_level) <= 5) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS)) light = TRUE;

        rad = randint1(9);

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&y0, &x0, rad * 2 + 3, rad * 2 + 3)) return FALSE;

        /* Make floor */
        for (x = x0 - rad; x <= x0 + rad; x++)
        {
                for (y = y0 - rad; y <= y0 + rad; y++)
                {
                        /* clear room flag */
                        cave[y][x].info &= ~(CAVE_ROOM);

                        if (dist2(y0, x0, y, x, h1, h2, h3, h4) <= rad - 1)
                        {
                                /* inside - so is floor */
                                place_floor_bold(y, x);
                        }
                        else if (distance(y0, x0, y, x) < 3)
                        {
                                place_floor_bold(y, x);
                        }
                        else
                        {
                                /* make granite outside so arena works */
                                place_extra_bold(y, x);
                        }

                        /* proper boundary for arena */
                        if (((y + rad) == y0) || ((y - rad) == y0) ||
                            ((x + rad) == x0) || ((x - rad) == x0))
                        {
                                place_extra_bold(y, x);
                        }
                }
        }

        /* Find visible outer walls and set to be FEAT_OUTER */
        add_outer_wall(x0, y0, light, x0 - rad - 1, y0 - rad - 1,
                       x0 + rad + 1, y0 + rad + 1);

        /* Check to see if there is room for an inner vault */
        for (x = x0 - 2; x <= x0 + 2; x++)
        {
                for (y = y0 - 2; y <= y0 + 2; y++)
                {
                        if (!is_floor_bold(y, x))
                        {
                                /* Wall in the way */
                                emptyflag = FALSE;
                        }
                }
        }

        if (emptyflag && one_in_(2))
        {
                /* Build the vault */
                build_small_room(x0, y0);

                /* Place a treasure in the vault */
                place_object(y0, x0, 0L);

                /* Let's guard the treasure well */
                vault_monsters(y0, x0, randint0(2) + 3);

                /* Traps naturally */
                vault_traps(y0, x0, 4, 4, randint0(3) + 2);
        }

        return TRUE;
}


/*
 * Helper function for "trapped monster pit"
 */
static bool vault_aux_trapped_pit(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return (FALSE);

        /* No wall passing monster */
        if (r_ptr->flags2 & (RF2_PASS_WALL | RF2_KILL_WALL)) return (FALSE);

        /* Okay */
        return (TRUE);
}


/*
 * Type 13 -- Trapped monster pits
 *
 * A trapped monster pit is a "big" room with a straight corridor in
 * which wall opening traps are placed, and with two "inner" rooms
 * containing a "collection" of monsters of a given type organized in
 * the room.
 *
 * The trapped monster pit appears as shown below, where the actual
 * monsters in each location depend on the type of the pit
 *
 *  #########################
 *  #                       #
 *  ####################### #
 *  #####001123454321100### #
 *  ###0012234567654322100# #
 *  ####################### #
 *  #           ^           #
 *  # #######################
 *  # #0012234567654322100###
 *  # ###001123454321100#####
 *  # #######################
 *  #                       #
 *  #########################
 *
 * Note that the monsters in the pit are now chosen by using "get_mon_num()"
 * to request 16 "appropriate" monsters, sorting them by level, and using
 * the "even" entries in this sorted list for the contents of the pit.
 *
 * Hack -- all of the "dragons" in a "dragon" pit must be the same "color",
 * which is handled by requiring a specific "breath" attack for all of the
 * dragons.  This may include "multi-hued" breath.  Note that "wyrms" may
 * be present in many of the dragon pits, if they have the proper breath.
 *
 * Note the use of the "get_mon_num_prep()" function, and the special
 * "get_mon_num_hook()" restriction function, to prepare the "monster
 * allocation table" in such a way as to optimize the selection of
 * "appropriate" non-unique monsters for the pit.
 *
 * Note that the "get_mon_num()" function may (rarely) fail, in which case
 * the pit will be empty.
 *
 * Note that "monster pits" will never contain "unique" monsters.
 */
static bool build_type13(void)
{
        static int placing[][3] = {
                {-2, -9, 0}, {-2, -8, 0}, {-3, -7, 0}, {-3, -6, 0},
                {+2, -9, 0}, {+2, -8, 0}, {+3, -7, 0}, {+3, -6, 0},
                {-2, +9, 0}, {-2, +8, 0}, {-3, +7, 0}, {-3, +6, 0},
                {+2, +9, 0}, {+2, +8, 0}, {+3, +7, 0}, {+3, +6, 0},
                {-2, -7, 1}, {-3, -5, 1}, {-3, -4, 1}, 
                {+2, -7, 1}, {+3, -5, 1}, {+3, -4, 1}, 
                {-2, +7, 1}, {-3, +5, 1}, {-3, +4, 1}, 
                {+2, +7, 1}, {+3, +5, 1}, {+3, +4, 1},
                {-2, -6, 2}, {-2, -5, 2}, {-3, -3, 2},
                {+2, -6, 2}, {+2, -5, 2}, {+3, -3, 2},
                {-2, +6, 2}, {-2, +5, 2}, {-3, +3, 2},
                {+2, +6, 2}, {+2, +5, 2}, {+3, +3, 2},
                {-2, -4, 3}, {-3, -2, 3},
                {+2, -4, 3}, {+3, -2, 3},
                {-2, +4, 3}, {-3, +2, 3},
                {+2, +4, 3}, {+3, +2, 3},
                {-2, -3, 4}, {-3, -1, 4},
                {+2, -3, 4}, {+3, -1, 4},
                {-2, +3, 4}, {-3, +1, 4},
                {+2, +3, 4}, {+3, +1, 4},
                {-2, -2, 5}, {-3, 0, 5}, {-2, +2, 5},
                {+2, -2, 5}, {+3, 0, 5}, {+2, +2, 5},
                {-2, -1, 6}, {-2, +1, 6},
                {+2, -1, 6}, {+2, +1, 6},
                {-2, 0, 7}, {+2, 0, 7},
                {0, 0, -1}
        };

        int y, x, y1, x1, y2, x2, xval, yval;
        int i, j;

        int what[16];

        monster_type align;

        cave_type *c_ptr;

        int cur_pit_type = pick_vault_type(pit_types, d_info[dungeon_type].pit);
        vault_aux_type *n_ptr;

        /* Only in Angband */
        if (dungeon_type != DUNGEON_ANGBAND) return FALSE;

        /* No type available */
        if (cur_pit_type < 0) return FALSE;

        n_ptr = &pit_types[cur_pit_type];

        /* Process a preparation function if necessary */
        if (n_ptr->prep_func) (*(n_ptr->prep_func))();

        /* Prepare allocation table */
        get_mon_num_prep(n_ptr->hook_func, vault_aux_trapped_pit);

        align.sub_align = SUB_ALIGN_NEUTRAL;

        /* Pick some monster types */
        for (i = 0; i < 16; i++)
        {
                int r_idx = 0, attempts = 100;
                monster_race *r_ptr = NULL;

                while (attempts--)
                {
                        /* Get a (hard) monster type */
                        r_idx = get_mon_num(dun_level + 0);
                        r_ptr = &r_info[r_idx];

                        /* Decline incorrect alignment */
                        if (monster_has_hostile_align(&align, 0, 0, r_ptr)) continue;

                        /* Accept this monster */
                        break;
                }

                /* Notice failure */
                if (!r_idx || !attempts) return FALSE;

                /* Note the alignment */
                if (r_ptr->flags3 & RF3_EVIL) align.sub_align |= SUB_ALIGN_EVIL;
                if (r_ptr->flags3 & RF3_GOOD) align.sub_align |= SUB_ALIGN_GOOD;

                what[i] = r_idx;
        }

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, 13, 25)) return FALSE;

        /* Large room */
        y1 = yval - 5;
        y2 = yval + 5;
        x1 = xval - 11;
        x2 = xval + 11;

        /* Fill with inner walls */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_inner_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                }
        }

        /* Place the floor area 1 */
        for (x = x1 + 3; x <= x2 - 3; x++)
        {
                c_ptr = &cave[yval-2][x];
                place_floor_grid(c_ptr);
                add_cave_info(yval-2, x, CAVE_ICKY);

                c_ptr = &cave[yval+2][x];
                place_floor_grid(c_ptr);
                add_cave_info(yval+2, x, CAVE_ICKY);
        }

        /* Place the floor area 2 */
        for (x = x1 + 5; x <= x2 - 5; x++)
        {
                c_ptr = &cave[yval-3][x];
                place_floor_grid(c_ptr);
                add_cave_info(yval-3, x, CAVE_ICKY);

                c_ptr = &cave[yval+3][x];
                place_floor_grid(c_ptr);
                add_cave_info(yval+3, x, CAVE_ICKY);
        }

        /* Corridor */
        for (x = x1; x <= x2; x++)
        {
                c_ptr = &cave[yval][x];
                place_floor_grid(c_ptr);
                c_ptr = &cave[y1][x];
                place_floor_grid(c_ptr);
                c_ptr = &cave[y2][x];
                place_floor_grid(c_ptr);
        }

        /* Place the outer walls */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2 + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2 + 1][x];
                place_outer_grid(c_ptr);
        }

        /* Random corridor */
        if (one_in_(2))
        {
                for (y = y1; y <= yval; y++)
                {
                        place_floor_bold(y, x2);
                        place_solid_bold(y, x1-1);
                }
                for (y = yval; y <= y2 + 1; y++)
                {
                        place_floor_bold(y, x1);
                        place_solid_bold(y, x2+1);
                }
        }
        else
        {
                for (y = yval; y <= y2 + 1; y++)
                {
                        place_floor_bold(y, x1);
                        place_solid_bold(y, x2+1);
                }
                for (y = y1; y <= yval; y++)
                {
                        place_floor_bold(y, x2);
                        place_solid_bold(y, x1-1);
                }
        }

        /* Place the wall open trap */
        cave[yval][xval].mimic = cave[yval][xval].feat;
        cave[yval][xval].feat = feat_trap_open;

        /* Sort the entries */
        for (i = 0; i < 16 - 1; i++)
        {
                /* Sort the entries */
                for (j = 0; j < 16 - 1; j++)
                {
                        int i1 = j;
                        int i2 = j + 1;

                        int p1 = r_info[what[i1]].level;
                        int p2 = r_info[what[i2]].level;

                        /* Bubble */
                        if (p1 > p2)
                        {
                                int tmp = what[i1];
                                what[i1] = what[i2];
                                what[i2] = tmp;
                        }
                }
        }

        /* Message */
        if (cheat_room)
        {
                /* Room type */
#ifdef JP
                msg_format("%s%s¤Î櫥ԥåÈ", n_ptr->name, pit_subtype_string(cur_pit_type, FALSE));
#else
                msg_format("Trapped monster pit (%s%s)", n_ptr->name, pit_subtype_string(cur_pit_type, FALSE));
#endif
        }

        /* Select the entries */
        for (i = 0; i < 8; i++)
        {
                /* Every other entry */
                what[i] = what[i * 2];

                if (cheat_hear)
                {
                        /* Message */
                        msg_print(r_name + r_info[what[i]].name);
                }
        }

        for (i = 0; placing[i][2] >= 0; i++)
        {
                y = yval + placing[i][0];
                x = xval + placing[i][1];
                place_monster_aux(0, y, x, what[placing[i][2]], PM_NO_KAGE);
        }

        return TRUE;
}


/*
 * Type 14 -- trapped rooms
 *
 * A special trap is placed at center of the room
 */
static bool build_type14(void)
{
        int y, x, y2, x2, yval, xval;
        int y1, x1, xsize, ysize;

        bool light;

        cave_type *c_ptr;
        s16b trap;

        /* Pick a room size */
        y1 = randint1(4);
        x1 = randint1(11);
        y2 = randint1(3);
        x2 = randint1(11);

        xsize = x1 + x2 + 1;
        ysize = y1 + y2 + 1;

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, ysize + 2, xsize + 2)) return FALSE;

        /* Choose lite or dark */
        light = ((dun_level <= randint1(25)) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS));


        /* Get corner values */
        y1 = yval - ysize / 2;
        x1 = xval - xsize / 2;
        y2 = yval + (ysize - 1) / 2;
        x2 = xval + (xsize - 1) / 2;


        /* Place a full floor under the room */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }

        /* Walls around the room */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y][x2 + 1];
                place_outer_grid(c_ptr);
        }
        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_outer_grid(c_ptr);
                c_ptr = &cave[y2 + 1][x];
                place_outer_grid(c_ptr);
        }

        if (dun_level < 30 + randint1(30))
                trap = feat_trap_piranha;
        else
                trap = feat_trap_armageddon;

        /* Place a special trap */
        c_ptr = &cave[rand_spread(yval, ysize/4)][rand_spread(xval, xsize/4)];
        c_ptr->mimic = c_ptr->feat;
        c_ptr->feat = trap;

        /* Message */
        if (cheat_room)
        {
#ifdef JP
                msg_format("%s¤ÎÉô²°", f_name + f_info[trap].name);
#else
                msg_format("Room of %s", f_name + f_info[trap].name);
#endif
        }

        return TRUE;
}


/*
 * Helper function for "glass room"
 */
static bool vault_aux_lite(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return FALSE;

        /* Require lite attack */
        if (!(r_ptr->flags4 & RF4_BR_LITE) && !(r_ptr->flags5 & RF5_BA_LITE)) return FALSE;

        /* No wall passing monsters */
        if (r_ptr->flags2 & (RF2_PASS_WALL | RF2_KILL_WALL)) return FALSE;

        /* No disintegrating monsters */
        if (r_ptr->flags4 & RF4_BR_DISI) return FALSE;

        return TRUE;
}

/*
 * Helper function for "glass room"
 */
static bool vault_aux_shards(int r_idx)
{
        monster_race *r_ptr = &r_info[r_idx];

        /* Validate the monster */
        if (!vault_monster_okay(r_idx)) return FALSE;

        /* Require shards breath attack */
        if (!(r_ptr->flags4 & RF4_BR_SHAR)) return FALSE;

        return TRUE;
}

/*
 * Hack -- determine if a template is potion
 */
static bool kind_is_potion(int k_idx)
{
        return k_info[k_idx].tval == TV_POTION;
}

/*
 * Type 15 -- glass rooms
 */
static bool build_type15(void)
{
        int y, x, y2, x2, yval, xval;
        int y1, x1, xsize, ysize;
        bool light;

        cave_type *c_ptr;

        /* Pick a room size */
        xsize = rand_range(9, 13);
        ysize = rand_range(9, 13);

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, ysize + 2, xsize + 2)) return FALSE;

        /* Choose lite or dark */
        light = ((dun_level <= randint1(25)) && !(d_info[dungeon_type].flags1 & DF1_DARKNESS));

        /* Get corner values */
        y1 = yval - ysize / 2;
        x1 = xval - xsize / 2;
        y2 = yval + (ysize - 1) / 2;
        x2 = xval + (xsize - 1) / 2;

        /* Place a full floor under the room */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                for (x = x1 - 1; x <= x2 + 1; x++)
                {
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->feat = feat_glass_floor;
                        c_ptr->info |= (CAVE_ROOM);
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }

        /* Walls around the room */
        for (y = y1 - 1; y <= y2 + 1; y++)
        {
                c_ptr = &cave[y][x1 - 1];
                place_outer_grid(c_ptr);
                c_ptr->feat = feat_glass_wall;
                c_ptr = &cave[y][x2 + 1];
                place_outer_grid(c_ptr);
                c_ptr->feat = feat_glass_wall;
        }
        for (x = x1 - 1; x <= x2 + 1; x++)
        {
                c_ptr = &cave[y1 - 1][x];
                place_outer_grid(c_ptr);
                c_ptr->feat = feat_glass_wall;
                c_ptr = &cave[y2 + 1][x];
                place_outer_grid(c_ptr);
                c_ptr->feat = feat_glass_wall;
        }

        switch (randint1(3))
        {
        case 1: /* 4 lite breathers + potion */
                {
                        int dir1, dir2;

                        /* Prepare allocation table */
                        get_mon_num_prep(vault_aux_lite, NULL);

                        /* Place fixed lite berathers */
                        for (dir1 = 4; dir1 < 8; dir1++)
                        {
                                int r_idx = get_mon_num(dun_level);

                                y = yval + 2 * ddy_ddd[dir1];
                                x = xval + 2 * ddx_ddd[dir1];
                                if (r_idx) place_monster_aux(0, y, x, r_idx, PM_ALLOW_SLEEP);

                                /* Walls around the breather */
                                for (dir2 = 0; dir2 < 8; dir2++)
                                {
                                        c_ptr = &cave[y + ddy_ddd[dir2]][x + ddx_ddd[dir2]];
                                        place_inner_grid(c_ptr);
                                        c_ptr->feat = feat_glass_wall;
                                }
                        }

                        /* Walls around the potion */
                        for (dir1 = 0; dir1 < 4; dir1++)
                        {
                                y = yval + 2 * ddy_ddd[dir1];
                                x = xval + 2 * ddx_ddd[dir1];
                                c_ptr = &cave[y][x];
                                place_inner_perm_grid(c_ptr);
                                c_ptr->feat = feat_permanent_glass_wall;
                                cave[yval + ddy_ddd[dir1]][xval + ddx_ddd[dir1]].info |= (CAVE_ICKY);
                        }

                        /* Glass door */
                        dir1 = randint0(4);
                        y = yval + 2 * ddy_ddd[dir1];
                        x = xval + 2 * ddx_ddd[dir1];
                        place_secret_door(y, x, DOOR_GLASS_DOOR);
                        c_ptr = &cave[y][x];
                        if (is_closed_door(c_ptr->feat)) c_ptr->mimic = feat_glass_wall;

                        /* Place a potion */
                        get_obj_num_hook = kind_is_potion;
                        place_object(yval, xval, AM_NO_FIXED_ART);
                        cave[yval][xval].info |= (CAVE_ICKY);
                }
                break;

        case 2: /* 1 lite breather + random object */
                {
                        int r_idx, dir1;

                        /* Pillars */
                        c_ptr = &cave[y1 + 1][x1 + 1];
                        place_inner_grid(c_ptr);
                        c_ptr->feat = feat_glass_wall;

                        c_ptr = &cave[y1 + 1][x2 - 1];
                        place_inner_grid(c_ptr);
                        c_ptr->feat = feat_glass_wall;

                        c_ptr = &cave[y2 - 1][x1 + 1];
                        place_inner_grid(c_ptr);
                        c_ptr->feat = feat_glass_wall;

                        c_ptr = &cave[y2 - 1][x2 - 1];
                        place_inner_grid(c_ptr);
                        c_ptr->feat = feat_glass_wall;

                        /* Prepare allocation table */
                        get_mon_num_prep(vault_aux_lite, NULL);

                        r_idx = get_mon_num(dun_level);
                        if (r_idx) place_monster_aux(0, yval, xval, r_idx, 0L);

                        /* Walls around the breather */
                        for (dir1 = 0; dir1 < 8; dir1++)
                        {
                                c_ptr = &cave[yval + ddy_ddd[dir1]][xval + ddx_ddd[dir1]];
                                place_inner_grid(c_ptr);
                                c_ptr->feat = feat_glass_wall;
                        }

                        /* Curtains around the breather */
                        for (y = yval - 1; y <= yval + 1; y++)
                        {
                                place_closed_door(y, xval - 2, DOOR_CURTAIN);
                                place_closed_door(y, xval + 2, DOOR_CURTAIN);
                        }
                        for (x = xval - 1; x <= xval + 1; x++)
                        {
                                place_closed_door(yval - 2, x, DOOR_CURTAIN);
                                place_closed_door(yval + 2, x, DOOR_CURTAIN);
                        }

                        /* Place an object */
                        place_object(yval, xval, AM_NO_FIXED_ART);
                        cave[yval][xval].info |= (CAVE_ICKY);
                }
                break;

        case 3: /* 4 shards breathers + 2 potions */
                {
                        int dir1;

                        /* Walls around the potion */
                        for (y = yval - 2; y <= yval + 2; y++)
                        {
                                c_ptr = &cave[y][xval - 3];
                                place_inner_grid(c_ptr);
                                c_ptr->feat = feat_glass_wall;
                                c_ptr = &cave[y][xval + 3];
                                place_inner_grid(c_ptr);
                                c_ptr->feat = feat_glass_wall;
                        }
                        for (x = xval - 2; x <= xval + 2; x++)
                        {
                                c_ptr = &cave[yval - 3][x];
                                place_inner_grid(c_ptr);
                                c_ptr->feat = feat_glass_wall;
                                c_ptr = &cave[yval + 3][x];
                                place_inner_grid(c_ptr);
                                c_ptr->feat = feat_glass_wall;
                        }
                        for (dir1 = 4; dir1 < 8; dir1++)
                        {
                                c_ptr = &cave[yval + 2 * ddy_ddd[dir1]][xval + 2 * ddx_ddd[dir1]];
                                place_inner_grid(c_ptr);
                                c_ptr->feat = feat_glass_wall;
                        }

                        /* Prepare allocation table */
                        get_mon_num_prep(vault_aux_shards, NULL);

                        /* Place shard berathers */
                        for (dir1 = 4; dir1 < 8; dir1++)
                        {
                                int r_idx = get_mon_num(dun_level);

                                y = yval + ddy_ddd[dir1];
                                x = xval + ddx_ddd[dir1];
                                if (r_idx) place_monster_aux(0, y, x, r_idx, 0L);
                        }

                        /* Place two potions */
                        if (one_in_(2))
                        {
                                get_obj_num_hook = kind_is_potion;
                                place_object(yval, xval - 1, AM_NO_FIXED_ART);
                                get_obj_num_hook = kind_is_potion;
                                place_object(yval, xval + 1, AM_NO_FIXED_ART);
                        }
                        else
                        {
                                get_obj_num_hook = kind_is_potion;
                                place_object(yval - 1, xval, AM_NO_FIXED_ART);
                                get_obj_num_hook = kind_is_potion;
                                place_object(yval + 1, xval, AM_NO_FIXED_ART);
                        }

                        for (y = yval - 2; y <= yval + 2; y++)
                                for (x = xval - 2; x <= xval + 2; x++)
                                        cave[y][x].info |= (CAVE_ICKY);

                }
                break;
        }

        /* Message */
        if (cheat_room)
        {
#ifdef JP
                msg_print("¥¬¥é¥¹¤ÎÉô²°");
#else
                msg_print("Glass room");
#endif
        }

        return TRUE;
}


/* Create a new floor room with optional light */
void generate_room_floor(int y1, int x1, int y2, int x2, int light)
{
        int y, x;
        
        cave_type *c_ptr;

        for (y = y1; y <= y2; y++)
        {
                for (x = x1; x <= x2; x++)
                {
                        /* Point to grid */
                        c_ptr = &cave[y][x];
                        place_floor_grid(c_ptr);
                        c_ptr->info |= (CAVE_ROOM);
                        if (light) c_ptr->info |= (CAVE_GLOW);
                }
        }
}

void generate_fill_perm_bold(int y1, int x1, int y2, int x2)
{
        int y, x;

        for (y = y1; y <= y2; y++)
        {
                for (x = x1; x <= x2; x++)
                {
                        /* Point to grid */
                        place_inner_perm_bold(y, x);
                }
        }
}

/* Minimum & maximum town size */
#define MIN_TOWN_WID ((MAX_WID / 3) / 2)
#define MIN_TOWN_HGT ((MAX_HGT / 3) / 2)
#define MAX_TOWN_WID ((MAX_WID / 3) * 2 / 3)
#define MAX_TOWN_HGT ((MAX_HGT / 3) * 2 / 3)

/* Struct for build underground buildings */
typedef struct
{
        int y0, x0; /* North-west corner (relative) */
        int y1, x1; /* South-east corner (relative) */
}
ugbldg_type;

ugbldg_type *ugbldg;

/*
 * Precalculate buildings' location of underground arcade
 */
static bool precalc_ugarcade(int town_hgt, int town_wid, int n)
{
        int i, y, x, center_y, center_x, tmp, attempt = 10000;
        int max_bldg_hgt = 3 * town_hgt / MAX_TOWN_HGT;
        int max_bldg_wid = 5 * town_wid / MAX_TOWN_WID;
        ugbldg_type *cur_ugbldg;
        bool **ugarcade_used, abort;

        /* Allocate "ugarcade_used" array (2-dimension) */
        C_MAKE(ugarcade_used, town_hgt, bool *);
        C_MAKE(*ugarcade_used, town_hgt * town_wid, bool);
        for (y = 1; y < town_hgt; y++) ugarcade_used[y] = *ugarcade_used + y * town_wid;

        /* Calculate building locations */
        for (i = 0; i < n; i++)
        {
                cur_ugbldg = &ugbldg[i];
                (void)WIPE(cur_ugbldg, ugbldg_type);

                do
                {
                        /* Find the "center" of the store */
                        center_y = rand_range(2, town_hgt - 3);
                        center_x = rand_range(2, town_wid - 3);

                        /* Determine the store boundaries */
                        tmp = center_y - randint1(max_bldg_hgt);
                        cur_ugbldg->y0 = MAX(tmp, 1);
                        tmp = center_x - randint1(max_bldg_wid);
                        cur_ugbldg->x0 = MAX(tmp, 1);
                        tmp = center_y + randint1(max_bldg_hgt);
                        cur_ugbldg->y1 = MIN(tmp, town_hgt - 2);
                        tmp = center_x + randint1(max_bldg_wid);
                        cur_ugbldg->x1 = MIN(tmp, town_wid - 2);

                        /* Scan this building's area */
                        for (abort = FALSE, y = cur_ugbldg->y0; (y <= cur_ugbldg->y1) && !abort; y++)
                        {
                                for (x = cur_ugbldg->x0; x <= cur_ugbldg->x1; x++)
                                {
                                        if (ugarcade_used[y][x])
                                        {
                                                abort = TRUE;
                                                break;
                                        }
                                }
                        }

                        attempt--;
                }
                while (abort && attempt); /* Accept this building if no overlapping */

                /* Failed to generate underground arcade */
                if (!attempt) break;

                /*
                 * Mark to ugarcade_used[][] as "used"
                 * Note: Building-adjacent grids are included for preventing
                 * connected bulidings.
                 */
                for (y = cur_ugbldg->y0 - 1; y <= cur_ugbldg->y1 + 1; y++)
                {
                        for (x = cur_ugbldg->x0 - 1; x <= cur_ugbldg->x1 + 1; x++)
                        {
                                ugarcade_used[y][x] = TRUE;
                        }
                }
        }

        /* Free "ugarcade_used" array (2-dimension) */
        C_KILL(*ugarcade_used, town_hgt * town_wid, bool);
        C_KILL(ugarcade_used, town_hgt, bool *);

        /* If i < n, generation is not allowed */
        return i == n;
}

/*
 * Actually create buildings
 * Note: ltcy and ltcx indicate "left top corner".
 */
static void build_stores(int ltcy, int ltcx, int stores[], int n)
{
        int i, j, y, x;
        ugbldg_type *cur_ugbldg;

        for (i = 0; i < n; i++)
        {
                cur_ugbldg = &ugbldg[i];

                /* Generate new room */
                generate_room_floor(
                        ltcy + cur_ugbldg->y0 - 2, ltcx + cur_ugbldg->x0 - 2,
                        ltcy + cur_ugbldg->y1 + 2, ltcx + cur_ugbldg->x1 + 2,
                        FALSE);
        }

        for (i = 0; i < n; i++)
        {
                cur_ugbldg = &ugbldg[i];

                /* Build an invulnerable rectangular building */
                generate_fill_perm_bold(
                        ltcy + cur_ugbldg->y0, ltcx + cur_ugbldg->x0,
                        ltcy + cur_ugbldg->y1, ltcx + cur_ugbldg->x1);

                /* Pick a door direction (S,N,E,W) */
                switch (randint0(4))
                {
                /* Bottom side */
                case 0:
                        y = cur_ugbldg->y1;
                        x = rand_range(cur_ugbldg->x0, cur_ugbldg->x1);
                        break;

                /* Top side */
                case 1:
                        y = cur_ugbldg->y0;
                        x = rand_range(cur_ugbldg->x0, cur_ugbldg->x1);
                        break;

                /* Right side */
                case 2:
                        y = rand_range(cur_ugbldg->y0, cur_ugbldg->y1);
                        x = cur_ugbldg->x1;
                        break;

                /* Left side */
                default:
                        y = rand_range(cur_ugbldg->y0, cur_ugbldg->y1);
                        x = cur_ugbldg->x0;
                        break;
                }

                for (j = 0; j < max_f_idx; j++)
                {
                        if (have_flag(f_info[j].flags, FF_STORE))
                        {
                                if (f_info[j].subtype == stores[i]) break;
                        }
                }

                /* Clear previous contents, add a store door */
                if (j < max_f_idx)
                {
                        cave_set_feat(ltcy + y, ltcx + x, j);

                        /* Init store */
                        store_init(NO_TOWN, stores[i]);
                }
        }
}


/*
 * Type 16 -- Underground Arcade
 *
 * Town logic flow for generation of new town
 * Originally from Vanilla 3.0.3
 *
 * We start with a fully wiped cave of normal floors.
 *
 * Note that town_gen_hack() plays games with the R.N.G.
 *
 * This function does NOT do anything about the owners of the stores,
 * nor the contents thereof.  It only handles the physical layout.
 */
static bool build_type16(void)
{
        int stores[] =
        {
                STORE_GENERAL, STORE_ARMOURY, STORE_WEAPON, STORE_TEMPLE,
                STORE_ALCHEMIST, STORE_MAGIC, STORE_BLACK, STORE_BOOK,
        };
        int n = sizeof stores / sizeof (int);
        int i, y, x, y1, x1, yval, xval;
        int town_hgt = rand_range(MIN_TOWN_HGT, MAX_TOWN_HGT);
        int town_wid = rand_range(MIN_TOWN_WID, MAX_TOWN_WID);
        bool prevent_bm = FALSE;

        /* Hack -- If already exist black market, prevent building */
        for (y = 0; (y < cur_hgt) && !prevent_bm; y++)
        {
                for (x = 0; x < cur_wid; x++)
                {
                        if (cave[y][x].feat == FF_STORE)
                        {
                                prevent_bm = (f_info[cave[y][x].feat].subtype == STORE_BLACK);
                                break;
                        }
                }
        }
        for (i = 0; i < n; i++)
        {
                if ((stores[i] == STORE_BLACK) && prevent_bm) stores[i] = stores[--n];
        }
        if (!n) return FALSE;

        /* Allocate buildings array */
        C_MAKE(ugbldg, n, ugbldg_type);

        /* If cannot build stores, abort */
        if (!precalc_ugarcade(town_hgt, town_wid, n))
        {
                /* Free buildings array */
                C_KILL(ugbldg, n, ugbldg_type);
                return FALSE;
        }

        /* Find and reserve some space in the dungeon.  Get center of room. */
        if (!find_space(&yval, &xval, town_hgt + 4, town_wid + 4))
        {
                /* Free buildings array */
                C_KILL(ugbldg, n, ugbldg_type);
                return FALSE;
        }

        /* Get top left corner */
        y1 = yval - (town_hgt / 2);
        x1 = xval - (town_wid / 2);

        /* Generate new room */
        generate_room_floor(
                y1 + town_hgt / 3, x1 + town_wid / 3,
                y1 + town_hgt * 2 / 3, x1 + town_wid * 2 / 3, FALSE);

        /* Build stores */
        build_stores(y1, x1, stores, n);

#ifdef JP
        if (cheat_room) msg_print("Ãϲ¼³¹");
#else
        if (cheat_room) msg_print("Underground Arcade");
#endif

        /* Free buildings array */
        C_KILL(ugbldg, n, ugbldg_type);

        return TRUE;
}


/*
 * Attempt to build a room of the given type at the given block
 *
 * Note that we restrict the number of "crowded" rooms to reduce
 * the chance of overflowing the monster list during level creation.
 */
static bool room_build(int typ)
{
        /* Build a room */
        switch (typ)
        {
        /* Build an appropriate room */
        case ROOM_T_NORMAL:        return build_type1();
        case ROOM_T_OVERLAP:       return build_type2();
        case ROOM_T_CROSS:         return build_type3();
        case ROOM_T_INNER_FEAT:    return build_type4();
        case ROOM_T_NEST:          return build_type5();
        case ROOM_T_PIT:           return build_type6();
        case ROOM_T_LESSER_VAULT:  return build_type7();
        case ROOM_T_GREATER_VAULT: return build_type8();
        case ROOM_T_FRACAVE:       return build_type9();
        case ROOM_T_RANDOM_VAULT:  return build_type10();
        case ROOM_T_OVAL:          return build_type11();
        case ROOM_T_CRYPT:         return build_type12();
        case ROOM_T_TRAP_PIT:      return build_type13();
        case ROOM_T_TRAP:          return build_type14();
        case ROOM_T_GLASS:         return build_type15();
        case ROOM_T_ARCADE:        return build_type16();
        }

        /* Paranoia */
        return FALSE;
}


#define MOVE_PLIST(dst, src) (prob_list[dst] += prob_list[src], prob_list[src] = 0)

/*
 * [from SAngband (originally from OAngband)]
 * 
 * Generate rooms in dungeon.  Build bigger rooms at first.
 */
bool generate_rooms(void)
{
        int i;
        bool remain;
        int crowded = 0;
        int total_prob;
        int prob_list[ROOM_T_MAX];
        int rooms_built = 0;
        int area_size = 100 * (cur_hgt*cur_wid) / (MAX_HGT*MAX_WID);
        int level_index = MIN(10, div_round(dun_level, 10));

        /* Number of each type of room on this level */
        s16b room_num[ROOM_T_MAX];

        /* Limit number of rooms */
        int dun_rooms = DUN_ROOMS_MAX * area_size / 100;

        /* Assume normal cave */
        room_info_type *room_info_ptr = room_info_normal;

        /*
         * Initialize probability list.
         */
        for (i = 0; i < ROOM_T_MAX; i++)
        {
                /* No rooms allowed above their minimum depth. */
                if (dun_level < room_info_ptr[i].min_level)
                {
                        prob_list[i] = 0;
                }
                else
                {
                        prob_list[i] = room_info_ptr[i].prob[level_index];
                }
        }

        /*
         * XXX -- Various dungeon types and options.
         */

        /* Ironman sees only Greater Vaults */
        if (ironman_rooms && !((d_info[dungeon_type].flags1 & (DF1_BEGINNER | DF1_CHAMELEON | DF1_SMALLEST))))
        {
                for (i = 0; i < ROOM_T_MAX; i++)
                {
                        if (i == ROOM_T_GREATER_VAULT) prob_list[i] = 1;
                        else prob_list[i] = 0;
                }
        }

        /* Forbidden vaults */
        else if (d_info[dungeon_type].flags1 & DF1_NO_VAULT)
        {
                prob_list[ROOM_T_LESSER_VAULT] = 0;
                prob_list[ROOM_T_GREATER_VAULT] = 0;
                prob_list[ROOM_T_RANDOM_VAULT] = 0;
        }


        /* NO_CAVE dungeon (Castle)*/
        if (d_info[dungeon_type].flags1 & DF1_NO_CAVE)
        {
                MOVE_PLIST(ROOM_T_NORMAL, ROOM_T_FRACAVE);
                MOVE_PLIST(ROOM_T_INNER_FEAT, ROOM_T_CRYPT);
                MOVE_PLIST(ROOM_T_INNER_FEAT, ROOM_T_OVAL);
        }

        /* CAVE dungeon (Orc cave etc.) */
        else if (d_info[dungeon_type].flags1 & DF1_CAVE)
        {
                MOVE_PLIST(ROOM_T_FRACAVE, ROOM_T_NORMAL);
        }

        /* No caves when a (random) cavern exists: they look bad */
        else if (dun->cavern || dun->empty_level)
        {
                prob_list[ROOM_T_FRACAVE] = 0;
        }

        /* Forbidden glass rooms */
        if (!(d_info[dungeon_type].flags1 & DF1_GLASS_ROOM))
        {
                prob_list[ROOM_T_GLASS] = 0;
        }

        if (!(d_info[dungeon_type].flags1 & DF1_ARCADE))
        {
                prob_list[ROOM_T_ARCADE] = 0;
        }

        /*
         * Initialize number of rooms,
         * And calcurate total probability.
         */
        for (total_prob = 0, i = 0; i < ROOM_T_MAX; i++)
        {
                room_num[i] = 0;
                total_prob += prob_list[i];
        }

        /*
         * Prepare the number of rooms, of all types, we should build
         * on this level.
         */
        for (i = dun_rooms; i > 0; i--)
        {
                int room_type;
                int rand = randint0(total_prob);

                /* Get room_type randomly */
                for (room_type = 0; room_type < ROOM_T_MAX; room_type++)
                {
                        if (rand < prob_list[room_type]) break;
                        else rand -= prob_list[room_type];
                }

                /* Paranoia */
                if (room_type >= ROOM_T_MAX) room_type = ROOM_T_NORMAL;

                /* Increase the number of rooms of that type we should build. */
                room_num[room_type]++;

                switch (room_type)
                {
                case ROOM_T_NEST:
                case ROOM_T_PIT:
                case ROOM_T_LESSER_VAULT:
                case ROOM_T_TRAP_PIT:
                case ROOM_T_GLASS:
                case ROOM_T_ARCADE:

                        /* Large room */
                        i -= 2;
                        break;

                case ROOM_T_GREATER_VAULT:
                case ROOM_T_RANDOM_VAULT:

                        /* Largest room */
                        i -= 3;
                        break;
                }
        }

        /*
         * Build each type of room one by one until we cannot build any more.
         * [from SAngband (originally from OAngband)]
         */
        while (TRUE)
        {
                /* Assume no remaining rooms */
                remain = FALSE;

                for (i = 0; i < ROOM_T_MAX; i++)
                {
                        /* What type of room are we building now? */
                        int room_type = room_build_order[i];

                        /* Go next if none available */
                        if (!room_num[room_type]) continue;

                        /* Use up one unit */
                        room_num[room_type]--;

                        /* Build the room. */
                        if (room_build(room_type))
                        {
                                /* Increase the room built count. */
                                rooms_built++;

                                /* Mark as there was some remaining rooms */
                                remain = TRUE;

                                switch (room_type)
                                {
                                case ROOM_T_PIT:
                                case ROOM_T_NEST:
                                case ROOM_T_TRAP_PIT:

                                        /* Avoid too many monsters */
                                        if (++crowded >= 2)
                                        {
                                                room_num[ROOM_T_PIT] = 0;
                                                room_num[ROOM_T_NEST] = 0;
                                                room_num[ROOM_T_TRAP_PIT] = 0;
                                        }
                                        break;

                                case ROOM_T_ARCADE:

                                        /* Avoid double-town */
                                        room_num[ROOM_T_ARCADE] = 0;
                                        break;
                                }
                        }
                }

                /* End loop if no room remain */
                if (!remain) break;
        }

        if (rooms_built < 2) return FALSE;

        if (cheat_room)
        {
#ifdef JP
                msg_format("Éô²°¿ô: %d", rooms_built);
#else
                msg_format("Number of Rooms: %d", rooms_built);
#endif
        }

        return TRUE;
}