-/*!
- * @file grid.c
- * @brief ダンジョンの生成処理の基幹部分 / low-level dungeon creation primitives
- * @date 2014/01/04
- * @author
- * Copyright (c) 1997 Ben Harrison, James E. Wilson, Robert A. Koeneke\n
- *\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
- * \n
- * 2014 Deskull Doxygen向けのコメント整理\n
- */
+
+ /*!
+ * @file grid.c
+ * @brief グリッドの実装 / low level dungeon routines -BEN-
+ * @date 2013/12/30
+ * @author
+ * Copyright (c) 1997 Ben Harrison, James E. Wilson, Robert A. Koeneke\n
+ *\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
+ * \n
+ * Support for Adam Bolt's tileset, lighting and transparency effects\n
+ * by Robert Ruehlmann (rr9@angband.org)\n
+ * \n
+ * 2013 Deskull Doxygen向けのコメント整理\n
+ */
+
#include "angband.h"
+#include "floor.h"
+#include "world.h"
+#include "object-flavor.h"
+#include "object-hook.h"
#include "generate.h"
#include "grid.h"
#include "trap.h"
#include "rooms.h"
#include "monster.h"
-
+#include "quest.h"
+#include "feature.h"
+#include "monster-status.h"
+#include "player-status.h"
+#include "spells.h"
+#include "view-mainwindow.h"
/*!
* @brief 新規フロアに入りたてのプレイヤーをランダムな場所に配置する / Returns random co-ordinates for player/monster/object
POSITION y = 0, x = 0;
int max_attempts = 10000;
- cave_type *c_ptr;
+ grid_type *g_ptr;
feature_type *f_ptr;
/* Place the player */
while (max_attempts--)
{
/* Pick a legal spot */
- y = (POSITION)rand_range(1, cur_hgt - 2);
- x = (POSITION)rand_range(1, cur_wid - 2);
+ y = (POSITION)rand_range(1, current_floor_ptr->height - 2);
+ x = (POSITION)rand_range(1, current_floor_ptr->width - 2);
- c_ptr = &cave[y][x];
+ g_ptr = ¤t_floor_ptr->grid_array[y][x];
/* Must be a "naked" floor grid */
- if (c_ptr->m_idx) continue;
- if (dun_level)
+ if (g_ptr->m_idx) continue;
+ if (current_floor_ptr->dun_level)
{
- f_ptr = &f_info[c_ptr->feat];
+ f_ptr = &f_info[g_ptr->feat];
if (max_attempts > 5000) /* Rule 1 */
{
/* Refuse to start on anti-teleport grids in dungeon */
if (!have_flag(f_ptr->flags, FF_TELEPORTABLE)) continue;
}
- if (!player_can_enter(c_ptr->feat, 0)) continue;
+ if (!player_can_enter(g_ptr->feat, 0)) continue;
if (!in_bounds(y, x)) continue;
/* Refuse to start on anti-teleport grids */
- if (c_ptr->info & (CAVE_ICKY)) continue;
+ if (g_ptr->info & (CAVE_ICKY)) continue;
break;
}
{
bool up_stairs = TRUE;
bool down_stairs = TRUE;
- cave_type *c_ptr;
-
- /* Paranoia */
- c_ptr = &cave[y][x];
- if (!is_floor_grid(c_ptr) || c_ptr->o_idx) return;
+ grid_type *g_ptr;
+ g_ptr = ¤t_floor_ptr->grid_array[y][x];
+ if (!is_floor_grid(g_ptr) || g_ptr->o_idx) return;
/* Town */
- if (!dun_level) up_stairs = FALSE;
+ if (!current_floor_ptr->dun_level) up_stairs = FALSE;
/* Ironman */
if (ironman_downward) up_stairs = FALSE;
/* Bottom */
- if (dun_level >= d_info[dungeon_type].maxdepth) down_stairs = FALSE;
+ if (current_floor_ptr->dun_level >= d_info[p_ptr->dungeon_idx].maxdepth) down_stairs = FALSE;
/* Quest-level */
- if (quest_number(dun_level) && (dun_level > 1)) down_stairs = FALSE;
+ if (quest_number(current_floor_ptr->dun_level) && (current_floor_ptr->dun_level > 1)) down_stairs = FALSE;
/* We can't place both */
if (down_stairs && up_stairs)
{
int tmp, type;
FEAT_IDX feat = feat_none;
- cave_type *c_ptr = &cave[y][x];
+ grid_type *g_ptr = ¤t_floor_ptr->grid_array[y][x];
/* Initialize mimic info */
- c_ptr->mimic = 0;
+ g_ptr->mimic = 0;
- if (d_info[dungeon_type].flags1 & DF1_NO_DOORS)
+ if (d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_DOORS)
{
place_floor_bold(y, x);
return;
}
- 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);
+ type = ((d_info[p_ptr->dungeon_idx].flags1 & DF1_CURTAIN) &&
+ one_in_((d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_CAVE) ? 16 : 256)) ? DOOR_CURTAIN :
+ ((d_info[p_ptr->dungeon_idx].flags1 & DF1_GLASS_DOOR) ? DOOR_GLASS_DOOR : DOOR_DOOR);
/* Choose an object */
tmp = randint0(1000);
if (type != DOOR_CURTAIN)
{
/* Hide. If on the edge of room, use outer wall. */
- c_ptr->mimic = room ? feat_wall_outer : fill_type[randint0(100)];
+ g_ptr->mimic = room ? feat_wall_outer : feat_wall_type[randint0(100)];
/* Floor type terrain cannot hide a door */
- if (feat_supports_los(c_ptr->mimic) && !feat_supports_los(c_ptr->feat))
+ if (feat_supports_los(g_ptr->mimic) && !feat_supports_los(g_ptr->feat))
{
- if (have_flag(f_info[c_ptr->mimic].flags, FF_MOVE) || have_flag(f_info[c_ptr->mimic].flags, FF_CAN_FLY))
+ if (have_flag(f_info[g_ptr->mimic].flags, FF_MOVE) || have_flag(f_info[g_ptr->mimic].flags, FF_CAN_FLY))
{
- c_ptr->feat = one_in_(2) ? c_ptr->mimic : floor_type[randint0(100)];
+ g_ptr->feat = one_in_(2) ? g_ptr->mimic : feat_ground_type[randint0(100)];
}
- c_ptr->mimic = 0;
+ g_ptr->mimic = 0;
}
}
}
int tmp;
FEAT_IDX feat = feat_none;
- if (d_info[dungeon_type].flags1 & DF1_NO_DOORS)
+ if (d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_DOORS)
{
place_floor_bold(y, x);
return;
cave_set_feat(y, x, feat);
/* Now it is not floor */
- cave[y][x].info &= ~(CAVE_MASK);
+ current_floor_ptr->grid_array[y][x].info &= ~(CAVE_MASK);
}
else
{
*/
void place_locked_door(POSITION y, POSITION x)
{
- if (d_info[dungeon_type].flags1 & DF1_NO_DOORS)
+ if (d_info[p_ptr->dungeon_idx].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);
+ set_cave_feat(y, x, feat_locked_door_random((d_info[p_ptr->dungeon_idx].flags1 & DF1_GLASS_DOOR) ? DOOR_GLASS_DOOR : DOOR_DOOR));
+ current_floor_ptr->grid_array[y][x].info &= ~(CAVE_FLOOR);
delete_monster(y, x);
}
}
*/
void place_secret_door(POSITION y, POSITION x, int type)
{
- if (d_info[dungeon_type].flags1 & DF1_NO_DOORS)
+ if (d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_DOORS)
{
place_floor_bold(y, x);
}
else
{
- cave_type *c_ptr = &cave[y][x];
+ grid_type *g_ptr = ¤t_floor_ptr->grid_array[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);
+ type = ((d_info[p_ptr->dungeon_idx].flags1 & DF1_CURTAIN) &&
+ one_in_((d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_CAVE) ? 16 : 256)) ? DOOR_CURTAIN :
+ ((d_info[p_ptr->dungeon_idx].flags1 & DF1_GLASS_DOOR) ? DOOR_GLASS_DOOR : DOOR_DOOR);
}
/* Create secret door */
if (type != DOOR_CURTAIN)
{
/* Hide by inner wall because this is used in rooms only */
- c_ptr->mimic = feat_wall_inner;
+ g_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 (feat_supports_los(g_ptr->mimic) && !feat_supports_los(g_ptr->feat))
{
- if (have_flag(f_info[c_ptr->mimic].flags, FF_MOVE) || have_flag(f_info[c_ptr->mimic].flags, FF_CAN_FLY))
+ if (have_flag(f_info[g_ptr->mimic].flags, FF_MOVE) || have_flag(f_info[g_ptr->mimic].flags, FF_CAN_FLY))
{
- c_ptr->feat = one_in_(2) ? c_ptr->mimic : floor_type[randint0(100)];
+ g_ptr->feat = one_in_(2) ? g_ptr->mimic : feat_ground_type[randint0(100)];
}
- c_ptr->mimic = 0;
+ g_ptr->mimic = 0;
}
}
- c_ptr->info &= ~(CAVE_FLOOR);
+ g_ptr->info &= ~(CAVE_FLOOR);
delete_monster(y, x);
}
}
int i, k = 0;
POSITION y, x;
- cave_type *c_ptr;
+ grid_type *g_ptr;
/* Scan adjacent grids */
for (i = 0; i < 4; i++)
/* Extract the location */
y = y1 + ddy_ddd[i];
x = x1 + ddx_ddd[i];
- c_ptr = &cave[y][x];
+ g_ptr = ¤t_floor_ptr->grid_array[y][x];
/* Skip non floors */
- if (cave_have_flag_grid(c_ptr, FF_WALL)) continue;
+ if (cave_have_flag_grid(g_ptr, FF_WALL)) continue;
/* Skip non "empty floor" grids */
- if (!is_floor_grid(c_ptr))
+ if (!is_floor_grid(g_ptr))
continue;
/* Skip grids inside rooms */
- if (c_ptr->info & (CAVE_ROOM)) continue;
+ if (g_ptr->info & (CAVE_ROOM)) continue;
/* Count these grids */
k++;
* @return なし
*/
void try_door(POSITION y, POSITION x)
-{
- /* Paranoia */
- if (!in_bounds(y, x)) return;
+{ if (!in_bounds(y, x)) return;
/* Ignore walls */
if (cave_have_flag_bold(y, x, FF_WALL)) return;
/* Ignore room grids */
- if (cave[y][x].info & (CAVE_ROOM)) return;
+ if (current_floor_ptr->grid_array[y][x].info & (CAVE_ROOM)) return;
/* Occasional door (if allowed) */
- if ((randint0(100) < dun_tun_jct) && possible_doorway(y, x) && !(d_info[dungeon_type].flags1 & DF1_NO_DOORS))
+ if ((randint0(100) < dun_tun_jct) && possible_doorway(y, x) && !(d_info[p_ptr->dungeon_idx].flags1 & DF1_NO_DOORS))
{
/* Place a door */
place_random_door(y, x, FALSE);
int dummy = 0;
int i = 0, j = y, k = x;
- cave_type *c_ptr;
+ grid_type *g_ptr;
/* Attempt to place 'num' objects */
}
/* Require "clean" floor space */
- c_ptr = &cave[j][k];
- if (!is_floor_grid(c_ptr) || c_ptr->o_idx) continue;
+ g_ptr = ¤t_floor_ptr->grid_array[j][k];
+ if (!is_floor_grid(g_ptr) || g_ptr->o_idx) continue;
if (randint0(100) < 75)
{
int count = 0, y1 = y, x1 = x;
int dummy = 0;
- cave_type *c_ptr;
+ grid_type *g_ptr;
/* Place traps */
for (count = 0; count <= 5; count++)
}
/* Require "naked" floor grids */
- c_ptr = &cave[y1][x1];
- if (!is_floor_grid(c_ptr) || c_ptr->o_idx || c_ptr->m_idx) continue;
+ g_ptr = ¤t_floor_ptr->grid_array[y1][x1];
+ if (!is_floor_grid(g_ptr) || g_ptr->o_idx || g_ptr->m_idx) continue;
/* Place the trap */
place_trap(y1, x1);
{
int k, i;
POSITION y, x;
- cave_type *c_ptr;
+ grid_type *g_ptr;
/* Try to summon "num" monsters "near" the given location */
for (k = 0; k < num; k++)
scatter(&y, &x, y1, x1, d, 0);
/* Require "empty" floor grids */
- c_ptr = &cave[y][x];
- if (!cave_empty_grid(c_ptr)) continue;
+ g_ptr = ¤t_floor_ptr->grid_array[y][x];
+ if (!cave_empty_grid(g_ptr)) continue;
/* Place the monster (allow groups) */
- monster_level = base_level + 2;
+ current_floor_ptr->monster_level = current_floor_ptr->base_level + 2;
(void)place_monster(y, x, (PM_ALLOW_SLEEP | PM_ALLOW_GROUP));
- monster_level = base_level;
+ current_floor_ptr->monster_level = current_floor_ptr->base_level;
}
}
}
-
-/*!
- * @brief build_tunnel用に通路を掘るための方向を位置関係通りに決める / Always picks a correct direction
- * @param rdir Y方向に取るべきベクトル値を返す参照ポインタ
- * @param cdir X方向に取るべきベクトル値を返す参照ポインタ
- * @param y1 始点Y座標
- * @param x1 始点X座標
- * @param y2 終点Y座標
- * @param x2 終点X座標
- * @return なし
- */
-void correct_dir(POSITION *rdir, POSITION *cdir, POSITION y1, POSITION x1, POSITION y2, POSITION x2)
-{
- /* Extract vertical and horizontal directions */
- *rdir = (y1 == y2) ? 0 : (y1 < y2) ? 1 : -1;
- *cdir = (x1 == x2) ? 0 : (x1 < x2) ? 1 : -1;
-
- /* Never move diagonally */
- if (*rdir && *cdir)
- {
- if (randint0(100) < 50)
- *rdir = 0;
- else
- *cdir = 0;
- }
-}
-
-/*!
- * @brief build_tunnel用に通路を掘るための方向をランダムに決める / Pick a random direction
- * @param rdir Y方向に取るべきベクトル値を返す参照ポインタ
- * @param cdir X方向に取るべきベクトル値を返す参照ポインタ
- * @return なし
- */
-void rand_dir(POSITION *rdir, POSITION *cdir)
-{
- /* Pick a random direction */
- int i = randint0(4);
-
- /* Extract the dy/dx components */
- *rdir = ddy_ddd[i];
- *cdir = ddx_ddd[i];
-}
-
/*!
* @brief 指定のマスが床系地形であるかを返す / Function that sees if a square is a floor. (Includes range checking.)
* @param x チェックするマスのX座標
return;
}
- if (cave[y][x].info & CAVE_ROOM)
+ if (current_floor_ptr->grid_array[y][x].info & CAVE_ROOM)
{
/* A room border don't touch. */
return;
place_floor_bold(y, x);
}
+/*!
+ * @brief マスにフロア端用の永久壁を配置する / Set boundary mimic and add "solid" perma-wall
+ * @param g_ptr 永久壁を配置したいマス構造体の参照ポインタ
+ * @return なし
+ */
+void place_bound_perm_wall(grid_type *g_ptr)
+{
+ if (bound_walls_perm)
+ {
+ /* Clear boundary mimic */
+ g_ptr->mimic = 0;
+ }
+ else
+ {
+ feature_type *f_ptr = &f_info[g_ptr->feat];
+
+ /* Hack -- Decline boundary walls with known treasure */
+ if ((have_flag(f_ptr->flags, FF_HAS_GOLD) || have_flag(f_ptr->flags, FF_HAS_ITEM)) &&
+ !have_flag(f_ptr->flags, FF_SECRET))
+ g_ptr->feat = feat_state(g_ptr->feat, FF_ENSECRET);
+
+ /* Set boundary mimic */
+ g_ptr->mimic = g_ptr->feat;
+ }
+
+ /* Add "solid" perma-wall */
+ place_solid_perm_grid(g_ptr);
+}
+
+/*!
+ * @brief マスに看破済みの罠があるかの判定を行う。 / Return TRUE if the given grid is a known trap
+ * @param g_ptr マス構造体の参照ポインタ
+ * @return 看破済みの罠があるならTRUEを返す。
+ */
+bool is_known_trap(grid_type *g_ptr)
+{
+ if (!g_ptr->mimic && !cave_have_flag_grid(g_ptr, FF_SECRET) &&
+ is_trap(g_ptr->feat)) return TRUE;
+ else
+ return FALSE;
+}
+
+
+
+/*!
+ * @brief マスに隠されたドアがあるかの判定を行う。 / Return TRUE if the given grid is a hidden closed door
+ * @param g_ptr マス構造体の参照ポインタ
+ * @return 隠されたドアがあるならTRUEを返す。
+ */
+bool is_hidden_door(grid_type *g_ptr)
+{
+ if ((g_ptr->mimic || cave_have_flag_grid(g_ptr, FF_SECRET)) &&
+ is_closed_door(g_ptr->feat))
+ return TRUE;
+ else
+ return FALSE;
+}
+
+#define COMPLEX_WALL_ILLUMINATION /*!< 照明状態を壁により影響を受ける、より複雑な判定に切り替えるマクロ */
+
+
+/*!
+ * @brief 指定された座標のマスが現在照らされているかを返す。 / Check for "local" illumination
+ * @param y y座標
+ * @param x x座標
+ * @return 指定された座標に照明がかかっているならTRUEを返す。。
+ */
+bool check_local_illumination(POSITION y, POSITION x)
+{
+ /* Hack -- move towards player */
+ POSITION yy = (y < p_ptr->y) ? (y + 1) : (y > p_ptr->y) ? (y - 1) : y;
+ POSITION xx = (x < p_ptr->x) ? (x + 1) : (x > p_ptr->x) ? (x - 1) : x;
+
+ /* Check for "local" illumination */
+
+#ifdef COMPLEX_WALL_ILLUMINATION /* COMPLEX_WALL_ILLUMINATION */
+
+ /* Check for "complex" illumination */
+ if ((feat_supports_los(get_feat_mimic(¤t_floor_ptr->grid_array[yy][xx])) &&
+ (current_floor_ptr->grid_array[yy][xx].info & CAVE_GLOW)) ||
+ (feat_supports_los(get_feat_mimic(¤t_floor_ptr->grid_array[y][xx])) &&
+ (current_floor_ptr->grid_array[y][xx].info & CAVE_GLOW)) ||
+ (feat_supports_los(get_feat_mimic(¤t_floor_ptr->grid_array[yy][x])) &&
+ (current_floor_ptr->grid_array[yy][x].info & CAVE_GLOW)))
+ {
+ return TRUE;
+ }
+ else return FALSE;
+
+#else /* COMPLEX_WALL_ILLUMINATION */
+
+ /* Check for "simple" illumination */
+ return (current_floor_ptr->grid_array[yy][xx].info & CAVE_GLOW) ? TRUE : FALSE;
+
+#endif /* COMPLEX_WALL_ILLUMINATION */
+}
+
+
+/*! 対象座標のマスの照明状態を更新する際の補助処理マクロ */
+#define update_local_illumination_aux(Y, X) \
+{ \
+ if (player_has_los_bold((Y), (X))) \
+ { \
+ /* Update the monster */ \
+ if (current_floor_ptr->grid_array[(Y)][(X)].m_idx) update_monster(current_floor_ptr->grid_array[(Y)][(X)].m_idx, FALSE); \
+\
+ /* Notice and redraw */ \
+ note_spot((Y), (X)); \
+ lite_spot((Y), (X)); \
+ } \
+}
+
+/*!
+ * @brief 指定された座標の照明状態を更新する / Update "local" illumination
+ * @param y y座標
+ * @param x x座標
+ * @return なし
+ */
+void update_local_illumination(POSITION y, POSITION x)
+{
+ int i;
+ POSITION yy, xx;
+
+ if (!in_bounds(y, x)) return;
+
+#ifdef COMPLEX_WALL_ILLUMINATION /* COMPLEX_WALL_ILLUMINATION */
+
+ if ((y != p_ptr->y) && (x != p_ptr->x))
+ {
+ yy = (y < p_ptr->y) ? (y - 1) : (y + 1);
+ xx = (x < p_ptr->x) ? (x - 1) : (x + 1);
+ update_local_illumination_aux(yy, xx);
+ update_local_illumination_aux(y, xx);
+ update_local_illumination_aux(yy, x);
+ }
+ else if (x != p_ptr->x) /* y == p_ptr->y */
+ {
+ xx = (x < p_ptr->x) ? (x - 1) : (x + 1);
+ for (i = -1; i <= 1; i++)
+ {
+ yy = y + i;
+ update_local_illumination_aux(yy, xx);
+ }
+ yy = y - 1;
+ update_local_illumination_aux(yy, x);
+ yy = y + 1;
+ update_local_illumination_aux(yy, x);
+ }
+ else if (y != p_ptr->y) /* x == p_ptr->x */
+ {
+ yy = (y < p_ptr->y) ? (y - 1) : (y + 1);
+ for (i = -1; i <= 1; i++)
+ {
+ xx = x + i;
+ update_local_illumination_aux(yy, xx);
+ }
+ xx = x - 1;
+ update_local_illumination_aux(y, xx);
+ xx = x + 1;
+ update_local_illumination_aux(y, xx);
+ }
+ else /* Player's grid */
+ {
+ for (i = 0; i < 8; i++)
+ {
+ yy = y + ddy_cdd[i];
+ xx = x + ddx_cdd[i];
+ update_local_illumination_aux(yy, xx);
+ }
+ }
+
+#else /* COMPLEX_WALL_ILLUMINATION */
+
+ if ((y != p_ptr->y) && (x != p_ptr->x))
+ {
+ yy = (y < p_ptr->y) ? (y - 1) : (y + 1);
+ xx = (x < p_ptr->x) ? (x - 1) : (x + 1);
+ update_local_illumination_aux(yy, xx);
+ }
+ else if (x != p_ptr->x) /* y == p_ptr->y */
+ {
+ xx = (x < p_ptr->x) ? (x - 1) : (x + 1);
+ for (i = -1; i <= 1; i++)
+ {
+ yy = y + i;
+ update_local_illumination_aux(yy, xx);
+ }
+ }
+ else if (y != p_ptr->y) /* x == p_ptr->x */
+ {
+ yy = (y < p_ptr->y) ? (y - 1) : (y + 1);
+ for (i = -1; i <= 1; i++)
+ {
+ xx = x + i;
+ update_local_illumination_aux(yy, xx);
+ }
+ }
+ else /* Player's grid */
+ {
+ for (i = 0; i < 8; i++)
+ {
+ yy = y + ddy_cdd[i];
+ xx = x + ddx_cdd[i];
+ update_local_illumination_aux(yy, xx);
+ }
+ }
+
+#endif /* COMPLEX_WALL_ILLUMINATION */
+}
+
+
+/*!
+ * @brief 指定された座標をプレイヤーが視覚に収められるかを返す。 / Can the player "see" the given grid in detail?
+ * @param y y座標
+ * @param x x座標
+ * @return 視覚に収められる状態ならTRUEを返す
+ * @details
+ * He must have vision, illumination, and line of sight.\n
+ * \n
+ * Note -- "CAVE_LITE" is only set if the "torch" has "los()".\n
+ * So, given "CAVE_LITE", we know that the grid is "fully visible".\n
+ *\n
+ * Note that "CAVE_GLOW" makes little sense for a wall, since it would mean\n
+ * that a wall is visible from any direction. That would be odd. Except\n
+ * under wizard light, which might make sense. Thus, for walls, we require\n
+ * not only that they be "CAVE_GLOW", but also, that they be adjacent to a\n
+ * grid which is not only "CAVE_GLOW", but which is a non-wall, and which is\n
+ * in line of sight of the player.\n
+ *\n
+ * This extra check is expensive, but it provides a more "correct" semantics.\n
+ *\n
+ * Note that we should not run this check on walls which are "outer walls" of\n
+ * the dungeon, or we will induce a memory fault, but actually verifying all\n
+ * of the locations would be extremely expensive.\n
+ *\n
+ * Thus, to speed up the function, we assume that all "perma-walls" which are\n
+ * "CAVE_GLOW" are "illuminated" from all sides. This is correct for all cases\n
+ * except "vaults" and the "buildings" in town. But the town is a hack anyway,\n
+ * and the player has more important things on his mind when he is attacking a\n
+ * monster vault. It is annoying, but an extremely important optimization.\n
+ *\n
+ * Note that "glowing walls" are only considered to be "illuminated" if the\n
+ * grid which is next to the wall in the direction of the player is also a\n
+ * "glowing" grid. This prevents the player from being able to "see" the\n
+ * walls of illuminated rooms from a corridor outside the room.\n
+ */
+bool player_can_see_bold(POSITION y, POSITION x)
+{
+ grid_type *g_ptr;
+
+ /* Blind players see nothing */
+ if (p_ptr->blind) return FALSE;
+
+ g_ptr = ¤t_floor_ptr->grid_array[y][x];
+
+ /* Note that "torch-lite" yields "illumination" */
+ if (g_ptr->info & (CAVE_LITE | CAVE_MNLT)) return TRUE;
+
+ /* Require line of sight to the grid */
+ if (!player_has_los_bold(y, x)) return FALSE;
+
+ /* Noctovision of Ninja */
+ if (p_ptr->see_nocto) return TRUE;
+
+ /* Require "perma-lite" of the grid */
+ if ((g_ptr->info & (CAVE_GLOW | CAVE_MNDK)) != CAVE_GLOW) return FALSE;
+
+ /* Feature code (applying "mimic" field) */
+ /* Floors are simple */
+ if (feat_supports_los(get_feat_mimic(g_ptr))) return TRUE;
+
+ /* Check for "local" illumination */
+ return check_local_illumination(y, x);
+}
+
+/*!
+ * @brief 指定された座標をプレイヤー収められていない状態かどうか / Returns true if the player's grid is dark
+ * @return 視覚に収められていないならTRUEを返す
+ * @details player_can_see_bold()関数の返り値の否定を返している。
+ */
+bool no_lite(void)
+{
+ return (!player_can_see_bold(p_ptr->y, p_ptr->x));
+}
+
+
+/*!
+ * @brief 指定された座標が地震や階段生成の対象となるマスかを返す。 / Determine if a given location may be "destroyed"
+ * @param y y座標
+ * @param x x座標
+ * @return 各種の変更が可能ならTRUEを返す。
+ * @details
+ * 条件は永久地形でなく、なおかつ該当のマスにアーティファクトが存在しないか、である。英語の旧コメントに反して＊破壊＊の抑止判定には現在使われていない。
+ */
+bool cave_valid_bold(POSITION y, POSITION x)
+{
+ grid_type *g_ptr = ¤t_floor_ptr->grid_array[y][x];
+ OBJECT_IDX this_o_idx, next_o_idx = 0;
+
+ /* Forbid perma-grids */
+ if (cave_perma_grid(g_ptr)) return (FALSE);
+
+ /* Check objects */
+ for (this_o_idx = g_ptr->o_idx; this_o_idx; this_o_idx = next_o_idx)
+ {
+ object_type *o_ptr;
+ o_ptr = ¤t_floor_ptr->o_list[this_o_idx];
+ next_o_idx = o_ptr->next_o_idx;
+
+ /* Forbid artifact grids */
+ if (object_is_artifact(o_ptr)) return (FALSE);
+ }
+
+ /* Accept */
+ return (TRUE);
+}
+
+/*
+ * Moves the cursor to a given MAP (y,x) location
+ */
+void move_cursor_relative(int row, int col)
+{
+ /* Real co-ords convert to screen positions */
+ row -= panel_row_prt;
+
+ /* Go there */
+ Term_gotoxy(panel_col_of(col), row);
+}
+
+
+
+/*
+ * Place an attr/char pair at the given map coordinate, if legal.
+ */
+void print_rel(SYMBOL_CODE c, TERM_COLOR a, TERM_LEN y, TERM_LEN x)
+{
+ /* Only do "legal" locations */
+ if (panel_contains(y, x))
+ {
+ /* Hack -- fake monochrome */
+ if (!use_graphics)
+ {
+ if (current_world_ptr->timewalk_m_idx) a = TERM_DARK;
+ else if (IS_INVULN() || p_ptr->timewalk) a = TERM_WHITE;
+ else if (p_ptr->wraith_form) a = TERM_L_DARK;
+ }
+
+ /* Draw the char using the attr */
+ Term_queue_bigchar(panel_col_of(x), y - panel_row_prt, a, c, 0, 0);
+ }
+}
+
+
+
+
+
+/*
+ * Memorize interesting viewable object/features in the given grid
+ *
+ * This function should only be called on "legal" grids.
+ *
+ * This function will memorize the object and/or feature in the given
+ * grid, if they are (1) viewable and (2) interesting. Note that all
+ * objects are interesting, all terrain features except floors (and
+ * invisible traps) are interesting, and floors (and invisible traps)
+ * are interesting sometimes (depending on various options involving
+ * the illumination of floor grids).
+ *
+ * The automatic memorization of all objects and non-floor terrain
+ * features as soon as they are displayed allows incredible amounts
+ * of optimization in various places, especially "map_info()".
+ *
+ * Note that the memorization of objects is completely separate from
+ * the memorization of terrain features, preventing annoying floor
+ * memorization when a detected object is picked up from a dark floor,
+ * and object memorization when an object is dropped into a floor grid
+ * which is memorized but out-of-sight.
+ *
+ * This function should be called every time the "memorization" of
+ * a grid (or the object in a grid) is called into question, such
+ * as when an object is created in a grid, when a terrain feature
+ * "changes" from "floor" to "non-floor", when any grid becomes
+ * "illuminated" or "viewable", and when a "floor" grid becomes
+ * "torch-lit".
+ *
+ * Note the relatively efficient use of this function by the various
+ * "update_view()" and "update_lite()" calls, to allow objects and
+ * terrain features to be memorized (and drawn) whenever they become
+ * viewable or illuminated in any way, but not when they "maintain"
+ * or "lose" their previous viewability or illumination.
+ *
+ * Note the butchered "internal" version of "player_can_see_bold()",
+ * optimized primarily for the most common cases, that is, for the
+ * non-marked floor grids.
+ */
+void note_spot(POSITION y, POSITION x)
+{
+ grid_type *g_ptr = ¤t_floor_ptr->grid_array[y][x];
+ OBJECT_IDX this_o_idx, next_o_idx = 0;
+
+ /* Blind players see nothing */
+ if (p_ptr->blind) return;
+
+ /* Analyze non-torch-lit grids */
+ if (!(g_ptr->info & (CAVE_LITE | CAVE_MNLT)))
+ {
+ /* Require line of sight to the grid */
+ if (!(g_ptr->info & (CAVE_VIEW))) return;
+
+ /* Require "perma-lite" of the grid */
+ if ((g_ptr->info & (CAVE_GLOW | CAVE_MNDK)) != CAVE_GLOW)
+ {
+ /* Not Ninja */
+ if (!p_ptr->see_nocto) return;
+ }
+ }
+
+
+ /* Hack -- memorize objects */
+ for (this_o_idx = g_ptr->o_idx; this_o_idx; this_o_idx = next_o_idx)
+ {
+ object_type *o_ptr = ¤t_floor_ptr->o_list[this_o_idx];
+ next_o_idx = o_ptr->next_o_idx;
+
+ /* Memorize objects */
+ o_ptr->marked |= OM_FOUND;
+ }
+
+
+ /* Hack -- memorize grids */
+ if (!(g_ptr->info & (CAVE_MARK)))
+ {
+ /* Feature code (applying "mimic" field) */
+ feature_type *f_ptr = &f_info[get_feat_mimic(g_ptr)];
+
+ /* Memorize some "boring" grids */
+ if (!have_flag(f_ptr->flags, FF_REMEMBER))
+ {
+ /* Option -- memorize all torch-lit floors */
+ if (view_torch_grids &&
+ ((g_ptr->info & (CAVE_LITE | CAVE_MNLT)) || p_ptr->see_nocto))
+ {
+ g_ptr->info |= (CAVE_MARK);
+ }
+
+ /* Option -- memorize all perma-lit floors */
+ else if (view_perma_grids && ((g_ptr->info & (CAVE_GLOW | CAVE_MNDK)) == CAVE_GLOW))
+ {
+ g_ptr->info |= (CAVE_MARK);
+ }
+ }
+
+ /* Memorize normal grids */
+ else if (have_flag(f_ptr->flags, FF_LOS))
+ {
+ g_ptr->info |= (CAVE_MARK);
+ }
+
+ /* Memorize torch-lit walls */
+ else if (g_ptr->info & (CAVE_LITE | CAVE_MNLT))
+ {
+ g_ptr->info |= (CAVE_MARK);
+ }
+
+ /* Memorize walls seen by noctovision of Ninja */
+ else if (p_ptr->see_nocto)
+ {
+ g_ptr->info |= (CAVE_MARK);
+ }
+
+ /* Memorize certain non-torch-lit wall grids */
+ else if (check_local_illumination(y, x))
+ {
+ g_ptr->info |= (CAVE_MARK);
+ }
+ }
+
+ /* Memorize terrain of the grid */
+ g_ptr->info |= (CAVE_KNOWN);
+}
+
+
+void display_dungeon(void)
+{
+ TERM_LEN x, y;
+ TERM_COLOR a;
+ SYMBOL_CODE c;
+
+ TERM_COLOR ta = 0;
+ SYMBOL_CODE tc = '\0';
+
+ for (x = p_ptr->x - Term->wid / 2 + 1; x <= p_ptr->x + Term->wid / 2; x++)
+ {
+ for (y = p_ptr->y - Term->hgt / 2 + 1; y <= p_ptr->y + Term->hgt / 2; y++)
+ {
+ if (in_bounds2(y, x))
+ {
+ map_info(y, x, &a, &c, &ta, &tc);
+
+ /* Hack -- fake monochrome */
+ if (!use_graphics)
+ {
+ if (current_world_ptr->timewalk_m_idx) a = TERM_DARK;
+ else if (IS_INVULN() || p_ptr->timewalk) a = TERM_WHITE;
+ else if (p_ptr->wraith_form) a = TERM_L_DARK;
+ }
+
+ /* Hack -- Queue it */
+ Term_queue_char(x - p_ptr->x + Term->wid / 2 - 1, y - p_ptr->y + Term->hgt / 2 - 1, a, c, ta, tc);
+ }
+ else
+ {
+ /* Clear out-of-bound tiles */
+
+ /* Access darkness */
+ feature_type *f_ptr = &f_info[feat_none];
+
+ /* Normal attr */
+ a = f_ptr->x_attr[F_LIT_STANDARD];
+
+ /* Normal char */
+ c = f_ptr->x_char[F_LIT_STANDARD];
+
+ /* Hack -- Queue it */
+ Term_queue_char(x - p_ptr->x + Term->wid / 2 - 1, y - p_ptr->y + Term->hgt / 2 - 1, a, c, ta, tc);
+ }
+ }
+ }
+}
+
+
+/*
+ * Redraw (on the screen) a given MAP location
+ *
+ * This function should only be called on "legal" grids
+ */
+void lite_spot(POSITION y, POSITION x)
+{
+ /* Redraw if on screen */
+ if (panel_contains(y, x) && in_bounds2(y, x))
+ {
+ TERM_COLOR a;
+ SYMBOL_CODE c;
+ TERM_COLOR ta;
+ SYMBOL_CODE tc;
+
+ map_info(y, x, &a, &c, &ta, &tc);
+
+ /* Hack -- fake monochrome */
+ if (!use_graphics)
+ {
+ if (current_world_ptr->timewalk_m_idx) a = TERM_DARK;
+ else if (IS_INVULN() || p_ptr->timewalk) a = TERM_WHITE;
+ else if (p_ptr->wraith_form) a = TERM_L_DARK;
+ }
+
+ /* Hack -- Queue it */
+ Term_queue_bigchar(panel_col_of(x), y - panel_row_prt, a, c, ta, tc);
+
+ /* Update sub-windows */
+ p_ptr->window |= (PW_OVERHEAD | PW_DUNGEON);
+ }
+}
+
+
+/*
+ * print project path
+ */
+void prt_path(POSITION y, POSITION x)
+{
+ int i;
+ int path_n;
+ u16b path_g[512];
+ byte_hack default_color = TERM_SLATE;
+
+ if (!display_path) return;
+ if (-1 == project_length)
+ return;
+
+ /* Get projection path */
+ path_n = project_path(path_g, (project_length ? project_length : MAX_RANGE), p_ptr->y, p_ptr->x, y, x, PROJECT_PATH | PROJECT_THRU);
+
+ p_ptr->redraw |= (PR_MAP);
+ handle_stuff();
+
+ /* Draw path */
+ for (i = 0; i < path_n; i++)
+ {
+ POSITION ny = GRID_Y(path_g[i]);
+ POSITION nx = GRID_X(path_g[i]);
+ grid_type *g_ptr = ¤t_floor_ptr->grid_array[ny][nx];
+
+ if (panel_contains(ny, nx))
+ {
+ TERM_COLOR a = default_color;
+ char c;
+
+ TERM_COLOR ta = default_color;
+ char tc = '*';
+
+ if (g_ptr->m_idx && current_floor_ptr->m_list[g_ptr->m_idx].ml)
+ {
+ /* Determine what is there */
+ map_info(ny, nx, &a, &c, &ta, &tc);
+
+ if (!is_ascii_graphics(a))
+ a = default_color;
+ else if (c == '.' && (a == TERM_WHITE || a == TERM_L_WHITE))
+ a = default_color;
+ else if (a == default_color)
+ a = TERM_WHITE;
+ }
+
+ if (!use_graphics)
+ {
+ if (current_world_ptr->timewalk_m_idx) a = TERM_DARK;
+ else if (IS_INVULN() || p_ptr->timewalk) a = TERM_WHITE;
+ else if (p_ptr->wraith_form) a = TERM_L_DARK;
+ }
+
+ c = '*';
+
+ /* Hack -- Queue it */
+ Term_queue_bigchar(panel_col_of(nx), ny - panel_row_prt, a, c, ta, tc);
+ }
+
+ /* Known Wall */
+ if ((g_ptr->info & CAVE_MARK) && !cave_have_flag_grid(g_ptr, FF_PROJECT)) break;
+
+ /* Change color */
+ if (nx == x && ny == y) default_color = TERM_L_DARK;
+ }
+}
+
+/*
+ * Some comments on the grid flags. -BEN-
+ *
+ *
+ * One of the major bottlenecks in previous versions of Angband was in
+ * the calculation of "line of sight" from the player to various grids,
+ * such as monsters. This was such a nasty bottleneck that a lot of
+ * silly things were done to reduce the dependancy on "line of sight",
+ * for example, you could not "see" any grids in a lit room until you
+ * actually entered the room, and there were all kinds of bizarre grid
+ * flags to enable this behavior. This is also why the "call light"
+ * spells always lit an entire room.
+ *
+ * The code below provides functions to calculate the "field of view"
+ * for the player, which, once calculated, provides extremely fast
+ * calculation of "line of sight from the player", and to calculate
+ * the "field of torch lite", which, again, once calculated, provides
+ * extremely fast calculation of "which grids are lit by the player's
+ * lite source". In addition to marking grids as "GRID_VIEW" and/or
+ * "GRID_LITE", as appropriate, these functions maintain an array for
+ * each of these two flags, each array containing the locations of all
+ * of the grids marked with the appropriate flag, which can be used to
+ * very quickly scan through all of the grids in a given set.
+ *
+ * To allow more "semantically valid" field of view semantics, whenever
+ * the field of view (or the set of torch lit grids) changes, all of the
+ * grids in the field of view (or the set of torch lit grids) are "drawn"
+ * so that changes in the world will become apparent as soon as possible.
+ * This has been optimized so that only grids which actually "change" are
+ * redrawn, using the "temp" array and the "GRID_TEMP" flag to keep track
+ * of the grids which are entering or leaving the relevent set of grids.
+ *
+ * These new methods are so efficient that the old nasty code was removed.
+ *
+ * Note that there is no reason to "update" the "viewable space" unless
+ * the player "moves", or walls/doors are created/destroyed, and there
+ * is no reason to "update" the "torch lit grids" unless the field of
+ * view changes, or the "light radius" changes. This means that when
+ * the player is resting, or digging, or doing anything that does not
+ * involve movement or changing the state of the dungeon, there is no
+ * need to update the "view" or the "lite" regions, which is nice.
+ *
+ * Note that the calls to the nasty "los()" function have been reduced
+ * to a bare minimum by the use of the new "field of view" calculations.
+ *
+ * I wouldn't be surprised if slight modifications to the "update_view()"
+ * function would allow us to determine "reverse line-of-sight" as well
+ * as "normal line-of-sight", which would allow monsters to use a more
+ * "correct" calculation to determine if they can "see" the player. For
+ * now, monsters simply "cheat" somewhat and assume that if the player
+ * has "line of sight" to the monster, then the monster can "pretend"
+ * that it has "line of sight" to the player.
+ *
+ *
+ * The "update_lite()" function maintains the "CAVE_LITE" flag for each
+ * grid and maintains an array of all "CAVE_LITE" grids.
+ *
+ * This set of grids is the complete set of all grids which are lit by
+ * the players light source, which allows the "player_can_see_bold()"
+ * function to work very quickly.
+ *
+ * Note that every "CAVE_LITE" grid is also a "CAVE_VIEW" grid, and in
+ * fact, the player (unless blind) can always "see" all grids which are
+ * marked as "CAVE_LITE", unless they are "off screen".
+ *
+ *
+ * The "update_view()" function maintains the "CAVE_VIEW" flag for each
+ * grid and maintains an array of all "CAVE_VIEW" grids.
+ *
+ * This set of grids is the complete set of all grids within line of sight
+ * of the player, allowing the "player_has_los_bold()" macro to work very
+ * quickly.
+ *
+ *
+ * The current "update_view()" algorithm uses the "CAVE_XTRA" flag as a
+ * temporary internal flag to mark those grids which are not only in view,
+ * but which are also "easily" in line of sight of the player. This flag
+ * is always cleared when we are done.
+ *
+ *
+ * The current "update_lite()" and "update_view()" algorithms use the
+ * "CAVE_TEMP" flag, and the array of grids which are marked as "CAVE_TEMP",
+ * to keep track of which grids were previously marked as "CAVE_LITE" or
+ * "CAVE_VIEW", which allows us to optimize the "screen updates".
+ *
+ * The "CAVE_TEMP" flag, and the array of "CAVE_TEMP" grids, is also used
+ * for various other purposes, such as spreading lite or darkness during
+ * "lite_room()" / "unlite_room()", and for calculating monster flow.
+ *
+ *
+ * Any grid can be marked as "CAVE_GLOW" which means that the grid itself is
+ * in some way permanently lit. However, for the player to "see" anything
+ * in the grid, as determined by "player_can_see()", the player must not be
+ * blind, the grid must be marked as "CAVE_VIEW", and, in addition, "wall"
+ * grids, even if marked as "perma lit", are only illuminated if they touch
+ * a grid which is not a wall and is marked both "CAVE_GLOW" and "CAVE_VIEW".
+ *
+ *
+ * To simplify various things, a grid may be marked as "CAVE_MARK", meaning
+ * that even if the player cannot "see" the grid, he "knows" the terrain in
+ * that grid. This is used to "remember" walls/doors/stairs/floors when they
+ * are "seen" or "detected", and also to "memorize" floors, after "wiz_lite()",
+ * or when one of the "memorize floor grids" options induces memorization.
+ *
+ * Objects are "memorized" in a different way, using a special "marked" flag
+ * on the object itself, which is set when an object is observed or detected.
+ *
+ *
+ * A grid may be marked as "CAVE_ROOM" which means that it is part of a "room",
+ * and should be illuminated by "lite room" and "darkness" spells.
+ *
+ *
+ * A grid may be marked as "CAVE_ICKY" which means it is part of a "vault",
+ * and should be unavailable for "teleportation" destinations.
+ *
+ *
+ * The "view_perma_grids" allows the player to "memorize" every perma-lit grid
+ * which is observed, and the "view_torch_grids" allows the player to memorize
+ * every torch-lit grid. The player will always memorize important walls,
+ * doors, stairs, and other terrain features, as well as any "detected" grids.
+ *
+ * Note that the new "update_view()" method allows, among other things, a room
+ * to be "partially" seen as the player approaches it, with a growing cone of
+ * floor appearing as the player gets closer to the door. Also, by not turning
+ * on the "memorize perma-lit grids" option, the player will only "see" those
+ * floor grids which are actually in line of sight.
+ *
+ * And my favorite "plus" is that you can now use a special option to draw the
+ * "floors" in the "viewable region" brightly (actually, to draw the *other*
+ * grids dimly), providing a "pretty" effect as the player runs around, and
+ * to efficiently display the "torch lite" in a special color.
+ *
+ *
+ * Some comments on the "update_view()" algorithm...
+ *
+ * The algorithm is very fast, since it spreads "obvious" grids very quickly,
+ * and only has to call "los()" on the borderline cases. The major axes/diags
+ * even terminate early when they hit walls. I need to find a quick way
+ * to "terminate" the other scans.
+ *
+ * Note that in the worst case (a big empty area with say 5% scattered walls),
+ * each of the 1500 or so nearby grids is checked once, most of them getting
+ * an "instant" rating, and only a small portion requiring a call to "los()".
+ *
+ * The only time that the algorithm appears to be "noticeably" too slow is
+ * when running, and this is usually only important in town, since the town
+ * provides about the worst scenario possible, with large open regions and
+ * a few scattered obstructions. There is a special "efficiency" option to
+ * allow the player to reduce his field of view in town, if needed.
+ *
+ * In the "best" case (say, a normal stretch of corridor), the algorithm
+ * makes one check for each viewable grid, and makes no calls to "los()".
+ * So running in corridors is very fast, and if a lot of monsters are
+ * nearby, it is much faster than the old methods.
+ *
+ * Note that resting, most normal commands, and several forms of running,
+ * plus all commands executed near large groups of monsters, are strictly
+ * more efficient with "update_view()" that with the old "compute los() on
+ * demand" method, primarily because once the "field of view" has been
+ * calculated, it does not have to be recalculated until the player moves
+ * (or a wall or door is created or destroyed).
+ *
+ * Note that we no longer have to do as many "los()" checks, since once the
+ * "view" region has been built, very few things cause it to be "changed"
+ * (player movement, and the opening/closing of doors, changes in wall status).
+ * Note that door/wall changes are only relevant when the door/wall itself is
+ * in the "view" region.
+ *
+ * The algorithm seems to only call "los()" from zero to ten times, usually
+ * only when coming down a corridor into a room, or standing in a room, just
+ * misaligned with a corridor. So if, say, there are five "nearby" monsters,
+ * we will be reducing the calls to "los()".
+ *
+ * I am thinking in terms of an algorithm that "walks" from the central point
+ * out to the maximal "distance", at each point, determining the "view" code
+ * (above). For each grid not on a major axis or diagonal, the "view" code
+ * depends on the "cave_los_bold()" and "view" of exactly two other grids
+ * (the one along the nearest diagonal, and the one next to that one, see
+ * "update_view_aux()"...).
+ *
+ * We "memorize" the viewable space array, so that at the cost of under 3000
+ * bytes, we reduce the time taken by "forget_view()" to one assignment for
+ * each grid actually in the "viewable space". And for another 3000 bytes,
+ * we prevent "erase + redraw" ineffiencies via the "seen" set. These bytes
+ * are also used by other routines, thus reducing the cost to almost nothing.
+ *
+ * A similar thing is done for "forget_lite()" in which case the savings are
+ * much less, but save us from doing bizarre maintenance checking.
+ *
+ * In the worst "normal" case (in the middle of the town), the reachable space
+ * actually reaches to more than half of the largest possible "circle" of view,
+ * or about 800 grids, and in the worse case (in the middle of a dungeon level
+ * where all the walls have been removed), the reachable space actually reaches
+ * the theoretical maximum size of just under 1500 grids.
+ *
+ * Each grid G examines the "state" of two (?) other (adjacent) grids, G1 & G2.
+ * If G1 is lite, G is lite. Else if G2 is lite, G is half. Else if G1 and G2
+ * are both half, G is half. Else G is dark. It only takes 2 (or 4) bits to
+ * "name" a grid, so (for MAX_RAD of 20) we could use 1600 bytes, and scan the
+ * entire possible space (including initialization) in one step per grid. If
+ * we do the "clearing" as a separate step (and use an array of "view" grids),
+ * then the clearing will take as many steps as grids that were viewed, and the
+ * algorithm will be able to "stop" scanning at various points.
+ * Oh, and outside of the "torch radius", only "lite" grids need to be scanned.
+ */
+
+/*
+ * Mega-Hack -- Delayed visual update
+ * Only used if update_view(), update_lite() or update_mon_lite() was called
+ */
+void delayed_visual_update(void)
+{
+ int i;
+ POSITION y, x;
+ grid_type *g_ptr;
+
+ /* Update needed grids */
+ for (i = 0; i < current_floor_ptr->redraw_n; i++)
+ {
+ y = current_floor_ptr->redraw_y[i];
+ x = current_floor_ptr->redraw_x[i];
+ g_ptr = ¤t_floor_ptr->grid_array[y][x];
+
+ /* Update only needed grids (prevent multiple updating) */
+ if (!(g_ptr->info & CAVE_REDRAW)) continue;
+
+ /* If required, note */
+ if (g_ptr->info & CAVE_NOTE) note_spot(y, x);
+
+ lite_spot(y, x);
+
+ /* Hack -- Visual update of monster on this grid */
+ if (g_ptr->m_idx) update_monster(g_ptr->m_idx, FALSE);
+
+ /* No longer in the array */
+ g_ptr->info &= ~(CAVE_NOTE | CAVE_REDRAW);
+ }
+
+ /* None left */
+ current_floor_ptr->redraw_n = 0;
+}
+
+
+/*
+ * Hack -- forget the "flow" information
+ */
+void forget_flow(void)
+{
+ POSITION x, y;
+
+ /* Check the entire dungeon */
+ for (y = 0; y < current_floor_ptr->height; y++)
+ {
+ for (x = 0; x < current_floor_ptr->width; x++)
+ {
+ /* Forget the old data */
+ current_floor_ptr->grid_array[y][x].dist = 0;
+ current_floor_ptr->grid_array[y][x].cost = 0;
+ current_floor_ptr->grid_array[y][x].when = 0;
+ }
+ }
+}
+
+
+/*
+ * Hack - speed up the update_flow algorithm by only doing
+ * it everytime the player moves out of LOS of the last
+ * "way-point".
+ */
+static POSITION flow_x = 0;
+static POSITION flow_y = 0;
+
+
+
+/*
+ * Hack -- fill in the "cost" field of every grid that the player
+ * can "reach" with the number of steps needed to reach that grid.
+ * This also yields the "distance" of the player from every grid.
+ *
+ * In addition, mark the "when" of the grids that can reach
+ * the player with the incremented value of "flow_n".
+ *
+ * Hack -- use the "seen" array as a "circular queue".
+ *
+ * We do not need a priority queue because the cost from grid
+ * to grid is always "one" and we process them in order.
+ */
+void update_flow(void)
+{
+ POSITION x, y;
+ DIRECTION d;
+ int flow_head = 1;
+ int flow_tail = 0;
+
+ /* Paranoia -- make sure the array is empty */
+ if (tmp_pos.n) return;
+
+ /* The last way-point is on the map */
+ if (running && in_bounds(flow_y, flow_x))
+ {
+ /* The way point is in sight - do not update. (Speedup) */
+ if (current_floor_ptr->grid_array[flow_y][flow_x].info & CAVE_VIEW) return;
+ }
+
+ /* Erase all of the current flow information */
+ for (y = 0; y < current_floor_ptr->height; y++)
+ {
+ for (x = 0; x < current_floor_ptr->width; x++)
+ {
+ current_floor_ptr->grid_array[y][x].cost = 0;
+ current_floor_ptr->grid_array[y][x].dist = 0;
+ }
+ }
+
+ /* Save player position */
+ flow_y = p_ptr->y;
+ flow_x = p_ptr->x;
+
+ /* Add the player's grid to the queue */
+ tmp_pos.y[0] = p_ptr->y;
+ tmp_pos.x[0] = p_ptr->x;
+
+ /* Now process the queue */
+ while (flow_head != flow_tail)
+ {
+ int ty, tx;
+
+ /* Extract the next entry */
+ ty = tmp_pos.y[flow_tail];
+ tx = tmp_pos.x[flow_tail];
+
+ /* Forget that entry */
+ if (++flow_tail == TEMP_MAX) flow_tail = 0;
+
+ /* Add the "children" */
+ for (d = 0; d < 8; d++)
+ {
+ int old_head = flow_head;
+ byte_hack m = current_floor_ptr->grid_array[ty][tx].cost + 1;
+ byte_hack n = current_floor_ptr->grid_array[ty][tx].dist + 1;
+ grid_type *g_ptr;
+
+ /* Child location */
+ y = ty + ddy_ddd[d];
+ x = tx + ddx_ddd[d];
+
+ /* Ignore player's grid */
+ if (player_bold(y, x)) continue;
+
+ g_ptr = ¤t_floor_ptr->grid_array[y][x];
+
+ if (is_closed_door(g_ptr->feat)) m += 3;
+
+ /* Ignore "pre-stamped" entries */
+ if (g_ptr->dist != 0 && g_ptr->dist <= n && g_ptr->cost <= m) continue;
+
+ /* Ignore "walls" and "rubble" */
+ if (!cave_have_flag_grid(g_ptr, FF_MOVE) && !is_closed_door(g_ptr->feat)) continue;
+
+ /* Save the flow cost */
+ if (g_ptr->cost == 0 || g_ptr->cost > m) g_ptr->cost = m;
+ if (g_ptr->dist == 0 || g_ptr->dist > n) g_ptr->dist = n;
+
+ /* Hack -- limit flow depth */
+ if (n == MONSTER_FLOW_DEPTH) continue;
+
+ /* Enqueue that entry */
+ tmp_pos.y[flow_head] = y;
+ tmp_pos.x[flow_head] = x;
+
+ /* Advance the queue */
+ if (++flow_head == TEMP_MAX) flow_head = 0;
+
+ /* Hack -- notice overflow by forgetting new entry */
+ if (flow_head == flow_tail) flow_head = old_head;
+ }
+ }
+}
+
+
+static int scent_when = 0;
+
+/*
+ * Characters leave scent trails for perceptive monsters to track.
+ *
+ * Smell is rather more limited than sound. Many creatures cannot use
+ * it at all, it doesn't extend very far outwards from the character's
+ * current position, and monsters can use it to home in the character,
+ * but not to run away from him.
+ *
+ * Smell is valued according to age. When a character takes his current_world_ptr->game_turn,
+ * scent is aged by one, and new scent of the current age is laid down.
+ * Speedy characters leave more scent, true, but it also ages faster,
+ * which makes it harder to hunt them down.
+ *
+ * Whenever the age count loops, most of the scent trail is erased and
+ * the age of the remainder is recalculated.
+ */
+void update_smell(void)
+{
+ POSITION i, j;
+ POSITION y, x;
+
+ /* Create a table that controls the spread of scent */
+ const int scent_adjust[5][5] =
+ {
+ { -1, 0, 0, 0,-1 },
+ { 0, 1, 1, 1, 0 },
+ { 0, 1, 2, 1, 0 },
+ { 0, 1, 1, 1, 0 },
+ { -1, 0, 0, 0,-1 },
+ };
+
+ /* Loop the age and adjust scent values when necessary */
+ if (++scent_when == 254)
+ {
+ /* Scan the entire dungeon */
+ for (y = 0; y < current_floor_ptr->height; y++)
+ {
+ for (x = 0; x < current_floor_ptr->width; x++)
+ {
+ int w = current_floor_ptr->grid_array[y][x].when;
+ current_floor_ptr->grid_array[y][x].when = (w > 128) ? (w - 128) : 0;
+ }
+ }
+
+ /* Restart */
+ scent_when = 126;
+ }
+
+
+ /* Lay down new scent */
+ for (i = 0; i < 5; i++)
+ {
+ for (j = 0; j < 5; j++)
+ {
+ grid_type *g_ptr;
+
+ /* Translate table to map grids */
+ y = i + p_ptr->y - 2;
+ x = j + p_ptr->x - 2;
+
+ /* Check Bounds */
+ if (!in_bounds(y, x)) continue;
+
+ g_ptr = ¤t_floor_ptr->grid_array[y][x];
+
+ /* Walls, water, and lava cannot hold scent. */
+ if (!cave_have_flag_grid(g_ptr, FF_MOVE) && !is_closed_door(g_ptr->feat)) continue;
+
+ /* Grid must not be blocked by walls from the character */
+ if (!player_has_los_bold(y, x)) continue;
+
+ /* Note grids that are too far away */
+ if (scent_adjust[i][j] == -1) continue;
+
+ /* Mark the grid with new scent */
+ g_ptr->when = scent_when + scent_adjust[i][j];
+ }
+ }
+}
+
+
+
+/*
+ * Change the "feat" flag for a grid, and notice/redraw the grid
+ */
+void cave_set_feat(POSITION y, POSITION x, FEAT_IDX feat)
+{
+ grid_type *g_ptr = ¤t_floor_ptr->grid_array[y][x];
+ feature_type *f_ptr = &f_info[feat];
+ bool old_los, old_mirror;
+
+ if (!character_dungeon)
+ {
+ /* Clear mimic type */
+ g_ptr->mimic = 0;
+
+ /* Change the feature */
+ g_ptr->feat = feat;
+
+ /* Hack -- glow the GLOW terrain */
+ if (have_flag(f_ptr->flags, FF_GLOW) && !(d_info[p_ptr->dungeon_idx].flags1 & DF1_DARKNESS))
+ {
+ DIRECTION i;
+ POSITION yy, xx;
+
+ for (i = 0; i < 9; i++)
+ {
+ yy = y + ddy_ddd[i];
+ xx = x + ddx_ddd[i];
+ if (!in_bounds2(yy, xx)) continue;
+ current_floor_ptr->grid_array[yy][xx].info |= CAVE_GLOW;
+ }
+ }
+
+ return;
+ }
+
+ old_los = cave_have_flag_bold(y, x, FF_LOS);
+ old_mirror = is_mirror_grid(g_ptr);
+
+ /* Clear mimic type */
+ g_ptr->mimic = 0;
+
+ /* Change the feature */
+ g_ptr->feat = feat;
+
+ /* Remove flag for mirror/glyph */
+ g_ptr->info &= ~(CAVE_OBJECT);
+
+ if (old_mirror && (d_info[p_ptr->dungeon_idx].flags1 & DF1_DARKNESS))
+ {
+ g_ptr->info &= ~(CAVE_GLOW);
+ if (!view_torch_grids) g_ptr->info &= ~(CAVE_MARK);
+
+ update_local_illumination(y, x);
+ }
+
+ /* Check for change to boring grid */
+ if (!have_flag(f_ptr->flags, FF_REMEMBER)) g_ptr->info &= ~(CAVE_MARK);
+ if (g_ptr->m_idx) update_monster(g_ptr->m_idx, FALSE);
+
+ note_spot(y, x);
+ lite_spot(y, x);
+
+ /* Check if los has changed */
+ if (old_los ^ have_flag(f_ptr->flags, FF_LOS))
+ {
+
+#ifdef COMPLEX_WALL_ILLUMINATION /* COMPLEX_WALL_ILLUMINATION */
+
+ update_local_illumination(y, x);
+
+#endif /* COMPLEX_WALL_ILLUMINATION */
+
+ /* Update the visuals */
+ p_ptr->update |= (PU_VIEW | PU_LITE | PU_MON_LITE | PU_MONSTERS);
+ }
+
+ /* Hack -- glow the GLOW terrain */
+ if (have_flag(f_ptr->flags, FF_GLOW) && !(d_info[p_ptr->dungeon_idx].flags1 & DF1_DARKNESS))
+ {
+ DIRECTION i;
+ POSITION yy, xx;
+ grid_type *cc_ptr;
+
+ for (i = 0; i < 9; i++)
+ {
+ yy = y + ddy_ddd[i];
+ xx = x + ddx_ddd[i];
+ if (!in_bounds2(yy, xx)) continue;
+ cc_ptr = ¤t_floor_ptr->grid_array[yy][xx];
+ cc_ptr->info |= CAVE_GLOW;
+
+ if (player_has_los_grid(cc_ptr))
+ {
+ if (cc_ptr->m_idx) update_monster(cc_ptr->m_idx, FALSE);
+
+ note_spot(yy, xx);
+
+ lite_spot(yy, xx);
+ }
+
+ update_local_illumination(yy, xx);
+ }
+
+ if (p_ptr->special_defense & NINJA_S_STEALTH)
+ {
+ if (current_floor_ptr->grid_array[p_ptr->y][p_ptr->x].info & CAVE_GLOW) set_superstealth(FALSE);
+ }
+ }
+}
+
+
+FEAT_IDX conv_dungeon_feat(FEAT_IDX newfeat)
+{
+ feature_type *f_ptr = &f_info[newfeat];
+
+ if (have_flag(f_ptr->flags, FF_CONVERT))
+ {
+ switch (f_ptr->subtype)
+ {
+ case CONVERT_TYPE_FLOOR:
+ return feat_ground_type[randint0(100)];
+ case CONVERT_TYPE_WALL:
+ return feat_wall_type[randint0(100)];
+ case CONVERT_TYPE_INNER:
+ return feat_wall_inner;
+ case CONVERT_TYPE_OUTER:
+ return feat_wall_outer;
+ case CONVERT_TYPE_SOLID:
+ return feat_wall_solid;
+ case CONVERT_TYPE_STREAM1:
+ return d_info[p_ptr->dungeon_idx].stream1;
+ case CONVERT_TYPE_STREAM2:
+ return d_info[p_ptr->dungeon_idx].stream2;
+ default:
+ return newfeat;
+ }
+ }
+ else return newfeat;
+}
+
+
+/*
+ * Take a feature, determine what that feature becomes
+ * through applying the given action.
+ */
+FEAT_IDX feat_state(FEAT_IDX feat, int action)
+{
+ feature_type *f_ptr = &f_info[feat];
+ int i;
+
+ /* Get the new feature */
+ for (i = 0; i < MAX_FEAT_STATES; i++)
+ {
+ if (f_ptr->state[i].action == action) return conv_dungeon_feat(f_ptr->state[i].result);
+ }
+
+ if (have_flag(f_ptr->flags, FF_PERMANENT)) return feat;
+
+ return (feature_action_flags[action] & FAF_DESTROY) ? conv_dungeon_feat(f_ptr->destroyed) : feat;
+}
+
+/*
+ * Takes a location and action and changes the feature at that
+ * location through applying the given action.
+ */
+void cave_alter_feat(POSITION y, POSITION x, int action)
+{
+ /* Set old feature */
+ FEAT_IDX oldfeat = current_floor_ptr->grid_array[y][x].feat;
+
+ /* Get the new feat */
+ FEAT_IDX newfeat = feat_state(oldfeat, action);
+
+ /* No change */
+ if (newfeat == oldfeat) return;
+
+ /* Set the new feature */
+ cave_set_feat(y, x, newfeat);
+
+ if (!(feature_action_flags[action] & FAF_NO_DROP))
+ {
+ feature_type *old_f_ptr = &f_info[oldfeat];
+ feature_type *f_ptr = &f_info[newfeat];
+ bool found = FALSE;
+
+ /* Handle gold */
+ if (have_flag(old_f_ptr->flags, FF_HAS_GOLD) && !have_flag(f_ptr->flags, FF_HAS_GOLD))
+ {
+ /* Place some gold */
+ place_gold(y, x);
+ found = TRUE;
+ }
+
+ /* Handle item */
+ if (have_flag(old_f_ptr->flags, FF_HAS_ITEM) && !have_flag(f_ptr->flags, FF_HAS_ITEM) && (randint0(100) < (15 - current_floor_ptr->dun_level / 2)))
+ {
+ /* Place object */
+ place_object(y, x, 0L);
+ found = TRUE;
+ }
+
+ if (found && character_dungeon && player_can_see_bold(y, x))
+ {
+ msg_print(_("何かを発見した！", "You have found something!"));
+ }
+ }
+
+ if (feature_action_flags[action] & FAF_CRASH_GLASS)
+ {
+ feature_type *old_f_ptr = &f_info[oldfeat];
+
+ if (have_flag(old_f_ptr->flags, FF_GLASS) && character_dungeon)
+ {
+ project(PROJECT_WHO_GLASS_SHARDS, 1, y, x, MIN(current_floor_ptr->dun_level, 100) / 4, GF_SHARDS,
+ (PROJECT_GRID | PROJECT_ITEM | PROJECT_KILL | PROJECT_HIDE | PROJECT_JUMP | PROJECT_NO_HANGEKI), -1);
+ }
+ }
+}
+
+
+/* Remove a mirror */
+void remove_mirror(POSITION y, POSITION x)
+{
+ grid_type *g_ptr = ¤t_floor_ptr->grid_array[y][x];
+
+ /* Remove the mirror */
+ g_ptr->info &= ~(CAVE_OBJECT);
+ g_ptr->mimic = 0;
+
+ if (d_info[p_ptr->dungeon_idx].flags1 & DF1_DARKNESS)
+ {
+ g_ptr->info &= ~(CAVE_GLOW);
+ if (!view_torch_grids) g_ptr->info &= ~(CAVE_MARK);
+ if (g_ptr->m_idx) update_monster(g_ptr->m_idx, FALSE);
+
+ update_local_illumination(y, x);
+ }
+
+ note_spot(y, x);
+
+ lite_spot(y, x);
+}
+
+
+/*
+ * Return TRUE if there is a mirror on the grid.
+ */
+bool is_mirror_grid(grid_type *g_ptr)
+{
+ if ((g_ptr->info & CAVE_OBJECT) && have_flag(f_info[g_ptr->mimic].flags, FF_MIRROR))
+ return TRUE;
+ else
+ return FALSE;
+}
+
+
+/*
+ * Return TRUE if there is a mirror on the grid.
+ */
+bool is_glyph_grid(grid_type *g_ptr)
+{
+ if ((g_ptr->info & CAVE_OBJECT) && have_flag(f_info[g_ptr->mimic].flags, FF_GLYPH))
+ return TRUE;
+ else
+ return FALSE;
+}
+
+
+/*
+ * Return TRUE if there is a mirror on the grid.
+ */
+bool is_explosive_rune_grid(grid_type *g_ptr)
+{
+ if ((g_ptr->info & CAVE_OBJECT) && have_flag(f_info[g_ptr->mimic].flags, FF_MINOR_GLYPH))
+ return TRUE;
+ else
+ return FALSE;
+}
+
+
+/*
+ * Track a new monster
+ */
+void health_track(MONSTER_IDX m_idx)
+{
+ /* Mount monster is already tracked */
+ if (m_idx && m_idx == p_ptr->riding) return;
+
+ /* Track a new guy */
+ p_ptr->health_who = m_idx;
+
+ /* Redraw (later) */
+ p_ptr->redraw |= (PR_HEALTH);
+}
+
+
+
+/*
+ * Hack -- track the given monster race
+ */
+void monster_race_track(MONRACE_IDX r_idx)
+{
+ /* Save this monster ID */
+ p_ptr->monster_race_idx = r_idx;
+
+ p_ptr->window |= (PW_MONSTER);
+}
+
+
+
+/*
+ * Hack -- track the given object kind
+ */
+void object_kind_track(KIND_OBJECT_IDX k_idx)
+{
+ /* Save this monster ID */
+ p_ptr->object_kind_idx = k_idx;
+
+ p_ptr->window |= (PW_OBJECT);
+}
+
+
+/*!
+* @brief 指定されたマスがモンスターのテレポート可能先かどうかを判定する。
+* @param m_idx モンスターID
+* @param y 移動先Y座標
+* @param x 移動先X座標
+* @param mode オプション
+* @return テレポート先として妥当ならばtrue
+*/
+bool cave_monster_teleportable_bold(MONSTER_IDX m_idx, POSITION y, POSITION x, BIT_FLAGS mode)
+{
+ monster_type *m_ptr = ¤t_floor_ptr->m_list[m_idx];
+ grid_type *g_ptr = ¤t_floor_ptr->grid_array[y][x];
+ feature_type *f_ptr = &f_info[g_ptr->feat];
+
+ /* Require "teleportable" space */
+ if (!have_flag(f_ptr->flags, FF_TELEPORTABLE)) return FALSE;
+
+ if (g_ptr->m_idx && (g_ptr->m_idx != m_idx)) return FALSE;
+ if (player_bold(y, x)) return FALSE;
+
+ /* Hack -- no teleport onto glyph of warding */
+ if (is_glyph_grid(g_ptr)) return FALSE;
+ if (is_explosive_rune_grid(g_ptr)) return FALSE;
+
+ if (!(mode & TELEPORT_PASSIVE))
+ {
+ if (!monster_can_cross_terrain(g_ptr->feat, &r_info[m_ptr->r_idx], 0)) return FALSE;
+ }
+
+ return TRUE;
+}
+
+/*!
+* @brief 指定されたマスにプレイヤーがテレポート可能かどうかを判定する。
+* @param y 移動先Y座標
+* @param x 移動先X座標
+* @param mode オプション
+* @return テレポート先として妥当ならばtrue
+*/
+bool cave_player_teleportable_bold(POSITION y, POSITION x, BIT_FLAGS mode)
+{
+ grid_type *g_ptr = ¤t_floor_ptr->grid_array[y][x];
+ feature_type *f_ptr = &f_info[g_ptr->feat];
+
+ /* Require "teleportable" space */
+ if (!have_flag(f_ptr->flags, FF_TELEPORTABLE)) return FALSE;
+
+ /* No magical teleporting into vaults and such */
+ if (!(mode & TELEPORT_NONMAGICAL) && (g_ptr->info & CAVE_ICKY)) return FALSE;
+
+ if (g_ptr->m_idx && (g_ptr->m_idx != p_ptr->riding)) return FALSE;
+
+ /* don't teleport on a trap. */
+ if (have_flag(f_ptr->flags, FF_HIT_TRAP)) return FALSE;
+
+ if (!(mode & TELEPORT_PASSIVE))
+ {
+ if (!player_can_enter(g_ptr->feat, 0)) return FALSE;
+
+ if (have_flag(f_ptr->flags, FF_WATER) && have_flag(f_ptr->flags, FF_DEEP))
+ {
+ if (!p_ptr->levitation && !p_ptr->can_swim) return FALSE;
+ }
+
+ if (have_flag(f_ptr->flags, FF_LAVA) && !p_ptr->immune_fire && !IS_INVULN())
+ {
+ /* Always forbid deep lava */
+ if (have_flag(f_ptr->flags, FF_DEEP)) return FALSE;
+
+ /* Forbid shallow lava when the player don't have levitation */
+ if (!p_ptr->levitation) return FALSE;
+ }
+
+ }
+
+ return TRUE;
+}
+
+/*!
+ * @brief 地形は開くものであって、かつ開かれているかを返す /
+ * Attempt to open the given chest at the given location
+ * @param feat 地形ID
+ * @return 開いた地形である場合TRUEを返す / Return TRUE if the given feature is an open door
+ */
+bool is_open(FEAT_IDX feat)
+{
+ return have_flag(f_info[feat].flags, FF_CLOSE) && (feat != feat_state(feat, FF_CLOSE));
+}
+
+/*!
+ * @brief プレイヤーが地形踏破可能かを返す
+ * @param feature 判定したい地形ID
+ * @param mode 移動に関するオプションフラグ
+ * @return 移動可能ならばTRUEを返す
+ */
+bool player_can_enter(FEAT_IDX feature, BIT_FLAGS16 mode)
+{
+ feature_type *f_ptr = &f_info[feature];
+
+ if (p_ptr->riding) return monster_can_cross_terrain(feature, &r_info[current_floor_ptr->m_list[p_ptr->riding].r_idx], mode | CEM_RIDING);
+
+ if (have_flag(f_ptr->flags, FF_PATTERN))
+ {
+ if (!(mode & CEM_P_CAN_ENTER_PATTERN)) return FALSE;
+ }
+
+ if (have_flag(f_ptr->flags, FF_CAN_FLY) && p_ptr->levitation) return TRUE;
+ if (have_flag(f_ptr->flags, FF_CAN_SWIM) && p_ptr->can_swim) return TRUE;
+ if (have_flag(f_ptr->flags, FF_CAN_PASS) && p_ptr->pass_wall) return TRUE;
+
+ if (!have_flag(f_ptr->flags, FF_MOVE)) return FALSE;
+
+ return TRUE;
+}
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