/*
* Strictly check if monster can enter the grid
*/
bool monster_can_enter(int y, int x, monster_race *r_ptr, u16b mode)
{
cave_type *c_ptr = &cave[y][x];
/* Player or other monster */
if (player_bold(y, x)) return FALSE;
if (c_ptr->m_idx) return FALSE;
return monster_can_cross_terrain(c_ptr->feat, r_ptr, mode);
}
/*
* Places "streamers" of rock through dungeon
*
* Note that their are actually six different terrain features used
* to represent streamers. Three each of magma and quartz, one for
* basic vein, one with hidden gold, and one with known gold. The
* hidden gold types are currently unused.
*/
void build_streamer(int feat, int chance)
{
int i, tx, ty;
int y, x, dir;
int dummy = 0;
cave_type *c_ptr;
feature_type *f_ptr;
feature_type *streamer_ptr = &f_info[feat];
bool streamer_is_wall = have_flag(streamer_ptr->flags, FF_WALL) && !have_flag(streamer_ptr->flags, FF_PERMANENT);
bool streamer_may_have_gold = have_flag(streamer_ptr->flags, FF_MAY_HAVE_GOLD);
/* Hack -- Choose starting point */
y = rand_spread(cur_hgt / 2, cur_hgt / 6);
x = rand_spread(cur_wid / 2, cur_wid / 6);
/* Choose a random compass direction */
dir = ddd[randint0(8)];
/* Place streamer into dungeon */
while (dummy < SAFE_MAX_ATTEMPTS)
{
dummy++;
/* One grid per density */
for (i = 0; i < DUN_STR_DEN; i++)
{
int d = DUN_STR_RNG;
/* Pick a nearby grid */
while (1)
{
ty = rand_spread(y, d);
tx = rand_spread(x, d);
if (!in_bounds2(ty, tx)) continue;
break;
}
/* Access the grid */
c_ptr = &cave[ty][tx];
f_ptr = &f_info[c_ptr->feat];
if (have_flag(f_ptr->flags, FF_MOVE) && (have_flag(f_ptr->flags, FF_WATER) || have_flag(f_ptr->flags, FF_LAVA)))
continue;
/* Do not convert permanent features */
if (have_flag(f_ptr->flags, FF_PERMANENT)) continue;
/* Only convert "granite" walls */
if (streamer_is_wall)
{
if (!is_extra_grid(c_ptr) && !is_inner_grid(c_ptr) && !is_outer_grid(c_ptr) && !is_solid_grid(c_ptr)) continue;
if (is_closed_door(c_ptr->feat)) continue;
}
if (c_ptr->m_idx && !(have_flag(streamer_ptr->flags, FF_PLACE) && monster_can_cross_terrain(feat, &r_info[m_list[c_ptr->m_idx].r_idx], 0)))
{
/* Delete the monster (if any) */
delete_monster(ty, tx);
}
if (c_ptr->o_idx && !have_flag(streamer_ptr->flags, FF_DROP))
{
s16b this_o_idx, next_o_idx = 0;
/* Scan all objects in the grid */
for (this_o_idx = c_ptr->o_idx; this_o_idx; this_o_idx = next_o_idx)
{
/* Acquire object */
object_type *o_ptr = &o_list[this_o_idx];
/* Acquire next object */
next_o_idx = o_ptr->next_o_idx;
/* Hack -- Preserve unknown artifacts */
if (object_is_fixed_artifact(o_ptr))
{
/* Mega-Hack -- Preserve the artifact */
a_info[o_ptr->name1].cur_num = 0;
if (cheat_peek)
{
char o_name[MAX_NLEN];
object_desc(o_name, o_ptr, (OD_NAME_ONLY | OD_STORE));
msg_format("Artifact (%s) was deleted by streamer.", o_name);
}
}
else if (o_ptr->name3)
{
/* Mega-Hack -- Preserve the artifact */
a_info[o_ptr->name3].cur_num = 0;
if (cheat_peek)
{
char o_name[MAX_NLEN];
object_desc(o_name, o_ptr, (OD_NAME_ONLY | OD_STORE));
msg_format("Artifact (%s) was deleted by streamer.", o_name);
}
}
else if (cheat_peek && o_ptr->art_name)
{
msg_print("One of the random artifacts was deleted by streamer.");
}
}
/* Delete objects */
delete_object(ty, tx);
}
/* Clear previous contents, add proper vein type */
c_ptr->feat = feat;
/* Paranoia: Clear mimic field */
c_ptr->mimic = 0;
if (streamer_may_have_gold)
{
/* Hack -- Add some known treasure */
if (one_in_(chance))
{
cave_alter_feat(ty, tx, FF_MAY_HAVE_GOLD);
}
/* Hack -- Add some hidden treasure */
else if (one_in_(chance / 4))
{
cave_alter_feat(ty, tx, FF_MAY_HAVE_GOLD);
cave_alter_feat(ty, tx, FF_ENSECRET);
}
}
}
if (dummy >= SAFE_MAX_ATTEMPTS)
{
if (cheat_room)
{
msg_print("Warning! Could not place streamer!");
}
return;
}
/* Advance the streamer */
y += ddy[dir];
x += ddx[dir];
/* Quit before leaving the dungeon */
if (!in_bounds(y, x)) break;
}
}
