/**
* Hit a trap.
*/
extern void hit_trap(int y, int x)
{
bool ident;
struct trap *trap;
struct effect *effect;
/* Count the hidden traps here */
int num = num_traps(cave, y, x, -1);
/* Oops. We've walked right into trouble. */
if (num == 1) msg("You stumble upon a trap!");
else if (num > 1) msg("You stumble upon some traps!");
/* Look at the traps in this grid */
for (trap = cave->squares[y][x].trap; trap; trap = trap->next) {
/* Require that trap be capable of affecting the character */
if (!trf_has(trap->kind->flags, TRF_TRAP)) continue;
/* Disturb the player */
disturb(player, 0);
/* Fire off the trap */
effect = trap->kind->effect;
effect_do(effect, &ident, FALSE, 0, 0, 0);
/* Trap becomes visible (always XXX) */
trf_on(trap->flags, TRF_VISIBLE);
sqinfo_on(cave->squares[y][x].info, SQUARE_MARK);
}
/* Verify traps (remove marker if appropriate) */
(void)square_verify_trap(cave, y, x, 0);
}
/*
* Handle player hitting a real trap
*/
void hit_trap(int y, int x)
{
bool ident;
struct feature *trap = &f_info[cave->feat[y][x]];
/* Disturb the player */
disturb(p_ptr, 0, 0);
/* Run the effect */
effect_do(trap->effect, &ident, FALSE, 0, 0, 0);
}
/**
* Process a monster spell
*
* \param index is the monster spell flag (RSF_FOO)
* \param mon is the attacking monster
* \param seen is whether the player can see the monster at this moment
*/
void do_mon_spell(int index, struct monster *mon, bool seen)
{
char m_name[80];
bool ident, hits = FALSE;
/* Extract the monster level */
int rlev = ((mon->race->level >= 1) ? mon->race->level : 1);
const struct monster_spell *spell = monster_spell_by_index(index);
/* Get the monster name (or "it") */
monster_desc(m_name, sizeof(m_name), mon, MDESC_STANDARD);
/* See if it hits */
if (spell->hit == 100)
hits = TRUE;
else if (spell->hit == 0)
hits = FALSE;
else
hits = check_hit(player, spell->hit, rlev);
/* Tell the player what's going on */
disturb(player, 1);
spell_message(mon, spell, seen, hits);
if (!hits) return;
/* Try a saving throw if available */
if (spell->save_message &&
randint0(100) < player->state.skills[SKILL_SAVE]) {
msg("%s", spell->save_message);
return;
}
/* Do effects */
effect_do(spell->effect, NULL, &ident, TRUE, 0, 0, 0);
return;
}
/*
* Use an object the right way.
*
* There may be a BIG problem with any "effect" that can cause "changes"
* to the inventory. For example, a "scroll of recharging" can cause
* a wand/staff to "disappear", moving the inventory up. Luckily, the
* scrolls all appear BEFORE the staffs/wands, so this is not a problem.
* But, for example, a "staff of recharging" could cause MAJOR problems.
* In such a case, it will be best to either (1) "postpone" the effect
* until the end of the function, or (2) "change" the effect, say, into
* giving a staff "negative" charges, or "turning a staff into a stick".
* It seems as though a "rod of recharging" might in fact cause problems.
* The basic problem is that the act of recharging (and destroying) an
* item causes the inducer of that action to "move", causing "o_ptr" to
* no longer point at the correct item, with horrifying results.
*/
void do_cmd_use(cmd_code code, cmd_arg args[])
{
int item = args[0].item;
object_type *o_ptr = object_from_item_idx(item);
int effect;
bool ident = FALSE, used = FALSE;
bool was_aware = object_flavor_is_aware(o_ptr);
int dir = 5;
int px = p_ptr->px, py = p_ptr->py;
int snd, boost, level;
use_type use;
int items_allowed = 0;
/* Determine how this item is used. */
if (obj_is_rod(o_ptr))
{
if (!obj_can_zap(o_ptr))
{
msg("That rod is still charging.");
return;
}
use = USE_TIMEOUT;
snd = MSG_ZAP_ROD;
items_allowed = USE_INVEN | USE_FLOOR;
}
else if (obj_is_wand(o_ptr))
{
if (!obj_has_charges(o_ptr))
{
msg("That wand has no charges.");
return;
}
use = USE_CHARGE;
snd = MSG_ZAP_ROD;
items_allowed = USE_INVEN | USE_FLOOR;
}
else if (obj_is_staff(o_ptr))
{
if (!obj_has_charges(o_ptr))
{
msg("That staff has no charges.");
return;
}
use = USE_CHARGE;
snd = MSG_USE_STAFF;
items_allowed = USE_INVEN | USE_FLOOR;
}
else if (obj_is_food(o_ptr))
{
use = USE_SINGLE;
snd = MSG_EAT;
items_allowed = USE_INVEN | USE_FLOOR;
}
else if (obj_is_potion(o_ptr))
{
use = USE_SINGLE;
snd = MSG_QUAFF;
items_allowed = USE_INVEN | USE_FLOOR;
}
else if (obj_is_scroll(o_ptr))
{
/* Check player can use scroll */
if (!player_can_read())
return;
use = USE_SINGLE;
snd = MSG_GENERIC;
items_allowed = USE_INVEN | USE_FLOOR;
}
else if (obj_is_activatable(o_ptr))
{
if (!obj_can_activate(o_ptr))
{
msg("That item is still charging.");
return;
}
use = USE_TIMEOUT;
snd = MSG_ACT_ARTIFACT;
items_allowed = USE_EQUIP;
}
else
{
msg("The item cannot be used at the moment");
}
/* Check if item is within player's reach. */
if (items_allowed == 0 || !item_is_available(item, NULL, items_allowed))
{
msg("You cannot use that item from its current location.");
return;
}
/* track the object used */
track_object(item);
/* Figure out effect to use */
effect = object_effect(o_ptr);
/* If the item requires a direction, get one (allow cancelling) */
if (obj_needs_aim(o_ptr))
dir = args[1].direction;
/* Check for use if necessary, and execute the effect */
if ((use != USE_CHARGE && use != USE_TIMEOUT) || check_devices(o_ptr))
{
int beam = beam_chance(o_ptr->tval);
/* Special message for artifacts */
if (o_ptr->artifact)
{
msgt(snd, "You activate it.");
if (o_ptr->artifact->effect_msg)
activation_message(o_ptr, o_ptr->artifact->effect_msg);
level = o_ptr->artifact->level;
}
else
{
/* Make a noise! */
sound(snd);
level = o_ptr->kind->level;
}
/* A bit of a hack to make ID work better.
-- Check for "obvious" effects beforehand. */
if (effect_obvious(effect)) object_flavor_aware(o_ptr);
/* Boost damage effects if skill > difficulty */
boost = MAX(p_ptr->state.skills[SKILL_DEVICE] - level, 0);
/* Do effect */
used = effect_do(effect, &ident, was_aware, dir, beam, boost);
/* Quit if the item wasn't used and no knowledge was gained */
if (!used && (was_aware || !ident)) return;
}
/* If the item is a null pointer or has been wiped, be done now */
if (!o_ptr || !o_ptr->kind) return;
if (ident) object_notice_effect(o_ptr);
/* Food feeds the player */
if (o_ptr->tval == TV_FOOD || o_ptr->tval == TV_POTION)
(void)set_food(p_ptr->food + o_ptr->pval[DEFAULT_PVAL]);
/* Use the turn */
p_ptr->energy_use = 100;
/* Mark as tried and redisplay */
p_ptr->notice |= (PN_COMBINE | PN_REORDER);
p_ptr->redraw |= (PR_INVEN | PR_EQUIP | PR_OBJECT);
/*
* If the player becomes aware of the item's function, then mark it as
* aware and reward the player with some experience. Otherwise, mark
* it as "tried".
*/
if (ident && !was_aware)
{
/* Object level */
int lev = o_ptr->kind->level;
object_flavor_aware(o_ptr);
if (o_ptr->tval == TV_ROD) object_notice_everything(o_ptr);
player_exp_gain(p_ptr, (lev + (p_ptr->lev / 2)) / p_ptr->lev);
p_ptr->notice |= PN_SQUELCH;
}
else if (used)
{
object_flavor_tried(o_ptr);
}
/* If there are no more of the item left, then we're done. */
if (!o_ptr->number) return;
/* Chargeables act differently to single-used items when not used up */
if (used && use == USE_CHARGE)
{
/* Use a single charge */
o_ptr->pval[DEFAULT_PVAL]--;
/* Describe charges */
if (item >= 0)
inven_item_charges(item);
else
floor_item_charges(0 - item);
}
else if (used && use == USE_TIMEOUT)
{
/* Artifacts use their own special field */
if (o_ptr->artifact)
o_ptr->timeout = randcalc(o_ptr->artifact->time, 0, RANDOMISE);
else
o_ptr->timeout += randcalc(o_ptr->kind->time, 0, RANDOMISE);
}
else if (used && use == USE_SINGLE)
{
/* Destroy a potion in the pack */
if (item >= 0)
{
inven_item_increase(item, -1);
inven_item_describe(item);
inven_item_optimize(item);
}
/* Destroy a potion on the floor */
else
{
floor_item_increase(0 - item, -1);
floor_item_describe(0 - item);
floor_item_optimize(0 - item);
}
}
/* Hack to make Glyph of Warding work properly */
if (cave->feat[py][px] == FEAT_GLYPH)
{
/* Push objects off the grid */
if (cave->o_idx[py][px]) push_object(py, px);
}
}
/**
* Hit a trap.
*/
extern void hit_trap(int y, int x)
{
bool ident = false;
struct trap *trap;
struct effect *effect;
/* Count the hidden traps here */
int num = num_traps(cave, y, x, -1);
/* The player is safe from all traps */
if (player_is_trapsafe(player)) return;
/* Oops. We've walked right into trouble. */
if (num == 1) msg("You stumble upon a trap!");
else if (num > 1) msg("You stumble upon some traps!");
/* Look at the traps in this grid */
for (trap = square_trap(cave, y, x); trap; trap = trap->next) {
int flag;
bool saved = false;
/* Require that trap be capable of affecting the character */
if (!trf_has(trap->kind->flags, TRF_TRAP)) continue;
if (trap->timeout) continue;
/* Disturb the player */
disturb(player, 0);
/* Give a message */
if (trap->kind->msg)
msg(trap->kind->msg);
/* Test for save due to flag */
for (flag = of_next(trap->kind->save_flags, FLAG_START);
flag != FLAG_END;
flag = of_next(trap->kind->save_flags, flag + 1))
if (player_of_has(player, flag)) {
saved = true;
equip_learn_flag(player, flag);
}
/* Test for save due to armor */
if (trf_has(trap->kind->flags, TRF_SAVE_ARMOR) && !trap_check_hit(125))
saved = true;
/* Test for save due to saving throw */
if (trf_has(trap->kind->flags, TRF_SAVE_THROW) &&
(randint0(100) < player->state.skills[SKILL_SAVE]))
saved = true;
/* Save, or fire off the trap */
if (saved) {
if (trap->kind->msg_good)
msg(trap->kind->msg_good);
} else {
if (trap->kind->msg_bad)
msg(trap->kind->msg_bad);
effect = trap->kind->effect;
effect_do(effect, source_trap(trap), NULL, &ident, false, 0, 0, 0);
/* Do any extra effects */
if (trap->kind->effect_xtra && one_in_(2)) {
if (trap->kind->msg_xtra)
msg(trap->kind->msg_xtra);
effect = trap->kind->effect_xtra;
effect_do(effect, source_trap(trap), NULL, &ident, false, 0, 0, 0);
}
}
/* Some traps drop you a dungeon level */
if (trf_has(trap->kind->flags, TRF_DOWN))
dungeon_change_level(player,
dungeon_get_next_level(player->depth, 1));
/* Some traps drop you onto them */
if (trf_has(trap->kind->flags, TRF_PIT))
monster_swap(player->py, player->px, trap->fy, trap->fx);
/* Some traps disappear after activating, all have a chance to */
if (trf_has(trap->kind->flags, TRF_ONETIME) || one_in_(3)) {
square_destroy_trap(cave, y, x);
square_forget(cave, y, x);
}
/* Trap may have gone */
if (!square_trap(cave, y, x)) break;
/* Trap becomes visible (always XXX) */
trf_on(trap->flags, TRF_VISIBLE);
square_memorize(cave, y, x);
}
/* Verify traps (remove marker if appropriate) */
(void)square_verify_trap(cave, y, x, 0);
}
