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player-attack.c
1445 lines (1222 loc) · 39.5 KB
/
player-attack.c
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/**
* \file player-attack.c
* \brief Attacks (both throwing and melee) by the player
*
* Copyright (c) 1997 Ben Harrison, James E. Wilson, Robert A. Koeneke
*
* This work is free software; you can redistribute it and/or modify it
* under the terms of either:
*
* a) the GNU General Public License as published by the Free Software
* Foundation, version 2, or
*
* b) the "Angband licence":
* This software may be copied and distributed for educational, research,
* and not for profit purposes provided that this copyright and statement
* are included in all such copies. Other copyrights may also apply.
*/
#include "angband.h"
#include "cave.h"
#include "cmds.h"
#include "effects.h"
#include "game-event.h"
#include "game-input.h"
#include "generate.h"
#include "init.h"
#include "mon-desc.h"
#include "mon-lore.h"
#include "mon-make.h"
#include "mon-msg.h"
#include "mon-predicate.h"
#include "mon-timed.h"
#include "mon-util.h"
#include "monster.h"
#include "obj-desc.h"
#include "obj-gear.h"
#include "obj-knowledge.h"
#include "obj-pile.h"
#include "obj-slays.h"
#include "obj-tval.h"
#include "obj-util.h"
#include "player-attack.h"
#include "player-calcs.h"
#include "player-timed.h"
#include "player-util.h"
#include "project.h"
#include "target.h"
/**
* ------------------------------------------------------------------------
* Hit and breakage calculations
* ------------------------------------------------------------------------ */
/**
* Returns percent chance of an object breaking after throwing or shooting.
*
* Artifacts will never break.
*
* Beyond that, each item kind has a percent chance to break (0-100). When the
* object hits its target this chance is used.
*
* When an object misses it also has a chance to break. This is determined by
* squaring the normaly breakage probability. So an item that breaks 100% of
* the time on hit will also break 100% of the time on a miss, whereas a 50%
* hit-breakage chance gives a 25% miss-breakage chance, and a 10% hit breakage
* chance gives a 1% miss-breakage chance.
*/
int breakage_chance(const struct object *obj, bool hit_target) {
int perc = obj->kind->base->break_perc;
if (obj->artifact) return 0;
if (of_has(obj->flags, OF_THROWING) &&
!of_has(obj->flags, OF_EXPLODE) &&
!tval_is_ammo(obj)) {
perc = 1;
}
if (!hit_target) return (perc * perc) / 100;
return perc;
}
/**
* Calculate the player's base melee to-hit value without regard to a specific
* monster.
* See also: chance_of_missile_hit_base
*
* \param p The player
* \param weapon The player's weapon
*/
int chance_of_melee_hit_base(const struct player *p,
const struct object *weapon)
{
int bonus = p->state.to_h + (weapon ? object_to_hit(weapon) : 0);
return p->state.skills[SKILL_TO_HIT_MELEE] + bonus * BTH_PLUS_ADJ;
}
/**
* Calculate the player's melee to-hit value against a specific monster.
* See also: chance_of_missile_hit
*
* \param p The player
* \param weapon The player's weapon
* \param mon The monster
*/
static int chance_of_melee_hit(const struct player *p,
const struct object *weapon, const struct monster *mon)
{
int chance = chance_of_melee_hit_base(p, weapon);
/* Non-visible targets have a to-hit penalty of 50% */
return monster_is_visible(mon) ? chance : chance / 2;
}
/**
* Calculate the player's base missile to-hit value without regard to a specific
* monster.
* See also: chance_of_melee_hit_base
*
* \param p The player
* \param missile The missile to launch
* \param launcher The launcher to use (optional)
*/
int chance_of_missile_hit_base(const struct player *p,
const struct object *missile,
const struct object *launcher)
{
int bonus = object_to_hit(missile);
int chance;
if (!launcher) {
/* Other thrown objects are easier to use, but only throwing weapons
* take advantage of bonuses to Skill and Deadliness from other
* equipped items. */
if (of_has(missile->flags, OF_THROWING)) {
bonus += p->state.to_h;
chance = p->state.skills[SKILL_TO_HIT_THROW] + bonus * BTH_PLUS_ADJ;
} else {
chance = 3 * p->state.skills[SKILL_TO_HIT_THROW] / 2
+ bonus * BTH_PLUS_ADJ;
}
} else {
bonus += p->state.to_h + object_to_hit(launcher);
chance = p->state.skills[SKILL_TO_HIT_BOW] + bonus * BTH_PLUS_ADJ;
}
return chance;
}
/**
* Calculate the player's missile to-hit value against a specific monster.
* See also: chance_of_melee_hit
*
* \param p The player
* \param missile The missile to launch
* \param launcher Optional launcher to use (thrown weapons use no launcher)
* \param mon The monster
*/
static int chance_of_missile_hit(const struct player *p,
const struct object *missile, const struct object *launcher,
const struct monster *mon)
{
int chance = chance_of_missile_hit_base(p, missile, launcher);
/* Penalize for distance */
chance -= distance(p->grid, mon->grid);
/* Non-visible targets have a to-hit penalty of 50% */
return monster_is_obvious(mon) ? chance : chance / 2;
}
/**
* Determine if a hit roll is successful against the target AC.
* See also: hit_chance
*
* \param to_hit To total to-hit value to use
* \param ac The AC to roll against
*/
bool test_hit(int to_hit, int ac)
{
random_chance c;
hit_chance(&c, to_hit, ac);
return random_chance_check(c);
}
/**
* Return a random_chance by reference, which represents the likelihood of a
* hit roll succeeding for the given to_hit and ac values. The hit calculation
* will:
*
* Always hit 12% of the time
* Always miss 5% of the time
* Put a floor of 9 on the to-hit value
* Roll between 0 and the to-hit value
* The outcome must be >= AC*2/3 to be considered a hit
*
* \param chance The random_chance to return-by-reference
* \param to_hit The to-hit value to use
* \param ac The AC to roll against
*/
void hit_chance(random_chance *chance, int to_hit, int ac)
{
/* Percentages scaled to 10,000 to avoid rounding error */
const int HUNDRED_PCT = 10000;
const int ALWAYS_HIT = 1200;
const int ALWAYS_MISS = 500;
/* Put a floor on the to_hit */
to_hit = MAX(9, to_hit);
/* Calculate the hit percentage */
chance->numerator = MAX(0, to_hit - ac * 2 / 3);
chance->denominator = to_hit;
/* Convert the ratio to a scaled percentage */
chance->numerator = HUNDRED_PCT * chance->numerator / chance->denominator;
chance->denominator = HUNDRED_PCT;
/* The calculated rate only applies when the guaranteed hit/miss don't */
chance->numerator = chance->numerator *
(HUNDRED_PCT - ALWAYS_MISS - ALWAYS_HIT) / HUNDRED_PCT;
/* Add in the guaranteed hit */
chance->numerator += ALWAYS_HIT;
}
/**
* ------------------------------------------------------------------------
* Damage calculations
* ------------------------------------------------------------------------ */
/**
* Conversion of plusses to Deadliness to a percentage added to damage.
* Much of this table is not intended ever to be used, and is included
* only to handle possible inflation elsewhere. -LM-
*/
uint8_t deadliness_conversion[151] =
{
0,
5, 10, 14, 18, 22, 26, 30, 33, 36, 39,
42, 45, 48, 51, 54, 57, 60, 63, 66, 69,
72, 75, 78, 81, 84, 87, 90, 93, 96, 99,
102, 104, 107, 109, 112, 114, 117, 119, 122, 124,
127, 129, 132, 134, 137, 139, 142, 144, 147, 149,
152, 154, 157, 159, 162, 164, 167, 169, 172, 174,
176, 178, 180, 182, 184, 186, 188, 190, 192, 194,
196, 198, 200, 202, 204, 206, 208, 210, 212, 214,
216, 218, 220, 222, 224, 226, 228, 230, 232, 234,
236, 238, 240, 242, 244, 246, 248, 250, 251, 253,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255
};
/**
* Deadliness multiplies the damage done by a percentage, which varies
* from 0% (no damage done at all) to at most 355% (damage is multiplied
* by more than three and a half times!).
*
* We use the table "deadliness_conversion" to translate internal plusses
* to deadliness to percentage values.
*
* This function multiplies damage by 100.
*/
void apply_deadliness(int *die_average, int deadliness)
{
int i;
/* Paranoia - ensure legal table access. */
if (deadliness > 150)
deadliness = 150;
if (deadliness < -150)
deadliness = -150;
/* Deadliness is positive - damage is increased */
if (deadliness >= 0) {
i = deadliness_conversion[deadliness];
*die_average *= (100 + i);
}
/* Deadliness is negative - damage is decreased */
else {
i = deadliness_conversion[ABS(deadliness)];
if (i >= 100)
*die_average = 0;
else
*die_average *= (100 - i);
}
}
/**
* Check if a monster is debuffed in such a way as to make a critical
* hit more likely.
*/
static bool is_debuffed(const struct monster *monster)
{
return monster->m_timed[MON_TMD_CONF] > 0 ||
monster->m_timed[MON_TMD_HOLD] > 0 ||
monster->m_timed[MON_TMD_FEAR] > 0 ||
monster->m_timed[MON_TMD_STUN] > 0;
}
/**
* Determine damage for critical hits from shooting.
*
* Factor in item weight, total plusses, and player level.
*/
static int critical_shot(const struct player *p,
const struct monster *monster,
int weight, int plus,
int dam, bool launched, uint32_t *msg_type)
{
int to_h = p->state.to_h + plus;
int chance, new_dam;
if (is_debuffed(monster)) {
to_h += z_info->r_crit_debuff_toh;
}
chance = z_info->r_crit_chance_weight_scl * weight
+ z_info->r_crit_chance_toh_scl * to_h
+ z_info->r_crit_chance_level_scl * p->lev
+ z_info->r_crit_chance_offset;
if (launched) {
chance += z_info->r_crit_chance_launched_toh_skill_scl
* p->state.skills[SKILL_TO_HIT_BOW];
} else {
chance += z_info->r_crit_chance_thrown_toh_skill_scl
* p->state.skills[SKILL_TO_HIT_THROW];
}
if (randint1(z_info->r_crit_chance_range) > chance
|| !z_info->r_crit_level_head) {
*msg_type = MSG_SHOOT_HIT;
new_dam = dam;
} else {
int power = z_info->r_crit_power_weight_scl * weight
+ randint1(z_info->r_crit_power_random);
const struct critical_level *this_l = z_info->r_crit_level_head;
while (power >= this_l->cutoff && this_l->next) {
this_l = this_l->next;
}
*msg_type = this_l->msgt;
new_dam = this_l->add + this_l->mult * dam;
}
return new_dam;
}
/**
* Determine O-combat damage for critical hits from shooting.
*/
static int o_critical_shot(const struct player *p,
const struct monster *monster,
const struct object *missile,
const struct object *launcher,
uint32_t *msg_type)
{
int power = chance_of_missile_hit_base(p, missile, launcher);
int chance_num, chance_den, add_dice;
if (is_debuffed(monster)) {
power += z_info->o_r_crit_debuff_toh;
}
/* Apply a rational scale factor. */
if (launcher) {
power = (power * z_info->o_r_crit_power_launched_toh_scl_num)
/ z_info->o_r_crit_power_launched_toh_scl_den;
} else {
power = (power * z_info->o_r_crit_power_thrown_toh_scl_num)
/ z_info->o_r_crit_power_thrown_toh_scl_den;
}
/* Test for critical hit: chance is a * power / (b * power + c) */
chance_num = power * z_info->o_r_crit_chance_power_scl_num;
chance_den = power * z_info->o_r_crit_chance_power_scl_den
+ z_info->o_r_crit_chance_add_den;
if (randint1(chance_den) <= chance_num && z_info->o_r_crit_level_head) {
/* Determine level of critical hit. */
const struct o_critical_level *this_l =
z_info->o_r_crit_level_head;
while (this_l->next && !one_in_(this_l->chance)) {
this_l = this_l->next;
}
add_dice = this_l->added_dice;
*msg_type = this_l->msgt;
} else {
add_dice = 0;
*msg_type = MSG_SHOOT_HIT;
}
return add_dice;
}
/**
* Determine damage for critical hits from melee.
*
* Factor in weapon weight, total plusses, player level.
*/
static int critical_melee(const struct player *p,
const struct monster *monster,
int weight, int plus,
int dam, uint32_t *msg_type)
{
int to_h = p->state.to_h + plus;
int chance, new_dam;
if (is_debuffed(monster)) {
to_h += z_info->m_crit_debuff_toh;
}
chance = z_info->m_crit_chance_weight_scl * weight
+ z_info->m_crit_chance_toh_scl * to_h
+ z_info->m_crit_chance_level_scl * p->lev
+ z_info->m_crit_chance_toh_skill_scl
* p->state.skills[SKILL_TO_HIT_MELEE]
+ z_info->m_crit_chance_offset;
if (randint1(z_info->m_crit_chance_range) > chance
|| !z_info->m_crit_level_head) {
*msg_type = MSG_HIT;
new_dam = dam;
} else {
int power = z_info->m_crit_power_weight_scl * weight
+ randint1(z_info->m_crit_power_random);
const struct critical_level *this_l = z_info->m_crit_level_head;
while (power >= this_l->cutoff && this_l->next) {
this_l = this_l->next;
}
*msg_type = this_l->msgt;
new_dam = this_l->add + this_l->mult * dam;
}
return new_dam;
}
/**
* Determine O-combat damage for critical hits from melee.
*/
static int o_critical_melee(const struct player *p,
const struct monster *monster,
const struct object *obj, uint32_t *msg_type)
{
int power = chance_of_melee_hit_base(p, obj);
int chance_num, chance_den, add_dice;
if (is_debuffed(monster)) {
power += z_info->o_m_crit_debuff_toh;
}
/* Apply a rational scale factor. */
power = (power * z_info->o_m_crit_power_toh_scl_num)
/ z_info->o_m_crit_power_toh_scl_den;
/* Test for critical hit: chance is a * power / (b * power + c) */
chance_num = power * z_info->o_m_crit_chance_power_scl_num;
chance_den = power * z_info->o_m_crit_chance_power_scl_den
+ z_info->o_m_crit_chance_add_den;
if (randint1(chance_den) <= chance_num && z_info->o_m_crit_level_head) {
/* Determine level of critical hit. */
const struct o_critical_level *this_l =
z_info->o_m_crit_level_head;
while (this_l->next && !one_in_(this_l->chance)) {
this_l = this_l->next;
}
add_dice = this_l->added_dice;
*msg_type = this_l->msgt;
} else {
add_dice = 0;
*msg_type = MSG_SHOOT_HIT;
}
return add_dice;
}
/**
* Determine standard melee damage.
*
* Factor in damage dice, to-dam and any brand or slay.
*/
static int melee_damage(const struct monster *mon, struct object *obj, int b, int s)
{
int dmg = (obj) ? damroll(obj->dd, obj->ds) : 1;
if (s) {
dmg *= slays[s].multiplier;
} else if (b) {
dmg *= get_monster_brand_multiplier(mon, &brands[b], false);
}
if (obj) dmg += object_to_dam(obj);
return dmg;
}
/**
* Determine O-combat melee damage.
*
* Deadliness and any brand or slay add extra sides to the damage dice,
* criticals add extra dice.
*/
static int o_melee_damage(struct player *p, const struct monster *mon,
struct object *obj, int b, int s, uint32_t *msg_type)
{
int dice = (obj) ? obj->dd : 1;
int sides, deadliness, dmg, add = 0;
bool extra;
/* Get the average value of a single damage die. (x10) */
int die_average = (10 * (((obj) ? obj->ds : 1) + 1)) / 2;
/* Adjust the average for slays and brands. (10x inflation) */
if (s) {
die_average *= slays[s].o_multiplier;
add = slays[s].o_multiplier - 10;
} else if (b) {
int bmult = get_monster_brand_multiplier(mon, &brands[b], true);
die_average *= bmult;
add = bmult - 10;
} else {
die_average *= 10;
}
/* Apply deadliness to average. (100x inflation) */
deadliness = p->state.to_d + ((obj) ? object_to_dam(obj) : 0);
apply_deadliness(&die_average, MIN(deadliness, 150));
/* Calculate the actual number of sides to each die. */
sides = (2 * die_average) - 10000;
extra = randint0(10000) < (sides % 10000);
sides /= 10000;
sides += (extra ? 1 : 0);
/*
* Get number of critical dice; for now, excluding criticals for
* unarmed combat
*/
if (obj) dice += o_critical_melee(p, mon, obj, msg_type);
/* Roll out the damage. */
dmg = damroll(dice, sides);
/* Apply any special additions to damage. */
dmg += add;
return dmg;
}
/**
* Determine standard ranged damage.
*
* Factor in damage dice, to-dam, multiplier and any brand or slay.
*/
static int ranged_damage(struct player *p, const struct monster *mon,
struct object *missile, struct object *launcher,
int b, int s)
{
int dmg;
int mult = (launcher ? p->state.ammo_mult : 1);
/* If we have a slay or brand, modify the multiplier appropriately */
if (b) {
mult += get_monster_brand_multiplier(mon, &brands[b], false);
} else if (s) {
mult += slays[s].multiplier;
}
/* Apply damage: multiplier, slays, bonuses */
dmg = damroll(missile->dd, missile->ds);
dmg += object_to_dam(missile);
if (launcher) {
dmg += object_to_dam(launcher);
} else if (of_has(missile->flags, OF_THROWING)) {
/* Adjust damage for throwing weapons.
* This is not the prettiest equation, but it does at least try to
* keep throwing weapons competitive. */
dmg *= 2 + object_weight_one(missile) / 12;
}
dmg *= mult;
return dmg;
}
/**
* Determine O-combat ranged damage.
*
* Deadliness, launcher multiplier and any brand or slay add extra sides to the
* damage dice, criticals add extra dice.
*/
static int o_ranged_damage(struct player *p, const struct monster *mon,
struct object *missile, struct object *launcher,
int b, int s, uint32_t *msg_type)
{
int mult = (launcher ? p->state.ammo_mult : 1);
int dice = missile->dd;
int sides, deadliness, dmg, add = 0;
bool extra;
/* Get the average value of a single damage die. (x10) */
int die_average = (10 * (missile->ds + 1)) / 2;
/* Apply the launcher multiplier. */
die_average *= mult;
/* Adjust the average for slays and brands. (10x inflation) */
if (b) {
int bmult = get_monster_brand_multiplier(mon, &brands[b], true);
die_average *= bmult;
add = bmult - 10;
} else if (s) {
die_average *= slays[s].o_multiplier;
add = slays[s].o_multiplier - 10;
} else {
die_average *= 10;
}
/* Apply deadliness to average. (100x inflation) */
deadliness = object_to_dam(missile);
if (launcher) {
deadliness += object_to_dam(launcher) + p->state.to_d;
} else if (of_has(missile->flags, OF_THROWING)) {
deadliness += p->state.to_d;
}
apply_deadliness(&die_average, MIN(deadliness, 150));
/* Calculate the actual number of sides to each die. */
sides = (2 * die_average) - 10000;
extra = randint0(10000) < (sides % 10000);
sides /= 10000;
sides += (extra ? 1 : 0);
/* Get number of critical dice - only for suitable objects */
if (launcher) {
dice += o_critical_shot(p, mon, missile, launcher, msg_type);
} else if (of_has(missile->flags, OF_THROWING)) {
dice += o_critical_shot(p, mon, missile, NULL, msg_type);
/* Multiply the number of damage dice by the throwing weapon
* multiplier. This is not the prettiest equation,
* but it does at least try to keep throwing weapons competitive. */
dice *= 2 + object_weight_one(missile) / 12;
}
/* Roll out the damage. */
dmg = damroll(dice, sides);
/* Apply any special additions to damage. */
dmg += add;
return dmg;
}
/**
* Apply the player damage bonuses
*/
static int player_damage_bonus(struct player_state *state)
{
return state->to_d;
}
/**
* ------------------------------------------------------------------------
* Non-damage melee blow effects
* ------------------------------------------------------------------------ */
/**
* Apply blow side effects
*/
static void blow_side_effects(struct player *p, struct monster *mon)
{
/* Confusion attack */
if (p->timed[TMD_ATT_CONF]) {
player_clear_timed(p, TMD_ATT_CONF, true, false);
mon_inc_timed(mon, MON_TMD_CONF, (10 + randint0(p->lev) / 10),
MON_TMD_FLG_NOTIFY);
}
}
/**
* Apply blow after effects
*/
static bool blow_after_effects(struct loc grid, int dmg, int splash,
bool *fear, bool quake)
{
/* Apply earthquake brand */
if (quake) {
effect_simple(EF_EARTHQUAKE, source_player(), "0", 0, 10, 0, 0, 0,
NULL);
/* Monster may be dead or moved */
if (!square_monster(cave, grid))
return true;
}
return false;
}
/**
* ------------------------------------------------------------------------
* Melee attack
* ------------------------------------------------------------------------ */
/* Melee and throwing hit types */
static const struct hit_types melee_hit_types[] = {
{ MSG_MISS, NULL },
{ MSG_HIT, NULL },
{ MSG_HIT_GOOD, "It was a good hit!" },
{ MSG_HIT_GREAT, "It was a great hit!" },
{ MSG_HIT_SUPERB, "It was a superb hit!" },
{ MSG_HIT_HI_GREAT, "It was a *GREAT* hit!" },
{ MSG_HIT_HI_SUPERB, "It was a *SUPERB* hit!" },
};
/**
* Attack the monster at the given location with a single blow.
*/
bool py_attack_real(struct player *p, struct loc grid, bool *fear)
{
size_t i;
/* Information about the target of the attack */
struct monster *mon = square_monster(cave, grid);
char m_name[80];
bool stop = false;
/* The weapon used */
struct object *obj = equipped_item_by_slot_name(p, "weapon");
/* Information about the attack */
int drain = 0;
int splash = 0;
bool do_quake = false;
bool success = false;
char verb[20];
uint32_t msg_type = MSG_HIT;
int j, b, s, weight, dmg;
/* Default to punching */
my_strcpy(verb, "punch", sizeof(verb));
/* Extract monster name (or "it") */
monster_desc(m_name, sizeof(m_name), mon, MDESC_TARG);
/* Auto-Recall and track if possible and visible */
if (monster_is_visible(mon)) {
monster_race_track(p->upkeep, mon->race);
health_track(p->upkeep, mon);
}
/* Handle player fear (only for invisible monsters) */
if (player_of_has(p, OF_AFRAID)) {
equip_learn_flag(p, OF_AFRAID);
msgt(MSG_AFRAID, "You are too afraid to attack %s!", m_name);
return false;
}
/* Disturb the monster */
monster_wake(mon, false, 100);
mon_clear_timed(mon, MON_TMD_HOLD, MON_TMD_FLG_NOTIFY);
/* See if the player hit */
success = test_hit(chance_of_melee_hit(p, obj, mon), mon->race->ac);
/* If a miss, skip this hit */
if (!success) {
msgt(MSG_MISS, "You miss %s.", m_name);
/* Small chance of bloodlust side-effects */
if (p->timed[TMD_BLOODLUST] && one_in_(50)) {
msg("You feel strange...");
player_over_exert(p, PY_EXERT_SCRAMBLE, 20, 20);
}
return false;
}
if (obj) {
/* Handle normal weapon */
weight = object_weight_one(obj);
my_strcpy(verb, "hit", sizeof(verb));
} else {
weight = 0;
}
/* Best attack from all slays or brands on all non-launcher equipment */
b = 0;
s = 0;
for (j = 2; j < p->body.count; j++) {
struct object *obj_local = slot_object(p, j);
if (obj_local)
improve_attack_modifier(p, obj_local, mon, &b, &s,
verb, false);
}
/* Get the best attack from all slays or brands - weapon or temporary */
if (obj) {
improve_attack_modifier(p, obj, mon, &b, &s, verb, false);
}
improve_attack_modifier(p, NULL, mon, &b, &s, verb, false);
/* Get the damage */
if (!OPT(p, birth_percent_damage)) {
dmg = melee_damage(mon, obj, b, s);
/* For now, exclude criticals on unarmed combat */
if (obj) {
dmg = critical_melee(p, mon, weight, object_to_hit(obj),
dmg, &msg_type);
}
} else {
dmg = o_melee_damage(p, mon, obj, b, s, &msg_type);
}
/* Splash damage and earthquakes */
splash = (weight * dmg) / 100;
if (player_of_has(p, OF_IMPACT) && dmg > 50) {
do_quake = true;
equip_learn_flag(p, OF_IMPACT);
}
/* Learn by use */
equip_learn_on_melee_attack(p);
learn_brand_slay_from_melee(p, obj, mon);
/* Apply the player damage bonuses */
if (!OPT(p, birth_percent_damage)) {
dmg += player_damage_bonus(&p->state);
}
/* Substitute shape-specific blows for shapechanged players */
if (player_is_shapechanged(p)) {
int choice = randint0(p->shape->num_blows);
struct player_blow *blow = p->shape->blows;
while (choice--) {
blow = blow->next;
}
my_strcpy(verb, blow->name, sizeof(verb));
}
/* No negative damage; change verb if no damage done */
if (dmg <= 0) {
dmg = 0;
msg_type = MSG_MISS;
my_strcpy(verb, "fail to harm", sizeof(verb));
}
for (i = 0; i < N_ELEMENTS(melee_hit_types); i++) {
const char *dmg_text = "";
if (msg_type != melee_hit_types[i].msg_type)
continue;
if (OPT(p, show_damage))
dmg_text = format(" (%d)", dmg);
if (melee_hit_types[i].text)
msgt(msg_type, "You %s %s%s. %s", verb, m_name, dmg_text,
melee_hit_types[i].text);
else
msgt(msg_type, "You %s %s%s.", verb, m_name, dmg_text);
}
/* Pre-damage side effects */
blow_side_effects(p, mon);
/* Damage, check for hp drain, fear and death */
drain = MIN(mon->hp, dmg);
stop = mon_take_hit(mon, p, dmg, fear, NULL);
/* Small chance of bloodlust side-effects */
if (p->timed[TMD_BLOODLUST] && one_in_(50)) {
msg("You feel something give way!");
player_over_exert(p, PY_EXERT_CON, 20, 0);
}
if (!stop) {
if (p->timed[TMD_ATT_VAMP] && monster_is_living(mon)) {
effect_simple(EF_HEAL_HP, source_player(), format("%d", drain),
0, 0, 0, 0, 0, NULL);
}
}
if (stop)
(*fear) = false;
/* Post-damage effects */
if (blow_after_effects(grid, dmg, splash, fear, do_quake))
stop = true;
return stop;
}
/**
* Attempt a shield bash; return true if the monster dies
*/
static bool attempt_shield_bash(struct player *p, struct monster *mon, bool *fear)
{
struct object *weapon = slot_object(p, slot_by_name(p, "weapon"));
struct object *shield = slot_object(p, slot_by_name(p, "arm"));
int nblows = p->state.num_blows / 100;
int bash_quality, bash_dam, energy_lost;
/* Bashing chance depends on melee skill, DEX, and a level bonus. */
int bash_chance = p->state.skills[SKILL_TO_HIT_MELEE] / 8 +
adj_dex_th[p->state.stat_ind[STAT_DEX]] / 2;
/* No shield, no bash */
if (!shield) return false;
/* Monster is too pathetic, don't bother */
if (mon->race->level < p->lev / 2) return false;
/* Players bash more often when they see a real need: */
if (!equipped_item_by_slot_name(p, "weapon")) {
/* Unarmed... */
bash_chance *= 4;
} else if (weapon->dd * weapon->ds * nblows < shield->dd * shield->ds * 3) {
/* ... or armed with a puny weapon */
bash_chance *= 2;
}
/* Try to get in a shield bash. */
if (bash_chance <= randint0(200 + mon->race->level)) {
return false;
}
/* Calculate attack quality, a mix of momentum and accuracy. */
bash_quality = p->state.skills[SKILL_TO_HIT_MELEE] / 4 + p->wt / 8 +
p->upkeep->total_weight / 80 + object_weight_one(shield) / 2;
/* Calculate damage. Big shields are deadly. */
bash_dam = damroll(shield->dd, shield->ds);
/* Multiply by quality and experience factors */
bash_dam *= bash_quality / 40 + p->lev / 14;
/* Strength bonus. */
bash_dam += adj_str_td[p->state.stat_ind[STAT_STR]];
/* Paranoia. */
if (bash_dam <= 0) return false;
bash_dam = MIN(bash_dam, 125);
if (OPT(p, show_damage)) {
msgt(MSG_HIT, "You get in a shield bash! (%d)", bash_dam);
} else {
msgt(MSG_HIT, "You get in a shield bash!");
}
/* Encourage the player to keep wearing that heavy shield. */
if (randint1(bash_dam) > 30 + randint1(bash_dam / 2)) {
msgt(MSG_HIT_HI_SUPERB, "WHAMM!");
}
/* Damage, check for fear and death. */
if (mon_take_hit(mon, p, bash_dam, fear, NULL)) return true;
/* Stunning. */
if (bash_quality + p->lev > randint1(200 + mon->race->level * 8)) {
mon_inc_timed(mon, MON_TMD_STUN, randint0(p->lev / 5) + 4, 0);
}
/* Confusion. */
if (bash_quality + p->lev > randint1(300 + mon->race->level * 12)) {
mon_inc_timed(mon, MON_TMD_CONF, randint0(p->lev / 5) + 4, 0);
}
/* The player will sometimes stumble. */
if (35 + adj_dex_th[p->state.stat_ind[STAT_DEX]] < randint1(60)) {
energy_lost = randint1(50) + 25;
/* Lose 26-75% of a turn due to stumbling after shield bash. */
msgt(MSG_GENERIC, "You stumble!");
p->upkeep->energy_use += energy_lost * z_info->move_energy / 100;
}
return false;
}
/**
* Attack the monster at the given location
*
* We get blows until energy drops below that required for another blow, or
* until the target monster dies. Each blow is handled by py_attack_real().
* We don't allow @ to spend more than 1 turn's worth of energy,
* to avoid slower monsters getting double moves.
*/
void py_attack(struct player *p, struct loc grid)
{
int avail_energy = MIN(p->energy, z_info->move_energy);
int blow_energy = 100 * z_info->move_energy / p->state.num_blows;
bool slain = false, fear = false;
struct monster *mon = square_monster(cave, grid);
/* Disturb the player */
disturb(p);
/* Initialize the energy used */
p->upkeep->energy_use = 0;
/* Reward BGs with 5% of max SPs, min 1/2 point */