233 lines
9.2 KiB
Rust
233 lines
9.2 KiB
Rust
use ::rltk::RandomNumberGenerator;
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use ::specs::prelude::*;
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use crate::colors;
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use crate::components::{
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Attributes, EquipmentSlot, Equipped, HungerClock, HungerState, Name, NaturalAttackDefense,
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Pools, Skill, Skills, WantsToMelee, Weapon, WeaponAttribute, Wearable,
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};
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use crate::effects::{add_effect, EffectType, Targets};
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use crate::game_log::GameLog;
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use crate::gamesystem::skill_bonus;
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pub struct MeleeCombatSystem {}
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impl<'a> System<'a> for MeleeCombatSystem {
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#[allow(clippy::type_complexity)]
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type SystemData = (
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Entities<'a>,
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WriteExpect<'a, GameLog>,
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WriteStorage<'a, WantsToMelee>,
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ReadStorage<'a, Name>,
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ReadStorage<'a, Attributes>,
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ReadStorage<'a, Skills>,
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ReadStorage<'a, HungerClock>,
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ReadStorage<'a, Pools>,
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WriteExpect<'a, RandomNumberGenerator>,
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ReadStorage<'a, Equipped>,
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ReadStorage<'a, Weapon>,
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ReadStorage<'a, Wearable>,
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ReadStorage<'a, NaturalAttackDefense>,
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);
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fn run(&mut self, data: Self::SystemData) {
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let (
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entities,
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mut log,
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mut wants_melee,
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names,
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attributes,
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skills,
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hunger_clock,
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pools,
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mut rng,
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equipped_items,
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meleeweapons,
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wearables,
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natural,
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) = data;
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for (entity, wants_melee, name, attacker_attributes, attacker_skills, attacker_pools) in (
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&entities,
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&wants_melee,
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&names,
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&attributes,
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&skills,
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&pools,
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)
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.join()
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{
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// Are the attacker and defender alive? Only attack if they are
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let target_pools = pools.get(wants_melee.target).unwrap();
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let target_attributes = attributes.get(wants_melee.target).unwrap();
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let target_skills = skills.get(wants_melee.target).unwrap();
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if attacker_pools.hit_points.current > 0 && target_pools.hit_points.current > 0 {
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let target_name = names.get(wants_melee.target).unwrap();
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// Define the basic unarmed attack -- overridden by wielding check below if a weapon is equipped
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let mut weapon_info = Weapon {
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range: None,
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attribute: WeaponAttribute::Might,
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hit_bonus: 0,
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damage_n_dice: 1,
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damage_die_type: 4,
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damage_bonus: 0,
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proc_chance: None,
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proc_target: None,
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};
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if let Some(nat) = natural.get(entity) {
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if !nat.attacks.is_empty() {
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let attack_index = if nat.attacks.len() == 1 {
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0
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} else {
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rng.roll_dice(1, nat.attacks.len() as i32) as usize - 1
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};
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let attk = &nat.attacks[attack_index];
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weapon_info.hit_bonus = attk.hit_bonus;
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weapon_info.damage_n_dice = attk.damage_n_dice;
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weapon_info.damage_die_type = attk.damage_die_type;
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weapon_info.damage_bonus = attk.damage_bonus;
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}
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}
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let mut weapon_entity: Option<Entity> = None;
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for (weaponentity, wielded, melee) in
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(&entities, &equipped_items, &meleeweapons).join()
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{
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if wielded.owner == entity && wielded.slot == EquipmentSlot::Melee {
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weapon_info = melee.clone();
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weapon_entity = Some(weaponentity);
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}
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}
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let natural_roll = rng.roll_dice(1, 20);
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let attribute_hit_bonus = if weapon_info.attribute == WeaponAttribute::Might {
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attacker_attributes.might.bonus
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} else {
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attacker_attributes.quickness.bonus
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};
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let skill_hit_bonus = skill_bonus(Skill::Melee, &*attacker_skills);
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let weapon_hit_bonus = weapon_info.hit_bonus;
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let mut status_hit_bonus = 0;
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if let Some(hc) = hunger_clock.get(entity) {
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// Well-Fed grants +1
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if hc.state == HungerState::WellFed {
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status_hit_bonus += 1;
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}
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}
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let modified_hit_roll = natural_roll
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+ attribute_hit_bonus
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+ skill_hit_bonus
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+ weapon_hit_bonus
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+ status_hit_bonus;
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let mut armor_item_bonus_f = 0.0;
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for (wielded, armor) in (&equipped_items, &wearables).join() {
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if wielded.owner == wants_melee.target {
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armor_item_bonus_f += armor.armor_class;
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}
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}
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let base_armor_class = match natural.get(wants_melee.target) {
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None => 10,
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Some(nat) => nat.armor_class.unwrap_or(10),
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};
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let armor_quickness_bonus = target_attributes.quickness.bonus;
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let armor_skill_bonus = skill_bonus(Skill::Defense, &*target_skills);
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let armor_item_bonus = armor_item_bonus_f as i32;
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let armor_class =
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base_armor_class + armor_quickness_bonus + armor_skill_bonus + armor_item_bonus;
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if natural_roll != 1 && (natural_roll == 20 || modified_hit_roll > armor_class) {
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// Target hit! Until we support weapons, we're going with 1d4
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let base_damage = rng.roll_dice(1, 4);
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let attr_damage_bonus = attacker_attributes.might.bonus;
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let skill_damage_bonus = skill_bonus(Skill::Melee, &*attacker_skills);
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let weapon_damage_bonus = weapon_info.damage_bonus;
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let damage = i32::max(
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0,
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base_damage
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+ attr_damage_bonus
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+ skill_hit_bonus
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+ skill_damage_bonus
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+ weapon_damage_bonus,
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);
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add_effect(
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Some(entity),
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EffectType::Damage { amount: damage },
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Targets::Single {
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target: wants_melee.target,
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},
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);
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log.append(format!(
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"{} hits {} for {} hp.",
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&name.name, &target_name.name, damage
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));
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// Proc effects
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if let Some(chance) = &weapon_info.proc_chance {
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if rng.roll_dice(1, 100) <= (chance * 100.0) as i32 {
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let effect_target = if weapon_info.proc_target.unwrap() == "Self" {
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Targets::Single { target: entity }
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} else {
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Targets::Single {
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target: wants_melee.target,
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}
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};
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add_effect(
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Some(entity),
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EffectType::ItemUse {
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item: weapon_entity.unwrap(),
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},
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effect_target,
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);
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}
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}
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} else if natural_roll == 1 {
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// Natural 1 miss
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log.append(format!(
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"{} considers attacking {}, but misjudges the timing.",
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name.name, target_name.name
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));
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add_effect(
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None,
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EffectType::Particle {
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glyph: rltk::to_cp437('‼'),
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fg: colors::BLUE,
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bg: colors::BLACK,
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lifespan: 200.0,
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},
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Targets::Single {
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target: wants_melee.target,
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},
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);
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} else {
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// Miss
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log.append(format!(
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"{} attacks {}, but can't connect",
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name.name, target_name.name
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));
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add_effect(
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None,
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EffectType::Particle {
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glyph: rltk::to_cp437('‼'),
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fg: colors::CYAN,
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bg: colors::BLACK,
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lifespan: 200.0,
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},
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Targets::Single {
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target: wants_melee.target,
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},
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);
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}
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}
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}
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wants_melee.clear();
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}
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}
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