use ::rltk::RandomNumberGenerator; use ::specs::prelude::*; use crate::components::{ Attributes, Equipped, HungerClock, HungerState, MeleeWeapon, Name, Pools, Skill, Skills, SufferDamage, WantsToMelee, Wearable, }; use crate::game_log::GameLog; use crate::gamesystem::skill_bonus; use crate::particle_system::ParticleBuilder; use crate::{colors, EquipmentSlot, NaturalAttackDefense, Position, WeaponAttribute}; pub struct MeleeCombatSystem {} impl<'a> System<'a> for MeleeCombatSystem { #[allow(clippy::type_complexity)] type SystemData = ( Entities<'a>, WriteExpect<'a, GameLog>, WriteStorage<'a, WantsToMelee>, ReadStorage<'a, Name>, ReadStorage<'a, Attributes>, ReadStorage<'a, Skills>, WriteStorage<'a, SufferDamage>, WriteExpect<'a, ParticleBuilder>, ReadStorage<'a, Position>, ReadStorage<'a, HungerClock>, ReadStorage<'a, Pools>, WriteExpect<'a, RandomNumberGenerator>, ReadStorage<'a, Equipped>, ReadStorage<'a, MeleeWeapon>, ReadStorage<'a, Wearable>, ReadStorage<'a, NaturalAttackDefense>, ReadExpect<'a, Entity>, ); fn run(&mut self, data: Self::SystemData) { let ( entities, mut log, mut wants_melee, names, attributes, skills, mut inflict_damage, mut particle_builder, positions, hunger_clock, pools, mut rng, equipped_items, meleeweapons, wearables, natural, player_entity, ) = data; for (entity, wants_melee, name, attacker_attributes, attacker_skills, attacker_pools) in ( &entities, &wants_melee, &names, &attributes, &skills, &pools, ) .join() { // Are the attacker and defender alive? Only attack if they are let target_pools = pools.get(wants_melee.target).unwrap(); let target_attributes = attributes.get(wants_melee.target).unwrap(); let target_skills = skills.get(wants_melee.target).unwrap(); if attacker_pools.hit_points.current > 0 && target_pools.hit_points.current > 0 { let target_name = names.get(wants_melee.target).unwrap(); let mut weapon_info = MeleeWeapon { attribute: WeaponAttribute::Might, hit_bonus: 0, damage_n_dice: 1, damage_die_type: 4, damage_bonus: 0, }; if let Some(nat) = natural.get(entity) { if !nat.attacks.is_empty() { let attack_index = if nat.attacks.len() == 1 { 0 } else { rng.roll_dice(1, nat.attacks.len() as i32) as usize - 1 }; let attk = &nat.attacks[attack_index]; weapon_info.hit_bonus = attk.hit_bonus; weapon_info.damage_n_dice = attk.damage_n_dice; weapon_info.damage_die_type = attk.damage_die_type; weapon_info.damage_bonus = attk.damage_bonus; } } for (wielded, melee) in (&equipped_items, &meleeweapons).join() { if wielded.owner == entity && wielded.slot == EquipmentSlot::Melee { weapon_info = melee.clone(); } } let natural_roll = rng.roll_dice(1, 20); let attribute_hit_bonus = if weapon_info.attribute == WeaponAttribute::Might { attacker_attributes.might.bonus } else { attacker_attributes.quickness.bonus }; let skill_hit_bonus = skill_bonus(Skill::Melee, &*attacker_skills); let weapon_hit_bonus = weapon_info.hit_bonus; let mut status_hit_bonus = 0; if let Some(hc) = hunger_clock.get(entity) { // Well-Fed grants +1 if hc.state == HungerState::WellFed { status_hit_bonus += 1; } } let modified_hit_roll = natural_roll + attribute_hit_bonus + skill_hit_bonus + weapon_hit_bonus + status_hit_bonus; let mut armor_item_bonus_f = 0.0; for (wielded, armor) in (&equipped_items, &wearables).join() { if wielded.owner == wants_melee.target { armor_item_bonus_f += armor.armor_class; } } let base_armor_class = match natural.get(wants_melee.target) { None => 10, Some(nat) => nat.armor_class.unwrap_or(10), }; let armor_quickness_bonus = target_attributes.quickness.bonus; let armor_skill_bonus = skill_bonus(Skill::Defense, &*target_skills); let armor_item_bonus = armor_item_bonus_f as i32; let armor_class = base_armor_class + armor_quickness_bonus + armor_skill_bonus + armor_item_bonus; if natural_roll != 1 && (natural_roll == 20 || modified_hit_roll > armor_class) { // Target hit! Until we support weapons, we're going with 1d4 let base_damage = rng.roll_dice(1, 4); let attr_damage_bonus = attacker_attributes.might.bonus; let skill_damage_bonus = skill_bonus(Skill::Melee, &*attacker_skills); let weapon_damage_bonus = weapon_info.damage_bonus; let damage = i32::max( 0, base_damage + attr_damage_bonus + skill_hit_bonus + skill_damage_bonus + weapon_damage_bonus, ); SufferDamage::new_damage( &mut inflict_damage, wants_melee.target, damage, entity == *player_entity, ); log.append(format!( "{} hits {} for {} hp.", &name.name, &target_name.name, damage )); if let Some(pos) = positions.get(wants_melee.target) { particle_builder.request( pos.x, pos.y, colors::ORANGE, colors::BLACK, rltk::to_cp437('‼'), 200.0, ); } } else if natural_roll == 1 { // Natural 1 miss log.append(format!( "{} considers attacking {}, but misjudges the timing.", name.name, target_name.name )); if let Some(pos) = positions.get(wants_melee.target) { particle_builder.request( pos.x, pos.y, colors::BLUE, colors::BLACK, rltk::to_cp437('‼'), 200.0, ); } } else { // Miss log.append(format!( "{} attacks {}, but can't connect", name.name, target_name.name )); if let Some(pos) = positions.get(wants_melee.target) { particle_builder.request( pos.x, pos.y, colors::CYAN, colors::BLACK, rltk::to_cp437('‼'), 200.0, ); } } } } wants_melee.clear(); } }