use crate::components::{ CombatStats, DefenseBonus, Equipped, MeleePowerBonus, Name, SufferDamage, WantsToMelee, }; use crate::{game_log::GameLog, particle_system::ParticleBuilder, Position}; use rltk::RGB; use specs::prelude::*; 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, CombatStats>, WriteStorage<'a, SufferDamage>, ReadStorage<'a, MeleePowerBonus>, ReadStorage<'a, DefenseBonus>, ReadStorage<'a, Equipped>, WriteExpect<'a, ParticleBuilder>, ReadStorage<'a, Position>, ); fn run(&mut self, data: Self::SystemData) { let ( entities, mut log, mut wants_melee, names, combat_stats, mut inflict_damage, melee_power_bonuses, defense_bonuses, equipped, mut particle_builder, positions, ) = data; for (entity, wants_melee, name, stats) in (&entities, &wants_melee, &names, &combat_stats).join() { if stats.hp > 0 { let mut offensive_bonus = 0; for (_item_entity, power_bonus, equipped_by) in (&entities, &melee_power_bonuses, &equipped).join() { if equipped_by.owner == entity { offensive_bonus += power_bonus.power; } } let target_stats = combat_stats.get(wants_melee.target).unwrap(); if target_stats.hp > 0 { let target_name = names.get(wants_melee.target).unwrap(); let mut defensive_bonus = 0; for (_item_entity, defense_bonus, equipped_by) in (&entities, &defense_bonuses, &equipped).join() { if equipped_by.owner == wants_melee.target { defensive_bonus += defense_bonus.defense; } } if let Some(pos) = positions.get(wants_melee.target) { particle_builder.request( pos.x, pos.y, RGB::named(rltk::ORANGE), RGB::named(rltk::BLACK), rltk::to_cp437('‼'), 200.0, ); } let damage = i32::max( 0, (stats.power + offensive_bonus) - (target_stats.defense + defensive_bonus), ); if damage == 0 { log.entries.push(format!( "{} is unable to hurt {}", &name.name, &target_name.name )); } else { log.entries.push(format!( "{} hits {}, for {} hp", &name.name, &target_name.name, damage )); SufferDamage::new_damage(&mut inflict_damage, wants_melee.target, damage); } } } } wants_melee.clear(); } }