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- use specs::prelude::*;
- use super::{CombatStats, WantsToMelee, Name,
- SufferDamage, GameLog, MeleePowerBonus,
- DefenseBonus, Equipped, particle_system::ParticleBuilder,
- Position};
- pub struct MeleeCombatSystem {}
- impl<'a> System<'a> for MeleeCombatSystem {
- 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;
- }
- }
- let pos = positions.get(wants_melee.target);
- if let Some(pos) = pos {
- particle_builder.request(pos.x, pos.y, rltk::RGB::named(rltk::ORANGE), rltk::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 {} damage.", &name.name, &target_name.name, damage));
- SufferDamage::new_damage(&mut inflict_damage, wants_melee.target, damage);
- }
- }
- }
- }
- wants_melee.clear();
- }
- }
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