85 lines
2.8 KiB
Rust
85 lines
2.8 KiB
Rust
use crate::components::{
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CombatStats, DefenseBonus, Equipped, MeleePowerBonus, Name, SufferDamage, WantsToMelee,
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};
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use crate::game_log::GameLog;
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use specs::prelude::*;
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pub struct MeleeCombatSystem {}
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impl<'a> System<'a> for MeleeCombatSystem {
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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, CombatStats>,
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WriteStorage<'a, SufferDamage>,
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ReadStorage<'a, MeleePowerBonus>,
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ReadStorage<'a, DefenseBonus>,
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ReadStorage<'a, Equipped>,
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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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combat_stats,
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mut inflict_damage,
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melee_power_bonuses,
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defense_bonuses,
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equipped,
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) = data;
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for (entity, wants_melee, name, stats) in
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(&entities, &wants_melee, &names, &combat_stats).join()
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{
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if stats.hp > 0 {
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let mut offensive_bonus = 0;
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for (_item_entity, power_bonus, equipped_by) in
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(&entities, &melee_power_bonuses, &equipped).join()
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{
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if equipped_by.owner == entity {
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offensive_bonus += power_bonus.power;
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}
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}
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let target_stats = combat_stats.get(wants_melee.target).unwrap();
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if target_stats.hp > 0 {
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let target_name = names.get(wants_melee.target).unwrap();
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let mut defensive_bonus = 0;
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for (_item_entity, defense_bonus, equipped_by) in
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(&entities, &defense_bonuses, &equipped).join()
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{
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if equipped_by.owner == wants_melee.target {
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defensive_bonus += defense_bonus.defense;
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}
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}
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let damage = i32::max(
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0,
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(stats.power + offensive_bonus) - (target_stats.defense + defensive_bonus),
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);
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if damage == 0 {
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log.entries.push(format!(
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"{} is unable to hurt {}",
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&name.name, &target_name.name
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));
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} else {
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log.entries.push(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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SufferDamage::new_damage(&mut inflict_damage, wants_melee.target, damage);
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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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