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- extern crate specs;
- use specs::prelude::*;
- use super::{CombatStats, SufferDamage, Player, Name, gamelog::GameLog, RunState, Position, Map};
- pub struct DamageSystem {}
- impl<'a> System<'a> for DamageSystem {
- type SystemData = ( WriteStorage<'a, CombatStats>,
- WriteStorage<'a, SufferDamage>,
- ReadStorage<'a, Position>,
- WriteExpect<'a, Map>,
- Entities<'a> );
- fn run(&mut self, data : Self::SystemData) {
- let (mut stats, mut damage, positions, mut map, entities) = data;
- for (entity, mut stats, damage) in (&entities, &mut stats, &damage).join() {
- stats.hp -= damage.amount;
- let pos = positions.get(entity);
- if let Some(pos) = pos {
- let idx = map.xy_idx(pos.x, pos.y);
- map.bloodstains.insert(idx);
- }
- }
- damage.clear();
- }
- }
- pub fn delete_the_dead(ecs : &mut World) {
- let mut dead : Vec<Entity> = Vec::new();
- // Using a scope to make the borrow checker happy
- {
- let combat_stats = ecs.read_storage::<CombatStats>();
- let players = ecs.read_storage::<Player>();
- let names = ecs.read_storage::<Name>();
- let entities = ecs.entities();
- let mut log = ecs.write_resource::<GameLog>();
- for (entity, stats) in (&entities, &combat_stats).join() {
- if stats.hp < 1 {
- let player = players.get(entity);
- match player {
- None => {
- let victim_name = names.get(entity);
- if let Some(victim_name) = victim_name {
- log.entries.insert(0, format!("{} is dead", &victim_name.name));
- }
- dead.push(entity)
- }
- Some(_) => {
- let mut runstate = ecs.write_resource::<RunState>();
- *runstate = RunState::GameOver;
- }
- }
- }
- }
- }
- for victim in dead {
- ecs.delete_entity(victim).expect("Unable to delete");
- }
- }
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