72 lines
2.2 KiB
Rust
72 lines
2.2 KiB
Rust
use std::collections::HashMap;
|
|
|
|
use ::specs::prelude::*;
|
|
|
|
use crate::components::{ApplyMove, Chasing, MyTurn, Position};
|
|
use crate::Map;
|
|
|
|
pub struct ChaseAI {}
|
|
|
|
impl<'a> System<'a> for ChaseAI {
|
|
#[allow(clippy::type_complexity)]
|
|
type SystemData = (
|
|
WriteStorage<'a, MyTurn>,
|
|
WriteStorage<'a, Chasing>,
|
|
ReadStorage<'a, Position>,
|
|
ReadExpect<'a, Map>,
|
|
Entities<'a>,
|
|
WriteStorage<'a, ApplyMove>,
|
|
);
|
|
|
|
fn run(&mut self, data: Self::SystemData) {
|
|
let (mut turns, mut chasing, positions, map, entities, mut apply_move) = data;
|
|
|
|
let mut targets: HashMap<Entity, (i32, i32)> = HashMap::new();
|
|
let mut end_chase: Vec<Entity> = Vec::new();
|
|
for (entity, _turn, chasing) in (&entities, &turns, &chasing).join() {
|
|
if let Some(target_pos) = positions.get(chasing.target) {
|
|
targets.insert(entity, (target_pos.x, target_pos.y));
|
|
} else {
|
|
end_chase.push(entity);
|
|
}
|
|
}
|
|
|
|
for done in end_chase.iter() {
|
|
chasing.remove(*done);
|
|
}
|
|
end_chase.clear();
|
|
|
|
let mut turn_done: Vec<Entity> = Vec::new();
|
|
for (entity, pos, _chase, _myturn) in (&entities, &positions, &chasing, &turns).join() {
|
|
turn_done.push(entity);
|
|
let target_pos = targets[&entity];
|
|
let path = ::rltk::a_star_search(
|
|
map.xy_idx(pos.x, pos.y) as i32,
|
|
map.xy_idx(target_pos.0, target_pos.1) as i32,
|
|
&*map,
|
|
);
|
|
|
|
if path.success && path.steps.len() > 1 && path.steps.len() < 15 {
|
|
apply_move
|
|
.insert(
|
|
entity,
|
|
ApplyMove {
|
|
dest_idx: path.steps[1],
|
|
},
|
|
)
|
|
.expect("Unable to insert intent to move.");
|
|
turn_done.push(entity);
|
|
} else {
|
|
end_chase.push(entity);
|
|
}
|
|
}
|
|
|
|
for done in end_chase.iter() {
|
|
chasing.remove(*done);
|
|
}
|
|
for done in turn_done.iter() {
|
|
turns.remove(*done);
|
|
}
|
|
}
|
|
}
|