73 lines
2.0 KiB
Rust
73 lines
2.0 KiB
Rust
use ::rltk::a_star_search;
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use ::specs::prelude::*;
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use crate::components::{EntityMoved, MyTurn, Position, Viewshed, WantsToApproach};
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use crate::Map;
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pub struct ApproachAI {}
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impl<'a> System<'a> for ApproachAI {
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#[allow(clippy::type_complexity)]
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type SystemData = (
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WriteStorage<'a, MyTurn>,
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WriteStorage<'a, WantsToApproach>,
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WriteStorage<'a, Position>,
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WriteExpect<'a, Map>,
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WriteStorage<'a, Viewshed>,
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WriteStorage<'a, EntityMoved>,
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Entities<'a>,
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);
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fn run(&mut self, data: Self::SystemData) {
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let (
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mut turns,
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mut want_approach,
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mut positions,
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mut map,
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mut viewsheds,
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mut entity_moved,
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entities,
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) = data;
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let mut turn_done: Vec<Entity> = Vec::new();
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for (entity, mut pos, approach, mut viewshed, _myturn) in (
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&entities,
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&mut positions,
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&want_approach,
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&mut viewsheds,
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&turns,
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)
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.join()
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{
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turn_done.push(entity);
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let path = a_star_search(
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map.xy_idx(pos.x, pos.y) as i32,
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map.xy_idx(approach.idx % map.width, approach.idx / map.width) as i32,
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&*map,
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);
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if path.success && path.steps.len() > 1 {
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let mut idx = map.xy_idx(pos.x, pos.y);
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map.blocked[idx] = false;
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pos.x = path.steps[1] as i32 % map.width;
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pos.y = path.steps[1] as i32 / map.width;
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entity_moved
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.insert(entity, EntityMoved {})
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.expect("Unable to insert moved marker");
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idx = map.xy_idx(pos.x, pos.y);
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map.blocked[idx] = true;
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viewshed.dirty = true;
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}
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}
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want_approach.clear();
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// Remove turn marker for those that are done
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for done in turn_done.iter() {
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turns.remove(*done);
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}
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}
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}
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