122 lines
4.5 KiB
Rust
122 lines
4.5 KiB
Rust
use ::rltk::RandomNumberGenerator;
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use ::specs::prelude::*;
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use crate::components::{EntityMoved, MoveMode, Movement, MyTurn, Position, Viewshed};
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use crate::{spatial, tile_walkable, Map};
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pub struct DefaultMoveAI {}
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impl<'a> System<'a> for DefaultMoveAI {
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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, MoveMode>,
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WriteStorage<'a, Position>,
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ReadExpect<'a, Map>,
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WriteStorage<'a, Viewshed>,
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WriteStorage<'a, EntityMoved>,
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WriteExpect<'a, RandomNumberGenerator>,
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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 move_mode,
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mut positions,
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map,
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mut viewsheds,
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mut entity_moved,
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mut rng,
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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, mut mode, mut viewshed, _myturn) in (
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&entities,
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&mut positions,
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&mut move_mode,
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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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match &mut mode.mode {
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Movement::Static => {}
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Movement::Random => {
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let mut x = pos.x;
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let mut y = pos.y;
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match rng.roll_dice(1, 5) {
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1 => x -= 1,
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2 => x += 1,
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3 => y -= 1,
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4 => y += 1,
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_ => {}
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}
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if x > 0 && x < map.width - 1 && y > 0 && y < map.height - 1 {
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let dest_idx = map.xy_idx(x, y);
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if !spatial::is_blocked(dest_idx) {
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let idx = map.xy_idx(pos.x, pos.y);
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pos.x = x;
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pos.y = y;
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entity_moved
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.insert(entity, EntityMoved {})
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.expect("Unable to insert movement marker");
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crate::spatial::move_entity(entity, idx, dest_idx);
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viewshed.dirty = true;
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}
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}
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}
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Movement::RandomWaypoint { path } => {
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if let Some(path) = path {
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// We have a target - go there
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let idx = map.xy_idx(pos.x, pos.y);
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if path.len() > 1 {
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if !spatial::is_blocked(path[1]) {
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pos.x = (path[1] as i32 % map.width) as i32;
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pos.y = (path[1] as i32 / map.width) as i32;
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entity_moved
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.insert(entity, EntityMoved {})
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.expect("Unable to insert movement marker");
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let new_idx = map.xy_idx(pos.x, pos.y);
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spatial::move_entity(entity, idx, new_idx);
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viewshed.dirty = true;
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path.remove(0); // Remove the first step in the path
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}
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} else {
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// Otherwise we wait a turn to see if the path clears up
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mode.mode = Movement::RandomWaypoint { path: None };
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}
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} else {
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let target_x = rng.roll_dice(1, map.width - 2);
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let target_y = rng.roll_dice(1, map.height - 2);
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let idx = map.xy_idx(target_x, target_y);
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if tile_walkable(map.tiles[idx]) {
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let path = ::rltk::a_star_search(
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map.xy_idx(pos.x, pos.y) as i32,
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map.xy_idx(target_x, target_y) 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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mode.mode = Movement::RandomWaypoint {
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path: Some(path.steps),
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};
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}
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}
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}
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}
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}
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}
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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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