Add initial monster chase mechanism

This commit is contained in:
Timothy Warren 2021-10-29 10:30:17 -04:00
parent 30b0449e99
commit 45ab89f795
2 changed files with 63 additions and 6 deletions

View File

@ -1,5 +1,5 @@
use super::Rect;
use rltk::{Algorithm2D, BaseMap, Point, RandomNumberGenerator, Rltk, RGB};
use rltk::{Algorithm2D, BaseMap, Point, RandomNumberGenerator, Rltk, SmallVec, RGB};
use specs::prelude::*;
use std::cmp::{max, min};
@ -107,6 +107,15 @@ impl Map {
map
}
fn is_exit_valid(&self, x: i32, y: i32) -> bool {
if x < 1 || x > self.width - 1 || y < 1 || y > self.height - 1 {
return false;
}
let idx = self.xy_idx(x, y);
self.tiles[idx as usize] != TileType::Wall
}
}
impl Algorithm2D for Map {
@ -119,6 +128,36 @@ impl BaseMap for Map {
fn is_opaque(&self, idx: usize) -> bool {
self.tiles[idx as usize] == TileType::Wall
}
fn get_available_exits(&self, idx: usize) -> SmallVec<[(usize, f32); 10]> {
let mut exits = rltk::SmallVec::new();
let x = idx as i32 % self.width;
let y = idx as i32 / self.width;
let w = self.width as usize;
if self.is_exit_valid(x - 1, y) {
exits.push((idx - 1, 1.0))
};
if self.is_exit_valid(x + 1, y) {
exits.push((idx + 1, 1.0))
};
if self.is_exit_valid(x, y - 1) {
exits.push((idx - w, 1.0))
};
if self.is_exit_valid(x, y + 1) {
exits.push((idx + w, 1.0))
};
exits
}
fn get_pathing_distance(&self, idx1: usize, idx2: usize) -> f32 {
let w = self.width as usize;
let p1 = Point::new(idx1 % w, idx1 / w);
let p2 = Point::new(idx2 % w, idx2 / w);
rltk::DistanceAlg::Pythagoras.distance2d(p1, p2)
}
}
pub fn draw_map(ecs: &World, ctx: &mut Rltk) {

View File

@ -1,23 +1,41 @@
use super::{Monster, Name, Viewshed};
use super::{Map, Monster, Name, Position, Viewshed};
use rltk::{console, Point};
use specs::prelude::*;
pub struct MonsterAI {}
impl<'a> System<'a> for MonsterAI {
#[allow(clippy::type_complexity)]
type SystemData = (
WriteExpect<'a, Map>,
ReadExpect<'a, Point>,
ReadStorage<'a, Viewshed>,
WriteStorage<'a, Viewshed>,
ReadStorage<'a, Monster>,
ReadStorage<'a, Name>,
WriteStorage<'a, Position>,
);
fn run(&mut self, data: Self::SystemData) {
let (player_pos, viewshed, monster, name) = data;
let (mut map, player_pos, mut viewshed, monster, name, mut position) = data;
for (viewshed, _monster, name) in (&viewshed, &monster, &name).join() {
for (mut viewshed, _monster, name, mut pos) in
(&mut viewshed, &monster, &name, &mut position).join()
{
if viewshed.visible_tiles.contains(&*player_pos) {
console::log(format!("{} shouts insults", name.name));
console::log(&format!("{} shouts insults", name.name));
let path = rltk::a_star_search(
map.xy_idx(pos.x, pos.y) as i32,
map.xy_idx(player_pos.x, player_pos.y) as i32,
&mut *map,
);
if path.success && path.steps.len() > 1 {
pos.x = path.steps[1] as i32 % map.width;
pos.y = path.steps[1] as i32 / map.width;
viewshed.dirty = true;
}
}
}
}