An implementation of Adam Millazo's FOV algorithm

This crate provides a single function, compute_fov which can be used to compute a field of view into a 2d grid from existing map data. compute_fov uses function callbacks to read map data and define visible tiles for the caller.

Example

use adam_fov_rs::*;

#[derive(Clone)]
enum Tile {
    Floor,
    Wall,
}

let width = 50;
let height = 50;
let index = |p: IVec2| p.y as usize * width + p.x as usize;

let mut game_map = vec![Tile::Floor; width * height];
// Add a vision blocker
game_map[index(IVec2::new(15, 16))] = Tile::Wall;

let mut vision = vec![false; width * height];

let is_opaque = |p| matches!(game_map[index(p)], Tile::Wall);
let mark_visible = |p| {
    let i = index(p);
    vision[i] = true;
};

compute_fov([15, 15], 5, [width, height], is_opaque, mark_visible);

let is_visible = |p| vision[index(p)];
assert!(!is_visible(IVec2::new(15, 17)));
assert!(is_visible(IVec2::new(17, 15)));

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Taken from the "terminal" example