rust-roguelike-tutorial/chapter-05-fov/src/components.rs

extern crate specs;
use specs::prelude::*;
extern crate specs_derive;
extern crate rltk;
use rltk::{RGB};

#[derive(Component)]
pub struct Position {
    pub x: i32,
    pub y: i32,
}

#[derive(Component)]
pub struct Renderable {
    pub glyph: u8,
    pub fg: RGB,
    pub bg: RGB,
}
 
#[derive(Component, Debug)]
pub struct Player {}

#[derive(Component)]
pub struct Viewshed {
    pub visible_tiles : Vec<rltk::Point>,
    pub range : i32,
    pub dirty : bool
}