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extern crate sdl2;
extern crate rand;
use sdl2::event::Event;
use sdl2::keyboard::Keycode;
use sdl2::pixels::Color;
use rand::Rng;
pub mod vector2;
pub mod boid;
use boid::Boid;
const HEIGHT: i32 = 480;
const WIDTH: i32 = 640;
const BOIDS_NUM: usize = 100;
// const NEIGHBOURS_RADIUS: i32 = ((HEIGHT + WIDTH) / 2) / 10;
fn main() {
let sdl = sdl2::init().unwrap();
let video_subsys = sdl.video().unwrap();
let window = video_subsys.window("boids", WIDTH as u32, HEIGHT as u32).build().unwrap();
let mut canvas = window.into_canvas().build().unwrap();
let mut boids: Vec<Boid> = Vec::with_capacity(BOIDS_NUM);
let mut rng = rand::thread_rng();
for _ in 0..BOIDS_NUM {
boids.push(Boid::new(
rng.gen_range(0, WIDTH as i32),
rng.gen_range(0, HEIGHT as i32),
rng.gen_range(-2.0, 2.0),
rng.gen_range(-2.0, 2.0),
));
}
let mut event_pump = sdl.event_pump().unwrap();
'main: loop {
for event in event_pump.poll_iter() {
match event {
Event::Quit { .. } |
Event::KeyDown { keycode: Some(Keycode::Q), .. } |
Event::KeyDown { keycode: Some(Keycode::Escape), .. }
=> break 'main,
_ => {},
}
}
canvas.set_draw_color(Color::RGB(0, 0, 0));
canvas.clear();
canvas.set_draw_color(Color::RGB(200, 200, 200));
for b in boids.iter() {
b.draw(&mut canvas);
}
canvas.present();
let prev_boids = boids.clone();
for b in boids.iter_mut() {
b.step(&prev_boids, WIDTH, HEIGHT);
}
std::thread::sleep(std::time::Duration::new(0, 50_000_000));
}
}
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