space-crush/space-crush-app/src/main.rs

use log::{error, info};
use rand::random;
use space_crush_app::{App, Error};
use space_crush_common::{
    components::Player,
    misc::{init_logger, Persistence, Vfs, WorldPersistence},
    Dispatcher,
};
use specs::{Entity, World, WorldExt};

fn main() -> Result<(), Error> {
    let vfs = Vfs::new(&["space-crush-app"])?;

    init_logger(&vfs, "log4rs.yml");

    vfs.log_info();

    info!("Application started");

    if let Err(err) = run(vfs) {
        error!("Error while executing application: {}", err);

        return Err(err);
    }

    info!("Application exited");

    Ok(())
}

fn run(vfs: Vfs) -> Result<(), Error> {
    info!("Application initialization");

    let mut world = World::new();
    world.insert(vfs);
    WorldPersistence::setup(&mut world);

    let mut common = Dispatcher::new(&mut world)?;
    let player1 = Player::builder().color((0.0, 0.5, 1.0)).build(&mut world)?;
    let mut app = App::new(&mut world, player1)?;

    create_world(&mut world, player1);

    info!("Application initialized");

    while app.is_running() {
        world.maintain();

        common.process(&world);
        app.process(&world)?;
    }

    Ok(())
}

fn create_world(world: &mut World, player_id: Entity) {
    use glc::matrix::Angle;
    use space_crush_common::components::{Asteroid, AsteroidType, Fleet, Planet, Ship, ShipType};

    let planets = (0..3)
        .map(|i| {
            let x = 2000.0 * (i as f32 - 1.0);
            let y = 0.0;

            Planet::builder()
                .position((x, y))
                .size(250.0)
                .orbit(325.0, 425.0)
                .owner(player_id)
                .build(world)
                .unwrap()
        })
        .collect::<Vec<_>>();

    for i in 0..4 {
        let i_x: isize = if i & 1 == 0 { -1 } else { 1 };
        let i_y: isize = if i & 2 == 0 { -1 } else { 1 };

        let x = 1000.0 * i_x as f32;
        let y = 1000.0 * i_y as f32;

        Asteroid::builder()
            .position((x, y))
            .size(100.0)
            .orbit(125.0, 175.0)
            .type_(match i_x * i_y {
                -1 => AsteroidType::Metal,
                1 => AsteroidType::Crystal,
                _ => unreachable!(),
            })
            .build(world)
            .unwrap();
    }

    let fleet_id = Fleet::builder()
        .player(player_id)
        .orbiting(planets[1])
        .build(world)
        .unwrap();

    for i in 0..9 {
        let r = 325.0 + 100.0 * random::<f32>();
        let a = Angle::Deg(360.0 * random::<f32>());

        let x = r * a.cos();
        let y = r * a.sin();

        Ship::builder()
            .player(player_id)
            .fleet(fleet_id)
            .position((x, y))
            .type_(match i % 3 {
                0 => ShipType::Fighter,
                1 => ShipType::Bomber,
                2 => ShipType::Transporter,
                _ => unreachable!(),
            })
            .build(world)
            .unwrap();
    }
}