use std::net::Ipv4Addr;
use bevy::utils::tracing;
use bevy::{ecs::event::ManualEventReader, prelude::*};
use bevy_twite::{twite::frame::MessageType, ServerEvent, TwiteServerConfig, TwiteServerPlugin};
use bevy_rapier2d::prelude::*;
use component::*;
use packet::*;
use rand::Rng;
pub mod component;
pub mod packet;
pub mod macros;
const SCALE: f32 = 10.0;
const EARTH_SIZE: f32 = 1000.0;
const GRAVITY: f32 = 0.02;
fn main() {
let subscriber = tracing_subscriber::FmtSubscriber::new();
tracing::subscriber::set_global_default(subscriber).unwrap();
info!(
"StarKingdoms server v{} starting up",
env!("CARGO_PKG_VERSION")
);
App::new()
.insert_resource(TwiteServerConfig { addr: Ipv4Addr::new(0, 0, 0, 0), port: 3000 })
.add_plugins(MinimalPlugins)
.insert_resource(RapierConfiguration {
gravity: Vect { x: 0., y: 0. },
..Default::default()
})
.add_plugins(RapierPhysicsPlugin::<NoUserData>::pixels_per_meter(SCALE))
.add_plugins(TwiteServerPlugin)
.add_systems(Startup, spawn_planets)
.add_systems(Update, on_message)
.add_systems(Update, on_close)
.add_systems(FixedUpdate, on_position_change)
.add_systems(FixedUpdate, do_gravity)
.run();
info!("Goodbye!");
}
fn spawn_planets(mut commands: Commands) {
info!("Spawning planets");
let earth_pos = Transform::from_xyz(0.0, 0.0, 0.0);
commands
.spawn(PlanetBundle {
planet_type: PlanetType::Earth,
transform: TransformBundle::from(earth_pos),
})
.insert(Collider::ball(EARTH_SIZE / SCALE))
.insert(AdditionalMassProperties::Mass(10000.0))
.insert(ReadMassProperties::default())
.insert(RigidBody::Fixed);
}
fn on_message(
mut commands: Commands,
planet_query: Query<(Entity, &PlanetType, &Transform)>,
player_query: Query<(Entity, &Player)>,
part_query: Query<(Entity, &PartType, &Transform)>,
mut packet_recv: Local<ManualEventReader<ServerEvent>>,
mut packet_event_send: ResMut<Events<ServerEvent>>,
) {
let mut event_queue = Vec::new();
for ev in packet_recv.read(&packet_event_send) {
if let ServerEvent::Recv(addr, MessageType::Text, data) = ev {
let data = String::from_utf8_lossy(data);
let packet: Packet = err_or_cont!(serde_json::from_str(&data));
match packet {
Packet::ClientLogin { username, .. } => {
let angle: f32 = {
let mut rng = rand::thread_rng();
rng.gen::<f32>() * std::f32::consts::PI * 2.
};
let mut transform = Transform::from_xyz(angle.cos() * 1100. / SCALE, angle.sin() * 1100. / SCALE, 0.0);
transform.rotate_z(angle);
let id = commands
.spawn(PlayerBundle {
part: PartBundle {
part_type: PartType::Hearty,
transform: TransformBundle::from(transform),
},
player: Player { addr: *addr, username: username.to_string() },
})
.insert(Collider::cuboid(25.0 / SCALE, 25.0 / SCALE))
.insert(AdditionalMassProperties::Mass(10.0))
.insert(ExternalImpulse { impulse: Vec2::ZERO, torque_impulse: 0. })
.insert(ReadMassProperties::default())
.insert(RigidBody::Dynamic)
.id().index();
// tell this player the planets
let mut planets = Vec::new();
for (entity, planet_type, transform) in planet_query.iter() {
let translation = transform.translation;
planets.push((entity.index(), Planet {
planet_type: *planet_type,
transform: proto_transform!(Transform::from_translation(translation * SCALE)),
radius: match *planet_type {
PlanetType::Earth => EARTH_SIZE
}
}));
}
let packet = Packet::PlanetPositions { planets };
let buf = serde_json::to_vec(&packet).unwrap();
event_queue.push(ServerEvent::Send(*addr, MessageType::Text, buf));
// tell the player already existing users
let mut players = Vec::new();
for (entity, player) in &player_query {
players.push((entity.index(), player.username.clone()));
}
let packet = Packet::PlayerList {
players,
};
let buf = serde_json::to_vec(&packet).unwrap();
event_queue.push(ServerEvent::Send(*addr, MessageType::Text, buf));
// tell other players that a player has spawned in
let packet = Packet::SpawnPlayer {
id,
username: username.to_string(),
};
let buf = serde_json::to_vec(&packet).unwrap();
event_queue.push(ServerEvent::Broadcast(MessageType::Text, buf));
// tell the player where parts are
let mut parts = Vec::new();
for (entity, part_type, transform) in &part_query {
parts.push((entity.index(), Part {
part_type: *part_type,
transform: proto_transform!(Transform::from_translation(transform.translation * SCALE)),
}));
}
parts.push((id, Part {
part_type: PartType::Hearty,
transform: proto_transform!(Transform::from_translation(transform.translation * SCALE).with_rotation(transform.rotation)),
}));
let packet = Packet::PartPositions {
parts
};
let buf = serde_json::to_vec(&packet).unwrap();
event_queue.push(ServerEvent::Send(*addr, MessageType::Text, buf));
// and send the welcome message :)
let packet = Packet::Message {
message_type: packet::MessageType::Server,
actor: "SERVER".to_string(),
content: "Welcome to StarKingdoms.IO! Have fun!".to_string(),
};
let buf = serde_json::to_vec(&packet).unwrap();
event_queue.push(ServerEvent::Send(*addr, MessageType::Text, buf));
}
Packet::SendMessage { target, content } => {
// find our player
let mut player = None;
for (_, q_player) in &player_query {
if q_player.addr == *addr {
player = Some(q_player);
}
}
let player = player.unwrap();
if let Some(target_username) = target {
let mut target_player = None;
for (_, q_player) in &player_query {
if q_player.username == target_username {
target_player = Some(q_player);
}
}
let target_player = target_player.unwrap();
let packet = Packet::Message {
message_type: packet::MessageType::Direct,
actor: player.username.clone(),
content,
};
let buf = serde_json::to_vec(&packet).unwrap();
event_queue.push(ServerEvent::Send(target_player.addr, MessageType::Text, buf.clone()));
event_queue.push(ServerEvent::Send(*addr, MessageType::Text, buf));
} else {
// send to general chat
let packet = Packet::Message {
message_type: packet::MessageType::Chat,
actor: player.username.clone(),
content,
};
let buf = serde_json::to_vec(&packet).unwrap();
event_queue.push(ServerEvent::Broadcast(MessageType::Text, buf));
}
}
_ => continue
}
}
}
for event in event_queue {
packet_event_send.send(event);
}
}
fn on_close(
player_query: Query<(Entity, &Player)>,
mut commands: Commands,
mut packet_recv: Local<ManualEventReader<ServerEvent>>,
mut packet_send: ResMut<Events<ServerEvent>>,
) {
let mut packets = Vec::new();
for packet in packet_recv.read(&packet_send) {
if let ServerEvent::Close(addr) = packet {
for (entity, player) in &player_query {
if player.addr == *addr {
commands.entity(entity).despawn();
let packet = Packet::PlayerLeave {
id: entity.index()
};
let buf = serde_json::to_vec(&packet).unwrap();
for (in_entity, player) in &player_query {
if entity != in_entity {
packets.push(ServerEvent::Send(player.addr, MessageType::Text, buf.clone()));
}
}
}
}
}
}
for packet in packets {
packet_send.send(packet);
}
}
fn on_position_change(
mut commands: Commands,
part_query: Query<(Entity, &PartType, &Transform), Changed<Transform>>,
planet_query: Query<(Entity, &PlanetType, &Transform), Changed<Transform>>,
mut packet_send: EventWriter<ServerEvent>,
) {
let mut updated_parts = Vec::new();
for (entity, part_type, transform) in part_query.iter() {
let id = commands.entity(entity).id().index();
updated_parts.push((id, Part {
part_type: *part_type,
transform: proto_transform!(Transform::from_translation(transform.translation * SCALE).with_rotation(transform.rotation)),
}));
}
if !updated_parts.is_empty() {
let packet = Packet::PartPositions { parts: updated_parts };
let buf = serde_json::to_vec(&packet).unwrap();
packet_send.send(ServerEvent::Broadcast(MessageType::Text, buf));
}
let mut planets = Vec::new();
for (entity, planet_type, transform) in planet_query.iter() {
let id = commands.entity(entity).id().index();
planets.push((id, Planet {
planet_type: *planet_type,
transform: proto_transform!(Transform::from_translation(transform.translation * SCALE)),
radius: match *planet_type {
PlanetType::Earth => EARTH_SIZE,
}
}));
}
if !planets.is_empty() {
let packet = Packet::PlanetPositions { planets };
let buf = serde_json::to_vec(&packet).unwrap();
packet_send.send(ServerEvent::Broadcast(MessageType::Text, buf));
}
}
fn do_gravity(
mut part_query: Query<(&Transform, &ReadMassProperties, &mut ExternalImpulse), With<PartType>>,
planet_query: Query<(&Transform, &ReadMassProperties), With<PlanetType>>,
) {
for (part_transform, part_mp, mut impulses) in &mut part_query {
impulses.impulse = Vec2::ZERO;
let part_mp = part_mp.get();
let part_mass = part_mp.mass;
let part_translate = part_transform.translation;
for (planet_transform, planet_mp) in &planet_query {
let planet_mp = planet_mp.get();
let planet_mass = planet_mp.mass;
let planet_translate = planet_transform.translation;
let distance = planet_translate.distance(part_translate);
let force = GRAVITY * ((part_mass * planet_mass) / (distance * distance));
let direction = (planet_translate - part_translate).normalize() * force;
impulses.impulse += direction.xy();
}
}
}