valence/examples/conway.rs
Ryan Johnson 420f2d1b7c
Move protocol code to valence_protocol + redesigns (#153)
Closes #83 

This PR aims to move all of Valence's networking code to the new
`valence_protocol` crate. Anything not specific to valence is going in
the new crate. It also redesigns the way packets are defined and makes a
huge number of small additions and improvements. It should be much
easier to see where code is supposed to go from now on.

`valence_protocol` is a new library which enables interactions with
Minecraft's protocol. It is completely decoupled from valence and can be
used to build new clients, servers, tools, etc.

There are two additions that will help with #5 especially:
- It is now easy to define new packets or modifications of existing
packets. Not all packets need to be bidirectional.
- The `CachedEncode` type has been created. This is used to safely cache
redundant calls to `Encode::encode`.
2022-11-13 06:10:42 -08:00

295 lines
9.9 KiB
Rust

use std::mem;
use std::net::{Ipv4Addr, SocketAddr, SocketAddrV4};
use std::sync::atomic::{AtomicUsize, Ordering};
use log::LevelFilter;
use num::Integer;
use rayon::prelude::*;
use valence::prelude::*;
pub fn main() -> ShutdownResult {
env_logger::Builder::new()
.filter_module("valence", LevelFilter::Trace)
.parse_default_env()
.init();
valence::start_server(
Game {
player_count: AtomicUsize::new(0),
},
ServerState {
player_list: None,
paused: false,
board: vec![false; SIZE_X * SIZE_Z].into_boxed_slice(),
board_buf: vec![false; SIZE_X * SIZE_Z].into_boxed_slice(),
},
)
}
struct Game {
player_count: AtomicUsize,
}
struct ServerState {
player_list: Option<PlayerListId>,
paused: bool,
board: Box<[bool]>,
board_buf: Box<[bool]>,
}
#[derive(Default)]
struct ClientState {
entity_id: EntityId,
}
const MAX_PLAYERS: usize = 10;
const SIZE_X: usize = 100;
const SIZE_Z: usize = 100;
const BOARD_Y: i32 = 50;
#[async_trait]
impl Config for Game {
type ServerState = ServerState;
type ClientState = ClientState;
type EntityState = ();
type WorldState = ();
type ChunkState = ();
type PlayerListState = ();
fn address(&self) -> SocketAddr {
SocketAddrV4::new(Ipv4Addr::new(0, 0, 0, 0), 25565).into() // TODO remove
}
fn dimensions(&self) -> Vec<Dimension> {
vec![Dimension {
fixed_time: Some(6000),
..Dimension::default()
}]
}
fn biomes(&self) -> Vec<Biome> {
vec![Biome {
name: ident!("plains"),
grass_color: Some(0x00ff00),
..Biome::default()
}]
}
async fn server_list_ping(
&self,
_server: &SharedServer<Self>,
_remote_addr: SocketAddr,
_protocol_version: i32,
) -> ServerListPing {
ServerListPing::Respond {
online_players: self.player_count.load(Ordering::SeqCst) as i32,
max_players: MAX_PLAYERS as i32,
player_sample: Default::default(),
description: "Hello Valence!".color(Color::AQUA),
favicon_png: Some(include_bytes!("../assets/logo-64x64.png").as_slice().into()),
}
}
fn init(&self, server: &mut Server<Self>) {
let world = server.worlds.insert(DimensionId::default(), ()).1;
server.state.player_list = Some(server.player_lists.insert(()).0);
for chunk_z in -2..Integer::div_ceil(&(SIZE_Z as i32), &16) + 2 {
for chunk_x in -2..Integer::div_ceil(&(SIZE_X as i32), &16) + 2 {
world.chunks.insert(
[chunk_x as i32, chunk_z as i32],
UnloadedChunk::default(),
(),
);
}
}
}
fn update(&self, server: &mut Server<Self>) {
let (world_id, world) = server.worlds.iter_mut().next().unwrap();
let spawn_pos = [
SIZE_X as f64 / 2.0,
BOARD_Y as f64 + 1.0,
SIZE_Z as f64 / 2.0,
];
server.clients.retain(|_, client| {
if client.created_this_tick() {
if self
.player_count
.fetch_update(Ordering::SeqCst, Ordering::SeqCst, |count| {
(count < MAX_PLAYERS).then_some(count + 1)
})
.is_err()
{
client.disconnect("The server is full!".color(Color::RED));
return false;
}
match server
.entities
.insert_with_uuid(EntityKind::Player, client.uuid(), ())
{
Some((id, _)) => client.state.entity_id = id,
None => {
client.disconnect("Conflicting UUID");
return false;
}
}
client.spawn(world_id);
client.set_flat(true);
client.teleport(spawn_pos, 0.0, 0.0);
client.set_player_list(server.state.player_list.clone());
if let Some(id) = &server.state.player_list {
server.player_lists.get_mut(id).insert(
client.uuid(),
client.username(),
client.textures().cloned(),
client.game_mode(),
0,
None,
);
}
client.send_message("Welcome to Conway's game of life in Minecraft!".italic());
client.send_message(
"Sneak and hold the left mouse button to bring blocks to life.".italic(),
);
}
if client.is_disconnected() {
self.player_count.fetch_sub(1, Ordering::SeqCst);
server.entities.remove(client.state.entity_id);
if let Some(id) = &server.state.player_list {
server.player_lists.get_mut(id).remove(client.uuid());
}
return false;
}
let player = server.entities.get_mut(client.state.entity_id).unwrap();
if client.position().y <= 0.0 {
client.teleport(spawn_pos, client.yaw(), client.pitch());
server.state.board.fill(false);
}
while let Some(event) = handle_event_default(client, player) {
match event {
ClientEvent::Digging { position, .. } => {
if (0..SIZE_X as i32).contains(&position.x)
&& (0..SIZE_Z as i32).contains(&position.z)
&& position.y == BOARD_Y
{
let index = position.x as usize + position.z as usize * SIZE_X;
if !server.state.board[index] {
client.play_sound(
Ident::new("minecraft:block.note_block.banjo").unwrap(),
SoundCategory::Block,
Vec3::new(position.x, position.y, position.z).as_(),
0.5f32,
1f32,
);
}
server.state.board[index] = true;
}
}
ClientEvent::InteractWithBlock { hand, .. } => {
if hand == Hand::Main {
client.send_message("I said left click, not right click!".italic());
}
}
_ => {}
}
}
if let TrackedData::Player(data) = player.data() {
let sneaking = data.get_pose() == Pose::Sneaking;
if sneaking != server.state.paused {
server.state.paused = sneaking;
client.play_sound(
Ident::new("block.note_block.pling").unwrap(),
SoundCategory::Block,
client.position(),
0.5f32,
if sneaking { 0.5f32 } else { 1f32 },
);
}
}
// Display Playing in green or Paused in red
client.set_action_bar(if server.state.paused {
"Paused".color(Color::RED)
} else {
"Playing".color(Color::GREEN)
});
true
});
if !server.state.paused && server.shared.current_tick() % 2 == 0 {
server
.state
.board_buf
.par_iter_mut()
.enumerate()
.for_each(|(i, cell)| {
let cx = (i % SIZE_X) as i32;
let cz = (i / SIZE_Z) as i32;
let mut live_count = 0;
for z in cz - 1..=cz + 1 {
for x in cx - 1..=cx + 1 {
if !(x == cx && z == cz) {
let i = x.rem_euclid(SIZE_X as i32) as usize
+ z.rem_euclid(SIZE_Z as i32) as usize * SIZE_X;
if server.state.board[i] {
live_count += 1;
}
}
}
}
if server.state.board[cx as usize + cz as usize * SIZE_X] {
*cell = (2..=3).contains(&live_count);
} else {
*cell = live_count == 3;
}
});
mem::swap(&mut server.state.board, &mut server.state.board_buf);
}
let min_y = world.chunks.min_y();
for chunk_x in 0..Integer::div_ceil(&SIZE_X, &16) {
for chunk_z in 0..Integer::div_ceil(&SIZE_Z, &16) {
let chunk = world
.chunks
.get_mut((chunk_x as i32, chunk_z as i32))
.unwrap();
for x in 0..16 {
for z in 0..16 {
let cell_x = chunk_x * 16 + x;
let cell_z = chunk_z * 16 + z;
if cell_x < SIZE_X && cell_z < SIZE_Z {
let b = if server.state.board[cell_x + cell_z * SIZE_X] {
BlockState::GRASS_BLOCK
} else {
BlockState::DIRT
};
chunk.set_block_state(x, (BOARD_Y - min_y) as usize, z, b);
}
}
}
}
}
}
}