valence/examples/raycast.rs

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use std::net::SocketAddr;
use std::sync::atomic::{AtomicUsize, Ordering};
use log::LevelFilter;
use valence::async_trait;
use valence::block::{BlockPos, BlockState};
use valence::chunk::UnloadedChunk;
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use valence::client::{default_client_event, GameMode};
use valence::config::{Config, ServerListPing};
use valence::dimension::DimensionId;
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use valence::entity::{EntityId, EntityKind, TrackedData};
use valence::player_list::PlayerListId;
use valence::server::{Server, SharedServer, ShutdownResult};
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use valence::spatial_index::RaycastHit;
use valence::text::{Color, TextFormat};
use valence::util::from_yaw_and_pitch;
use vek::Vec3;
pub fn main() -> ShutdownResult {
env_logger::Builder::new()
.filter_module("valence", LevelFilter::Trace)
.parse_default_env()
.init();
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valence::start_server(
Game {
player_count: AtomicUsize::new(0),
},
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None,
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)
}
struct Game {
player_count: AtomicUsize,
}
const MAX_PLAYERS: usize = 10;
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const SPAWN_POS: BlockPos = BlockPos::new(0, 100, -5);
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const PLAYER_EYE_HEIGHT: f64 = 1.62;
// TODO
// const PLAYER_SNEAKING_EYE_HEIGHT: f64 = 1.495;
#[async_trait]
impl Config for Game {
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type ServerState = Option<PlayerListId>;
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type ClientState = EntityId;
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/// `true` for entities that have been intersected with.
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type EntityState = bool;
type WorldState = ();
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type ChunkState = ();
type PlayerListState = ();
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fn max_connections(&self) -> usize {
// We want status pings to be successful even if the server is full.
MAX_PLAYERS + 64
}
async fn server_list_ping(
&self,
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_server: &SharedServer<Self>,
_remote_addr: SocketAddr,
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_protocol_version: i32,
) -> ServerListPing {
ServerListPing::Respond {
online_players: self.player_count.load(Ordering::SeqCst) as i32,
max_players: MAX_PLAYERS as i32,
description: "Hello Valence!".color(Color::AQUA),
favicon_png: Some(include_bytes!("../assets/favicon.png")),
}
}
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fn init(&self, server: &mut Server<Self>) {
let (world_id, world) = server.worlds.insert(DimensionId::default(), ());
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server.state = Some(server.player_lists.insert(()).0);
let size = 5;
for z in -size..size {
for x in -size..size {
world.chunks.insert([x, z], UnloadedChunk::default(), ());
}
}
world.chunks.set_block_state(SPAWN_POS, BlockState::BEDROCK);
const SHEEP_COUNT: usize = 10;
for i in 0..SHEEP_COUNT {
let offset = (i as f64 - (SHEEP_COUNT - 1) as f64 / 2.0) * 1.25;
let (_, sheep) = server.entities.insert(EntityKind::Sheep, false);
sheep.set_world(world_id);
sheep.set_position([offset + 0.5, SPAWN_POS.y as f64 + 1.0, 0.0]);
sheep.set_yaw(180.0);
sheep.set_head_yaw(180.0);
}
}
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fn update(&self, server: &mut Server<Self>) {
let (world_id, world) = server.worlds.iter_mut().next().unwrap();
server.clients.retain(|_, client| {
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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;
}
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match server
.entities
.insert_with_uuid(EntityKind::Player, client.uuid(), false)
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{
Some((id, _)) => client.state = id,
None => {
client.disconnect("Conflicting UUID");
return false;
}
}
client.spawn(world_id);
client.set_flat(true);
client.set_game_mode(GameMode::Creative);
client.teleport(
[
SPAWN_POS.x as f64 + 0.5,
SPAWN_POS.y as f64 + 1.0,
SPAWN_POS.z as f64 + 0.5,
],
0.0,
0.0,
);
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client.set_player_list(server.state.clone());
if let Some(id) = &server.state {
server.player_lists.get_mut(id).insert(
client.uuid(),
client.username(),
client.textures().cloned(),
client.game_mode(),
0,
None,
);
}
client.send_message(
"Look at a sheep to change its ".italic()
+ "color".italic().color(Color::GREEN)
+ ".",
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);
}
if client.is_disconnected() {
self.player_count.fetch_sub(1, Ordering::SeqCst);
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if let Some(id) = &server.state {
server.player_lists.get_mut(id).remove(client.uuid());
}
server.entities.remove(client.state);
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return false;
}
let client_pos = client.position();
let origin = Vec3::new(client_pos.x, client_pos.y + PLAYER_EYE_HEIGHT, client_pos.z);
let direction = from_yaw_and_pitch(client.yaw() as f64, client.pitch() as f64);
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let only_sheep = |hit: &RaycastHit| {
server
.entities
.get(hit.entity)
.map_or(false, |e| e.kind() == EntityKind::Sheep)
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};
if let Some(hit) = world.spatial_index.raycast(origin, direction, only_sheep) {
if let Some(e) = server.entities.get_mut(hit.entity) {
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e.state = true;
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}
}
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while default_client_event(client, server.entities.get_mut(client.state).unwrap())
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.is_some()
{}
true
});
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for (_, e) in server.entities.iter_mut() {
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let intersected = e.state;
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if let TrackedData::Sheep(sheep) = &mut e.data_mut() {
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if intersected {
sheep.set_color(5);
} else {
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sheep.set_color(0);
}
}
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e.state = false;
}
}
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}