mirror of
https://github.com/bevyengine/bevy
synced 2024-11-29 08:00:20 +00:00
f1fbb668f9
## Objective Add a way to stream BRP requests when the data changes. ## Solution #### BRP Side (reusable for other transports) Add a new method handler type that returns a optional value. This handler is run in update and if a value is returned it will be sent on the message channel. Custom watching handlers can be added with `RemotePlugin::with_watching_method`. #### HTTP Side If a request comes in with `+watch` in the method, it will respond with `text/event-stream` rather than a single response. ## Testing I tested with the podman HTTP client. This client has good support for SSE's if you want to test it too. ## Parts I want some opinions on - For separating watching methods I chose to add a `+watch` suffix to the end kind of like `content-type` headers. A get would be `bevy/get+watch`. - Should watching methods send an initial response with everything or only respond when a change happens? Currently the later is what happens. ## Future work - The `bevy/query` method would also benefit from this but that condition will be quite complex so I will leave that to later. --------- Co-authored-by: Zachary Harrold <zac@harrold.com.au>
71 lines
2 KiB
Rust
71 lines
2 KiB
Rust
//! A Bevy app that you can connect to with the BRP and edit.
|
|
|
|
use bevy::math::ops::cos;
|
|
use bevy::{
|
|
input::common_conditions::input_just_pressed,
|
|
prelude::*,
|
|
remote::{http::RemoteHttpPlugin, RemotePlugin},
|
|
};
|
|
use serde::{Deserialize, Serialize};
|
|
|
|
fn main() {
|
|
App::new()
|
|
.add_plugins(DefaultPlugins)
|
|
.add_plugins(RemotePlugin::default())
|
|
.add_plugins(RemoteHttpPlugin::default())
|
|
.add_systems(Startup, setup)
|
|
.add_systems(Update, remove.run_if(input_just_pressed(KeyCode::Space)))
|
|
.add_systems(Update, move_cube)
|
|
.register_type::<Cube>()
|
|
.run();
|
|
}
|
|
|
|
fn setup(
|
|
mut commands: Commands,
|
|
mut meshes: ResMut<Assets<Mesh>>,
|
|
mut materials: ResMut<Assets<StandardMaterial>>,
|
|
) {
|
|
// circular base
|
|
commands.spawn((
|
|
Mesh3d(meshes.add(Circle::new(4.0))),
|
|
MeshMaterial3d(materials.add(Color::WHITE)),
|
|
Transform::from_rotation(Quat::from_rotation_x(-std::f32::consts::FRAC_PI_2)),
|
|
));
|
|
|
|
// cube
|
|
commands.spawn((
|
|
Mesh3d(meshes.add(Cuboid::new(1.0, 1.0, 1.0))),
|
|
MeshMaterial3d(materials.add(Color::srgb_u8(124, 144, 255))),
|
|
Transform::from_xyz(0.0, 0.5, 0.0),
|
|
Cube(1.0),
|
|
));
|
|
|
|
// light
|
|
commands.spawn((
|
|
PointLight {
|
|
shadows_enabled: true,
|
|
..default()
|
|
},
|
|
Transform::from_xyz(4.0, 8.0, 4.0),
|
|
));
|
|
|
|
// camera
|
|
commands.spawn((
|
|
Camera3d::default(),
|
|
Transform::from_xyz(-2.5, 4.5, 9.0).looking_at(Vec3::ZERO, Vec3::Y),
|
|
));
|
|
}
|
|
|
|
fn move_cube(mut query: Query<&mut Transform, With<Cube>>, time: Res<Time>) {
|
|
for mut transform in &mut query {
|
|
transform.translation.y = -cos(time.elapsed_seconds()) + 1.5;
|
|
}
|
|
}
|
|
|
|
fn remove(mut commands: Commands, query: Query<Entity, With<Cube>>) {
|
|
commands.entity(query.single()).remove::<Cube>();
|
|
}
|
|
|
|
#[derive(Component, Reflect, Serialize, Deserialize)]
|
|
#[reflect(Component, Serialize, Deserialize)]
|
|
struct Cube(f32);
|