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>
72 lines
2.0 KiB
Rust
72 lines
2.0 KiB
Rust
//! A Bevy app that you can connect to with the BRP and edit.
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use bevy::math::ops::cos;
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use bevy::{
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input::common_conditions::input_just_pressed,
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prelude::*,
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remote::{http::RemoteHttpPlugin, RemotePlugin},
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};
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use serde::{Deserialize, Serialize};
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.add_plugins(RemotePlugin::default())
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.add_plugins(RemoteHttpPlugin::default())
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.add_systems(Startup, setup)
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.add_systems(Update, remove.run_if(input_just_pressed(KeyCode::Space)))
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.add_systems(Update, move_cube)
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.register_type::<Cube>()
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.run();
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}
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fn setup(
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mut commands: Commands,
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mut meshes: ResMut<Assets<Mesh>>,
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mut materials: ResMut<Assets<StandardMaterial>>,
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) {
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// circular base
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commands.spawn((
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Mesh3d(meshes.add(Circle::new(4.0))),
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MeshMaterial3d(materials.add(Color::WHITE)),
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Transform::from_rotation(Quat::from_rotation_x(-std::f32::consts::FRAC_PI_2)),
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));
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// cube
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commands.spawn((
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Mesh3d(meshes.add(Cuboid::new(1.0, 1.0, 1.0))),
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MeshMaterial3d(materials.add(Color::srgb_u8(124, 144, 255))),
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Transform::from_xyz(0.0, 0.5, 0.0),
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Cube(1.0),
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));
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// light
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commands.spawn((
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PointLight {
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shadows_enabled: true,
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..default()
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},
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Transform::from_xyz(4.0, 8.0, 4.0),
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));
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// camera
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commands.spawn((
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Camera3d::default(),
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Transform::from_xyz(-2.5, 4.5, 9.0).looking_at(Vec3::ZERO, Vec3::Y),
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));
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}
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fn move_cube(mut query: Query<&mut Transform, With<Cube>>, time: Res<Time>) {
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for mut transform in &mut query {
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transform.translation.y = -cos(time.elapsed_seconds()) + 1.5;
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}
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}
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fn remove(mut commands: Commands, query: Query<Entity, With<Cube>>) {
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commands.entity(query.single()).remove::<Cube>();
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}
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#[derive(Component, Reflect, Serialize, Deserialize)]
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#[reflect(Component, Serialize, Deserialize)]
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struct Cube(f32);
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