3 unstable releases
0.2.1 | Feb 5, 2024 |
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0.2.0 |
|
0.1.1 | Apr 24, 2023 |
0.1.0 | Apr 24, 2023 |
#1599 in Game dev
25KB
439 lines
bevy-trait-resource
A way to get resources that implements a specific trait.
Bevy Version | Crate Version |
---|---|
0.12 | 0.2 |
0.11 | --- |
0.10 | 0.1 |
Note
This crate is highly experimental.
The code is derived and heavily relies on previous work done in bevy-trait-query.
Use
use bevy::prelude::*;
use bevy_trait_resource::{trait_resource, TraitResourceExt};
#[trait_resource]
pub trait IncrementTrait {
fn value(&self) -> i32;
fn increment(&mut self);
}
#[derive(Resource, Default)]
struct NumberValueResource {
value: i32,
}
impl IncrementTrait for NumberValueResource {
// Trait implementation...
}
pub fn increment_value_system(world: &mut World) {
for res_opt in world.get_resources_trait_mut::<dyn IncrementTrait>() {
if let Some(res) = res_opt {
res.increment();
}
}
}
struct SomePlugin;
impl Plugin for SomePlugin {
fn build(&self, app: &mut App) {
app.init_resource_as::<dyn IncrementTrait, NumberValueResource>();
app.add_systems(Update, increment_value_system);
}
}
You can also register a resource to multiple traits.
impl Plugin for SomePlugin {
fn build(&self, app: &mut App) {
app.init_resource::<NumberValueResource>();
app.register_resource_as::<dyn IncrementTrait, NumberValueResource>()
.register_resource_as::<dyn SomeOtherTrait, NumberValueResource>();
}
}
Unregistering.
app.unregister_resource_from_trait::<dyn IncrementTrait, NumberValueResource>();
Dependencies
~25MB
~465K SLoC