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//! Demonstrates the creation and registration of a custom plugin group.
//! [`PluginGroup`]s are a way to group sets of plugins that should be registered together.
use bevy::{app::PluginGroupBuilder, prelude::*};
fn main() {
App::new()
.add_plugins((
// Two PluginGroups that are included with bevy are DefaultPlugins and MinimalPlugins
DefaultPlugins,
// Adding a plugin group adds all plugins in the group by default
HelloWorldPlugins,
))
// You can also modify a PluginGroup (such as disabling plugins) like this:
// .add_plugins(
// HelloWorldPlugins
// .build()
// .disable::<PrintWorldPlugin>()
// .add_before::<PrintHelloPlugin, _>(
// bevy::diagnostic::LogDiagnosticsPlugin::default(),
// ),
// )
.run();
}
/// A group of plugins that produce the "hello world" behavior
pub struct HelloWorldPlugins;
impl PluginGroup for HelloWorldPlugins {
fn build(self) -> PluginGroupBuilder {
PluginGroupBuilder::start::<Self>()
.add(PrintHelloPlugin)
.add(PrintWorldPlugin)
}
}
struct PrintHelloPlugin;
impl Plugin for PrintHelloPlugin {
fn build(&self, app: &mut App) {
app.add_systems(Update, print_hello_system);
}
}
fn print_hello_system() {
info!("hello");
}
struct PrintWorldPlugin;
impl Plugin for PrintWorldPlugin {
fn build(&self, app: &mut App) {
app.add_systems(Update, print_world_system);
}
}
fn print_world_system() {
info!("world");
}