6d6bc2a8b4
This is extracted out of eb8f973646476b4a4926ba644a77e2b3a5772159 and includes some additional changes to remove all references to AppBuilder and fix examples that still used App::build() instead of App::new(). In addition I didn't extract the sub app feature as it isn't ready yet. You can use `git diff --diff-filter=M eb8f973646476b4a4926ba644a77e2b3a5772159` to find all differences in this PR. The `--diff-filtered=M` filters all files added in the original commit but not in this commit away. Co-Authored-By: Carter Anderson <mcanders1@gmail.com>
51 lines
1.3 KiB
Rust
51 lines
1.3 KiB
Rust
use bevy::{log::LogPlugin, prelude::*};
|
|
|
|
fn main() {
|
|
App::new()
|
|
.add_plugin(LogPlugin)
|
|
.add_startup_system(setup.system())
|
|
.add_system(log_names.system().label(LogNamesSystem))
|
|
.add_system(log_person_bundles.system().after(LogNamesSystem))
|
|
.run();
|
|
}
|
|
|
|
#[derive(Debug, Hash, PartialEq, Eq, Clone, SystemLabel)]
|
|
struct LogNamesSystem;
|
|
|
|
#[derive(Debug)]
|
|
struct Name(String);
|
|
|
|
#[derive(Debug)]
|
|
struct Age(usize);
|
|
|
|
#[derive(Debug, Bundle)]
|
|
struct PersonBundle {
|
|
name: Name,
|
|
age: Age,
|
|
}
|
|
|
|
/// Sets up two entities, one with a [Name] component as part of a bundle,
|
|
/// and one entity with [Name] only.
|
|
fn setup(mut commands: Commands) {
|
|
commands.spawn().insert(Name("Steve".to_string()));
|
|
commands.spawn().insert_bundle(PersonBundle {
|
|
name: Name("Bob".to_string()),
|
|
age: Age(40),
|
|
});
|
|
}
|
|
|
|
fn log_names(query: Query<&Name>) {
|
|
info!("Log all entities with `Name` component");
|
|
// this will necessarily have to print both components.
|
|
for name in query.iter() {
|
|
info!("{:?}", name);
|
|
}
|
|
}
|
|
fn log_person_bundles(query: Query<&Name, WithBundle<PersonBundle>>) {
|
|
info!("Log `Name` components from entities that have all components in `PersonBundle`.");
|
|
// this should only print `Name("Bob")`.
|
|
for name in query.iter() {
|
|
info!("{:?}", name);
|
|
}
|
|
}
|