Struct bevy_app::App

pub struct App {
    pub world: World,
    pub resources: Resources,
    pub runner: Box<dyn Fn(App)>,
    pub schedule: Schedule,
    pub executor: ParallelExecutor,
    pub startup_schedule: Schedule,
    pub startup_executor: ParallelExecutor,
}

Containers of app logic and data

App store the ECS World, Resources, Schedule, and Executor. They also store the "run" function of the App, which by default executes the App schedule once. Apps are constructed using the builder pattern.

Example

Here is a simple "Hello World" Bevy app:

use bevy_app::prelude::*;
use bevy_ecs::prelude::*;

fn main() {
   App::build()
       .add_system(hello_world_system.system())
       .run();
}

fn hello_world_system() {
   println!("hello world");
}

Fields

world: World

resources: Resources

runner: Box<dyn Fn(App)>

schedule: Schedule

executor: ParallelExecutor

startup_schedule: Schedule

startup_executor: ParallelExecutor

Implementations

impl App

pub fn build() -> AppBuilder

pub fn update(&mut self)

pub fn run(self)

Trait Implementations

impl Default for App

fn default() -> Self

Returns the "default value" for a type.