bevy/examples/app/custom_loop.rs
bjorn3 6d6bc2a8b4 Merge AppBuilder into App (#2531)
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>
2021-07-27 20:21:06 +00:00

29 lines
760 B
Rust

use bevy::prelude::*;
use std::{io, io::BufRead};
struct Input(String);
/// This example demonstrates you can create a custom runner (to update an app manually). It reads
/// lines from stdin and prints them from within the ecs.
fn my_runner(mut app: App) {
println!("Type stuff into the console");
for line in io::stdin().lock().lines() {
{
let mut input = app.world.get_resource_mut::<Input>().unwrap();
input.0 = line.unwrap();
}
app.update();
}
}
fn print_system(input: Res<Input>) {
println!("You typed: {}", input.0);
}
fn main() {
App::new()
.insert_resource(Input(String::new()))
.set_runner(my_runner)
.add_system(print_system.system())
.run();
}