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add basic example of a custom update loop (#799)
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2 changed files with 35 additions and 0 deletions
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@ -148,6 +148,10 @@ path = "examples/3d/texture.rs"
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name = "z_sort_debug"
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path = "examples/3d/z_sort_debug.rs"
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[[example]]
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name = "custom_loop"
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path = "examples/app/custom_loop.rs"
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[[example]]
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name = "empty_defaults"
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path = "examples/app/empty_defaults.rs"
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31
examples/app/custom_loop.rs
Normal file
31
examples/app/custom_loop.rs
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@ -0,0 +1,31 @@
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use bevy::prelude::*;
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use std::{io, io::BufRead};
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struct Input(String);
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/// This example demonstrates you can create a custom runner (to update an app manually). It reads
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/// lines from stdin and prints them from within the ecs.
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fn my_runner(mut app: App) {
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app.initialize();
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println!("Type stuff into the console");
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for line in io::stdin().lock().lines() {
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{
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let mut input = app.resources.get_mut::<Input>().unwrap();
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input.0 = line.unwrap();
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}
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app.update();
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}
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}
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fn print_system(input: Res<Input>) {
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println!("You typed: {}", input.0);
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}
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fn main() {
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App::build()
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.add_resource(Input(String::new()))
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.set_runner(my_runner)
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.add_system(print_system.system())
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.run();
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}
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