Accessing App Resources Outside of Systems?

[pulsar tiger]

I want to be able to access application resources in regular old functions. Is there a way to do this?

Basically, a way to access them without adding them as a system to the App::new() function.

[burnt summit]

you mean by having still access to the app? like app.world.resource::<T>()?

[pulsar tiger]

Yeah, having access to the app, even in functions that are not passed as systems to App::new().

[burnt summit]

that should work then, right?

[pulsar tiger]

Can I have a code example?I don't quite understand.

[burnt summit]

app.world.resource::<type of the resource>()
and the mut version
app.world.resource_mut::<type of the resource>()
These fetch the resource having an app instance.

[pulsar tiger]

How are you getting app!?

use bevy::prelude::*;

/* Code for MyResource */

fn main() {
  App::new()
    .insert_resource(MyResource::new())
    /* New App Code */
    .run();
}

fn some_random_function_not_added_as_a_system() {
  /* Code for accessing MyResource from App!? How to do that... */
}

@burnt summit

Can you fill in the gaps for me?

I really need a full-ish example to help.

Like, not an entire game, just like a simple 15 line main.rs file.

Something simple, but complete.