Easy toggler for Avian's PhysicsDebugPlugin

avian_physics_debug_toggler.rs

use avian2d::prelude::{PhysicsDebugPlugin, PhysicsGizmos};
use bevy::{input::common_conditions::input_just_pressed, prelude::*};

pub mod prelude {
    pub use super::PhysicsDebugToggle;
}

/// Controls if we run avians physicsdebug plugin to draw gizmos.
/// Field has a nice name so it shows up better in the egui resource inspector.
#[derive(Resource, Reflect, Default)]
pub struct PhysicsDebugToggle {
    pub draw_physics_debug: bool,
}

pub fn plugin(app: &mut App) {
    app.add_plugins(PhysicsDebugPlugin::default());
    app.init_resource::<PhysicsDebugToggle>();
    app.add_systems(
        Update,
        (
            physics_debug_res_changed.run_if(resource_changed::<PhysicsDebugToggle>),
            toggle_physics_debug.run_if(input_just_pressed(KeyCode::F11)),
        ),
    );
}

fn toggle_physics_debug(mut res: ResMut<PhysicsDebugToggle>) {
    res.draw_physics_debug = !res.draw_physics_debug;
}

fn physics_debug_res_changed(
    toggle: ResMut<PhysicsDebugToggle>,
    mut gcs: ResMut<GizmoConfigStore>,
) {
    let gc = gcs.config_mut::<PhysicsGizmos>().0;
    gc.enabled = toggle.draw_physics_debug;
}