📦 bevyengine / bevy

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71//! Shows how to trigger force-feedback, making gamepads rumble when buttons are
//! pressed.

use bevy::{
    input::gamepad::{Gamepad, GamepadRumbleIntensity, GamepadRumbleRequest},
    prelude::*,
};
use core::time::Duration;

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_systems(Update, gamepad_system)
        .run();
}

fn gamepad_system(
    gamepads: Query<(Entity, &Gamepad)>,
    mut rumble_requests: MessageWriter<GamepadRumbleRequest>,
) {
    for (entity, gamepad) in &gamepads {
        if gamepad.just_pressed(GamepadButton::North) {
            info!(
                "North face button: strong (low-frequency) with low intensity for rumble for 5 seconds. Press multiple times to increase intensity."
            );
            rumble_requests.write(GamepadRumbleRequest::Add {
                gamepad: entity,
                intensity: GamepadRumbleIntensity::strong_motor(0.1),
                duration: Duration::from_secs(5),
            });
        }

        if gamepad.just_pressed(GamepadButton::East) {
            info!("East face button: maximum rumble on both motors for 5 seconds");
            rumble_requests.write(GamepadRumbleRequest::Add {
                gamepad: entity,
                duration: Duration::from_secs(5),
                intensity: GamepadRumbleIntensity::MAX,
            });
        }

        if gamepad.just_pressed(GamepadButton::South) {
            info!("South face button: low-intensity rumble on the weak motor for 0.5 seconds");
            rumble_requests.write(GamepadRumbleRequest::Add {
                gamepad: entity,
                duration: Duration::from_secs_f32(0.5),
                intensity: GamepadRumbleIntensity::weak_motor(0.25),
            });
        }

        if gamepad.just_pressed(GamepadButton::West) {
            info!("West face button: custom rumble intensity for 5 second");
            rumble_requests.write(GamepadRumbleRequest::Add {
                gamepad: entity,
                intensity: GamepadRumbleIntensity {
                    // intensity low-frequency motor, usually on the left-hand side
                    strong_motor: 0.5,
                    // intensity of high-frequency motor, usually on the right-hand side
                    weak_motor: 0.25,
                },
                duration: Duration::from_secs(5),
            });
        }

        if gamepad.just_pressed(GamepadButton::Start) {
            info!("Start button: Interrupt the current rumble");
            rumble_requests.write(GamepadRumbleRequest::Stop { gamepad: entity });
        }
    }
}