`KinematicCharacterControllerOutput` doesn't get attached automatically

[theunrealtarik]

Hi.

This morning I have been trying to get my player jumping mechanics done and my logic was relying on the grounded field from KinematicCharacterControllerOutput. I followed what the documentation says precisely how to add character controllers and so on but to my surprise nothing had worked as I was expecting. Debugging led me to find that my player has no KinematicCharacterControllerOutput attached to it even tho he has KinematicCharacterController which should attach the output component automatically as it says here. So I don't know if I messed things up somewhere or it's just some intern weird bug.

The applied character motion, and the information of whether the character is touching the ground at its final position, can be read with the KinematicCharacterControllerOutput component (inserted automatically to the same entity as the KinematicCharacterController component).

Here's a demo that demonstrates the issue.

[ThierryBerger]

I notice your rigidbody has an incompatible type for the KinematicCharacterController, please change RigidBody::Dynamic for RigidBody::KinematicPositionBased.

From my testing, I confirm that KinematicCharacterControllerOutput doesn't get attached immediately, but it gets attached when a translation is attempted.

To trigger a movement, you can emulate a gravity with the following snippets:

fn control(mut controllers: Query<&mut KinematicCharacterController, With<Player>>) {
    for mut cc in controllers.iter_mut() {
        cc.translation = Some(Vec2::Y * -9f32);
    }
}

app.add_systems(FixedUpdate, control);