grave pumice
I'm trying to query the kinematic character controller output on my player like so
// src/fps_game/controller.rs
pub fn update_physics(
time: Res<Time>,
mut q_player_transform: Query<
(
&Transform,
&InputVector,
&Speed,
&mut Velocity,
&mut KinematicCharacterController,
&KinematicCharacterControllerOutput,
),
With<Player>,
>,
settings: Res<settings::Settings>,
) {
// ...
}
However trying to run this system panics
thread '<unnamed>' panicked at src/fps_game/controller.rs:149:28:
called `Result::unwrap()` on an `Err` value: NoEntities("bevy_ecs::query::state::QueryState<(&bevy_transform::components::transform::
Transform, &fps_test::fps_game::controller::InputVector, &fps_test::fps_game::controller::Speed, &mut fps_test::fps_game::controller:
:Velocity, &mut bevy_rapier3d::control::character_controller::KinematicCharacterController, &bevy_rapier3d::control::character_contro
ller::KinematicCharacterControllerOutput), bevy_ecs::query::filter::With<fps_test::fps_game::controller::Player>>")
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Encountered a panic in system `fps_test::fps_game::controller::update_physics`!
Encountered a panic in system `bevy_app::main_schedule::Main::run_main`!
Removing the KinematicCharacterControllerOutput from the query gets rid of the panic
This is the code for spawning the player
pub fn spawn_player(mut commands: Commands) {
let player = PlayerBundle {
marker: Player,
speed: Speed(10.0),
rigidbody: RigidBody::KinematicPositionBased,
collider: Collider::capsule(
Vec3::new(0.0, -PLAYER_HEIGHT * 0.25, 0.0),
Vec3::new(0.0, PLAYER_HEIGHT * 0.25, 0.0),
PLAYER_HEIGHT * 0.25,
),
controller: KinematicCharacterController::default(),
transform: SpatialBundle {
transform: Transform::from_xyz(0.0, PLAYER_HEIGHT / 2.0, 0.0),
..Default::default()
},
..Default::default()
};
commands.spawn(player).with_children(|parent| {
parent.spawn(PlayerWorldCameraBundle {
marker: PlayerWorldCamera,
camera: Camera3dBundle {
transform: Transform::from_xyz(0., CAMERA_HEIGHT, 20.0),
..Default::default()
},
});
});
}
What's confusing is that the rapier docs say that the output will be automatically inserted on the same entity as the one with the character controller
Is there any example projects with kinematic controller 3d that i can take a look at? there is snippets of code in the rapier docs but no full examples
i basically just want to be able to check if the player is grounded
left portal
So, I don't really know the reasoning behind it, but the example in the bevy rapier3d repo uses an Option to wrap the Output: https://github.com/dimforge/bevy_rapier/blob/master/bevy_rapier3d/examples/character_controller3.rs
fn player_movement(
time: Res<Time>,
mut input: ResMut<MovementInput>,
mut player: Query<(
&mut Transform,
&mut KinematicCharacterController,
Option<&KinematicCharacterControllerOutput>,
)>,
mut vertical_movement: Local<f32>,
mut grounded_timer: Local<f32>,
)
also in that example they use this to check if the player is grounded:
if output.map(|o| o.grounded).unwrap_or(false) {
*grounded_timer = GROUND_TIMER;
*vertical_movement = 0.0;
}
Although it is kind of strange, cuz in their user guide, they don't use an Option? https://rapier.rs/docs/user_guides/bevy_plugin/character_controller/
/* Read the character controller collisions stored in the character controller’s output. */
fn read_character_controller_collisions(
mut character_controller_outputs: Query<&mut KinematicCharacterControllerOutput>,
) {
for mut output in character_controller_outputs.iter_mut() {
for collision in &output.collisions {
// Do something with that collision information.
}
}
}