Struct sim::mechanics::driving::DrivingSimState

pub(crate) struct DrivingSimState {
    cars: FixedMap<CarID, Car>,
    queues: HashMap<Traversable, Queue>,
    events: Vec<Event>,
    waiting_to_spawn: BTreeMap<CarID, (Position, Option<PersonID>)>,
    recalc_lanechanging: bool,
    handle_uber_turns: bool,
    time_to_unpark_onstreet: Duration,
    time_to_park_onstreet: Duration,
    time_to_unpark_offstreet: Duration,
    time_to_park_offstreet: Duration,
}

Simulates vehicles!

Fields

cars: FixedMap<CarID, Car>

queues: HashMap<Traversable, Queue>

events: Vec<Event>

waiting_to_spawn: BTreeMap<CarID, (Position, Option<PersonID>)>

recalc_lanechanging: bool

handle_uber_turns: bool

time_to_unpark_onstreet: Duration

time_to_park_onstreet: Duration

time_to_unpark_offstreet: Duration

time_to_park_offstreet: Duration

Implementations

impl DrivingSimState

pub fn new(map: &Map, opts: &SimOptions) -> DrivingSimState

pub fn start_car_on_lane(
    &mut self,
    now: Time,
    params: CreateCar,
    ctx: &mut Ctx<'_>
) -> Option<CreateCar>

None if it worked, otherwise returns the CreateCar unmodified for possible retry.

pub fn vehicle_waiting_to_spawn(
    &mut self,
    id: CarID,
    pos: Position,
    person: Option<PersonID>
)

If start_car_on_lane fails and a retry is scheduled, this is an idempotent way to mark the vehicle as active, but waiting to spawn.

pub fn update_car(
    &mut self,
    id: CarID,
    now: Time,
    ctx: &mut Ctx<'_>,
    trips: &mut TripManager,
    transit: &mut TransitSimState,
    walking: &mut WalkingSimState
)

State transitions for this car:

Crossing -> Queued or WaitingToAdvance Unparking -> Crossing IdlingAtStop -> Crossing Queued -> last step handling (Parking or done) WaitingToAdvance -> try to advance to the next step of the path Parking -> done

State transitions for other cars:

Crossing -> Crossing (recalculate dist/time) Queued -> Crossing

Why is it safe to process cars in any order, rather than making sure to follow the order of queues? Because of the invariant that distances should never suddenly jump when a car has entered/exiting a queue. This car might have reached the router’s end distance, but maybe not – might actually be stuck behind other cars. We have to calculate the distances right now to be sure.

fn update_car_without_distances(
    &mut self,
    car: &mut Car,
    now: Time,
    ctx: &mut Ctx<'_>,
    transit: &mut TransitSimState
) -> bool

fn update_car_with_distances(
    &mut self,
    car: &mut Car,
    dists: &[QueueEntry],
    idx: usize,
    now: Time,
    ctx: &mut Ctx<'_>,
    trips: &mut TripManager,
    transit: &mut TransitSimState,
    walking: &mut WalkingSimState
) -> bool

pub fn delete_car(&mut self, c: CarID, now: Time, ctx: &mut Ctx<'_>) -> Vehicle

Abruptly remove a vehicle from the simulation. They may be in any arbitrary state, like in the middle of a turn or parking.

fn delete_car_internal(
    &mut self,
    car: &mut Car,
    dists: Vec<QueueEntry>,
    idx: usize,
    now: Time,
    ctx: &mut Ctx<'_>
)

fn update_follower(
    &mut self,
    idx_leader: usize,
    dists: &[QueueEntry],
    now: Time,
    ctx: &mut Ctx<'_>
)

After a leader (maybe an active vehicle, maybe a static blockage) gets out of the way, update the follower so that they don’t suddenly jump forwards.

pub fn update_laggy_head(&mut self, id: CarID, now: Time, ctx: &mut Ctx<'_>)

fn trim_last_steps(
    &mut self,
    car: &mut Car,
    now: Time,
    n: usize,
    ctx: &mut Ctx<'_>
)

fn pick_overtaking_lane(&self, car: &Car, map: &Map) -> Option<LaneID>

If the car wants to over-take somebody, what adjacent lane should they use?

• The lane must be in the same direction as the current; no support for crossing the road’s yellow line yet.
• Prefer passing on the left (for DrivingSide::Right) For now, just pick one candidate lane, even if both might be usable.

fn try_start_lc(
    &mut self,
    car: &mut Car,
    front_current_queue: Distance,
    idx_in_current_queue: usize,
    target_lane: LaneID,
    now: Time,
    ctx: &mut Ctx<'_>
)

pub fn collect_events(&mut self) -> Vec<Event>

pub fn handle_live_edits(&mut self, map: &Map)

fn new_crossing_state(&self, ctx: &mut Ctx<'_>, car: &Car)

impl DrivingSimState

pub fn get_unzoomed_agents(&self, now: Time, map: &Map) -> Vec<UnzoomedAgent>

Note the ordering of results is non-deterministic!

pub fn does_car_exist(&self, id: CarID) -> bool

pub fn get_all_draw_cars(
    &self,
    now: Time,
    map: &Map,
    transit: &TransitSimState
) -> Vec<DrawCarInput>

Note the ordering of results is non-deterministic!

pub fn get_single_draw_car(
    &self,
    id: CarID,
    now: Time,
    map: &Map,
    transit: &TransitSimState
) -> Option<DrawCarInput>

This is about as expensive as get_draw_cars_on.

pub fn get_draw_cars_on(
    &self,
    now: Time,
    on: Traversable,
    map: &Map,
    transit: &TransitSimState
) -> Vec<DrawCarInput>

pub fn debug_car_json(&self, id: CarID) -> String

pub fn debug_car_ui(&self, id: CarID) -> String

pub fn debug_lane(&self, id: LaneID)

pub fn agent_properties(&self, id: CarID, now: Time) -> AgentProperties

pub fn get_path(&self, id: CarID) -> Option<&Path>

pub fn get_all_driving_paths(&self) -> Vec<&Path>

pub fn trace_route(&self, now: Time, id: CarID, map: &Map) -> Option<PolyLine>

pub fn percent_along_route(&self, id: CarID) -> f64

pub fn get_owner_of_car(&self, id: CarID) -> Option<PersonID>

pub fn target_lane_penalty(&self, l: LaneID) -> (usize, usize)

pub fn find_trips_to_edited_parking(
    &self,
    spots: BTreeSet<ParkingSpot>
) -> Vec<(AgentID, TripID)>

pub fn find_vehicles_affected_by_live_edits(
    &self,
    closed_intersections: &HashSet<IntersectionID>,
    edited_lanes: &BTreeSet<LaneID>
) -> Vec<(AgentID, TripID)>

Finds vehicles that’re laggy heads on affected parts of the map.

pub fn all_waiting_people(
    &self,
    now: Time,
    delays: &mut BTreeMap<PersonID, Duration>
)

pub fn debug_queue_lengths(&self, l: LaneID) -> Option<(Distance, Distance)>

pub fn get_blocked_by_graph(
    &self,
    now: Time,
    map: &Map,
    intersections: &IntersectionSimState
) -> BTreeMap<AgentID, (Duration, DelayCause)>

fn get_car_front(&self, now: Time, car: &Car) -> Distance

fn wants_to_overtake(&self, car: &Car) -> Option<CarID>

Does the given car want to over-take the vehicle in front of it?

Trait Implementations

impl Clone for DrivingSimState

fn clone(&self) -> DrivingSimState

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'de> Deserialize<'de> for DrivingSimState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Serialize for DrivingSimState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.