Function spawnTick

Parameters

• state: SpawnState

  the mutable spawn state

• dt: number

  delta time since last frame (seconds)

• junctionObjectRefs: RefObject<Group<Object3DEventMap>[]>

  ref to the array of registered junction groups

• cfg: SimConfig

  current simulation configuration

• vehicles: Vehicle[]

  live vehicle array (mutated on spawn)

• carModels: Group<Object3DEventMap>[]

  loaded car model templates

• scene: Scene

  the Three.js scene to spawn into

• junction: JunctionConfig

  the junction layout configuration

• roundaboutControllers: Map<string, RoundaboutController>

  map of active roundabout controllers

• nextId: () => number

  callback that returns the next unique vehicle ID

• getRoutePointsCached: (route: Route) => Tuple3[]

  cached route-point resolver

• findGroupById: (
      groups: Group<Object3DEventMap>[],
      id: string,
  ) => Group<Object3DEventMap> | undefined

  helper to locate a group by its structure ID

• getStructureData: (
      group: Group,
  ) => { id: string; maxDistanceToStopLine: number; type: string } | null

  extracts structure metadata from a group

• getGroupId: (group: Group) => string | null

  extracts the structure ID from a group

• updateVehicleSegment: (v: Vehicle) => void

  callback to refresh a vehicle's current segment