Meet TabletopKit for visionOS

// Make a rectangular table.

let entity = try! Entity.load(named: "table", in: table_Top_KitBundle)
let table: Tabletop = .rectangular(entity: entity)

// Place 3 seats around the table, facing the center.

static let seatPoses: [TableVisualState.Pose2D] = [
  .init(position: .init(x: 0, y: Double(GameMetrics.tableDimensions.z)),
        rotation: .degrees(0)),
  .init(position: .init(x: -Double(GameMetrics.tableDimensions.x), y: 0),
        rotation: .degrees(-90)),
  .init(position: .init(x: Double(GameMetrics.tableDimensions.x), y: 0),
        rotation: .degrees(90))
]

// Define an object that describes a pawn for each player.

struct PlayerPawn: EntityEquipment {
  let id: ID
  let entity: Entity
  var initialState: BaseEquipmentState

  init(id: ID, seat: PlayerSeat, pose: TableVisualState.Pose2D, entity: Entity) {
    self.id = id
    self.entity = entity
    initialState = .init(seatControl: .restricted([seat.id]),
                pose: pose,
                entity: entity)
  }
}

// Define an object that describes a tile on the conveyor belt

struct ConveyorTile: Equipment {
  enum Category: String {
    case red
    case green
    case grey
  }
   
  let id: ID
  let category: ConveyorTile.Category
  let initialState: BaseEquipmentState

  init(id: ID, boardID: EquipmentIdentifier, position: TableVisualState.Point2D, category: ConveyorTile.Category) {
    self.id = id
    self.category = category
    initialState = .init(parentID: boardID,
              pose: .init(position: position, rotation: .init()),
              boundingBox: .init(center: .zero, size: .init(x: 0.06, y: 0, z: 0.06)))

// The view contains all the content in the game.

RealityView { (content: inout RealityViewContent) in
  content.entities.append(loadedGame.renderer.root)
}.tabletopGame(loadedGame.tabletop, parent: loadedGame.renderer.root) { _ in
  GameInteraction(game: loadedGame)
}


// Define an object that manages player interactions.

struct GameInteraction: TabletopInteraction {
  func update(context: TabletopKit.TabletopInteractionContext, 
                value: TabletopKit.TabletopInteractionValue) {
    switch value.phase {
      //...
  }

// Respond to interaction updates.

func update(context: TabletopKit.TabletopInteractionContext, 
              value: TabletopKit.TabletopInteractionValue) {
  switch value.phase {
    //...
    case .ended: {
      guard let dst = value.proposedDestination.equipmentID else {
        return
      }
      context.addAction(.moveEquipment(matching: value.startingEquipmentID, childOf: dst))
    }
 }

// Respond to interaction updates.

  func update(context: TabletopKit.TabletopInteractionContext, 
                value: TabletopKit.TabletopInteractionValue) {
    switch value.gesturePhase {
      //...
      case .ended: {
        if let die = game.tabletop.equipment(of: Die.self, 
                                       matching: value.startingEquipmentID) {
          if let audioLibraryComponent = die.entity.components[AudioLibraryComponent.self] {
            if let soundResource = audioLibraryComponent.resources["dieSoundShort.mp3"] {
              die.entity.playAudio(soundResource)
            }
          }
        }
      }
    }
  }

// Set up multiplayer using SharePlay.
// Provide a button to begin SharePlay.

import GroupActivities
func shareplayButton() -> some View {
  Button("SharePlay", systemImage: "shareplay") {
  Task {try! await Activity().activate() }
  }
}


// After joining the SharePlay session, start multiplayer.

    sessionTask = Task.detached { @MainActor in
      for await session in Activity.sessions() {
        tabletopGame.coordinateWithSession(session)
      }
    }