As Apple states, RoomPlan allows one to
create a 3D model of a room. But what if we ignored room reconstruction and instead enhanced ARKit
by piggy-backing off RoomPlan's underlying object recognition technology. Specifically, for each
CapturedRoom.Object we can add a custom ARAnchor subclass instance.
The RoomObjectReplicator class does exactly that, creating and updating an RoomObjectAnchor for
each object in the captured room. Once you have a replicator instantiated, anchor the objects in
the capture session delegate methods:
func captureSession(_ session: RoomCaptureSession, didAdd room: CapturedRoom) {
replicator.anchor(objects: room.objects, in: session)
}
func captureSession(_ session: RoomCaptureSession, didChange room: CapturedRoom) {
replicator.anchor(objects: room.objects, in: session)
}
func captureSession(_ session: RoomCaptureSession, didUpdate room: CapturedRoom) {
replicator.anchor(objects: room.objects, in: session)
}
func captureSession(_ session: RoomCaptureSession, didRemove room: CapturedRoom) {
replicator.anchor(objects: room.objects, in: session)
}Mirroring room object as anchors allows us to easily integrate other Frameworks such as RealityKit.
The RoomObjectEntity is a custom RealityKit entity that will anchor to RoomObjectAnchors. The
RoomObjectSystem will then resize a box model to match the room object's dimensions.
func session(_ session: ARSession, didAdd anchors: [ARAnchor]) {
view.scene.addRoomObjectEntities(for: anchors)
}
func session(_ session: ARSession, didUpdate anchors: [ARAnchor]) {
view.scene.updateRoomObjectEntities(for: anchors)
}
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