I have a simple question. If I wanted to start a game and place the board right in front of me:
gameBoard!.position = SCNVector3(0, 0, -0.6)
This works until I leave the game and come back again. Can I show the game board in exact same position in front of camera or 0.6m in front of me? I might have physically moved to another position.
This should be possible using the option resetTracking when you call run on your ARSession again.
Example:
if let configuration = sceneView.session.configuration {
sceneView.session.run(configuration,
options: .resetTracking)
}
To reset ARSession in ARKit framework is quite easy:
class ViewController: UIViewController, ARSCNViewDelegate, ARSessionDelegate {
@IBOutlet var arView: ARSCNView!
@IBOutlet weak var sessionInfoLabel: UILabel!
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let configuration = ARWorldTrackingConfiguration()
configuration.planeDetection = [.horizontal, .vertical]
arView.session.run(configuration)
arView.session.delegate = self
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
arView.session.pause()
}
func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
guard let planeAnchor = anchor as? ARPlaneAnchor else {
return
}
let plane = Plane(anchor: planeAnchor, in: arView)
node.addChildNode(plane)
}
func sessionInterruptionEnded(_ session: ARSession) {
resetSessionTracking()
sessionInfoLabel.text = "ARSession's interruption has ended"
}
private func resetSessionTracking() {
let config = ARWorldTrackingConfiguration()
config.planeDetection = [.vertical, .horizontal]
arView.scene.rootNode.enumerateChildNodes { (childNode, _) in
childNode.removeFromParentNode()
}
arView.session.run(config, options: [.removeExistingAnchors,
.resetTracking, ])
}
}
Hope this helps.