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Hello, I tried to implement a game in arkit, when user tap the screen, the bullet will be fired from the touched position. I know how to get 2D position on the screen as below void HandleTapGesture(UITapGestureRecognizer sender) { SCNView areaPanned = sender.View as SCNView; CGPoint point = sender.LocationInView(areaPanned); but I don't know how to transfer this position into the world position. Then I can use it in below scenario let bullet = SCNNode(geometry: SCNSphere(radius: 0.08)) bullet.position = ? That position type is open var position: SCNVector3 Can anyone share any opinion? Many thanks.