Snippet for drawing points in AR within the ARSupportBroadcastViewController

session+Snippet.swift

func session(_ session: ARSession, didUpdate frame: ARFrame) {
    // if we have points - draw one point per frame
    if self.remotePoints.count > 0 {
        let remotePoint: CGPoint = self.remotePoints.removeFirst() // pop the first node every frame
        DispatchQueue.main.async {
            guard let touchRootNode = self.touchRoots.last else { return }
            let sphereNode : SCNNode = SCNNode(geometry: SCNSphere(radius: 0.015))
            sphereNode.position = SCNVector3(-1*Float(remotePoint.x/1000), -1*Float(remotePoint.y/1000), 0)
            sphereNode.geometry?.firstMaterial?.diffuse.contents = self.lineColor
            touchRootNode.addChildNode(sphereNode)  // add point to the active root
        }
    }
}