Tracking two objects at the same time in ARImageTrackingConfiguration - swift

Question

I want to link two 3D models to two different trackers. I snap the tracker to the reference photo, but I don’t understand how tracking two objects at the same time in ARImageTrackingConfiguration
guard let trackedImages = ARReferenceImage.referenceImages(inGroupNamed: "Photos2", bundle: Bundle.main) else {
print("No images available")
return
}
I snap the tracker to the reference photo, but I don’t understand how tracking two objects at the same time in ARImageTrackingConfiguration

Answer 1

You need to put it into ViewController:
class ViewController: UIViewController {
func trackingConfig() {
guard let referenceImages = ARReferenceImage.referenceImages(inGroupNamed: "AR Resources",
bundle: nil)
else {
return
}
let config = ARWorldTrackingConfiguration()
config.detectionImages = referenceImages
let options: ARSession.RunOptions = [.resetTracking,
.removeExistingAnchors]
sceneView.session.run(config, options: options)
}
}
Then create an extension containing renderer method an a switch inside function:
extension ViewController: ARSCNViewDelegate {
func renderer(_ renderer: SCNSceneRenderer,
didAdd node: SCNNode,
for anchor: ARAnchor) {
guard let imageAnchor = anchor as? ARImageAnchor,
let imageName = imageAnchor.referenceImage.name
else {
return
}
let geometryNode = nodeGetter(name: imageName)
node.addChildNode(geometryNode)
}
func nodeGetter(name: String) -> SCNNode {
var node = SCNNode()
switch name {
case "geometry_01": node = geoOne
case "geometry_02": node = geoTwo
default: break
}
return node
}
}