I cant scale a Virtual Object in an other Class swift - swift

Question

Im trying to figure out how to scale a Virtual object in an other class
I tried to make a function in the extension of the Virtual object that looks like this
public func setSize1(_ size: Float, node: SCNNode) -> VirtualObject? {
if let virtualObjectRoot = node as? VirtualObject {
return virtualObjectRoot
}
guard let parent = node.parent else { return nil }
node.scale = SCNVector3(x: size, y: size, z: size)
node.position.y = (0)
return VirtualObject.existingObjectContainingNode(parent)
}
And then i call it with
#IBAction func sliderValueChanged(_ sender: UISlider) {
let newValue = Float(sender.value)
VirtualObject().setSize1(newValue, node: SCNNode)
}
But every time i do this, i get an error like: "Cannot convert value of type 'SCNNode.Type' to expected argument type 'SCNNode'" What is the best way to edit a Node in a other class?

Answer 1

The problem is here:
VirtualObject().setSize1(newValue, node: SCNNode)
You're not passing an object, but a type (SCNNode is the name of a class). You have to pass the SCNNode instance instead.
Edit
To retrieve the node that you want to use:
guard let node = self.childNode(withName: myCachedNodeName, recursively: true) else { return }
VirtualObject().setSize1(newValue, node: node)
Edit 2
Given your needs, I suggest to scale the node using a pinch gesture recognizer. This is how to add it to your scene view controller:
let pinch = UIPinchGestureRecognizer(target: self, action: #selector(pinch(:)))
self.view.addGestureRecognizer(pinch)
Then you have to declare a method that will be executed whenever a pinch gesture is detected:
func pinch(gesture:UIPinchGestureRecognizer) {
let scale = gesture.scale
if gesture.state == .ended {
// Use the scale value to scale you SCNNode
// Alternatively, you could scale your node continuously and not
// only when the gesture is ended. But in this case, remember to
// reset the pinch gesture recognizer's scale value
}
}