How to rotate to another face of 3d cube when swiped right - ios

Question

I created a 3d cube using SceneKit and added a gesture to recognize swiping right. But, I do not know how to rotate the cube to another face when swiped right. I do not want the cube to rotate continuously when swiped, only moving to another face that is on the right side. Sorry for any confusions.
Here is my code where I created cube:
import UIKit
import SceneKit
class ViewController: UIViewController {
// UI
#IBOutlet weak var geometryLabel: UILabel!
#IBOutlet weak var sceneView: SCNView!
// Geometry
var geometryNode: SCNNode = SCNNode()
// Gestures
var currentAngle: Float = 0.0
// MARK: Lifecycle
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
// MARK: Scene
sceneSetup()
}
func sceneSetup() {
let scene = SCNScene()
sceneView.scene = scene
sceneView.allowsCameraControl = false
sceneView.autoenablesDefaultLighting = true
let cameraNode = SCNNode()
cameraNode.camera = SCNCamera()
cameraNode.position = SCNVector3Make(0, 0, 25)
scene.rootNode.addChildNode(cameraNode)
var geometries = [
SCNBox(width: 8.0, height: 8.0, length: 8.0, chamferRadius: 1.0)
]
var materials = [SCNMaterial]()
for i in 1...6 {
let material = SCNMaterial()
if i == 1 { material.diffuse.contents = UIColor(red:0.02, green:0.98, blue:0.98, alpha:1.0) }
if i == 2 { material.diffuse.contents = UIColor(red:0.02, green:0.98, blue:0.98, alpha:1.0) }
if i == 3 { material.diffuse.contents = UIColor(red:0.02, green:0.98, blue:0.98, alpha:1.0) }
if i == 4 { material.diffuse.contents = UIColor(red:0.02, green:0.98, blue:0.98, alpha:1.0) }
if i == 5 { material.diffuse.contents = UIColor(red:0.02, green:0.98, blue:0.98, alpha:1.0) }
if i == 6 { material.diffuse.contents = UIColor(red:0.02, green:0.98, blue:0.98, alpha:1.0) }
materials.append(material)
}
for i in 0..<geometries.count {
let geometry = geometries[i]
let node = SCNNode(geometry: geometry)
node.geometry?.materials = materials
scene.rootNode.addChildNode(node)
}
let swipeRight: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: #selector(respondToSwipeGesture(gesture:)))
swipeRight.direction = .right
sceneView.addGestureRecognizer(swipeRight)
}
Function for swipe right gesture when recognize:
func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizerDirection.right:
print("Swiped Right")
default:
break
}
}
}

Answer 1

You need to use a SCNAction.rotate getting the current w value of the node rotation and adding the amount of angle you want, using this 2 extensions for converting to Radians and from Radians, replace my self.shipNode by your cube node, and change the axis if you need to, taking in account that the first 0 in the SCNVector4Make sentence is X axis
This is an example
extension Int {
var degreesToRadians: Double { return Double(self) * .pi / 180 }
var radiansToDegrees: Double { return Double(self) * 180 / .pi }
}
extension FloatingPoint {
var degreesToRadians: Self { return self * .pi / 180 }
var radiansToDegrees: Self { return self * 180 / .pi }
}
#objc func handleTap(_ gestureRecognize: UIGestureRecognizer) {
//here we rotate the ship node 30 grades in the Y axis each time
self.shipNode?.runAction(SCNAction.rotate(toAxisAngle: SCNVector4Make(0, 1, 0, (self.shipNode?.rotation.w)! + Float(30.degreesToRadians)), duration: 1))
}
To rotate down you only have to change the axis of the rotation
you can use this
- (void) handleTap:(UIGestureRecognizer*)gestureRecognize
{
[self.ship runAction:[SCNAction rotateToAxisAngle:SCNVector4Make(1, 0, 0, [self getRadiansFromAngle:[self getAngleFromRadian:self.ship.rotation.w] + 30]) duration:1]];
}
UPDATED
Using your code
You need to use SCNAction.rotate(by: #Float, around: #SCNVector3, duration: #duration) method instead, below is the full code for your requeriments
#objc func respondToSwipeGesture(gesture: UIGestureRecognizer) {
if let swipeGesture = gesture as? UISwipeGestureRecognizer {
switch swipeGesture.direction {
case UISwipeGestureRecognizerDirection.right:
print("Swiped Right")
geometryNode.runAction(SCNAction.rotate(by: CGFloat(90.degreesToRadians), around: SCNVector3Make(0, 1, 0), duration: 0.2))
case UISwipeGestureRecognizerDirection.left:
print("Swiped Left")
geometryNode.runAction(SCNAction.rotate(by: CGFloat(-90.degreesToRadians), around: SCNVector3Make(0, 1, 0), duration: 0.2))
case UISwipeGestureRecognizerDirection.down:
print("Swiped Down")
geometryNode.runAction(SCNAction.rotate(by: CGFloat(90.degreesToRadians), around: SCNVector3Make(1, 0, 0), duration: 0.2))
default:
break
}
}
}