Node group position reset at the beginning of SCNNode.runAction

Question

I have some code that rotates several SCNNodes around the x axis when the screen tapped like this:

func handleTap(gestureRecognize: UIGestureRecognizer) {
    let sceneView = self.view as SCNView

    let slice = self.cubes[0...8]
    let container = SCNNode()
    for node: SCNNode in slice {
        container.addChildNode(node)
    }
    sceneView.scene!.rootNode.addChildNode(container)
    container.runAction(SCNAction.rotateByX(CGFloat(M_PI / 2), y: 0.0, z: 0.0, duration: 1), completionHandler: { () -> Void in
        println("complete")
    })
}

The problem I am facing is that every time this function is called, the nodes, as a rule, reset are in their original position before the action. When the action is finished, they seem to stay in the right place until the screen is repeated. How to make subsequent calls by handleTaprotating them from their current position?

I tried removing nodes from the original parent before adding them to the container, but it has no visible effect.

I also tried using animation

    let spin = CABasicAnimation(keyPath: "rotation")
    spin.fromValue = NSValue(SCNVector4: SCNVector4(x: -1, y: 0, z: 0, w: 0))
    spin.toValue = NSValue(SCNVector4: SCNVector4(x: -1, y: 0, z: 0, w: Float(M_PI_2)))
    spin.duration = 3
    spin.repeatCount = .infinity
    container.addAnimation(spin, forKey: "spin around")

Which had the same effect as the action.

runAction

    container.runAction(action, completionHandler: { () -> Void in
        println("completed rotation")
        for node: SCNNode in slice {
            node.removeFromParentNode()
            sceneView.scene!.rootNode.addChildNode(node)
        }
    })

, .

Answer 1

node node, , node . node node, node.

func handleTap(gestureRecognize: UIGestureRecognizer) {
    let sceneView = self.view as SCNView
    let action = SCNAction.rotateByAngle(CGFloat(M_PI_2), aroundAxis: SCNVector3Make(-1, 0, 0), duration: 1)
    let slice = self.cubes[0...8]
    let container = SCNNode()
    let root = sceneView.scene!.rootNode


    for node: SCNNode in slice {
        container.addChildNode(node)
    }

    root.addChildNode(container)

    container.runAction(action, completionHandler: { () -> Void in
        for node: SCNNode in slice {
            let transform = node.parentNode!.convertTransform(node.transform, toNode: root)
            node.removeFromParentNode()
            node.transform = transform
            root.addChildNode(node)
        }
    })
}

Answer 2

SCNNode - :

let targetRotationRadians: CGFloat = targetRotationAngle * (CGFloat.pi / 180.0)
let rotationAction = SCNAction.rotateTo(x: 0.0, y: targetRotationRadians, z: 0.0, duration: animationDuration, usesShortestUnitArc: true)
yourSCNNode.runAction(rotationAction)

usesShortestUnitArc true SCNAction.rotateTo. , , angular.