Ios 右击时如何旋转到三维立方体的另一面

我使用SceneKit创建了一个3d立方体，并添加了一个识别向右滑动的手势。但是，我不知道在向右滑动时如何将立方体旋转到另一个面。我不希望立方体在滑动时持续旋转，只移动到右侧的另一个面。对不起，有什么困惑

以下是我创建多维数据集的代码：

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)


}

---

您需要使用

SCNAction.rotate

获取节点旋转的当前w值并添加所需的角度量，使用这两个扩展来转换为弧度和从弧度，将my self.shipNode替换为立方体节点，并在需要时更改轴，考虑到

SCInvector4Make

语句中的第一个0是X轴

这是一个例子

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))
}

要向下旋转，只需更改旋转轴 您可以使用此

- (void) handleTap:(UIGestureRecognizer*)gestureRecognize
{

     [self.ship runAction:[SCNAction rotateToAxisAngle:SCNVector4Make(1, 0, 0, [self getRadiansFromAngle:[self getAngleFromRadian:self.ship.rotation.w] + 30]) duration:1]];
}

已更新 使用您的代码 您需要使用

SCNAction.rotate（by:#Float，around:#scinvector3，duration:#duration）

方法，下面是您的需求的完整代码

@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
            }
        }
    }

---

要旋转哪个节点？为根节点旋转的

SCNTransaction

设置动画？谢谢，它可以工作！我还添加了一个只需将度数设置为负数即可向左滑动的选项。我要怎么做才能刷下来？谢谢@Andy检查我的答案是根据你的las要求更新的他们，有效。但是，当我向下轻扫然后向左或向右轻扫时，它会做一个奇怪的旋转。就像它会向下滑动一样，但在向下和向右滑动时，它不会旋转到它旁边的面。我认为这与它的旋转角度有关。你能帮我修一下吗？谢谢我认为这个问题与你开始一个运动有关，在那之后，你开始另一个不同方向的运动，你可以通过两种方式来处理这个问题，一种是在另一个正在执行时阻止一个动作，另一种是在Github中与我共享代码以帮助你完成真正的项目时将这些动作组合在一起@Andy，我已经在Github上发布了代码。链接是：。我希望你明白我的问题是什么，如果不是的话，你可以启动这个应用程序，自己看看。谢谢你的帮助！代码在ViewController下

@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
            }
        }
    }