我在SwiftUI的框架内的“ SCNView”中有一个“ SCNCylinder”。我的目标是使圆柱体绕不同的轴并以不同的角度旋转。我有两个(某种)按钮,它们从用户输入的角度分别为180°或90°。我想在不同的轴上旋转它们。我想将圆柱体围绕“ SCNVector3(1,0,0)”旋转180°,并围绕“ SCNVector3(0,0,1)”旋转90°。我已经做了一个可以做到这一点的游乐场。真正的问题是对同一对象进行多次旋转。假设用户先点击180°,然后再点击90°,我希望圆柱体也这样做。但是目前,它可以旋转180°,但是当用户点击90°按钮时会随机旋转。
这是我的代码:
struct ContentView: View {
@State var rotationAngle: Angle = .degrees(0)
@State var rotationAngle2: Angle = .degrees(0)
var body: some View {
VStack{
HStack{
Text("180°").onTapGesture {
self.rotationAngle = .degrees(180)
}
Divider()
Text("90°").onTapGesture {
self.rotationAngle2 = .degrees(90)
}
}
SceneKitView(radius: 0.02, height: 2, angle: $rotationAngle, angle2: $rotationAngle2)
.position(x: 225.0, y: 175)
.frame(width: 300, height: 300, alignment: .center)
}
}
}
struct SceneKitView: UIViewRepresentable {
@Binding var angle: Angle
@Binding var angle2 : Angle
let cylindernode: SCNNode
init(radius: CGFloat, height: CGFloat, angle: Binding<Angle>, angle2: Binding<Angle>) {
let cylinder = SCNCylinder(radius: radius, height: height)
cylinder.firstMaterial?.diffuse.contents = UIColor.green
self.cylindernode = SCNNode(geometry: cylinder)
self.cylindernode.position = SCNVector3(0, 0, 0)
cylindernode.pivot = SCNMatrix4MakeTranslation(0, -1, 0)
self._angle = angle
self._angle2 = angle2
}
func makeUIView(context: UIViewRepresentableContext<SceneKitView>) -> SCNView {
let sceneView = SCNView()
sceneView.scene = SCNScene()
sceneView.autoenablesDefaultLighting = true
sceneView.allowsCameraControl = true
sceneView.scene?.rootNode.addChildNode(cylindernode)
return sceneView
}
func updateUIView(_ sceneView: SCNView, context: UIViewRepresentableContext<SceneKitView>) {
let rotation = SCNAction.rotate(by: CGFloat(angle.radians), around: SCNVector3(1, 0, 0), duration: 3)
let rotation2 = SCNAction.rotate(by: CGFloat(angle2.radians), around: SCNVector3(0, 0, 1), duration: 3)
print(angle.degrees)
print(angle2.degrees)
cylindernode.runAction(rotation)
cylindernode.runAction(rotation2)
}
}
请帮助我解决这个问题。
我不确定如果在同一节点上两次运行Action,但是可以通过以下功能“控制”动画,会发生什么情况:
例如
1。)如果您希望动画并行运行
cylindernode.runAction(SCNAction.group([rotation, rotation2]))
2。)如果您希望动画按顺序运行
cylindernode.runAction[SCNAction.sequence([rotation, rotation2]))