让一个球从网（子节点）中掉落并做一个嗖嗖运动？ (PhysicsBody/ARKit)

Question

想知道如何让篮球落网并做出嗖嗖的动作吗？球上已经有重力，但由于形状的原因，它不会完全掉入网内。我需要以某种方式使球网变得灵活，以允许球（球体）从篮筐顶部进入时通过。球只在下降的 1/3 处停止。我正在 Xcode 上试验 iOS ARKit (SceneKit)。谢谢！

球代码。

let ball = SCNSphere(radius: 0.15)

let material = SCNMaterial()
material.diffuse.contents = UIImage(named: "basketballSkin.png")
ball.materials = [material]

let ballNode = SCNNode(geometry: ball)
ballNode.position = cameraPosition

let physicsShape = SCNPhysicsShape(node: ballNode, options: nil)
let physicsBody = SCNPhysicsBody(type: .dynamic, shape: physicsShape)

ballNode.physicsBody = physicsBody

let forceVector:Float = 6
ballNode.physicsBody?.applyForce(SCNVector3(x: cameraOrientation.x * forceVector,y: cameraOrientation.y * forceVector ,z: cameraOrientation.z * forceVector), asImpulse: true)

sceneView.scene.rootNode.addChildNode(ballNode)

篮网代码，篮板节点除外。

func addBackboard(){
guard let backboardScene = SCNScene(named: "art.scnassets/hoop.scn") else{
    return
}
    guard let backboardNode = backboardScene.rootNode.childNode(withName: "backboard", recursively: false) else{
        return
}

    backboardNode.position = SCNVector3(x: 0,y: 0.5,z: -3)

    let physicsShape = SCNPhysicsShape(node : backboardNode, options: [SCNPhysicsShape.Option.type: SCNPhysicsShape.ShapeType.concavePolyhedron])
    let physicsBody = SCNPhysicsBody(type: .static, shape: physicsShape)

    backboardNode.physicsBody = physicsBody

    sceneView.scene.rootNode.addChildNode(backboardNode)
    currentNode = backboardNode

-路德

Answer 1

两个值得尝试的解决方案。一个非常酷的方法是用 Particle System 创建网络，这不是经典的网络，你可以放置更有创意、复杂和生动的东西，例如。网可以因风而移动，然后因球的撞击而改变

其他解决方案可以创建一个节点序列，代表球经过时网所遭受的不同变化，该序列应该在球接触网内的某个透明节点时开始。

好看，好挑战

让一个球从网（子节点）中掉落并做一个嗖嗖运动？ (PhysicsBody/ARKit)

Making a ball fall through a net (childnode) and make a swish movement? (PhysicsBody/ARKit)

ios

swift

xcode

scenekit

arkit