ios - 当父节点移动时，SceneKit 子物理主体不移动

Question

我有 2 个简单节点(2 个球:一个在另一个之上且不接触)，每个节点都有一个具有相同特性的物理体。下面的是父节点，上面的是子节点。

当我向父节点施加力时，两个节点都在移动，但子节点的物理主体不移动。我激活了 showphysicalshape 选项，我看到 child 的物理体留在原来的位置。

我错过了什么吗？

Class Character3DClass: CharacterClass
{        
    var CharacterNode: SCNNode!
    var CenterBody: SCNNode!

    func InitChar()
    {
        InitBodyParentNode()
        AddCenterBody()
    }

    func InitBodyParentNode()
    {
        CharacterNode.physicsBody = SCNPhysicsBody(type: .dynamic, shape: SCNPhysicsShape(node: CharacterNode, options: [:]))
        CharacterNode.physicsBody?.isAffectedByGravity = false
        CharacterNode.physicsBody?.mass = 1
        CharacterNode.physicsBody?.charge = 0
        CharacterNode.physicsBody?.friction = 0
        CharacterNode.physicsBody?.rollingFriction = 0
        CharacterNode.physicsBody?.restitution = 0
        CharacterNode.physicsBody?.damping = 0
        CharacterNode.physicsBody?.angularDamping = 0

        // Affectation des caractéristiques pour la gestion des collisions
        CharacterNode.physicsBody?.categoryBitMask = eNodePhysics.Player.rawValue
        CharacterNode.physicsBody?.contactTestBitMask = eNodePhysics.Player.rawValue | eNodePhysics.Ennemy.rawValue
        CharacterNode.physicsBody?.collisionBitMask = eNodePhysics.TileBorder.rawValue
    }

    func AddCenterBody()
    {
        CenterBody = SCNNode(geometry: Level3D.Dot.geometry)
        CenterBody.categoryBitMask = eNodePhysics.PlayerCenter.rawValue
        CenterBody.position = SCNVector3.init(0, 3, 0)
        CenterBody.scale = SCNVector3.init(0.4, 0.4, 0.4)

        CenterBody.physicsBody = SCNPhysicsBody(type: .dynamic, shape: SCNPhysicsShape(geometry: CenterBody.geometry!, options: nil))
        CenterBody.physicsBody?.isAffectedByGravity = false
        CenterBody.physicsBody?.mass = 1
        CenterBody.physicsBody?.charge = 0
        CenterBody.physicsBody?.friction = 0
        CenterBody.physicsBody?.rollingFriction = 0
        CenterBody.physicsBody?.restitution = 0
        CenterBody.physicsBody?.damping = 0
        CenterBody.physicsBody?.angularDamping = 0

        CenterBody.physicsBody?.categoryBitMask = eNodePhysics.PlayerCenter.rawValue
        CenterBody.physicsBody?.contactTestBitMask =  eNodePhysics.PlayerCenter.rawValue
        CenterBody.physicsBody?.collisionBitMask = eNodePhysics.NoValue.rawValue

        CharacterNode.addChildNode(CenterBody)
    }
}

Answer 1

您可以使用func resetTransform()方法使物理体与其节点相匹配，但这会消耗一些性能:https://developer.apple.com/documentation/scenekit/scnphysicsbody/1514782-resettransform