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我試圖在SCNNode上使用SceneKit的applyForce方法。應用程序正在檢測通過觸摸屏觸摸特定節點的時間，並且應該在節點上施加一個力;但是，SCNNode不會移動。我已經在SCNNode上正確設置了dynamic的物理值，並且它對重力做出了響應。SCNNode上的SceneKit applyForce不起作用
override func viewDidLoad() {
...
// retrieve the floor node
let floorNode = SCNScene(named: "art.scnassets/floor.dae")
floorNode?.rootNode.position = SCNVector3(x: 0, y: 0, z:-10)
floorNode?.rootNode.physicsBody = SCNPhysicsBody(type: .static, shape: nil)
scene.rootNode.addChildNode(floorNode!.rootNode)
let treeNode = SCNScene(named: "art.scnassets/tree.dae")
treeNode?.rootNode.position = SCNVector3(x: 0, y: 10, z:-10)
treeNode?.rootNode.physicsBody = SCNPhysicsBody(type: .dynamic, shape: nil)
scene.rootNode.addChildNode(treeNode!.rootNode)
...
}
func handleTap(_ gestureRecognize: UIGestureRecognizer) {
...
// check what nodes are tapped
let p = gestureRecognize.location(in: scnView)
let hitResults = scnView.hitTest(p, options: [:])
// check that we clicked on at least one object
if hitResults.count > 0 {
print("A hit!")
// retrieved the first clicked object
let result: AnyObject = hitResults[0]
result.node.physicsBody?.applyForce(SCNVector3(x:10000,y:1,z:1), asImpulse: true)
result.node.physicsBody?.applyTorque(SCNVector4(x:0,y:1,z:0, w:100.0), asImpulse: true)
}
}