长按可向前移动SCNNode

时间:2019-03-06 01:49:26

标签: swift touch nodes scenekit move

当用户长按屏幕时,我一直试图将多维数据集向前移动。我无法使其平稳移动。有什么方法可以仅将其向前移动(沿负方向)并更新场景中每一帧的位置?

这是我到目前为止所拥有的:

var carLocation = SCNVector3(x:0, y: 0, z:-0.01) 

func setupScene() {
        sceneView = self.view as? SCNView
        scene = SCNScene(named: "art.scnassets/Map.scn")
        sceneView.scene = scene
        let holdRecognizer = UILongPressGestureRecognizer()
        holdRecognizer.addTarget(self, action: #selector(GameViewController.hold(recognizer:)))
        sceneView.addGestureRecognizer(holdRecognizer)
    }

 @objc func hold(recognizer: UILongPressGestureRecognizer) {
        print("Held down!")
        let position = recognizer.location(in: sceneView)
        carLocation = SCNVector3(x:0, y: 0, z:-0.01)
        carNode.physicsBody?.velocity += carLocation
    }

1 个答案:

答案 0 :(得分:0)

我对您的印刷品进行了计数,以便您可以看到LongPress会重复自己……“很多”,这可能不是您长期想要的。因此,假设您创建了以下内容:

let p = SCNPhysicsBody(type: .dynamic, shape: nil)
p.isAffectedByGravity = false
shipNode.physicsBody = p

这将使您的对象平滑地前后移动。

@objc func hold(recognizer: UILongPressGestureRecognizer) {
    print("Held down! \(count)")
    count += 1
    shipNode.physicsBody?.velocity = SCNVector3Make(0.0, 0, 0.51) 
}
@objc func handleTap(_ gestureRecognize: UIGestureRecognizer) {
    shipNode.physicsBody?.velocity = SCNVector3Make(0.0, 0, -0.51)
}

除非那里有很多物体,否则我看不出它变慢的任何原因。设置scnView.showsStatistics = true可以查看您的FPS。希望您不是要在模拟器中运行Scenekit吗?