Question

如何在节点树中的不同层次结构的节点之间建立联系，例如场景中的节点（球）和另一个节点的子节点（墙）。

我试图建造一个有4个墙的板，它是板的子节点。然后我在板节点上添加了一个球（我也尝试让球在场景中）让它移动。在定义了物理体之后，我仍然无法得到联系。

这是我的代码：

class GameScene: SKScene {

    let plate = SKSpriteNode ()
    let wall1 = SKSpriteNode ()
    let wall2 = SKSpriteNode ()
    let wall3 = SKSpriteNode ()
    let wall4 = SKSpriteNode ()
    var ball = SKShapeNode ()

override func didMove(to view: SKView) {

    self.backgroundColor = .white


    plate.size = CGSize (width: self.size.width * 0.6 , height: self.size.width * 0.6)
    plate.position = CGPoint (x: self.size.width / 2 , y: self.size.height / 2 )
    plate.color = .orange
    plate.zPosition = 0
    self.addChild(plate)

    plate.physicsBody = SKPhysicsBody (edgeLoopFrom: plate.frame)
    plate.physicsBody?.isDynamic = false
    plate.physicsBody?.friction = 0
    plate.physicsBody?.restitution = 1
    plate.physicsBody?.affectedByGravity = false
    plate.physicsBody?.categoryBitMask = 1
    plate.physicsBody?.contactTestBitMask = 0
    plate.physicsBody?.collisionBitMask = 0


    wall1.size = CGSize (width: plate.size.width * 0.1, height: plate.size.height)
    wall1.position = CGPoint (x: plate.size.width / 2, y: 0 )
    wall1.color = .gray
    wall1.zPosition = 2
    plate.addChild(wall1)

    wall1.physicsBody = SKPhysicsBody (edgeLoopFrom: wall1.frame)


    wall2.size = CGSize (width: plate.size.width * 0.1, height: plate.size.height)
    wall2.position = CGPoint (x: 0, y: plate.size.height / 2 )
    wall2.zRotation = plate.zRotation + .pi/2
    wall2.color = .yellow
    wall2.zPosition = 2
    plate.addChild(wall2)

    wall2.physicsBody = SKPhysicsBody (edgeLoopFrom: wall2.frame)

    wall3.size = CGSize (width: plate.size.width * 0.1, height: plate.size.height)
    wall3.position = CGPoint (x: -plate.size.width / 2, y: 0 )
    wall3.color = .cyan
    wall3.zPosition = 2
    plate.addChild(wall3)

    wall3.physicsBody = SKPhysicsBody (edgeLoopFrom: wall3.frame)

    wall4.size = CGSize (width: plate.size.width * 0.1, height: plate.size.height)
    wall4.position = CGPoint (x: 0, y: -plate.size.height / 2 )
    wall4.zRotation = plate.zRotation + .pi/2
    wall4.color = .magenta
    wall4.zPosition = 2
    plate.addChild(wall4)

    wall4.physicsBody = SKPhysicsBody (edgeLoopFrom: wall4.frame)
    wall4.physicsBody?.isDynamic = false
    wall4.physicsBody?.friction = 0
    wall4.physicsBody?.restitution = 1
    wall4.physicsBody?.affectedByGravity = false
    wall4.physicsBody?.categoryBitMask = 1
    wall4.physicsBody?.contactTestBitMask = 0
    wall4.physicsBody?.collisionBitMask = 0

    ball = SKShapeNode (circleOfRadius: 10)
    ball.strokeColor = .black
    ball.lineWidth = 2
    ball.fillColor = .blue
    ball.position = CGPoint (x: self.size.width/2, y: self.size.height/2)
    ball.zPosition = 2
    plate.addChild(ball)

    ball.physicsBody = SKPhysicsBody (circleOfRadius: 10)
    ball.physicsBody?.isDynamic = true
    ball.physicsBody?.affectedByGravity = true
    ball.physicsBody?.friction = 0
    ball.physicsBody?.restitution = 1
    ball.physicsBody?.categoryBitMask = 0
    ball.physicsBody?.contactTestBitMask = 1
    ball.physicsBody?.collisionBitMask = 1





}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    plate.zRotation -= .pi/36
}}

我的球和板块本身的边界之间甚至无法接触。

谢谢

在不同层次结构的

0 个答案: