Question

我正在尝试在SpriteKit中开发一个侧滚动游戏。我的问题如下：

我正在尝试为我的游戏添加一根绳子，但是当我开始游戏时它会中断。当我将这根绳子添加到非滚动游戏时，它的效果非常好。我认为这个问题来自现场的锚点或其他什么，但我无法弄明白。我已经有一个星期的“努力工作”了。我有一个名为“世界”的SKNode，并且所有对象都附加到它上面，我将“世界”移到左边，我将“相机”放在我的播放器上，所以玩家向右移动，所有其他对象都是留下了。

这是我的代码：

以下是“世界”的功能

override func didSimulatePhysics() {
   centerOnNode(ball)    
}

func centerOnNode(node: SKNode) {
   positionInScene = convertPoint(node.position, fromNode: node.parent!)
   world.position = CGPointMake(world.position.x - positionInScene.x + 100, world.position.y)
}

这是绳子的功能

let length = 5
let startPosition = CGPointMake(CGRectGetMaxX(self.frame), CGRectGetMaxY(self.frame))
var chains : [SKNode] = []

func addChain() {

    let chainHolder = SKSpriteNode(imageNamed: "chainHolder")
    chainHolder.position = startPosition

    chains.append(chainHolder)
    world.addChild(chainHolder)

    chainHolder.physicsBody = SKPhysicsBody(circleOfRadius: chainHolder.size.width / 2)
    chainHolder.physicsBody?.dynamic = false

    for i in 0..<length {

        let chainRing = SKSpriteNode(imageNamed: "chainRing")
        let offset = chainRing.size.height * CGFloat(i + 1)
        chainRing.position = CGPointMake(startPosition.x, startPosition.y - offset)
        chainRing.name = String(i)

        chains.append(chainRing)
        world.addChild(chainRing)

        chainRing.physicsBody = SKPhysicsBody(rectangleOfSize: chainRing.size)
    }

    for i in 1...length {

        let nodeA = chains[i - 1]
        let nodeB = chains[i]
        let joint = SKPhysicsJointPin.jointWithBodyA(nodeA.physicsBody, bodyB: nodeB.physicsBody,
            anchor: CGPointMake(CGRectGetMidX(nodeA.frame), CGRectGetMinY(nodeA.frame)))

        /*var pt = CGPointMake(world.position.x, world.position.y);
        pt = convertPoint(pt, fromNode: world);

        pt.x += scene.size.width * scene.anchorPoint.x;
        pt.y += scene.size.height * scene.anchorPoint.y;
        //pt.x += nodeA.position.x //- nodeA.frame.size.width / 2
        //pt.y += nodeA.position.y

        let joint = SKPhysicsJointPin.jointWithBodyA(nodeA.physicsBody, bodyB: nodeB.physicsBody,
            anchor: pt)*/

        self.physicsWorld.addJoint(joint)
    }
}

我应该如何制作这根绳子，使其不再破裂？任何帮助，将不胜感激。谢谢！

SKPhysicsJointPin在侧面滚动Swift SpriteKit游戏

0 个答案: