Question

我目前有两个SKSpriteNodes，我已经添加了SKPhysicsBodies。当他们没有连接SKJoint时，他们会按预期发生碰撞。一旦我添加了SKPhysicsJoint，它们就会直接通过彼此。我正确地添加任何关节功能，但SKPhysicsJointLimit仅限制节点彼此分开的程度，而不是它们接近的程度。我该如何解决这个问题？

以下是我用于联合的代码：

let joint = SKPhysicsJointLimit.joint(withBodyA: object1.physicsBody!, bodyB: object2.physicsBody!, anchorA: CGPoint(x: object1.position.x + iconController.position.x, y: object1.position.y + iconController.position.y), anchorB: CGPoint(x: object2.position.x + iconController.position.x, y: object2.position.y + iconController.position.y))
    joint.maxLength = screen.height * 0.4

physicsWorld.add(joint)

物理两个节点的体现：

self.physicsBody = SKPhysicsBody(circleOfRadius: self.size.width / 2)
self.physicsBody?.allowsRotation = false
self.physicsBody?.friction = 0
self.physicsBody?.mass = 0.1

我已经使用不同的值对SKPhysicsBody的上述修改进行了测试，并且它也执行相同的操作。

Answer 1

SKPhysicsJoint对象连接两个物理实体，以便它们由物理世界一起模拟。您也可以使用SKPhysicJointPin：

销钉接头允许两个机构围绕机身独立旋转锚点好像固定在一起。

如果您的物体在物理引擎添加SKPhysicsJoint之前运作良好，那么他们按照您的意愿解雇了didBeginContact并且您已经设置了，我认为您的问题只是一个错误的锚点。尝试添加：

let skView = self.view as! SKView skView.showsPhysics = true

到您的场景初始化代码：您将看到物理机构的轮廓，也许您会立即看到问题。

为了帮助您，我将尝试举例说明相互碰撞的元素：

enum CollisionTypes: UInt32 {
    case Boundaries = 1
    case Element = 2
}

class GameScene: SKScene,SKPhysicsContactDelegate {
    private var elements = [SKNode]()
    override func didMoveToView(view: SKView) {
        physicsWorld.gravity = CGVector(dx: 0, dy: 0)
        self.physicsWorld.contactDelegate = self
        let boundariesFrame = CGRectMake(20, 20, 200, 400)
        let boundaries = SKShapeNode.init(rect: boundariesFrame)
        boundaries.position = CGPointMake(350,150)
        let boundariesBody = SKPhysicsBody.init(edgeLoopFromRect: boundariesFrame)
        boundariesBody.dynamic = false
        boundariesBody.categoryBitMask = CollisionTypes.Boundaries.rawValue
        boundariesBody.contactTestBitMask = CollisionTypes.Element.rawValue
        boundaries.physicsBody = boundariesBody
        addChild(boundaries)
        for index in 0..<5 {
            let element = SKShapeNode(circleOfRadius: 10)
            let body = SKPhysicsBody(circleOfRadius: 10)
            body.linearDamping = 0
            // body.mass = 0
            body.dynamic = true
            body.categoryBitMask = CollisionTypes.Element.rawValue
            body.contactTestBitMask = CollisionTypes.Boundaries.rawValue | CollisionTypes.Element.rawValue
            body.collisionBitMask = CollisionTypes.Boundaries.rawValue | CollisionTypes.Element.rawValue
            element.physicsBody = body
            element.position = CGPoint(x: size.width / 2, y: size.height / 2 - 30 * CGFloat(index))
            elements.append(element)
            addChild(element)
        }
    }
}

希望它可以帮助您找到问题。

添加SKPhysicsJointLimit后，SKPhysicsBodies不会发生碰撞

1 个答案: