swift - Swift - sprite kit - 让 SKPhysicsJointPin 运动更少

Question

我正在尝试创建一条具有左右移动的多个身体部位的蛇。我用的是别针，但是当蛇停下来时，身体一直在移动并且不会停止。我弄乱了最大和最小角度以及扭矩，但似乎没有任何效果。我应该使用不同类型的关节吗？

Answer 1

抱歉，我无法登录我的其他帐户，但这是代码。基本上第二部分只是摇摆不定。我希望添加 7-8 个部分，但它们只是继续摇摆不定，尤其是在移动“头部”之后。当我移动蛇时，我想要一个流畅的“俯冲”动作。

    self.physicsWorld.gravity = CGVectorMake(0, -100)
    self.physicsWorld.contactDelegate = self

    head.size = CGSize(width: 25,height: 25)
    head.physicsBody = SKPhysicsBody(texture: head.texture, size: head.size)
    head.position = CGPointMake(100,400)
    head.anchorPoint = CGPoint(x: 0.5, y: 1)
    head.physicsBody!.dynamic = false
    head.zPosition = 3
    self.addChild(head)

    var p1 = SKSpriteNode(imageNamed: "snakeBodyPart.png")
    p1.size = CGSize(width: 25,height: 25)
    p1.physicsBody = SKPhysicsBody(texture: p1.texture, size: p1.size)
    p1.position = CGPointMake(100,380)
    p1.anchorPoint = CGPoint(x: 0.5, y: 1)
    p1.physicsBody!.dynamic = true
    addChild(p1)

    var joint = SKPhysicsJointPin.jointWithBodyA(head.physicsBody, bodyB: p1.physicsBody, anchor: CGPoint(x: CGRectGetMidX(head.frame), y: CGRectGetMinY(head.frame) + 10))
    joint.upperAngleLimit = 0.1
    joint.rotationSpeed = 0.1
    self.physicsWorld.addJoint(joint)