我正在制作iOS应用程序并遇到一些物理问题.正如您可以通过下面的.GIF所知,当我旋转六边形并且球以一定角度撞击矩形时,它会失去一些速度并且不会反弹得那么高.这是因为共享
here的原因(主要是因为我约束球的水平位置,它只是在击中角度时使用垂直速度,因此失去速度).
我无法为我的生活找到解决方案来解决这个问题.有没有人有任何想法？
Ball节点代码：
func createBallNode(ballColor: String) -> SKSpriteNode {
let ball = SKSpriteNode(imageNamed: ballColor)
ball.position = CGPoint(x: CGRectGetMidX(frame),y: CGRectGetMidY(frame)+30)
ball.zPosition = 1
ball.physicsBody = SKPhysicsBody(circleOfRadius: ball.size.width/2)
ball.physicsBody?.affectedByGravity = true
ball.physicsBody?.restitution = 1
ball.physicsBody?.linearDamping = 0
ball.physicsBody?.friction = 0
ball.physicsBody?.categoryBitMask = ColliderType.Ball.rawValue
ball.physicsBody?.contactTestBitMask = ColliderType.Rect.rawValue
ball.physicsBody?.collisionBitMask = ColliderType.Rect.rawValue
let centerX = ball.position.x
let range = SKRange(lowerLimit: centerX,upperLimit: centerX)
let constraint = SKConstraint.positionX(range)
ball.constraints = [constraint]
return ball
}
解决方法
是的,问题可能是由于球没有完全“对齐”时击中六边形.在这种情况下,球失去垂直速度而有利于水平轴.
既然你想要一个“离散逻辑”我相信这个场景你应该避免物理学(至少对于弹跳部分).重复垂直移动球的SKAction会容易得多.
例
我准备了一个简单的例子
class GameScene: SKScene {
override func didMove(to view: SKView) {
super.didMove(to: view)
let ball = createBallNode()
self.addChild(ball)
}
func createBallNode() -> SKSpriteNode {
let ball = SKSpriteNode(imageNamed: "ball")
ball.position = CGPoint(x: frame.midX,y: frame.minY + ball.frame.height / 2)
let goUp = SKAction.move(by: CGVector(dx: 0,dy: 600),duration: 1)
goUp.timingMode = .eaSEOut
let goDown = SKAction.move(by: CGVector(dx: 0,dy: -600),duration: 1)
goDown.timingMode = .easeIn
let goUpAndDown = SKAction.sequence([goUp,goDown])
let forever = SKAction.repeatForever(goUpAndDown)
ball.run(forever)
return ball
}
}
更新
如果您需要在每次球接触Hexagon底座时执行检查,您可以使用此代码
class GameScene: SKScene {
override func didMove(to view: SKView) {
super.didMove(to: view)
let ball = createBallNode()
self.addChild(ball)
}
func createBallNode() -> SKSpriteNode {
let ball = SKSpriteNode(imageNamed: "ball")
ball.position = CGPoint(x: frame.midX,duration: 1)
goDown.timingMode = .easeIn
let check = SKAction.customAction(withDuration: 0) { (node,elapsedTime) in
self.ballTouchesBase()
}
let goUpAndDown = SKAction.sequence([goUp,goDown,check])
let forever = SKAction.repeatForever(goUpAndDown)
ball.run(forever)
return ball
}
private func ballTouchesBase() {
print("The ball touched the base")
}
}
正如您现在所看到的,每次球是一个较低的y坐标时,都会调用ballTouchesBase方法.这是添加六边形颜色检查的正确位置.