ios - swift SpriteKit : Creating a realistic driving experience 2D

Question

我将如何创造逼真的驾驶体验？

我正在使用带有 SpriteKit 的 iOS Swift 3，当我点击 throttle 按钮时使用函数 applyForce 来加速，当我刹车时我给 physicsBody 添加了摩擦力，而且我似乎无法右转，不知道该怎么做

现在为了转弯，我正在使用左转和右转来分割屏幕，但我正在使用 applyForce，但这非常糟糕，因为它在汽车停止时转弯，而且以一种非常不现实的方式转弯。

当我施加力时它只会上升，所以如果我确实创建了一个转向机构并且我做了一个转弯，汽车仍然会上升。

另请注意:多点触控不起作用？

有什么帮助吗？谢谢

override func didMove(to view: SKView) {

    // Multi Touch
    self.view?.isMultipleTouchEnabled = true

    car.carNode.position = CGPoint(x: 0, y: 0)
    car.carNode.physicsBody = SKPhysicsBody(rectangleOf: car.carNode.size)
    car.carNode.physicsBody?.affectedByGravity = false
    car.carNode.physicsBody?.angularDamping = 0.1
    car.carNode.physicsBody?.linearDamping = 0.1
    car.carNode.physicsBody?.friction = 0.1
    car.carNode.physicsBody?.mass = 1

    self.addChild(car.carNode)

    // HUD Display
    gas.gasButton.position = CGPoint(x: 300, y: -500)
    self.addChild(gas.gasButton)

    brake.brakeButton.position = CGPoint(x: 150, y: -500)
    self.addChild(brake.brakeButton)

}

override func update(_ currentTime: TimeInterval) {

if touching {

    car.carNode.physicsBody?.applyForce(CGVector(dx: 0, dy: 180))
  }
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

for touch in touches {
    let location = touch.location(in: self)

    if location.x < self.frame.size.width / 2 {

        // Left side of the screen
        car.carNode.physicsBody?.applyForce(CGVector(dx: -100, dy: 0))

    } else {

        // Right side of the screen
        car.carNode.physicsBody?.applyForce(CGVector(dx: 100, dy: 0))
    }

    // Gas Button
    if (gas.gasButton.contains(location)) {

        touching = true
    }
        // Brake Button
    else if (brake.brakeButton.contains(location)) {

        car.carNode.physicsBody?.friction = 1
    }

  }
}

Answer 1

评论的整合

for touch in touches {
    let location = touch.location(in: self)

    let velY = car.carNode.physicsBody?.velocity.dy
    let factor:CGFloat = 100
    let maxFactor:CGFloat = 300
    //limit
    let dxCalc = factor * velY > maxFactor ? maxFactor : factor * velY

    if location.x < self.frame.size.width / 2 {

        // Left side of the screen
       car.carNode.physicsBody?.applyForce(CGVector(dx: -dxCalc, dy: 0))

     } else {

        // Right side of the screen
        car.carNode.physicsBody?.applyForce(CGVector(dx: dxCalc, dy: 0))
    }

    // Gas Button
    //etc

}