Swift SpriteKit:创造逼真的驾驶体验2D

Question

如何通过创造逼真的驾驶体验？

我正在使用带有SpriteKit的iOS Swift 3使用函数applyForce来加速当我点击加油按钮时和制动时我给物理部件添加了摩擦力,我也似乎无法向右转,不知道如何做到这一点.

现在转向我正在使用左右转动分割屏幕,但我正在使用applyForce,但它非常糟糕,因为它在汽车停止时以非常不切实际的方式转动.

当我施加力时它只会上升所以如果我确实创造了一个转动机构并且我做了一次,那么这辆车仍然会上升.

另外注意:多点触控不起作用？

有帮助吗？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

} }