如何使雪碧坐在移动的雪碧上

Question

如何使一个精灵坐在移动的雪碧上，并与它一起旅行。我让红色盒子冲动地跳起来，当它落在正在移动的黑色方块上时，如果它掉下来，红色盒子就停留在移动的物体上，就像没有摩擦力一样。在重力条件下，摩擦力1.0甚至都试着增加质量，但都没有效果。请给我详细的说明如何使它工作？谢谢覆盖func didMoveToView(视图: SKView) { /*在这里设置场景*/

    self.physicsWorld.gravity = CGVectorMake(0.0, -9.8)
    SquareOne.fillColor = UIColor.orangeColor()
    SquareOne.position = CGPoint(x: self.frame.midX, y: self.frame.midY)
    SquareOne.physicsBody = SKPhysicsBody(rectangleOfSize: SquareOne.frame.size)
    SquareOne.physicsBody?.friction = 1.0
    SquareOne.physicsBody?.restitution = 0.0

    addChild(SquareOne)


    SquareTwo.fillColor = UIColor.greenColor()
    SquareTwo.position = CGPoint(x: self.frame.midX, y: self.frame.midY - 100)
    SquareTwo.physicsBody = SKPhysicsBody(rectangleOfSize: SquareTwo.frame.size)
    SquareTwo.physicsBody?.dynamic = false
    SquareTwo.physicsBody?.affectedByGravity = false
    SquareTwo.physicsBody?.friction = 1.0
    SquareTwo.physicsBody?.restitution = 0.0
    addChild(SquareTwo)

}

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    /* Called when a touch begins */

    for touch in (touches as! Set<UITouch>) {
        let location = touch.locationInNode(self)
        SquareTwo.runAction(SKAction.moveByX(-100, y: 0.0, duration: 3.0))
    }
}

​

​

Answer 1

在物理模拟中，你应该应用速度和力使模拟正确地工作。使用SKAction无法正确地模拟物理。

首先，需要使SquareTwo成为动态的，这样它才能受到力量的影响。使SquareTwo的质量变大，使身体不受其他SquareOne与之碰撞的影响。

SquareTwo.physicsBody?.dynamic = true
SquareTwo.physicsBody?.affectedByGravity = false
// Make the mass big so that the body is not affected by the other body colliding with it.
SquareTwo.physicsBody?.mass = 1000000

然后在touchesBegan内部你可以设定一个速度到SquareTwo

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    /* Called when a touch begins */

    for touch in (touches as! Set<UITouch>) {
        let location = touch.locationInNode(self)
        SquareTwo.physicsBody?.velocity = CGVectorMake(-10, 0)
     }
}

Answer 2

您可以删除红色块，然后将其作为子节点添加到移动块中：

var redBlockPosition = childNodeWithName("redBlockName")?.position //find where red block is in self
var movingBlockPosition = childNodeWithName("movingBlockName")?.position //find where moveing block is in self
var redBlockPositionFromMovingBlock = CGPointMake(redBlockPosition.x + movingBlockPosition.x, redBlockPosition.y - movingBlockPosition.y) //find where red block is from moving block's origin
childNodeWithName("redBlockName")?.removeFromParent() //remove red block
redBlock.position = redBlockPositionFromMovingBlock //change redBlock's position
childNodeWithName("movingBlockName")?.addChild(redBlock) //add red block as a child node of moving block

希望这能帮上忙，祝你好运。

Answer 3

试试redBox.physicsBody.allowsRotation = NO，

一个布尔值，表示物理物体是否受施加于它的角力和脉冲的影响。

调整redBox.physicsBody.restitution在0.0到1.0之间，

物理身体的弹性。