我的目标是,一旦该SKShapeNode与另一个Node碰撞,就立即更改它的fillColor。我确实知道如何在碰撞点编辑物理物体,但是我无法弄清楚如何更改节点的fill-或strokeColor之类的属性。
SKShapeNode:
func addBrick() -> SKShapeNode {
let brick = SKShapeNode(rect: CGRect(x: -100, y: -20, width: 200, height: 40), cornerRadius: 20)
brick.fillColor = .blue
brick.strokeColor = .blue
brick.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 200, height: 40))
brick.position = CGPoint(x: 0, y: -50)
brick.zPosition = 2
brick.physicsBody?.categoryBitMask = BrickCategory
brick.physicsBody?.collisionBitMask = PlayerCategory
brick.physicsBody?.contactTestBitMask = PlayerCategory
return brick
}
然后我测试播放器与积木之间的接触:
func didBegin(_ contact: SKPhysicsContact) {
let contactMask = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask
switch contactMask {
case PlayerCategory | BrickCategory:
print("")
default:
print("Unknown collision")
}
}
我确实知道我可以使用来更改物理物体本身
contact.bodyB.node?.//make changes here
,但是我不知道如何将例如bodyB的fillColor更改为红色。
感谢您的帮助!
如果您有一个应该知道是SKNode
的node
SKShapeNode
,则可以将其转换为:
if let shapeNode = node as? SKShapeNode {
shapeNode.fillColor = .red
}