How can I make SKAction.move() to be random and repeatForever?
For example:
let boxPosition = Double.random(in: 100…600)
let boxMove = SKAction.move(to: CGPoint(x: boxPosition, y: 100), duration: 10)
let boxRepeat = SKAction.repeatForever(boxMove)
box.run(boxRepeat)
I know that in above example will not update the value…
I have solution that works but doesn't feel right. The sequence won't work...
import SpriteKit
class GameScene: SKScene {
let box = SKSpriteNode()
override func didMove(to view: SKView) {
box.texture = SKTexture(imageNamed: "box")
box.size = CGSize(width: 50, height: 50)
box.position = CGPoint(x: 200, y: 200)
addChild(box)
let boxRandom = SKAction.run({
let boxPosition = Double.random(in: 300...500)
let boxMove = SKAction.move(to: CGPoint(x: 200, y: boxPosition), duration: 2)
self.box.run(boxMove)
})
let boxMove = SKAction.move(to: CGPoint(x: 200, y: 100), duration: 2)
let boxGroup = SKAction.sequence([boxMove, boxRandom])
let boxRepeat = SKAction.repeatForever(boxGroup)
box.run(boxRepeat)
}
}
Any suggestion? Thanks for all the answers in advance.
The SKAction.run takes place instantaneously, so it won't wait for the completion of the SKAction.move inside it.
A simple fix for your code would be to add an SKAction.wait for the same duration as the SKAction.move inside the block to the sequence:
let wait = SKAction.wait(forDuration: 2)
let boxGroup = SKAction.sequence([boxMove, boxRandom, wait])
If you need to use a custom duration for each move action, you could create a method that will run the random move and recursively call the same method when the move completes. Something like this:
override func didMove(to view: SKView) {
recursiveRandomMove()
}
func recursiveRandomMove() {
let random = CGFloat.random(in: 100...400)
let duration = Double.random(0...10) // your custom duration here
box.run(SKAction.sequence([
SKAction.moveTo(x: random, duration: duration),
SKAction.run {
self.recursiveRandomMove()
}
]))
}
Also consider looking at Drive Game Logic for more control over your outcomes.