CODEWITHSUNDEEP
iosswiftsprite-kit
Ma new L
Ma new L

Reputation: 29

how to change the speed of falling nodes in SWIFT

I would like to know how to change the speed of falling nodes in sprite kit using swift, I have tried by changing the gravity, but when it goes very fast it starts to crash. I have done this, it works, but as I said it crashes:

var velocity:CGFloat = 0
override func update(currentTime: CFTimeInterval) {
velocity = CGFloat(score*3)
self.physicsWorld.gravity = CGVectorMake(0, -velocity)
}

Thank you!

Upvotes: 0

Views: 1487

Answers (1)

ZeMoon
ZeMoon

Reputation: 20274

Instead of changing the scene's gravity, you can apply a force on the nodes.

Disable the gravity

self.physicsWorld.gravity = CGVectorMake(0,0)

Set the name property of each falling node with it's declaration

node.name = @"fallingNode"

Then, in the update Function

self.enumerateChildNodesWithName("fallingNode", usingBlock: {

    (node: SKNode!, stop: UnsafeMutablePointer <ObjCBool>) -> Void in
        // do something with node or stop
        node.physicsBody?.applyForce(velocity)
        return
    })

Upvotes: 1

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