CODEWITHSUNDEEP
swiftsprite-kit
ExeRhythm
ExeRhythm

Reputation: 480

Rotate SKSpriteNode to Another SKSpriteNode

I am trying to rotate one sprite node to another. It rotates but not well. How can I fix it?

I have tried:

let blaster = self.childNode(withName: blaster)
let currentBlasterPosition = blaster!.position
let angle = atan2(currentBlasterPosition.y - cubes[0].position.y, currentBlasterPosition.x - cubes[0].position.x)
let rotateAction = SKAction.rotate(toAngle: angle + 90, duration: 0.0)

blaster!.run(SKAction.sequence([rotateAction]))

The SKSpriteNode is rotating for about -30 to 30 degrees from the point it should be (depending on its position).

game sprites screenshot

Upvotes: 1

Views: 78

Answers (1)

Vingdoloras
Vingdoloras

Reputation: 109

Instead of dealing with calculating the angles yourself, use SKConstraint for that task. Assuming your cubes is an Array of SKNodes:

let constraint = SKConstraint.orient(to: cubes[0], offset: SKRange(constantValue:0))
blaster!.constraints = [constraint]

You will have to do this just once, instead of every frame. The constraint is automatically applied every frame. To remove it, set the blaster's constraints back to nil:

blaster!.constraints = nil

Upvotes: 2

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