Make bullets fire outwards in a circle - ios

Question

I have a player that when the user taps I want to be able to spawn 8 bullets around the player (with a 45˚ separation between them) and proceed to move them outwards to the edge of the screen.
The circle from where the bullets originate from is correct, but the bullets in the bottom left of the screen seem to be moving faster than the ones in the top right. Also the bullets are facing sideways, not pointing outwards.
func fireSpecialWeapon() {
stride(from: 0, to: 2 * CGFloat.pi, by: 2 * CGFloat.pi / 10 ).forEach { angle in
let bullet = SKSpriteNode(imageNamed: "bulletCircle")
bullet.setScale(3)
bullet.zRotation = angle
bullet.position = player.position
bullet.zPosition = 2
//move outwards to the edge of the screen
let distance: CGFloat = 2000
let endPoint = CGPoint(x: distance * cos(angle), y: distance * sin(angle))
let move = SKAction.move(to: endPoint, duration: 2)
self.addChild(bullet)
bullet.run(move)
}
}

Answer 1

You should use trig to figure out the end point based on the angle. distance * sin is the y component and distance * cos is the x component. The code looks somethign like this:
stride(from: 0, to: 2 * CGFloat.pi, by: 2 * CGFloat.pi / 8).forEach { angle in
let bullet = SKSpriteNode(imageNamed: "bulletCircle")
bullet.setScale(3)
bullet.zRotation = angle
bullet.position = player.position
bullet.zPosition = 2
//move outwards to the edge of the screen
let distance: CGFloat = 500
let endPoint = CGPoint(x: distance * cos(angle), y: distance * sin(angle))
let move = SKAction.move(to: endPoint, duration: 2)
self.addChild(bullet)
bullet.run(move)
}

Answer 2

The first thing I noticed is that your rotation calculation is not correct.
First the rotation of each bullet should be pi / 4 from its neighbours.
So you should not use pi / I but (pi / 4) * I.
That should fix up the rotation but I’m not sure if that’s everything that’s not working.