CODEWITHSUNDEEP
macossprite-kitskspritenodeswift5
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Reputation: 53

How to create a CGVector that "points" from one point (CGPoint) to another point

I want to use a CGVector for a SKAction.move, which moves one SKSpriteNode towards another SKSpriteNode.

I want to use this code:

let point: CGPoint = CGPoint(x: CGFloat(arc4random_uniform(UInt32(size.width))), y: CGFloat(arc4random_uniform(UInt32(size.height))))
let object: SKSpriteNode = SKSpriteNode(color: NSColor.red, size: CGSize(width: 10, height: 10))
object.position = CGPoint(x: 50, y: 50)
addChild(object)
object.run(SKAction.move(by: CGVector(), duration: 2.5)) // <- Vector from `object.position` to `point`

Upvotes: 2

Views: 478

Answers (1)

Daniel Hall
Daniel Hall

Reputation: 854

You need to use vector math so looking at your code you want to use something like this:

let P1 = point
let P2 = object.position
//Find offset
let offset = P1 - P2
//Set X and Y distance to move
let distX = CGFloat(offset.x)
let distY = CGFloat(offset.y)
//set vector
let vec = CGVector(dx: distX, dy: distY)
//Set action
object.run(SKAction.move(by: vec, duration: 2.4)

Let me know how you get on

Upvotes: 2

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