Create a line with two CGPoints SpriteKit Swift

Question

I am trying to make a simple app where you touch a point, and a sprite follows a line through that point to the edge of the screen, no matter where you touch. I want to draw lin

Answer 1

For the sake of simplicity, I pulled everything necessary to draw a line into an extension of SKShapeNode that allows you to create a line with a start & end point, as well as a strokeColor and strokeWidth (you could always preset these or make default values should you choose too)

extension SKShapeNode {
    convenience init(start: CGPoint,
                     end: CGPoint,
                     strokeColor: UIColor,
                     lineWidth: CGFloat) {
        self.init()

        let path = CGMutablePath()
        path.move(to: start)
        path.addLine(to: end)

        self.path = path
        self.strokeColor = strokeColor
        self.lineWidth = lineWidth
    }
}

The basic idea is that it will create a CGMutablePath with the provided points and assign it to the shape node for drawing a line.

To call it:

let horizontalLine = SKShapeNode(start: CGPoint(x: 0, y: 50),
                                 end: CGPoint(x: size.width, y: 50),
                                 strokeColor: .orange,
                                 lineWidth: 2.0)
addChild(horizontalLine)

And the output: