I have a scene with two nodes one is a shape node and the other one is a sprite node. I added to the scene and define its respective physics body properties. Everything looks good until I added a new Fixed joint between the two nodes, as you can see the physic debug show a diagonal line through the screen, I don't know what this means, the anchor point seems to be misaligned.
Note: The anchor node is an image with 1x1 size
This is the code
class GameScene: SKScene, SKPhysicsContactDelegate {
private var anchor = SKSpriteNode(imageNamed: "anchor")
private var curve: SKShapeNode!
override func didMove(to view: SKView) {
self.physicsWorld.contactDelegate = self
self.addAnchor()
self.addCurve()
// This is the code is causing the diagonal line
let jointOneFixed = SKPhysicsJointFixed.joint(withBodyA: anchor.physicsBody!, bodyB: curve.physicsBody!, anchor: anchor.position)
self.physicsWorld.add(jointOneFixed)
}
func addAnchor(){
anchor.position = CGPoint(x: self.size.width / 2, y: self.size.height + 1)
anchor.anchorPoint = CGPoint(x: 0.5, y: 0.5)
anchor.setScale(1)
anchor.zPosition = 2
anchor.name = "anchor"
anchor.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: anchor.size.width, height: anchor.size.height))
anchor.physicsBody?.isDynamic = false
anchor.physicsBody?.affectedByGravity = false
anchor.physicsBody?.allowsRotation = true
self.addChild(anchor)
}
func addCurve() {
let startPoint = CGPoint(x: anchor.position.x, y: anchor.position.y)
let endPoint = CGPoint(x: self.size.width / 2, y: self.size.height - 400)
// Create line with SKShapeNode
curve = SKShapeNode()
curve.zPosition = 9
let path = UIBezierPath()
path.move(to: startPoint)
path.addCurve(to: endPoint, controlPoint1: CGPoint(x: endPoint.x - 50, y: self.size.height - 140), controlPoint2: CGPoint(x: endPoint.x + 70, y: self.size.height - 260))
curve.path = path.cgPath
curve.strokeColor = UIColor.red
curve.lineWidth = 9
curve.name = "curve"
curve.physicsBody = SKPhysicsBody(edgeLoopFrom: curve.path!)
self.addChild(curve)
}
}
This is the screenshot (I'm not able to include images in my posts yet, so this is the link) Screenshot
