The document outlines a function in ARKit for converting screen positions to real-world 3D vectors using SCNVector3. It describes the implementation of a hit test to find existing planes and includes a link to a GitHub repository for additional resources. Additionally, the document touches on node constraints in SceneKit, emphasizing the use of look-at constraints.

2. 🎉

3. ARKit
NG

7. !!

8. ///
///
/// - Parameter screenPosition: CGPoint
/// - Returns: SCNVector3
func realWorldVector(screenPosition: CGPoint) -> SCNVector3? {
let results = self.hitTest(screenPosition, types: [.existingPlane])
//
guard let result = results.first else {
return nil
}
// SCNVector3
return SCNVector3.positionFromTransform(result.worldTransform)
}

9. ARKit
• AR
3D → ARSCNView (AR + SceneKit)
2D → ARSKView (AR + SpriteKit)

11. • https://github.com/levantAJ/Measure

17. // Node
let constraint = SCNLookAtConstraint(target: SCNNode)
constraint.isGimbalLockEnabled = true
textNode.constraints = [constraint]
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