.swift

 private func hitTestWithPlane(touch :CGPoint) {
        
        let hitTestResults = sceneView.hitTest(touch, types: .existingPlane)
        if !hitTestResults.isEmpty {
            
            if let hitTestResult = hitTestResults.first {
                
                print("plane hit test")
                print(hitTestResult.worldTransform)
                addAnchorWithTransform(transform: hitTestResult.worldTransform)
            }
        }
    }