使用Apple FaceDetection SDK

Question

當我嘗試使用apple faceDetection SDK時，它成功檢測到右眼位置，從而形成了兩只眼睛之間的貝塞爾曲線。

我需要知道睜開眼睛時要在眼睛上方成像，並隨睜眼角度減小圖像的寬度和高度。

我使用此功能但沒有給我正確的結果

 func draw(points: [(x: CGFloat, y: CGFloat)]) {
        let newLayer = CAShapeLayer()
         newLayer.lineWidth = 2.0
         let path = UIBezierPath()

        path.move(to: CGPoint(x: points[0].x, y: points[0].y))
        for i in 0..<points.count - 1 {
            var point: CGPoint = .zero
            point = CGPoint(x: points[i].x, y: points[i].y)
            path.addLine(to: point)
            path.move(to: point)
            path.addLine(to: CGPoint(x: points[0].x, y: points[0].y))

        }

         newLayer.path = path.cgPath
         newLayer.contents = UIImage(named:"eye2.png")?.cgImage;
         newLayer.contentsGravity = kCAGravityResizeAspectFill
         newLayer.isGeometryFlipped = false

         print("Hello Swift",shapeLayer.bounds)

        shapeLayer.addSublayer(newLayer)

    }