Taken from the handPose (https://developer.apple.com/documentation/vision/detecting_hand_poses_with_vision) example, camerView.swift file:
func showPoints(_ points: [CGPoint], color: UIColor) {
pointsPath.removeAllPoints()
for point in points {
pointsPath.move(to: point)
pointsPath.addArc(withCenter: point, radius: 5, startAngle: 0, endAngle: 2 * .pi, clockwise: true)
}
overlayLayer.fillColor = color.cgColor
CATransaction.begin()
CATransaction.setDisableActions(true)
overlayLayer.path = pointsPath.cgPath
CATransaction.commit()
}
Instead of drawing two points, I want to modify the code so it draws four points, and using a different color for each finger points.
func showPoints2(_ points: [CGPoint], color: [UIColor]) {
pointsPath.removeAllPoints()
pointsPath.move(to: points[0])
pointsPath.addArc(withCenter: points[0], radius: 5, startAngle: 0, endAngle: 2 * .pi, clockwise: true)
overlayLayer.fillColor = UIColor.red.cgColor
CATransaction.begin()
CATransaction.setDisableActions(true)
overlayLayer.path = pointsPath.cgPath
pointsPath.move(to: points[1])
pointsPath.addArc(withCenter: points[1], radius: 5, startAngle: 0, endAngle: 2 * .pi, clockwise: true)
overlayLayer.fillColor = UIColor.green.cgColor
CATransaction.begin()
CATransaction.setDisableActions(true)
overlayLayer.path = pointsPath.cgPath
pointsPath.move(to: points[2])
pointsPath.addArc(withCenter: points[2], radius: 5, startAngle: 0, endAngle: 2 * .pi, clockwise: true)
overlayLayer.fillColor = UIColor.blue.cgColor
CATransaction.begin()
CATransaction.setDisableActions(true)
overlayLayer.path = pointsPath.cgPath
pointsPath.move(to: points[3])
pointsPath.addArc(withCenter: points[3], radius: 5, startAngle: 0, endAngle: 2 * .pi, clockwise: true)
overlayLayer.fillColor = UIColor.black.cgColor
CATransaction.begin()
CATransaction.setDisableActions(true)
overlayLayer.path = pointsPath.cgPath
CATransaction.commit()
}
My modified code does render the 4 points, but the color is always the last color I have selected in the function, in this case black color. How to to make it renders 4 different colors?
