HalfCircle

gistfile1.txt

struct TopHalfCircle: Shape {
    func path(in rect: CGRect) -> Path {
        var path = Path()
        
        path.addArc(
            center: .zero,
            radius: 1,
            startAngle: .radians(.pi),
            endAngle: .zero,
            clockwise: false
        )
        
        let transform = CGAffineTransform.identity
            .translatedBy(x: rect.origin.x + 0.5 * rect.size.width, y: rect.size.height)
            .scaledBy(x: rect.width / 2, y: rect.height)

        return path.applying(transform)
    }
}
struct BottomHalfCircle: Shape {
    func path(in rect: CGRect) -> Path {
        var path = Path()
        
        path.addArc(
            center: .zero,
            radius: 1,
            startAngle: .zero,
            endAngle: .radians(.pi),
            clockwise: false
        )

        let transform = CGAffineTransform.identity
            .translatedBy(x: rect.origin.x + 0.5 * rect.size.width, y: 0)
            .scaledBy(x: rect.width / 2, y: rect.height)

        return path.applying(transform)
    }
}