问为什么路径朝向相反的方向？

EN

struct CircularSector: Shape {
    let centralAngle: Angle
    
    func path(in rect: CGRect) -> Path {
        let radius = min(rect.width, rect.height) / 2
        let center = CGPoint(x: rect.midX, y: rect.midY)
        var path = Path()
        path.addArc(center: center, radius: radius, startAngle: .degrees(0), endAngle: centralAngle, clockwise: true)
        path.addLine(to: center)
        path.closeSubpath()
        return path
    }
}

struct CircularSector_Previews: PreviewProvider {
    static var previews: some View {
        CircularSector(centralAngle: .degrees(45)).fill(Color.black)
        }
    }
}