SwiftUI freeform drawing

SwiftUIFreeformDrawing.swift

struct DrawingPath {
    private var points = [CGPoint]()
    private var breaks = [Int]()
    
    mutating func addPoint(_ point: CGPoint) {
        points.append(point)
    }
    
    mutating func addBreak() {
        breaks.append(points.count)
    }
    
    var path: Path {
        var path = Path()
        guard let firstPoint = points.first else { return path }
        path.move(to: firstPoint)
        for i in 1..<points.count {
            if breaks.contains(i) {
                path.move(to: points[i])
            } else {
                path.addLine(to: points[i])
            }

        }
        return path
    }
}

struct DrawShape: Shape {
    let drawingPath: DrawingPath
    
    func path(in rect: CGRect) -> Path {
        drawingPath.path
    }
}

struct DrawViewTest: View {
  @State private var drawing: DrawingPath

  var body: some View {
    ZStack {
      Color.white // drawing background
      DrawShape(drawingPath: drawing)
        .stroke(lineWidth: 5) // define stroke width
        .foregroundColor(.blue) // define stroke color
    }.gesture(DragGesture()
     .onChanged( { value in
       drawing.addPoint(value.location)
     }).onEnded( { value in
       drawing.addBreak()
     }))
  }
}