+
+ func getVertexShape(_ vertex: Vertex) -> Path {
+ switch vertex.shape {
+ case .circle:
+ return Path { path in
+ path.addEllipse(
+ in: CGRect(
+ origin: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y)), size: vertexSize
+ ))
+ }
+ case .square:
+ return Path { path in
+ path.addRect(
+ CGRect(
+ x: w(vertex.position.x), y: h(vertex.position.y), width: vertexSize.width,
+ height: vertexSize.height
+ ))
+ }
+ case .triangle:
+ return Path { path in
+ path.move(to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y) + vertexSize.height))
+ path.addLine(
+ to: CGPoint(
+ x: w(vertex.position.x) + vertexSize.width, y: h(vertex.position.y) + vertexSize.height)
+ )
+ path.addLine(
+ to: CGPoint(x: w(vertex.position.x) + vertexSize.width / 2.0, y: h(vertex.position.y)))
+ path.addLine(
+ to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y) + vertexSize.height))
+ path.closeSubpath()
+ }
+ case .x:
+ return Path { path in
+ path.move(to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y)))
+ path.addLine(
+ to: CGPoint(
+ x: w(vertex.position.x) + vertexSize.width, y: h(vertex.position.y) + vertexSize.height)
+ )
+ path.closeSubpath()
+ path.move(to: CGPoint(x: w(vertex.position.x) + vertexSize.width, y: h(vertex.position.y)))
+ path.addLine(
+ to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y) + vertexSize.height))
+ path.closeSubpath()
+ }.strokedPath(StrokeStyle(lineWidth: 5.0, lineCap: .butt))
+ }
+ }