CGeometry Simple operators (plus convenient initializers and constants) for CoreGraphics geometric constructs: CGPoint, CGVector, and CGSize. Example let a = CGPoint(x: 4, y: 7) print(CGVector(a).length) // 8.06 print(CGVector(a).angle) // 1.05… (~60.3°) let b = CGPoint(x: 10, y: 3) print(b - a) // CGVector(dx: 6, dy: -4) print(a + 0.5 * (b - a)) // CGPoint(x: 7, y: 5) let offset = CGVector(dx: 10, dy: -5) print(a + offset) // CGPoint(x: 14, y: 2) print(a + offset / 2) // CGPoint(x: 9, y: 4.5) let angled = CGVector(angle: 1/3 * .pi, length: 2) print(angled) // CGVector(dx: 1, dy: 1.73…)