added conversion initializers

Author: juliand665

Sources/CGeometry/CGPoint.swift

@@ -3,6 +3,16 @@ import CoreGraphics
 public extension CGPoint {
 	static var zero: Self { Self(x: 0, y: 0) }
 
+	init(_ vector: CGVector) {
+		x = vector.dx
+		y = vector.dy
+	}
+	
+	init(_ size: CGSize) {
+		x = size.width
+		y = size.height
+	}
+	
 	// MARK: Point × Vector
 
 	static func + (point: Self, offset: CGVector) -> Self {

Sources/CGeometry/CGSize.swift

@@ -5,6 +5,16 @@ public extension CGSize {
 
 	static var one: CGSize { .init(width: 1, height: 1) }
 
+	init(_ point: CGPoint) {
+		width = point.x
+		height = point.y
+	}
+	
+	init(_ vector: CGVector) {
+		width = vector.dx
+		height = vector.dy
+	}
+	
 	// MARK: Size × Float
 
 	static func * (size: Self, scale: CGFloat) -> Self {

Sources/CGeometry/CGVector.swift

@@ -11,6 +11,16 @@ public extension CGVector {
 		self.init(dx: cos(angle) * length, dy: sin(angle) * length)
 	}
 
+	init(_ point: CGPoint) {
+		dx = point.x
+		dy = point.y
+	}
+	
+	init(_ size: CGSize) {
+		dx = size.width
+		dy = size.height
+	}
+	
 	func clamped(to length: CGFloat) -> Self {
 		let len = self.length