 		let verticalScale = self.verticalScale
 		let horizontalTranslation = self.horizontalTranslation
 		let verticalTranslation = self.verticalTranslation
-		let rotation = self.rotation
+		let rotationAngle = self.rotationAngle
 
 		var description = ""
 

			description += String(describing: verticalScale)
		}

		if rotation != 0 {
			if !description.isEmpty { description += ", " }
			description += "rotation: "
			description += String(describing: rotation / .pi)
			description += " * .pi"
		}


	}


	@available(*, unavailable, renamed: "rotationAngle")
	public var rotation: CGFloat {
		return atan2(b, a)
	}


	public var rotationAngle: CGFloat {
		return atan2(b, a)
	}

