Scale & Translate Points

ScaleAndTranslate.Swift

public static func scale(points: [StrokePoint], toSize size: Double) -> [StrokePoint] {
	let boundingBox = StrokePoint.boundingBox(points)
	var newPoints: [StrokePoint] = []
	for point in points {
		let qx = point.x * (size / boundingBox.width)
		let qy = point.y * (size / boundingBox.height)
		newPoints.append(StrokePoint(x: qx, y: qy))
	}
	return newPoints
}

public static func translate(points: [StrokePoint], to pt: StrokePoint) -> [StrokePoint] {
	let centroidPoint = StrokePoint.centroid(points)
	var newPoints: [StrokePoint] = []
	for point in points {
		let qx = point.x + pt.x - centroidPoint.x
		let qy = point.y + pt.y - centroidPoint.y
		newPoints.append(StrokePoint(x: qx, y: qy))
	}
	return newPoints
}