Update README.md

Author: psharanda

README.md

@@ -1,20 +1,35 @@
 <p align="center">
 <img src="Readme/logo.png" width="50%" alt="Easing Logo" />
 </p>
-Easing library is a comprehensive set of easing functions, useful for interactive animations and other time-based calculations where smooth transitions are necessary.
+The Easing library is a comprehensive set of easing functions, useful for interactive transitions and other time-based calculations.
 
 ## Features
 
-- Unified set of easing functions
+- Unified [set](#reference) of easing functions ([])
 - Easy-to-use 'swifty' API to invoke calculations
-- Interpolation shorthands for the most popular primitive types like CGPoint, CGSize, CGTransform, UIColor and UIBezierPath
-- Bridge to CAMediaTimingFunction
-- Arbitrary cubic bezier based easings
+- Interpolation shorthands for commonly used types like `CGPoint`, `CGSize`, `CGTransform`, `UIColor` and `UIBezierPath`
+- Arbitrary cubic bezier based easings (see `.cubicBezier(...)`)
+- Emulate default easings from iOS (see `.caEaseIn`, `.caEaseOut`, `.caEaseInEaseOut`)
 - Interactive demo app
 - Supports iOS 12.0+ / Mac OS X 10.13+ / tvOS 12.0+ / watchOS 4.0+ / visionOS 1.0+
 
 ## Usage
 
+### Basic
+
+````swift
+
+let startValue = 20.0
+let endValue = 60.0
+let progress = 0.5  // Assume a progress variable that ranges from 0 to 1
+
+let valueAtProgress = Easing.cubicEaseIn.calculate(
+    d1: startValue,
+    d2: endValue,
+    g: progress
+)
+````
+
 ### Real world example
 
 Imagine an interaction with a `UIScrollView` where its header is fully visible when the content offset is zero and fades out completely as the content offset exceeds 100 points. You can express this behavior with the following code in your `scrollViewDidScroll` method:
@@ -40,8 +55,11 @@ headerView.alpha = Easing.quadraticEaseInOut.calculate(
 ````swift
 let startTransform = CGAffineTransform.identity
 let endTransform = CGAffineTransform(scaleX: 2, y: 2)
+let progress = 0.5  // Assume a progress variable that ranges from 0 to 1
 
-transformDemoView.transform = startTransform.interpolate(to: endTransform, progress: progress, easing: .linear)
+view.transform = startTransform.interpolate(to: endTransform,
+                                      progress: progress,
+                                        easing: .linear)
 
 ````
 
@@ -111,7 +129,7 @@ https://github.com/psharanda/Easing.git
 
 ## References
 
-The main set of easing functions is a Swift port of https://github.com/warrenm/AHEasing which is a port of https://github.com/ai/easings.net (https://easings.net)
+The main set of easing functions is a Swift port of https://github.com/warrenm/AHEasing and https://github.com/ai/easings.net
 
 `CubicBezierInterpolator` is a Swift port of `nsSMILKeySpline` code from Mozilla https://github.com/mozilla-services/services-central-legacy/blob/master/content/smil/nsSMILKeySpline.cpp
 

Sources/Easing/Easing.swift

@@ -71,9 +71,7 @@ public enum Easing {
     /**
       Calculate d value for g, where g1 = g1, d1 = d1, g2 = g2, d2 = d2
      */
-    public func calculate(
-        g1: Double, d1: Double, g2: Double, d2: Double, g: Double, clamp: Bool = true
-    ) -> Double {
+    public func calculate(g1: Double, d1: Double, g2: Double, d2: Double, g: Double, clamp: Bool = true) -> Double {
         var g = g
 
         if clamp {
@@ -163,7 +161,7 @@ public enum Easing {
         }
     }
 
-    //  Based on https://github.com/warrenm/AHEasing and https://github.com/ai/easings.net (https://easings.net)
+    //  Based on https://github.com/warrenm/AHEasing and https://github.com/ai/easings.net
 
     // Modeled after the line y = x
     private static func _linear(_ p: Double) -> Double {