This project is composed of a stand-alone library of easing functions implemented in Swift 4 (Easing.swift).
- Quadratic
- Cubic
- Quartic
- Quintic
- Sine
- Circular
- Exponential
- Elastic
- Back
- Bounce
Each type has its own separate ease-In, ease-Out and ease-In-Out form.
The functions are design to accept a generic floating-point value as time parameter,
and return a floating-point denoting the rate of change of a property over time.
Supported argument types:
- Float
- Double
- CGFloat
Add the file Easing.swift to your project and you are ready to go. The Curve type allows access to all the different functions, for example:
let x: Float = 0.3
let a = Curve.quadratic.easeIn(x)
// a = 0.09
let x2: CGFloat = 0.5
let b = Curve.sine.easeOut(x2)
// b = 0.7071067811865
Here's an example of the use of the elastic ease-in-out function in an array of 75 points in the [0, 1] interval.