easing

A port of known Robert Penner's easing functions for Ruby, implemented both in pure-Ruby and with FFI.

Check out easings.net to help you easily visualize each of the easing functions.

Usage

All functions are defined in the Easing module, and they always receive the same 4 parameters:

• t: current time
• b: beginning or start value
• c: change in value (or destination - b)
• d: duration

(0..10).map { |t| Easing.ease_in_out_expo(t, 0, 10, 10) }
# => [0.0, 0.01953125, 0.078125, 0.3125, 1.2500000000000002, 5.0, 8.75, 9.6875, 9.921875, 9.98046875, 10.0]

Installation

Add this line to your application's Gemfile:

gem 'easing'

And then execute:

$ bundle

Or install it yourself as:

$ gem install easing

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request