The library contains the following easing functions with in, out, and in-out modes:

• sine
• quad
• cubic
• quart
• quint
• expo
• circ
• back
• elastic
• bounce

You can call a generic ease function:

const auto newValue = easing::ease(easing::Func::sine, easing::Mode::easeIn, value);

Or you can call the easing functions directly:

const auto newValue = easing::sineIn(value);

Easing libray's codebase is released to the Public Domain