# Crate easer [−] [src]

This library implements Robert Penner's easing functions. Easing functions calculate rate of change of a property over time.

A little website easings.net can help visualising functions. Another can help you understanding Easing functions in details upshots.org/jsas-understanding-easing.

is the current time (or position) of the tween. This can be seconds or frames, steps, seconds, ms, whatever as long as the unit is the same as is used for the total time.`t`

is the beginning value of the property.`b`

is the change between the beginning and destination value of the property.`c`

is the total time of the tween.`d`

#example

use easer::functions::*; let mut y: [f64; 100] = [0.0; 100]; for i in 0..100 { y[i] = i as f64; } println!("Before {:?}", &y[..]); y.iter_mut().map(|a| *a = Back::ease_in(*a, 0.0, 100.0, 100.0)).count(); println!("After {:?}", &y[..]);

## Modules

functions |