simple_easing2/
sine.rs

1use std::f32::consts::PI;
2
3/// <https://easings.net/#easeInSine>
4#[must_use]
5#[inline(always)]
6pub fn sine_in(t: f32) -> f32 {
7    1.0 - (t * PI / 2.0).cos()
8}
9
10/// <https://easings.net/#easeOutSine>
11#[must_use]
12#[inline(always)]
13pub fn sine_out(t: f32) -> f32 {
14    (t * PI / 2.0).sin()
15}
16
17/// <https://easings.net/#easeInOutSine>
18#[must_use]
19#[inline(always)]
20pub fn sine_in_out(t: f32) -> f32 {
21    -((PI * t).cos() - 1.0) / 2.0
22}