freya_hooks/use_animation/
animated_value.rs

1use std::{
2    fmt,
3    time::Duration,
4};
5
6use easer::functions::*;
7
8use super::AnimDirection;
9
10pub trait AnimatedValue: Clone + 'static {
11    fn prepare(&mut self, direction: AnimDirection);
12
13    fn is_finished(&self, index: u128, direction: AnimDirection) -> bool;
14
15    fn advance(&mut self, index: u128, direction: AnimDirection);
16
17    fn finish(&mut self, direction: AnimDirection);
18}
19
20#[derive(Default, Clone, Copy, PartialEq, Eq)]
21pub enum Ease {
22    In,
23    #[default]
24    Out,
25    InOut,
26}
27
28pub fn apply_value(
29    origin: f32,
30    destination: f32,
31    index: u128,
32    time: Duration,
33    ease: Ease,
34    function: Function,
35) -> f32 {
36    let (t, b, c, d) = (
37        index as f32,
38        origin,
39        destination - origin,
40        time.as_millis() as f32,
41    );
42
43    // We can skip the easing if we have reached the last index
44    if t >= d {
45        return destination;
46    }
47
48    match function {
49        Function::Back => match ease {
50            Ease::In => Back::ease_in(t, b, c, d),
51            Ease::InOut => Back::ease_in_out(t, b, c, d),
52            Ease::Out => Back::ease_out(t, b, c, d),
53        },
54        Function::Bounce => match ease {
55            Ease::In => Bounce::ease_in(t, b, c, d),
56            Ease::InOut => Bounce::ease_in_out(t, b, c, d),
57            Ease::Out => Bounce::ease_out(t, b, c, d),
58        },
59        Function::Circ => match ease {
60            Ease::In => Circ::ease_in(t, b, c, d),
61            Ease::InOut => Circ::ease_in_out(t, b, c, d),
62            Ease::Out => Circ::ease_out(t, b, c, d),
63        },
64        Function::Cubic => match ease {
65            Ease::In => Cubic::ease_in(t, b, c, d),
66            Ease::InOut => Cubic::ease_in_out(t, b, c, d),
67            Ease::Out => Cubic::ease_out(t, b, c, d),
68        },
69        Function::Elastic => match ease {
70            Ease::In => Elastic::ease_in(t, b, c, d),
71            Ease::InOut => Elastic::ease_in_out(t, b, c, d),
72            Ease::Out => Elastic::ease_out(t, b, c, d),
73        },
74        Function::Expo => match ease {
75            Ease::In => Expo::ease_in(t, b, c, d),
76            Ease::InOut => Expo::ease_in_out(t, b, c, d),
77            Ease::Out => Expo::ease_out(t, b, c, d),
78        },
79        Function::Linear => match ease {
80            Ease::In => Linear::ease_in(t, b, c, d),
81            Ease::InOut => Linear::ease_in_out(t, b, c, d),
82            Ease::Out => Linear::ease_out(t, b, c, d),
83        },
84        Function::Quad => match ease {
85            Ease::In => Quad::ease_in(t, b, c, d),
86            Ease::InOut => Quad::ease_in_out(t, b, c, d),
87            Ease::Out => Quad::ease_out(t, b, c, d),
88        },
89        Function::Quart => match ease {
90            Ease::In => Quart::ease_in(t, b, c, d),
91            Ease::InOut => Quart::ease_in_out(t, b, c, d),
92            Ease::Out => Quart::ease_out(t, b, c, d),
93        },
94        Function::Sine => match ease {
95            Ease::In => Sine::ease_in(t, b, c, d),
96            Ease::InOut => Sine::ease_in_out(t, b, c, d),
97            Ease::Out => Sine::ease_out(t, b, c, d),
98        },
99    }
100}
101
102#[derive(Default, Clone, Copy, Debug, PartialEq, Eq)]
103pub enum Function {
104    Back,
105    Bounce,
106    Circ,
107    Cubic,
108    Elastic,
109    Expo,
110    #[default]
111    Linear,
112    Quad,
113    Quart,
114    Sine,
115}
116
117impl fmt::Display for Function {
118    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
119        write!(f, "{:?}", self)
120    }
121}
freya_hooks/use_animation/animated_value.rs

freya_hooks/use_animation/
animated_value.rs
