animate_core/tween/
cycle.rs

1use crate::{Animate, Cycle, TweenAnim, Tween, FRAME_TIME, IS_ANIMATING};
2use std::sync::atomic::Ordering;
3
4impl<T, E, I> Animate for Tween<T, E, I, Cycle>
5where
6    T: TweenAnim + PartialEq + Default,
7    E: Fn(f64) -> f64,
8    I: Fn(&T, &T, f64) -> T,
9{
10    type Value = T;
11
12    fn update(&mut self) {
13        if self.state.pending {
14            self.state.start = std::mem::take(&mut self.state.current);
15            self.state.pending = false;
16        }
17
18        if let Some(start_t) = self.state.started_at {
19            if self.state.duration > 0.0 {
20                let now = FRAME_TIME.load(Ordering::Relaxed);
21                let elapsed = now.saturating_sub(start_t) as f64;
22                let t_raw = (elapsed % self.state.duration) / self.state.duration;
23
24                self.state.current =
25                    (self.state.interp)(&self.state.start, &self.state.target, (self.state.easing)(t_raw));
26            }
27            IS_ANIMATING.store(true, Ordering::Relaxed);
28        }
29    }
30
31    fn get(&self) -> &T {
32        &self.state.current
33    }
34
35    fn set(&mut self, target: T) {
36        let now = FRAME_TIME.load(Ordering::Relaxed);
37
38        self.state.target = target;
39        self.state.started_at = Some(now);
40        self.state.pending = true;
41    }
42
43    fn target(&self) -> &T {
44        &self.state.target
45    }
46}
animate_core/tween/cycle.rs

animate_core/tween/
cycle.rs
