ranim_anims/
func.rs

1use ranim_core::animation::Eval;
2
3// MARK: Require Trait
4/// The requirement for [`Func`]
5pub trait FuncRequirement: Clone {}
6impl<T: Clone> FuncRequirement for T {}
7
8// MARK: Anim Trait
9/// The methods to create animations for `T` that satisfies [`FuncRequirement`]
10pub trait FuncAnim: FuncRequirement + 'static {
11    /// Create a [`Func`] anim.
12    fn func(&mut self, f: impl Fn(&Self, f64) -> Self + 'static) -> Func<Self>;
13}
14
15impl<T: FuncRequirement + 'static> FuncAnim for T {
16    fn func(&mut self, f: impl Fn(&Self, f64) -> Self + 'static) -> Func<Self> {
17        Func::new(self.clone(), f).apply_to(self)
18    }
19}
20
21// MARK: Impl
22/// An func anim.
23///
24/// This simply use the given func to eval the animation state.
25pub struct Func<T: FuncRequirement> {
26    src: T,
27    #[allow(clippy::type_complexity)]
28    f: Box<dyn Fn(&T, f64) -> T>,
29}
30
31impl<T: FuncRequirement> Func<T> {
32    /// Constructor
33    pub fn new(target: T, f: impl Fn(&T, f64) -> T + 'static) -> Self {
34        Self {
35            src: target,
36            f: Box::new(f),
37        }
38    }
39}
40
41impl<T: FuncRequirement> Eval for Func<T> {
42    type Output = T;
43
44    fn eval_alpha(&self, alpha: f64) -> Self::Output {
45        (self.f)(&self.src, alpha)
46    }
47}
ranim_anims/func.rs

ranim_anims/
func.rs
