Trait Playable

Source

pub trait Playable: Update + Any {
    // Required methods
    fn duration(&self) -> f32;
    fn reset(&mut self);
    fn seek_to(&mut self, progress: f32);
    fn is_complete(&self) -> bool;
    fn as_any(&self) -> &(dyn Any + 'static);
    fn as_any_mut(&mut self) -> &mut (dyn Any + 'static);
}

Expand description

Object-safe animation interface used by composition containers.

Update is intentionally tiny: it only advances an animation. Playable adds the small amount of control a timeline needs to reset and seek children without knowing their concrete type.

Implementations should interpret seek_to as normalized progress through their finite duration, clamped to [0.0, 1.0].

§Example

use animato_core::{Playable, Update};

#[derive(Default)]
struct Clip { elapsed: f32 }

impl Update for Clip {
    fn update(&mut self, dt: f32) -> bool {
        self.elapsed = (self.elapsed + dt.max(0.0)).min(1.0);
        !self.is_complete()
    }
}

impl Playable for Clip {
    fn duration(&self) -> f32 { 1.0 }
    fn reset(&mut self) { self.elapsed = 0.0; }
    fn seek_to(&mut self, progress: f32) {
        self.elapsed = progress.clamp(0.0, 1.0);
    }
    fn is_complete(&self) -> bool { self.elapsed >= 1.0 }
    fn as_any(&self) -> &dyn core::any::Any { self }
    fn as_any_mut(&mut self) -> &mut dyn core::any::Any { self }
}