Struct Update 

pub struct Update { /* private fields */ }

Rewrites one mobject from its start-of-clip state and progress: the building block for the simple animations below.

Implementations

impl Update

pub fn new( id: MobjectId, f: impl Fn(&VState, f32) -> VState + Send + Sync + 'static, ) -> Self

f(start_state, alpha) gives the mobject’s state at alpha.

Trait Implementations

impl Animation for Update

fn plan(&mut self, state: &SceneState)

Called once when played, with the scene state at the start of the clip. Do the expensive work (alignment, diffing) here.

fn sample(&self, alpha: f32, state: &mut SceneState)

Writes the targets’ state at eased progress alpha into state, which holds the scene as it was at the start of the clip. Must be cheap and pure.

fn duration(&self) -> f32

Length in seconds.

fn rate_fn(&self) -> RateFn

Easing applied to progress before sample.