Struct UpdateGroup 

pub struct UpdateGroup { /* private fields */ }

Rewrites several mobjects together from each one’s start state, their joint bounding-box center and progress: the building block for the emphasis animations below.

Implementations

impl UpdateGroup

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

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

Trait Implementations

impl Animation for UpdateGroup

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.