Enum Ballistic 

pub enum Ballistic {
    Bouncing(BouncingScrollSimulation),
    Clamping(ClampingScrollSimulation),
    Spring(SpringSimulation),
}

The motion a scrollable follows once the finger has let go.

One enum rather than a boxed trait object: it stays Copy, so the runtime can keep one per axis in a plain map and sample it without an allocation per frame.

Variants

Bouncing(BouncingScrollSimulation)

Friction then spring-back — the bouncing family.

Clamping(ClampingScrollSimulation)

The platform spline deceleration — the clamping family.

Spring(SpringSimulation)

A plain return to an edge, with no fling.

Trait Implementations

impl Clone for Ballistic

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Ballistic

impl Debug for Ballistic

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Simulation for Ballistic

fn x(&self, time: f32) -> f32

The position at instant time.

fn dx(&self, time: f32) -> f32

The velocity — the derivative of position — at instant time.

fn is_done(&self, time: f32) -> bool

true once the motion has finished, within the tolerances.

fn tolerance(&self) -> Tolerance

The stopping thresholds.