Struct Tween 

pub struct Tween { /* private fields */ }

A pure, deterministic scalar tween: from → to over duration ticks.

Loop modes map onto the ticket vocabulary as: one-shot = LoopMode::Once, repeat(N) = LoopMode::Repeat(N), infinite = Repeat(0), ping-pong = LoopMode::PingPong (0 = infinite).

value_at is a pure function of the tween’s parameters and the tick argument; step is the stateful equivalent advancing one tick at a time. Both observe identical sequences.

Implementations

impl Tween

pub fn new(from: i32, to: i32, duration: u32) -> Self

Create a tween from from to to over duration ticks (linear easing, one-shot).

A duration of 0 is born finished at the to value.

pub fn with_easing(self, easing: Easing) -> Self

Set the easing curve (builder pattern).

pub fn with_loop(self, loop_mode: LoopMode) -> Self

Set the loop mode (builder pattern).

pub fn value_at(&self, tick: u32) -> i32

Sample the tween at an absolute tick offset from its start.

Pure: depends only on the tween’s parameters and tick. Does not advance state.

pub fn step(&mut self) -> i32

Advance the tween by exactly one tick and return the new value.

Equivalent to value_at(elapsed + 1); elapsed saturates at u32::MAX.

pub fn value(&self) -> i32

Sample the tween at its current elapsed tick count.

pub fn elapsed(&self) -> u32

Ticks elapsed on the stateful path.

pub fn finished(&self) -> bool

Returns true once the tween has completed.

Infinite modes (Repeat(0), PingPong(0)) never finish.

Trait Implementations

impl Clone for Tween

fn clone(&self) -> Tween

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Tween

impl Debug for Tween

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

Formats the value using the given formatter.

impl PartialEq for Tween

fn eq(&self, other: &Tween) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Tween