Enum MotionTransition 

pub enum MotionTransition {
    Instant,
    Tween {
        duration_ms: u64,
        delay_ms: u64,
        easing: MotionEasing,
        repeat: bool,
        frame_interval_ms: Option<u64>,
    },
    Spring {
        stiffness: f32,
        damping: f32,
        mass: f32,
        epsilon: f32,
        delay_ms: u64,
    },
}

Timing model for a MotionTrack.

Use MotionTransition::tween for fixed-duration motion and MotionTransition::spring for spring-like motion. Transitions are data, so shells and tests can step them deterministically.

Variants

Instant

Applies the target value immediately.

Tween

Fixed-duration transition.

Fields

duration_ms: u64

Duration in milliseconds.

delay_ms: u64

Delay before the transition starts, in milliseconds.

easing: MotionEasing

Easing curve used for tween progress.

repeat: bool

Whether the tween repeats indefinitely.

frame_interval_ms: Option<u64>

Optional frame interval hint for repeated low-priority motion.

Spring

Spring-like transition.

Fields

stiffness: f32

Spring stiffness.

damping: f32

Spring damping.

mass: f32

Spring mass.

epsilon: f32

Completion epsilon.

delay_ms: u64

Delay before the spring starts, in milliseconds.

Implementations

impl MotionTransition

pub fn tween(duration_ms: u64, easing: MotionEasing) -> Self

Creates a fixed-duration tween transition.

pub fn spring(stiffness: f32, damping: f32) -> Self

Creates a spring-like transition.

pub fn delay_ms(self, delay_ms: u64) -> Self

Sets a start delay in milliseconds.

pub fn repeat(self, repeat: bool) -> Self

Enables or disables repeating tween playback.

pub fn frame_interval_ms(self, frame_interval_ms: Option<u64>) -> Self

Sets an optional frame interval hint for repeated tween playback.

Trait Implementations

impl Clone for MotionTransition

fn clone(&self) -> MotionTransition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MotionTransition

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

Formats the value using the given formatter.

impl Default for MotionTransition

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MotionTransition

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for MotionTransition

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for MotionTransition

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MotionTransition