Enum Track 

pub enum Track<T> {
    Const(T),
    Keys(Vec<Key<T>>),
    Expr(Vec<Compiled>),
    KeysExpr(Vec<Key<T>>, Vec<Compiled>),
    Sampled(Vec<T>),
}

A parameter: a constant, keyframes, an expression per component, or an expression over its own keys (value).

Variants

Const(T)

Keys(Vec<Key<T>>)

Sorted by t; held before the first and after the last.

Expr(Vec<Compiled>)

One per component.

KeysExpr(Vec<Key<T>>, Vec<Compiled>)

An expression per component over its own keys (value).

Sampled(Vec<T>)

Per frame, from the range’s first frame (internal: exact lowering).

Implementations

impl<T: Animatable> Track<T>

pub fn parse(v: &Value, clock: Clock, what: &str) -> Result<Self>

A constant, keys, an expression string (N = 1), an array of N constants or expressions, or {"keys": [...], "expr": ...}. what names the parameter in errors.

pub fn parse_in(v: &Value, scope: &Scope<'_>, what: &str) -> Result<Self>

Track::parse against scope (its clock and vars).

pub fn from_keys(keys: Vec<Key<T>>) -> Self

Keys in any order (sorted here, stable for equal times).

pub fn is_animated(&self) -> bool

Whether the value can change from frame to frame.

pub fn keys(&self) -> Option<&[Key<T>]>

The keys, if keyframed.

pub fn try_eval(&self, clock: Clock, frame: &Frame<'_>) -> Result<Option<T>>

The value on frame, None for empty keys; an error if an expression isn’t finite. Sampled reads frame’s n.

pub fn eval(&self, frame: &Frame<'_>) -> Result<T>

The value on frame, keys on Clock::Layer (lt).

pub fn at(&self, clock: Clock, t: f64, dur: f64) -> Option<T>

The value at t on clock when only that time is known (timeline effects), None for empty keys or a non-finite expression.

pub fn sample( &self, clock: Clock, frames: Range<i64>, env: &Env<'_>, ) -> Result<Vec<T>>

The values on frames in env (vars evaluated per frame). Sampled tracks index from the range’s start.

Trait Implementations

impl<T: Clone> Clone for Track<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Track<T>

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

Formats the value using the given formatter.

impl<T: Default> Default for Track<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: PartialEq> PartialEq for Track<T>

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

Equality operator ==.

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

Inequality operator !=.

impl<T: PartialEq> StructuralPartialEq for Track<T>