Struct Binding 

pub struct Binding {
    pub name: String,
    pub expr: Expr,
    pub tau: Easing,
    pub hold: Option<HoldEdge>,
    pub kind: ParamKind,
}

A named parameter bound to a compiled expression.

Fields

name: String

The system parameter this drives (e.g. warp, hue).

expr: Expr

The compiled expression producing its per-frame value.

tau: Easing

This binding’s easing constants (ADR-0019 / ADR-0035), read out of the preset’s [smoothing] table once, here at load. Easing::INSTANT — the default for an unlisted param — means no smoothing. Resolved at parse time rather than looked up per binding per frame (Plan 0031 Phase 3); it is a fact about the preset, and the preset does not change while it renders.

hold: Option<HoldEdge>

The musical edge this binding re-samples on (ADR-0180 rule 2), read out of the preset’s [hold] table once, here at load, for tau’s reason and at tau’s boundary.

None – the default for an unlisted param, and what every binding in the shipped set carried before holds existed – means the scene sees every frame’s value. Some means it sees the value taken at the last edge, and the render layer holds that value; nothing here does.

kind: ParamKind

What the parameter this binding drives is for (ADR-0180 rule 2), read off its ParamSpec here at load — tau’s boundary, for tau’s reason. A Structural value is rounded once, after the hold and after the smoother, before the scene sees it.

Folded rather than searched per frame: which kind a name carries is a fact about the engine, and the engine does not change while it runs.

Trait Implementations

impl Debug for Binding

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

Formats the value using the given formatter.