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@mapbox/mapbox-gl-style-spec

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a specification for mapbox gl styles

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import Color from './color'; export function number(a: number, b: number, t: number): number { return (a * (1 - t)) + (b * t); } export function color(from: Color, to: Color, t: number): Color { return new Color( number(from.r, to.r, t), number(from.g, to.g, t), number(from.b, to.b, t), number(from.a, to.a, t) ); } export function array(from: Array<number>, to: Array<number>, t: number): Array<number> { return from.map((d, i) => { return number(d, to[i], t); }); }