/**
 * Array and textureless GLSL 2D simplex noise function. Ported from original
 * GLSL implementation by Ian McEwan & Ashima Arts.
 *
 * https://github.com/ashima/webgl-noise
 */
export declare const snoise2: import("@thi.ng/shader-ast").TaggedFn1<"vec2", "float">;
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