/**
 * Returns signed distance from `p` to 2D hexagon of given radius `r`.
 *
 * @remarks
 * Ported from original GLSL impl by Inigo Quilez:
 * https://iquilezles.org/articles/distfunctions2d/
 */
export declare const sdfHexagon2: import("@thi.ng/shader-ast").TaggedFn2<"vec2", "float", "float">;
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