/**
 * Numeric utilities — `clamp`, `clamp01`, `lerp`.
 *
 * Pure-logic helper — no `three` dependency, safe to load from the
 * headless `sim` entry point and from any render code.
 */
/** Clamp value v to [lo, hi]. */
export declare function clamp(v: number, lo: number, hi: number): number;
/** Clamp value to [0, 1]. */
export declare function clamp01(v: number): number;
/** Linear interpolation from a to b by factor t (clamped to [0,1]). */
export declare function lerp(a: number, b: number, t: number): number;
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