/**
 * Piecewise-linear mapping utilities for non-linear slider behavior.
 *
 * When a slider's useful values are concentrated in a sub-range, these functions
 * allow that sub-range (the "focus range") to occupy a larger fraction of the
 * slider's physical width, giving finer control over sensitive values.
 *
 * The slider is split into up to three zones:
 *   [min, focusMin] — "before" zone
 *   [focusMin, focusMax] — "focus" zone (gets focusWeight of the width)
 *   [focusMax, max] — "after" zone
 *
 * The before and after zones share (1 - focusWeight) proportionally to their
 * value span relative to the total non-focus span.
 */
export type SliderScaleConfig = {
    focusRange: [number, number];
    focusWeight: number;
};
/**
 * Maps a real value to a normalized position [0, 1] using piecewise-linear scaling.
 */
export declare function valueToPosition(value: number, min: number, max: number, config: SliderScaleConfig): number;
/**
 * Maps a normalized position [0, 1] back to a real value using piecewise-linear scaling.
 * Inverse of valueToPosition.
 */
export declare function positionToValue(position: number, min: number, max: number, config: SliderScaleConfig): number;
/**
 * Creates a scale config object if valid focus parameters are provided.
 * Returns null if no focus config is provided, indicating linear behavior.
 */
export declare function createSliderScale(focusRange?: [number, number], focusWeight?: number): SliderScaleConfig | null;