export type TiltAxisLock = 'x' | 'y' | 'none';
export interface ComputeTiltOptions {
    maxTiltX: number;
    maxTiltY: number;
    easing: (t: number) => number;
    lockAxis: TiltAxisLock;
}
export interface TiltResult {
    rotateX: number;
    rotateY: number;
}
/**
 * Eases faster near the edges (|t| close to 1) and flatter near the center (|t| close to 0),
 * while staying odd-symmetric so tilt direction always matches cursor direction.
 */
export declare function defaultTiltEasing(t: number): number;
/**
 * Computes the tilt rotation for a pointer at (x, y) relative to `rect`'s top-left corner.
 * Vertical cursor position drives rotateX (tilts top/bottom edges), horizontal drives rotateY.
 */
export declare function computeTilt(x: number, y: number, rect: {
    width: number;
    height: number;
}, { maxTiltX, maxTiltY, easing, lockAxis }: ComputeTiltOptions): TiltResult;