/**
 * Cubic Bezier Interpolator for MMD animation interpolation
 */
export declare class BezierInterpolator {
    /**
     * Cubic Bezier interpolation
     * @param x1 X1
     * @param x2 X2
     * @param y1 Y1
     * @param y2 Y2
     * @param x Weight
     * @returns Interpolated value
     */
    static Interpolate(x1: number, x2: number, y1: number, y2: number, x: number): number;
}