export declare function cubicBezierPosition(x1: number, y1: number, cx1: number, cy1: number, cx2: number, cy2: number, x2: number, y2: number, t: number): {
    x: number;
    y: number;
};
export declare function cubicBezierTangent(x1: number, y1: number, cx1: number, cy1: number, cx2: number, cy2: number, x2: number, y2: number, t: number): {
    x: number;
    y: number;
    tangent: number;
};