export type ArrowOptions = {
    bow?: number;
    stretchMin?: number;
    stretchMax?: number;
    stretch?: number;
    padStart?: number;
    padEnd?: number;
    flip?: boolean;
    straights?: boolean;
};
/**
   * getArrow
   * Get the points for a linking line between two points.
   * @description Draw an arrow between two points.
   * @param x0 The x position of the "from" point.
   * @param y0 The y position of the "from" point.
   * @param x1 The x position of the "to" point.
   * @param y1 The y position of the "to" point.
   * @param options Additional options for computing the line.
   * @returns [sx, sy, cx, cy, e1, e2, ae, as, ac]
   * @example
   * const arrow = getArrow(0, 0, 100, 200, {
      bow: 0
      stretch: .5
      stretchMin: 0
      stretchMax: 420
      padStart: 0
      padEnd: 0
      flip: false
      straights: true
   * })
   *
   * const [
   *  startX, startY,
   *  controlX, controlY,
   *  endX, endY,
   *  endAngle,
   *  startAngle,
   *  controlAngle
   *  ] = arrow
   */
export default function getArrow(x0: number, y0: number, x1: number, y1: number, options?: ArrowOptions): number[];