Method normalize

packages/data-structures/src/Vector.ts:54–64

* 获得向量的单位向量 * 如果向量的模长为0，则返回(0,0) * @returns

()

   * @returns
   */
  normalize(): Vector {
    const mag = this.magnitude();
    const x = this.x / mag;
    const y = this.y / mag;

    if (Number.isNaN(x) || Number.isNaN(y)) {
      return Vector.getZero();
    }

    return new Vector(x, y);
  }

  dot(vector: Vector): number {
    return this.x * vector.x + this.y * vector.y;