/// <summary>
/// Adds a vector and a scalar.
/// </summary>
/// <param name="v">A <see cref="Vector3D"/> instance.</param>
/// <param name="s">A scalar.</param>
/// <returns>A new <see cref="Vector3D"/> instance containing the sum.</returns>
public static Vector3D operator+(double s, Vector3D v)
{
return(Vector3D.Add(v, s));
}
/// <summary>
/// Adds two vectors.
/// </summary>
/// <param name="u">A <see cref="Vector3D"/> instance.</param>
/// <param name="v">A <see cref="Vector3D"/> instance.</param>
/// <returns>A new <see cref="Vector3D"/> instance containing the sum.</returns>
public static Vector3D operator+(Vector3D u, Vector3D v)
{
return(Vector3D.Add(u, v));
}