/// <summary>
/// Subtracts a quaternion from a quaternion.
/// </summary>
/// <param name="a">A <see cref="QuaternionD"/> instance.</param>
/// <param name="b">A <see cref="QuaternionD"/> instance.</param>
/// <returns>A new <see cref="QuaternionD"/> instance containing the difference.</returns>
public static QuaternionD operator-(QuaternionD a, QuaternionD b)
{
return(QuaternionD.Subtract(a, b));
}
/// <summary>
/// Subtracts a quaternion from a quaternion.
/// </summary>
/// <param name="left">A <see cref="QuaternionD"/> instance.</param>
/// <param name="right">A <see cref="QuaternionD"/> instance.</param>
/// <returns>A new <see cref="QuaternionD"/> instance containing the difference.</returns>
public static QuaternionD operator -(QuaternionD left, QuaternionD right)
{
return(QuaternionD.Subtract(left, right));
}