/// <summary>
/// Multiplies this quaternion by the inverse of quaternion q1 and places
/// the value into this quaternion.
/// </summary>
/// <remarks>
/// Multiplies this quaternion by the inverse of quaternion q1 and places
/// the value into this quaternion. The value of the argument quaternion
/// is preserved (this = this * q^-1).
/// </remarks>
/// <param name="q1">the other quaternion</param>
public void MulInverse(Quat4d q1)
{
Quat4d tempQuat = new Quat4d(q1);
tempQuat.Inverse();
this.Mul(tempQuat);
}
/// <summary>
/// Multiplies quaternion q1 by the inverse of quaternion q2 and places
/// the value into this quaternion.
/// </summary>
/// <remarks>
/// Multiplies quaternion q1 by the inverse of quaternion q2 and places
/// the value into this quaternion. The value of both argument quaternions
/// is preservered (this = q1 * q2^-1).
/// </remarks>
/// <param name="q1">the first quaternion</param>
/// <param name="q2">the second quaternion</param>
public void MulInverse(Quat4d q1, Quat4d q2)
{
Quat4d tempQuat = new Quat4d(q2);
tempQuat.Inverse();
this.Mul(q1, tempQuat);
}