public void InitFromQuaternion(SourceQuaternion orientation, SourceVector vPosition)
        {
            var t = this;

            MathUtils.QuaternionMatrix(orientation, vPosition, ref t);
            this.m_flMatVal = t.m_flMatVal;
        }
 public void InitFromQuaternion(SourceQuaternion orientation)
 {
     InitFromQuaternion(orientation, SourceVector.Empty);
 }