Sets this vector to a null vector.
SIVector3.SetNull();
dim v1 ' Create 3D vectors. set v1 = XSIMath.CreateVector3 v1.Set 2.0, 1.0, 3.0 v1.SetNull
SIVector3.Set SIVector3 SIMatrix3 SIMatrix4 SIRotation SITransformation SIQuaternion
