Compares two vectors to see if they are parallel.
Rhino.IsVectorParallelTo (arrVector1, arrVector2 [, dlbAngleTolerance])
arrVector1 
Required. Array. The 3D vector. 
arrVector2 
Required. Array. The 3D vector to compare to. 
dlbAngleTolerance 
Optional. Number. The angle tolerance in radians. Of omitted, Rhino's default angle tolerance, PI/180.0, is used. 
Number 
The result of the comparison if successful. The possible results are as follows:


Null 
On error. 
Dim arrVector1, arrVector2
arrVector1 = Array(1,0,0)
arrVector2 = Array(0,1,0)
MsgBox Rhino.IsVectorParallelTo arrVector1, arrVector2