Angle between to vectors in VB

Hi all

If I have a list of unit vectors in VB and I wanted to calculated the vector between some other arbitrary unit vector, is there a way to do this through VB, as opposed to outputting into a list and using GH nodes downstream?

Preemptive thanks!

Replies to This Discussion

Permalink Reply by David Rutten on June 10, 2016 at 11:28am

You can use the Shared Rhino.Geometry.Vector3d.VectorAngle() function. It has two overloads, one which just computes the smallest angle through which you'd have to rotate one vector to get the other, and a function which calculates the angle in a specific plane.

Neither of them use the DotProduct operator, which is faster and sometimes suffices. The DotProduct does not allow you to determine that two vectors are pointing away from each other, instead you'll get the angle as if one vector were reversed.

Permalink Reply by JR Swift on June 10, 2016 at 12:12pm