Hi,
I noticed ( thanks to markinjapan) that the vector 3 operator action has an issue. It requires a the vector result field, but in some cases is actually not required, so this needs to be lifted.
I have updated the code of this post ( basically removed the Required flag on that vector and the [UIHint(UIHint.Variable)] as well, because that is wrong too in this context).
Alex, if you are ok with the change, you might be able to squeeze that for 1.2.1
Bye,
Jean