Checking for parallel vectors - something is wrong.

[micheus]

The random vector doesn't interest me.

As I said, I have two vector - set by the user, where one is the reference and then I want to ensure the second one must be rotated from it by 90°. For that I'm using the cross operation - of course.

I think I'm going to computer the degree between them. It will be a little more expensive computationally, but I will be sue about what I'm evaluating.

Thanks.