How to make a unitized vector a vector? So, I can multiply it with a certain length like with the component ‘amplitude.’
Unitize is a method (does that require parenthesis in Python?) and doesn’t return a unitized vector, but rather unitizes the vector it is called on. In C# this would look like:
var yvector = ypn - plpn; // Assuming ypn and plpn are Point3d
yvector.Unitize();
Do you might know how I make a vector length ‘1’ in python?
yvector will be length 1.0 after you invoke Unitize(). Unless yVector was zero-length or unset to begin with, in which case Unitize cannot work.
owwwwwwwwwww, I get it
EDIT: no I do not get it,
when I do ‘Unitize()’ I got only True
EDIT: no, I think I got it, thank you 
I actually still do not get it.
I have a vector something like (-1.4123,-2.365,2.877) with a length longer than 1.
Do you might know how I can get it to a length of 1?
It is not everything dividing by 1, right?
I don’t have Rhino opened in front of me but if
vector = (-1.4123,-2.365,2.877)
then simply do:
vector.Unitize()
then the length should be 1.
But, it only gives True, do you might know what I am doing wrong?
dont print the vector, print it’s length
As I said above do not assign it to anything simply do
xvector.Unitize()
I need a vector, not a length.
Do I miss something?
you’re missing that you don’t create new vector you modify the existing one
print xvector and not xdirection
jeeeh!
haha that looks like a funny print statement 
and that will actually work
it doesn’t work it prints False
meaning it works, xvector and not xdirection
I could never understand these AND OR XOR completely
The bad news is that it should have worked the way you expected it to work. Vector3d is a struct and the general good practice rules for structs is that they should be immutable. Now, Microsoft themselves break this rule with types like System.Drawing.Point and System.Drawing.RectangleF, so it’s not a strong guideline.
These days I try to make my own types immutable as often as possible, and the hallmark of immutable types is that they always return a new instance of the type when you call a ‘modifier’ function.
I find it very inconvenient that methods modify my objects.