1
$\begingroup$

The Vector Math node has an operation called Normalize. I have always presumed that this is a monadic operator which ignores the second input and returns a unit vector in the direction of the input vector. This is also what poor said in this answer.

However, I was recently reading the manual and noticed that it says:

Normalize
Normalizing input 1 and 2.

Which is super-duper unhelpful. I have never known of a binary "normalize" operation (and couldn't find one in a quick Google search), so I don't know what "Normalizing input 1 and 2" means.

So what is going on here? Does it use the second input, if so how? Or is the manual just plain wrong?

$\endgroup$
3
$\begingroup$

Input 2 is not used, manual is wrong, I guess. Links to the source code for the node are below, you can clearly see input 2 is never called when in normalize mode.

SVM: https://developer.blender.org/diffusion/B/browse/master/intern/cycles/kernel/svm/svm_math_util.h

OSL: https://developer.blender.org/diffusion/B/browse/master/intern/cycles/kernel/shaders/node_vector_math.osl

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.