#
**
How do I rotate a vector around the Z axis?**

**MAXScript**
Frequently Asked
Questions

##
**
A user asked:**

I am
trying to rotate a unit vector around 360 degrees in steps of 2
degrees. It only needs to rotate around the Z axis, X and Y
stay the same.

##
**
Answer:**

The Matrix3 Values
topic
provides convenient ways to transform vectors (Point3 values)
including rotation about the world Z axis! You can simply construct
a rotateZMatrix value and transform the original vector using
it:

*
Script:*

resetMaxFile
#noPrompt --reset
the file

theV = normalize
[5,0,10] --the
vector to rotate,
normalized to unit vector

theStep = 10
--the
step by which you want to rotate

--rotate
from 0 to 360-theStep with step TheStep:

for
a
= 0 to
360-theStep
by
theStep
do

(

rm = rotateZMatrix
a --create
a rotation matrix from the value

theRotV = theV *
rm --transform
the original vector using the matrix

format "%: %\n" a
theRotV --print
the result to
Listener

c
= cylinder() --create
a cylinder

c.dir = theRotV
--orient
along the vector to see what it looks like

)

The
results looks like a muffin!

**See
also**

Frequently Asked
Questions