Unit2 Basic Arm kinematics

Hello!
My Question is related to python file of Unit2 rotations_conversion.py, why took offset in it as 1 and -1:
Code:
q_x = quaternion_about_axis(0, (1,0,0))
if roll>=0:
roll_range = range(0,roll,1)
offset = 1
else:
roll_range = range(0,roll,-1)
offset = -1

Hi
As far as I know its related to how eurler quaternion conversions work, to avoid overlapping values of angles get mixed up

Ok Thank you. Thats fine. :slight_smile: