Quaternion Conjugate

Problem

Return the conjugate of the quaternion q = [w, x, y, z], which negates the vector part:

conj(q) = [w, -x, -y, -z]

Hint

For unit quaternions the conjugate is the inverse rotation.

case 1

in: [[1,2,3,4]]

expected: [1,-2,-3,-4]

case 2

in: [[0,0,0,0]]

expected: [0,0,0,0]

case 3

in: [[1.5,-2.5,3.5,-4.5]]

expected: [1.5,2.5,-3.5,4.5]

case 4

in: [[2,0,0,0]]

expected: [2,0,0,0]

Starter codePython

def quaternion_conjugate(q):
    # Your code here
    pass

4 test cases · run your code against them in the editor