lue is positive when the positive z axis
rotates toward the positive y axis, and it is negative when the positive z axis
rotates toward the negative y axis. The range of values is 180 degrees to -180
degrees.</li>
  <li>Roll (degrees of rotation around the y axis). This value is positive when the positive z axis
rotates toward the positive x axis, and it is negative when the positive z axis
rotates toward the negative x axis. The range of values is 90 degrees to -90
degrees.</li>
</ul>

<p>This definition i