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z axis
Figure 15-9. Rotation on the z axis
In 3D, you can also rotate on the x or y axis. An x-axis rotation looks like a car tire rolling toward you, as
shown in Figure 15-10, with the axle as the x-axis. Points rotate around that and change their y and z
positions.
x axis
Figure 15-10. Rotation on the x axis
For y-axis rotation, imagine a record player, something like Figure 15-11. The spindle is the y-axis, and the
points move on the x and z axes.
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