User selects an angular velocity of the axle, using the slider.
The range of values of the slider is -2 to 2 radians per second.
When START is pressed, the slider becomes inactive and three view buttons become active.
When RESET is pressed, the slider becomes active and the view buttons are deactivated.
Three frames are shown:
The angular velocity vector is computed in the disk frame. Rotation matrices change the frame. However, each velocity vector is a child of its associated object. This demonstrates the consistency of the method with the computer graphics hierarchy as follows:
To enable easy viewing, a checkbox can make the wheel invisible.