Math Primer: Trigonometry 101 - Flash 3D: Animation, Interactivity, and Games - page 132

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this.onEnterFrame = function()
{
if (spin == true)
{
angle += 5; // update the angle
setObject(); // move the object
wheel_mc._rotation = -angle; // rotate the wheel
if ( angle > maxAngle ) { spin = false; }
}
}

Exercise 5.2: Circular Motion of Multiple Objects

Now that we have one object rotating in a circle, let's see what needs to be done to
rotate several objects that are equally spaced around a circle. Lots of things move
around in circles. Let's go for a ride on the Silverfish Ferris wheel shown in Figure 5.21.

Figure 5.21 Circular motion of multiple objects