6.3 SWEEP

Sweep method is designed for rotating objects with arbitrary accelerations and decelerations. Actually, the sweep is one of the most powerful tools when creating "character animations", such as walking human beings and robots.

The sweep method requires two parameters: the first one defining a center point for the rotation and the second one defining how the object is rotated. Rotation is executed exactly the same way as when the user rotates objects using the mouse and the function Modify/Linear/Rotate. Thus the first parameter is usually just an offset primitive, and the second some kind of curve defining a route for some point of the object. The method tries to move that point along the defined path while keeping the point defined by the first parameter fixed, making the object rotate.