1. A method of generating a control signal of a computing system including a touch sensitive surface, the method comprising: tracking a path of each contact of a set of one or more contacts, each contact corresponding to a touch object on or near the surface; determining motion information of the set of contacts based on the tracking; determining a liftoff from the touch sensitive surface of one or more contacts of the set based on the tracking; determining a dominant component of motion of the set of contacts based on the motion information prior to the liftoff, the dominant component of motion including one of translation, rotation, and scaling; determining a first motion of the one or more contacts determined to have lifted off based on the motion information prior to the liftoff, including determining a weighted average velocity of the dominant component of motion prior to the liftoff; determining whether the first motion is greater than a predetermined threshold; and generating, based on the determination of whether the first motion is greater than the predetermined threshold, a post-liftoff control signal based on the dominant component of motion.