Selective scan of touch-sensitive area for passive or active touch or proximity input

A method comprising:

• by a touch-sensor controller, scanning two or more electrodes within a touch-sensitive area of a touch sensor to determine a first location associated with an object within the touch-sensitive area during a first iteration;
• predicting, based on the first location associated with the object within the touch-sensitive area and one or more metrics, three next locations associated with the object within the touch-sensitive area;
• selecting, based on a first next location of the three next locations associated with the object within the touch-sensitive area, a first region within the touch-sensitive area;
• selecting, based on a second next location of the three next locations associated with the object within the touch-sensitive area, a second region within the touch-sensitive area, wherein the second region is at least partially different from the first region;
• and
• selecting, based on a third next location of the three next locations associated with the object within the touch-sensitive area, a third region within the touch-sensitive area, wherein the third region is at least partially different from the first region and the second region;
• scanning two or more electrodes within the first region, two or more electrodes within the second region, and two or more electrodes within the third region to determine a second location associated with the object within the touch-sensitive area during a second iteration.

One or more computer-readable non-transitory storage media embodying logic that is operable when executed to:

• scan two or more electrodes within a touch-sensitive area to determine a first location associated with an object within the touch-sensitive area during a first iteration;
• predict, based on the first location associated with the object within the touch-sensitive area and one or more metrics, three next locations associated with the object within the touch-sensitive area;
• select, based on a first next location of the three next locations associated with the object within the touch-sensitive area, a first region within the touch-sensitive area;
• select, based on a second next location of the three next locations associated with the object within the touch-sensitive area, a second region within the touch-sensitive area, wherein the second region is at least partially different from the first region;
• and
• select, based on a third next location of the three next locations associated with the object within the touch-sensitive area, a third region within the touch-sensitive area, wherein the third region is at least partially different from the first region and the second region;
• scan two or more electrodes within the first region, two or more electrodes within the second region, and two or more electrodes within the third region to determine a second location associated with the object within the touch-sensitive area during a second iteration.