How to perform multi-touch gestures on a single touch touch surface

摘要

Methods for activating multi-touch functionality by recognizing and processing multi-touch interactions on a touch surface of non-multi-touch computing devices. The computing device may detect a jump from the location of the first touch event to determine that a multiple touch gesture is being traced. Virtual touch events are detected and stored. Using mathematical formulae, parameters are calculated based on initial and subsequent virtual touch event locations. Based on these parameters the multi-touch functionality is determined, such as a zooming or rotating function. A transform factor may be determined and applied to the image display.