Patent ID: 8269729

Claim:
A method of interfacing with a multi-point input device, comprising the steps of: displaying an image on a display device, the image corresponding to a three-dimensional graphical representation of an object; detecting positions of at least three elements that are simultaneously in contact with the display device; identifying a change in an attribute of the at least three elements; controlling a change in the image displayed on the display device in accordance with the identified change in the attribute of the at least three elements, and calculating a centroid of the at least three elements, wherein identifying a change in an attribute comprises: identifying-movement of the centroid of the at least three elements, and identifying changes in distances of the positions of the elements to the centroid; and wherein controlling a change in the image displayed on the display device comprises: controlling translation of the three-dimensional graphical representation of the object along X and Y axes in accordance with movement of the centroid, and controlling movement of the three-dimensional graphical representation of the object along a Z axis as a function of the identified changes in distances of the positions of the elements to the centroid, the X, Y and Z axes being perpendicular to one another.