Human-computer interface including efficient three-dimensional controls

Abstract

The present invention provides a method of human-computer interfacing that provides efficient implementation of intuitive controls in a three-dimensional space. The method comprises providing a three-dimensional space, characterized by x and y dimensions, together defining a plane approximately orthogonal to the user's direction of view into the space. A z dimension, approximately parallel to the direction of view, further characterizes the three-dimensional space. Objects in the space can be defined by x, y, and z coordinate sets. A control is provided having x and y coordinate sets as any other object. The z coordinate set of the control, however, spans a range of values, giving the control an increased depth. The control's range of z can be infinite, making the control accessible at all depths, or can be a finite range, making the control accessible only from that range of depths. Movement of a cursor into the region corresponding to the control initiates interaction with the user according to the control. The increased depth makes it easier for the user to access the control, since it reduces the precision of depth perception required to find the control. Once the user is in the region corresponding to the control, the effective depth for interaction can be relative to the depth when the user entered the control region, providing control interaction independent of entering depth.