US Patent 10512839 Interacting with three-dimensional game elements using gaze detection

A method of operating an electronic gaming machine includes displaying a three-dimensional game component to a viewer of the electronic gaming machine, wherein the three-dimensional game component is generated to have an apparent spatial position having coordinates including a z-coordinate in a direction extending toward the viewer; detecting a gaze direction of the viewer; comparing the gaze direction of the viewer to the apparent spatial position of the three-dimensional game component; determining that the gaze of the viewer is directed toward the three-dimensional game component; and responsive to determining that the gaze of the viewer is directed toward the three-dimensional game component, changing the z-coordinate of the apparent spatial position of the three-dimensional game component.