Abstract: During control of a user interface via free-space motions of a hand or other suitable control object, switching between control modes can be facilitated by tracking the control object's movements relative to, and its penetration of, a virtual control construct (such as a virtual surface construct). The technology disclosed includes determining from the motion information whether a motion of the control object with respect to the virtual control construct is an engagement gesture, such as a virtual mouse click or other control device operation. The position of the virtual control construct can be updated, continuously or from time to time, based on the control object's location.

Abstract: A tool case for the storage of drill bits and similarly shaped tools includes two housing members that are hingedly attached and which open and close, with respect to one another. The tool case of the present invention includes elastomeric material surrounding the periphery of the tool case and tool trays on the inside of the case that retain inverted drill bits and similarly shaped tools. The tool trays disposed within the two housing members are removably attached to inner recessed cavities in the housing member by snapping male protrusions located on the tray into corresponding female recesses located on the inner surface of the recessed cavities.