step 1404 fig1 is a flowchart showing the left click gesture routine 1500 labeled c in fig1 in step 1502 a left click mouse down or pointer down event is reported at the original position to the general purpose computing device 32 by the master controller 30 at step 1504 a mouse up or pointer up event is reported to the general purpose computing device 32 by the master controller 30 the left click gesture routine 1500 is then exited and the classification routine returns to step 1340 fig1 is a flowchart showing the right click gesture routine 1600 labeled e in fig1 in step 1602 since the rightmost touch point was lost and the right click flag is set a right click mouse down or pointer down even is reported at the rightmost touch point to the general purpose computing device 32 by the master controller 30 in step 1604 a mouse up or pointer up event is reported to the general purpose computing device 32 by the master controller 30 the right click gesture routine 1600 is then exited and the classification routine returns to step 1340 fig1 is a flowchart showing the drag gesture routine 1700 labeled don fig1 in step 1702 since a drag gesture was detected a left click mouse down or pointer down event is reported at the original position to the general purpose computing device 32 by the master controller 30 in step 1704 observations generated by the imaging devices 40 and 42 following processing of the next frame are acquired in step 1706 it is determined whether the touch.