The capturing the entity may include displaying an initial calibration gradation line; and displaying a gesture gradation line associated with {TAIL ~ the entity} displayed on {HEAD ~ the display apparatus} 
The capturing the entity may include displaying an initial calibration gradation line ; and displaying a gesture gradation line associated with { TAIL ~ the entity } displayed on { HEAD ~ the display apparatus }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD