Retinal scanners

Half-Life (Goldsource)

The primary entities of a HL1 scanner are listed below. A complete tutorial (which is the source of the listed information) can be found here

• The player triggers (via a trigger_once) the whole sequence
• The barney walks over to the scanner performs his "retina" animation (scripted_sequence)
• The scanner model (a func_button) is activated so it flashes
• Some sounds (ambient_generic) are played to show that the scanner is operating
• The door (func_door) is triggered to open

Half-Life 2

Todo: Show how retinal scanners are implemented in hl2