So I got around to learning how to use that new-fangled wire mod, and one of the things I did was make a glass door that opens automatically.
The door is constrained with sliders and an invisible hydraulic. As you can see in the first picture, it is normally closed, but when a player gets closer, it slides open.
The last picture is the wiring arrangement. Basically how it works is the player's distance is measured (by the box and the hula doll outside) and when it is less than a constant, the length of the hydraulic is lowered by a certain amount. It's a simple thing, but the spread of electronics on the wall is quite impressive.
